<?php
/**
 * Plugin bootstrap.
 *
 * @package ForWP\Weather
 */

namespace ForWP\Weather;

defined( 'ABSPATH' ) || exit;

/**
 * Main plugin singleton.
 */
final class Plugin {

	/**
	 * Singleton instance.
	 *
	 * @var self|null
	 */
	private static ?self $instance = null;

	/**
	 * Singleton accessor.
	 */
	public static function instance(): self {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}

		return self::$instance;
	}

	/**
	 * Private constructor; use instance().
	 */
	private function __construct() {}

	/**
	 * Boot hooks.
	 */
	public function boot(): void {
		add_action( 'init', array( $this, 'register_block' ) );
		add_filter( 'block_type_metadata', array( $this, 'filter_block_metadata_defaults' ), 10, 1 );
		add_action( 'wp_enqueue_scripts', array( $this, 'localize_view_script' ), 20 );
		add_action( 'enqueue_block_editor_assets', array( $this, 'localize_editor_providers' ), 20 );

		Widget_Templates::maybe_seed_site_defaults();

		Admin_Settings::instance()->boot();
		Admin_Bar_Weather::boot();

		Rest_Weather::register();

		if ( defined( 'WP_CLI' ) && WP_CLI && class_exists( '\WP_CLI' ) ) {
			\WP_CLI::add_command( 'forwp-weather flush-cache', array( Cli_Command::class, 'flush_cache' ) );
		}
	}

	/**
	 * Register block type from built assets.
	 */
	public function register_block(): void {
		$block_json = FORWP_WEATHER_PATH . 'build/weather/block.json';
		if ( ! is_readable( $block_json ) ) {
			return;
		}

		register_block_type( dirname( $block_json ) );
	}

	/**
	 * Provide REST configuration to the frontend script handle registered by the block.
	 */
	public function localize_view_script(): void {
		if ( is_admin() ) {
			return;
		}

		$handle = 'forwp-weather-view-script';
		if ( ! wp_script_is( $handle, 'registered' ) ) {
			return;
		}

		/* translators: %d: whole seconds remaining before the visitor may change location again. */
		$cooldown_wait_message = __( 'Please wait %d seconds before changing location again.', '4wp-weather' );

		wp_localize_script(
			$handle,
			'forwpWeather',
			array(
				'restUrl'      => rest_url( 'forwp-weather/v1/' ),
				'nonce'        => wp_create_nonce( 'wp_rest' ),
				'providers'    => Provider_Registry::get_editor_choices(),
				'outputJsonLd' => Admin_Settings::instance()->get_output_json_ld(),
				'strings'      => array(
					'cooldownWait' => $cooldown_wait_message,
				),
			)
		);
	}

	/**
	 * Editor script: provider choices for Inspector (implemented vs planned).
	 */
	public function localize_editor_providers(): void {
		$handle = 'forwp-weather-editor-script';
		if ( ! wp_script_is( $handle, 'registered' ) ) {
			return;
		}

		wp_add_inline_script(
			$handle,
			'window.forwpWeatherProviders = ' . wp_json_encode( Provider_Registry::get_editor_choices() ) . ';',
			'before'
		);

		$presets = array();
		foreach ( Widget_Templates::layout_slugs() as $layout ) {
			foreach ( Widget_Templates::style_slugs() as $style ) {
				$key           = $layout . ':' . $style;
				$presets[ $key ] = Widget_Templates::get_preset_attributes( $layout, $style );
			}
		}

		wp_add_inline_script(
			$handle,
			'window.forwpWeatherTemplates = ' . wp_json_encode(
				array(
					'defaultLayout' => Widget_Templates::get_site_default_layout(),
					'defaultStyle'  => Widget_Templates::get_site_default_style(),
					'layouts'       => Widget_Templates::get_layout_catalog(),
					'styles'        => Widget_Templates::get_style_catalog(),
					'presets'       => $presets,
				)
			) . ';',
			'before'
		);
	}

	/**
	 * New blocks inherit site default widget template attributes.
	 *
	 * @param array<string, mixed> $metadata Block metadata from block.json.
	 * @return array<string, mixed>
	 */
	public function filter_block_metadata_defaults( array $metadata ): array {
		if ( ( $metadata['name'] ?? '' ) !== 'forwp/weather' ) {
			return $metadata;
		}

		if ( ! isset( $metadata['attributes'] ) || ! is_array( $metadata['attributes'] ) ) {
			$metadata['attributes'] = array();
		}

		/*
		 * Only seed layout/style for new inserts. Do not override show* or
		 * fieldPresentation defaults site-wide — that breaks saved per-block overrides on render.
		 */
		$layout_default = Widget_Templates::get_site_default_layout();
		$style_default  = Widget_Templates::get_site_default_style();

		if ( isset( $metadata['attributes']['widgetTemplate'] ) ) {
			$metadata['attributes']['widgetTemplate']['default'] = $layout_default;
		}
		if ( isset( $metadata['attributes']['widgetStyle'] ) ) {
			$metadata['attributes']['widgetStyle']['default'] = $style_default;
		}

		return $metadata;
	}

}