<?php

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly
}

class WPF_CoursePress extends WPF_Integrations_Base {

    /**
     * Gets things started.
     *
     * @since 3.23.1
     */

    public function init() {

        $this->slug = 'coursepress';

        add_action( 'coursepress_student_unit_completed', array( $this, 'unit_completed' ), 10, 4 );

        add_action( 'coursepress_student_course_completed', array( $this, 'course_completed' ), 10, 3 );

        add_action( 'add_meta_boxes', array( $this, 'add_meta_box' ), 20 );

        add_action( 'wp_ajax_wpf_coursepress_save', array( $this, 'save_meta_box_data' ) );

    }

    /**
     * Apply tags on unit completion.
     *
     * @since 3.23.1
     *
     * @param int    $user_id    The user ID.
     * @param int    $unit_id    The unit ID.
     * @param string $unit_title The unit title.
     * @param int    $course_id  The course ID.
     */
    public function unit_completed( $user_id, $unit_id, $unit_title, $course_id ) {

        $settings = get_post_meta( $unit_id, 'wpf_settings_coursepress', true );

        if ( ! empty( $settings ) && ! empty( $settings['apply_tags_complete'] ) ) {

            wp_fusion()->user->apply_tags( $settings['apply_tags_complete'], $user_id );

        }

    }


    /**
     * Apply tags on course completion.
     *
     * @since 3.23.1
     *
     * @param int    $user_id    The user ID.
     * @param int    $course_id  The course ID.
     * @param string $unit_title The course title.
     */

    public function course_completed( $user_id, $course_id, $course_title ) {

        $settings = get_post_meta( $course_id, 'wpf_settings_coursepress', true );

        if ( ! empty( $settings ) && ! empty( $settings['apply_tags_complete'] ) ) {

            wp_fusion()->user->apply_tags( $settings['apply_tags_complete'], $user_id );

        }

    }


    /**
     * Adds meta box to Course post type.
     *
     * @since 3.23.1
     */

    /**
     * Adds meta box to Course post type.
     *
     * @since 3.23.1
     *
     * @param int $post_id The post ID.
     */
    public function add_meta_box( $post_id ) {

        add_meta_box( 'wpf-coursepress-meta', 'WP Fusion - Course Settings', array( $this, 'meta_box_callback' ), 'course' );

    }


    /**
     * Displays meta box content.
     *
     * @since 3.23.1
     *
     * @param WP_Post $post   The post object.
     * @return mixed HTML settings output.
     */
    public function meta_box_callback( $post ) {

        wp_nonce_field( 'wpf_meta_box_coursepress', 'wpf_meta_box_coursepress_nonce' );

        $settings = array(
            'apply_tags_complete' => array(),
        );

        if ( get_post_meta( $post->ID, 'wpf_settings_coursepress', true ) ) {
            $settings = array_merge( $settings, get_post_meta( $post->ID, 'wpf_settings_coursepress', true ) );
        }

        echo '<h3>Course settings:</h3>';

        echo '<table class="form-table"><tbody>';

        echo '<tr>';

        echo '<th scope="row"><label for="apply_tags_complete">Apply tags:</label></th>';
        echo '<td>';

        $args = array(
            'setting'   => $settings['apply_tags_complete'],
            'meta_name' => 'wpf_settings_coursepress',
            'field_id'  => 'apply_tags_complete',
        );

        wpf_render_tag_multiselect( $args );

        echo '<span class="description">These tags will be applied when the course is marked complete.</span>';
        echo '</td>';

        echo '</tr>';

        echo '</tbody></table>';

        echo '<hr />';

        echo '<h3>Unit Settings:</h3>';

        $units = get_post_meta( $post->ID, 'cp_structure_visible_units', true );

        if ( ! empty( $units ) ) {

            echo '<table class="form-table"><tbody>';

            foreach ( $units as $unit_id => $visible ) {

                $title = get_the_title( $unit_id );

                if ( empty( $title ) ) {
                    continue;
                }

                $settings = get_post_meta( $unit_id, 'wpf_settings_coursepress', true );

                if ( empty( $settings ) ) {
                    $settings = array();
                }

                if ( ! isset( $settings['apply_tags_complete'] ) ) {
                    $settings['apply_tags_complete'] = array();
                }

                echo '<tr>';

                echo '<th scope="row"><label for="apply_tags_complete">' . $title . ':</label></th>';
                echo '<td>';

                $args = array(
                    'setting'   => $settings['apply_tags_complete'],
                    'meta_name' => 'wpf_settings_coursepress',
                    'field_id'  => 'apply_tags_unit_' . $unit_id,
                );

                wpf_render_tag_multiselect( $args );

                echo '<span class="description">These tags will be applied when the unit <strong>' . $title . '</strong> is marked complete.</span>';
                echo '</td>';

                echo '</tr>';

            }

            echo '</tbody></table>';

        } else {

            echo '<br/><br/>Create some units to configure unit tagging.';

        }

        echo '<table class="form-table"><tbody>';

        echo '<tr>';

        echo '<th scope="row"></th>';
        echo '<td>';

            echo '<input type="hidden" id="wpf-coursepress-postid" value="' . $post->ID . '">';

            echo '<a href="#" id="wpf-coursepress-update" class="button">Update</a>';

        echo '</td>';

        echo '</tr>';

        echo '</tbody></table>';

    }


    /**
     * Save the settings to the course.
     *
     * @since 3.23.1
     */

    public function save_meta_box_data() {

        $post_id = $_POST['id'];

        $update_values = array();

        foreach ( $_POST['data'] as $setting ) {

            if ( 'wpf_settings_coursepress[apply_tags_complete][]' == $setting['name'] ) {

                if ( ! isset( $update_values[ $post_id ] ) ) {
                    $update_values[ $post_id ] = array();
                }

                $update_values[ $post_id ][] = $setting['value'];

            } else {

                $unit_id = str_replace( 'wpf_settings_coursepress[apply_tags_unit_', '', $setting['name'] );

                $unit_id = str_replace( '][]', '', $unit_id );

                if ( ! isset( $update_values[ $unit_id ] ) ) {
                    $update_values[ $unit_id ] = array();
                }

                $update_values[ $unit_id ][] = $setting['value'];

            }
        }

        foreach ( $update_values as $post_id => $tags ) {

            // Update the meta fields in the database.
            update_post_meta( $post_id, 'wpf_settings_coursepress', array( 'apply_tags_complete' => $tags ) );

        }

    }


}

new WPF_CoursePress;