// ===============================
// 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（ユーザー識別用）
// ===============================
let deviceId = localStorage.getItem("deviceId");
if (!deviceId) {
  deviceId = crypto.randomUUID();
  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（皇居あたり）
const DEFAULT_LAT = 35.685175;
const DEFAULT_LNG = 139.752799;

// ===============================
// URL パラメータから group / 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";

  const gSpan = document.getElementById("groupName");
  const uSpan = document.getElementById("userName");

  if (gSpan) gSpan.textContent = currentGroup;
  if (uSpan) uSpan.textContent = currentUser;
}

// ===============================
// おしゃれなピンアイコン
// ===============================
const myIcon = L.icon({
  iconUrl: "https://raw.githubusercontent.com/pointhi/leaflet-color-markers/master/img/marker-icon-blue.png",
  iconSize: [30, 45],
  iconAnchor: [15, 45],
  popupAnchor: [0, -40]
});

const otherIcon = L.icon({
  iconUrl: "https://raw.githubusercontent.com/pointhi/leaflet-color-markers/master/img/marker-icon-red.png",
  iconSize: [30, 45],
  iconAnchor: [15, 45],
  popupAnchor: [0, -40]
});

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

// ===============================
// 地図の初期化
// ===============================
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) {
  // まず自分の古い記録を削除
  await supa
    .from("locations")
    .delete()
    .eq("group_name", currentGroup)
    .eq("device_id", deviceId);

  // 新しい1件を保存
  await supa.from("locations").insert({
    group_name: currentGroup,
    user_name: currentUser,
    device_id: deviceId,
    lat: lat,
    lng: lng,
  });
}

// ===============================
// グループ内の「各ユーザーの最新ピンのみ」を表示
// ===============================
async function showOtherUsers() {
  const { data, error } = await supa
    .from("locations")
    .select("*")
    .eq("group_name", currentGroup)
    .order("updated_at", { ascending: false });

  if (error || !data) return;

  // 既存のピンを削除（自分以外）
  otherMarkers.forEach((m) => map.removeLayer(m));
  otherMarkers = [];

  // デバイスIDごとに最新1件だけ使う
  const latestByDevice = {};
  for (const row of data) {
    if (!latestByDevice[row.device_id]) {
      latestByDevice[row.device_id] = row;
    }
  }

  // 各ユーザーの最新位置だけピンを表示
  Object.values(latestByDevice).forEach((row) => {
    if (row.device_id === deviceId) return; // 自分はスキップ

    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 (e) {
    console.warn("現在地取得に失敗。デフォルト位置を表示します。");
  }

  initMap(lat, lng);

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

  // ⏱ 2秒ごとに他ユーザーの最新位置を更新
  reloadTimer = setInterval(showOtherUsers, 2000);
}

window.addEventListener("DOMContentLoaded", main);