<?php

declare(strict_types=1);

namespace RenzoJohnson\Blocks\Variables;

\defined( 'ABSPATH' ) || exit;

final class VariableResolver {

	/** @var array<string, string>|null */
	private ?array $map = null;

	/** @param array<string, string> $option_tokens */
	public function __construct(
		private readonly \Blocks_Settings_Repository $settings,
		private readonly array $option_tokens,
	) {
	}

	public function replace_html( string $content ): string {
		if ( false === \stripos( $content, 'blocks:' ) ) {
			return $content;
		}

		$replaced = \preg_replace_callback(
			'/\{\{\s*blocks:([A-Za-z0-9_]{1,40})\s*\}\}/i',
			fn ( array $matches ): string => \esc_html( $this->resolve( \strtolower( $matches[1] ) ) ),
			$content,
		);

		return \is_string( $replaced ) ? $replaced : $content;
	}

	public function resolve( string $name ): string {
		return $this->map()[ \strtolower( $name ) ] ?? '';
	}

	/** @return array<string, string> */
	public function public_variables(): array {
		$variables = array();

		foreach ( $this->option_tokens as $option_name => $token_name ) {
			$variables[ $token_name ] = \str_ends_with( $token_name, '_url' )
				? $this->image_url( $option_name )
				: $this->settings->get_string( $option_name );
		}

		$site_title  = $variables['site_title'];
		$tagline     = $variables['tagline'];
		$date_format = \get_option( 'date_format' );
		$date_format = \is_string( $date_format ) && '' !== $date_format ? $date_format : 'F j, Y';

		return \array_merge(
			$variables,
			array(
				'phone_plain' => (string) \preg_replace( '/[^0-9]/', '', $variables['phone'] ),
				'site_title'  => '' !== $site_title ? $site_title : (string) \get_bloginfo( 'name' ),
				'tagline'     => '' !== $tagline ? $tagline : (string) \get_bloginfo( 'description' ),
				'site_url'    => (string) \home_url( '/' ),
				'year'        => (string) \wp_date( 'Y' ),
				'month'       => (string) \wp_date( 'F' ),
				'today'       => (string) \wp_date( $date_format ),
			),
		);
	}

	public function flush(): void {
		$this->map = null;
	}

	/** @return array<string, string> */
	private function map(): array {
		if ( null === $this->map ) {
			$this->map = $this->public_variables();
		}

		return $this->map;
	}

	private function image_url( string $option_name ): string {
		$attachment_id = $this->settings->get_int( $option_name );

		if ( 0 >= $attachment_id ) {
			return '';
		}

		$url = \wp_get_attachment_url( $attachment_id );

		return \is_string( $url ) ? $url : '';
	}
}