const { Telegraf } = require("telegraf");
const express = require("express");
const fs = require("fs");
const path = require("path");

const BOT_TOKEN = "7542813790:AAH7eocL5icQvVe8tRsDEqEUPGjgaAoqvQM";
const bot = new Telegraf(BOT_TOKEN);
const app = express();
const PORT = 7860;

// === Load DB (per-group settings and logs) ===
let db = {
  groups: {} // { [groupId]: { settings, logs } }
};

const saveDb = () => fs.writeFileSync("db.json", JSON.stringify(db, null, 2));
try {
  db = JSON.parse(fs.readFileSync("db.json"));
} catch { saveDb(); }

const initGroup = (groupId) => {
  if (!db.groups[groupId]) {
    db.groups[groupId] = {
      settings: { antilink: true },
      logs: []
    };
    saveDb();
  }
};

const log = (groupId, msg) => {
  initGroup(groupId);
  db.groups[groupId].logs.unshift({ msg, time: new Date().toISOString() });
  db.groups[groupId].logs = db.groups[groupId].logs.slice(0, 50);
  saveDb();
};

// === BOT COMMAND: SEND DASHBOARD BUTTON ===
bot.command("menu", (ctx) => {
  if (ctx.chat.type !== "supergroup" && ctx.chat.type !== "group") return;
  initGroup(ctx.chat.id);

  ctx.reply("🔧 Open the admin dashboard:", {
    reply_markup: {
      inline_keyboard: [[
        {
          text: "⚙️ Open Dashboard",
          web_app: { url: `https://yourdomain.com/dashboard?group=${ctx.chat.id}` }
        }
      ]]
    }
  });
});

// === WELCOME + LINK FILTER ===
bot.on("new_chat_members", (ctx) => {
  const groupId = ctx.chat.id;
  initGroup(groupId);

  const name = ctx.message.new_chat_members[0].first_name;
  ctx.reply(`👋 Welcome, ${name}`);
  log(groupId, `User joined: ${name}`);
});

bot.on("message", (ctx) => {
  const groupId = ctx.chat.id;
  if (ctx.chat.type !== "supergroup" && ctx.chat.type !== "group") return;

  initGroup(groupId);

  const msg = ctx.message.text || "";
  if (db.groups[groupId].settings.antilink && msg.match(/https?:\/\/|t\.me/gi)) {
    ctx.deleteMessage();
    ctx.reply("🚫 Links are not allowed!");
    log(groupId, `Deleted link from ${ctx.from.username || ctx.from.id}`);
  }
});

// === EXPRESS CONFIG ===
app.use(express.static("public"));
app.use(express.json());

// === API: GET SETTINGS FOR GROUP ===
app.get("/api/settings", (req, res) => {
  const groupId = req.query.group;
  if (!groupId || !db.groups[groupId]) return res.status(404).json({ error: "Group not found" });
  res.json(db.groups[groupId].settings);
});

// === API: TOGGLE ANTI-LINK FOR GROUP ===
app.post("/api/settings/antilink", (req, res) => {
  const { group, enabled } = req.body;
  if (!group || !db.groups[group]) return res.status(404).json({ error: "Group not found" });

  db.groups[group].settings.antilink = !!enabled;
  saveDb();
  res.json({ success: true });
});

// === API: GET LOGS FOR GROUP ===
app.get("/api/logs", (req, res) => {
  const groupId = req.query.group;
  if (!groupId || !db.groups[groupId]) return res.status(404).json({ error: "Group not found" });
  res.json(db.groups[groupId].logs);
});

// === API: CHECK IF USER IS ADMIN IN GROUP ===
app.post("/api/check-admin", async (req, res) => {
  const { telegram_id, group } = req.body;
  if (!group) return res.status(400).json({ error: "Missing group ID" });

  try {
    const admins = await bot.telegram.getChatAdministrators(group);
    const isAdmin = admins.some(a => a.user.id === telegram_id);
    res.json({ admin: isAdmin });
  } catch (err) {
    console.error("Admin check failed:", err);
    res.status(500).json({ error: "Failed to check admin" });
  }
});

// === FALLBACK ROUTE ===
app.get("/dashboard", (req, res) => {
  res.sendFile(path.join(__dirname, "public", "dashboard.html"));
});

// === START ===
bot.launch().then(() => console.log("🤖 Bot started"));
app.listen(PORT, () => console.log(`🌐 Web server running on http://localhost:${PORT}`));