csarManager = {}
csarManager.version = "2.2.3"
csarManager.verbose = false 
csarManager.ups = 1 

--[[-- VERSION HISTORY
 - 1.0.0 initial version 
 - 1.0.1 - smoke optional 
	     - airframeCrashed method for airframe manager 
		 - removed '(downed )' when re-picked up 
		 - fixed oclock
 - 1.0.2 - hover retrieval 
 - 1.0.3 - corrected a bug in oclock during hovering 
 - 1.0.4 - now correctly allocates pilot to coalition via dcscommon.coalition2county
 - 1.1.0 - pilot adds weight to unit 
         - module check 
 - 2.0.0 - weight managed via cargoSuper
 - 2.0.1 - getCSARBaseforZone()
         - check if zone landed in has owner attribute 
		   to provide compatibility with owned zones, 
		   FARPZones etc that keep zone.owner up to date 
 - 2.0.2 - use parametric csarManager.hoverAlt
		 - use hoverDuration
 - 2.0.3 - corrected bug in hoverDuration
 - 2.0.4 - guard in createCSARMission for cfxCommander 
 - 2.1.0 - startCSAR?
		 - deferrable missions 
		 - verbose 
		 - ups 
		 - useSmoke
		 - smokeColor 
		 - reworked smoking the loc
		 - config zone 
		 - csarRedDelivered
		 - csarBlueDelivered
		 - finally fixed smoke performance bug 
		 - csarManager.vectoring optional 
 - 2.1.1 - zone-local verbosity
 - 2.1.2 - 'downed' machinations (paranthese)S
         - verbosity 
 - 2.1.3 - theMassObject now local 
		 - winch pickup now also adds weight so they can be returned 
		 - made some improvements to performance by making vars local 
 - 2.2.0 - interface for autoCSAR 
			createDownedPilot() - added existingUnit option 
			createCSARMissionData() - added existinUnit option
		 - when no config zone, runs through empty zone 
		 - actionSound 
		 - integration with playerScore 
		 - score global and per-mission 
		 - isCSARTarget API 
 - 2.2.1 - added troopCarriers attribute to config
		 - passes own troop carriers to dcsCommon.isTroopCarrier()
 - 2.2.2 - enable CSAR missions in water 
         - csar name defaults to zone name 
		 - better randomization of pilot's point in csar mission, 
		   supports quad zone 
 - 2.2.3 - better support for red/blue 
		 - allow neutral pick-up 
		 - directions to closest safe zone 
		 - CSARBASE attribute now carries coalition
		 - deprecated coalition attribute 

	INTEGRATES AUTOMATICALLY WITH playerScore IF INSTALLED
		 
--]]--
-- modules that need to be loaded BEFORE I run 
csarManager.requiredLibs = {
	"dcsCommon", -- common is of course needed for everything
	"cfxZones", -- zones management for CSAR and CSAR Mission zones
	"cfxPlayer", -- player monitoring and group monitoring 
	"nameStats", -- generic data module for weight 
	"cargoSuper",
--	"cfxCommander", -- needed only if you want to hand-create CSAR missions
}


--
-- OPTIONS
--
csarManager.useSmoke = true  
csarManager.smokeColor = 4 -- when using smoke


-- unitConfigs contain the config data for any helicopter
-- currently in the game. The Array is indexed by unit name 
csarManager.unitConfigs = {}
csarManager.myEvents = {3, 4, 5} -- 3 = take off, 4 = land, 5 = crash

--
-- CASR MISSION
--
csarManager.openMissions = {} -- all currently available missions
csarManager.csarBases = {} -- all bases where we can drop off rescued pilots. NOT a zone!
csarManager.csarZones = {} -- zones for spawning 

csarManager.missionID = 1 -- to create uuid
csarManager.rescueRadius = 70 -- must land within 50m to rescue
csarManager.hoverRadius = 30 -- must hover within 10m of unit 
csarManager.hoverAlt = 40 -- must hover below this alt 
csarManager.hoverDuration = 20 -- must hover for this duration
csarManager.rescueTriggerRange = 2000 -- when the unit pops smoke and radios
csarManager.beaconSound = "Radio_beacon_of_distress_on_121,5_MHz.ogg"
csarManager.pilotWeight = 120 -- kg for the rescued person. added to the unit's weight
csarManager.vectoring = true -- provide bearing and range 
--
-- callbacks
-- 
csarManager.csarCompleteCB = {}

--
-- CREATING A CSAR 
--
function csarManager.createDownedPilot(theMission, existingUnit)
	
	if not cfxCommander then 
		trigger.action.outText("+++CSAR: can't create mission, module cfxCommander is missing.", 30)
		return 
	end
	
	if not existingUnit then 
		local aLocation = {}
		local aHeading = 0 -- in rads
		local newTargetZone = theMission.zone
		-- if mission.radius is < 1 we do not randomize location 
		-- else location is somewhere in the middle of zone 
		-- csar mission zones randomize by themselves, and pass 
		-- a radius of <1, this is only for ejecting pilots 
		if newTargetZone.radius > 1 then 
			aLocation, aHeading = dcsCommon.randomPointOnPerimeter(newTargetZone.radius / 2 + 3, newTargetZone.point.x, newTargetZone.point.z) 
		else 
			aLocation.x = newTargetZone.point.x
			aLocation.z = newTargetZone.point.z
			aHeading = math.random(360)/360 * 2 * 3.1415 
		end

		local theBoyGroup = dcsCommon.createSingleUnitGroup(theMission.name, 
								"Soldier M4 GRG", -- "Soldier M4 GRG",
								aLocation.x, 
								aLocation.z, 
								-aHeading + 1.5) -- + 1.5 to turn inwards
		
		-- WARNING:
		-- coalition.addGroup takes the COUNTRY of the group, and derives the 
		-- coalition from that. So if mission.sie is 0, we use UN, if it is 1 (red) it
		-- is joint red, if 2 it is joint blue 
		local theSideCJTF = dcsCommon.coalition2county(theMission.side) -- get the correct county CJTF 
		theMission.group = coalition.addGroup(theSideCJTF, 
											  Group.Category.GROUND, 
											  theBoyGroup)
		
		if theBoyGroup then 

		else 
			trigger.action.outText("+++csar: FAILED to create csar!", 30)
		end
	else 
		theMission.group = existingUnit:getGroup()
	end
	
	-- we now use commands to send radio transmissions
	local ADF = 20 + math.random(90)
	if theMission.freq then ADF = theMission.freq else theMission.freq = ADF end 
	local theCommands = cfxCommander.createCommandDataTableFor(theMission.group)
	local cmd = cfxCommander.createSetFrequencyCommand(ADF) -- freq in 10000 Hz
	cfxCommander.addCommand(theCommands, cmd)
	cmd = cfxCommander.createTransmissionCommand(csarManager.beaconSound)
	cfxCommander.addCommand(theCommands, cmd)
	cfxCommander.scheduleCommands(theCommands, 2) -- in 2 seconds, so unit has time to percolate through DCS
end

function csarManager.createCSARMissionData(point, theSide, freq, name, numCrew, timeLimit, mapMarker, inRadius, parashootUnit) -- if parashootUnit is set, will not allocate new
	-- create a type 
	if not timeLimit then timeLimit = -1 end
	if not point then return nil end 
	local newMission = {}
	newMission.side = theSide
	if dcsCommon.stringStartsWith(name, "downed ") then 
		-- remove "downed" - it will be added again later
		name = dcsCommon.removePrefix(name, "downed ")
		if csarManager.verbose then 
			trigger.action.outText("+++csar: 'downed' procced for <" .. name .. ">", 30)
		end
	end
	if not inRadius then inRadius = csarManager.rescueRadius end 
	
	newMission.name = "downed " .. name .. "-" .. csarManager.missionID -- make it uuid-capable
	newMission.zone = cfxZones.createSimpleZone(newMission.name, point, inRadius) --csarManager.rescueRadius)
	newMission.marker = mapMarker -- so it can be removed later
	newMission.isHot = false -- creating adversaries will make it hot, or when units are near. maybe implement a search later?
	-- detection and load stuff
	newMission.lastSmokeTime = -1000 -- so it will smoke immediately 
	newMission.messagedUnits = {} -- so we remember whom the unit radioed
	newMission.hoveringUnits = {} -- used when hovering 
	newMission.freq = freq -- if nil will make random 
			
	-- allocate units
	csarManager.createDownedPilot(newMission, parashootUnit)
	
	-- update counter and return
	csarManager.missionID = csarManager.missionID + 1
	return newMission
end

function csarManager.addMission(theMission)
	table.insert(csarManager.openMissions, theMission)
end

function csarManager.removeMission(theMission)
	if not theMission then return end 
	local newMissions = {}
	for idx, aMission in pairs (csarManager.openMissions) do
		if aMission ~= theMission then 
			table.insert(newMissions, aMission)
		else 
		end
	end
	csarManager.openMissions = newMissions -- this is the new batch
end

function csarManager.removeMissionForGroup(theDownedGroup)
	if not theDownedGroup then return end 
	local newMissions = {}
	for idx, aMission in pairs (csarManager.openMissions) do
		if aMission.group ~= theDownedGroup then 
			table.insert(newMissions, aMission)
		else 
		end
	end
	csarManager.openMissions = newMissions -- this is the new batch
end

function csarManager.isCSARTarget(theGroup) 
	for idx, theMission in pairs(csarManager.openMissions) do
		if theMission.group == theGroup then return true end
	end 
	return false
end
--
-- UNIT CONFIG 
--
function csarManager.resetConfig(conf)
	-- reset only ovberwrites mission-relevant data
	conf.troopsOnBoard = {} -- number of rescued missions
	local myName = conf.name
	cargoSuper.removeAllMassForCargo(myName, "Evacuees") -- will allocate new empty table 
	conf.currentState = -1 -- indetermined, 0 = landed 1 = airborne
	conf.timeStamp = timer.getTime()
end

function csarManager.createDefaultConfig(theUnit)
	local conf = {}
	conf.theUnit = theUnit 
	conf.name = theUnit:getName()
	csarManager.resetConfig(conf)
	--conf.unit = {} -- the unit this is linked to
	conf.myMainMenu = nil -- this is the main menu for group
	conf.myCommands = nil -- all commands in sub menu
	conf.id = theUnit:getID()
	return conf 
end


function csarManager.getUnitConfig(theUnit) -- will create new config if not existing
	if not theUnit then
		trigger.action.outText("+++csar: nil unit in get config!", 30)
		return nil 
	end
	local uName = theUnit:getName()
	local c = csarManager.getConfigForUnitNamed(uName)
	if not c then 
		c = csarManager.createDefaultConfig(theUnit)
		csarManager.unitConfigs[uName] = c 
	end
	return c 
end

function csarManager.getConfigForUnitNamed(aName)
	return csarManager.unitConfigs[aName]
end


function csarManager.removeConfigForUnitNamed(aName) 
	if not aName then return end 
	if csarManager.unitConfigs[aName] then 
		csarManager.unitConfigs[aName] = nil 
	end
end

--
-- E V E N T   H A N D L I N G 
-- 
function csarManager.isInteresting(eventID) 
	-- return true if we are interested in this event, false else 
	for key, evType in pairs(csarManager.myEvents) do 
		if evType == eventID then return true end
	end
	return false 
end

function csarManager.preProcessor(event)
	-- make sure it has an initiator
	if not event.initiator then return false end -- no initiator 
	local theUnit = event.initiator 
	local cat = theUnit:getCategory()
	if cat ~= Unit.Category.HELICOPTER then 
		return false 
	end
	
	--trigger.action.outText("+++csar: event " .. event.id .. " for cat = " .. cat .. " (helicopter?)  unit " .. theUnit:getName(), 30)
	
	if not cfxPlayer.isPlayerUnit(theUnit) then 
		--trigger.action.outText("+++csar: rejected event: " .. theUnit:getName() .. " not a player helo", 30)
		return false 
	end -- not a player unit
	return csarManager.isInteresting(event.id) 
end

function csarManager.postProcessor(event)
	-- don't do anything for now
end

function csarManager.somethingHappened(event)
	-- when this is invoked, the preprocessor guarantees that
	-- it's an interesting event
	-- unit is valid and player 
	-- airframe category is helicopter 
	local theUnit = event.initiator
	local ID = event.id
	
	local myType = theUnit:getTypeName()
	
	if ID == 4 then  -- landed
		csarManager.heloLanded(theUnit)
	end
	
	if ID == 3 then -- take off
		csarManager.heloDeparted(theUnit)
	end
	
	if ID == 5 then -- crash 
		csarManager.heloCrashed(theUnit)
	end
	
	csarManager.setCommsMenu(theUnit)
end

--
--
-- CSAR LANDED
--
--

function csarManager.successMission(who, where, theMission)
	-- who is 
	-- where is 
	-- theMission is mission table 
	
	-- playerScore integration
	if cfxPlayerScore then 
		local theScore = theMission.score 
		if not theScore then theScore = csarManager.rescueScore end
		
		local theUnit = Unit.getByName(who)
		if theUnit and theUnit.getPlayerName then 
			local pName = theUnit:getPlayerName()
			if pName then 
				cfxPlayerScore.updateScoreForPlayer(pName, theScore)
				cfxPlayerScore.logFeatForPlayer(pName, "Evacuated " .. theMission.name)
			end
		end
	end
	
	trigger.action.outTextForCoalition(theMission.side,
		who .. " successfully evacuated " .. theMission.name .. " to " .. where .. "!", 
		30)
	
	-- now call callback for coalition side 
	-- callback has format callback(coalition, success true/false, numberSaved, descriptionText)
	
	csarManager.invokeCallbacks(theMission.side, true, 1, "success")

	trigger.action.outSoundForCoalition(theMission.side, csarManager.actionSound) -- "Quest Snare 3.wav")
	
	if csarManager.csarRedDelivered and theMission.side == 1 then 
		cfxZones.pollFlag(csarManager.csarRedDelivered, "inc", csarManager.configZone)
	end
	
	if csarManager.csarBlueDelivered and theMission.side == 2 then 
		cfxZones.pollFlag(csarManager.csarBlueDelivered, "inc", csarManager.configZone)
	end
	
	if csarManager.csarDelivered then 
		cfxZones.pollFlag(csarManager.csarDelivered, "inc", csarManager.configZone)
		if csarManager.verbose then 
			trigger.action.outText("+++csar: banging csarDelivered: <" .. csarManager.csarDelivered .. ">", 30)
		end 
	end
end

function csarManager.heloLanded(theUnit)
	-- when we have landed, 
	if not dcsCommon.isTroopCarrier(theUnit, csarManager.troopCarriers) then return end
	local conf = csarManager.getUnitConfig(theUnit)
	conf.unit = theUnit
	local theGroup = theUnit:getGroup()
	conf.id = theGroup:getID()
	--conf.id = theUnit:getID()
	conf.currentState = 0
	local thePoint = theUnit:getPoint()
	local mySide = theUnit:getCoalition()
	local myName = theUnit:getName()	

	-- first, check if we have landed in a CSAR dropoff zone 
	-- if so, drop off all loaded csar troops and award the 
	-- points or airframes 
	local allEvacuees = cargoSuper.getManifestFor(myName, "Evacuees") -- returns unlinked array 
											
	if csarManager.verbose then 
		trigger.action.outText("+++csar: helo <" .. myName .. "> landed with <" .. #allEvacuees .. "> evacuees on board.",30)
	end 
											
	if #allEvacuees > 0 then -- wasif #conf.troopsOnBoard > 0 then
		if csarManager.verbose then 
			trigger.action.outText("+++csar: checking bases:", 30)
		end
		
		for idx, base in pairs(csarManager.csarBases) do
			if csarManager.verbose then 
				trigger.action.outText("+++csar: base <" .. base.zone.name .. ">", 30)
			end
			-- check if the attached zone has changed hands
			-- this can happen if zone has its own owner 
			-- attribute and is conquered by another side 
			local currentBaseSide = base.side
			
			if base.zone.owner then 
				-- this zone is shared with capturable (owned)
				-- zone extensions like owned zone, FARP etc.
				-- use current owner
				currentBaseSide = base.zone.owner 
			end
			
			if currentBaseSide == mySide or 
			   currentBaseSide == 0 
			then  -- can always land in neutral
				if cfxZones.pointInZone(thePoint, base.zone) then 
					if csarManager.verbose or base.zone.verbose then 
						trigger.action.outText("+++csar: <" .. myName .. "> touch down in CSAR drop-off zone <" .. base.zone.name .. ">", 30)
					end 
					
					for idx, msn in pairs(conf.troopsOnBoard) do 
						-- each troopsOnboard is actually the 
						-- csar mission that I picked up 
						csarManager.successMission(myName, base.name, msn)
					end
					-- now use cargoSuper to retrieve all evacuees 
					-- and deliver them to safety 
					
					for idx, theMassObject in pairs(allEvacuees) do
						cargoSuper.removeMassObjectFrom(
											myName, 
											"Evacuees", 
											theMassObject)
						msn = theMassObject.ref 
						-- csarManager.successMission(myName, base.name, msn)
						-- to be done when we remove troopsOnBoard
					end					
					-- reset weight 
					local totalMass = cargoSuper.calculateTotalMassFor(myName)
					trigger.action.setUnitInternalCargo(myName, totalMass) -- super recalcs
--					trigger.action.outText("+++csar: delivered - set internal weight for " .. myName .. " to " .. totalMass, 30)
	
--					trigger.action.setUnitInternalCargo(myName, 10) -- 10 kg as empty 
					conf.troopsOnBoard = {} -- empty out troops on board 
					-- we do *not* return so we can pick up troops on 
					-- a CSARBASE if they were dropped there
				
				else
					if csarManager.verbose or base.zone.verbose then 
						trigger.action.outText("+++csar: touchdown of <" .. myName .. "> occured outside of csar zone <" .. base.zone.name .. ">", 30)
					end
				end
				
			else -- not on my side 
				if csarManager.verbose or base.zone.verbose then 
					trigger.action.outText("+++csar: base <" .. base.zone.name .. "> is on side <" .. currentBaseSide .. ">, which is not on my side <" .. mySide .. ">.", 30)
				end 
			end -- my side?
		end -- for all bases 
		if csarManager.verbose then 
			trigger.action.outText("+++csar: complete bases check", 30)
		end
	end -- check only if I'm carrying evacuees

	-- if not in a csar dropoff zone, check if we are 
	-- landed in a csar pickup zone, and start loading 
	
	local pickups = {}
	for idx, mission in pairs(csarManager.openMissions) do 
		if mySide == mission.side then 
			-- see if we are inside the mission's rescue range 
			local d = dcsCommon.distFlat(thePoint, mission.zone.point)
			if d < csarManager.rescueRadius then 
				-- pick up this mission and remove it from the 
				table.insert(pickups, mission)
			end
		end
	end
	
	-- now process the missions that I've picked up, transfer them to troopsOnBoard, and remove the dudes
	local didPickup = false 
	for idx, theMission in pairs(pickups) do
		trigger.action.outTextForCoalition(mySide,
		myName .. " is extracting " .. theMission.name .. "!", 
		30)
		didPickup = true;
		
		csarManager.removeMission(theMission)
		table.insert(conf.troopsOnBoard, theMission)
		theMission.group:destroy() -- will shut up radio as well
		theMission.group = nil
		-- now adapt for cargoSuper 
		local theMassObject = cargoSuper.createMassObject(
				csarManager.pilotWeight, 
				theMission.name, 
				theMission)
		cargoSuper.addMassObjectTo(
				myName, 
				"Evacuees", 
				theMassObject)
	end
	if didPickup then 
		trigger.action.outSoundForCoalition(mySide, csarManager.actionSound) -- "Quest Snare 3.wav")
	end
	-- reset unit's weight based on people on board
	local totalMass = cargoSuper.calculateTotalMassFor(myName)
	-- WAS: trigger.action.setUnitInternalCargo(myName, 10 + #conf.troopsOnBoard * csarManager.pilotWeight) -- 10 kg as empty + per-unit time people 
	trigger.action.setUnitInternalCargo(myName, totalMass) -- 10 kg as empty + per-unit time people 
--	trigger.action.outText("+++csar: set internal weight for " .. myName .. " to " .. totalMass, 30)
	
end

--
--
-- Helo took off
--
--
function csarManager.heloDeparted(theUnit)
	if not dcsCommon.isTroopCarrier(theUnit, csarManager.troopCarriers) then return end
	-- if we have timed extractions (i.e. not instantaneous),
	-- then we need to check if we take off after the timer runs out 
	
	
	-- when we take off, all that needs to be done is to change the state 
	-- to airborne, and then set the status flag 
	local conf = csarManager.getUnitConfig(theUnit)
	conf.unit = theUnit
	local theGroup = theUnit:getGroup()
	conf.id = theGroup:getID()
	conf.currentState = 1 -- in the air 
end

--
-- 
-- Helo Crashed 
--
--
function csarManager.heloCrashed(theUnit)
	if not dcsCommon.isTroopCarrier(theUnit, csarManager.troopCarriers) then return end
	-- problem: this isn't called on network games. 
	
	-- clean up 
	local conf = csarManager.getUnitConfig(theUnit)
	conf.unit = theUnit 
	local theGroup = theUnit:getGroup()
	conf.id = theGroup:getID()
	conf.currentState = -1 -- (we don't know)
	
	conf.troopsOnBoard = {}
	local myName = conf.name
	cargoSuper.removeAllMassForCargo(myName, "Evacuees") -- will allocate new empty table 
	csarManager.removeComms(conf.unit)
end

function csarManager.airframeCrashed(theUnit)
	-- called from airframe manager 
	if not dcsCommon.isTroopCarrier(theUnit, csarManager.troopCarriers) then return end
	local conf = csarManager.getUnitConfig(theUnit)
	conf.unit = theUnit 
	local theGroup = theUnit:getGroup()
	conf.id = theGroup:getID()
	-- may want to do something, for now just nothing
	
end

function csarManager.airframeDitched(theUnit)
	-- called from airframe manager 
	if not dcsCommon.isTroopCarrier(theUnit, csarManager.troopCarriers) then return end
	
	local conf = csarManager.getUnitConfig(theUnit)
	conf.unit = theUnit 
	local theGroup = theUnit:getGroup()
	conf.id = theGroup:getID()
	local theSide = theUnit:getCoalition()
	if #conf.troopsOnBoard > 0 then 
		-- this is where we can create a new CSAR mission
		trigger.action.outTextForCoalition(theSide, theUnit:getName() .. " abandoned while evacuating " .. #conf.troopsOnBoard .. " pilots. There many be survivors.", 30)
--		trigger.action.outSoundForCoalition(conf.id, "Quest Snare 3.wav")
		for i=1, #conf.troopsOnBoard do 
			local msn = conf.troopsOnBoard[i] -- picked up unit(s)
			local theRescuedPilot = msn.name 
			-- create x new missions in 50m radius
			-- except for pilot, that will be called 
			-- from limitedAirframes
			csarManager.createCSARforUnit(theUnit, theRescuedPilot, 50, true)
		end
	end
	-- NYI: re-populate from cargo 
	local myName = conf.name
	cargoSuper.removeAllMassForCargo(myName, "Evacuees") -- will allocate new empty table 
end

--
--
-- M E N U   H A N D L I N G   &   R E S P O N S E 
-- 
-- 
function csarManager.clearCommsSubmenus(conf)
	if conf.myCommands then 
		for i=1, #conf.myCommands do
			missionCommands.removeItemForGroup(conf.id, conf.myCommands[i])
		end
	end
	conf.myCommands = {}
end

function csarManager.removeCommsFromConfig(conf)
	csarManager.clearCommsSubmenus(conf)
	
	if conf.myMainMenu then 
		missionCommands.removeItemForGroup(conf.id, conf.myMainMenu) 
		conf.myMainMenu = nil
	end
end

function csarManager.removeComms(theUnit)
	if not theUnit then return end
	if not theUnit:isExist() then return end 
	
	local group = theUnit:getGroup() 
	local id = group:getID()
	local conf = csarManager.getUnitConfig(theUnit)
	conf.id = id
	conf.unit = theUnit 
	
	csarManager.removeCommsFromConfig(conf)
end


function csarManager.setCommsMenu(theUnit)
	if not theUnit then return end
	if not theUnit:isExist() then return end 
	
	-- we only add this menu to helicopter troop carriers
	-- will also filter out all non-helicopters as nice side effect
	if not dcsCommon.isTroopCarrier(theUnit, csarManager.troopCarriers) then return end
	
	local group = theUnit:getGroup() 
	local id = group:getID()
	local conf = csarManager.getUnitConfig(theUnit) -- will allocate if new. This is important since a group event can call this as well
	conf.id = id; -- we do this ALWAYS to it is current even after a crash 
	conf.unit = theUnit -- link back
	
	-- reset all coms now
	csarManager.removeCommsFromConfig(conf)
	
	-- ok, first, if we don't have an F-10 menu, create one 
	conf.myMainMenu = missionCommands.addSubMenuForGroup(id, 'CSAR Missions') 
	
	-- now we have a menu without submenus. 
	-- add our own submenus
	local commandTxt = "List active CSAR requests"
	local theCommand =  missionCommands.addCommandForGroup(
				conf.id, 
				commandTxt,
				conf.myMainMenu,
				csarManager.redirectListCSARRequests, 
				{conf, "hi there"}
				)
	table.insert(conf.myCommands, theCommand)
	commandTxt = "Status of rescued crew aboard"
	theCommand =  missionCommands.addCommandForGroup(
				conf.id, 
				commandTxt,
				conf.myMainMenu,
				csarManager.redirectStatusCarrying, 
				{conf, "hi there"}
				)
	table.insert(conf.myCommands, theCommand)
	
	commandTxt = "Unload one evacuee here (rescue later)"
	theCommand =  missionCommands.addCommandForGroup(
				conf.id, 
				commandTxt,
				conf.myMainMenu,
				csarManager.redirectUnloadOne, 
				{conf, "unload one"}
				)
	table.insert(conf.myCommands, theCommand)
	
	commandTxt = "Direction to nearest safe zone"
	theCommand =  missionCommands.addCommandForGroup(
				conf.id, 
				commandTxt,
				conf.myMainMenu,
				csarManager.redirectDirections, 
				{conf, "redirect"}
				)
	table.insert(conf.myCommands, theCommand)
end


function csarManager.redirectListCSARRequests(args)
	timer.scheduleFunction(csarManager.doListCSARRequests, args, timer.getTime() + 0.1)
end

function csarManager.openMissionsForSide(theSide)
	local theMissions = {}
	for idx, aMission in pairs(csarManager.openMissions) do 
		if aMission.side == theSide or aMission.side == 0 then 
			table.insert(theMissions, aMission)
		end
	end
	return theMissions
end

function csarManager.doListCSARRequests(args) 
	local conf = args[1]
	local param = args[2]
	local theUnit = conf.unit 
	local point = theUnit:getPoint()
	local theSide = theUnit:getCoalition() 
	
	--trigger.action.outText("+++csar: ".. theUnit:getName() .."  issued csar status request", 30)
	local report = "\nCrews requesting evacuation\n"
	local openMissions = csarManager.openMissionsForSide(theSide)
	
	if #openMissions < 1 then 
		report = report .. "\nNo requests, all crew are safe."
	else 
		-- iterate through all troops onboard to get their status
		for idx, mission in pairs(openMissions) do 
			local d = dcsCommon.distFlat(point, mission.zone.point) * 0.000539957
			d = math.floor(d * 10) / 10
			local b = dcsCommon.bearingInDegreesFromAtoB(point, mission.zone.point)
			local status = "alive"
			if csarManager.vectoring then 
				report = report .. "\n".. mission.name .. ", bearing " .. b .. ", " ..d .."nm, " .. " ADF " .. mission.freq .. "0 kHz - " .. status
			else 
				-- leave out vectoring 
				report = report .. "\n".. mission.name .. " ADF " .. mission.freq .. "0 kHz - " .. status
			end
		end
	end
	local myBases = csarManager.getCSARBasesForSide(theSide) 
	if #myBases < 1 then 
		report = report .. "\n\nWARNING: NO CSAR BASES TO DELIVER EVACUEES TO"
	end
	
	report = report .. "\n"
	
	trigger.action.outTextForGroup(conf.id, report, 30)
	trigger.action.outSoundForGroup(conf.id, csarManager.actionSound) --  "Quest Snare 3.wav")
end

function csarManager.redirectStatusCarrying(args)
	timer.scheduleFunction(csarManager.doStatusCarrying, args, timer.getTime() + 0.1)
end

function csarManager.doStatusCarrying(args) 
	local conf = args[1]
	local param = args[2]
	local theUnit = conf.unit 
	
	--trigger.action.outText("+++csar: ".. theUnit:getName() .."  wants to know how their rescued troops are doing", 30)
	
	-- build status report
	local report = "\nCrew Rescue Status:\n"
	if #conf.troopsOnBoard < 1 then 
		report = report .. "\nWe have no evacuees on board"
	else 
		-- iterate through all troops onboard to get their status
		for i=1, #conf.troopsOnBoard do 
			local evacMission = conf.troopsOnBoard[i]
			report = report .. "\n".. i .. ") " .. evacMission.name 
			report = report .. " is stable" -- or 'beat up, but will live'
		end
		
		report = report .. "\n\nTotal added weigth: " .. 10 + #conf.troopsOnBoard * csarManager.pilotWeight .. "kg" 
	end
	
	
	report = report .. "\n"
	
	trigger.action.outTextForGroup(conf.id, report, 30)
	trigger.action.outSoundForGroup(conf.id, csarManager.actionSound) -- "Quest Snare 3.wav")
end

function csarManager.redirectUnloadOne(args)
	timer.scheduleFunction(csarManager.unloadOne, args, timer.getTime() + 0.1)
end

function csarManager.unloadOne(args)
	local conf = args[1]
	local param = args[2]
	local theUnit = conf.unit 
	local myName = theUnit:getName() 
	
	local report = "NYI: unload one"
	
	if theUnit:inAir() then 
		report = "STRONGLY recommend we land first, Sir!"
		trigger.action.outTextForGroup(conf.id, report, 30)
		trigger.action.outSoundForGroup(conf.id, csarManager.actionSound) -- "Quest Snare 3.wav")
		return 
	end
	
	if #conf.troopsOnBoard < 1 then
		report = "No evacuees on board."
		trigger.action.outTextForGroup(conf.id, report, 30)
		trigger.action.outSoundForGroup(conf.id, csarManager.actionSound) -- "Quest Snare 3.wav")
		
	else 
		-- simulate a crash but for one unit 
		local theSide = theUnit:getCoalition()
		-- this is where we can create a new CSAR mission
		i= #conf.troopsOnBoard 
		local msn = conf.troopsOnBoard[i] -- picked up unit(s)
		local theRescuedPilot = msn.name 
		-- create a new missions in 50m radius
		csarManager.createCSARforUnit(theUnit, theRescuedPilot, 50, true)
		conf.troopsOnBoard[i] = nil -- remove this mission
		--TODO: remove weight for this pilot!
		
		trigger.action.outTextForCoalition(theSide, myName .. " has aborted evacuating " .. msn.name .. ". New CSAR available.", 30)
		trigger.action.outSoundForCoalition(theSide, csarManager.actionSound) -- "Quest Snare 3.wav")
		
		-- recalc weight
		trigger.action.setUnitInternalCargo(myName, 10 + #conf.troopsOnBoard * csarManager.pilotWeight) -- 10 kg as empty + per-unit time people 
	end
	
end

function csarManager.redirectDirections(args)
	timer.scheduleFunction(csarManager.directions, args, timer.getTime() + 0.1)
end

function csarManager.directions(args)
	local conf = args[1]
	local param = args[2]
	local theUnit = conf.unit 
	local myName = theUnit:getName() 
	local theSide = theUnit:getCoalition()
	local report = "Nothing to report."
	
	-- get all safe zones 
	local myBases = csarManager.getCSARBasesForSide(theSide) 
	if #myBases < 1 then 
		report = "\n\nWARNING: NO CSAR BASES TO DELIVER EVACUEES TO"
	else
		-- find nearest zone 
		local p = theUnit:getPoint()
		p.y = 0 
		local dMin = math.huge 
		local theBase = nil 
		local dP = nil
		for idx, aBase in pairs(myBases) do 
			local z = aBase.zone 
			local zp = cfxZones.getPoint(z) 
			zp.y = 0 
			local d = dcsCommon.dist(p, zp)
			if d < dMin then 
				theBase = aBase
				dP = zp
				dMin = d
			end 
		end
		
		-- see if we are inside 
		if cfxZones.isPointInsideZone(p, theBase.zone) then 
			report = "\nYou are inside safe zone " .. theBase.name .. "."
		else 
		-- get bearing and distance 
			dMin = dMin / 1000 * 0.539957 -- in nm 
			
			dMin = math.floor(dMin * 10) / 10 
			local bearing = dcsCommon.bearingInDegreesFromAtoB(p, dP)
			report = "\nClosest safe zone for " .. myName .. " is " .. theBase.name ..", bearing " .. bearing .. " at " .. dMin .. "nm"
		end 
	end
	
	report = report .. "\n"
	trigger.action.outTextForGroup(conf.id, report, 30)
	trigger.action.outSoundForGroup(conf.id, csarManager.actionSound)	
end
--
-- Player event callbacks
--
function csarManager.playerChangeEvent(evType, description, player, data)
	if evType == "newGroup" then 
		local theUnit = data.primeUnit
		if not dcsCommon.isTroopCarrier(theUnit, csarManager.troopCarriers) then return end 
		
		csarManager.setCommsMenu(theUnit) -- allocates new config
--		trigger.action.outText("+++csar: added " .. theUnit:getName() .. " to comms menu", 30)
		return 
	end
	
	if evType == "removeGroup" then 
--		trigger.action.outText("+++csar: a group disappeared", 30)
		local conf = csarManager.getConfigForUnitNamed(data.primeUnitName)
		if conf then 
			csarManager.removeCommsFromConfig(conf)
		end
		return
	end
	
	if evType == "leave" then 
		local conf = csarManager.getConfigForUnitNamed(player.unitName)
		if conf then 
			csarManager.resetConfig(conf)
		end
	end
	
	if evType == "unit" then 
		-- player changed units. almost never in MP, but possible in solo
		-- because of 1 seconds timing loop 
		-- will result in a new group appearing and a group disappearing, so we are good,
		-- except we need to reset the conf so no troops are carried any longer
		local conf = csarManager.getConfigForUnitNamed(data.oldUnitName) 
		if conf then 
			csarManager.resetConfig(conf)
		end
	end
end

--
-- CSAR Bases
--
-- properties: 
--  - zone : the zone 
--  - side : coalition 
--  - name : name of base, can be overriden with property

function csarManager.addCSARBase(aZone)
	local csarBase = {}
	csarBase.zone = aZone 

--[[--
	local bName = cfxZones.getStringFromZoneProperty(aZone, "CSARBASE", "XXX")
	if bName == "XXX" then bName = aZone.name end 
	csarBase.name =  cfxZones.getStringFromZoneProperty(aZone, "name", bName) 
--]]--
	-- CSARBASE now carries the coalition in the CSARBASE attribute
	csarBase.side = cfxZones.getCoalitionFromZoneProperty(aZone, "CSARBASE", 0) 
	-- backward-compatibility to older versions. 
	-- will be deprecated 
	if cfxZones.hasProperty(aZone, "coalition") then 
		csarBase.side = cfxZones.getCoalitionFromZoneProperty(aZone, "CSARBASE", 0)
	end
	
	-- see if we have provided a name field, default zone name  
	csarBase.name = cfxZones.getStringFromZoneProperty(aZone, "name", aZone.name) 
		
	table.insert(csarManager.csarBases, csarBase)
	
	if csarManager.verbose or aZone.verbose then 
		trigger.action.outText("+++csar: zone <" .. csarBase.name .. "> safe for side " .. csarBase.side, 30)
	end
end

function csarManager.getCSARBaseforZone(aZone)
	for idx, aCsarBase in pairs(csarManager.csarBases) do 
		if aCsarBase.zone == aZone then 
			return aCsarBase 
		end
	end
	return nil
end

function csarManager.getCSARBasesForSide(theSide) 
	local bases = {}
	for idx, aBase in pairs(csarManager.csarBases) do 
		if aBase.side == 0 or aBase.side == theSide then 
			table.insert(bases, aBase)
		end
	end
	return bases
end
--
--
-- U P D A T E 
-- ===========
-- 
-- 

--
-- updateCSARMissions: make sure evacuees are still alive 
--
function csarManager.updateCSARMissions()
	local newMissions = {}
	for idx, aMission in pairs (csarManager.openMissions) do
		local stillAlive = dcsCommon.isGroupAlive(aMission.group)
		-- now check if a timer was running to rescue this group
		-- if dead, set stillAlive to false 
		if stillAlive then 
			table.insert(newMissions, aMission)
		else 
			local msg = aMission.name .. " confirmed KIA, repeat KIA. Abort CSAR."	
			trigger.action.outTextForCoalition(aMission.side, msg, 30)
			trigger.action.outSoundForCoalition(aMission.side, csarManager.actionSound) -- "Quest Snare 3.wav")
		end
	end
	csarManager.openMissions = newMissions -- this is the new batch
end

function csarManager.update() -- every second
	-- schedule next invocation
	timer.scheduleFunction(csarManager.update, {}, timer.getTime() + 1/csarManager.ups)

	-- first, check the health of all csar misions and update the table of live units
	csarManager.updateCSARMissions()

	-- now scan through all helo groups and see if they are close to a 
	-- CSAR zone and initiate the help sequence 
	local allPlayerGroups = cfxPlayerGroups -- cfxPlayerGroups is a global, don't fuck with it! 
	-- contains per group a player record, use prime unit to access player's unit 
	for gname, pgroup in pairs(allPlayerGroups) do 
		local aUnit = pgroup.primeUnit --		get prime unit of that group
		if aUnit:isExist() and aUnit:inAir() then -- exists and is flying 
			local uPoint = aUnit:getPoint()
			local uName = aUnit:getName()
			local uGroup = aUnit:getGroup()
			local uID = uGroup:getID()
			local uSide = aUnit:getCoalition()
			local agl = dcsCommon.getUnitAGL(aUnit)
			if dcsCommon.isTroopCarrier(aUnit, csarManager.troopCarriers) then 
				-- scan through all available csar missions to see if we are close 
				-- enough to trigger comms 
				for idx, csarMission in pairs (csarManager.openMissions) do
					-- check if we are inside trigger range on the same side
					local d = dcsCommon.distFlat(uPoint, csarMission.zone.point)
					if ((uSide == csarMission.side) or (csarMission.side == 0) )
					and (d < csarManager.rescueTriggerRange) then 
						-- we are in trigger distance. if we did not notify before
						-- do it now 
						if not dcsCommon.arrayContainsString(csarMission.messagedUnits, uName) then 
							-- radio this unit with oclock and tell it they are in 2k range 
							-- also note if LZ is hot 
							local ownHeading = dcsCommon.getUnitHeadingDegrees(aUnit)
							local oclock = dcsCommon.clockPositionOfARelativeToB(csarMission.zone.point, uPoint, ownHeading) .. " o'clock"
							local msg = "\n" .. uName ..", " .. csarMission.name .. ". We can hear you, check your " .. oclock 
							if csarManager.useSmoke then msg = msg .. " - popping smoke" end
							msg = msg .. "."
							if csarMission.isHot then 
								msg = msg .. " Be advised: LZ is hot."
							end
							msg = msg .. "\n"
							trigger.action.outTextForGroup(uID, msg, 30)
							trigger.action.outSoundForGroup(uID, csarManager.actionSound) -- "Quest Snare 3.wav")
							table.insert(csarMission.messagedUnits, uName) -- remember that we messaged them so we don't do again
						end
						-- also pop smoke if not popped already, or more than 5 minutes ago
						if csarManager.useSmoke and  (timer.getTime() - csarMission.lastSmokeTime) >= 5 * 60 then 
							local smokePoint = dcsCommon.randomPointOnPerimeter(
								50, csarMission.zone.point.x, csarMission.zone.point.z) --cfxZones.createHeightCorrectedPoint(csarMission.zone.point)
							-- trigger.action.smoke(smokePoint, 4 )
							dcsCommon.markPointWithSmoke(smokePoint, csarManager.smokeColor)
							csarMission.lastSmokeTime = timer.getTime()
						end
						
						-- now check if we are inside hover range and alt 
						-- in order to simultate winch ops 
						-- WARNING: WE ALWAYS ONLY CHECK A SINGLE UNIT - the first alive
						local evacuee = csarMission.group:getUnit(1)
						if evacuee then 
							local ep = evacuee:getPoint()
							d = dcsCommon.distFlat(uPoint, ep)
							d = math.floor(d * 10) / 10
							if d < csarManager.hoverRadius * 2 then
								local ownHeading = dcsCommon.getUnitHeadingDegrees(aUnit)
								local oclock = dcsCommon.clockPositionOfARelativeToB(ep, uPoint, ownHeading) .. " o'clock"
								-- log distance 
								local hoverMsg = "Closing on " .. csarMission.name .. ", " .. d * 3 .. "ft on your " .. oclock .. " o'clock"

								if d < csarManager.hoverRadius then 
									if (agl <= csarManager.hoverAlt) and (agl > 3) then 
										local hoverTime = csarMission.hoveringUnits[uName]
										if not hoverTime then 
											-- create new entry
											hoverTime = timer.getTime()
											csarMission.hoveringUnits[uName] = timer.getTime() 
										end
										hoverTime = timer.getTime() - hoverTime -- calculate number of seconds 
										local remainder = math.floor(csarManager.hoverDuration - hoverTime)
										if remainder < 1 then remainder = 1 end 
										hoverMsg = "Steady... " .. d * 3 .. "ft to your " .. oclock .. " o'clock, winching... (" .. remainder .. ")" 
										if hoverTime > csarManager.hoverDuration then 
											-- we rescued the guy!
											hoverMsg = "We have " .. csarMission.name .. " safely on board!"
											local conf = csarManager.getUnitConfig(aUnit)
											csarManager.removeMission(csarMission)
											table.insert(conf.troopsOnBoard, csarMission)
											csarMission.group:destroy() -- will shut up radio as well
											csarMission.group = nil
											
											-- now handle weight using cargoSuper 
											local theMassObject = cargoSuper.createMassObject(
												csarManager.pilotWeight, 
												csarMission.name, 
												csarMission)
											cargoSuper.addMassObjectTo(
												uName, 
												"Evacuees", 
												theMassObject)
											local totalMass = cargoSuper.calculateTotalMassFor(uName)
											trigger.action.setUnitInternalCargo(uName, totalMass)
											
											if csarManager.verbose then 
												local allEvacuees = cargoSuper.getManifestFor(myName, "Evacuees") -- returns unlinked array 
												trigger.action.outText("+++csar: <" .. uName .. "> now has <" .. #allEvacuees .. "> groups of evacuees on board, totalling " .. totalMass .. "kg", 30)
											end
											
											trigger.action.outTextForGroup(uID, hoverMsg, 30, true)
											trigger.action.outSoundForGroup(uID, csarManager.actionSound) --"Quest Snare 3.wav")

											return -- we only ever rescue one 
										end -- hovered long enough 
										trigger.action.outTextForGroup(uID, hoverMsg, 30, true)
										return -- only ever one winch op
									else -- too high for hover 
										hoverMsg = "Evacuee " .. d * 3 .. "ft on your " .. oclock .. " o'clock; land or descend to between 10 and 90 AGL for winching"
										csarMission.hoveringUnits[uName] = nil -- reset timer 
									end
								else -- not inside hover dist
									-- remove the hover indicator for this 
									csarMission.hoveringUnits[uName] = nil 
								end 
								trigger.action.outTextForGroup(uID, hoverMsg, 30, true)
								return -- only ever one winch op
							else 
								-- remove the hover indicator for this unit
								csarMission.hoveringUnits[uName] = nil
							end -- inside 2 * hover dist?
							
						end -- has evacuee 
					end -- if in range
				end -- for all missions 
			end -- if troop carrier 
		end -- if exists 
	end -- for all players 
	
	-- now see and check if we need to spawn from a csar zone
	-- that has been told to spawn 
	for idx, theZone in pairs(csarManager.csarZones) do 
		-- check if their flag value has changed
		if theZone.startCSAR then 
			-- this should always be true, but you never know
			local currVal = cfxZones.getFlagValue(theZone.startCSAR, theZone)
			if currVal ~= theZone.lastCSARVal then 
				-- set up random point in zone 
				local mPoint = cfxZones.createRandomPointInZone(theZone)
				local theMission = csarManager.createCSARMissionData(
						mPoint, --cfxZones.getPoint(theZone), -- point
						theZone.csarSide, -- theSide
						theZone.csarFreq, -- freq
						theZone.csarName, -- name 
						theZone.numCrew, -- numCrew
						theZone.timeLimit, -- timeLimit
						theZone.csarMapMarker, -- mapMarker
						0.1, --theZone.radius) -- radius
						nil) -- parashoo unit 
				csarManager.addMission(theMission)
				theZone.lastCSARVal = currVal
				if csarManager.verbose then 
					trigger.action.outText("+++csar: started CSAR mission " .. theZone.csarName, 30)
				end
			end
		end
	end
end

--
-- create a CSAR Mission for a unit 
-- 
function csarManager.createCSARforUnit(theUnit, pilotName, radius, silent, score) -- invoked with aircraft as theUnit, usually still in air
	if not silent then silent = false end 
	if not radius then radius = 1000 end 
	if not pilotName then pilotName = "Eddie" end 
	
	local point = theUnit:getPoint()
	local coal = theUnit:getCoalition() 
	
	local csarPoint = dcsCommon.randomPointInCircle(radius, radius/2, point.x, point.z) 
	
	-- check the ground- water will kill the pilot 
	-- not any more! pilot can float 
	
	csarPoint.y = csarPoint.z 
	local surf = land.getSurfaceType(csarPoint)
	
	--[[--
	if surf == 2 or surf == 3 then 
		if not silent then 
			trigger.action.outTextForCoalition(coal, "Bad chute! Bad chute! ".. pilotName .. " did not survive ejection out of their " .. theUnit:getTypeName(), 30)
			trigger.action.outSoundForGroup(coal, csarManager.actionSound) --  "Quest Snare 3.wav")
		end
		return 
	end
	--]]--
	
	csarPoint.y = land.getHeight(csarPoint)
	
	-- when we get here, the terrain is ok, so let's drop the pilot 
	local theMission = csarManager.createCSARMissionData(
		csarPoint, -- point
		coal, -- side
		nil, -- freq 
		pilotName, -- name 
		1, -- num crew 
		nil, -- time limit 
		nil) -- map mark, inRadius, parashooUnit 
	theMission.score = score 
	csarManager.addMission(theMission)
	if not silent then 
		trigger.action.outTextForCoalition(coal, "MAYDAY MAYDAY MAYDAY! ".. pilotName .. " in " .. theUnit:getTypeName() .. " ejected, report good chute. Prepare CSAR!", 30)
		trigger.action.outSoundForGroup(coal, csarManager.actionSound) -- "Quest Snare 3.wav")
	end 
end

function csarManager.createCSARForParachutist(theUnit, name) -- invoked with parachute guy on ground as theUnit
	local coa = theUnit:getCoalition()
	local pos = theUnit:getPoint()
	-- unit DOES NOT HAVE GROUP!!! (unless water splashdown)
	-- create a CSAR mission now
	local theMission = csarManager.createCSARMissionData(pos, coa, nil, name, nil, nil, nil, 0.1, nil)
	csarManager.addMission(theMission)
--	if not silent then 
	trigger.action.outTextForCoalition(coa, "MAYDAY MAYDAY MAYDAY! ".. name ..  " requesting extraction after eject!", 30)
	trigger.action.outSoundForGroup(coa, csarManager.actionSound) -- "Quest Snare 3.wav")
--	end 
end

--
-- csar (mission) zones 
-- 

function csarManager.processCSARBASE()
	local csarBases = cfxZones.zonesWithProperty("CSARBASE")
	
	-- now add all zones to my zones table, and init additional info
	-- from properties
	for k, aZone in pairs(csarBases) do
		csarManager.addCSARBase(aZone)
	end
end

function csarManager.addCSARZone(theZone)
	table.insert(csarManager.csarZones, theZone)
end

function csarManager.readCSARZone(theZone)
	-- zones have attribute "CSAR" 
	-- gather data, and then create a mission from this
	local theSide = cfxZones.getCoalitionFromZoneProperty(theZone, "coalition", 0)
	theZone.csarSide = theSide 
	theZone.csarName = cfxZones.getStringFromZoneProperty(theZone, "name", "<none>")
	theZone.csarName = theZone.name -- default CSAR Name 
	if cfxZones.hasProperty(theZone, "csarName") then 
		theZone.csarName = cfxZones.getStringFromZoneProperty(theZone, "csarName", "<none>")
	end
	if cfxZones.hasProperty(theZone, "pilotName") then 
		theZone.csarName = cfxZones.getStringFromZoneProperty(theZone, "pilotName", "<none>")
	end
	
	if cfxZones.hasProperty(theZone, "victimName") then 
		theZone.csarName = cfxZones.getStringFromZoneProperty(theZone, "victimName", "<none>")
	end
	
	theZone.csarFreq = cfxZones.getNumberFromZoneProperty(theZone, "freq", 0)
	if theZone.csarFreq == 0 then theZone.csarFreq = nil end 
	theZone.numCrew = 1 
	theZone.csarMapMarker = nil 
	theZone.timeLimit = cfxZones.getNumberFromZoneProperty(theZone, "timeLimit", 0)
	if theZone.timeLimit == 0 then theZone.timeLimit = nil else theZone.timeLimit = timeLimit * 60 end 
	
	local deferred = cfxZones.getBoolFromZoneProperty(theZone, "deferred", false)
	
	if cfxZones.hasProperty(theZone, "in?") then
		theZone.startCSAR = cfxZones.getStringFromZoneProperty(theZone, "in?", "*none")
		theZone.lastCSARVal = cfxZones.getFlagValue(theZone.startCSAR, theZone)
	end 
	
	if cfxZones.hasProperty(theZone, "startCSAR?") then
		theZone.startCSAR = cfxZones.getStringFromZoneProperty(theZone, "startCSAR?", "*none")
		theZone.lastCSARVal = cfxZones.getFlagValue(theZone.startCSAR, theZone)
	end 
	
	if cfxZones.hasProperty(theZone, "score") then 
		theZone.score = cfxZones.getNumberFromZoneProperty(theZone, "score", 100)
	end
	
	if (not deferred) then 
		local mPoint = cfxZones.createRandomPointInZone(theZone)
		local theMission = csarManager.createCSARMissionData(
			mPoint, 
			theZone.csarSide, 
			theZone.csarFreq, 
			theZone.csarName, 
			theZone.numCrew, 
			theZone.timeLimit, 
			theZone.csarMapMarker,
			0.1, -- theZone.radius,
			nil) -- parashoo unit 
		csarManager.addMission(theMission)
	end

	-- add to list of startable csar
	if theZone.startCSAR then 
		csarManager.addCSARZone(theZone)
		trigger.action.outText("csar: added <".. theZone.name .."> to deferred csar missions", 30)
	end 
	
	if deferred and not theZone.startCSAR then 
		trigger.action.outText("+++csar: warning - CSAR Mission in Zone <" .. theZone.name .. "> can't be started", 30)
	end
end

function csarManager.processCSARZones()
	local csarBases = cfxZones.zonesWithProperty("CSAR")
	
	-- now add all zones to my zones table, and init additional info
	-- from properties
	for k, aZone in pairs(csarBases) do
	
		csarManager.readCSARZone(aZone)
		
	end
end

--
-- Init & Start 
--

function csarManager.invokeCallbacks(theCoalition, success, numRescued, notes)
	-- invoke anyone who wants to know that a group 
	-- of people was rescued.
	for idx, cb in pairs(csarManager.csarCompleteCB) do 
		cb(theCoalition, success, numRescued, notes)
	end
end

function csarManager.installCallback(theCB)
	table.insert(csarManager.csarCompleteCB, theCB)
end

function csarManager.readConfigZone()
	local theZone = cfxZones.getZoneByName("csarManagerConfig") 
	if not theZone then 
		if csarManager.verbose then 
			trigger.action.outText("+++csar: NO config zone!", 30)
		end 
		theZone = cfxZones.createSimpleZone("csarManagerConfig") 
	end 
	csarManager.configZone = theZone -- save for flag banging compatibility 
	
	csarManager.verbose = cfxZones.getBoolFromZoneProperty(theZone, "verbose", false)
	
	csarManager.ups = cfxZones.getNumberFromZoneProperty(theZone, "ups", 1)
	
	csarManager.useSmoke = cfxZones.getBoolFromZoneProperty(theZone, "useSmoke", true)
	csarManager.smokeColor = cfxZones.getSmokeColorStringFromZoneProperty(theZone, "smokeColor", "blue")
	csarManager.smokeColor = dcsCommon.smokeColor2Num(csarManager.smokeColor)
	
	
	if cfxZones.hasProperty(theZone, "csarRedDelivered!") then 
		csarManager.csarRedDelivered = cfxZones.getStringFromZoneProperty(theZone, "csarRedDelivered!", "*<none>")
	end
	
	if cfxZones.hasProperty(theZone, "csarBlueDelivered!") then 
		csarManager.csarBlueDelivered = cfxZones.getStringFromZoneProperty(theZone, "csarBlueDelivered!", "*<none>")
	end
	
	if cfxZones.hasProperty(theZone, "csarDelivered!") then 
		csarManager.csarDelivered = cfxZones.getStringFromZoneProperty(theZone, "csarDelivered!", "*<none>")

	end
	
	csarManager.rescueRadius = cfxZones.getNumberFromZoneProperty(theZone, "rescueRadius", 70) --70 -- must land within 50m to rescue
	csarManager.hoverRadius = cfxZones.getNumberFromZoneProperty(theZone, "hoverRadius", 30) -- 30 -- must hover within 10m of unit 
	csarManager.hoverAlt = cfxZones.getNumberFromZoneProperty(theZone, "hoverAlt", 40) -- 40 -- must hover below this alt 
	csarManager.hoverDuration = cfxZones.getNumberFromZoneProperty(theZone, "hoverDuration", 20) -- 20 -- must hover for this duration
	csarManager.rescueTriggerRange = cfxZones.getNumberFromZoneProperty(theZone, "rescueTriggerRange", 2000) -- 2000 -- when the unit pops smoke and radios
	csarManager.beaconSound = cfxZones.getStringFromZoneProperty(theZone, "beaconSound", "Radio_beacon_of_distress_on_121.ogg") --"Radio_beacon_of_distress_on_121,5_MHz.ogg"
	csarManager.pilotWeight = cfxZones.getNumberFromZoneProperty(theZone, "pilotWeight", 120) -- 120
	
	csarManager.rescueScore = cfxZones.getNumberFromZoneProperty(theZone, "rescueScore", 100)
	
	csarManager.actionSound = cfxZones.getStringFromZoneProperty(theZone, "actionSound", "Quest Snare 3.wav")
	csarManager.vectoring = cfxZones.getBoolFromZoneProperty(theZone, "vectoring", true)
	
	-- add own troop carriers 
	if cfxZones.hasProperty(theZone, "troopCarriers") then 
		local tc = cfxZones.getStringFromZoneProperty(theZone, "troopCarriers", "UH-1D")
		tc = dcsCommon.splitString(tc, ",")
		csarManager.troopCarriers = dcsCommon.trimArray(tc)
		if csarManager.verbose then 
			trigger.action.outText("+++casr: redefined troop carriers to types:", 30)
			for idx, aType in pairs(csarManager.troopCarriers) do 
				trigger.action.outText(aType, 30)
			end
		end
	end
	
	if csarManager.verbose then 
		trigger.action.outText("+++csar: read config", 30)
	end 
end


function csarManager.start()
	-- make sure we have loaded all relevant libraries 
	if not dcsCommon.libCheck("cfx CSAR", csarManager.requiredLibs) then 
		trigger.action.outText("cf/x CSAR aborted: missing libraries", 30)
		return false 
	end

	-- read config
	csarManager.readConfigZone()

	-- install callbacks for helo-relevant events
	dcsCommon.addEventHandler(csarManager.somethingHappened, csarManager.preProcessor, csarManager.postProcessor)

	-- now iterate through all player groups and install the CSAR Menu
	
	local allPlayerGroups = cfxPlayerGroups -- cfxPlayerGroups is a global, don't fuck with it! 
	-- contains per group a player record, use prime unit to access player's unit 
	for gname, pgroup in pairs(allPlayerGroups) do 
		local aUnit = pgroup.primeUnit -- get prime unit of that group
		csarManager.setCommsMenu(aUnit)
	end
	-- now install the new group notifier for new groups so we can remove and add CSAR menus 
	cfxPlayer.addMonitor(csarManager.playerChangeEvent)

	-- now scan all zones that are CSAR drop-off for quick access
	csarManager.processCSARBASE()
	
	-- now scan all zones to create ME-placed CSAR missions
	-- and populate the available mission.
	csarManager.processCSARZones()
	
	-- now call update so we can monitor progress of all helos, and alert them
	-- when they are close to a CSAR
	csarManager.update()

	-- say hi!
	trigger.action.outText("cf/x CSAR v" .. csarManager.version .. " started", 30)
	return true 
end

-- let's get rolling
if not csarManager.start() then 
	csarManager = nil
end


--[[--
	improvements
	- need to stay on ground for x seconds to load troops 
	- hot lz
	- hover recover 
	- limit on troops aboard for transport
	- delay for drop-off 
	
	- csar when: always, only on eject, 
	
	- repair o'clock 
	
	- nearest csarBase
	- red/blue csarbases 
	- weight 
	
	- compatibility: side/owner - make sure it is compatible 
	  with FARP, and landing on a FARP with opposition ownership 
	  will not disembark
	  
	- suppress multi smoke 
	
	- when unloading one by menu, update weight!!!
	
	-- allow neutral pick-up
	
	-- allow any airfied to be csarsafe by default, no longer requires csarbase
	-- get vector to closes csarbase 
	
--]]--