export interface ApiResponse<T> {
  code: string;
  message: string;
  data: T;
}

export interface ListingResource {
  key: string;
  label: string;
  price: string;
  quantity: number;
  mode: string;
  /** 收费项小计（元），赠送为 0 */
  amount: number;
}

export interface Listing {
  id: number;
  listing_no?: string;
  title: string;
  description: string;
  game_name: string;
  server_region: string;
  login_platform: string;
  rank_level: string;
  haf_coin_amount: number;
  asset_summary?: Record<string, unknown>;
  screenshot_urls: string[];
  cover_url: string;
  price_cent: number;
  deposit_amount_cent: number;
  /** @deprecated 兼容旧字段，优先使用 price_cent */
  price?: number;
  /** @deprecated 兼容旧字段，优先使用 deposit_amount_cent */
  deposit_amount?: number;
  is_accelerated_sale?: boolean;
  in_transaction: boolean;
  published_at?: string;
}

export interface PublicListingPage {
  items: Listing[];
  total: number;
  page: number;
  page_size: number;
  zone_counts: Record<string, number>;
}

export interface PublicListingQuery {
  page?: number;
  page_size?: number;
  keyword?: string;
  sort?: string;
  zone?: string;
  login_method?: string;
  rank?: string;
  insurance?: string;
  stamina?: string;
  load?: string;
  skin_name?: string;
  min_coin?: number;
  max_coin?: number;
  min_price?: number;
  max_price?: number;
  min_secret_kd?: number;
  max_secret_kd?: number;
}

export interface HomeBannerSlide {
  eyebrow: string;
  title: string;
  badge: string;
  pill: string;
  tone: string;
  image_url?: string;
}

export interface ListingPublishOptions {
  server_options: string[];
  login_method_options: string[];
  rank_options: string[];
  insurance_options: string[];
  level_options: string[];
  skin_groups: Array<{
    key: string;
    title: string;
    options: string[];
  }>;
}

export interface MobileHomeConfig {
  announcements: string[];
  banners: HomeBannerSlide[];
  publish_options: ListingPublishOptions;
}

const apiBase = import.meta.env.VITE_API_BASE_URL || "/api";

export async function fetchListingsPage(query: PublicListingQuery) {
  return request<Partial<PublicListingPage>>("/listings", { ...query }).then((data) => ({
    items: Array.isArray(data.items) ? data.items : [],
    total: Number(data.total || 0),
    page: Number(data.page || query.page || 1),
    page_size: Number(data.page_size || query.page_size || 12),
    zone_counts: data.zone_counts && typeof data.zone_counts === "object" ? data.zone_counts : {},
  }));
}

export async function fetchMobileHomeConfig() {
  return request<Partial<MobileHomeConfig>>("/mobile-home-config").then((data) => ({
    announcements: normalizeStringArray(data.announcements),
    banners: normalizeBanners(data.banners),
    publish_options: normalizeOptions(data.publish_options),
  }));
}

function normalizeStringArray(value: unknown) {
  return Array.isArray(value) ? value.filter((item): item is string => typeof item === "string" && item.trim() !== "") : [];
}

function normalizeBanners(value: unknown): HomeBannerSlide[] {
  if (!Array.isArray(value)) return [];
  return value
    .filter((item): item is Partial<HomeBannerSlide> => typeof item === "object" && item !== null)
    .map((item) => ({
      eyebrow: item.eyebrow || "",
      title: item.title || "",
      badge: item.badge || "",
      pill: item.pill || "",
      tone: item.tone || "blue",
      image_url: item.image_url || "",
    }))
    .filter((item) => item.title || item.image_url);
}

function normalizeOptions(value: unknown): ListingPublishOptions {
  const options = typeof value === "object" && value !== null ? (value as Record<string, unknown>) : {};
  return {
    server_options: normalizeStringArray(options.server_options),
    login_method_options: normalizeStringArray(options.login_method_options),
    rank_options: normalizeStringArray(options.rank_options),
    insurance_options: normalizeStringArray(options.insurance_options),
    level_options: normalizeStringArray(options.level_options),
    skin_groups: normalizeSkinGroups(options.skin_groups),
  };
}

function normalizeSkinGroups(value: unknown) {
  if (!Array.isArray(value)) return [];
  return value
    .filter((item): item is Record<string, unknown> => typeof item === "object" && item !== null)
    .map((item) => ({
      key: typeof item.key === "string" ? item.key : "",
      title: typeof item.title === "string" ? item.title : "",
      options: normalizeStringArray(item.options),
    }))
    .filter((item) => item.key && item.title);
}

async function request<T>(path: string, query: Record<string, unknown> = {}) {
  const url = new URL(`${apiBase}${path}`, window.location.origin);
  Object.entries(query).forEach(([key, value]) => {
    if (value !== undefined && value !== null && value !== "") {
      url.searchParams.set(key, String(value));
    }
  });

  const response = await fetch(url);
  if (!response.ok) {
    throw new Error(`请求失败：${response.status}`);
  }
  const payload = (await response.json()) as ApiResponse<T>;
  return payload.data;
}