<?php

class Aidm_Admin_Form {
    const ID = 'aidm-admin-form';
    const TITLE = 'IDE Dark Mode';
    const NONCE_KEY = 'aidm_admin';
    
    public function init() {
        add_action( 'admin_menu', array( $this, 'add_menu' ) );
        add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
        add_action( 'admin_post_aidm_save_changes' , array( $this, 'save_changes' ) );

        return;
    }

    public function get_id() {
        return self::ID;
    }

    public function get_title() {
        return self::TITLE;
    }

    public function get_nonce_key() {
        return self::NONCE_KEY;
    }

    /**
     * add aidm plugin item in the admin navigation
     */
    public function add_menu() {
        add_menu_page(
            $this -> get_title(),
            $this -> get_title(),
            'manage_options',
            $this -> get_id(),
            array( &$this, 'load_view' ),
            'dashicons-image-filter'
        );

        return;
    }

    /**
     * enqueue scripts and styles when init()
     */
    public function enqueue_scripts( $hook ) {
        if ( $hook != 'toplevel_page_' . $this -> get_id() ) { // check if on aidm home page
            // this script is available everywhere in the admin, except aidm home page
            $user_theme_preference = get_user_admin_ide_theme_preference();
            
            wp_enqueue_script( 
                'aidmAdmin', 
                plugin_dir_url( __DIR__ ) . 'js/aidmAdmin.js',
            );
            wp_enqueue_style( 
                'aidm-admin', 
                plugin_dir_url( __DIR__ ) . 'code-mirror-css-themes/' . $user_theme_preference . '.css',
            );
            wp_localize_script( 
                'jquery', 
                'aidm_theme_preference', 
                array( 'theme_name' => $user_theme_preference )
            );

            return;
        }

        // the part below is only available for aidm plugin home page

        // load codeMirror editor with type == php
        $cm_settings[ 'codeEditor' ] = wp_enqueue_code_editor( array( 'type' => 'text/x-php' ) );
        wp_localize_script( 'jquery', 'cm_settings', array( $cm_settings ) );

        // enqueue all codeMirror css themes
        $cm_themes_folder = plugin_dir_path( __DIR__ ) . 'code-mirror-css-themes/';
        
        foreach( glob( $cm_themes_folder . '*.css' ) as $filename ) {
            wp_enqueue_style( 
                basename( $filename, '.css' ), 
                plugin_dir_url( __DIR__ ) . 'code-mirror-css-themes/' . basename( $filename ),
            );
        }

        // plugin js
        wp_enqueue_script( 
            'aidmHome', 
            plugin_dir_url( __DIR__ ) . 'js/aidmHome.js',
        );
        // plugin css
        wp_enqueue_style( 
            'aidm-home', 
            plugin_dir_url( __DIR__ ) . 'css/aidm-home.css',
        );

        return;
    }

    /**
     * load plugin html view
     */
    public function load_view() {
        require_once( plugin_dir_path( __DIR__ ) . 'views/aidm-home-views.php' );

        return;
    }

    /**
     * process the form to admin_post.php and save preference in the database
     */
    public function save_changes() {
        $nonce = sanitize_text_field( $_POST[ $this -> get_nonce_key() ]);
        $action = sanitize_text_field( $_POST[ 'action' ] );
        $theme_preference = sanitize_text_field( $_POST[ 'theme' ] );
        $redirect_to =  sanitize_url( $_POST[ 'redirect_to_url' ] );

        if ( ! isset( $nonce ) || ! wp_verify_nonce( $nonce, $action ) ) {
            print 'Sorry, someting went wrong.';
            exit;
        }

        if ( ! current_user_can( 'manage_options' ) ) {
            print 'You can\'t manage options';
            exit;
        }

        $this -> db_update_ide_theme_preference( $theme_preference );

        if( $redirect_to ) {
            wp_safe_redirect( $redirect_to );
            exit;
        }

        return;
    }

    /**
     * update the database
     */
    public function db_update_ide_theme_preference( $theme_preference ) {
        $user_id = get_current_user_id();
        $meta_key = 'aidm-theme-preference';
        $meta_value = $theme_preference;

        update_user_meta( $user_id, $meta_key, $meta_value );
          
        return;
    }
}