/* ============================================================
   routes/himmelstor.route.js
   GET /himmelstor/daily   – Tagesherausforderung Spielfeld
   GET /himmelstor/weekly  – Wochenherausforderung Spielfeld
============================================================ */

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

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

/* HP-Formel: 20 + (level-1)*2 */
function calcAvatarHp(level) {
  return 20 + (Math.max(1, Math.min(50, level || 1)) - 1) * 2;
}

async function getPlayerHp(userId) {
  try {
    const [[acc]] = await db.query("SELECT level FROM accounts WHERE id = ?", [userId]);
    return calcAvatarHp(acc?.level ?? 1);
  } catch {
    return 20;
  }
}

/* ── GET /himmelstor/daily ─────────────────────────────── */
router.get("/daily", requireLogin, async (req, res) => {
  const userId = req.session.user.id;
  const { match: matchId, slot } = req.query;

  if (!matchId) {
    return res.render("1v1-battlefield", {
      title:       "☀️ Daily Herausforderung",
      matchId:     null,
      mySlot:      "player1",
      player1:     req.session?.user?.ingame_name || "Spieler 1",
      player2:     "Gegner",
      player1hp:   20,
      player1mana: 3,
      player2hp:   20,
      player2mana: 3,
    });
  }

  try {
    const [[me]] = await db.query("SELECT ingame_name FROM accounts WHERE id = ?", [userId]);
    const hp     = await getPlayerHp(userId);
    const isP1   = slot === "player1";

    res.render("1v1-battlefield", {
      title:       "☀️ Daily Herausforderung",
      matchId,
      mySlot:      slot || "player1",
      player1:     isP1 ? (me?.ingame_name || "Du") : "Gegner",
      player2:     isP1 ? "Gegner" : (me?.ingame_name || "Du"),
      player1hp:   isP1 ? hp : 20,
      player1mana: 3,
      player2hp:   isP1 ? 20 : hp,
      player2mana: 3,
    });
  } catch (err) {
    console.error("[Himmelstor /daily]", err);
    res.status(500).send("Fehler beim Laden des Spielfelds.");
  }
});

/* ── GET /himmelstor/weekly ────────────────────────────── */
router.get("/weekly", requireLogin, async (req, res) => {
  const userId = req.session.user.id;
  const { match: matchId, slot } = req.query;

  if (!matchId) {
    return res.render("1v1-battlefield", {
      title:       "🌙 Weekly Herausforderung",
      matchId:     null,
      mySlot:      "player1",
      player1:     req.session?.user?.ingame_name || "Spieler 1",
      player2:     "Gegner",
      player1hp:   20,
      player1mana: 3,
      player2hp:   20,
      player2mana: 3,
    });
  }

  try {
    const [[me]] = await db.query("SELECT ingame_name FROM accounts WHERE id = ?", [userId]);
    const hp     = await getPlayerHp(userId);
    const isP1   = slot === "player1";

    res.render("1v1-battlefield", {
      title:       "🌙 Weekly Herausforderung",
      matchId,
      mySlot:      slot || "player1",
      player1:     isP1 ? (me?.ingame_name || "Du") : "Gegner",
      player2:     isP1 ? "Gegner" : (me?.ingame_name || "Du"),
      player1hp:   isP1 ? hp : 20,
      player1mana: 3,
      player2hp:   isP1 ? 20 : hp,
      player2mana: 3,
    });
  } catch (err) {
    console.error("[Himmelstor /weekly]", err);
    res.status(500).send("Fehler beim Laden des Spielfelds.");
  }
});

module.exports = router;