<?php

namespace DJMixHosting;

class Upload
{
    protected $file;
    protected $config;
    protected $errors = [];
    protected $uploadDir;
    protected $uuid;
    protected $fileExt;
    protected $localPath;

    public function __construct(array $file, array $config)
    {
        $this->file = $file;
        $this->config = $config;
        $this->uploadDir = rtrim($config['uploads']['tmp_path'], '/') . '/';
        $this->uuid = uniqid();
        $this->fileExt = strtolower(pathinfo($file['name'], PATHINFO_EXTENSION));
    }

    public function validate(): bool
    {
        if ($this->file['error'] !== UPLOAD_ERR_OK) {
            $this->errors[] = "File upload error.";
        }
        if ($this->file['size'] > $this->config['uploads']['max_file_size']) {
            $this->errors[] = "File is too large.";
        }
        if (!in_array($this->fileExt, $this->config['uploads']['allowed_file_types'])) {
            $this->errors[] = "File type not allowed.";
        }
        if (!in_array($this->file['type'], $this->config['uploads']['allowed_mime_type'])) {
            $this->errors[] = "MIME type not allowed.";
        }
        return empty($this->errors);
    }

    public function getErrors(): array
    {
        return $this->errors;
    }

    public function moveFile(): bool
    {
        $destination = $this->uploadDir . $this->uuid . "." . $this->fileExt;
        if (move_uploaded_file($this->file['tmp_name'], $destination)) {
            $this->localPath = $destination;
            return true;
        }
        $this->errors[] = "Failed to move uploaded file.";
        return false;
    }

    public function process(): array
    {
        // Assuming moveFile() has been called
        $uploadTask = [
            'original_name' => $this->file['name'],
            'local_path'    => $this->localPath,
            'size'          => $this->file['size'],
            'ext'           => $this->fileExt,
        ];

        if ($this->fileExt === "mp3") {
            $escapedFile = escapeshellarg($this->localPath);
            $artist = trim(shell_exec("eyed3 --query='%a%' $escapedFile"));
            $title = trim(shell_exec("eyed3 --query='%t%' $escapedFile"));
            $duration = trim(shell_exec("mp3info -p \"%S\" $escapedFile"));

            $uploadTask['file_type'] = 'mp3';
            $uploadTask['metadata'] = [
                'artist'   => $artist,
                'title'    => $title,
                'duration' => $duration,
            ];
            $uploadTask['mediaplayer'] = 0;
        } elseif ($this->fileExt === "zip") {
            $zip = new \ZipArchive;
            if ($zip->open($this->localPath) === true) {
                $totalDuration = 0;
                $tracklist = [];
                for ($i = 0; $i < $zip->numFiles; $i++) {
                    $entryName = $zip->getNameIndex($i);
                    $entryExt = strtolower(pathinfo($entryName, PATHINFO_EXTENSION));
                    if ($entryExt === "mp3") {
                        $tempDir = $this->uploadDir . uniqid('zip_');
                        mkdir($tempDir);
                        $tempFilePath = $tempDir . '/' . basename($entryName);
                        $zip->extractTo($tempDir, $entryName);
                        $escapedFile = escapeshellarg($tempFilePath);
                        $title = trim(shell_exec("eyed3 --query='%t%' $escapedFile"));
                        $duration = trim(shell_exec("mp3info -p \"%S\" $escapedFile"));
                        $tracklist[] = $title ?: basename($entryName);
                        $totalDuration += (int)$duration;
                        unlink($tempFilePath);
                        rmdir($tempDir);
                    }
                }
                $zip->close();
                $uploadTask['file_type'] = 'zip';
                $uploadTask['metadata'] = [
                    'tracklist'      => $tracklist,
                    'total_duration' => $totalDuration,
                ];
                $uploadTask['mediaplayer'] = 1;
            } else {
                $this->errors[] = "Failed to open ZIP file.";
            }
        } else {
            $this->errors[] = "Unsupported file type.";
        }

        return $uploadTask;
    }

    public function uploadToCDN(CDN $cdn): string
    {
        // Create a remote path – e.g., under a temp folder with a unique name
        $remotePath = "temp/mixes/" . uniqid() . "_" . basename($this->localPath);
        $mimeType = ($this->fileExt === 'mp3') ? 'audio/mpeg' : 'application/zip';

        $cdn->uploadFile($this->localPath, $remotePath, $mimeType);
        return $remotePath;
    }
}