<?php

namespace App\Http\Controllers;

use App\Models\AppFeedback;
use Illuminate\Http\Request;
use Illuminate\Validation\ValidationException;

class AppFeedbackController extends Controller
{
    // USER: get the current user's feedback (null if none yet).
    public function mine()
    {
        $feedback = AppFeedback::where('user_id', auth()->id())->first();

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

    // USER: submit or update feedback (one editable row per user).
    public function store(Request $request)
    {
        $data = $request->validate([
            'stars' => 'nullable|integer|min:1|max:5',
            'content' => 'nullable|string|max:2000',
        ]);

        if (!$request->filled('stars') && !$request->filled('content')) {
            throw ValidationException::withMessages([
                'content' => ['Either a rating or a comment is required.'],
            ]);
        }

        $feedback = AppFeedback::firstOrNew(['user_id' => auth()->id()]);

        if ($request->has('stars')) {
            $feedback->stars = $data['stars'] ?? null;
        }
        if ($request->has('content')) {
            $feedback->content = $data['content'] ?? null;
        }

        $feedback->save();

        return response()->json([
            'message' => 'Feedback submitted successfully',
            'feedback' => $feedback,
        ]);
    }

    // ADMIN: monitor all feedback, with a summary header.
    public function adminIndex(Request $request)
    {
        $query = AppFeedback::with('user');

        if ($request->filled('has_comment')) {
            $query->whereNotNull('content')->where('content', '!=', '');
        }
        if ($request->filled('stars')) {
            $query->where('stars', $request->integer('stars'));
        }

        $feedback = $query->latest()->paginate($request->integer('per_page', 20));

        $base = AppFeedback::query();

        return response()->json([
            'summary' => [
                'total' => (clone $base)->count(),
                'rated' => (clone $base)->whereNotNull('stars')->count(),
                'with_comment' => (clone $base)->whereNotNull('content')->where('content', '!=', '')->count(),
                'average_stars' => round((float) (clone $base)->whereNotNull('stars')->avg('stars'), 2),
            ],
            'feedback' => $feedback,
        ]);
    }

    // ADMIN: remove a feedback entry (moderation).
    public function adminDestroy($id)
    {
        $feedback = AppFeedback::findOrFail($id);
        $feedback->delete();

        return response()->json(['message' => 'Feedback deleted successfully']);
    }
}