package funkin.save.migrator;

import funkin.save.Save;
import funkin.save.migrator.RawSaveData_v1_0_0;
import thx.semver.Version;
import funkin.util.VersionUtil;

@:nullSafety
class SaveDataMigrator
{
  /**
   * Migrate from one 2.x version to another.
   */
  public static function migrate(inputData:Dynamic):Save
  {
    var version:Null<thx.semver.Version> = VersionUtil.parseVersion(inputData?.version ?? null);

    if (version == null)
    {
      trace('[SAVE] No version found in save data! Returning blank data.');
      trace(inputData);
      return new Save();
    }
    else
    {
      if (VersionUtil.validateVersion(version, Save.SAVE_DATA_VERSION_RULE))
      {
        // Simply cast the structured data.
        var save:Save = inputData;
        return save;
      }
      else
      {
        trace('[SAVE] Invalid save data version! Returning blank data.');
        trace(inputData);
        return new Save();
      }
    }
  }

  /**
   * Migrate from 1.x to the latest version.
   */
  public static function migrateFromLegacy(inputData:Dynamic):Save
  {
    var inputSaveData:RawSaveData_v1_0_0 = cast inputData;

    var result:Save = new Save();

    result.volume = inputSaveData.volume;
    result.mute = inputSaveData.mute;

    result.ngSessionId = inputSaveData.sessionId;

    // TODO: Port over the save data from the legacy save data format.
    migrateLegacyScores(result, inputSaveData);

    migrateLegacyControls(result, inputSaveData);

    return result;
  }

  static function migrateLegacyScores(result:Save, inputSaveData:RawSaveData_v1_0_0):Void
  {
    if (inputSaveData.songCompletion == null)
    {
      inputSaveData.songCompletion = [];
    }

    if (inputSaveData.songScores == null)
    {
      inputSaveData.songScores = [];
    }

    migrateLegacyLevelScore(result, inputSaveData, 'week0');
    migrateLegacyLevelScore(result, inputSaveData, 'week1');
    migrateLegacyLevelScore(result, inputSaveData, 'week2');
    migrateLegacyLevelScore(result, inputSaveData, 'week3');
    migrateLegacyLevelScore(result, inputSaveData, 'week4');
    migrateLegacyLevelScore(result, inputSaveData, 'week5');
    migrateLegacyLevelScore(result, inputSaveData, 'week6');
    migrateLegacyLevelScore(result, inputSaveData, 'week7');

    migrateLegacySongScore(result, inputSaveData, ['tutorial', 'Tutorial']);

    migrateLegacySongScore(result, inputSaveData, ['bopeebo', 'Bopeebo']);
    migrateLegacySongScore(result, inputSaveData, ['fresh', 'Fresh']);
    migrateLegacySongScore(result, inputSaveData, ['dadbattle', 'Dadbattle']);

    migrateLegacySongScore(result, inputSaveData, ['monster', 'Monster']);
    migrateLegacySongScore(result, inputSaveData, ['south', 'South']);
    migrateLegacySongScore(result, inputSaveData, ['spookeez', 'Spookeez']);

    migrateLegacySongScore(result, inputSaveData, ['pico', 'Pico']);
    migrateLegacySongScore(result, inputSaveData, ['philly-nice', 'Philly', 'philly', 'Philly-Nice']);
    migrateLegacySongScore(result, inputSaveData, ['blammed', 'Blammed']);

    migrateLegacySongScore(result, inputSaveData, ['satin-panties', 'Satin-Panties']);
    migrateLegacySongScore(result, inputSaveData, ['high', 'High']);
    migrateLegacySongScore(result, inputSaveData, ['milf', 'Milf', 'MILF']);

    migrateLegacySongScore(result, inputSaveData, ['cocoa', 'Cocoa']);
    migrateLegacySongScore(result, inputSaveData, ['eggnog', 'Eggnog']);
    migrateLegacySongScore(result, inputSaveData, ['winter-horrorland', 'Winter-Horrorland']);

    migrateLegacySongScore(result, inputSaveData, ['senpai', 'Senpai']);
    migrateLegacySongScore(result, inputSaveData, ['roses', 'Roses']);
    migrateLegacySongScore(result, inputSaveData, ['thorns', 'Thorns']);

    migrateLegacySongScore(result, inputSaveData, ['ugh', 'Ugh']);
    migrateLegacySongScore(result, inputSaveData, ['guns', 'Guns']);
    migrateLegacySongScore(result, inputSaveData, ['stress', 'Stress']);
  }

  static function migrateLegacyLevelScore(result:Save, inputSaveData:RawSaveData_v1_0_0, levelId:String):Void
  {
    var scoreDataEasy:SaveScoreData =
      {
        score: inputSaveData.songScores.get('${levelId}-easy') ?? 0,
        accuracy: inputSaveData.songCompletion.get('${levelId}-easy') ?? 0.0,
        tallies:
          {
            killer: 0,
            sick: 0,
            good: 0,
            bad: 0,
            shit: 0,
            missed: 0,
            combo: 0,
            maxCombo: 0,
            totalNotesHit: 0,
            totalNotes: 0,
          }
      };
    result.setLevelScore(levelId, 'easy', scoreDataEasy);

    var scoreDataNormal:SaveScoreData =
      {
        score: inputSaveData.songScores.get('${levelId}') ?? 0,
        accuracy: inputSaveData.songCompletion.get('${levelId}') ?? 0.0,
        tallies:
          {
            killer: 0,
            sick: 0,
            good: 0,
            bad: 0,
            shit: 0,
            missed: 0,
            combo: 0,
            maxCombo: 0,
            totalNotesHit: 0,
            totalNotes: 0,
          }
      };
    result.setLevelScore(levelId, 'normal', scoreDataNormal);

    var scoreDataHard:SaveScoreData =
      {
        score: inputSaveData.songScores.get('${levelId}-hard') ?? 0,
        accuracy: inputSaveData.songCompletion.get('${levelId}-hard') ?? 0.0,
        tallies:
          {
            killer: 0,
            sick: 0,
            good: 0,
            bad: 0,
            shit: 0,
            missed: 0,
            combo: 0,
            maxCombo: 0,
            totalNotesHit: 0,
            totalNotes: 0,
          }
      };
    result.setLevelScore(levelId, 'hard', scoreDataHard);
  }

  static function migrateLegacySongScore(result:Save, inputSaveData:RawSaveData_v1_0_0, songIds:Array<String>):Void
  {
    var scoreDataEasy:SaveScoreData =
      {
        score: 0,
        accuracy: 0,
        tallies:
          {
            killer: 0,
            sick: 0,
            good: 0,
            bad: 0,
            shit: 0,
            missed: 0,
            combo: 0,
            maxCombo: 0,
            totalNotesHit: 0,
            totalNotes: 0,
          }
      };

    for (songId in songIds)
    {
      scoreDataEasy.score = Std.int(Math.max(scoreDataEasy.score, inputSaveData.songScores.get('${songId}-easy') ?? 0));
      scoreDataEasy.accuracy = Math.max(scoreDataEasy.accuracy, inputSaveData.songCompletion.get('${songId}-easy') ?? 0.0);
    }
    result.setSongScore(songIds[0], 'easy', scoreDataEasy);

    var scoreDataNormal:SaveScoreData =
      {
        score: 0,
        accuracy: 0,
        tallies:
          {
            killer: 0,
            sick: 0,
            good: 0,
            bad: 0,
            shit: 0,
            missed: 0,
            combo: 0,
            maxCombo: 0,
            totalNotesHit: 0,
            totalNotes: 0,
          }
      };

    for (songId in songIds)
    {
      scoreDataNormal.score = Std.int(Math.max(scoreDataNormal.score, inputSaveData.songScores.get('${songId}') ?? 0));
      scoreDataNormal.accuracy = Math.max(scoreDataNormal.accuracy, inputSaveData.songCompletion.get('${songId}') ?? 0.0);
    }
    result.setSongScore(songIds[0], 'normal', scoreDataNormal);

    var scoreDataHard:SaveScoreData =
      {
        score: 0,
        accuracy: 0,
        tallies:
          {
            killer: 0,
            sick: 0,
            good: 0,
            bad: 0,
            shit: 0,
            missed: 0,
            combo: 0,
            maxCombo: 0,
            totalNotesHit: 0,
            totalNotes: 0,
          }
      };

    for (songId in songIds)
    {
      scoreDataHard.score = Std.int(Math.max(scoreDataHard.score, inputSaveData.songScores.get('${songId}-hard') ?? 0));
      scoreDataHard.accuracy = Math.max(scoreDataHard.accuracy, inputSaveData.songCompletion.get('${songId}-hard') ?? 0.0);
    }
    result.setSongScore(songIds[0], 'hard', scoreDataHard);
  }

  static function migrateLegacyControls(result:Save, inputSaveData:RawSaveData_v1_0_0):Void
  {
    var p1Data = inputSaveData?.controls?.p1;
    if (p1Data != null)
    {
      migrateLegacyPlayerControls(result, 1, p1Data);
    }

    var p2Data = inputSaveData?.controls?.p2;
    if (p2Data != null)
    {
      migrateLegacyPlayerControls(result, 2, p2Data);
    }
  }

  static function migrateLegacyPlayerControls(result:Save, playerId:Int, controlsData:SavePlayerControlsData_v1_0_0):Void
  {
    var outputKeyControls:SaveControlsData =
      {
        ACCEPT: controlsData?.keys?.ACCEPT ?? null,
        BACK: controlsData?.keys?.BACK ?? null,
        CUTSCENE_ADVANCE: controlsData?.keys?.CUTSCENE_ADVANCE ?? null,
        CUTSCENE_SKIP: controlsData?.keys?.CUTSCENE_SKIP ?? null,
        NOTE_DOWN: controlsData?.keys?.NOTE_DOWN ?? null,
        NOTE_LEFT: controlsData?.keys?.NOTE_LEFT ?? null,
        NOTE_RIGHT: controlsData?.keys?.NOTE_RIGHT ?? null,
        NOTE_UP: controlsData?.keys?.NOTE_UP ?? null,
        PAUSE: controlsData?.keys?.PAUSE ?? null,
        RESET: controlsData?.keys?.RESET ?? null,
        UI_DOWN: controlsData?.keys?.UI_DOWN ?? null,
        UI_LEFT: controlsData?.keys?.UI_LEFT ?? null,
        UI_RIGHT: controlsData?.keys?.UI_RIGHT ?? null,
        UI_UP: controlsData?.keys?.UI_UP ?? null,
        VOLUME_DOWN: controlsData?.keys?.VOLUME_DOWN ?? null,
        VOLUME_MUTE: controlsData?.keys?.VOLUME_MUTE ?? null,
        VOLUME_UP: controlsData?.keys?.VOLUME_UP ?? null,
      };

    var outputPadControls:SaveControlsData =
      {
        ACCEPT: controlsData?.pad?.ACCEPT ?? null,
        BACK: controlsData?.pad?.BACK ?? null,
        CUTSCENE_ADVANCE: controlsData?.pad?.CUTSCENE_ADVANCE ?? null,
        CUTSCENE_SKIP: controlsData?.pad?.CUTSCENE_SKIP ?? null,
        NOTE_DOWN: controlsData?.pad?.NOTE_DOWN ?? null,
        NOTE_LEFT: controlsData?.pad?.NOTE_LEFT ?? null,
        NOTE_RIGHT: controlsData?.pad?.NOTE_RIGHT ?? null,
        NOTE_UP: controlsData?.pad?.NOTE_UP ?? null,
        PAUSE: controlsData?.pad?.PAUSE ?? null,
        RESET: controlsData?.pad?.RESET ?? null,
        UI_DOWN: controlsData?.pad?.UI_DOWN ?? null,
        UI_LEFT: controlsData?.pad?.UI_LEFT ?? null,
        UI_RIGHT: controlsData?.pad?.UI_RIGHT ?? null,
        UI_UP: controlsData?.pad?.UI_UP ?? null,
        VOLUME_DOWN: controlsData?.pad?.VOLUME_DOWN ?? null,
        VOLUME_MUTE: controlsData?.pad?.VOLUME_MUTE ?? null,
        VOLUME_UP: controlsData?.pad?.VOLUME_UP ?? null,
      };

    result.setControls(playerId, Keys, outputKeyControls);
    result.setControls(playerId, Gamepad(0), outputPadControls);
  }
}