<?php
include 'config.php';

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

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $debug = ["Received POST request"];

    if (isset($_FILES['image'])) {
        $image = $_FILES['image'];
        $debug[] = "Image received: " . $image['name'];
    } else {
        $debug[] = "No image file received";
        echo json_encode(['error' => 'No image file received', 'debug' => $debug]);
        exit;
    }

    $output_height = $_POST['output_height'] ?? '';
    $model = $_POST['model'] ?? '';
    $face_enhancement = isset($_POST['face_enhancement']) && $_POST['face_enhancement'] === 'on' ? true : false;

    $debug[] = "Output Height: $output_height";
    $debug[] = "Model: $model";
    $debug[] = "Face Enhancement: " . ($face_enhancement ? 'true' : 'false');

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, 'https://api.topazlabs.com/image/v1/enhance/async');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Accept: application/json',
        'X-API-Key: ' . API_TOKEN
    ]);

    $postFields = [
        'image' => new CURLFile($image['tmp_name'], $image['type'], $image['name']),
        'output_height' => $output_height,
        'output_format' => 'jpeg',
        'crop_to_fill' => 'false',
        'face_enhancement' => $face_enhancement ? 'true' : 'false'
    ];

    if ($model !== 'Auto') {
        $postFields['model'] = $model;
    }

    curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);

    $debug[] = "Sending request to API";
    $debug[] = "Post Fields: " . json_encode($postFields);
    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $debug[] = "API Response Code: $httpCode";

    if ($response === false) {
        $debug[] = "cURL Error: " . curl_error($ch);
        echo json_encode(['error' => 'cURL error', 'debug' => $debug]);
    } else {
        $debug[] = "API Response: $response";
        $result = json_decode($response, true);
        if (json_last_error() === JSON_ERROR_NONE) {
            $result['debug'] = $debug;
            echo json_encode($result);
        } else {
            echo json_encode(['error' => 'Invalid JSON response', 'raw_response' => $response, 'debug' => $debug]);
        }
    }

    curl_close($ch);
} else {
    echo json_encode(['error' => 'Invalid request method', 'debug' => ['Received non-POST request']]);
}