// ===============================
// Supabase 設定
// ===============================
const SUPABASE_URL = "https://ogtlmtnjkpsxsqzqlacj.supabase.co";
const SUPABASE_KEY =
  "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6Im9ndGxtdG5qa3BzeHNxenFsYWNqIiwicm9sZSI6ImFub24iLCJpYXQiOjE3NjMyOTU3NjUsImV4cCI6MjA3ODg3MTc2NX0.JnCE7oUQwrSgGqiu-QRbwnaLBZrO8JX1_RUb37VIMFI";

const supa = window.supabase.createClient(SUPABASE_URL, SUPABASE_KEY);

// ===============================
// デバイスIDを作成（永久に使う）
// ===============================
let deviceId = localStorage.getItem("deviceId");
if (!deviceId) {
  deviceId = crypto.randomUUID(); // ランダムで一生変わらないID
  localStorage.setItem("deviceId", deviceId);
}

// ===============================
// グローバル変数
// ===============================
let currentGroup = "";
let currentUser = "";
let map;
let userMarker;
let otherMarkers = [];
let reloadTimer;

// デフォルト位置
const DEFAULT_LAT = 35.685175;
const DEFAULT_LNG = 139.752799;

// ===============================
// URL の group と user を取得
// ===============================
function loadParams() {
  const params = new URLSearchParams(location.search);
  currentGroup = params.get("group") || "未指定";
  currentUser = params.get("user") || "名無し";

  document.getElementById("groupName").textContent = currentGroup;
  document.getElementById("userName").textContent = currentUser;
}

// ===============================
// アイコン（自分と他人）
// ===============================
const myIcon = L.icon({
  iconUrl: "https://maps.gstatic.com/mapfiles/ms2/micons/blue-dot.png",
  iconSize: [32, 32],
});

const otherIcon = L.icon({
  iconUrl: "https://maps.gstatic.com/mapfiles/ms2/micons/red-dot.png",
  iconSize: [32, 32],
});

// ===============================
// 現在地取得
// ===============================
function getPosition() {
  return new Promise((resolve, reject) => {
    navigator.geolocation.getCurrentPosition(
      (pos) => resolve(pos.coords),
      (err) => reject(err),
      { enableHighAccuracy: true }
    );
  });
}

// ===============================
// 地図を作る
// ===============================
function initMap(lat, lng) {
  map = L.map("map").setView([lat, lng], 15);

  L.tileLayer("https://tile.openstreetmap.org/{z}/{x}/{y}.png", {
    maxZoom: 19,
  }).addTo(map);

  userMarker = L.marker([lat, lng], { icon: myIcon }).addTo(map);
  userMarker.bindPopup(`あなた（${currentUser}）`);
}

// ===============================
// 自分の位置を「デバイスIDで1件だけ」保存
// ===============================
async function saveMyLocation(lat, lng) {
  // 自分の古いデータ削除（デバイスIDで判定）
  await supa
    .from("locations")
    .delete()
    .eq("group_name", currentGroup)
    .eq("device_id", deviceId);

  // 新しいデータを1件だけ保存
  await supa.from("locations").insert({
    group_name: currentGroup,
    user_name: currentUser,
    device_id: deviceId,   // ←これが重要！
    lat: lat,
    lng: lng,
  });
}

// ===============================
// 他ユーザーの最新のピンだけ表示
// ===============================
async function showOtherUsers() {
  const { data } = await supa
    .from("locations")
    .select("*")
    .eq("group_name", currentGroup)
    .order("updated_at", { ascending: false });

  // 古いマーカー消す
  otherMarkers.forEach((m) => map.removeLayer(m));
  otherMarkers = [];

  // device_id ごとに最新1件だけ残す
  const latestByDevice = {};
  for (const row of data) {
    if (!latestByDevice[row.device_id]) {
      latestByDevice[row.device_id] = row;
    }
  }

  // 表示
  Object.values(latestByDevice).forEach((row) => {
    // 自分のピンはスキップ
    if (row.device_id === deviceId) return;

    const mk = L.marker([row.lat, row.lng], { icon: otherIcon }).addTo(map);
    mk.bindPopup(`${row.user_name} さん<br>更新: ${row.updated_at}`);
    otherMarkers.push(mk);
  });
}

// ===============================
// main
// ===============================
async function main() {
  loadParams();

  let lat = DEFAULT_LAT;
  let lng = DEFAULT_LNG;

  try {
    const pos = await getPosition();
    lat = pos.latitude;
    lng = pos.longitude;
  } catch {}

  initMap(lat, lng);
  await saveMyLocation(lat, lng);
  await showOtherUsers();

  reloadTimer = setInterval(showOtherUsers, 2000); // ←2秒更新
}

window.addEventListener("DOMContentLoaded", main);