<?php

namespace App\Http\Controllers;

use App\Models\PackageName;
use App\Models\Reminder;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class ReminderController extends Controller
{
    public function index()
    {
        $reminders = Reminder::where('user_id', Auth::id())
            ->orderBy('time')
            ->get();

        return response()->json($reminders);
    }

    public function store(Request $request)
    {
        $data = $request->validate([
            'title'         => 'required|string|max:255',
            'description'   => 'nullable|string|max:500',
            'time'          => 'required|date',
            'repeatable'    => 'boolean',
            'repeat_days'   => 'nullable|integer|min:1',
            'data'          => 'nullable|array',
        ]);
        $packageNameData = $request->validate([
            'package_name' => 'required|exists:package_names,name',
        ]);

        if (!$packageName = PackageName::with('products')->where('name', $packageNameData['package_name'])->first()) {
            return response()->json([
                'message' => 'package name not found'
            ], 404);
        }

        $reminder = Reminder::create([...$data, 'package_name_id' => $packageName->id, 'user_id' => auth()->user()->id]);

        return $reminder;
    }

    public function show(Reminder $reminder)
    {
        $this->authorizeReminder($reminder);

        return response()->json($reminder);
    }

    public function update(Request $request, Reminder $reminder)
    {
        $this->authorizeReminder($reminder);

        $data = $request->validate([
            'title'         => 'sometimes|string|max:255',
            'description'   => 'nullable|string|max:500',
            'time'          => 'sometimes|date',
            'repeatable'    => 'boolean',
            'repeat_days'   => 'nullable|integer|min:1',
            'data'          => 'nullable|array',
        ]);
        $packageNameData = $request->validate([
            'package_name' => 'required|exists:package_names,name',
        ]);

        if (!$packageName = PackageName::with('products')->where('name', $packageNameData['package_name'])->first()) {
            return response()->json([
                'message' => 'package name not found'
            ], 404);
        }
    
        $reminder->update([...$data, 'package_name_id' => $packageName->id]);

        return response()->json($reminder);
    }

    public function destroy(Reminder $reminder)
    {
        $this->authorizeReminder($reminder);

        $reminder->delete();

        return response()->json(null, 204);
    }

    private function authorizeReminder(Reminder $reminder)
    {
        if ($reminder->user_id !== Auth::id()) {
            abort(403, 'Unauthorized action.');
        }
    }


 public function packageIndex(PackageName $packageName)
    {
        // Get package-wide reminders (user_id = null) for this package
        $reminders = Reminder::where('package_name_id', $packageName->id)
            ->whereNull('user_id')
            ->orderBy('time')
            ->get();
            
        return response()->json($reminders);
    }

public function packageStore(Request $request, PackageName $packageName)
{
    $data = $request->validate([
        'title'         => 'required|string|max:255',
        'description'   => 'nullable|string|max:500',
        'time'          => 'required|date',
        'repeatable'    => 'boolean',
        'repeat_days'   => 'nullable|integer|min:1',
        'data'          => 'nullable|array',
    ]);

    $reminder = Reminder::create([
        ...$data,
        'package_name_id' => $packageName->id,
        'user_id'         => null 
    ]);

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

    public function packageUpdate(Request $request, PackageName $packageName, Reminder $reminder)
    {
        // Basic checks
        if (!auth()->check()) {
            return response()->json(['message' => 'Unauthorized'], 401);
        }
        
        if ($reminder->user_id !== null) {
            return response()->json(['message' => 'This is not a package-wide reminder'], 400);
        }

        if ($reminder->package_name_id !== $packageName->id) {
            return response()->json(['message' => 'This reminder does not belong to this package'], 403);
        }

        $data = $request->validate([
            'title'         => 'sometimes|string|max:255',
            'description'   => 'nullable|string|max:500',
            'time'          => 'sometimes|date',
            'repeatable'    => 'boolean',
            'repeat_days'   => 'nullable|integer|min:1',
            'data'          => 'nullable|array',
        ]);

        // If time is being updated, reset last_repeat to null
        if (isset($data['time']) && $reminder->time != $data['time']) {
            $data['last_repeat'] = null;
        }

        $reminder->update($data);

        return response()->json($reminder);
    }

   public function packageDestroy(PackageName $packageName, Reminder $reminder)
    {
        // Basic checks
        if (!auth()->check()) {
            return response()->json(['message' => 'Unauthorized'], 401);
        }
        
        if ($reminder->user_id !== null) {
            return response()->json(['message' => 'This is not a package-wide reminder'], 400);
        }

        if ($reminder->package_name_id !== $packageName->id) {
            return response()->json(['message' => 'This reminder does not belong to this package'], 403);
        }

        $reminder->delete();

        return response()->json(null, 204);
    }

}