<?php

namespace App\Http\Controllers;

use App\Helpers\FirstParty\Credits\CreditsService;
use App\Jobs\GenerateMemeJob;
use Illuminate\Http\Request;
use App\Models\Category;
use Auth;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Str;

class UserAIController extends Controller
{
    public function generateMeme(Request $request)
    {
        $user = Auth::user();

        if (!CreditsService::canSpend($user->id, 2)) {
            return response()->json([
                'error' => [
                    'message' => 'You do not have enough credits to generate a meme. Please purchase credits from the Store.',
                ],
            ]);
        }

        CreditsService::spend($user->id, 2);

        $jobId = Str::uuid()->toString();
        
        Cache::put("meme_job_status_{$jobId}", 'pending', 300);
        
        $job = new GenerateMemeJob($user->id, $request->prompt, $jobId);
        dispatch($job);

        return response()->json([
            'success' => [
                'data' => [
                    'job_id' => $jobId,
                    'status' => 'pending',
                ],
            ],
        ]);
    }

    public function checkMemeJobStatus(Request $request)
    {
        $jobId = $request->job_id;
        
        if (!$jobId) {
            return response()->json([
                'error' => [
                    'message' => 'Job ID is required.',
                ],
            ], 400);
        }

        $status = Cache::get("meme_job_status_{$jobId}");
        
        if (!$status) {
            return response()->json([
                'error' => [
                    'message' => 'Job not found or expired.',
                ],
            ], 404);
        }

        $response = [
            'success' => [
                'data' => [
                    'job_id' => $jobId,
                    'status' => $status,
                ],
            ],
        ];

        if ($status === 'completed') {
            $result = Cache::get("meme_job_result_{$jobId}");
            if ($result) {
                $response['success']['data']['result'] = $result;
            }
        } elseif ($status === 'failed') {
            $error = Cache::get("meme_job_error_{$jobId}");
            if ($error) {
                $response['success']['data']['error'] = $error;
            }
        }

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

    public function aiHints()
    {
        $categories = Category::whereNotNull('keywords')
            ->inRandomOrder()
            ->take(8)
            ->get();

        if ($categories->isEmpty()) {
            return response()->json([
                'success' => [
                    'data' => [
                        'keywords' => []
                    ]
                ]
            ]);
        }

        $keywords = $categories->map(function ($category) {
            return collect($category->keywords)->random();
        })->toArray();

        return response()->json([
            'success' => [
                'data' => [
                    'keywords' => $keywords
                ]
            ]
        ]);
    }
}