const express = require("express");
const router = express.Router();
const db = require("../database/database");

/* ========================
   Login Middleware (lokal)
======================== */

function requireLogin(req, res, next) {
  if (!req.session.user) {
    return res.status(401).json({ error: "Nicht eingeloggt" });
  }
  next();
}

/* ================================
   Arena Übersicht
   GET /arena
================================ */

router.get("/", (req, res) => {
  res.render("arena", {
    title: "Kampfarena",
  });
});

/* ========================
   GET /arena/me
   Eigene Spielerdaten für Matchmaking
======================== */

router.get("/me", requireLogin, async (req, res) => {
  const userId = req.session.user.id;
  try {
    const [[account]] = await db.query(
      "SELECT id, ingame_name, level FROM accounts WHERE id = ?",
      [userId],
    );

    if (!account) {
      return res.status(404).json({ error: "Spieler nicht gefunden" });
    }

    res.json({
      id: account.id,
      name: account.ingame_name || "Unbekannter Held",
      level: account.level || 1,
    });
  } catch (err) {
    console.error("[Arena /me]", err);
    res.status(500).json({ error: "Datenbankfehler" });
  }
});

/* ================================
   1v1 Spielfeld
   GET /arena/1v1
================================ */

router.get("/1v1", requireLogin, async (req, res) => {
  const userId = req.session.user.id;
  const { match: matchId, slot } = req.query;

  // Kein matchId → direkte Vorschau ohne Matchmaking (z.B. für Tests)
  if (!matchId) {
    return res.render("1v1-battlefield", {
      title: "1v1 Kampf",
      matchId: null,
      mySlot: "player1",
      player1: req.session?.character?.name || req.session?.user?.ingame_name || "Spieler 1",
      player2: "Gegner",
      player1hp: 20,
      player1mana: 3,
      player2hp: 20,
      player2mana: 3,
    });
  }

  try {
    // Eigene Spielerdaten laden
    const [[me]] = await db.query(
      "SELECT ingame_name, level FROM accounts WHERE id = ?",
      [userId],
    );

    // HP + Mana aus Charakter-Tabelle (falls vorhanden, sonst Defaults)
    let myHp = 20;
    let myMana = 3;

    try {
      const [[charStats]] = await db.query(
        "SELECT hp, mana FROM characters WHERE account_id = ?",
        [userId],
      );
      if (charStats) {
        myHp = charStats.hp || 20;
        myMana = charStats.mana || 3;
      }
    } catch {
      // Tabelle existiert evtl. noch nicht – Defaults verwenden
    }

    const isPlayer1 = slot === "player1";

    res.render("1v1-battlefield", {
      title: "⚔️ 1v1 Kampf",
      matchId,
      mySlot: slot || "player1",
      player1: isPlayer1 ? (me?.ingame_name || "Du") : "Gegner",
      player2: isPlayer1 ? "Gegner" : (me?.ingame_name || "Du"),
      player1hp:   isPlayer1 ? myHp : 20,
      player1mana: isPlayer1 ? myMana : 3,
      player2hp:   isPlayer1 ? 20 : myHp,
      player2mana: isPlayer1 ? 3 : myMana,
    });
  } catch (err) {
    console.error("[Arena /1v1]", err);
    res.status(500).send("Fehler beim Laden des Spielfelds.");
  }
});

/* ================================
   2v2 Spielfeld (Platzhalter)
   GET /arena/2v2
================================ */

router.get("/2v2", (req, res) => {
  res.render("1v1-battlefield", {
    title: "2v2 Kampf",
    matchId: null,
    mySlot: "player1",
    player1: req.session?.character?.name || "Spieler 1",
    player2: "Gegner",
    player1hp: 20,
    player1mana: 3,
    player2hp: 20,
    player2mana: 3,
  });
});

/* ================================
   4v4 Spielfeld (Platzhalter)
   GET /arena/4v4
================================ */

router.get("/4v4", (req, res) => {
  res.render("1v1-battlefield", {
    title: "4v4 Kampf",
    matchId: null,
    mySlot: "player1",
    player1: req.session?.character?.name || "Spieler 1",
    player2: "Gegner",
    player1hp: 20,
    player1mana: 3,
    player2hp: 20,
    player2mana: 3,
  });
});

module.exports = router;