import { StatBoosterModifier } from "#app/modifier/modifier";
import { NumberHolder, randItem } from "#app/utils";
import { Species } from "#enums/species";
import { Stat } from "#enums/stat";
import GameManager from "#test/testUtils/gameManager";
import Phase from "phaser";
import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";

describe("Items - Eviolite", () => {
  let phaserGame: Phaser.Game;
  let game: GameManager;
  beforeAll(() => {
    phaserGame = new Phase.Game({
      type: Phaser.HEADLESS,
    });
  });

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

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

    game.override
      .battleType("single")
      .startingHeldItems([{ name: "EVIOLITE" }]);
  });

  it("should provide 50% boost to DEF and SPDEF for unevolved, unfused pokemon", async() => {
    await game.classicMode.startBattle([ Species.PICHU ]);

    const partyMember = game.scene.getPlayerPokemon()!;

    vi.spyOn(partyMember, "getEffectiveStat").mockImplementation((stat, _opponent?, _move?, _isCritical?) => {
      const statValue = new NumberHolder(partyMember.getStat(stat, false));
      game.scene.applyModifiers(StatBoosterModifier, partyMember.isPlayer(), partyMember, stat, statValue);

      // Ignore other calculations for simplicity

      return Math.floor(statValue.value);
    });

    const defStat = partyMember.getStat(Stat.DEF, false);
    const spDefStat = partyMember.getStat(Stat.SPDEF, false);

    expect(partyMember.getEffectiveStat(Stat.DEF)).toBe(Math.floor(defStat * 1.5));
    expect(partyMember.getEffectiveStat(Stat.SPDEF)).toBe(Math.floor(spDefStat * 1.5));
  });

  it("should not provide a boost for fully evolved, unfused pokemon", async() => {
    await game.classicMode.startBattle([ Species.RAICHU ]);

    const partyMember = game.scene.getPlayerPokemon()!;

    vi.spyOn(partyMember, "getEffectiveStat").mockImplementation((stat, _opponent?, _move?, _isCritical?) => {
      const statValue = new NumberHolder(partyMember.getStat(stat, false));
      game.scene.applyModifiers(StatBoosterModifier, partyMember.isPlayer(), partyMember, stat, statValue);

      // Ignore other calculations for simplicity

      return Math.floor(statValue.value);
    });

    const defStat = partyMember.getStat(Stat.DEF, false);
    const spDefStat = partyMember.getStat(Stat.SPDEF, false);

    expect(partyMember.getEffectiveStat(Stat.DEF)).toBe(defStat);
    expect(partyMember.getEffectiveStat(Stat.SPDEF)).toBe(spDefStat);

  });

  it("should provide 50% boost to DEF and SPDEF for completely unevolved, fused pokemon", async() => {
    await game.classicMode.startBattle([ Species.PICHU, Species.CLEFFA ]);

    const [ partyMember, ally ] = game.scene.getPlayerParty();

    // Fuse party members (taken from PlayerPokemon.fuse(...) function)
    partyMember.fusionSpecies = ally.species;
    partyMember.fusionFormIndex = ally.formIndex;
    partyMember.fusionAbilityIndex = ally.abilityIndex;
    partyMember.fusionShiny = ally.shiny;
    partyMember.fusionVariant = ally.variant;
    partyMember.fusionGender = ally.gender;
    partyMember.fusionLuck = ally.luck;

    vi.spyOn(partyMember, "getEffectiveStat").mockImplementation((stat, _opponent?, _move?, _isCritical?) => {
      const statValue = new NumberHolder(partyMember.getStat(stat, false));
      game.scene.applyModifiers(StatBoosterModifier, partyMember.isPlayer(), partyMember, stat, statValue);

      // Ignore other calculations for simplicity

      return Math.floor(statValue.value);
    });

    const defStat = partyMember.getStat(Stat.DEF, false);
    const spDefStat = partyMember.getStat(Stat.SPDEF, false);

    expect(partyMember.getEffectiveStat(Stat.DEF)).toBe(Math.floor(defStat * 1.5));
    expect(partyMember.getEffectiveStat(Stat.SPDEF)).toBe(Math.floor(spDefStat * 1.5));
  });

  it("should provide 25% boost to DEF and SPDEF for partially unevolved (base), fused pokemon", async() => {
    await game.classicMode.startBattle([ Species.PICHU, Species.CLEFABLE ]);

    const [ partyMember, ally ] = game.scene.getPlayerParty();

    // Fuse party members (taken from PlayerPokemon.fuse(...) function)
    partyMember.fusionSpecies = ally.species;
    partyMember.fusionFormIndex = ally.formIndex;
    partyMember.fusionAbilityIndex = ally.abilityIndex;
    partyMember.fusionShiny = ally.shiny;
    partyMember.fusionVariant = ally.variant;
    partyMember.fusionGender = ally.gender;
    partyMember.fusionLuck = ally.luck;

    vi.spyOn(partyMember, "getEffectiveStat").mockImplementation((stat, _opponent?, _move?, _isCritical?) => {
      const statValue = new NumberHolder(partyMember.getStat(stat, false));
      game.scene.applyModifiers(StatBoosterModifier, partyMember.isPlayer(), partyMember, stat, statValue);

      // Ignore other calculations for simplicity

      return Math.floor(statValue.value);
    });

    const defStat = partyMember.getStat(Stat.DEF, false);
    const spDefStat = partyMember.getStat(Stat.SPDEF, false);

    expect(partyMember.getEffectiveStat(Stat.DEF)).toBe(Math.floor(defStat * 1.25));
    expect(partyMember.getEffectiveStat(Stat.SPDEF)).toBe(Math.floor(spDefStat * 1.25));
  });

  it("should provide 25% boost to DEF and SPDEF for partially unevolved (fusion), fused pokemon", async() => {
    await game.classicMode.startBattle([ Species.RAICHU, Species.CLEFFA ]);

    const [ partyMember, ally ] = game.scene.getPlayerParty();

    // Fuse party members (taken from PlayerPokemon.fuse(...) function)
    partyMember.fusionSpecies = ally.species;
    partyMember.fusionFormIndex = ally.formIndex;
    partyMember.fusionAbilityIndex = ally.abilityIndex;
    partyMember.fusionShiny = ally.shiny;
    partyMember.fusionVariant = ally.variant;
    partyMember.fusionGender = ally.gender;
    partyMember.fusionLuck = ally.luck;

    vi.spyOn(partyMember, "getEffectiveStat").mockImplementation((stat, _opponent?, _move?, _isCritical?) => {
      const statValue = new NumberHolder(partyMember.getStat(stat, false));
      game.scene.applyModifiers(StatBoosterModifier, partyMember.isPlayer(), partyMember, stat, statValue);

      // Ignore other calculations for simplicity

      return Math.floor(statValue.value);
    });

    const defStat = partyMember.getStat(Stat.DEF, false);
    const spDefStat = partyMember.getStat(Stat.SPDEF, false);

    expect(partyMember.getEffectiveStat(Stat.DEF)).toBe(Math.floor(defStat * 1.25));
    expect(partyMember.getEffectiveStat(Stat.SPDEF)).toBe(Math.floor(spDefStat * 1.25));
  });

  it("should not provide a boost for fully evolved, fused pokemon", async() => {
    await game.classicMode.startBattle([ Species.RAICHU, Species.CLEFABLE ]);

    const [ partyMember, ally ] = game.scene.getPlayerParty();

    // Fuse party members (taken from PlayerPokemon.fuse(...) function)
    partyMember.fusionSpecies = ally.species;
    partyMember.fusionFormIndex = ally.formIndex;
    partyMember.fusionAbilityIndex = ally.abilityIndex;
    partyMember.fusionShiny = ally.shiny;
    partyMember.fusionVariant = ally.variant;
    partyMember.fusionGender = ally.gender;
    partyMember.fusionLuck = ally.luck;

    vi.spyOn(partyMember, "getEffectiveStat").mockImplementation((stat, _opponent?, _move?, _isCritical?) => {
      const statValue = new NumberHolder(partyMember.getStat(stat, false));
      game.scene.applyModifiers(StatBoosterModifier, partyMember.isPlayer(), partyMember, stat, statValue);

      // Ignore other calculations for simplicity

      return Math.floor(statValue.value);
    });

    const defStat = partyMember.getStat(Stat.DEF, false);
    const spDefStat = partyMember.getStat(Stat.SPDEF, false);

    expect(partyMember.getEffectiveStat(Stat.DEF)).toBe(defStat);
    expect(partyMember.getEffectiveStat(Stat.SPDEF)).toBe(spDefStat);
  });

  it("should not provide a boost for Gigantamax Pokémon", async() => {
    game.override.starterForms({
      [Species.PIKACHU]: 8,
      [Species.EEVEE]: 2,
      [Species.DURALUDON]: 1,
      [Species.MEOWTH]: 1
    });

    const gMaxablePokemon = [ Species.PIKACHU, Species.EEVEE, Species.DURALUDON, Species.MEOWTH ];

    await game.classicMode.startBattle([ randItem(gMaxablePokemon) ]);

    const partyMember = game.scene.getPlayerPokemon()!;

    vi.spyOn(partyMember, "getEffectiveStat").mockImplementation((stat, _opponent?, _move?, _isCritical?) => {
      const statValue = new NumberHolder(partyMember.getStat(stat, false));
      game.scene.applyModifiers(StatBoosterModifier, partyMember.isPlayer(), partyMember, stat, statValue);

      // Ignore other calculations for simplicity

      return Math.floor(statValue.value);
    });

    const defStat = partyMember.getStat(Stat.DEF, false);
    const spDefStat = partyMember.getStat(Stat.SPDEF, false);

    expect(partyMember.getEffectiveStat(Stat.DEF)).toBe(defStat);
    expect(partyMember.getEffectiveStat(Stat.SPDEF)).toBe(spDefStat);
  });
});