<?php
/**
 * Immutable sync package value object.
 *
 * @package WPContentSync
 */

namespace WPContentSync\Package;

final class ContentPackage {
	public const SCHEMA_VERSION = '1.0';

	/** @var array<string, mixed> */
	private array $data;

	/**
	 * @param array<string, mixed> $data Package data.
	 */
	private function __construct( array $data ) {
		$this->data = $data;
	}

	/**
	 * @param array<string, mixed> $data Package data.
	 */
	public static function fromArray( array $data ): self {
		return new self(
			array(
				'schema_version' => (string) ( $data['schema_version'] ?? self::SCHEMA_VERSION ),
				'generated_at'   => (string) ( $data['generated_at'] ?? '' ),
				'source'         => self::arrayValue( $data['source'] ?? array() ),
				'destination'    => self::arrayValue( $data['destination'] ?? array() ),
				'manifest'       => self::arrayValue( $data['manifest'] ?? array() ),
				'records'        => self::arrayValue( $data['records'] ?? array() ),
				'checksums'      => self::arrayValue( $data['checksums'] ?? array() ),
			)
		);
	}

	public function schemaVersion(): string {
		return $this->data['schema_version'];
	}

	public function generatedAt(): string {
		return $this->data['generated_at'];
	}

	/**
	 * @return array<string, mixed>
	 */
	public function source(): array {
		return $this->data['source'];
	}

	/**
	 * @return array<string, mixed>
	 */
	public function destination(): array {
		return $this->data['destination'];
	}

	/**
	 * @return array<string, mixed>
	 */
	public function manifest(): array {
		return $this->data['manifest'];
	}

	/**
	 * @return array<string, mixed>
	 */
	public function records(): array {
		return $this->data['records'];
	}

	/**
	 * @return array<string, mixed>
	 */
	public function checksums(): array {
		return $this->data['checksums'];
	}

	/**
	 * @return array<string, mixed>
	 */
	public function toArray(): array {
		return $this->data;
	}

	/**
	 * @param mixed $value Value to normalize.
	 *
	 * @return array<string, mixed>
	 */
	private static function arrayValue( $value ): array {
		return is_array( $value ) ? $value : array();
	}
}