import {
  heroSlides as fallbackHeroSlides,
  resolveNetworkImage,
  vehicleOptions as fallbackVehicleOptions,
} from "@/content";
import type {
  AppData,
  PublicHomeCard,
  PublicSiteConfig,
  PublicVehicleService,
  VehicleOption,
} from "./types";

function normalizeActiveItems<T extends { isActive?: boolean; sortOrder?: number }>(items: T[] | undefined) {
  return (items ?? [])
    .filter((item) => item.isActive !== false)
    .sort((left, right) => (left.sortOrder ?? 0) - (right.sortOrder ?? 0));
}

export function normalizeHomeCards<T extends { id?: string; title: string; image: string; description: string }>(items: PublicHomeCard[] | undefined, fallback: T[]): T[] {
  const activeItems = normalizeActiveItems(items).filter((item) => item.title?.trim());
  if (!activeItems.length) return fallback;
  return activeItems.map((item, index) => {
    const fallbackItem = fallback[index] ?? fallback[0];
    return {
      ...fallbackItem,
      id: item.id,
      title: item.title.trim(),
      description: item.description?.trim() || fallbackItem.description,
      image: resolveNetworkImage(item.image, fallbackItem.image),
    } as T;
  });
}

export function normalizeSiteConfig(siteConfig: PublicSiteConfig, fallback: AppData): AppData {
  return {
    heroSlides: siteConfig.heroSlides?.length
      ? siteConfig.heroSlides.map((slide, index) => ({
          ...slide,
          image: resolveNetworkImage(
            slide.image,
            fallback.heroSlides[index]?.image ?? fallback.heroSlides[0]?.image ?? "",
          ),
          id: slide.id,
          kicker: slide.kicker,
          title: slide.title,
          actionLabel: slide.actionLabel,
          targetType: slide.targetType,
          targetValue: slide.targetValue,
        }))
      : fallback.heroSlides,
    vehicleOptions: normalizeHomeCards<VehicleOption>(siteConfig.vehicleOptions, fallback.vehicleOptions),
    vehicleService: fallback.vehicleService,
  };
}

const fallbackVehicleService: PublicVehicleService = {
  introTitle: "旅游出行专属用车服务",
  intro: "提交用车需求后由管家联系确认车型与服务安排。",
  serviceSections: [
    { title: "旅游专属包车", description: "适配家庭出游、朋友结伴和小团体旅行，行程可按需求沟通调整。" },
    { title: "多车型灵活选择", description: "按人数和行李情况匹配舒适轿车、SUV 或商务车。" },
  ],
  advantages: ["专为旅游定制", "按人数和行李匹配", "管家快速跟进"],
  processSteps: [
    { title: "提交需求", description: "填写日期、地点、人数和车型偏好。" },
    { title: "管家联系", description: "沟通车辆和服务安排。" },
    { title: "确认服务", description: "确认行程细节后按约定出行。" },
  ],
};

export const fallbackData: AppData = {
  heroSlides: fallbackHeroSlides,
  vehicleOptions: fallbackVehicleOptions.map((option) => ({ ...option })),
  vehicleService: fallbackVehicleService,
};

export function getSubmitErrorMessage(error: unknown) {
  return error instanceof Error && error.message ? error.message : "提交失败，请稍后再试。";
}

export function formatWan(value: number) {
  return Number.isFinite(value) ? value.toFixed(2).replace(/\.00$/, "") : "0";
}