<?php
require_once __DIR__ . '/../helpers.php';
runAuth();

/**
 * Download Business Images
 *
 * Downloads logo and header images from external URLs.
 *
 * POST JSON:
 * {
 *   "businessID": 123,
 *   "logoUrl": "https://example.com/logo.png",
 *   "headerUrl": "https://example.com/header.jpg"
 * }
 */

$response = ['OK' => false, 'downloaded' => []];

try {
    $data = readJsonBody();

    $businessID = (int)($data['businessID'] ?? 0);
    if ($businessID === 0) {
        throw new Exception('businessID is required');
    }

    $uploadsPath = uploadsRoot();

    $logosPath = "$uploadsPath/logos";
    $headersPath = "$uploadsPath/headers";

    if (!is_dir($logosPath)) mkdir($logosPath, 0755, true);
    if (!is_dir($headersPath)) mkdir($headersPath, 0755, true);

    // Download logo
    if (!empty($data['logoUrl'])) {
        $logoUrl = $data['logoUrl'];
        $ext = '.png';
        if (stripos($logoUrl, '.jpg') !== false || stripos($logoUrl, '.jpeg') !== false) $ext = '.jpg';
        elseif (stripos($logoUrl, '.gif') !== false) $ext = '.gif';
        elseif (stripos($logoUrl, '.webp') !== false) $ext = '.webp';

        $logoFile = "$logosPath/$businessID$ext";

        try {
            $ch = curl_init($logoUrl);
            curl_setopt_array($ch, [
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_TIMEOUT => 30,
                CURLOPT_FOLLOWLOCATION => true,
            ]);
            $content = curl_exec($ch);
            $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            curl_close($ch);

            if ($httpCode === 200 && $content !== false) {
                file_put_contents($logoFile, $content);
                $response['downloaded'][] = [
                    'type' => 'logo',
                    'url' => $logoUrl,
                    'savedTo' => "/uploads/logos/$businessID$ext",
                    'size' => strlen($content),
                ];
            } else {
                $response['downloaded'][] = [
                    'type' => 'logo',
                    'url' => $logoUrl,
                    'error' => "HTTP $httpCode",
                ];
            }
        } catch (Exception $e) {
            $response['downloaded'][] = [
                'type' => 'logo',
                'url' => $logoUrl,
                'error' => $e->getMessage(),
            ];
        }
    }

    // Download header
    if (!empty($data['headerUrl'])) {
        $headerUrl = $data['headerUrl'];

        try {
            $ch = curl_init($headerUrl);
            curl_setopt_array($ch, [
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_TIMEOUT => 30,
                CURLOPT_FOLLOWLOCATION => true,
                CURLOPT_HTTPHEADER => [
                    'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',
                ],
            ]);
            $content = curl_exec($ch);
            $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            $contentType = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
            curl_close($ch);

            if ($httpCode === 200 && $content !== false && strlen($content) > 100) {
                // Detect actual format from content-type or magic bytes
                $ext = 'jpg';
                if (stripos($contentType, 'png') !== false) $ext = 'png';
                elseif (stripos($contentType, 'gif') !== false) $ext = 'gif';
                elseif (stripos($contentType, 'webp') !== false) $ext = 'webp';
                else {
                    // Fallback: check magic bytes
                    $hex = strtoupper(bin2hex(substr($content, 0, 8)));
                    if (str_starts_with($hex, '89504E47')) $ext = 'png';
                    elseif (str_starts_with($hex, '474946')) $ext = 'gif';
                    elseif (str_starts_with($hex, '52494646')) $ext = 'webp';
                }

                $headerFile = "$headersPath/$businessID.$ext";
                file_put_contents($headerFile, $content);

                // Update database
                queryTimed("UPDATE Businesses SET HeaderImageExtension = ? WHERE ID = ?", [$ext, $businessID]);

                $response['downloaded'][] = [
                    'type' => 'header',
                    'url' => $headerUrl,
                    'savedTo' => "/uploads/headers/$businessID.$ext",
                    'size' => strlen($content),
                ];
            } else {
                $response['downloaded'][] = [
                    'type' => 'header',
                    'url' => $headerUrl,
                    'error' => "HTTP $httpCode (size: " . strlen($content ?: '') . ")",
                ];
            }
        } catch (Exception $e) {
            $response['downloaded'][] = [
                'type' => 'header',
                'url' => $headerUrl,
                'error' => $e->getMessage(),
            ];
        }
    }

    $response['OK'] = true;
    $response['businessID'] = $businessID;

} catch (Exception $e) {
    $response['error'] = $e->getMessage();
}

jsonResponse($response);