<?php
/**
 * Includes -> Responsive breakpoints CSS -> Generate
 *
 */
if ( ! defined( 'ABSPATH' ) ) exit;


/**
 * Apply stored mobile/tablet breakpoint widths to compiled CSS
 * Uses temporary markers so tablet_px equal to 480 does not collide with mobile widths
 */
function tbkkt_responsive_breakpoints_css_apply_breakpoint_widths_to_css( string $css, int $mobile_px, int $tablet_px ): string {
	$mobile_px = (int) $mobile_px;
	$tablet_px = (int) $tablet_px;
	$mark_m    = '__tbkkt_BP_MOBILE_PX__';
	$mark_t    = '__tbkkt_BP_TABLET_PX__';
	$css       = str_replace( '480px', $mark_m, $css );
	$css       = str_replace( '782px', $mark_t, $css );
	$css       = str_replace( $mark_t, (string) $tablet_px . 'px', $css );
	return str_replace( $mark_m, (string) $mobile_px . 'px', $css );
}


/**
 * Write generated CSS into the uploads directory when custom breakpoint CSS is enabled
 */
function tbkkt_responsive_breakpoints_css_generate( array $breakpoints ): bool {
	if ( empty( $breakpoints['enabled'] ) ) return true;

	$mobile = isset( $breakpoints['mobile_px'] )
		? (int) $breakpoints['mobile_px']
		: tbkkt_responsive_breakpoints_css_get_default_mobile_px();
	$tablet = isset( $breakpoints['tablet_px'] )
		? (int) $breakpoints['tablet_px']
		: tbkkt_responsive_breakpoints_css_get_default_tablet_px();

	$dest_root = tbkkt_responsive_breakpoints_css_get_generated_base_path();
	if ( $dest_root === '' ) :
		return false;
	endif;

	if ( ! wp_mkdir_p( $dest_root ) ) :
		return false;
	endif;

	$pairs   = tbkkt_responsive_breakpoints_css_get_generated_file_pairs();
	$success = true;

	foreach ( $pairs as $pair ) :
		$source_relative = isset( $pair['source'] )
			? (string) $pair['source']
			: '';
		$output_name     = isset( $pair['output_name'] )
			? (string) $pair['output_name']
			: '';
		if ( $source_relative === '' || $output_name === '' ) continue;

		$src_path = TBKKT_PLUGIN_PATH . ltrim( $source_relative, '/' );
		$dst_path = $dest_root . '/' . $output_name;

		if ( ! is_readable( $src_path ) ) :
			$success = false;
			continue;
		endif;

		// Create subdirectory if needed
		$output_dir = dirname( $dst_path );
		if ( ! is_dir( $output_dir ) ) :
			if ( ! wp_mkdir_p( $output_dir ) ) :
				$success = false;
				continue;
			endif;
		endif;

		$css = file_get_contents( $src_path );
		if ( false === $css ) :
			$success = false;
			continue;
		endif;

		$css = tbkkt_responsive_breakpoints_css_apply_breakpoint_widths_to_css( $css, $mobile, $tablet );

		if ( false === file_put_contents( $dst_path, $css, LOCK_EX ) ) :
			$success = false;
		endif;
	endforeach;

	if ( $success ) :
		tbkkt_responsive_breakpoints_css_write_uploads_index_if_missing();
	endif;

	return $success;
}


/**
 * Run generation from the full plugin option array
 */
function tbkkt_responsive_breakpoints_css_generate_from_option( array $option_value ): void {
	$key      = tbkkt_responsive_breakpoints_css_get_option_key();
	$defaults = tbkkt_responsive_breakpoints_css_get_settings_defaults();
	$branch   = isset( $option_value[ $key ] ) && is_array( $option_value[ $key ] )
		? $option_value[ $key ]
		: $defaults;

	$breakpoints = array(
		'enabled'   => ! empty( $branch['enabled'] ),
		'mobile_px' => isset( $branch['mobile_px'] ) ? (int) $branch['mobile_px'] : (int) $defaults['mobile_px'],
		'tablet_px' => isset( $branch['tablet_px'] ) ? (int) $branch['tablet_px'] : (int) $defaults['tablet_px'],
	);
	if ( ! $breakpoints['enabled'] ) :
		tbkkt_responsive_breakpoints_css_delete_generated_uploads();
		return;
	endif;

	$generated             = tbkkt_responsive_breakpoints_css_generate( $breakpoints );
	$from_settings_tab     = tbkkt_settings_get_submit_tab_from_request() === 'settings';

	if ( ! $generated ) :
		if ( $from_settings_tab ) :
			/* translators: Settings API notice when regenerating breakpoint CSS files failed. */
			add_settings_error(
				TBKKT_SETTINGS_GROUP,
				'tbkkt_rbcss_regen_fail',
				__( 'Could not write responsive CSS files under uploads. Check file permissions and the server error log.', 'tms-block-kit' ),
				'error'
			);
		endif;
		return;
	endif;

	if ( $from_settings_tab ) :
		/* translators: Settings API notice after breakpoint CSS was rebuilt under uploads. */
		add_settings_error(
			TBKKT_SETTINGS_GROUP,
			'tbkkt_rbcss_regen_ok',
			__( 'Responsive CSS files were regenerated from bundled plugin styles.', 'tms-block-kit' ),
			'success'
		);
	endif;
}


/**
 * Keep generated CSS in sync when the plugin option is created (`added_option`) or updated (`updated_option`)
 */
add_action( 'updated_option', function ( string $option, $old_value, $value ): void {
	if ( $option !== TBKKT_OPTION_NAME || ! is_array( $value ) ) return;
	tbkkt_responsive_breakpoints_css_generate_from_option( $value );
}, 10, 3 );

add_action( 'added_option', function ( string $option, $value ): void {
	if ( $option !== TBKKT_OPTION_NAME || ! is_array( $value ) ) return;
	tbkkt_responsive_breakpoints_css_generate_from_option( $value );
}, 10, 2 );