<?php

namespace IPSCMI\Order\Cart\Config;

defined( 'ABSPATH' ) || exit;

/**
 * Immutable description of the currently built package.
 *
 * Package profiles are build-time boundaries. Runtime filters must never be
 * able to turn a Core package into Pro or an IPS package into WordPress.org.
 */
final class PackageProfile {
	public const EDITION_CORE = 'core';
	public const EDITION_PRO  = 'pro';
	public const EDITION_FULL = 'full';

	public const CHANNEL_DEVELOPMENT   = 'development';
	public const CHANNEL_IPS           = 'ips';
	public const CHANNEL_WORDPRESS_ORG = 'wordpress-org';

	public const ACCESS_INTERNAL = 'internal';
	public const ACCESS_PUBLIC   = 'public';
	public const ACCESS_LICENSED = 'licensed';

	/** @var string */
	private $edition;

	/** @var string */
	private $channel;

	/** @var string */
	private $access_mode;

	/** @var string */
	private $package_slug;

	/** @var string */
	private $package_name;

	/** @var string */
	private $plugin_file;

	private function __construct(
		string $edition,
		string $channel,
		string $access_mode,
		string $package_slug,
		string $package_name,
		string $plugin_file
	) {
		$this->edition      = $edition;
		$this->channel      = $channel;
		$this->access_mode  = $access_mode;
		$this->package_slug = $package_slug;
		$this->package_name = $package_name;
		$this->plugin_file  = $plugin_file;
	}

	public static function from_runtime(): self {
		$has_release_markers = defined( 'IPSCMI_ORDER_CART_RELEASE_PACKAGE_SLUG' )
			|| defined( 'IPSCMI_ORDER_CART_RELEASE_PACKAGE_NAME' )
			|| defined( 'IPSCMI_ORDER_CART_RELEASE_PLUGIN_FILE' )
			|| defined( 'IPSCMI_ORDER_CART_RELEASE_ACCESS_MODE' )
			|| defined( 'IPSCMI_ORDER_CART_RELEASE_CHANNEL' );

		$edition = defined( 'IPSCMI_ORDER_CART_EDITION' )
			? (string) IPSCMI_ORDER_CART_EDITION
			: self::environment_value( 'IPSCMI_ORDER_CART_LOCAL_EDITION' );

		if ( '' === $edition ) {
			$edition = $has_release_markers ? self::EDITION_CORE : self::EDITION_FULL;
		}

		$channel = defined( 'IPSCMI_ORDER_CART_RELEASE_CHANNEL' )
			? (string) IPSCMI_ORDER_CART_RELEASE_CHANNEL
			: self::environment_value( 'IPSCMI_ORDER_CART_LOCAL_CHANNEL' );

		if ( '' === $channel ) {
			$channel = $has_release_markers ? self::CHANNEL_IPS : self::CHANNEL_DEVELOPMENT;
		}

		$access_mode = defined( 'IPSCMI_ORDER_CART_RELEASE_ACCESS_MODE' )
			? (string) IPSCMI_ORDER_CART_RELEASE_ACCESS_MODE
			: self::environment_value( 'IPSCMI_ORDER_CART_LOCAL_ACCESS_MODE' );

		if ( '' === $access_mode ) {
			$access_mode = $has_release_markers ? self::ACCESS_PUBLIC : self::ACCESS_INTERNAL;
		}

		$edition     = self::normalize( $edition, array( self::EDITION_CORE, self::EDITION_PRO, self::EDITION_FULL ), self::EDITION_CORE );
		$channel     = self::normalize( $channel, array( self::CHANNEL_DEVELOPMENT, self::CHANNEL_IPS, self::CHANNEL_WORDPRESS_ORG ), self::CHANNEL_IPS );
		$access_mode = self::normalize( $access_mode, array( self::ACCESS_INTERNAL, self::ACCESS_PUBLIC, self::ACCESS_LICENSED ), self::ACCESS_PUBLIC );

		// WordPress.org packages are always free Core packages. Fail closed when
		// inconsistent constants are supplied by a hand-built artifact.
		if ( self::CHANNEL_WORDPRESS_ORG === $channel ) {
			$edition     = self::EDITION_CORE;
			$access_mode = self::ACCESS_PUBLIC;
		}

		$package_slug = defined( 'IPSCMI_ORDER_CART_RELEASE_PACKAGE_SLUG' )
			? self::sanitize_slug( (string) IPSCMI_ORDER_CART_RELEASE_PACKAGE_SLUG )
			: 'ips-order-cart';
		$package_name = defined( 'IPSCMI_ORDER_CART_RELEASE_PACKAGE_NAME' )
			? sanitize_text_field( (string) IPSCMI_ORDER_CART_RELEASE_PACKAGE_NAME )
			: 'IPS Cart&Checkout for WooCommerce';
		$plugin_file = defined( 'IPSCMI_ORDER_CART_RELEASE_PLUGIN_FILE' )
			? self::sanitize_plugin_file( (string) IPSCMI_ORDER_CART_RELEASE_PLUGIN_FILE )
			: 'ips-order-cart/ips-order-cart.php';

		return new self( $edition, $channel, $access_mode, $package_slug, $package_name, $plugin_file );
	}

	public function edition(): string {
		return $this->edition;
	}

	public function channel(): string {
		return $this->channel;
	}

	public function access_mode(): string {
		return $this->access_mode;
	}

	public function package_slug(): string {
		return $this->package_slug;
	}

	public function package_name(): string {
		return $this->package_name;
	}

	public function plugin_file(): string {
		return $this->plugin_file;
	}

	public function includes_pro(): bool {
		return in_array( $this->edition, array( self::EDITION_PRO, self::EDITION_FULL ), true );
	}

	public function is_wordpress_org(): bool {
		return self::CHANNEL_WORDPRESS_ORG === $this->channel;
	}

	public function uses_ips_distribution(): bool {
		return self::CHANNEL_IPS === $this->channel;
	}

	public function requires_license(): bool {
		return $this->uses_ips_distribution()
			&& self::ACCESS_LICENSED === $this->access_mode
			&& $this->includes_pro();
	}

	/**
	 * @return array<string,string>
	 */
	public function to_array(): array {
		return array(
			'edition'      => $this->edition,
			'channel'      => $this->channel,
			'accessMode'   => $this->access_mode,
			'packageSlug'  => $this->package_slug,
			'packageName'  => $this->package_name,
			'pluginFile'   => $this->plugin_file,
		);
	}

	private static function environment_value( string $name ): string {
		if ( defined( $name ) ) {
			return (string) constant( $name );
		}

		$value = getenv( $name );

		return is_string( $value ) ? $value : '';
	}

	/**
	 * @param string[] $allowed
	 */
	private static function normalize( string $value, array $allowed, string $fallback ): string {
		$value = function_exists( 'sanitize_key' )
			? sanitize_key( $value )
			: (string) preg_replace( '/[^a-z0-9_-]/', '', strtolower( $value ) );

		return in_array( $value, $allowed, true ) ? $value : $fallback;
	}

	private static function sanitize_slug( string $value ): string {
		$value = function_exists( 'sanitize_key' )
			? sanitize_key( $value )
			: (string) preg_replace( '/[^a-z0-9_-]/', '', strtolower( $value ) );

		return '' !== $value ? $value : 'ips-order-cart';
	}

	private static function sanitize_plugin_file( string $value ): string {
		$value = wp_normalize_path( trim( $value ) );
		$value = ltrim( $value, '/' );

		if ( false !== strpos( $value, '..' ) || ! preg_match( '#^[a-z0-9._-]+/[a-z0-9._-]+\.php$#i', $value ) ) {
			return 'ips-order-cart/ips-order-cart.php';
		}

		return $value;
	}
}