<?php
header('Content-Type: application/json');

require_once __DIR__ . '/../ai/LocalAIApi.php';
require_once __DIR__ . '/../includes/pexels.php';

$action = $_POST['action'] ?? 'chat';

if ($action === 'chat') {
    $day = $_POST['day'] ?? 'good';
    $profession = $_POST['profession'] ?? 'programmer';

    // 1. Generate content with AI using a JSON-structured prompt
    $prompt = <<<PROMPT
A user had a "{$day}" day at their job as a "{$profession}".
Please generate a response in JSON format with two keys:
1. "wish": A short, funny, and cheerful weekend wish for them.
2. "meme_keyword": A single, simple, SFW (safe for work) keyword for a funny meme image related to their situation.

Example:
{
  "wish": "Your code fought bravely, now let your weekend be bug-free! Enjoy the break!",
  "meme_keyword": "relaxing cat"
}
PROMPT;

    $aiResponse = LocalAIApi::createResponse([
        'input' => [
            ['role' => 'system', 'content' => 'You are a cheerful and witty assistant who provides funny weekend wishes and suggests meme keywords in a structured JSON format.'],
            ['role' => 'user', 'content' => $prompt],
        ],
    ]);

    $generatedText = "I'm a bit tired, but I wish you a fantastic weekend! Let's talk more on Monday.";
    $memeKeyword = 'cat'; // Default keyword

    if (!empty($aiResponse['success'])) {
        $jsonOutput = LocalAIApi::decodeJsonFromResponse($aiResponse);
        if ($jsonOutput && isset($jsonOutput['wish']) && isset($jsonOutput['meme_keyword'])) {
            $generatedText = $jsonOutput['wish'];
            $memeKeyword = $jsonOutput['meme_keyword'];
        } else {
             $generatedText = LocalAIApi::extractText($aiResponse); // Fallback to raw text
        }
    }

    // 2. Fetch a meme image using the keyword
    $memeData = null;
    $pexelsUrl = 'https://api.pexels.com/v1/search?query=' . urlencode($memeKeyword) . '&orientation=portrait&per_page=1&page=1';
    $pexelsData = pexels_get($pexelsUrl);

    if ($pexelsData && !empty($pexelsData['photos'])) {
        $photo = $pexelsData['photos'][0];
        $src = $photo['src']['large'] ?? $photo['src']['original'];
        $memeData = [
            'src' => $src,
            'photographer' => $photo['photographer']
        ];
    } else {
        // Fallback image
        $memeData = [
            'src' => 'https://images.pexels.com/photos/1741205/pexels-photo-1741205.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940',
            'photographer' => 'Pexels'
        ];
    }

    echo json_encode([
        'success' => true,
        'message' => $generatedText,
        'meme' => $memeData
    ]);
    exit;
}

echo json_encode(['success' => false, 'error' => 'Invalid action.']);