<?php

abstract class VideoPressHQServerBlock {
	abstract protected function get_block_name(): string;
	abstract protected function get_view_name(): string;

	protected function register_scripts_and_styles() {}

	protected function get_block_register_params(): array {
		return array();
	}

	protected function get_view_vars( $attibutes, $content, $block ): array {
		return array();
	}

	public static function register() {
		$instance = new static();

		$instance->register_scripts_and_styles();

		$register_params = $instance->get_block_register_params();
		$register_params = array_merge(
			$register_params,
			array(
				'render_callback' => array( $instance, 'render' ),
			)
		);

		register_block_type( 'videopress-hq/' . $instance->get_block_name(), $register_params );
	}

	protected function block_asset_uri( $asset ) {
		return get_template_directory_uri() . '/assets/js/blocks/' . $this->get_block_name()  . '/' . $asset;
	}

	protected function after_view_rendered( $view_content, $attributes, $content, $block ) {
		return $view_content;
	}

	public function render( $attributes, $content, $block ) {
		if ( ! is_array( $attributes ) ) {
			$attributes = array();
		}

		$view_vars = $this->get_view_vars( $attributes, $content, $block );
		$view_vars = array_merge( $view_vars, array( 'attributes' => $attributes ) );

		$view_content = $this->get_view_content( $this->get_view_name(), $view_vars );
		return $this->after_view_rendered( $view_content, $attributes, $content, $block );
	}

	private function get_view_content( $view, $template_args = array() ) {
		global $wp_embed;
		ob_start();
		extract( $template_args );
		include VPHQ_ROOT . '/server-blocks/views/' . $view . '.php';
		$view_content = ob_get_clean();

		// If the page contains embed, they should be ran manually through wp_embed, see https://github.com/WordPress/gutenberg/issues/19114 .
		$view_content = $wp_embed->run_shortcode( $view_content );
		$view_content = $wp_embed->autoembed( $view_content );

		return do_blocks( $view_content );
	}
}