<?php

namespace WeDevs\Wpuf\Pro;

use WeDevs\Wpuf\Traits\TaxableTrait;

/**
 * Coupon class
 *
 * @package WPUF
 */
class Coupons {

    use TaxableTrait;

    /**
     * Cancel a coupon via Ajax
     *
     * It cancels the coupon and returns again the pack details to
     * render on the page.
     *
     * @return array
     */
    function cancel_coupon() {
        check_ajax_referer( 'wpuf_nonce' );
        $pack         = wpuf()->subscription->get_subscription( $_POST['pack_id'] );
        $details_meta = wpuf()->subscription->get_details_meta_value();
        $send_data = [
            'append_data' => $this->after_apply_coupon( $pack ),
        ];
        wp_send_json_success( $send_data );
    }

    /**
     * Apply a coupon
     *
     * @return json
     */
    function apply_coupon() {
        check_ajax_referer( 'wpuf_nonce' );

        $pack_id     = ! empty( $_POST['pack_id'] ) ? sanitize_text_field( wp_unslash( $_POST['pack_id'] ) ) : 0;
        $coupon_text = ! empty( $_POST['coupon'] ) ? sanitize_text_field( wp_unslash( $_POST['coupon'] ) ) : '';
        $pack        = wpuf()->subscription->get_subscription( $pack_id );

        if ( empty( $coupon_text ) ) {
            wp_send_json_error( [ 'message' => __( 'Sorry invalid coupon code not found!', 'wpuf-pro' ) ] );
        }

        $post = get_posts(
            [
                'post_type'              => 'wpuf_coupon',
                'title'                  => $coupon_text,
                'post_status'            => 'all',
                'numberposts'            => 1,
                'update_post_term_cache' => false,
                'update_post_meta_cache' => false,
            ]
        );

        if ( ! empty( $post ) ) {
            $coupon = $post[0];
        } else {
            $coupon = null;
        }

        if ( ! $coupon ) {
            wp_send_json_error( [ 'message' => __( 'Sorry invalid coupon code!', 'wpuf-pro' ) ] );
        }
        $details_meta  = wpuf()->subscription->get_details_meta_value();
        $coupon_amount = $this->coupon_validation(
            $pack->meta_value['billing_amount'], $coupon->ID, $_POST['pack_id']
        );
        $coupon_usage = get_post_meta( $coupon->ID, '_coupon_used', true );
        $usage_limit  = get_post_meta( $coupon->ID, '_usage_limit', true );
        if ( ! empty( $usage_limit ) && ( (int) $coupon_usage >= (int) $usage_limit ) ) {
            wp_send_json_error( [ 'message' => __( 'Sorry, coupon code usage limit is reached!', 'wpuf-pro' ) ] );
        }
        if ( is_wp_error( $coupon_amount ) ) {
            wp_send_json_error( [ 'message' => $coupon_amount->get_error_message() ] );
        }
        $pack->meta_value['billing_amount'] = $coupon_amount;
        $send_data = [
            'pack_id'     => $pack->ID,
            'coupon_id'   => $coupon->ID,
            'amount'      => apply_filters( 'wpuf_payment_amount', $pack->meta_value['billing_amount'] ),
            'append_data' => $this->after_apply_coupon( $pack ),
            'message'     => __( 'Coupon has been successfully applied.', 'wpuf-pro' ),
        ];
        wp_send_json_success( $send_data );
    }

    function after_apply_coupon( $pack ) {
        ob_start();
        $pack_cost      = $pack->meta_value['billing_amount'];
        $billing_amount = apply_filters( 'wpuf_payment_amount', $pack->meta_value['billing_amount'] );
        $tax_rate       = $this->wpuf_current_tax_rate() . '%';
        ?>
        <div><?php _e( 'Selected Pack', 'wpuf-pro' ); ?>: <strong><?php echo $pack->post_title; ?></strong></div>
        <div><?php _e( 'Pack Price', 'wpuf-pro' ); ?>: <strong><span
                    id="wpuf_pay_page_cost"><?php echo wpuf_format_price( $pack_cost ); ?></strong></span></div>
        <?php if ( $this->wpuf_tax_enabled() ) : ?>
            <div><?php _e( 'Tax', 'wpuf-pro' ); ?>: <strong><span id="wpuf_pay_page_tax"><?php echo $tax_rate; ?>
                </strong></span></div>
        <?php endif; ?>

        <div><?php _e( 'Total', 'wpuf-pro' ); ?>: <strong><span id="wpuf_pay_page_total"><?php echo wpuf_format_price(
                    $billing_amount
                ); ?></strong></span></div>

        <?php
        return ob_get_clean();
    }

    /**
     * Validate a coupon code
     *
     * @param int|float $billing_amount
     * @param int       $coupon_id
     * @param int       $pack_id
     *
     * @return \WP_Error|float
     */
    function coupon_validation( $billing_amount, $coupon_id, $pack_id ) {
        $coupon_meta   = $this->get_coupon_meta( $coupon_id );
        $coupon_amount = wpuf_format_price( $coupon_meta['amount'], false );
        if ( empty( $coupon_amount ) ) {
            return wpuf_format_price( $billing_amount, false );
        }
        $coupon_usage = get_post_meta( $coupon_id, '_coupon_used', true );
        $start_date   = ! empty( $coupon_meta['start_date'] ) ? strtotime(
            date( 'Y-m-d', strtotime( $coupon_meta['start_date'] ) )
        ) : '';
        $end_date     = ! empty( $coupon_meta['end_date'] ) ? strtotime(
            date( 'Y-m-d', strtotime( $coupon_meta['end_date'] ) )
        ) : '';
        $today        = time();
        $pack         = wpuf()->subscription->get_subscription( $pack_id );
        $current_use_email = is_user_logged_in() ? wp_get_current_user()->user_email : '';
        if ( ! in_array( 'all', $coupon_meta['package'] ) && ! in_array( $pack_id, $coupon_meta['package'] ) ) {
            return new \WP_Error( 'message', __( 'Coupon is not availiable for this package!', 'wpuf-pro' ) );
        }
        if ( ! empty( $coupon_meta['usage_limit'] ) && $coupon_meta['usage_limit'] < $coupon_usage ) {
            return new \WP_Error( 'message', __( 'Coupon usage limit exceeded!', 'wpuf-pro' ) );
        }
        if ( ! empty( $start_date ) ) {
            if ( $start_date > $today ) {
                return new \WP_Error( 'message', __( 'Sorry, this coupon is not start!', 'wpuf-pro' ) );
            }
        }
        if ( ! empty( $end_date ) ) {
            if ( $end_date < $today ) {
                return new \WP_Error( 'message', __( 'Sorry, this coupon has been expired!', 'wpuf-pro' ) );
            }
        }
        if ( count( $coupon_meta['access'] ) && ! in_array( $current_use_email, $coupon_meta['access'] ) ) {
            return new \WP_Error( 'message', __( 'You are not allowed to use this coupon!', 'wpuf-pro' ) );
        }
        if ( $coupon_meta['type'] == 'amount' ) {
            $billing_amount = $pack->meta_value['billing_amount'] - $coupon_amount;
        } else if ( $coupon_meta['type'] == 'percent' ) {
            if ( 0 > $coupon_amount ) {
                $coupon_amount = - 1 * $coupon_amount;
            }
            $billing_amount = $pack->meta_value['billing_amount'] - ( $pack->meta_value['billing_amount'] * $coupon_amount ) / 100;
        }
        if ( $billing_amount > 0 ) {
            return wpuf_format_price( $billing_amount, false );
        }

        return 0;
    }

    /**
     * Get discount amount from a coupon
     *
     * @param float $billing_amount
     * @param int   $coupon_id
     * @param int   $pack_id
     *
     * @return float
     */
    function discount( $billing_amount, $coupon_id, $pack_id ) {
        $amount = $this->coupon_validation( $billing_amount, $coupon_id, $pack_id );
        if ( is_wp_error( $amount ) ) {
            return $amount->get_error_message();
        }

        return wpuf_format_price( $amount, false );
    }

    /**
     * Populate all coupon meta
     *
     * @param  int $post_id
     * @return array
     */
    public function get_coupon_meta( $post_id ) {
        $coupon = [];

        $coupon['code']        = get_post_meta( $post_id, '_code', true );
        $coupon['package']     = get_post_meta( $post_id, '_package', true );
        $coupon['start_date']  = get_post_meta( $post_id, '_start_date', true );
        $coupon['end_date']    = get_post_meta( $post_id, '_end_date', true );
        $coupon['type']        = get_post_meta( $post_id, '_type', true );
        $coupon['amount']      = get_post_meta( $post_id, '_amount', true );
        $coupon['usage_limit'] = get_post_meta( $post_id, '_usage_limit', true );
        $coupon['access']      = get_post_meta( $post_id, '_access', true );

        if ( empty( $coupon['code'] ) ) {
            $post = get_post( $post_id );

            if ( ! empty( $post->post_title ) ) {
                $coupon['code'] = $post->post_title;
            }
        }

        return apply_filters( 'wpuf_get_coupon_meta', $coupon, $post_id );
    }

}
