/* eslint-disable max-lines-per-function -- Test suites naturally have many cases */
/* eslint-disable @typescript-eslint/consistent-type-assertions -- Tests build minimal state objects */
import { describe, expect, it } from "vitest";
import {
  buildPostApotheosisState,
  isEligibleForApotheosis,
} from "../../src/services/apotheosis.js";
import { defaultTranscendenceUpgrades } from "../../src/data/transcendenceUpgrades.js";
import type { GameState } from "@elysium/types";

const ALL_UPGRADE_IDS = defaultTranscendenceUpgrades.map((u) => u.id);

const makePlayer = (overrides: Partial<GameState["player"]> = {}) => ({
  avatar:                       null,
  characterName:                "T",
  discordId:                    "t",
  discriminator:                "0",
  lifetimeAchievementsUnlocked: 0,
  lifetimeAdventurersRecruited: 0,
  lifetimeBossesDefeated:       0,
  lifetimeClicks:               0,
  lifetimeGoldEarned:           0,
  lifetimeQuestsCompleted:      0,
  totalClicks:                  0,
  totalGoldEarned:              0,
  username:                     "u",
  ...overrides,
});

const makeMinimalState = (overrides: Partial<GameState> = {}): GameState =>
  ({
    player: makePlayer(),
    resources: { gold: 0, essence: 0, crystals: 0, runestones: 0 },
    adventurers: [],
    upgrades: [],
    quests: [],
    bosses: [],
    equipment: [],
    achievements: [],
    zones: [],
    exploration: { areas: [], materials: [], craftedRecipeIds: [], craftedGoldMultiplier: 1, craftedEssenceMultiplier: 1, craftedClickMultiplier: 1, craftedCombatMultiplier: 1 },
    companions: { unlockedCompanionIds: [], activeCompanionId: null },
    prestige: { count: 0, runestones: 0, productionMultiplier: 1, purchasedUpgradeIds: [] },
    baseClickPower: 1,
    lastTickAt: 0,
    schemaVersion: 1,
    ...overrides,
  } as GameState);

describe("isEligibleForApotheosis", () => {
  it("returns true when all transcendence upgrades are purchased", () => {
    const state = makeMinimalState({
      transcendence: {
        count: 1, echoes: 0, purchasedUpgradeIds: ALL_UPGRADE_IDS,
        echoIncomeMultiplier: 1, echoCombatMultiplier: 1,
        echoPrestigeThresholdMultiplier: 1, echoPrestigeRunestoneMultiplier: 1, echoMetaMultiplier: 1,
      },
    });
    expect(isEligibleForApotheosis(state)).toBe(true);
  });

  it("returns false when one upgrade is missing", () => {
    const partialIds = ALL_UPGRADE_IDS.slice(0, -1);
    const state = makeMinimalState({
      transcendence: {
        count: 1, echoes: 0, purchasedUpgradeIds: partialIds,
        echoIncomeMultiplier: 1, echoCombatMultiplier: 1,
        echoPrestigeThresholdMultiplier: 1, echoPrestigeRunestoneMultiplier: 1, echoMetaMultiplier: 1,
      },
    });
    expect(isEligibleForApotheosis(state)).toBe(false);
  });

  it("returns false when transcendence is undefined", () => {
    const state = makeMinimalState({ transcendence: undefined });
    expect(isEligibleForApotheosis(state)).toBe(false);
  });

  it("returns false when purchasedUpgradeIds is empty", () => {
    const state = makeMinimalState({
      transcendence: {
        count: 1, echoes: 0, purchasedUpgradeIds: [],
        echoIncomeMultiplier: 1, echoCombatMultiplier: 1,
        echoPrestigeThresholdMultiplier: 1, echoPrestigeRunestoneMultiplier: 1, echoMetaMultiplier: 1,
      },
    });
    expect(isEligibleForApotheosis(state)).toBe(false);
  });
});

describe("buildPostApotheosisState", () => {
  it("increments apotheosis count from 0", () => {
    const state = makeMinimalState();
    const { updatedApotheosisData } = buildPostApotheosisState(state, "T");
    expect(updatedApotheosisData.count).toBe(1);
  });

  it("increments apotheosis count from existing value", () => {
    const state = makeMinimalState({ apotheosis: { count: 2 } });
    const { updatedApotheosisData } = buildPostApotheosisState(state, "T");
    expect(updatedApotheosisData.count).toBe(3);
  });

  it("persists codex", () => {
    const codex = { entries: [{ id: "e1", unlockedAt: 1000, sourceType: "exploration" as const }] };
    const state = makeMinimalState({ codex });
    const { updatedState } = buildPostApotheosisState(state, "T");
    expect(updatedState.codex).toEqual(codex);
  });

  it("persists story", () => {
    const story = { unlockedChapterIds: ["ch1"], completedChapters: [] };
    const state = makeMinimalState({ story });
    const { updatedState } = buildPostApotheosisState(state, "T");
    expect(updatedState.story).toEqual(story);
  });

  it("persists active companion selection across apotheosis", () => {
    const companions = { unlockedCompanionIds: ["lyra", "pria"], activeCompanionId: "pria" };
    const state = makeMinimalState({ companions });
    const { updatedState } = buildPostApotheosisState(state, "T");
    expect(updatedState.companions).toEqual(companions);
  });

  it("falls back to fresh companion state when currentState.companions is undefined", () => {
    const state = makeMinimalState({ companions: undefined });
    const { updatedState } = buildPostApotheosisState(state, "T");
    expect(updatedState.companions).toEqual({ activeCompanionId: null, unlockedCompanionIds: [] });
  });

  it("wipes prestige data", () => {
    const state = makeMinimalState({
      prestige: { count: 10, runestones: 1000, productionMultiplier: 3, purchasedUpgradeIds: [] },
    });
    const { updatedState } = buildPostApotheosisState(state, "T");
    expect(updatedState.prestige.count).toBe(0);
    expect(updatedState.prestige.runestones).toBe(0);
  });

  it("sets apotheosis count on new state", () => {
    const state = makeMinimalState({ apotheosis: { count: 0 } });
    const { updatedState } = buildPostApotheosisState(state, "T");
    expect(updatedState.apotheosis?.count).toBe(1);
  });

  it("accumulates current-run gold and clicks into lifetime totals", () => {
    const state = makeMinimalState({
      player: makePlayer({ totalGoldEarned: 4_000_000, lifetimeGoldEarned: 1_000_000, totalClicks: 500 }),
    });
    const { updatedState } = buildPostApotheosisState(state, "T");
    expect(updatedState.player.lifetimeGoldEarned).toBe(5_000_000);
    expect(updatedState.player.lifetimeClicks).toBe(500);
  });

  it("accumulates defeated bosses, completed quests, and recruited adventurers into lifetime totals", () => {
    const boss = { id: "boss_1", status: "defeated" as const };
    const quest = { id: "q_1", status: "completed" as const };
    const adventurer = { id: "adv_1", count: 5 };
    const state = makeMinimalState({
      bosses: [ boss ] as GameState["bosses"],
      quests: [ quest ] as GameState["quests"],
      adventurers: [ adventurer ] as GameState["adventurers"],
    });
    const { updatedState } = buildPostApotheosisState(state, "T");
    expect(updatedState.player.lifetimeBossesDefeated).toBe(1);
    expect(updatedState.player.lifetimeQuestsCompleted).toBe(1);
    expect(updatedState.player.lifetimeAdventurersRecruited).toBe(5);
  });

  it("preserves achievements and accumulates newly-unlocked ones into the lifetime total", () => {
    const achievement = { id: "ach_1", unlockedAt: Date.now() };
    const state = makeMinimalState({
      achievements: [ achievement ] as GameState["achievements"],
    });
    const { updatedState } = buildPostApotheosisState(state, "T");
    expect(updatedState.achievements).toEqual([ achievement ]);
    expect(updatedState.player.lifetimeAchievementsUnlocked).toBe(1);
  });

  it("does not re-count achievements already folded into the lifetime total by a previous reset", () => {
    const achievement = { id: "ach_1", unlockedAt: Date.now() };
    const state = makeMinimalState({
      achievements: [ achievement ] as GameState["achievements"],
      player: makePlayer({ lifetimeAchievementsUnlocked: 1 }),
    });
    const { updatedState } = buildPostApotheosisState(state, "T");
    expect(updatedState.player.lifetimeAchievementsUnlocked).toBe(1);
  });

  it("preserves equipment ownership history across apotheosis", () => {
    const equipment = { id: "rusty_sword", owned: true, everOwned: true };
    const state = makeMinimalState({
      equipment: [ equipment ] as GameState["equipment"],
    });
    const { updatedState } = buildPostApotheosisState(state, "T");
    const matchingItem = updatedState.equipment.find((item) => {
      return item.id === "rusty_sword";
    });
    expect(matchingItem?.everOwned).toBe(true);
  });
});