import type { DetailCreate, DetailPriceUnit, WanfaRouteCreate } from "@/types";

export function createEmptyWanfaRoute(): WanfaRouteCreate {
  return { title: "", subtitle: "", image: "", routeCount: 0, demandKeyword: "" };
}

export function compactWanfaRoute(draft: WanfaRouteCreate): WanfaRouteCreate {
  return {
    title: draft.title.trim(),
    subtitle: draft.subtitle.trim(),
    image: draft.image.trim(),
    routeCount: Number.isFinite(Number(draft.routeCount)) ? Math.max(0, Number(draft.routeCount)) : 0,
    demandKeyword: draft.demandKeyword.trim(),
  };
}

export function createEmptyDetail(): DetailCreate {
  return {
    key: "",
    eyebrow: "玩法路线",
    duration: "",
    title: "",
    subtitle: "",
    intro: "",
    highlights: [],
    included: [],
    excluded: [],
    notes: [],
    gallery: [],
    priceStartingValue: null,
    priceUnit: null,
    pricePeopleRange: "",
    priceDescription: "",
    conciergeAdvisorId: null,
    isActive: true,
  };
}

export function compactDetail(draft: DetailCreate): DetailCreate {
  return {
    key: draft.key.trim(),
    eyebrow: draft.eyebrow.trim(),
    duration: draft.duration.trim(),
    title: draft.title.trim(),
    subtitle: draft.subtitle.trim(),
    intro: draft.intro.trim(),
    highlights: compactList(draft.highlights),
    included: compactList(draft.included),
    excluded: compactList(draft.excluded),
    notes: compactList(draft.notes),
    gallery: compactList(draft.gallery),
    priceStartingValue: normalizePriceStartingValue(draft.priceStartingValue),
    priceUnit: normalizePriceUnit(draft.priceUnit),
    pricePeopleRange: draft.pricePeopleRange?.trim() || null,
    priceDescription: draft.priceDescription?.trim() || null,
    conciergeAdvisorId: draft.conciergeAdvisorId?.trim() || null,
    isActive: draft.isActive ?? true,
    ...(draft.sortOrder === undefined ? {} : { sortOrder: draft.sortOrder }),
  };
}

export function validateWanfaWrite(route: WanfaRouteCreate, detail: DetailCreate) {
  if (!route.title || !route.subtitle || !route.image || !route.demandKeyword) {
    return "请完整填写路线标题、副标题、封面和需求关键词。";
  }
  if (!isHttpUrl(route.image)) return "路线封面必须是有效的 HTTP(S) URL。";
  if (!Number.isInteger(route.routeCount) || route.routeCount < 0) {
    return "路线数量必须是大于等于 0 的整数。";
  }
  if (!detail.eyebrow || !detail.duration || !detail.title || !detail.subtitle || !detail.intro) {
    return "请完整填写详情眉标、时长、标题、副标题和详情介绍。";
  }
  if (detail.gallery.some((image) => !isHttpUrl(image))) return "详情图片必须是有效的 HTTP(S) URL。";
  if (detail.priceStartingValue !== null && detail.priceStartingValue !== undefined && !detail.priceUnit) {
    return "配置价格起始值时请选择价格单位。";
  }
  return null;
}

function normalizePriceStartingValue(value: number | null | undefined) {
  if (value === null || value === undefined || !Number.isFinite(Number(value))) return null;
  return Math.max(0, Number(Number(value).toFixed(2)));
}

function normalizePriceUnit(value: DetailPriceUnit | null | undefined): DetailPriceUnit | null {
  return value === "person" || value === "day" || value === "group" ? value : null;
}

function compactList(items: string[]) {
  return items.map((item) => item.trim()).filter(Boolean);
}

function isHttpUrl(value: string) {
  try {
    const url = new URL(value);
    return url.protocol === "http:" || url.protocol === "https:";
  } catch {
    return false;
  }
}