import { LatLng } from "leaflet";
import { getApp } from "../../olympusapp";
import { GAME_MASTER } from "../../constants/constants";
import { UnitBlueprint } from "../../interfaces";

export abstract class UnitDatabase {
  blueprints: { [key: string]: UnitBlueprint } = {};
  #url: string;

  constructor(url: string = "") {
    this.#url = url;
    this.load(() => {});
  }

  load(callback: CallableFunction) {
    if (this.#url !== "") {
      var xhr = new XMLHttpRequest();
      xhr.open("GET", this.#url, true);
      xhr.setRequestHeader("Cache-Control", "no-cache, no-store, max-age=0");
      xhr.responseType = "json";
      xhr.onload = () => {
        var status = xhr.status;
        if (status === 200) {
          this.blueprints = xhr.response;
          callback();
        } else {
          console.error(`Error retrieving database from ${this.#url}`);
        }
      };
      xhr.send();
    }
  }

  abstract getCategory(): string;

  /* Gets a specific blueprint by name */
  getByName(name: string) {
    if (name in this.blueprints) return this.blueprints[name];
    return null;
  }

  /* Gets a specific blueprint by label */
  getByLabel(label: string) {
    for (let unit in this.blueprints) {
      if (this.blueprints[unit].label === label) return this.blueprints[unit];
    }
    return null;
  }

  getBlueprints(includeDisabled: boolean = false) {
    if (
      getApp().getMissionManager().getCommandModeOptions().commandMode ==
        GAME_MASTER ||
      !getApp().getMissionManager().getCommandModeOptions().restrictSpawns
    ) {
      var filteredBlueprints: { [key: string]: UnitBlueprint } = {};
      for (let unit in this.blueprints) {
        const blueprint = this.blueprints[unit];
        if (blueprint.enabled || includeDisabled)
          filteredBlueprints[unit] = blueprint;
      }
      return filteredBlueprints;
    } else {
      var filteredBlueprints: { [key: string]: UnitBlueprint } = {};
      for (let unit in this.blueprints) {
        const blueprint = this.blueprints[unit];
        if (
          (blueprint.enabled || includeDisabled) &&
          this.getSpawnPointsByName(blueprint.name) <=
            getApp().getMissionManager().getAvailableSpawnPoints() &&
          getApp()
            .getMissionManager()
            .getCommandModeOptions()
            .eras.includes(blueprint.era) &&
          (!getApp().getMissionManager().getCommandModeOptions()
            .restrictToCoalition ||
            blueprint.coalition ===
              getApp().getMissionManager().getCommandedCoalition() ||
            blueprint.coalition === undefined)
        ) {
          filteredBlueprints[unit] = blueprint;
        }
      }
      return filteredBlueprints;
    }
  }

  /* Returns a list of all possible roles in a database */
  getRoles() {
    var roles: string[] = [];
    var filteredBlueprints = this.getBlueprints();
    for (let unit in filteredBlueprints) {
      var loadouts = filteredBlueprints[unit].loadouts;
      if (loadouts) {
        for (let loadout of loadouts) {
          for (let role of loadout.roles) {
            if (role !== "" && !roles.includes(role)) roles.push(role);
          }
        }
      }
    }
    return roles;
  }

  /* Returns a list of all possible types in a database */
  getTypes(unitFilter?: CallableFunction) {
    var filteredBlueprints = this.getBlueprints();
    var types: string[] = [];
    for (let unit in filteredBlueprints) {
      if (
        typeof unitFilter === "function" &&
        !unitFilter(filteredBlueprints[unit])
      )
        continue;
      var type = filteredBlueprints[unit].type;
      if (type && type !== "" && !types.includes(type)) types.push(type);
    }
    return types;
  }

  /* Returns a list of all possible eras in a database */
  getEras() {
    var filteredBlueprints = this.getBlueprints();
    var eras: string[] = [];
    for (let unit in filteredBlueprints) {
      var era = filteredBlueprints[unit].era;
      if (era && era !== "" && !eras.includes(era)) eras.push(era);
    }
    return eras;
  }

  /* Get all blueprints by range */
  getByRange(range: string) {
    var filteredBlueprints = this.getBlueprints();
    var unitswithrange = [];
    var minRange = 0;
    var maxRange = 0;

    if (range === "Short range") {
      minRange = 0;
      maxRange = 10000;
    } else if (range === "Medium range") {
      minRange = 10000;
      maxRange = 100000;
    } else {
      minRange = 100000;
      maxRange = 999999;
    }

    for (let unit in filteredBlueprints) {
      var engagementRange = filteredBlueprints[unit].engagementRange;
      if (engagementRange !== undefined) {
        if (engagementRange >= minRange && engagementRange < maxRange) {
          unitswithrange.push(filteredBlueprints[unit]);
        }
      }
    }
    return unitswithrange;
  }

  /* Get all blueprints by type */
  getByType(type: string) {
    var filteredBlueprints = this.getBlueprints();
    var units = [];
    for (let unit in filteredBlueprints) {
      if (filteredBlueprints[unit].type === type) {
        units.push(filteredBlueprints[unit]);
      }
    }
    return units;
  }

  /* Get all blueprints by role */
  getByRole(role: string) {
    var filteredBlueprints = this.getBlueprints();
    var units = [];
    for (let unit in filteredBlueprints) {
      var loadouts = filteredBlueprints[unit].loadouts;
      if (loadouts) {
        for (let loadout of loadouts) {
          if (
            loadout.roles.includes(role) ||
            loadout.roles.includes(role.toLowerCase())
          ) {
            units.push(filteredBlueprints[unit]);
            break;
          }
        }
      }
    }
    return units;
  }

  /* Get the names of all the loadouts for a specific unit and for a specific role */
  getLoadoutNamesByRole(name: string, role: string) {
    var filteredBlueprints = this.getBlueprints();
    var loadoutsByRole = [];
    var loadouts = filteredBlueprints[name].loadouts;
    if (loadouts) {
      for (let loadout of loadouts) {
        if (loadout.roles.includes(role) || loadout.roles.includes("")) {
          loadoutsByRole.push(loadout.name);
        }
      }
    }
    return loadoutsByRole;
  }

  /* Get the livery names for a specific unit */
  getLiveryNamesByName(name: string) {
    var liveries = this.blueprints[name].liveries;
    if (liveries !== undefined) return Object.values(liveries);
    else return [];
  }

  /* Get the loadout content from the unit name and loadout name */
  getLoadoutByName(name: string, loadoutName: string) {
    var loadouts = this.blueprints[name].loadouts;
    if (loadouts) {
      for (let loadout of loadouts) {
        if (loadout.name === loadoutName) return loadout;
      }
    }
    return null;
  }

  getSpawnPointsByLabel(label: string) {
    var blueprint = this.getByLabel(label);
    if (blueprint) return this.getSpawnPointsByName(blueprint.name);
    else return Infinity;
  }

  getSpawnPointsByName(name: string) {
    return Infinity;
  }

  getUnkownUnit(name: string): UnitBlueprint {
    return {
      name: name,
      enabled: true,
      coalition: "neutral",
      era: "N/A",
      label: name,
      shortLabel: "",
    };
  }
}