// 电商平台规格 + 市场语言业务数据客户端（AGENTS.md 规则4合规）。
// 数据由后端 GET /api/public/config/profile?name=web-ecommerce-platform-rules 下发，
// 不硬编码在前端业务逻辑里。
//
// 时序设计（启动 gating）：App 启动 boot splash 期间 await preloadPlatformRules()，
// 数据就绪后才渲染 EcommercePage（React.lazy）。因此 platformRules.ts 模块求值时
// （随 EcommercePage chunk 加载）缓存已填充，其顶层派生常量拿到的是 API 数据。
//
// FALLBACK = 完整当前生产数据：API 超时/失败时仍能正常工作（fallback 即正确值）。
import type { EcommercePlatformSpec } from "../features/ecommerce/utils/platformRules";
import { serverRequest } from "./serverConnection";

export interface MarketLanguageOption {
  country: string;
  languages: string[];
}

export interface PlatformRulesData {
  platformSpecOptions: EcommercePlatformSpec[];
  marketLanguageOptions: MarketLanguageOption[];
  languageAliases: Record<string, string>;
  legacyPlatformAliases: Record<string, string>;
  domesticPlatformLabels: string[];
  domesticPlatformLanguages: string[];
  defaultEcommercePlatform: string;
}

// ── FALLBACK：完整当前数据，逐字迁移自原 platformRules.ts ──────────────
const FALLBACK_PLATFORM_RULES: PlatformRulesData = {
  platformSpecOptions: [
    {
      label: "淘宝/天猫",
      ratios: ["淘宝主图 / SKU 图 800×800px", "详情页宽 750px", "详情页宽 790px"],
      defaultRatio: "淘宝主图 / SKU 图 800×800px",
      ratioGroups: {
        set: {
          ratios: ["1000×1000px\u00a0\u00a0\u00a01:1", "800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "1000×1000px\u00a0\u00a0\u00a01:1",
        },
        detail: {
          ratios: [
            "750×1000px\u00a0\u00a0\u00a03:4",
            "790×1053px\u00a0\u00a0\u00a03:4",
            "750×1125px\u00a0\u00a0\u00a02:3",
            "790×1185px\u00a0\u00a0\u00a02:3",
          ],
          defaultRatio: "750×1000px\u00a0\u00a0\u00a03:4",
        },
        model: {
          ratios: ["750×1000px\u00a0\u00a0\u00a03:4"],
          defaultRatio: "750×1000px\u00a0\u00a0\u00a03:4",
        },
        video: {
          ratios: ["1080×1920px\u00a0\u00a0\u00a09:16", "1080×1440px\u00a0\u00a0\u00a03:4", "1080×1080px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "1080×1920px\u00a0\u00a0\u00a09:16",
        },
        hot: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
      },
      specs: ["主图 / SKU 图 800×800px，≤3MB", "详情页宽 750px 或 790px，单张高度≤1546px"],
      tip: "建议主图 200-400KB JPG，超过 500KB 会影响加载速度。",
    },
    {
      label: "京东",
      ratios: ["京东主图 / SKU 图 800×800px", "详情页宽 750px", "首图主体占比 ≥80%"],
      defaultRatio: "京东主图 / SKU 图 800×800px",
      ratioGroups: {
        set: {
          ratios: ["1000×1000px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "1000×1000px\u00a0\u00a0\u00a01:1",
        },
        detail: {
          ratios: [
            "750×1000px\u00a0\u00a0\u00a03:4",
            "990×1320px\u00a0\u00a0\u00a03:4",
            "750×1125px\u00a0\u00a0\u00a02:3",
            "990×1485px\u00a0\u00a0\u00a02:3",
          ],
          defaultRatio: "750×1000px\u00a0\u00a0\u00a03:4",
        },
        model: {
          ratios: ["750×1125px\u00a0\u00a0\u00a02:3", "990×1485px\u00a0\u00a0\u00a02:3"],
          defaultRatio: "750×1125px\u00a0\u00a0\u00a02:3",
        },
        video: {
          ratios: ["1080×1920px\u00a0\u00a0\u00a09:16", "1920×1080px\u00a0\u00a0\u00a016:9"],
          defaultRatio: "1080×1920px\u00a0\u00a0\u00a09:16",
        },
        hot: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
      },
      specs: ["主图 / SKU 图 800×800px，白底，≤3MB", "详情页宽 750px，首图主体占比 ≥80%"],
    },
    {
      label: "拼多多",
      ratios: ["主图 750×352px", "主图 800×800px", "详情页宽 750px"],
      defaultRatio: "主图 750×352px",
      ratioGroups: {
        set: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1", "750×1000px\u00a0\u00a0\u00a03:4"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
        detail: {
          ratios: ["750×1000px\u00a0\u00a0\u00a03:4", "750×1125px\u00a0\u00a0\u00a02:3"],
          defaultRatio: "750×1000px\u00a0\u00a0\u00a03:4",
        },
        model: {
          ratios: ["750×1000px\u00a0\u00a0\u00a03:4"],
          defaultRatio: "750×1000px\u00a0\u00a0\u00a03:4",
        },
        video: {
          ratios: ["1080×1920px\u00a0\u00a0\u00a09:16"],
          defaultRatio: "1080×1920px\u00a0\u00a0\u00a09:16",
        },
        hot: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
      },
      specs: ["主图 750×352px 或 800×800px，≤1MB", "详情页宽 750px，要求纯白底、无水印、无拼接"],
    },
    {
      label: "抖音电商",
      ratios: ["短视频1080×1920px"],
      defaultRatio: "短视频1080×1920px",
      ratioGroups: {
        video: {
          ratios: ["1080×1920px\u00a0\u00a0\u00a09:16"],
          defaultRatio: "1080×1920px\u00a0\u00a0\u00a09:16",
        },
        hot: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
      },
      specs: ["短视频 1080×1920px，9:16", "30s 内最佳"],
    },
    {
      label: "亚马逊 Amazon",
      ratios: ["主图 ≥1600×1600px", "建议 2000×2000px+", "最小 500×500px"],
      defaultRatio: "主图 ≥1600×1600px",
      ratioGroups: {
        set: {
          ratios: ["1600×1600px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "1600×1600px\u00a0\u00a0\u00a01:1",
        },
        detail: {
          ratios: ["1600×1600px\u00a0\u00a0\u00a01:1", "1200×1800px\u00a0\u00a0\u00a02:3", "1200×1600px\u00a0\u00a0\u00a03:4"],
          defaultRatio: "1200×1800px\u00a0\u00a0\u00a02:3",
        },
        model: {
          ratios: ["1200×1800px\u00a0\u00a0\u00a02:3"],
          defaultRatio: "1200×1800px\u00a0\u00a0\u00a02:3",
        },
        video: {
          ratios: ["1920×1080px\u00a0\u00a0\u00a016:9"],
          defaultRatio: "1920×1080px\u00a0\u00a0\u00a016:9",
        },
        hot: {
          ratios: ["1600×1600px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "1600×1600px\u00a0\u00a0\u00a01:1",
        },
      },
      specs: ["主图 1600×1600px+，纯白底，≤10MB", "最小 500×500px，建议 2000px+ 以支持缩放"],
      aliases: ["亚马逊"],
    },
    {
      label: "Shopee",
      ratios: ["商品主图 1024×1024px", "基础主图 800×800px"],
      defaultRatio: "商品主图 1024×1024px",
      ratioGroups: {
        set: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
        detail: {
          ratios: ["750×1000px\u00a0\u00a0\u00a03:4", "750×1125px\u00a0\u00a0\u00a02:3"],
          defaultRatio: "750×1000px\u00a0\u00a0\u00a03:4",
        },
        model: {
          ratios: ["750×1000px\u00a0\u00a0\u00a03:4"],
          defaultRatio: "750×1000px\u00a0\u00a0\u00a03:4",
        },
        video: {
          ratios: ["1080×1920px\u00a0\u00a0\u00a09:16"],
          defaultRatio: "1080×1920px\u00a0\u00a0\u00a09:16",
        },
        hot: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
      },
      specs: ["商品主图推荐 1024×1024px，基础 800×800px", "≤2MB，白底或浅色底"],
      aliases: ["虾皮 Shopee/Lazada", "虾皮"],
    },
    {
      label: "Lazada",
      ratios: ["商品主图 800×800px"],
      defaultRatio: "商品主图 800×800px",
      ratioGroups: {
        set: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
        detail: {
          ratios: ["750×1000px\u00a0\u00a0\u00a03:4", "750×1125px\u00a0\u00a0\u00a02:3"],
          defaultRatio: "750×1000px\u00a0\u00a0\u00a03:4",
        },
        model: {
          ratios: ["750×1000px\u00a0\u00a0\u00a03:4"],
          defaultRatio: "750×1000px\u00a0\u00a0\u00a03:4",
        },
        video: {
          ratios: ["1080×1920px\u00a0\u00a0\u00a09:16"],
          defaultRatio: "1080×1920px\u00a0\u00a0\u00a09:16",
        },
        hot: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
      },
      specs: ["商品主图 800×800px，1:1"],
    },
    {
      label: "Instagram",
      ratios: ["帖子 1080×1350px", "帖子 1080×1080px", "Stories / Reels 1080×1920px", "头像 320×320px"],
      defaultRatio: "帖子 1080×1350px",
      ratioGroups: {
        set: {
          ratios: ["1080×1080px\u00a0\u00a0\u00a01:1", "1080×1350px\u00a0\u00a0\u00a04:5"],
          defaultRatio: "1080×1080px\u00a0\u00a0\u00a01:1",
        },
        detail: {
          ratios: ["1080×1350px\u00a0\u00a0\u00a04:5"],
          defaultRatio: "1080×1350px\u00a0\u00a0\u00a04:5",
        },
        model: {
          ratios: ["1080×1350px\u00a0\u00a0\u00a04:5"],
          defaultRatio: "1080×1350px\u00a0\u00a0\u00a04:5",
        },
        video: {
          ratios: ["1080×1920px\u00a0\u00a0\u00a09:16", "1080×1350px\u00a0\u00a0\u00a04:5"],
          defaultRatio: "1080×1920px\u00a0\u00a0\u00a09:16",
        },
      },
      specs: ["帖子 1080×1350px 或 1080×1080px", "Stories / Reels 封面 1080×1920px，头像 320×320px"],
      tip: "建议 ≤8MB JPG。",
      aliases: ["Instagram Reels"],
    },
    {
      label: "速卖通",
      ratios: ["主图 800×800px", "主图 1000×1000px+"],
      defaultRatio: "主图 800×800px",
      ratioGroups: {
        set: {
          ratios: ["1000×1000px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "1000×1000px\u00a0\u00a0\u00a01:1",
        },
        detail: {
          ratios: ["750×1125px\u00a0\u00a0\u00a02:3", "750×1000px\u00a0\u00a0\u00a03:4"],
          defaultRatio: "750×1125px\u00a0\u00a0\u00a02:3",
        },
        model: {
          ratios: ["750×1125px\u00a0\u00a0\u00a02:3"],
          defaultRatio: "750×1125px\u00a0\u00a0\u00a02:3",
        },
        video: {
          ratios: ["1080×1920px\u00a0\u00a0\u00a09:16", "1920×1080px\u00a0\u00a0\u00a016:9"],
          defaultRatio: "1080×1920px\u00a0\u00a0\u00a09:16",
        },
        hot: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
      },
      specs: ["主图建议 800×800px 或更高，1:1", "适合跨境电商主图、SKU 图和场景图"],
    },
    {
      label: "eBay",
      ratios: ["商品图1:1", "白底多角度展示图 1:1"],
      defaultRatio: "商品图1:1",
      ratioGroups: {
        set: {
          ratios: ["1600×1600px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "1600×1600px\u00a0\u00a0\u00a01:1",
        },
        detail: {
          ratios: ["1000×1500px\u00a0\u00a0\u00a02:3", "1200×1600px\u00a0\u00a0\u00a03:4"],
          defaultRatio: "1000×1500px\u00a0\u00a0\u00a02:3",
        },
        model: {
          ratios: ["1000×1500px\u00a0\u00a0\u00a02:3"],
          defaultRatio: "1000×1500px\u00a0\u00a0\u00a02:3",
        },
        video: {
          ratios: ["1920×1080px\u00a0\u00a0\u00a016:9", "1080×1920px\u00a0\u00a0\u00a09:16"],
          defaultRatio: "1920×1080px\u00a0\u00a0\u00a016:9",
        },
        hot: {
          ratios: ["1600×1600px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "1600×1600px\u00a0\u00a0\u00a01:1",
        },
      },
      specs: ["商品图建议 1:1，主体清晰居中", "适合白底主图和多角度展示图"],
    },
    {
      label: "TikTok Shop",
      ratios: ["商品主图 1:1", "短视频/ 竖版封面 9:16"],
      defaultRatio: "商品主图 1:1",
      ratioGroups: {
        set: {
          ratios: ["1280×1280px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "1280×1280px\u00a0\u00a0\u00a01:1",
        },
        detail: {
          ratios: ["1080×1350px\u00a0\u00a0\u00a04:5"],
          defaultRatio: "1080×1350px\u00a0\u00a0\u00a04:5",
        },
        model: {
          ratios: ["1080×1350px\u00a0\u00a0\u00a04:5"],
          defaultRatio: "1080×1350px\u00a0\u00a0\u00a04:5",
        },
        video: {
          ratios: ["1080×1920px\u00a0\u00a0\u00a09:16"],
          defaultRatio: "1080×1920px\u00a0\u00a0\u00a09:16",
        },
        hot: {
          ratios: ["800×800px\u00a0\u00a0\u00a01:1"],
          defaultRatio: "800×800px\u00a0\u00a0\u00a01:1",
        },
      },
      specs: ["商品主图建议 1:1", "短视频竖版封面建议 9:16"],
    },
  ],
  marketLanguageOptions: [
    { country: "中国", languages: ["中文"] },
    { country: "美国", languages: ["英文"] },
    { country: "加拿大", languages: ["英文", "法文"] },
    { country: "英国", languages: ["英文"] },
    { country: "德国", languages: ["德文"] },
    { country: "法国", languages: ["法文"] },
    { country: "意大利", languages: ["意大利语"] },
    { country: "西班牙", languages: ["西班牙语"] },
    { country: "日本", languages: ["日文"] },
    { country: "韩国", languages: ["韩文"] },
    { country: "澳大利亚", languages: ["英文"] },
    { country: "新加坡", languages: ["英文", "中文"] },
    { country: "马来西亚", languages: ["马来语", "英文", "中文"] },
    { country: "印尼", languages: ["印度尼西亚语", "英文"] },
    { country: "越南", languages: ["越南语", "英文"] },
    { country: "泰国", languages: ["泰语", "英文"] },
    { country: "菲律宾", languages: ["菲律宾语（他加禄语）", "英文"] },
    { country: "巴西", languages: ["葡萄牙语"] },
    { country: "墨西哥", languages: ["西班牙语"] },
    { country: "智利", languages: ["西班牙语"] },
    { country: "哥伦比亚", languages: ["西班牙语"] },
    { country: "阿联酋", languages: ["阿拉伯语", "英文"] },
    { country: "沙特阿拉伯", languages: ["阿拉伯语", "英文"] },
    { country: "俄罗斯", languages: ["俄语"] },
    { country: "波兰", languages: ["波兰语"] },
  ],
  languageAliases: {
    "英文": "英文",
    "中文": "中文",
    "英语": "英文",
    "日语": "日文",
    "日文": "日文",
    "德语": "德文",
    "德文": "德文",
    "法语": "法文",
    "法文": "法文",
    "韩语": "韩文",
    "韩文": "韩文",
    "西文": "西班牙语",
    "西班牙语": "西班牙语",
    "葡文": "葡萄牙语",
    "葡萄牙语": "葡萄牙语",
    "印尼语": "印度尼西亚语",
    "印度尼西亚语": "印度尼西亚语",
    "菲律宾语": "菲律宾语（他加禄语）",
    "菲律宾语（他加禄语）": "菲律宾语（他加禄语）",
  },
  legacyPlatformAliases: {
    "淘宝/天猫": "淘宝/天猫",
    "京东": "京东",
    "拼多多": "拼多多",
    "抖音电商": "抖音电商",
    "亚马逊Amazon": "亚马逊 Amazon",
    "速卖通": "速卖通",
  },
  domesticPlatformLabels: ["淘宝/天猫", "京东", "拼多多", "抖音电商"],
  domesticPlatformLanguages: ["中文"],
  defaultEcommercePlatform: "淘宝/天猫",
};

interface PlatformRulesPayload {
  name: string;
  config: Partial<PlatformRulesData>;
}

let cached: PlatformRulesData | null = null;
let loadPromise: Promise<PlatformRulesData> | null = null;

function isNonEmptyArray(value: unknown): boolean {
  return Array.isArray(value) && value.length > 0;
}

// 合并 API 返回与 fallback：仅当 API 字段有效（非空）时覆盖，避免后端漏配某字段导致 UI 空白。
function mergeWithFallback(config: Partial<PlatformRulesData>): PlatformRulesData {
  return {
    platformSpecOptions: isNonEmptyArray(config.platformSpecOptions)
      ? (config.platformSpecOptions as EcommercePlatformSpec[])
      : FALLBACK_PLATFORM_RULES.platformSpecOptions,
    marketLanguageOptions: isNonEmptyArray(config.marketLanguageOptions)
      ? (config.marketLanguageOptions as MarketLanguageOption[])
      : FALLBACK_PLATFORM_RULES.marketLanguageOptions,
    languageAliases:
      config.languageAliases && typeof config.languageAliases === "object"
        ? config.languageAliases
        : FALLBACK_PLATFORM_RULES.languageAliases,
    legacyPlatformAliases:
      config.legacyPlatformAliases && typeof config.legacyPlatformAliases === "object"
        ? config.legacyPlatformAliases
        : FALLBACK_PLATFORM_RULES.legacyPlatformAliases,
    domesticPlatformLabels: isNonEmptyArray(config.domesticPlatformLabels)
      ? (config.domesticPlatformLabels as string[])
      : FALLBACK_PLATFORM_RULES.domesticPlatformLabels,
    domesticPlatformLanguages: isNonEmptyArray(config.domesticPlatformLanguages)
      ? (config.domesticPlatformLanguages as string[])
      : FALLBACK_PLATFORM_RULES.domesticPlatformLanguages,
    defaultEcommercePlatform:
      typeof config.defaultEcommercePlatform === "string" && config.defaultEcommercePlatform.trim()
        ? config.defaultEcommercePlatform
        : FALLBACK_PLATFORM_RULES.defaultEcommercePlatform,
  };
}

async function fetchPlatformRules(): Promise<PlatformRulesData> {
  const payload = await serverRequest<PlatformRulesPayload>(
    "public/config/profile?name=web-ecommerce-platform-rules",
    { maxRetries: 2, timeoutMs: 8_000, fallbackMessage: "加载电商平台规则失败" },
  );
  return mergeWithFallback(payload?.config ?? {});
}

/** 预加载平台规则。App 启动 gating 调用，await 其完成（带超时，失败用 fallback）。可安全重复调用。 */
export async function preloadPlatformRules(): Promise<void> {
  if (loadPromise) return loadPromise.then(() => undefined);
  loadPromise = fetchPlatformRules()
    .then((data) => {
      cached = data;
      return data;
    })
    .catch((error) => {
      console.warn("[platformRules] 加载失败，使用 fallback 数据", error);
      cached = null;
      loadPromise = null;
      return FALLBACK_PLATFORM_RULES;
    });
  return loadPromise.then(() => undefined);
}

/** 同步获取平台规则。未加载时返回 fallback（=当前生产值，永远可用）。 */
export function getPlatformRules(): PlatformRulesData {
  return cached ?? FALLBACK_PLATFORM_RULES;
}