--------------------------------------------------------------------------------
--  Copyright (c) 2012-2014 Sierra Wireless.
--  All rights reserved. This program and the accompanying materials
--  are made available under the terms of the Eclipse Public License v1.0
--  which accompanies this distribution, and is available at
--  http://www.eclipse.org/legal/epl-v10.html
--
--  Contributors:
--       Kevin KIN-FOO <kkinfoo@sierrawireless.com>
--           - initial API and implementation and initial documentation
--------------------------------------------------------------------------------

--
-- Load documentation generator and update its path
--
local templateengine  = require 'templateengine'
for name, def in pairs( require 'template.utils' ) do
  templateengine.env [ name ] = def
end

-- Load documentation extractor and set handled languages
local lddextractor = require 'lddextractor'

local M = {}
M.defaultsitemainpagename = 'index'

function M.generatedocforfiles(filenames, cssname,noheuristic)
  if not filenames then return nil, 'No files provided.' end
  --
  -- Generate API model elements for all files
  --
  local generatedfiles = {}
  local wrongfiles = {}
  for _, filename in pairs( filenames ) do
    -- Load file content
    local file, error = io.open(filename, 'r')
    if not file then return nil, 'Unable to read "'..filename..'"\n'..err end
    local code = file:read('*all')
    file:close()
    -- Get module for current file
    local apimodule, err = lddextractor.generateapimodule(filename, code,noheuristic)

    -- Handle modules with module name
    if  apimodule and apimodule.name then
      generatedfiles[ apimodule.name ] = apimodule
    elseif not apimodule then
      -- Track faulty files
      table.insert(wrongfiles, 'Unable to extract comments from "'..filename..'".\n'..err)
    elseif not apimodule.name then
      -- Do not generate documentation for unnamed modules
      table.insert(wrongfiles, 'Unable to create documentation for "'..filename..'", no module name provided.')
    end
  end
  --
  -- Defining index, which will summarize all modules
  --
  local index = {
    modules = generatedfiles,
    name = M.defaultsitemainpagename,
    tag='index'
  }
  generatedfiles[ M.defaultsitemainpagename ] = index

  --
  -- Define page cursor
  --
  local page = {
    currentmodule = nil,
    headers = { [[<link rel="stylesheet" href="]].. cssname ..[[" type="text/css"/>]] },
    modules = generatedfiles,
    tag = 'page'
  }

  --
  -- Iterate over modules, generating complete doc pages
  --
  for _, module in pairs( generatedfiles ) do
    -- Update current cursor page
    page.currentmodule = module
    -- Generate page
    local content, error = templateengine.applytemplate(page)
    if not content then return nil, error end
    module.body = content
  end
  return generatedfiles, wrongfiles
end
return M