<?php

namespace WPFormsEntryAutomation\Export;

use WPFormsEntryAutomation\Export\Formatter\CSV;
use WPFormsEntryAutomation\Export\Formatter\Formatter;
use WPFormsEntryAutomation\Export\Formatter\JSON;
use WPFormsEntryAutomation\Export\Formatter\PDF;
use WPFormsEntryAutomation\Export\Formatter\XLSX;
use WPFormsEntryAutomation\Plugin;

/**
 * Class FormatterManager.
 *
 * @since 1.0.0
 */
class FormatterManager {

	/**
	 * Available format types.
	 *
	 * @since 1.0.0
	 *
	 * @var array
	 */
	private $formats;

	/**
	 * Temporary directory path.
	 *
	 * @since 1.0.0
	 *
	 * @var string
	 */
	private $temp_dir = '';

	/**
	 * Constructor.
	 *
	 * @since 1.0.0
	 */
	public function __construct() {

		$this->formats = [
			'csv'  => new CSV( $this ),
			'xlsx' => new XLSX( $this ),
			'json' => new JSON( $this ),
			'pdf'  => new PDF( $this ),
		];
	}

	/**
	 * Get available format types.
	 *
	 * @since 1.0.0
	 *
	 * @return array
	 */
	public function get_formats(): array {

		/**
		 * Filter the available format types.
		 *
		 * @since 1.0.0
		 *
		 * @param array $formats Format types.
		 */
		return (array) apply_filters( 'wpforms_entry_automation_export_formatter_manager_get_formats', $this->formats );
	}

	/**
	 * Get available format labels.
	 *
	 * @since 1.0.0
	 *
	 * @return array Array of format keys and their display labels.
	 */
	public function get_formats_labels(): array {

		$labels = [];

		foreach ( $this->get_formats() as $key => $formatter ) {
			$labels[ $key ] = $formatter->get_title();
		}

		return $labels;
	}

	/**
	 * Get a specific formatter instance.
	 *
	 * @since 1.0.0
	 *
	 * @param string $format Format type.
	 *
	 * @return Formatter|null Formatter instance or null if not found.
	 */
	public function get_formatter( string $format ): ?Formatter {

		$formats = $this->get_formats();

		return $formats[ $format ] ?? null;
	}

	/**
	 * Format entries.
	 *
	 * @since 1.0.0
	 *
	 * @param array  $task_data          Task data.
	 * @param array  $entries            Entries data.
	 * @param array  $form_data          Form data.
	 * @param string $existing_file_path Existing file path for appending, if any.
	 *
	 * @return string File path or empty string on failure.
	 */
	public function format_entries( array $task_data, array $entries, array $form_data, string $existing_file_path = '' ): string {

		$connection = $form_data['settings'][ Plugin::SLUG ][ $task_data['connection_id'] ?? '' ] ?? [];
		$format     = $connection['format'] ?? '';
		$formatter  = $this->get_formatter( $format );

		if ( ! $formatter ) {
			return '';
		}

		return $formatter->format(
			$entries,
			$task_data,
			$form_data,
			$connection,
			$existing_file_path
		);
	}

	/**
	 * Tmp files directory.
	 *
	 * @since 1.0.0
	 *
	 * @return string Temporary files directory path.
	 */
	private function get_base_temp_dir(): string {

		$upload_dir  = wpforms_upload_dir();
		$upload_path = $upload_dir['path'];

		$export_path = trailingslashit( $upload_path ) . 'export';

		if ( ! file_exists( $export_path ) ) {
			wp_mkdir_p( $export_path );
		}

		// Check if the .htaccess exists in the upload directory, if not - create it.
		wpforms_create_upload_dir_htaccess_file();

		// Check if the index.html exists in the directories, if not - create it.
		wpforms_create_index_html_file( $upload_path );
		wpforms_create_index_html_file( $export_path );

		// Normalize slashes for Windows.
		return wp_normalize_path( $export_path );
	}

	/**
	 * Set the temporary directory path.
	 *
	 * @since 1.0.0
	 *
	 * @param string $temp_dir Path to the temporary directory.
	 */
	public function set_temp_dir( string $temp_dir ): void {

		$this->temp_dir = $temp_dir;
	}

	/**
	 * Retrieve the temporary directory.
	 *
	 * @since 1.0.0
	 *
	 * @return string Path to the temporary directory.
	 */
	public function get_temp_dir(): string {

		if ( ! $this->temp_dir ) {
			$this->set_temp_dir( $this->get_base_temp_dir() );
		}

		return $this->temp_dir;
	}
}