<?php

/**
 * Class Wiaas_Package_Pricing
 */
class Wiaas_Package_Pricing {

	/**
	 * Available pay types for wiaas packages
	 * @var array
	 */
	private static $pay_types = array(
		'purchase' => array(
			'title' => 'Purchase',
			'package_pay_period' => 0,
			'services_contract_period' => 0,
			'max_contract_period' => 36,
			'period_unit' => 'month',
			'labe'
		),
		'purchase_24' => array(
			'title' => 'Purchase with 24M commitment',
			'package_pay_period' => 0,
			'services_contract_period' => 24,
			'max_contract_period' => 36,
			'period_unit' => 'month'
		),
		'managed_36' => array(
			'title' => 'Managed service 36M rent',
			'package_pay_period' => 36,
			'services_contract_period'=> 36,
			'max_contract_period' => 36,
			'period_unit' => 'month'
		)
	);

	/**
	 * Payment fields for pricing rules
	 * @var array
	 */
	private static $payment_fields = array(
		'minimal_fixed_price' => 0,
		'principal_amount' => 0,
		'minimal_services_price' => 0
	);

	/**
	 * Meta key for pricing rules
	 * @var string
	 */
	private static $package_prices_meta_key = '_wiaas_pricing_rules';

	public static function init() {

		add_filter( 'woocommerce_product_get_price', array( __CLASS__, 'on_get_price' ), 10, 2 );

		add_filter('woocommerce_checkout_create_order_line_item_object', array( __CLASS__, 'record_price_for_order_line_item' ), 10, 4);
	}

	/**
	 * Get configuration for available payment types
	 * @return array
	 */
	public static function get_available_pay_types() {
		return self::$pay_types;
	}

	/**
	 * Get empty payment rule with initialized fields to default values
	 * @return array
	 */
	public static function get_empty_pricing_rule() {
		return self::$payment_fields;
	}

	/**
	 * Retrieve customer selected package price from session when adding package to cart
	 * @param $base_price
	 * @param $product
	 *
	 * @return mixed
	 */
	public static function on_get_price($base_price, $package) {
		if ( empty( $package ) ||
		     empty( $base_price ) ||
		     $package->get_type() !== 'bundle' ||
		     !isset(WC()->session)) {
			return $base_price;
		}
		$result_price = $base_price;

		$preferred_price_id = WC()->session->get('wiaas_price_' . $package->get_id(), null);

		if (isset($preferred_price_id)) {
			$prices = self::get_package_prices($package);
			$preferred_price = $prices[$preferred_price_id];
			$result_price = $preferred_price['minimal_fixed_price'];
		}

		return $result_price;
	}

	/**
	 * Persist used payment type informations for package in corresponding order line item
	 * @param $order_item
	 * @param $cart_item_key
	 * @param $cart_item
	 * @param $order
	 *
	 * @return mixed
	 */
	public static function record_price_for_order_line_item($order_item, $cart_item_key, $cart_item, $order) {
		if (wc_pb_is_bundle_container_cart_item($cart_item)) {
			$order_item->add_meta_data('_wiaas_payment', $cart_item['_wiaas_price']);
		}

		return $order_item;
	}

	/**
	 * Retrieve configured payment prices for package
	 * @param $package
	 *
	 * @return array
	 */
	public static function get_package_prices($package) {
		$pricing_rules = $package->get_meta( self::$package_prices_meta_key );

		$prices = array();
		foreach ($pricing_rules as $type => $pricing_rule) {

			$pay_type = self::$pay_types[$type];

			$prices[$type] = array(
				'id' => $type,
				'payment_type' => $pay_type['title'],
				'max_contract_period' => $pay_type['max_contract_period'],
				'package_pay_period' => floatval($pay_type['package_pay_period']),
				'period_unit' => $pay_type['period_unit'],
				'services_contract_period' => $pay_type['services_contract_period'],

				'minimal_fixed_price' => floatval($pricing_rule['minimal_fixed_price']),
				'principal_amount' => floatval($pricing_rule['principal_amount']),
				'recurrent_price' => 0,
				'minimal_services_price' => floatval($pricing_rule['minimal_services_price']),
			);
		}

		return $prices;
	}

	/**
	 * Persist payment prices configuration for package
	 * @param $package
	 * @param $pricing_rules
	 */
	public static function set_package_prices($package, $pricing_rules) {
		if ( isset( $pricing_rules ) ) {
			$package->update_meta_data( self::$package_prices_meta_key, $pricing_rules );
		} else {
			$package->delete_meta_data( self::$package_prices_meta_key );
		}
		$package->save_meta_data();
	}
}

Wiaas_Package_Pricing::init();