import { globalScene } from "#app/global-scene";
import type { BattlerIndex } from "#enums/battler-index";
import { applyAbAttrs } from "#app/data/abilities/apply-ab-attrs";
import { MistTag } from "#app/data/arena-tag";
import { ArenaTagSide } from "#enums/arena-tag-side";
import type { ArenaTag } from "#app/data/arena-tag";
import type Pokemon from "#app/field/pokemon";
import { getPokemonNameWithAffix } from "#app/messages";
import { ResetNegativeStatStageModifier } from "#app/modifier/modifier";
import { handleTutorial, Tutorial } from "#app/tutorial";
import { NumberHolder, BooleanHolder, isNullOrUndefined } from "#app/utils/common";
import i18next from "i18next";
import { PokemonPhase } from "./pokemon-phase";
import { Stat, type BattleStat, getStatKey, getStatStageChangeDescriptionKey } from "#enums/stat";
import { OctolockTag } from "#app/data/battler-tags";
import { ArenaTagType } from "#app/enums/arena-tag-type";
import type {
  ConditionalUserFieldProtectStatAbAttrParams,
  PreStatStageChangeAbAttrParams,
} from "#app/@types/ability-types";

export type StatStageChangeCallback = (
  target: Pokemon | null,
  changed: BattleStat[],
  relativeChanges: number[],
) => void;

export class StatStageChangePhase extends PokemonPhase {
  public readonly phaseName = "StatStageChangePhase";
  private stats: BattleStat[];
  private selfTarget: boolean;
  private stages: number;
  private showMessage: boolean;
  private ignoreAbilities: boolean;
  private canBeCopied: boolean;
  private onChange: StatStageChangeCallback | null;
  private comingFromMirrorArmorUser: boolean;
  private comingFromStickyWeb: boolean;

  constructor(
    battlerIndex: BattlerIndex,
    selfTarget: boolean,
    stats: BattleStat[],
    stages: number,
    showMessage = true,
    ignoreAbilities = false,
    canBeCopied = true,
    onChange: StatStageChangeCallback | null = null,
    comingFromMirrorArmorUser = false,
    comingFromStickyWeb = false,
  ) {
    super(battlerIndex);

    this.selfTarget = selfTarget;
    this.stats = stats;
    this.stages = stages;
    this.showMessage = showMessage;
    this.ignoreAbilities = ignoreAbilities;
    this.canBeCopied = canBeCopied;
    this.onChange = onChange;
    this.comingFromMirrorArmorUser = comingFromMirrorArmorUser;
    this.comingFromStickyWeb = comingFromStickyWeb;
  }

  start() {
    // Check if multiple stats are being changed at the same time, then run SSCPhase for each of them
    if (this.stats.length > 1) {
      for (let i = 0; i < this.stats.length; i++) {
        const stat = [this.stats[i]];
        globalScene.phaseManager.unshiftNew(
          "StatStageChangePhase",
          this.battlerIndex,
          this.selfTarget,
          stat,
          this.stages,
          this.showMessage,
          this.ignoreAbilities,
          this.canBeCopied,
          this.onChange,
          this.comingFromMirrorArmorUser,
        );
      }
      return this.end();
    }

    const pokemon = this.getPokemon();
    let opponentPokemon: Pokemon | undefined;

    /** Gets the position of last enemy or player pokemon that used ability or move, primarily for double battles involving Mirror Armor */
    if (pokemon.isPlayer()) {
      /** If this SSCP is not from sticky web, then we find the opponent pokemon that last did something */
      if (!this.comingFromStickyWeb) {
        opponentPokemon = globalScene.getEnemyField()[globalScene.currentBattle.lastEnemyInvolved];
      } else {
        /** If this SSCP is from sticky web, then check if pokemon that last sucessfully used sticky web is on field */
        const stickyTagID = globalScene.arena.findTagsOnSide(
          (t: ArenaTag) => t.tagType === ArenaTagType.STICKY_WEB,
          ArenaTagSide.PLAYER,
        )[0].sourceId;
        globalScene.getEnemyField().forEach(e => {
          if (e.id === stickyTagID) {
            opponentPokemon = e;
          }
        });
      }
    } else {
      if (!this.comingFromStickyWeb) {
        opponentPokemon = globalScene.getPlayerField()[globalScene.currentBattle.lastPlayerInvolved];
      } else {
        const stickyTagID = globalScene.arena.findTagsOnSide(
          (t: ArenaTag) => t.tagType === ArenaTagType.STICKY_WEB,
          ArenaTagSide.ENEMY,
        )[0].sourceId;
        globalScene.getPlayerField().forEach(e => {
          if (e.id === stickyTagID) {
            opponentPokemon = e;
          }
        });
      }
    }

    if (!pokemon.isActive(true)) {
      return this.end();
    }

    const stages = new NumberHolder(this.stages);

    if (!this.ignoreAbilities) {
      applyAbAttrs("StatStageChangeMultiplierAbAttr", { pokemon, numStages: stages });
    }

    let simulate = false;

    const filteredStats = this.stats.filter(stat => {
      const cancelled = new BooleanHolder(false);

      if (!this.selfTarget && stages.value < 0) {
        // TODO: add a reference to the source of the stat change to fix Infiltrator interaction
        globalScene.arena.applyTagsForSide(
          MistTag,
          pokemon.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY,
          false,
          null,
          cancelled,
        );
      }

      if (!cancelled.value && !this.selfTarget && stages.value < 0) {
        const abAttrParams: PreStatStageChangeAbAttrParams & ConditionalUserFieldProtectStatAbAttrParams = {
          pokemon,
          stat,
          cancelled,
          simulated: simulate,
          target: pokemon,
          stages: this.stages,
        };
        applyAbAttrs("ProtectStatAbAttr", abAttrParams);
        applyAbAttrs("ConditionalUserFieldProtectStatAbAttr", abAttrParams);
        // TODO: Consider skipping this call if `cancelled` is false.
        const ally = pokemon.getAlly();
        if (!isNullOrUndefined(ally)) {
          applyAbAttrs("ConditionalUserFieldProtectStatAbAttr", { ...abAttrParams, pokemon: ally });
        }

        /** Potential stat reflection due to Mirror Armor, does not apply to Octolock end of turn effect */
        if (
          opponentPokemon !== undefined &&
          // TODO: investigate whether this is stoping mirror armor from applying to non-octolock
          // reasons for stat drops if the user has the Octolock tag
          !pokemon.findTag(t => t instanceof OctolockTag) &&
          !this.comingFromMirrorArmorUser
        ) {
          applyAbAttrs("ReflectStatStageChangeAbAttr", {
            pokemon,
            stat,
            cancelled,
            simulated: simulate,
            source: opponentPokemon,
            stages: this.stages,
          });
        }
      }

      // If one stat stage decrease is cancelled, simulate the rest of the applications
      if (cancelled.value) {
        simulate = true;
      }

      return !cancelled.value;
    });

    const relLevels = filteredStats.map(
      s =>
        (stages.value >= 1
          ? Math.min(pokemon.getStatStage(s) + stages.value, 6)
          : Math.max(pokemon.getStatStage(s) + stages.value, -6)) - pokemon.getStatStage(s),
    );

    this.onChange?.(this.getPokemon(), filteredStats, relLevels);

    const end = () => {
      if (this.showMessage) {
        const messages = this.getStatStageChangeMessages(filteredStats, stages.value, relLevels);
        for (const message of messages) {
          globalScene.phaseManager.queueMessage(message);
        }
      }

      for (const s of filteredStats) {
        if (stages.value > 0 && pokemon.getStatStage(s) < 6) {
          pokemon.turnData.statStagesIncreased = true;
        } else if (stages.value < 0 && pokemon.getStatStage(s) > -6) {
          pokemon.turnData.statStagesDecreased = true;
        }

        pokemon.setStatStage(s, pokemon.getStatStage(s) + stages.value);
      }

      if (stages.value > 0 && this.canBeCopied) {
        for (const opponent of pokemon.getOpponents()) {
          applyAbAttrs("StatStageChangeCopyAbAttr", { pokemon: opponent, stats: this.stats, numStages: stages.value });
        }
      }

      applyAbAttrs("PostStatStageChangeAbAttr", {
        pokemon,
        stats: filteredStats,
        stages: this.stages,
        selfTarget: this.selfTarget,
      });

      // Look for any other stat change phases; if this is the last one, do White Herb check
      const existingPhase = globalScene.phaseManager.findPhase(
        p => p.is("StatStageChangePhase") && p.battlerIndex === this.battlerIndex,
      );
      if (!existingPhase?.is("StatStageChangePhase")) {
        // Apply White Herb if needed
        const whiteHerb = globalScene.applyModifier(
          ResetNegativeStatStageModifier,
          this.player,
          pokemon,
        ) as ResetNegativeStatStageModifier;
        // If the White Herb was applied, consume it
        if (whiteHerb) {
          pokemon.loseHeldItem(whiteHerb);
          globalScene.updateModifiers(this.player);
        }
      }

      pokemon.updateInfo();

      handleTutorial(Tutorial.Stat_Change).then(() => super.end());
    };

    if (relLevels.filter(l => l).length && globalScene.moveAnimations) {
      pokemon.enableMask();
      const pokemonMaskSprite = pokemon.maskSprite;

      const tileX = (this.player ? 106 : 236) * pokemon.getSpriteScale() * globalScene.field.scale;
      const tileY =
        ((this.player ? 148 : 84) + (stages.value >= 1 ? 160 : 0)) * pokemon.getSpriteScale() * globalScene.field.scale;
      const tileWidth = 156 * globalScene.field.scale * pokemon.getSpriteScale();
      const tileHeight = 316 * globalScene.field.scale * pokemon.getSpriteScale();

      // On increase, show the red sprite located at ATK
      // On decrease, show the blue sprite located at SPD
      const spriteColor = stages.value >= 1 ? Stat[Stat.ATK].toLowerCase() : Stat[Stat.SPD].toLowerCase();
      const statSprite = globalScene.add.tileSprite(tileX, tileY, tileWidth, tileHeight, "battle_stats", spriteColor);
      statSprite.setPipeline(globalScene.fieldSpritePipeline);
      statSprite.setAlpha(0);
      statSprite.setScale(6);
      statSprite.setOrigin(0.5, 1);

      globalScene.playSound(`se/stat_${stages.value >= 1 ? "up" : "down"}`);

      statSprite.setMask(new Phaser.Display.Masks.BitmapMask(globalScene, pokemonMaskSprite ?? undefined));

      globalScene.tweens.add({
        targets: statSprite,
        duration: 250,
        alpha: 0.8375,
        onComplete: () => {
          globalScene.tweens.add({
            targets: statSprite,
            delay: 1000,
            duration: 250,
            alpha: 0,
          });
        },
      });

      globalScene.tweens.add({
        targets: statSprite,
        duration: 1500,
        y: `${stages.value >= 1 ? "-" : "+"}=${160 * 6}`,
      });

      globalScene.time.delayedCall(1750, () => {
        pokemon.disableMask();
        end();
      });
    } else {
      end();
    }
  }

  aggregateStatStageChanges(): void {
    const accEva: BattleStat[] = [Stat.ACC, Stat.EVA];
    const isAccEva = accEva.some(s => this.stats.includes(s));
    let existingPhase: StatStageChangePhase;
    if (this.stats.length === 1) {
      while (
        (existingPhase = globalScene.phaseManager.findPhase(
          p =>
            p.is("StatStageChangePhase") &&
            p.battlerIndex === this.battlerIndex &&
            p.stats.length === 1 &&
            p.stats[0] === this.stats[0] &&
            p.selfTarget === this.selfTarget &&
            p.showMessage === this.showMessage &&
            p.ignoreAbilities === this.ignoreAbilities,
        ) as StatStageChangePhase)
      ) {
        this.stages += existingPhase.stages;

        if (!globalScene.phaseManager.tryRemovePhase(p => p === existingPhase)) {
          break;
        }
      }
    }
    while (
      (existingPhase = globalScene.phaseManager.findPhase(
        p =>
          p.is("StatStageChangePhase") &&
          p.battlerIndex === this.battlerIndex &&
          p.selfTarget === this.selfTarget &&
          accEva.some(s => p.stats.includes(s)) === isAccEva &&
          p.stages === this.stages &&
          p.showMessage === this.showMessage &&
          p.ignoreAbilities === this.ignoreAbilities,
      ) as StatStageChangePhase)
    ) {
      this.stats.push(...existingPhase.stats);
      if (!globalScene.phaseManager.tryRemovePhase(p => p === existingPhase)) {
        break;
      }
    }
  }

  getStatStageChangeMessages(stats: BattleStat[], stages: number, relStages: number[]): string[] {
    const messages: string[] = [];

    const relStageStatIndexes = {};
    for (let rl = 0; rl < relStages.length; rl++) {
      const relStage = relStages[rl];
      if (!relStageStatIndexes[relStage]) {
        relStageStatIndexes[relStage] = [];
      }
      relStageStatIndexes[relStage].push(rl);
    }

    Object.keys(relStageStatIndexes).forEach(rl => {
      const relStageStats = stats.filter((_, i) => relStageStatIndexes[rl].includes(i));
      let statsFragment = "";

      if (relStageStats.length > 1) {
        statsFragment =
          relStageStats.length >= 5
            ? i18next.t("battle:stats")
            : `${relStageStats
                .slice(0, -1)
                .map(s => i18next.t(getStatKey(s)))
                .join(
                  ", ",
                )}${relStageStats.length > 2 ? "," : ""} ${i18next.t("battle:statsAnd")} ${i18next.t(getStatKey(relStageStats[relStageStats.length - 1]))}`;
        messages.push(
          i18next.t(getStatStageChangeDescriptionKey(Math.abs(Number.parseInt(rl)), stages >= 1), {
            pokemonNameWithAffix: getPokemonNameWithAffix(this.getPokemon()),
            stats: statsFragment,
            count: relStageStats.length,
          }),
        );
      } else {
        statsFragment = i18next.t(getStatKey(relStageStats[0]));
        messages.push(
          i18next.t(getStatStageChangeDescriptionKey(Math.abs(Number.parseInt(rl)), stages >= 1), {
            pokemonNameWithAffix: getPokemonNameWithAffix(this.getPokemon()),
            stats: statsFragment,
            count: relStageStats.length,
          }),
        );
      }
    });

    return messages;
  }
}