import { globalScene } from "#app/global-scene";
import type MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
import { MysteryEncounterBuilder } from "#app/data/mystery-encounters/mystery-encounter";
import { MysteryEncounterOptionBuilder } from "#app/data/mystery-encounters/mystery-encounter-option";
import {
  CombinationPokemonRequirement,
  HeldItemRequirement,
  MoneyRequirement,
} from "#app/data/mystery-encounters/mystery-encounter-requirements";
import { getEncounterText, showEncounterText } from "#app/data/mystery-encounters/utils/encounter-dialogue-utils";
import {
  generateModifierType,
  leaveEncounterWithoutBattle,
  selectPokemonForOption,
  updatePlayerMoney,
} from "#app/data/mystery-encounters/utils/encounter-phase-utils";
import { applyModifierTypeToPlayerPokemon } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
import { getPokemonSpecies } from "#app/data/pokemon-species";
import type { PlayerPokemon } from "#app/field/pokemon";
import type Pokemon from "#app/field/pokemon";
import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
import type { PokemonHeldItemModifier, PokemonInstantReviveModifier } from "#app/modifier/modifier";
import {
  BerryModifier,
  HealingBoosterModifier,
  LevelIncrementBoosterModifier,
  MoneyMultiplierModifier,
  PreserveBerryModifier,
} from "#app/modifier/modifier";
import type { PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
import { modifierTypes } from "#app/data/data-lists";
import i18next from "#app/plugins/i18n";
import type { OptionSelectItem } from "#app/ui/abstact-option-select-ui-handler";
import { randSeedItem } from "#app/utils/common";
import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";
import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
import { MysteryEncounterType } from "#enums/mystery-encounter-type";
import { SpeciesId } from "#enums/species-id";
import { timedEventManager } from "#app/global-event-manager";

/** the i18n namespace for this encounter */
const namespace = "mysteryEncounters/delibirdy";

/** Berries only */
const OPTION_2_ALLOWED_MODIFIERS = ["BerryModifier", "PokemonInstantReviveModifier"];

/** Disallowed items are berries, Reviver Seeds, and Vitamins (form change items and fusion items are not PokemonHeldItemModifiers) */
const OPTION_3_DISALLOWED_MODIFIERS = [
  "BerryModifier",
  "PokemonInstantReviveModifier",
  "TerastallizeModifier",
  "PokemonBaseStatModifier",
  "PokemonBaseStatTotalModifier",
];

const DELIBIRDY_MONEY_PRICE_MULTIPLIER = 2;

const doEventReward = () => {
  const event_buff = timedEventManager.getDelibirdyBuff();
  if (event_buff.length > 0) {
    const candidates = event_buff.filter(c => {
      const mtype = generateModifierType(modifierTypes[c]);
      const existingCharm = globalScene.findModifier(m => m.type.id === mtype?.id);
      return !(existingCharm && existingCharm.getStackCount() >= existingCharm.getMaxStackCount());
    });
    if (candidates.length > 0) {
      globalScene.phaseManager.unshiftNew("ModifierRewardPhase", modifierTypes[randSeedItem(candidates)]);
    } else {
      // At max stacks, give a Voucher instead
      globalScene.phaseManager.unshiftNew("ModifierRewardPhase", modifierTypes.VOUCHER);
    }
  }
};

/**
 * Delibird-y encounter.
 * @see {@link https://github.com/pagefaultgames/pokerogue/issues/3804 | GitHub Issue #3804}
 * @see For biome requirements check {@linkcode mysteryEncountersByBiome}
 */
export const DelibirdyEncounter: MysteryEncounter = MysteryEncounterBuilder.withEncounterType(
  MysteryEncounterType.DELIBIRDY,
)
  .withEncounterTier(MysteryEncounterTier.GREAT)
  .withSceneWaveRangeRequirement(...CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES)
  .withSceneRequirement(new MoneyRequirement(0, DELIBIRDY_MONEY_PRICE_MULTIPLIER)) // Must have enough money for it to spawn at the very least
  .withPrimaryPokemonRequirement(
    CombinationPokemonRequirement.Some(
      // Must also have either option 2 or 3 available to spawn
      new HeldItemRequirement(OPTION_2_ALLOWED_MODIFIERS),
      new HeldItemRequirement(OPTION_3_DISALLOWED_MODIFIERS, 1, true),
    ),
  )
  .withIntroSpriteConfigs([
    {
      spriteKey: "",
      fileRoot: "",
      species: SpeciesId.DELIBIRD,
      hasShadow: true,
      repeat: true,
      startFrame: 38,
      scale: 0.94,
    },
    {
      spriteKey: "",
      fileRoot: "",
      species: SpeciesId.DELIBIRD,
      hasShadow: true,
      repeat: true,
      scale: 1.06,
    },
    {
      spriteKey: "",
      fileRoot: "",
      species: SpeciesId.DELIBIRD,
      hasShadow: true,
      repeat: true,
      startFrame: 65,
      x: 1,
      y: 5,
      yShadow: 5,
    },
  ])
  .withIntroDialogue([
    {
      text: `${namespace}:intro`,
    },
  ])
  .setLocalizationKey(`${namespace}`)
  .withTitle(`${namespace}:title`)
  .withDescription(`${namespace}:description`)
  .withQuery(`${namespace}:query`)
  .withOutroDialogue([
    {
      text: `${namespace}:outro`,
    },
  ])
  .withOnInit(() => {
    const encounter = globalScene.currentBattle.mysteryEncounter!;
    encounter.setDialogueToken("delibirdName", getPokemonSpecies(SpeciesId.DELIBIRD).getName());

    globalScene.loadBgm("mystery_encounter_delibirdy", "mystery_encounter_delibirdy.mp3");
    return true;
  })
  .withOnVisualsStart(() => {
    globalScene.fadeAndSwitchBgm("mystery_encounter_delibirdy");
    return true;
  })
  .withOption(
    MysteryEncounterOptionBuilder.newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_DEFAULT)
      .withSceneMoneyRequirement(0, DELIBIRDY_MONEY_PRICE_MULTIPLIER) // Must have money to spawn
      .withDialogue({
        buttonLabel: `${namespace}:option.1.label`,
        buttonTooltip: `${namespace}:option.1.tooltip`,
        selected: [
          {
            text: `${namespace}:option.1.selected`,
          },
        ],
      })
      .withPreOptionPhase(async (): Promise<boolean> => {
        const encounter = globalScene.currentBattle.mysteryEncounter!;
        updatePlayerMoney(-(encounter.options[0].requirements[0] as MoneyRequirement).requiredMoney, true, false);
        return true;
      })
      .withOptionPhase(async () => {
        // Give the player an Amulet Coin
        // Check if the player has max stacks of that item already
        const existing = globalScene.findModifier(m => m instanceof MoneyMultiplierModifier) as MoneyMultiplierModifier;

        if (existing && existing.getStackCount() >= existing.getMaxStackCount()) {
          // At max stacks, give the first party pokemon a Shell Bell instead
          const shellBell = generateModifierType(modifierTypes.SHELL_BELL) as PokemonHeldItemModifierType;
          await applyModifierTypeToPlayerPokemon(globalScene.getPlayerPokemon()!, shellBell);
          globalScene.playSound("item_fanfare");
          await showEncounterText(
            i18next.t("battle:rewardGain", { modifierName: shellBell.name }),
            null,
            undefined,
            true,
          );
          doEventReward();
        } else {
          globalScene.phaseManager.unshiftNew("ModifierRewardPhase", modifierTypes.AMULET_COIN);
          doEventReward();
        }

        leaveEncounterWithoutBattle(true);
      })
      .build(),
  )
  .withOption(
    MysteryEncounterOptionBuilder.newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_DEFAULT)
      .withPrimaryPokemonRequirement(new HeldItemRequirement(OPTION_2_ALLOWED_MODIFIERS))
      .withDialogue({
        buttonLabel: `${namespace}:option.2.label`,
        buttonTooltip: `${namespace}:option.2.tooltip`,
        secondOptionPrompt: `${namespace}:option.2.select_prompt`,
        selected: [
          {
            text: `${namespace}:option.2.selected`,
          },
        ],
      })
      .withPreOptionPhase(async (): Promise<boolean> => {
        const encounter = globalScene.currentBattle.mysteryEncounter!;
        const onPokemonSelected = (pokemon: PlayerPokemon) => {
          // Get Pokemon held items and filter for valid ones
          const validItems = pokemon.getHeldItems().filter(it => {
            return OPTION_2_ALLOWED_MODIFIERS.some(heldItem => it.constructor.name === heldItem) && it.isTransferable;
          });

          return validItems.map((modifier: PokemonHeldItemModifier) => {
            const option: OptionSelectItem = {
              label: modifier.type.name,
              handler: () => {
                // Pokemon and item selected
                encounter.setDialogueToken("chosenItem", modifier.type.name);
                encounter.misc = {
                  chosenPokemon: pokemon,
                  chosenModifier: modifier,
                };
                return true;
              },
            };
            return option;
          });
        };

        const selectableFilter = (pokemon: Pokemon) => {
          // If pokemon has valid item, it can be selected
          const meetsReqs = encounter.options[1].pokemonMeetsPrimaryRequirements(pokemon);
          if (!meetsReqs) {
            return getEncounterText(`${namespace}:invalid_selection`) ?? null;
          }

          return null;
        };

        return selectPokemonForOption(onPokemonSelected, undefined, selectableFilter);
      })
      .withOptionPhase(async () => {
        const encounter = globalScene.currentBattle.mysteryEncounter!;
        const modifier: BerryModifier | PokemonInstantReviveModifier = encounter.misc.chosenModifier;
        const chosenPokemon: PlayerPokemon = encounter.misc.chosenPokemon;

        // Give the player a Candy Jar if they gave a Berry, and a Berry Pouch for Reviver Seed
        if (modifier instanceof BerryModifier) {
          // Check if the player has max stacks of that Candy Jar already
          const existing = globalScene.findModifier(
            m => m instanceof LevelIncrementBoosterModifier,
          ) as LevelIncrementBoosterModifier;

          if (existing && existing.getStackCount() >= existing.getMaxStackCount()) {
            // At max stacks, give the first party pokemon a Shell Bell instead
            const shellBell = generateModifierType(modifierTypes.SHELL_BELL) as PokemonHeldItemModifierType;
            await applyModifierTypeToPlayerPokemon(globalScene.getPlayerPokemon()!, shellBell);
            globalScene.playSound("item_fanfare");
            await showEncounterText(
              i18next.t("battle:rewardGain", {
                modifierName: shellBell.name,
              }),
              null,
              undefined,
              true,
            );
            doEventReward();
          } else {
            globalScene.phaseManager.unshiftNew("ModifierRewardPhase", modifierTypes.CANDY_JAR);
            doEventReward();
          }
        } else {
          // Check if the player has max stacks of that Berry Pouch already
          const existing = globalScene.findModifier(m => m instanceof PreserveBerryModifier) as PreserveBerryModifier;

          if (existing && existing.getStackCount() >= existing.getMaxStackCount()) {
            // At max stacks, give the first party pokemon a Shell Bell instead
            const shellBell = generateModifierType(modifierTypes.SHELL_BELL) as PokemonHeldItemModifierType;
            await applyModifierTypeToPlayerPokemon(globalScene.getPlayerPokemon()!, shellBell);
            globalScene.playSound("item_fanfare");
            await showEncounterText(
              i18next.t("battle:rewardGain", {
                modifierName: shellBell.name,
              }),
              null,
              undefined,
              true,
            );
            doEventReward();
          } else {
            globalScene.phaseManager.unshiftNew("ModifierRewardPhase", modifierTypes.BERRY_POUCH);
            doEventReward();
          }
        }

        chosenPokemon.loseHeldItem(modifier, false);

        leaveEncounterWithoutBattle(true);
      })
      .build(),
  )
  .withOption(
    MysteryEncounterOptionBuilder.newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_DEFAULT)
      .withPrimaryPokemonRequirement(new HeldItemRequirement(OPTION_3_DISALLOWED_MODIFIERS, 1, true))
      .withDialogue({
        buttonLabel: `${namespace}:option.3.label`,
        buttonTooltip: `${namespace}:option.3.tooltip`,
        secondOptionPrompt: `${namespace}:option.3.select_prompt`,
        selected: [
          {
            text: `${namespace}:option.3.selected`,
          },
        ],
      })
      .withPreOptionPhase(async (): Promise<boolean> => {
        const encounter = globalScene.currentBattle.mysteryEncounter!;
        const onPokemonSelected = (pokemon: PlayerPokemon) => {
          // Get Pokemon held items and filter for valid ones
          const validItems = pokemon.getHeldItems().filter(it => {
            return (
              !OPTION_3_DISALLOWED_MODIFIERS.some(heldItem => it.constructor.name === heldItem) && it.isTransferable
            );
          });

          return validItems.map((modifier: PokemonHeldItemModifier) => {
            const option: OptionSelectItem = {
              label: modifier.type.name,
              handler: () => {
                // Pokemon and item selected
                encounter.setDialogueToken("chosenItem", modifier.type.name);
                encounter.misc = {
                  chosenPokemon: pokemon,
                  chosenModifier: modifier,
                };
                return true;
              },
            };
            return option;
          });
        };

        const selectableFilter = (pokemon: Pokemon) => {
          // If pokemon has valid item, it can be selected
          const meetsReqs = encounter.options[2].pokemonMeetsPrimaryRequirements(pokemon);
          if (!meetsReqs) {
            return getEncounterText(`${namespace}:invalid_selection`) ?? null;
          }

          return null;
        };

        return selectPokemonForOption(onPokemonSelected, undefined, selectableFilter);
      })
      .withOptionPhase(async () => {
        const encounter = globalScene.currentBattle.mysteryEncounter!;
        const modifier = encounter.misc.chosenModifier;
        const chosenPokemon: PlayerPokemon = encounter.misc.chosenPokemon;

        // Check if the player has max stacks of Healing Charm already
        const existing = globalScene.findModifier(m => m instanceof HealingBoosterModifier) as HealingBoosterModifier;

        if (existing && existing.getStackCount() >= existing.getMaxStackCount()) {
          // At max stacks, give the first party pokemon a Shell Bell instead
          const shellBell = generateModifierType(modifierTypes.SHELL_BELL) as PokemonHeldItemModifierType;
          await applyModifierTypeToPlayerPokemon(globalScene.getPlayerParty()[0], shellBell);
          globalScene.playSound("item_fanfare");
          await showEncounterText(
            i18next.t("battle:rewardGain", { modifierName: shellBell.name }),
            null,
            undefined,
            true,
          );
          doEventReward();
        } else {
          globalScene.phaseManager.unshiftNew("ModifierRewardPhase", modifierTypes.HEALING_CHARM);
          doEventReward();
        }

        chosenPokemon.loseHeldItem(modifier, false);

        leaveEncounterWithoutBattle(true);
      })
      .build(),
  )
  .build();