<?php

require_once 'ApiClient.php';

/**
 * AssetUploader - Handles file uploads to Ferrero DAM
 */
class AssetUploader
{
    private $apiClient;
    private $targetFolderId;

    public function __construct(ApiClient $apiClient, $targetFolderId = null)
    {
        $this->apiClient = $apiClient;
        $this->targetFolderId = $targetFolderId;
    }

    /**
     * Upload a file to DAM with metadata
     *
     * @param string $filePath Local file path
     * @param string $folderId Target folder ID (campaign folder)
     * @param array $metadata Optional metadata to set
     * @return array Upload result
     */
    public function uploadFile($filePath, $folderId, $metadata = [])
    {
        if (!file_exists($filePath)) {
            return [
                'success' => false,
                'error' => 'File not found: ' . $filePath
            ];
        }

        $filename = basename($filePath);
        $mimeType = mime_content_type($filePath);

        // Build multipart form data
        $boundary = '----WebKitFormBoundary' . uniqid();

        // Build asset representation JSON
        $assetRepresentation = $this->buildAssetRepresentation($filename, $metadata);

        // Build multipart body
        $body = '';

        // Add asset_representation part
        $body .= "--{$boundary}\r\n";
        $body .= "Content-Disposition: form-data; name=\"asset_representation\"\r\n";
        $body .= "Content-Type: application/json\r\n\r\n";
        $body .= json_encode($assetRepresentation) . "\r\n";

        // Add parent_folder_id part
        $body .= "--{$boundary}\r\n";
        $body .= "Content-Disposition: form-data; name=\"parent_folder_id\"\r\n\r\n";
        $body .= $folderId . "\r\n";

        // Add file part
        $body .= "--{$boundary}\r\n";
        $body .= "Content-Disposition: form-data; name=\"file\"; filename=\"{$filename}\"\r\n";
        $body .= "Content-Type: {$mimeType}\r\n\r\n";
        $body .= file_get_contents($filePath) . "\r\n";

        $body .= "--{$boundary}--\r\n";

        // Make upload request
        $request = [
            'method' => 'POST',
            'url' => '/v6/assets',
            'body' => $body
        ];

        // Set multipart content-type header
        $this->apiClient->setHeader('Content-Type', "multipart/form-data; boundary={$boundary}");

        $response = $this->apiClient->executeRequest($request);

        if ($response['success'] && $response['http_code'] == 201) {
            $responseData = json_decode($response['body'], true);

            return [
                'success' => true,
                'asset_id' => $responseData['asset_resource_list']['asset_resource'][0]['asset']['asset_id'] ?? null,
                'filename' => $filename,
                'response' => $responseData
            ];
        }

        return [
            'success' => false,
            'error' => 'Upload failed',
            'http_code' => $response['http_code'],
            'response' => $response['body']
        ];
    }

    /**
     * Build asset representation for upload
     */
    private function buildAssetRepresentation($filename, $metadata = [])
    {
        $assetRep = [
            'asset_resource' => [
                'asset' => [
                    'metadata' => [
                        'metadata_element_list' => []
                    ]
                ]
            ]
        ];

        // Add filename metadata
        $assetRep['asset_resource']['asset']['metadata']['metadata_element_list'][] = [
            'id' => 'ARTESIA.FIELD.ASSET NAME',
            'type' => 'com.artesia.metadata.MetadataField',
            'value' => [
                'cascading_domain_value' => false,
                'domain_value' => false,
                'value' => [
                    'type' => 'string',
                    'value' => $filename
                ]
            ]
        ];

        // Add custom metadata fields
        foreach ($metadata as $fieldId => $fieldValue) {
            $assetRep['asset_resource']['asset']['metadata']['metadata_element_list'][] = [
                'id' => $fieldId,
                'type' => 'com.artesia.metadata.MetadataField',
                'value' => [
                    'cascading_domain_value' => false,
                    'domain_value' => false,
                    'value' => [
                        'type' => 'string',
                        'value' => $fieldValue
                    ]
                ]
            ];
        }

        return $assetRep;
    }

    /**
     * Upload multiple files
     */
    public function uploadMultipleFiles($files, $folderId, $metadata = [])
    {
        $results = [
            'total' => count($files),
            'successful' => 0,
            'failed' => 0,
            'details' => []
        ];

        foreach ($files as $file) {
            $result = $this->uploadFile($file, $folderId, $metadata);

            if ($result['success']) {
                $results['successful']++;
            } else {
                $results['failed']++;
            }

            $results['details'][] = $result;
        }

        return $results;
    }
}