export const API_URL = process.env.NEXT_PUBLIC_API_URL ?? "http://localhost:3002";

export interface MapPoint {
  id: string;
  name: string;
  category: string;
  level: string;
  dynasty: string;
  story_hook: string;
  lng: number;
  lat: number;
  institution_name: string;
  province?: string;
  city?: string;
  location_type?: string;
  image_url?: string | null;
  repatriation_status?: string;
}

export interface RouteStop {
  seq: number;
  name: string;
  lng: number;
  lat: number;
  year_label: string | null;
  event: string | null;
}
export interface RouteSummary {
  code: string;
  title: string;
  type: string; // migration | repatriation
  color: string | null;
  summary: string | null;
  artifact_id?: string | null;
  artifact_name?: string | null;
  artifact_dynasty?: string | null;
  artifact_category?: string | null;
  institution_name?: string | null;
}
export interface RouteDetail extends RouteSummary {
  stops: RouteStop[];
}

export type Theme = "domestic" | "overseas" | "repatriated";

export function themeOf(p: { location_type?: string; repatriation_status?: string }): Theme {
  if (p.repatriation_status === "repatriated") return "repatriated";
  if (p.repatriation_status === "lost_overseas" || p.location_type === "overseas") return "overseas";
  return "domestic";
}

export const REPATRIATION_LABELS: Record<string, string> = {
  domestic: "国内传承",
  lost_overseas: "流失海外",
  repatriated: "已回归",
  in_transit: "在途",
};

export const CATEGORY_LABELS: Record<string, string> = {
  bronze: "青铜器",
  painting_calligraphy: "书画",
  porcelain: "陶瓷",
  jade: "玉器",
  gold_silver: "金银器",
  lacquer: "漆木器",
  textile: "织绣",
  stone_carving: "石刻造像",
  wood_carving: "木雕",
  dunhuang: "敦煌遗珍",
  ancient_book: "古籍文献",
  other: "其他",
};

export const CATEGORY_MARKS: Record<string, string> = {
  bronze: "铜",
  painting_calligraphy: "画",
  porcelain: "瓷",
  jade: "玉",
  gold_silver: "金",
  lacquer: "漆",
  textile: "织",
  stone_carving: "石",
  wood_carving: "木",
  dunhuang: "敦",
  ancient_book: "书",
  other: "物",
};

export const LEVEL_LABELS: Record<string, string> = {
  level_1: "国家一级",
  level_2: "国家二级",
  level_3: "国家三级",
  general: "一般文物",
  unknown: "未定级",
};

export const DYNASTY_OPTIONS = [
  "商代",
  "西周",
  "春秋",
  "战国",
  "秦代",
  "汉代",
  "唐代",
  "五代",
  "北宋",
  "南宋",
  "元代",
  "明代",
  "清代",
];

// 根据缩放层级与聚合数量计算 marker 直径（像素）。
export function markerSizeFor(zoom: number, count: number): number {
  const z = Math.max(2, Math.min(18, zoom));
  const base = 13 + (z - 2) * 2.3;
  const countBonus = Math.min(15, Math.log2(count + 1) * 4);
  return Math.round(base + countBonus);
}

// 文物图片：优先用已下载到本地的静态图（同源、无需外网），
// 加载失败时组件会回退到原始直链，再回退到统一示意图。
export function artifactImageSrc(id: string, _hd = false): string {
  return `/artifacts/${id}.jpg`;
}

export function isOverseas(locationType?: string): boolean {
  return locationType === "overseas";
}