<?php
/**
 * Plugin Name: ChronoPress Countdown Block
 * Plugin URI: https://wordpress.org/plugins/chronopress-countdown-block/
 * Description: A powerful Gutenberg block for creating beautiful countdown timers with multiple styles and customizable display units.
 * Version: 1.0.0
 * Author: Dhrashti Patel
 * Author URI: https://profiles.wordpress.org/dhrashtidev/
 * License: GPL v2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: advanced-countdown-timer-block
 * Domain Path: /languages
 * Requires at least: 5.8
 * Tested up to: 6.9
 * Requires PHP: 7.4
 *
 * @package ChronoPressCountdownBlock
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

// Define plugin constants.
define( 'CHRONOPRESS_COUNTDOWN_BLOCK_VERSION', '1.0.0' );
define( 'CHRONOPRESS_COUNTDOWN_BLOCK_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
define( 'CHRONOPRESS_COUNTDOWN_BLOCK_PLUGIN_URL', plugin_dir_url( __FILE__ ) );

/**
 * Register the countdown timer block.
 */
function chronopress_countdown_block_register_block() {
	// Check if Gutenberg is active.
	if ( ! function_exists( 'register_block_type' ) ) {
		return;
	}

	// Include the render callback function.
	require_once CHRONOPRESS_COUNTDOWN_BLOCK_PLUGIN_DIR . 'blocks/countdown/block.php';

	// Register editor script.
	wp_register_script(
		'chronopress-countdown-block-editor',
		CHRONOPRESS_COUNTDOWN_BLOCK_PLUGIN_URL . 'blocks/countdown/editor.js',
		array( 'wp-blocks', 'wp-element', 'wp-components', 'wp-block-editor', 'wp-i18n', 'wp-date' ),
		CHRONOPRESS_COUNTDOWN_BLOCK_VERSION,
		true
	);

	// Register frontend script.
	wp_register_script(
		'chronopress-countdown-block-frontend',
		CHRONOPRESS_COUNTDOWN_BLOCK_PLUGIN_URL . 'blocks/countdown/frontend.js',
		array(),
		CHRONOPRESS_COUNTDOWN_BLOCK_VERSION,
		true
	);

	// Register editor styles.
	wp_register_style(
		'chronopress-countdown-block-editor',
		CHRONOPRESS_COUNTDOWN_BLOCK_PLUGIN_URL . 'blocks/countdown/editor.css',
		array( 'wp-edit-blocks' ),
		CHRONOPRESS_COUNTDOWN_BLOCK_VERSION
	);

	// Register frontend styles.
	wp_register_style(
		'chronopress-countdown-block-style',
		CHRONOPRESS_COUNTDOWN_BLOCK_PLUGIN_URL . 'blocks/countdown/style.css',
		array(),
		CHRONOPRESS_COUNTDOWN_BLOCK_VERSION
	);

	// Register flip animation styles.
	wp_register_style(
		'chronopress-countdown-block-flip',
		CHRONOPRESS_COUNTDOWN_BLOCK_PLUGIN_URL . 'assets/flip-animation.css',
		array(),
		CHRONOPRESS_COUNTDOWN_BLOCK_VERSION
	);

	// Get timezone for JavaScript.
	$timezone_string = get_option( 'timezone_string' );
	if ( empty( $timezone_string ) ) {
		$gmt_offset = get_option( 'gmt_offset' );
		$timezone_string = 'UTC' . ( $gmt_offset >= 0 ? '+' : '' ) . $gmt_offset;
	}
	$timezone_string = sanitize_text_field( $timezone_string );

	// Localize script with timezone data.
	wp_localize_script(
		'chronopress-countdown-block-editor',
		'chronopressCountdownBlock',
		array(
			'timezone' => $timezone_string,
		)
	);

	wp_localize_script(
		'chronopress-countdown-block-frontend',
		'chronopressCountdownBlock',
		array(
			'timezone' => $timezone_string,
		)
	);

	// Register the block using block.json.
	register_block_type(
		CHRONOPRESS_COUNTDOWN_BLOCK_PLUGIN_DIR . 'blocks/countdown',
		array(
			'render_callback' => 'chronopress_countdown_block_render_block',
		)
	);
}
add_action( 'init', 'chronopress_countdown_block_register_block' );


/**
 * Conditionally enqueue flip animation styles and ensure frontend script loads.
 */
function chronopress_countdown_block_enqueue_flip_styles() {
	// Check if block exists on page.
	if ( has_block( 'chronopress-countdown-block/countdown' ) ) {
		// Ensure frontend script is enqueued.
		wp_enqueue_script( 'chronopress-countdown-block-frontend' );
		
		global $post;
		if ( $post && has_blocks( $post->post_content ) ) {
			$blocks = parse_blocks( $post->post_content );
			$has_flip_style = false;
			
			foreach ( $blocks as $block ) {
				if ( isset( $block['blockName'] ) && 'chronopress-countdown-block/countdown' === $block['blockName'] ) {
					$style = isset( $block['attrs']['style'] ) ? sanitize_text_field( $block['attrs']['style'] ) : 'circle';
					$allowed_styles = array( 'circle', 'flip', 'linear', 'box' );
					if ( in_array( $style, $allowed_styles, true ) && 'flip' === $style ) {
						$has_flip_style = true;
						break;
					}
				}
			}
			
			if ( $has_flip_style ) {
				wp_enqueue_style( 'chronopress-countdown-block-flip' );
			}
		}
	}
}
add_action( 'wp_enqueue_scripts', 'chronopress_countdown_block_enqueue_flip_styles' );