<?php
/**
 * Blog Material functions and definitions
 *
 * Set up the theme and provides some helper functions, which are used in the
 * theme as custom template tags. Others are attached to action and filter
 * hooks in WordPress to change core functionality.
 *
 * @package WordPress
 * @subpackage blog-material
 * @since Blog Material 1.0
 */

add_action('after_setup_theme', 'blog_material_setup');
if (!function_exists('blog_material_setup')):
    /**
     * Sets up theme defaults and registers support for various WordPress features.
     *
     * Note that this function is hooked into the after_setup_theme hook, which
     * runs before the init hook. The init hook is too late for some features, such
     * as indicating support for post thumbnails.
     *
     * Create your own blog_material_setup() function to override in a child theme.
     *
     * @since Blog Material 1.0
     */
    function blog_material_setup()
    {
        // Make theme available for translation.
        load_theme_textdomain('blog-material');

        // Add default posts and comments RSS feed links to head.
        add_theme_support('automatic-feed-links');

        // Let WordPress manage the document title.
        add_theme_support('title-tag');

        // Enable support for custom logo.
        add_theme_support('custom-logo', [
            'height' => 128,
            'width' => 128,
            'flex-height' => true,
            'header-text' => ['site-title'],
        ]);

        add_theme_support('custom-background', [
            'default-color' => '#ffffff',
            'default-image' => get_template_directory_uri() . '/images/bg.jpg',
            'default-repeat' => 'no-repeat',
            'default-position-x' => 'center',
            'default-attachment' => 'fixed',
        ]);

        // Enable support for Post Thumbnails on posts and pages.
        add_theme_support('post-thumbnails');
        set_post_thumbnail_size(1200, 9999);

        // This theme uses wp_nav_menu() in two locations.
        register_nav_menus([
            'primary' => __('Primary Menu', 'blog-material'),
            'social' => __('Social Links Menu', 'blog-material'),
        ]);

        // Switch default core markup for search form, comment form, and comments to output valid HTML5.
        add_theme_support('html5', [
            'search-form',
            'comment-form',
            'comment-list',
            'gallery',
            'caption',
        ]);

        $GLOBALS['content_width'] = 852;

        // Indicate widget sidebars can use selective refresh in the Customizer.
        add_theme_support('customize-selective-refresh-widgets');
    }
endif;

/**
 * Return available primary and accent colors.
 *
 * @param string $type
 * @return array
 */
function blog_material_get_colors($type = 'primary')
{
    $colors = [
        "Deep Orange" => "#ff5722",
        "Red" => "#f44336",
        "Pink" => "#e91e63",
        "Purple" => "#9c27b0",
        "Deep Purple" => "#673ab7",
        "Indigo" => "#3f51b5",
        "Blue" => "#2196f3",
        "Light Blue" => "#03a9f4",
        "Cyan" => "#00bcd4",
        "Teal" => "#009688",
        "Green" => "#4caf50",
        "Light Green" => "#8bc34a",
        "Lime" => "#cddc39",
        "Yellow" => "#ffeb3b",
        "Amber" => "#ffc107",
        "Orange" => "#ff9800",
    ];
    if ($type !== 'accent') {
        $colors['Brown'] = '#795548';
        $colors['Blue Grey'] = '#607d8b';
        $colors['Grey'] = '#9e9e9e';
    }

    return $colors;
}

add_action('customize_register', 'blog_material_customize_register');
/**
 * Adds postMessage support for site title and description for the Customizer.
 *
 * @since Blog Material 1.0
 *
 * @param WP_Customize_Manager $wp_customize The Customizer object.
 */
function blog_material_customize_register($wp_customize)
{
    // Add header transparency setting and control.
    $wp_customize->add_setting('header_transparency', [
        'default' => '0',
        'transport' => 'postMessage',
        'sanitize_callback' => 'sanitize_key',
    ]);
    $wp_customize->add_control('header_transparency', [
        'label' => __('Transparent Header', 'blog-material'),
        'section' => 'colors',
        'type' => 'checkbox',
    ]);

    // Add header text color setting and control.
    $wp_customize->add_setting('header_text_color', [
        'default' => '#ffffff',
        'transport' => 'postMessage',
        'sanitize_callback' => 'sanitize_hex_color',
    ]);
    $wp_customize->add_control(
        new WP_Customize_Color_Control($wp_customize, 'header_text_color', [
            'label' => __('Header Text Color', 'blog-material'),
            'section' => 'colors'
        ])
    );

    function validate_same_colors($validity, $value)
    {
        $colors = explode('-', strtolower($value));
        if (empty($value) || $colors[0] === $colors[1]) {
            $validity->add('same_colors', __('Colors cannot be the same.', 'blog-material'));
        }
        return $validity;
    }

    // Add color scheme setting and control.
    require_once('classes/blog-material-custom-color-scheme-control.php');
    $wp_customize->add_setting('color_scheme', [
        'default' => 'Indigo-Pink',
        'transport' => 'postMessage',
        'validate_callback' => 'validate_same_colors',
        'sanitize_callback' => 'sanitize_text_field',
    ]);
    $wp_customize->add_control(
        new Blog_Material_Custom_Color_Scheme_Control($wp_customize, 'color_scheme', [
            'section' => 'colors',
        ])
    );

    // Add footer copyright text setting and control.
    $wp_customize->add_setting('footer_copy', [
        'default' => '© Laurynas Baltrenas, 2016',
        'transport' => 'postMessage',
        'sanitize_callback' => 'sanitize_text_field',
    ]);
    $wp_customize->add_control('footer_copy', [
        'label' => __('Footer Copyright', 'blog-material'),
        'section' => 'title_tagline',
        'type' => 'text',
    ]);
}

add_action('customize_save_after', 'blog_material_fetch_css');
/**
 * Enqueues scripts and styles.
 *
 * @since Blog Material 1.0
 */
function blog_material_fetch_css()
{
    /** @global $wp_filesystem WP_Filesystem_Base */
    global $wp_filesystem;
    if (empty($wp_filesystem)) {
        WP_Filesystem();
    }

    $scheme = str_replace(' ', '_', strtolower(get_theme_mod('color_scheme')));
    $url = "https://code.getmdl.io/1.2.1/material.$scheme.min.css";

    $wp_filesystem->put_contents(
        get_template_directory() . '/css/material.css',
        wp_remote_get($url)['body']
    );
}

add_action('customize_preview_init', 'blog_material_customize_preview');
/**
 * Enqueues theme customization scripts.
 *
 * @since Blog Material 1.0
 */
function blog_material_customize_preview()
{
    wp_enqueue_script(
        'blog-material-theme-customizer',
        get_template_directory_uri() . '/js/theme-customizer.js',
        ['customize-preview'], '', true
    );
}

add_action('widgets_init', 'blog_material_widgets_init');
/**
 * Registers a widget area.
 *
 * @since Blog Material 1.0
 */
function blog_material_widgets_init()
{
    register_sidebar([
        'name' => __('Sidebar', 'blog-material'),
        'id' => 'sidebar-1',
        'description' => __('Add widgets here to appear in your drawer.', 'blog-material'),
        'before_widget' => '<section id="%1$s" class="widget %2$s">',
        'after_widget' => '</section>',
        'before_title' => '<h2 class="widget-title">',
        'after_title' => '</h2>',
    ]);
}

if (!function_exists('blog_material_fonts_url')):
    /**
     * Register Google fonts for Twenty Sixteen.
     *
     * Create your own blog_material_fonts_url() function to override in a child theme.
     *
     * @since Blog Material 1.0
     *
     * @return string Google fonts URL for the theme.
     */
    function blog_material_fonts_url()
    {
        $fonts_url = '';
        $fonts = [];
        $subsets = 'latin,latin-ext';

        $fonts[] = 'Roboto:regular,bold,italic,thin,light,bolditalic,black,medium';
        $fonts[] = 'Material Icons';

        if ($fonts) {
            $fonts_url = add_query_arg([
                'family' => urlencode(implode('|', $fonts)),
                'subset' => urlencode($subsets),
            ], 'https://fonts.googleapis.com/css');
        }

        return $fonts_url;
    }
endif;

add_action('wp_enqueue_scripts', 'blog_material_scripts');
/**
 * Enqueues scripts and styles.
 *
 * @since Blog Material 1.0
 */
function blog_material_scripts()
{
    // Add custom fonts, used in the main stylesheet.
    wp_enqueue_style('blog-material-fonts', blog_material_fonts_url(), [], null);

    // Theme stylesheet.
    wp_enqueue_style('blog-material-mdl-style', get_template_directory_uri() . '/css/material.css', [], time());
    wp_enqueue_style('blog-material-style', get_stylesheet_uri());

    // Load the html5 shiv.
    wp_enqueue_script('blog-material-html5', get_template_directory_uri() . '/js/html5.js', [], '3.7.3');
    wp_script_add_data('blog-material-html5', 'conditional', 'lt IE 9');

    if (is_singular() && comments_open() && get_option('thread_comments')) {
        wp_enqueue_script('comment-reply');
    }

    wp_enqueue_script('blog-material-mdl-script', get_template_directory_uri() . '/js/material.js', [], '1.2.1', true);
    wp_enqueue_script('blog-material-script', get_template_directory_uri() . '/js/script.js', [], '1.0.0', true);
}

add_theme_support('admin-bar', ['callback' => 'blog_material_admin_bar_bump']);
/**
 * Fixes page layout when admin bar is shown
 *
 * @since Blog Material 1.0
 */
function blog_material_admin_bar_bump()
{ ?>
    <style type="text/css" media="screen">
        .mdl-layout__container {
            padding-top: 32px;
            box-sizing: border-box;
        }

        @media screen and ( max-width: 782px ) {
            .mdl-layout__container {
                padding-top: 46px;
                box-sizing: border-box;
            }
        }
    </style>
    <?php
}

add_filter('comment_form_defaults', 'blog_material_comment_form_defaults');
/**
 * Custom comment form default values
 *
 * @since Blog Material 1.0
 */
function blog_material_comment_form_defaults($defaults)
{
    $commenter = wp_get_current_commenter();
    $req = get_option('require_name_email');
    $html_req = $req ? "required='required'" : '';
    return wp_parse_args([
        'title_reply' => '',
        'title_reply_to' => '',
        'title_reply_before' => '',
        'title_reply_after' => '',
        'comment_notes_before' => '<p class="comment-notes">' . __('Your email address will not be published.', 'blog-material') . '</p>',
        'comment_field' => '<div class="comment-form__fields"><div class="comment-form__inputs mdl-grid"><div class="mdl-textfield mdl-textfield--floating-label mdl-js-textfield mdl-cell mdl-cell--12-col"><textarea id="comment" name="comment" class="mdl-textfield__input" rows="1" maxlength="65525"></textarea><label for="comment" class="mdl-textfield__label">Join the discussion</label></div>',
        'fields' => [
            'author' => '<div class="mdl-textfield mdl-textfield--floating-label mdl-js-textfield mdl-cell mdl-cell--6-col"><input id="author" name="author" type="text" class="mdl-textfield__input" value="' . esc_attr($commenter['comment_author']) . '" maxlength="245" ' . $html_req . '/><label for="author" class="mdl-textfield__label">' . __('Name', 'blog-material') . '</label></div>',
            'email' => '<div class="mdl-textfield mdl-textfield--floating-label mdl-js-textfield mdl-cell mdl-cell--6-col"><input id="email" name="email" type="email" class="mdl-textfield__input" value="' . esc_attr($commenter['comment_author_email']) . '" maxlength="100" ' . $html_req . '/><label for="email" class="mdl-textfield__label">' . __('Email', 'blog-material') . '</label></div>',
        ],
        'submit_field' => '%1$s %2$s',
        'submit_button' => '</div><button name="%1$s" id="%2$s" class="%3$s mdl-button mdl-button--icon mdl-button--colored mdl-button--fab mdl-js-button mdl-js-ripple-effect" type="submit"><i class="material-icons">%4$s</i></button></div>',
        'label_submit' => 'check',
    ], $defaults);
}

add_filter('navigation_markup_template', 'blog_material_navigation_template');
/**
 * Custom navigation template using required mdl classes
 *
 * @since Blog Material 1.0
 */
function blog_material_navigation_template($template)
{
    return '<nav class="navigation %1$s mdl-color-text--grey-50 mdl-cell mdl-cell--12-col">%2$s %3$s</nav>';
}

add_filter('next_post_link', 'blog_material_next_post_link');
/**
 * Adds section spacer before next post link
 *
 * @since Blog Material 1.0
 */
function blog_material_next_post_link($output)
{
    return '<div class="section-spacer"></div>' . $output;
}