import { Stat } from "#enums/stat";
import { TrappedTag } from "#app/data/battler-tags";
import { CommandPhase } from "#app/phases/command-phase";
import { MoveEndPhase } from "#app/phases/move-end-phase";
import { TurnInitPhase } from "#app/phases/turn-init-phase";
import { Abilities } from "#enums/abilities";
import { Moves } from "#enums/moves";
import { Species } from "#enums/species";
import GameManager from "#test/utils/gameManager";
import Phaser from "phaser";
import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";

describe("Moves - Octolock", () => {
  let phaserGame: Phaser.Game;
  let game: GameManager;

  beforeAll(() => {
    phaserGame = new Phaser.Game({
      type: Phaser.HEADLESS,
    });
  });

  afterEach(() => {
    game.phaseInterceptor.restoreOg();
  });

  beforeEach(() => {
    game = new GameManager(phaserGame);

    game.override.battleType("single")
      .enemySpecies(Species.RATTATA)
      .enemyMoveset(Moves.SPLASH)
      .enemyAbility(Abilities.BALL_FETCH)
      .startingLevel(2000)
      .moveset([ Moves.OCTOLOCK, Moves.SPLASH ])
      .ability(Abilities.BALL_FETCH);
  });

  it("lowers DEF and SPDEF stat stages of the target Pokemon by 1 each turn", async () => {
    await game.classicMode.startBattle([ Species.GRAPPLOCT ]);

    const enemyPokemon = game.scene.getEnemyPokemon()!;

    // use Octolock and advance to init phase of next turn to check for stat changes
    game.move.select(Moves.OCTOLOCK);
    await game.phaseInterceptor.to(TurnInitPhase);

    expect(enemyPokemon.getStatStage(Stat.DEF)).toBe(-1);
    expect(enemyPokemon.getStatStage(Stat.SPDEF)).toBe(-1);

    // take a second turn to make sure stat changes occur again
    await game.phaseInterceptor.to(CommandPhase);
    game.move.select(Moves.SPLASH);

    await game.phaseInterceptor.to(TurnInitPhase);
    expect(enemyPokemon.getStatStage(Stat.DEF)).toBe(-2);
    expect(enemyPokemon.getStatStage(Stat.SPDEF)).toBe(-2);
  });

  it("if target pokemon has BIG_PECKS, should only lower SPDEF stat stage by 1", async () => {
    game.override.enemyAbility(Abilities.BIG_PECKS);
    await game.classicMode.startBattle([ Species.GRAPPLOCT ]);

    const enemyPokemon = game.scene.getEnemyPokemon()!;

    // use Octolock and advance to init phase of next turn to check for stat changes
    game.move.select(Moves.OCTOLOCK);
    await game.phaseInterceptor.to(TurnInitPhase);

    expect(enemyPokemon.getStatStage(Stat.DEF)).toBe(0);
    expect(enemyPokemon.getStatStage(Stat.SPDEF)).toBe(-1);
  });

  it("if target pokemon has WHITE_SMOKE, should not reduce any stat stages", async () => {
    game.override.enemyAbility(Abilities.WHITE_SMOKE);
    await game.classicMode.startBattle([ Species.GRAPPLOCT ]);

    const enemyPokemon = game.scene.getEnemyPokemon()!;

    // use Octolock and advance to init phase of next turn to check for stat changes
    game.move.select(Moves.OCTOLOCK);
    await game.phaseInterceptor.to(TurnInitPhase);

    expect(enemyPokemon.getStatStage(Stat.DEF)).toBe(0);
    expect(enemyPokemon.getStatStage(Stat.SPDEF)).toBe(0);
  });

  it("if target pokemon has CLEAR_BODY, should not reduce any stat stages", async () => {
    game.override.enemyAbility(Abilities.CLEAR_BODY);
    await game.classicMode.startBattle([ Species.GRAPPLOCT ]);

    const enemyPokemon = game.scene.getEnemyPokemon()!;

    // use Octolock and advance to init phase of next turn to check for stat changes
    game.move.select(Moves.OCTOLOCK);
    await game.phaseInterceptor.to(TurnInitPhase);

    expect(enemyPokemon.getStatStage(Stat.DEF)).toBe(0);
    expect(enemyPokemon.getStatStage(Stat.SPDEF)).toBe(0);
  });

  it("traps the target pokemon", async () => {
    await game.classicMode.startBattle([ Species.GRAPPLOCT ]);

    const enemyPokemon = game.scene.getEnemyPokemon()!;

    // before Octolock - enemy should not be trapped
    expect(enemyPokemon.findTag(t => t instanceof TrappedTag)).toBeUndefined();

    game.move.select(Moves.OCTOLOCK);

    // after Octolock - enemy should be trapped
    await game.phaseInterceptor.to(MoveEndPhase);
    expect(enemyPokemon.findTag(t => t instanceof TrappedTag)).toBeDefined();
  });
});