// ===============================
// 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);

// ===============================
let deviceId = localStorage.getItem("deviceId");
if (!deviceId) {
  deviceId = crypto.randomUUID();
  localStorage.setItem("deviceId", deviceId);
}

let currentGroup = "";
let currentUser = "";
let map;
let userMarker;
let otherMarkers = [];
let latestByDevice = {};

let lastLat = null;
let lastLng = null;

const DEFAULT_LAT = 35.685175;
const DEFAULT_LNG = 139.752799;

// ===============================
function loadParams() {
  const params = new URLSearchParams(location.search);
  currentGroup = params.get("group") || "";
  currentUser = params.get("user") || "";

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

// ===============================
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],
});

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],
});

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

// ===============================
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);
}

// ===============================
async function saveMyLocation(lat, lng) {
  try {
    await supa
      .from("locations")
      .delete()
      .eq("group_name", currentGroup)
      .eq("device_id", deviceId);

    await supa.from("locations").insert({
      group_name: currentGroup,
      user_name: currentUser,
      device_id: deviceId,
      lat,
      lng,
    });
  } catch (e) {
    console.warn("位置保存失敗:", e);
  }
}

// ===============================
function showMemberList(latestByDevice) {
  const list = document.getElementById("memberList");
  list.innerHTML = "";

  Object.values(latestByDevice).forEach((row) => {
    const li = document.createElement("li");

    // ★ オンライン判定：30秒以内
    const updated = new Date(row.updated_at);
    const now = new Date();
    const diff = (now - updated) / 1000;
    li.classList.add(diff < 30 ? "online" : "offline");

    const icon = document.createElement("div");
    icon.className = "member-icon";
    li.appendChild(icon);

    li.append(row.user_name);

    li.addEventListener("click", () => {
      if (row.lat && row.lng) {
        map.setView([row.lat, row.lng], 16, { animate: true });

        const marker = otherMarkers.find(m => m._myDeviceId === row.device_id);
        if (marker && marker._icon) {
          marker._icon.classList.add("bounce-pin");
          setTimeout(() => marker._icon.classList.remove("bounce-pin"), 600);
        }
      }
    });

    list.appendChild(li);
  });
}

// ===============================
async function showOtherUsers() {
  const { data, error } = await supa
    .from("locations")
    .select("*")
    .eq("group_name", currentGroup)
    .order("updated_at", { ascending: false });

  if (error || !Array.isArray(data)) return;

  latestByDevice = {};
  for (const row of data) {
    if (!latestByDevice[row.device_id]) {
      latestByDevice[row.device_id] = row;
    }
  }

  // 自分が抜け落ちるのを防ぐ
  if (!latestByDevice[deviceId]) {
    latestByDevice[deviceId] = {
      user_name: currentUser,
      device_id: deviceId,
      lat: lastLat,
      lng: lastLng,
      updated_at: new Date().toISOString()
    };
  }

  showMemberList(latestByDevice);

  otherMarkers.forEach((m) => map.removeLayer(m));
  otherMarkers = [];

  Object.values(latestByDevice).forEach((row) => {
    if (row.device_id === deviceId) return;
    if (row.lat == null || row.lng == null) return;

    const mk = L.marker([row.lat, row.lng], { icon: otherIcon }).addTo(map);
    mk._myDeviceId = row.device_id;
    otherMarkers.push(mk);
  });
}

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

  let lat = DEFAULT_LAT;
  let lng = DEFAULT_LNG;

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

  lastLat = lat;
  lastLng = lng;

  initMap(lat, lng);

  await saveMyLocation(lastLat, lastLng);
  await showOtherUsers();

  // ★ 位置更新を 10秒ごとに（安定性向上）
  setInterval(async () => {
    try {
      const pos = await getPosition();
      lastLat = pos.latitude;
      lastLng = pos.longitude;
      await saveMyLocation(lastLat, lastLng);
    } catch {}
  }, 10000);

  // 他ユーザー 2秒ごと更新
  setInterval(showOtherUsers, 2000);

  const exitBtn = document.getElementById("exitBtn");
  if (exitBtn) exitBtn.onclick = () => location.href = "index.html";
}

window.addEventListener("DOMContentLoaded", main);