<?php
/**
 * Settings helper functions.
 *
 * @package 100Prints
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Default plugin settings.
 *
 * @return array
 */
function hundred_prints_default_settings() {
	return [
		'default_quality'      => 'high',
		'default_format'       => 'pdf',
		'default_side'         => 'both',
		'cache_ttl_hours'      => 24,
		'log_enabled'          => true,
		'log_retention_days'   => 30,
		'preload_sdk_globally' => false,
		'debug_mode'           => false,
		'filename_pattern'     => '{template_name}_{date}',
		'api_url_override'     => '',
	];
}

/**
 * Get merged plugin settings.
 *
 * @return array
 */
function hundred_prints_get_settings() {
	$settings = get_option( '100p_settings', [] );
	if ( ! is_array( $settings ) ) {
		$settings = [];
	}

	return array_merge( hundred_prints_default_settings(), $settings );
}

/**
 * Sanitize settings submitted through the Settings API.
 *
 * @param array $input Raw settings input.
 * @return array
 */
function hundred_prints_sanitize_settings( $input ) {
	$input = is_array( $input ) ? $input : [];

	$defaults = hundred_prints_default_settings();
	$sanitized = $defaults;

	$allowed_quality = [ 'draft', 'standard', 'high', 'ultra' ];
	$quality = isset( $input['default_quality'] ) ? sanitize_key( $input['default_quality'] ) : $defaults['default_quality'];
	$sanitized['default_quality'] = in_array( $quality, $allowed_quality, true ) ? $quality : $defaults['default_quality'];

	$allowed_format = [ 'pdf', 'png' ];
	$format = isset( $input['default_format'] ) ? sanitize_key( $input['default_format'] ) : $defaults['default_format'];
	$sanitized['default_format'] = in_array( $format, $allowed_format, true ) ? $format : $defaults['default_format'];

	$allowed_side = [ 'front', 'back', 'both' ];
	$side = isset( $input['default_side'] ) ? sanitize_key( $input['default_side'] ) : $defaults['default_side'];
	$sanitized['default_side'] = in_array( $side, $allowed_side, true ) ? $side : $defaults['default_side'];

	$sanitized['cache_ttl_hours'] = isset( $input['cache_ttl_hours'] ) ? min( 168, max( 1, absint( $input['cache_ttl_hours'] ) ) ) : $defaults['cache_ttl_hours'];
	$sanitized['log_retention_days'] = isset( $input['log_retention_days'] ) ? min( 365, max( 1, absint( $input['log_retention_days'] ) ) ) : $defaults['log_retention_days'];
	$sanitized['log_enabled'] = ! empty( $input['log_enabled'] );
	$sanitized['preload_sdk_globally'] = ! empty( $input['preload_sdk_globally'] );
	$sanitized['debug_mode'] = ! empty( $input['debug_mode'] );

	$filename_pattern = isset( $input['filename_pattern'] ) ? sanitize_text_field( wp_unslash( $input['filename_pattern'] ) ) : $defaults['filename_pattern'];
	$sanitized['filename_pattern'] = $filename_pattern !== '' ? $filename_pattern : $defaults['filename_pattern'];

	$api_url = isset( $input['api_url_override'] ) ? trim( sanitize_text_field( wp_unslash( $input['api_url_override'] ) ) ) : '';
	$sanitized['api_url_override'] = $api_url !== '' ? esc_url_raw( $api_url ) : '';

	return $sanitized;
}

/**
 * Format frontend-safe settings for JavaScript.
 *
 * @return array
 */
function hundred_prints_get_public_settings() {
	$settings = hundred_prints_get_settings();

	return [
		'defaultQuality'      => $settings['default_quality'],
		'defaultFormat'       => $settings['default_format'],
		'defaultSide'         => $settings['default_side'],
		'filenamePattern'     => $settings['filename_pattern'],
		'preloadSdkGlobally'  => (bool) $settings['preload_sdk_globally'],
		'debugMode'           => (bool) $settings['debug_mode'],
		'logEnabled'          => (bool) $settings['log_enabled'],
	];
}

/**
 * Replace filename tokens with available context values.
 *
 * @param string $pattern Filename pattern.
 * @param array  $tokens  Token values without braces.
 * @return string
 */
function hundred_prints_format_filename( $pattern, $tokens ) {
	$pattern = $pattern !== '' ? $pattern : hundred_prints_get_settings()['filename_pattern'];
	$tokens = is_array( $tokens ) ? $tokens : [];

	$tokens = array_merge(
		[
			'date' => wp_date( 'Y-m-d' ),
			'time' => wp_date( 'His' ),
			'site_name' => get_bloginfo( 'name' ),
		],
		$tokens
	);

	foreach ( $tokens as $key => $value ) {
		$pattern = str_replace( '{' . $key . '}', sanitize_text_field( (string) $value ), $pattern );
	}

	$filename = preg_replace( '/[\\\\\/:*?"<>|]+/', '-', $pattern );
	$filename = trim( preg_replace( '/\s+/', ' ', $filename ) );

	return $filename !== '' ? $filename : 'document';
}