import type {
  GameDistributionAuthor,
  GameDistributionCancelVersionResponse,
  GameDistributionCategory,
  GameDistributionCreateGameRequest,
  GameDistributionCreateVersionRequest,
  GameDistributionDeviceSupport,
  GameDistributionForkAuthorization,
  GameDistributionGame,
  GameDistributionMyReviewResponse,
  GameDistributionRecoveryAction,
  GameDistributionReviewsResponse,
  GameDistributionSaveReviewRequest,
  GameDistributionSaveReviewResponse,
  GameDistributionUpdateGameMetadataRequest,
  GameDistributionSetForkAuthorizationRequest,
  GameDistributionVersionDetail,
  GameDistributionVersionStatus as GameDistributionVersionStatusValue,
  GameDistributionVersionSummary,
} from '../../packages/shared/src/contracts/gameDistribution';
import {
  type ApiRequestOptions,
  BACKGROUND_AUTH_REQUEST_OPTIONS,
  requestJson as requestApiJson,
} from './apiClient';
import { getGamePlayClientId } from './gamePlayClientId';

export type {
  GameDistributionAuthor,
  GameDistributionDeviceSupport,
  GameDistributionForkAuthorization,
  GameDistributionGame,
  GameDistributionInputMode,
  GameDistributionLineage,
  GameDistributionRatingSummary,
  GameDistributionRecoveryAction,
  GameDistributionReview,
  GameDistributionReviewsResponse,
  GameDistributionVersionDetail,
  GameDistributionVersionSummary,
} from '../../packages/shared/src/contracts/gameDistribution';

export type GameCategory = GameDistributionCategory;
export type GameDeviceSupport = GameDistributionDeviceSupport;
export type GameAuthor = GameDistributionAuthor;
export type GameVersionSummary = GameDistributionVersionSummary;

export type GameListQuery = {
  keyword?: string;
  category?: GameCategory | '全部';
};

export type GameVersionCreateResult = {
  gameId: string;
  versionId: string;
  versionNumber: number;
  status: 'awaiting_upload';
};

const API_BASE = '/api/game-distribution';

function normalizeGameList(value: unknown): GameDistributionGame[] {
  if (!Array.isArray(value)) return [];
  return value.filter((item): item is GameDistributionGame => {
    if (!item || typeof item !== 'object') return false;
    const game = item as Partial<GameDistributionGame>;
    return Boolean(game.id && game.title && game.currentVersion);
  });
}

const PUBLIC_GAME_REQUEST_OPTIONS: ApiRequestOptions = {
  skipAuth: true,
  skipRefresh: true,
  notifyAuthStateChange: false,
  clearAuthOnUnauthorized: false,
};

/**
 * 游玩上报是后台尽力而为的请求：带上已登录 bearer（后端据此按 userId 去重），但即使遇到 401
 * 也不刷新会话、不改动全局登录态——直接复用后台请求已有的同一份鉴权降级策略。
 */

async function requestJson<T>(
  path: string,
  init: RequestInit,
  fallbackMessage: string,
  options?: ApiRequestOptions,
) {
  return requestApiJson<T>(
    `${API_BASE}${path}`,
    {
      ...init,
      headers: {
        Accept: 'application/json',
        ...(init.body instanceof FormData ||
        (typeof Blob !== 'undefined' && init.body instanceof Blob) ||
        init.body instanceof ArrayBuffer
          ? {}
          : init.body
            ? { 'Content-Type': 'application/json' }
            : {}),
        ...init.headers,
      },
    },
    fallbackMessage,
    options,
  );
}

export async function listGames(query: GameListQuery = {}) {
  const params = new URLSearchParams();
  if (query.keyword?.trim()) params.set('keyword', query.keyword.trim());
  if (query.category && query.category !== '全部')
    params.set('category', query.category);
  const payload = await requestJson<unknown>(
    `/games${params.size ? `?${params.toString()}` : ''}`,
    { method: 'GET' },
    '读取游戏目录失败',
    PUBLIC_GAME_REQUEST_OPTIONS,
  );
  return normalizeGameList(
    Array.isArray(payload) ? payload : (payload as { games?: unknown[] }).games,
  );
}

export type GameDistributionMyGame = GameDistributionGame & {
  latestVersion: GameDistributionVersionStatusEntry | null;
  versions: GameDistributionVersionStatusEntry[];
};

export type GameDistributionVersionStatusEntry = {
  versionId: string;
  gameId: string;
  versionNumber: number;
  packageSha256: string;
  packageBytes: number;
  status: GameDistributionVersionStatusValue;
  publicationRevision: number;
  reviewReason?: string | null;
  createdAt: string;
  updatedAt: string;
  /**
   * 版本私有的发行入口；只有已公开版本有值，作者详情用它判定当前是否能在线游玩。
   */
  entryUrl?: string | null;
  /**
   * 服务端派生的下一步动作。作者列表投影目前不带这一项（只有版本回读带），
   * 缺失时前端只展示状态、不自行推断动作。
   */
  recoveryAction?: GameDistributionRecoveryAction | null;
};

/**
 * 作者自有游戏条目一定是「公开投影 + 私有版本状态」的形状；服务端缺字段时按空值兜底，
 * 避免页面对半成品响应直接崩掉。
 */
function normalizeOwnerGameEntry(
  value: unknown,
): GameDistributionMyGame | null {
  if (!value || typeof value !== 'object') return null;
  const entry = value as Partial<GameDistributionMyGame>;
  if (!entry.id) return null;
  const versions = Array.isArray(entry.versions)
    ? entry.versions.filter(
        (item): item is GameDistributionVersionStatusEntry =>
          Boolean(item && typeof item === 'object' && item.versionId),
      )
    : [];
  return {
    ...(entry as GameDistributionMyGame),
    latestVersion: entry.latestVersion ?? null,
    versions,
  };
}

export async function listMyGames() {
  const payload = await requestJson<{ games?: unknown[] }>(
    '/my-games',
    { method: 'GET' },
    '读取我的游戏失败',
  );
  const games = Array.isArray(payload?.games) ? payload.games : [];
  return games
    .map(normalizeOwnerGameEntry)
    .filter((game): game is GameDistributionMyGame => game !== null);
}

/**
 * 作者读取自己名下单个作品：审核中 / 被驳回 / 已下架 / 已撤回的作品都能打开，
 * 公开详情只服务已公开投影（作者点自己的未公开作品会拿到 404）。
 */
export async function getMyGame(
  gameId: string,
): Promise<GameDistributionMyGame | null> {
  const normalizedGameId = gameId.trim();
  if (!normalizedGameId) return null;
  const payload = await requestJson<{ game?: unknown }>(
    `/my-games/${encodeURIComponent(normalizedGameId)}`,
    { method: 'GET' },
    '读取作品详情失败',
  );
  return normalizeOwnerGameEntry(payload?.game);
}

/**
 * 保存作品资料的成功响应：`game` 是公开投影形状（不含版本列表），
 * `replayed` 表示服务端按同一个 Idempotency-Key 重放了这次写入。
 */
export type GameDistributionUpdateMyGameResponse = {
  game: GameDistributionGame;
  replayed: boolean;
};

/**
 * 保存作品展示资料；包内容不在这里改动，仍随版本冻结。
 *
 * 服务端复用创建游戏的资料校验（含"必须有封面、截图必须是本人素材"），
 * 因此编辑也必须带上当前封面/截图的素材 ID，否则资料不完整或会把线上截图清空。
 */
export async function updateMyGame(
  gameId: string,
  payload: GameDistributionUpdateGameMetadataRequest,
  idempotencyKey: string,
) {
  const normalizedGameId = gameId.trim();
  const normalizedKey = idempotencyKey.trim();
  if (!normalizedGameId) throw new Error('缺少作品编号');
  if (!normalizedKey) throw new Error('保存作品资料缺少幂等键');
  return requestJson<GameDistributionUpdateMyGameResponse>(
    `/my-games/${encodeURIComponent(normalizedGameId)}`,
    {
      method: 'PATCH',
      headers: { 'Idempotency-Key': normalizedKey },
      body: JSON.stringify(payload),
    },
    '保存作品资料失败',
  );
}

/**
 * 软删除作品：成功后该作品从作者列表与公开投影里消失，历史版本包留在回收窗口内。
 *
 * 与其它写动作一致要带 `Idempotency-Key`；CAS 修订号走查询串（删除本身没有请求体），
 * 并发下架/审核后过期由服务端拒绝。
 */
export async function deleteMyGame(
  gameId: string,
  expectedPublicationRevision: number,
  idempotencyKey: string,
) {
  const normalizedGameId = gameId.trim();
  const normalizedKey = idempotencyKey.trim();
  if (!normalizedGameId) throw new Error('缺少作品编号');
  if (!normalizedKey) throw new Error('删除作品缺少幂等键');
  const params = new URLSearchParams({
    expectedPublicationRevision: String(expectedPublicationRevision),
  });
  return requestJson<{ game?: GameDistributionGame; replayed?: boolean }>(
    `/my-games/${encodeURIComponent(normalizedGameId)}?${params.toString()}`,
    {
      method: 'DELETE',
      headers: { 'Idempotency-Key': normalizedKey },
    },
    '删除作品失败',
  );
}

/**
 * 补读版本回读里的 `recoveryAction`。
 *
 * 作者列表投影不带这一步动作，只为「还需要作者动作」的最新版本各回读一次；单个版本
 * 回读失败只丢失该版本的下一步提示，不影响列表与其它作品。
 */
export async function loadVersionRecoveryActions(
  versionIds: readonly string[],
): Promise<Record<string, GameDistributionRecoveryAction>> {
  const uniqueVersionIds = [
    ...new Set(versionIds.map((versionId) => versionId.trim()).filter(Boolean)),
  ];
  const details = await Promise.allSettled(
    uniqueVersionIds.map((versionId) => getGameVersion(versionId)),
  );
  const actions: Record<string, GameDistributionRecoveryAction> = {};
  uniqueVersionIds.forEach((versionId, index) => {
    const detail = details[index];
    if (detail?.status === 'fulfilled') {
      actions[versionId] = detail.value.version.recoveryAction;
    }
  });
  return actions;
}

export async function unpublishGame(
  gameId: string,
  expectedPublicationRevision: number,
  idempotencyKey: string,
) {
  const normalizedGameId = gameId.trim();
  const normalizedKey = idempotencyKey.trim();
  if (!normalizedGameId) throw new Error('缺少游戏编号');
  if (!normalizedKey) throw new Error('缺少幂等键');
  return requestJson<{ game: { id: string; status: string } }>(
    `/games/${encodeURIComponent(normalizedGameId)}/unpublish`,
    {
      method: 'POST',
      headers: { 'Idempotency-Key': normalizedKey },
      body: JSON.stringify({ expectedPublicationRevision }),
    },
    '下架游戏失败',
  );
}

/**
 * 提升作品共创授权（只升不降）。`expectedForkAuthorization` 为 CAS 期望值，
 * 服务端发现档位冲突或降级时返回 409，错误信息由 `requestJson` 透传。
 */
export async function updateGameForkAuthorization(
  gameId: string,
  forkAuthorization: GameDistributionForkAuthorization,
  expectedForkAuthorization: GameDistributionForkAuthorization,
  idempotencyKey: string,
) {
  const normalizedGameId = gameId.trim();
  const normalizedKey = idempotencyKey.trim();
  if (!normalizedGameId) throw new Error('缺少游戏编号');
  if (!normalizedKey) throw new Error('设置共创授权缺少幂等键');
  const payload: GameDistributionSetForkAuthorizationRequest = {
    expectedForkAuthorization,
    forkAuthorization,
  };
  return requestJson<{
    ok?: boolean;
    replayed?: boolean;
    game: {
      id: string;
      forkAuthorization?: GameDistributionForkAuthorization;
    };
  }>(
    `/games/${encodeURIComponent(normalizedGameId)}/fork-authorization`,
    {
      method: 'PUT',
      headers: { 'Idempotency-Key': normalizedKey },
      body: JSON.stringify(payload),
    },
    '设置共创授权失败',
  );
}

export async function getGame(gameId: string) {
  const normalizedId = gameId.trim();
  if (!normalizedId) return null;
  return requestJson<GameDistributionGame>(
    `/games/${encodeURIComponent(normalizedId)}`,
    { method: 'GET' },
    '读取游戏详情失败',
    PUBLIC_GAME_REQUEST_OPTIONS,
  );
}

/**
 * 上报一次「开始游戏」。调用方按 fire-and-forget 处理：失败只静默忽略，绝不阻断进入游戏。
 */
export function recordGamePlay(
  gameId: string,
): Promise<{ recorded?: boolean }> {
  const normalizedId = gameId.trim();
  if (!normalizedId) return Promise.resolve({ recorded: false });
  return requestJson<{ recorded?: boolean }>(
    `/games/${encodeURIComponent(normalizedId)}/plays`,
    {
      method: 'POST',
      cache: 'no-store',
      body: JSON.stringify({ clientId: getGamePlayClientId() }),
    },
    '游玩上报失败',
    BACKGROUND_AUTH_REQUEST_OPTIONS,
  );
}

export function listGameReviews(gameId: string, page = 1) {
  return requestJson<GameDistributionReviewsResponse>(
    `/games/${encodeURIComponent(gameId)}/reviews?page=${page}&pageSize=20`,
    { method: 'GET', cache: 'no-store' },
    '读取游戏评价失败',
    PUBLIC_GAME_REQUEST_OPTIONS,
  );
}

export function getMyGameReview(gameId: string) {
  return requestJson<GameDistributionMyReviewResponse>(
    `/games/${encodeURIComponent(gameId)}/my-review`,
    { method: 'GET', cache: 'no-store' },
    '读取我的评价失败',
  );
}

export function saveMyGameReview(
  gameId: string,
  payload: GameDistributionSaveReviewRequest,
) {
  return requestJson<GameDistributionSaveReviewResponse>(
    `/games/${encodeURIComponent(gameId)}/my-review`,
    { method: 'PUT', cache: 'no-store', body: JSON.stringify(payload) },
    '保存评价失败',
  );
}

export async function createGame(
  payload: GameDistributionCreateGameRequest,
  idempotencyKey: string,
) {
  const normalizedKey = idempotencyKey.trim();
  if (!normalizedKey) throw new Error('创建游戏缺少幂等键');
  return requestJson<GameDistributionGame>(
    '/games',
    {
      method: 'POST',
      headers: { 'Idempotency-Key': normalizedKey },
      body: JSON.stringify(payload),
    },
    '创建游戏失败',
  );
}

export async function createGameVersion(
  gameId: string,
  payload: GameDistributionCreateVersionRequest,
  idempotencyKey: string,
) {
  const normalizedGameId = gameId.trim();
  const normalizedIdempotencyKey = idempotencyKey.trim();
  if (!normalizedGameId || !normalizedIdempotencyKey) {
    throw new Error('游戏版本创建缺少必要标识');
  }
  return requestJson<GameVersionCreateResult>(
    `/games/${encodeURIComponent(normalizedGameId)}/versions`,
    {
      method: 'POST',
      headers: { 'Idempotency-Key': normalizedIdempotencyKey },
      body: JSON.stringify(payload),
    },
    '创建游戏版本失败',
  );
}

/** 回读单个版本状态、驳回理由与服务端给出的恢复动作。 */
export async function getGameVersion(versionId: string) {
  const normalizedVersionId = versionId.trim();
  if (!normalizedVersionId) throw new Error('缺少版本编号');
  return requestJson<GameDistributionVersionDetail>(
    `/versions/${encodeURIComponent(normalizedVersionId)}`,
    { method: 'GET' },
    '读取版本状态失败',
  );
}

/** 撤回尚未公开的版本；幂等键由调用方生成，重复提交返回同一结果。 */
export async function cancelGameVersion(
  versionId: string,
  expectedPublicationRevision: number,
  idempotencyKey: string,
  reason?: string,
) {
  const normalizedVersionId = versionId.trim();
  const normalizedKey = idempotencyKey.trim();
  if (!normalizedVersionId) throw new Error('撤回版本缺少版本编号');
  if (!normalizedKey) throw new Error('撤回版本缺少幂等键');
  const normalizedReason = reason?.trim();
  return requestJson<GameDistributionCancelVersionResponse>(
    `/versions/${encodeURIComponent(normalizedVersionId)}/cancel`,
    {
      method: 'POST',
      headers: { 'Idempotency-Key': normalizedKey },
      body: JSON.stringify({
        expectedPublicationRevision,
        ...(normalizedReason ? { reason: normalizedReason } : {}),
      }),
    },
    '撤回版本失败',
  );
}

export async function submitGameVersion(
  versionId: string,
  expectedPublicationRevision: number,
  idempotencyKey: string,
) {
  const normalizedVersionId = versionId.trim();
  const normalizedKey = idempotencyKey.trim();
  if (!normalizedVersionId) throw new Error('提交审核缺少版本 ID');
  if (!normalizedKey) throw new Error('提交审核缺少幂等键');
  return requestJson<{ version?: { status?: string } }>(
    `/versions/${encodeURIComponent(normalizedVersionId)}/submit`,
    {
      method: 'POST',
      headers: { 'Idempotency-Key': normalizedKey },
      body: JSON.stringify({ expectedPublicationRevision }),
    },
    '提交审核失败',
  );
}

export async function uploadGamePackage(
  versionId: string,
  packageBody: Blob | ArrayBuffer,
  idempotencyKey: string,
) {
  const normalizedVersionId = versionId.trim();
  const normalizedIdempotencyKey = idempotencyKey.trim();
  if (!normalizedVersionId || !normalizedIdempotencyKey) {
    throw new Error('游戏发行包上传缺少必要标识');
  }
  return requestJson<{ versionId: string; status: 'uploaded' }>(
    `/versions/${encodeURIComponent(normalizedVersionId)}/package`,
    {
      method: 'PUT',
      headers: {
        'Content-Type': 'application/zip',
        'Idempotency-Key': normalizedIdempotencyKey,
      },
      body: packageBody,
    },
    '上传游戏发行包失败',
  );
}