import { CommonAnim } from "./battle-anims";
import { CommonAnimPhase, DamagePhase, MessagePhase, MovePhase } from "./battle-phases";
import { getPokemonMessage } from "./messages";
import Pokemon from "./pokemon";
import { Stat } from "./pokemon-stat";
import * as Utils from "./utils";

export enum BattleTagType {
  NONE,
  CONFUSED,
  FRENZY,
  FLYING,
  UNDERGROUND
}

export enum BattleTagLapseType {
  FAINT,
  MOVE,
  MOVE_EFFECT,
  TURN_END,
  CUSTOM
}

export class BattleTag {
  public tagType: BattleTagType;
  public lapseType: BattleTagLapseType;
  public turnCount: integer;

  constructor(tagType: BattleTagType, lapseType: BattleTagLapseType, turnCount: integer) {
    this.tagType = tagType;
    this.lapseType = lapseType;
    this.turnCount = turnCount;
  }

  onAdd(pokemon: Pokemon): void { }

  onRemove(pokemon: Pokemon): void { }

  onOverlap(pokemon: Pokemon): void { }

  lapse(pokemon: Pokemon): boolean {
    return !!--this.turnCount;
  }
}

export class PseudoStatusTag extends BattleTag {
  constructor(tagType: BattleTagType, turnCount: integer) {
    super(tagType, BattleTagLapseType.MOVE, turnCount);
  }
}

export class ConfusedTag extends PseudoStatusTag {
  constructor(tagType: BattleTagType, turnCount: integer) {
    super(tagType, turnCount);
  }

  onAdd(pokemon: Pokemon): void {
    super.onAdd(pokemon);
    
    pokemon.scene.unshiftPhase(new CommonAnimPhase(pokemon.scene, pokemon.isPlayer(), CommonAnim.CONFUSION));
    pokemon.scene.unshiftPhase(new MessagePhase(pokemon.scene, getPokemonMessage(pokemon, ' became\nconfused!')));
  }

  onRemove(pokemon: Pokemon): void {
    super.onRemove(pokemon);
    
    pokemon.scene.unshiftPhase(new MessagePhase(pokemon.scene, getPokemonMessage(pokemon, ' snapped\nout of confusion!')));
  }

  onOverlap(pokemon: Pokemon): void {
    super.onOverlap(pokemon);

    pokemon.scene.unshiftPhase(new MessagePhase(pokemon.scene, getPokemonMessage(pokemon, ' is\nalready confused!')));
  }

  lapse(pokemon: Pokemon): boolean {
    const ret = super.lapse(pokemon);

    if (ret) {
      pokemon.scene.unshiftPhase(new MessagePhase(pokemon.scene, getPokemonMessage(pokemon, ' is\nconfused!')));
      pokemon.scene.unshiftPhase(new CommonAnimPhase(pokemon.scene, pokemon.isPlayer(), CommonAnim.CONFUSION));

      if (Utils.randInt(2)) {
        const atk = pokemon.getBattleStat(Stat.ATK);
        const def = pokemon.getBattleStat(Stat.DEF);
        const damage = Math.ceil(((((2 * pokemon.level / 5 + 2) * 40 * atk / def) / 50) + 2) * ((Utils.randInt(15) + 85) / 100));
        pokemon.hp = Math.max(pokemon.hp - damage, 0);
        pokemon.scene.unshiftPhase(new MessagePhase(pokemon.scene, 'It hurt itself in its\nconfusion!'));
        pokemon.scene.unshiftPhase(new DamagePhase(pokemon.scene, pokemon.isPlayer(), damage));
        (pokemon.scene.getCurrentPhase() as MovePhase).cancel();
      }
    }
    
    return ret;
  }
}

export class HideSpriteTag extends BattleTag {
  constructor(tagType: BattleTagType, turnCount: integer) {
    super(tagType, BattleTagLapseType.MOVE_EFFECT, turnCount);
  }

  onAdd(pokemon: Pokemon): void {
    super.onAdd(pokemon);
    
    pokemon.setVisible(false);
  }

  onRemove(pokemon: Pokemon): void {
    // Wait 2 frames before setting visible for battle animations that don't immediately show the sprite invisible
    pokemon.scene.tweens.addCounter({
      duration: 2,
      useFrames: true,
      onComplete: () => pokemon.setVisible(true)
    });
  }
}

export function getBattleTag(tagType: BattleTagType, turnCount: integer): BattleTag {
  switch (tagType) {
    case BattleTagType.CONFUSED:
      return new ConfusedTag(tagType, turnCount);
    case BattleTagType.FLYING:
    case BattleTagType.UNDERGROUND:
      return new HideSpriteTag(tagType, turnCount);
    default:
        return new BattleTag(tagType, BattleTagLapseType.CUSTOM, turnCount);
  }
}