<?php

namespace AC\Controller;

use AC;
use AC\Column;
use AC\Column\Placeholder;
use AC\ListScreen;
use AC\Request;
use AC\View;

abstract class ColumnRequest {

	private $list_screen_factory;

	public function __construct( AC\ListScreenFactory $list_screen_factory ) {
		$this->list_screen_factory = $list_screen_factory;
	}

	abstract protected function get_column( Request $request, ListScreen $list_screen ): ?Column;

	public function request( Request $request ): void {
		$list_key = (string) $request->get( 'list_screen' );

		if ( ! $this->list_screen_factory->can_create( $list_key ) ) {
			exit;
		}

		$list_screen = $this->list_screen_factory->create( $list_key );

		$column = $this->get_column( $request, $list_screen );

		if ( ! $column ) {
			wp_send_json_error( [
				'type'  => 'message',
				'error' => sprintf( __( 'Please visit the %s screen once to load all available columns', 'codepress-admin-columns' ), ac_helper()->html->link( $list_screen->get_screen_link(), $list_screen->get_label() ) ),
			] );
		}

		$current_original_columns = (array) json_decode( $request->get( 'current_original_columns', '' ), true );

		// Not cloneable message
		if ( in_array( $column->get_type(), $current_original_columns, true ) ) {
			wp_send_json_error( [
				'type'  => 'message',
				'error' => sprintf(
					__( '%s column is already present and can not be duplicated.', 'codepress-admin-columns' ),
					'<strong>' . $column->get_label() . '</strong>' ),
			] );
		}

		// Placeholder message
		if ( $column instanceof Placeholder ) {
			wp_send_json_error( [
				'type'  => 'message',
				'error' => $column->get_message(),
			] );
		}

		wp_send_json_success( $this->render_column( $column ) );
	}

	private function render_column( Column $column ): string {
		$view = new View( [
			'column' => $column,
		] );

		$view->set_template( 'admin/edit-column' );

		return $view->render();
	}

}