<?php

namespace App\Http\Controllers;

use App\Models\Quest;
use App\Models\Task;
use Illuminate\Http\Request;

class QuestController extends Controller
{
    public function index(Request $request)
    {
        $quests = Quest::where('user_id', $request->user()->id)->where('is_completed', false)->get();
        return response()->json($quests);
    }

    public function generate(Request $request)
    {
        // Vereinfachte Logik: Nimmt die letzten 5 offenen Tasks und macht daraus Quests
        $tasks = Task::where('user_id', $request->user()->id)->limit(5)->get();

        $quests = [];
        foreach ($tasks as $task) {
            $quests[] = Quest::create([
                'user_id' => $request->user()->id,
                'task_id' => $task->id,
                'title' => $task->title,
                'category' => $task->category,
                'due_date' => $task->due_date,
                'xp_reward' => 50,
                'is_completed' => false
            ]);
        }

        return response()->json($quests, 201);
    }

    public function complete(Request $request, $id)
    {
        $quest = Quest::where('user_id', $request->user()->id)->findOrFail($id);

        if ($quest->is_completed) {
            return response()->json(['message' => 'Quest already completed'], 400);
        }

        // Mark as completed
        $quest->update(['is_completed' => true]);

        $user = $request->user();
        $user->xp += $quest->xp_reward;

        // Level-Up Check (vereinfachte Logik)
        $xpForNextLevel = $user->level * 100;
        $levelUp = false;
        while ($user->xp >= $xpForNextLevel) {
            $user->level += 1;
            $user->xp = $user->xp - $xpForNextLevel;
            $xpForNextLevel = $user->level * 100;
            $levelUp = true;
        }
        $user->save();

        return response()->json([
            'quest' => $quest,
            'xp_gained' => $quest->xp_reward,
            'new_level' => $user->level,
            'level_up' => $levelUp
        ]);
    }
}