'use strict';

const playerArrayContains = require('./util').playerArrayContains;

const WHITESPACE = ' ';

const VehicleClasses = Object.freeze({
  LIGHT: 'Leicht',
  HEAVY: 'Schwer',
  AIR: 'Flug',
  UNKNOWN: 'Unbekannt',
});

const parseWarLog = (lineArray, war) => {
  const NAME_TOO_LONG_ERROR = 'Error: ENAMETOOLONG: name too long, open \'';

  const stats = {
    war: war,
    clean: [],
    budget: [],
    points: [],
    kills: [],
    vehicles: [],
    respawn: [],
    revive: [],
    flag: [],
    transport: [],
    players: [],
  };

  const VEHICLE_BLACKLIST = [
    'Prowler (Unbewaffnet)', 'Prowler (Bewaffnet)', 'Hunter',
    'HEMTT Transporter', 'HEMTT Transporter (abgedeckt)', 'HEMTT SanitÀtsfahrzeug',
    'Remote Designator [NATO]', 'UGV Stomper',
    'Qilin (Unbewaffnet)', 'Qilin (Bewaffnet)', 'Ifrit',
    'Tempest-Transporter', 'Tempest-Transporter (abgedeckt)', 'Tempest SanitÀtsfahrzeug',
    'Remote Designator [CSAT]', 'UBF Saif',
    'Quad Bike', 'HuntIR',
  ];

  const addPlayerIfNotExists = (inputPlayer, steamUUID) => {
    const player = getPlayerAndFractionFromString(inputPlayer);
    if (player && player.name && player.fraction && !playerArrayContains(stats.players, player)) {
      player['warId'] = war._id;
      player['steamUUID'] = steamUUID;
      stats.players.push(player);
    }
  };

  lineArray.some((line) => {
    /**
     * sanitize nameTooLongError coming up in first line
     */
    if (line.includes(NAME_TOO_LONG_ERROR)) {
      line = line.substring(line.indexOf(NAME_TOO_LONG_ERROR) + NAME_TOO_LONG_ERROR.length);
    }

    if (line.includes('(Abschuss)')) {
      /**
       * KILLS & VEHICLE KILLS
       */
      stats.clean.push(line);

      const shooterString = line.substring(line.lastIndexOf(' von: ') + 6, line.lastIndexOf('."'));
      const shooter = getPlayerAndFractionFromString(shooterString);

      if (line.includes('Fahrzeug:')) {
        const targetString = line.substring(line.lastIndexOf(' --- Fahrzeug: ') + 15, line.lastIndexOf(' von:'));
        const target = getVehicleAndFractionFromString(targetString);
        if (target && shooter && target.fraction !== shooter.fraction) {
          stats.vehicles.push({
            war: war._id,
            time: getFullTimeDate(war.date, line.split(WHITESPACE)[5]),
            shooter: shooter ? shooter.name : null,
            target: target ? target.name : null,
            fraction: shooter ? shooter.fraction : 'NONE',
            vehicleClass: target.vehicleClass,
          });
        }
      } else {
        const targetString = line.substring(line.lastIndexOf(' --- ') + 5, line.lastIndexOf(' von:'));
        const target = getPlayerAndFractionFromString(targetString);
        stats.kills.push({
          war: war._id,
          time: getFullTimeDate(war.date, line.split(WHITESPACE)[5]),
          shooter: shooter ? shooter.name : null,
          target: target ? target.name : null,
          friendlyFire: shooter ? target.fraction === shooter.fraction : false,
          fraction: shooter ? shooter.fraction : 'NONE',
        });
      }
    } else if (line.includes('(Budget)')) {
      /**
       * BUDGET
       */
      stats.clean.push(line);
      const budg = line.split(WHITESPACE);
      if (line.includes('Startbudget')) {
        stats.war['budgetBlufor'] = transformMoneyString(budg[9]);
        stats.war['budgetOpfor'] = transformMoneyString(budg[12].slice(0, -1));

        // this date needs to be assigned in first place !important
        const dateString = budg[0].slice(0, -1).split('/').map((s) => parseInt(s));
        stats.war.date = new Date(dateString[0], dateString[1] - 1, dateString[2]);
      } else if (line.includes('Endbudget')) {
        stats.war['endBudgetBlufor'] = transformMoneyString(budg[9]);
        stats.war['endBudgetOpfor'] = transformMoneyString(budg[12].slice(0, -2));
        stats.war.endDate = getFullTimeDate(war.date, budg[5]);
      } else {
        if (line.includes('Respawn von ')) {
          /**
           * RESPAWN
           */
          const playerName = line.substring(line.lastIndexOf('Respawn von ') + 12, line.lastIndexOf('"'));
          stats.respawn.push(getRespawnEntry(budg, playerName, war._id, war.date));
        }
        stats.budget.push(getBudgetEntry(budg, war._id, war.date));
      }
    } else if (line.includes('(Fahne)') && !line.includes('Dominator')) {
      /**
       * FLAG
       */
      stats.clean.push(line);
      const playerName = line.substring(line.lastIndexOf('rt von ') + 7).slice(0, -2);
      const flagFraction = line.includes('NATO Flagge') ? 'BLUFOR' : 'OPFOR';
      const capture = !!line.includes('Flagge erobert');

      stats.flag.push({
        war: war._id,
        time: getFullTimeDate(war.date, line.split(WHITESPACE)[5]),
        player: playerName,
        flagFraction: flagFraction,
        capture: capture,
      });
    } else if (line.includes('(Punkte)')) {
      /**
       * POINTS
       */
      stats.clean.push(line);
      const pt = line.split(WHITESPACE);

      if (line.includes('Endpunktestand')) {
        stats.war['ptBlufor'] = parseInt(pt[9]);
        stats.war['ptOpfor'] = parseInt(pt[12].slice(0, -1));
        // EXIT LOOP
        return true;
      } else {
        stats.points.push(getPointsEntry(pt, line, war._id, war.date));
      }
    } else if (line.includes('(Revive)')) {
      /**
       * REVIVE
       */
      stats.clean.push(line);
      const stabilized = !!line.includes('stabilisiert."');
      const medicName = line.substring(line.lastIndexOf('wurde von ') + 10,
        line.lastIndexOf(stabilized ? ' stabilisiert' : ' wiederbelebt'));
      const medic = getPlayerAndFractionFromString(medicName);
      const patientName = line.substring(line.lastIndexOf('--- ') + 4, line.lastIndexOf(' wurde von'));
      const patient = getPlayerAndFractionFromString(patientName);

      stats.revive.push({
        war: war._id,
        time: getFullTimeDate(war.date, line.split(WHITESPACE)[5]),
        stabilized: stabilized,
        medic: medic.name,
        patient: patient.name,
        fraction: medic.fraction,
      });
    } else if (line.includes('(Transport)')) {
      /**
       * TRANSPORT
       */
      stats.clean.push(line);
      const driverString = line.substring(line.lastIndexOf('wurde von ') + 10, line.lastIndexOf(' eingeflogen'));
      const driver = getPlayerAndFractionFromString(driverString);
      const passengerString = line.substring(line.lastIndexOf('--- ') + 3, line.lastIndexOf(' wurde von'));
      const passenger = getPlayerAndFractionFromString(passengerString);
      const distance = parseInt(line.substring(line.lastIndexOf('eingeflogen (') + 13, line.lastIndexOf('m)') - 1));

      stats.transport.push({
        war: war._id,
        time: getFullTimeDate(war.date, line.split(WHITESPACE)[5]),
        driver: driver ? driver.name : null,
        passenger: passenger ? passenger.name : null,
        fraction: driver ? driver.fraction : 'NONE',
        distance: distance,
      });
    } else if (line.includes('(Fraktionsuebersicht)')) {
      /**
       * PLAYERS
       */
      const playerString = line.substring(line.lastIndexOf('--- ') + 4, line.lastIndexOf(', PUID'));
      const playerUUID = line.substring(line.lastIndexOf('PUID ') + 5, line.lastIndexOf('"'));
      addPlayerIfNotExists(playerString, playerUUID);
    }
  });

  for (let i = 0; i < stats.players.length; i++) {
    const playerName = stats.players[i].name;
    stats.players[i]['respawn'] = stats.respawn.filter((res) => res.player === playerName).length;

    stats.players[i]['kill'] = stats.kills.filter((kill) => kill.shooter === playerName && !kill.friendlyFire).length;

    // TODO: use vehicle class description from enum
    stats.players[i]['vehicleLight'] = stats.vehicles.filter(
      (vehicle) => vehicle.shooter === playerName && vehicle.vehicleClass === 'LIGHT' &&
        VEHICLE_BLACKLIST.indexOf(vehicle.target) < 0).length;

    stats.players[i]['vehicleHeavy'] = stats.vehicles.filter(
      (vehicle) => vehicle.shooter === playerName && vehicle.vehicleClass === 'HEAVY' &&
        VEHICLE_BLACKLIST.indexOf(vehicle.target) < 0).length;

    stats.players[i]['vehicleAir'] = stats.vehicles.filter(
      (vehicle) => vehicle.shooter === playerName && vehicle.vehicleClass === 'AIR' &&
        VEHICLE_BLACKLIST.indexOf(vehicle.target) < 0).length;

    stats.players[i]['friendlyFire'] = stats.kills.filter(
      (kill) => kill.shooter === playerName && kill.friendlyFire).length;

    stats.players[i]['death'] = stats.kills.filter((kill) => kill.target === playerName).length;

    stats.players[i]['revive'] = stats.revive.filter((rev) => rev.medic === playerName && !rev.stabilized).length;

    stats.players[i]['flagTouch'] = stats.flag.filter((flag) => flag.player === playerName).length;

    stats.players[i]['sort'] = stats.players[i]['kill'] + stats.players[i]['revive'] + stats.players[i]['flagTouch']
      - stats.players[i]['friendlyFire'] - stats.players[i]['death'] - stats.players[i]['respawn'];
  }

  stats.war.playersBlufor = stats.players.filter((player) => player.fraction === 'BLUFOR').length;
  stats.war.playersOpfor = stats.players.filter((player) => player.fraction === 'OPFOR').length;

  return stats;
};

const getRespawnEntry = (respawn, playerName, warId, warDate) => {
  return {
    war: warId,
    time: getFullTimeDate(warDate, respawn[5]),
    player: playerName,
  };
};

const getPointsEntry = (pt, line, warId, warDate) => {
  return {
    war: warId,
    time: getFullTimeDate(warDate, pt[5]),
    ptBlufor: parseInt(pt[10]),
    ptOpfor: parseInt(pt[13].slice(0, -3)),
    fraction: line.includes('Kein Dominator') ? 'NONE' : line.includes('NATO +1') ? 'BLUFOR' : 'OPFOR',
  };
};

const getBudgetEntry = (budg, warId, warDate) => {
  return {
    war: warId,
    time: getFullTimeDate(warDate, budg[5]),
    fraction: budg[7] === 'NATO' ? 'BLUFOR' : 'OPFOR',
    oldBudget: transformMoneyString(budg[9]),
    newBudget: transformMoneyString(budg[12]),
  };
};

const getPlayerAndFractionFromString = (nameAndFractionString) => {
  const nameArray = nameAndFractionString.split(WHITESPACE);
  const fraction = nameArray[nameArray.length - 1] !== '(ENEMY)' ?
    nameArray[nameArray.length - 1] === '(WEST)' ?
      'BLUFOR' : 'OPFOR' :
    undefined;
  const name = nameAndFractionString.substring(0, nameAndFractionString.indexOf(nameArray[nameArray.length - 1]) - 1);
  // do not return player for 'Selbstverschulden' or 'Error: No unit'
  if (name && name !== 'Error: No unit') {
    return {name: name, fraction: fraction};
  }
};

const getVehicleAndFractionFromString = (nameClassFractionString) => {
  const nameArray = nameClassFractionString.trim().split(WHITESPACE);

  const vehicleFraction = nameArray[nameArray.length - 1];
  nameArray.pop();
  const vehicleClassString = nameArray[nameArray.length - 1].replace('(', '').replace(')', '');
  nameArray.pop();
  const vehicleName = nameArray.join(WHITESPACE);

  // skip logging here - this is some basic equipment identifier (i.e. parachute)
  if (vehicleFraction === 'OPF_F' || vehicleFraction === 'BLU_F' || vehicleClassString === VehicleClasses.UNKNOWN) {
    return;
  }

  const fraction = vehicleFraction === '(OPT_NATO)' || vehicleFraction === '(OPT_NATO_T)' ? 'BLUFOR' : 'OPFOR';

  let vehicleClass;
  for (const key in VehicleClasses) {
    if (VehicleClasses.hasOwnProperty(key) && VehicleClasses[key] === vehicleClassString) {
      vehicleClass = key;
    }
  }

  return {
    name: vehicleName,
    fraction: fraction,
    vehicleClass: vehicleClass,
  };
};

const transformMoneyString = (budgetString) => {
  if (!budgetString.includes('e+')) {
    return parseInt(budgetString);
  }
  const budget = budgetString.split('e+');
  return Math.round(parseFloat(budget[0]) * Math.pow(10, parseInt(budget[1])));
};

const getFullTimeDate = (date, timeString) => {
  const returnDate = new Date(date);
  const time = timeString.split(':');
  returnDate.setHours(time[0]);
  returnDate.setMinutes(time[1]);
  return returnDate;
};

module.exports = parseWarLog;