import parksData from "@/data/kodaira-parks.json";
import osmData from "@/data/parks-geojson";
import nearbyData from "@/data/kodaira-nearby-parks.json";
import facilitiesData from "@/data/kodaira-facilities.json";
import nearbyFacilitiesData from "@/data/kodaira-nearby-facilities.json";

export type Park = Record<string, string>;

function nearbyCentroid(feature: any): [number, number] {
  const g = feature.geometry;
  if (g.type === "Point") return [g.coordinates[1], g.coordinates[0]];
  const ring = g.type === "Polygon" ? g.coordinates[0] : g.coordinates[0][0];
  if (!ring?.length) return [0, 0];
  let lat = 0;
  let lon = 0;
  for (const [x, y] of ring) {
    lon += x;
    lat += y;
  }
  return [lat / ring.length, lon / ring.length];
}

function mapsQueryForNearby(name: string, city: string): string {
  return name ? (city && !name.startsWith(city) ? `${city}${name}` : name) : "";
}

// 「小平市小川町2-1325」→「小川町」。公共施設の住所から町名を取り出す。
function townFromAddress(address: string): string {
  const match = /^小平市(.+?)(?:\d|$)/.exec(address || "");
  return match ? match[1].trim() : "";
}

// 市境500m以内の市外公園。小平市の公園と同じ表に「市外」バッジ付きで並べる。
const nearbyRows: Park[] = ((nearbyData as any).features ?? []).map((f: any) => {
  const p = f.properties || {};
  const [lat, lon] = nearbyCentroid(f);
  const area = Math.round(Number(p.area_m2) || 0);
  const name = String(p.name || "").trim();
  const mapsQuery = name
    ? mapsQueryForNearby(name, String(p.city || ""))
    : `${lat},${lon}`;
  return {
    "公園名": name,
    "住所": p.city ? `${p.city}（市外）` : "市外",
    "町名": "市外",
    "面積㎡": area ? String(area) : "",
    "500㎡以上": "",
    "種別": "市外",
    "南西部指定管理": "",
    "トイレ": "",
    "水飲み場": "",
    "ベンチ・椅子": "",
    "テーブル": "",
    "シェルター等": String(p["シェルター等"] || ""),
    "防災用具": "",
    "ボール遊び": "",
    "遊具": "",
    "駐車場": "",
    "その他設備": "",
    "緯度": String(lat),
    "経度": String(lon),
    "備考": `市外・小平市境から約${Math.round(Number(p.distance_m) || 0)}m${
      f.geometry?.type === "Point" ? "・範囲未取得" : ""
    }`,
    "設置者": "市外",
    "状態": "",
    "地図キー": p.key || `${p.osm_type || ""}/${p.osm_id || ""}`,
    "時計": String(p["時計"] || ""),
    "地図URL": `https://www.google.com/maps/search/?api=1&query=${encodeURIComponent(mapsQuery)}`,
  };
});

// 市内・市外の公共施設を公園一覧と同じ行形式にする。
function facilityRow(f: any, nearby: boolean): Park {
  const name = String(f.name || "").trim();
  const type = String(f.type || "");
  const city = String(f.city || "").trim();
  const address = String(f.address || city || (nearby ? "市外" : "")).trim();
  const hours = f.hours ? `開館 ${f.hours}` : "";
  const closed = f.closed ? `休館 ${f.closed}` : "";
  const note = [type, hours, closed, f.note].filter(Boolean).join("。");
  const mapsQuery = nearby
    ? mapsQueryForNearby(name, city)
    : name.startsWith("小平市")
      ? name
      : `小平市${name}`;
  const toilet = f.toilet === "○" ? "○" : "";
  const water = f.water === "○" ? "○" : "";
  return {
    "公園名": name,
    "住所": address,
    "町名": nearby ? "市外" : townFromAddress(address),
    "面積㎡": "",
    "500㎡以上": "",
    "種別": type,
    "南西部指定管理": "",
    "トイレ": toilet,
    "水飲み場": "",
    "給水": water,
    "ベンチ・椅子": "",
    "テーブル": "",
    "シェルター等": String(f["シェルター等"] || ""),
    "防災用具": "",
    "ボール遊び": "",
    "遊具": "",
    "駐車場": "",
    "その他設備": "",
    "緯度": f.lat != null ? String(f.lat) : "",
    "経度": f.lon != null ? String(f.lon) : "",
    "備考": note,
    "設置者": nearby ? "市外" : "小平市",
    "状態": "",
    "地図URL": `https://www.google.com/maps/search/?api=1&query=${encodeURIComponent(mapsQuery)}`,
    "公式URL": String(f.source || ""),
    "施設": "1",
  };
}

const facilityRows: Park[] = [
  ...(facilitiesData as any[]).map((f) => facilityRow(f, false)),
  ...(nearbyFacilitiesData as any[]).map((f) => facilityRow(f, true)),
];

export const parks: Park[] = [
  ...(parksData as Park[]),
  ...nearbyRows,
  ...facilityRows,
];

export const total = parks.length;

export const towns = [...new Set(parks.map((p) => p["町名"]).filter(Boolean))].sort(
  (a, b) => a.localeCompare(b, "ja"),
);

// OpenStreetMapにポリゴンがあり、地図から位置を表示できる公園名。
export const mappedNames = new Set<string>([
  ...(osmData as any).features
    .map((f: any) => f.properties?.our_name)
    .filter(Boolean),
  ...((nearbyData as any).features ?? [])
    .map((f: any) => String(f.properties?.name || "").trim())
    .filter(Boolean),
]);