<?php

/**
 * Abstract Base widget class that can be used to create widgets
 *
 * @author   Avenews
 * @category Widgets
 *
 * @since 1.0.0
 *
 * @extends  WP_Widget
 */
abstract class Avenews_Widget_Base extends WP_Widget
{

    /**
     * CSS class.
     *
     * @var string
     */
    public $widget_cssclass;

    /**
     * Widget description.
     *
     * @var string
     */
    public $widget_description;

    /**
     * Widget ID.
     *
     * @var string
     */
    public $widget_id;

    /**
     * Widget name.
     *
     * @var string
     */
    public $widget_name;

    /**
     * Settings.
     *
     * @var array
     */
    public $settings;

    /**
     * Attributes.
     *
     * @var array
     */
    public $attrs;

    /**
     * Constructor.
     */
    public function __construct()
    {

        $widget_ops = array(
            'classname' => $this->widget_cssclass,
            'description' => $this->widget_description,
            'customize_selective_refresh' => true,
        );

        $this->attrs = apply_filters(
            'avenews_widget_base_attr_arr',
            array(
                'type' => 'text',
                'class' => '',
                'wrapper_class' => '',
                'label' => '',
                'css' => '',
                'std' => '',
                'min' => 1,
                'max' => 10,
                'step' => 1,
                'rows' => 4,
                'placeholder' => '',
                'options' => '',
                'desc' => '',
                'separator' => false,
                'readonly' => false,
                'args' => array(),
            )
        );

        parent::__construct($this->widget_id, $this->widget_name, $widget_ops);

        /*Load Require Styles and scripts*/
        add_action('admin_enqueue_scripts', array($this, 'avenews_widget_scripts'));

    }

    /**
     * Output the html at the start of a widget.
     *
     * @param array $args
     * @param array $instance
     */
    public function widget_start($args, $instance)
    {
        echo $args['before_widget'];

        if ($title = apply_filters('widget_title', empty($instance['title']) ? '' : $instance['title'], $instance, $this->id_base)) {
            echo $args['before_title'] . $title . $args['after_title'];
        }
    }

    /**
     * Output the html at the end of a widget.
     *
     * @param array $args
     */
    public function widget_end($args)
    {
        echo $args['after_widget'];
    }


    /**
     * Updates a particular instance of a widget.
     *
     * @param array $new_instance
     * @param array $old_instance
     * @return array
     * @see    WP_Widget->update
     */
    public function update($new_instance, $old_instance)
    {
        $instance = $old_instance;
        if (empty($this->settings)) {
            return $instance;
        }

        // Loop settings and get values to save.
        foreach ($this->settings as $key => $setting) {
            if (!isset($setting['type'])) {
                continue;
            }

            switch ($setting['type']) {
                case 'text':
                    $instance[$key] = sanitize_text_field($new_instance[$key]);
                    break;
                case 'url':
                    $instance[$key] = esc_url_raw($new_instance[$key]);
                    break;
                case 'email':
                    $instance[$key] = sanitize_email($new_instance[$key]);
                    break;
                case 'number':
                    $instance[$key] = absint($new_instance[$key]);
                    if (isset($setting['min']) && '' !== $setting['min']) {
                        $instance[$key] = max($instance[$key], $setting['min']);
                    }
                    if (isset($setting['max']) && '' !== $setting['max']) {
                        $instance[$key] = min($instance[$key], $setting['max']);
                    }
                    break;
                case 'checkbox':
                    $instance[$key] = empty($new_instance[$key]) ? 0 : 1;
                    break;
                case 'select':
                case 'radio':
                    $input = $new_instance[$key];
                    $choices = $setting['options'];
                    $instance[$key] = array_key_exists($input, $choices) ? $input : $setting['std'];
                    break;
                case 'textarea':
                    $instance[$key] = wp_kses(trim(wp_unslash($new_instance[$key])), wp_kses_allowed_html('post'));
                    break;
                case 'color':
                    $instance[$key] = sanitize_hex_color($new_instance[$key]);
                    break;
                case 'image':
                    $instance[$key] = absint($new_instance[$key]);
                    break;
                case 'dropdown-pages':
                    $page_id = absint($new_instance[$key]);
                    $instance[$key] = ('page' === get_post_type($page_id) && 'publish' === get_post_status($page_id)) ? $page_id : $setting['std'];
                    break;
                case 'dropdown-taxonomies':
                    $instance[$key] = (-1 === $new_instance[$key]) ? -1 : absint($new_instance[$key]);
                    break;
                case 'multi-select':
                    $output = array();
                    $input = $new_instance[$key];
                    $choices = $setting['options'];
                    foreach ($input as $k => $v) {
                        if (array_key_exists($v, $choices)) {
                            $output[] = $v;
                        }
                    }
                    $instance[$key] = $output;
                    break;
                case 'multi-checkbox':
                    $output = array();
                    $input = $new_instance[$key];
                    $choices = $setting['options'];
                    foreach ($input as $k => $v) {
                        if (array_key_exists($v, $choices)) {
                            $output[] = $v;
                        }
                    }
                    $instance[$key] = $output;
                    break;
                default:
                    $instance[$key] = sanitize_text_field($new_instance[$key]);
                    break;
            }

            /**
             * Sanitize the value of a setting.
             */
            $instance[$key] = apply_filters('avenews_widget_settings_sanitize', $instance[$key], $new_instance, $key, $setting);
        }

        return $instance;
    }

    /**
     * Output the Back-end widget form.
     *
     * @param array $instance Current settings.
     *
     * @return void
     */
    public function form($instance)
    {

        if (empty($this->settings)) {
            return;
        }

        foreach ($this->settings as $key => $setting) {
            $attr = array_merge($this->attrs, $setting);
            $value = isset($instance[$key]) ? $instance[$key] : $attr['std'];

            $desc = $separator = '';
            if ($attr['desc']) {
                $desc = '<span style="clear:both;display:block;"><em>' . esc_html($attr['desc']) . '</em></span>';
            }
            if ($attr['separator']) {
                $separator = '<hr style="border:1px #CCC solid;"/>';
            }

            switch ($setting['type']) {
                case 'text':
                case 'url':
                case 'email':
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <p>
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                            <span class="field-label">
                                <?php echo esc_html($attr['label']); ?>
                            </span>
                            </label>
                            <input
                                    class="widefat <?php echo esc_attr($attr['class']); ?>"
                                    id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                                    name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                                    type="<?php echo esc_attr($setting['type']); ?>"
                                    value="<?php echo esc_attr($value); ?>"
                                    style="<?php echo esc_attr($attr['css']); ?>"
                                    placeholder="<?php echo esc_attr($attr['placeholder']); ?>"
                                <?php echo (true === $attr['readonly']) ? ' readonly ' : ''; ?>
                            />
                        </p>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'number':
                    $value = $value ? absint($value) : absint($attr['min']);
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <p>
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                                <span class="field-label">
                                    <?php echo esc_html($attr['label']); ?>
                                </span>
                            </label>
                            <input
                                    type="number"
                                    id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                                    name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                                    value="<?php echo esc_attr($value); ?>"
                                    class="widefat <?php echo esc_attr($attr['class']); ?>"
                                    style="<?php echo esc_attr($attr['css']); ?>"
                                    min="<?php echo esc_attr($attr['min']); ?>"
                                    max="<?php echo esc_attr($attr['max']); ?>"
                                    step="<?php echo esc_attr($attr['step']); ?>"
                                <?php echo (true === $attr['readonly']) ? ' readonly ' : ''; ?>
                            />
                        </p>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'checkbox':
                    $value = $value ? (bool)$value : false;
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <p>
                            <input type="checkbox"
                                   class="checkbox <?php echo esc_attr($attr['class']); ?>"
                                   id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                                   name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                                   value="1"
                                <?php checked($value, 1); ?>
                                <?php echo (true === $attr['readonly']) ? ' disabled="disabled"  ' : ''; ?>
                            />
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                                <span class="field-label">
                                    <?php echo esc_html($attr['label']); ?>
                                </span>
                            </label>
                        </p>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'radio':
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <p>
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                                <span class="field-label">
                                    <?php echo esc_html($attr['label']); ?>
                                </span>
                            </label><br/>
                            <?php if (!empty($attr['options'])) : ?>
                                <?php foreach ($attr['options'] as $k => $v) : ?>
                                    <label for="<?php echo esc_attr($this->get_field_id($key) . '-' . $k); ?>">
                                        <input type="radio" name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                                               id="<?php echo esc_attr($this->get_field_id($key) . '-' . $k); ?>"
                                               value="<?php echo esc_attr($k); ?>" <?php checked($k, $value); ?> <?php echo (true === $attr['readonly']) ? ' disabled="disabled"  ' : ''; ?>/>
                                        <?php echo esc_html($v); ?>
                                    </label>&nbsp;&nbsp;
                                <?php endforeach; ?>
                            <?php endif ?>
                        </p>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'select':
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <p>
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                                <span class="field-label">
                                    <?php echo esc_html($attr['label']); ?>
                                </span>
                            </label>
                            <select
                                    id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                                    name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                                    class="widefat <?php echo esc_attr($attr['class']); ?>"
                                    style="<?php echo esc_attr($attr['css']); ?>"
                                <?php echo (true === $attr['readonly']) ? ' disabled ' : ''; ?>
                            >
                                <?php if (!empty($attr['options'])) : ?>
                                    <?php foreach ($attr['options'] as $option_key => $label) : ?>
                                        <option value="<?php echo esc_attr($option_key); ?>" <?php selected($option_key, $value); ?>><?php echo esc_html($label); ?></option>
                                    <?php endforeach; ?>
                                <?php endif; ?>
                            </select>
                        </p>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'textarea':
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <p>
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                                <span class="field-label">
                                    <?php echo esc_html($attr['label']); ?>
                                </span>
                            </label><br/>
                            <textarea
                                    rows="<?php echo absint($attr['rows']); ?>"
                                    id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                                    name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                                    class="widefat <?php echo esc_attr($attr['class']); ?>"
                                    style="<?php echo esc_attr($attr['css']); ?>"
                                    placeholder="<?php echo esc_attr($attr['placeholder']); ?>"
                                <?php echo (true === $attr['readonly']) ? ' readonly ' : ''; ?>
                            ><?php echo esc_textarea($value); ?></textarea>
                        </p>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'color':
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <p>
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                                <span class="field-label"><?php echo esc_html($attr['label']); ?></span>
                            </label><br/>
                            <input
                                    type="text"
                                    id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                                    name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                                    value="<?php echo esc_attr($value); ?>"
                                    class="color-picker <?php echo esc_attr($attr['class']); ?>"
                                <?php echo (isset($attr['std'])) ? ' data-default-color="' . esc_attr($attr['std']) . '" ' : ''; ?>
                            />
                        </p>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'image':
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <div class="<?php echo esc_attr($attr['class']); ?>"
                             style="<?php echo esc_attr($attr['css']); ?>">
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                                <span class="field-label"><?php echo esc_html($attr['label']); ?></span>
                            </label><br/>
                            <?php $remove_button_style = ($value) ? 'display:inline-block' : 'display:none;'; ?>
                            <div class="image-field">
                                <div class="image-preview">
                                    <?php
                                    if (!empty($value)) {
                                        $image_attributes = wp_get_attachment_image_src($value);
                                        if ($image_attributes) {
                                            ?>
                                            <img src="<?php echo esc_url($image_attributes[0]); ?>"/>
                                            <?php
                                        }
                                    }
                                    ?>
                                </div>
                                <p>
                                    <input type="hidden" class="img"
                                           name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                                           id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                                           value="<?php echo esc_attr($value); ?>"/>
                                    <button type="button" class="upload_image_button button"
                                            data-uploader-title-txt="<?php esc_attr_e('Use Image', 'avenews'); ?>"
                                            data-uploader-btn-txt="<?php esc_attr_e('Choose an Image', 'avenews'); ?>">
                                        <?php esc_html_e('Upload/Add image', 'avenews'); ?>
                                    </button>
                                    <button type="button" class="remove_image_button button"
                                            style="<?php echo esc_attr($remove_button_style); ?>"><?php esc_html_e('Remove image', 'avenews'); ?></button>
                                </p>
                            </div>
                        </div>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'heading':
                    $css = 'text-align:center;background-color:#f1f1f1;padding:5px 0;margin-top:5px;';
                    if (!empty($attr['css'])) {
                        $css = $attr['css'];
                    }
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <h4 class="widefat <?php echo esc_attr($attr['class']); ?>"
                            style="<?php echo esc_attr($css); ?>">
                            <span class="field-label"><strong><?php echo esc_html($attr['label']); ?></strong></span>
                        </h4>
                        <?php echo wp_kses_post($separator); ?>
                    </div>
                    <?php
                    break;

                case 'subtitle':
                    $css = 'padding:10px 0;color:#797b7d;';
                    if (!empty($attr['css'])) {
                        $css = $attr['css'];
                    }
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <span class="widefat <?php echo esc_attr($attr['class']); ?>"
                              style="<?php echo esc_attr($css); ?>">
                            <em><?php echo '( ' . esc_html($attr['label']) . ' )'; ?></em>
                        </span>
                        <?php echo wp_kses_post($separator); ?>
                    </div>
                    <?php
                    break;

                case 'message':
                    $css = 'padding:10px 0;';
                    if (!empty($attr['css'])) {
                        $css = $attr['css'];
                    }
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <div class="widefat field-message uf-custom-field-message <?php echo esc_attr($attr['class']); ?>"
                             style="<?php echo esc_attr($css); ?>">
                            <?php echo wp_kses_data($attr['label']); ?>
                        </div>
                        <?php echo wp_kses_post($separator); ?>
                    </div>
                    <?php
                    break;

                case 'dropdown-taxonomies':
                    $args = $attr['args'];
                    $args['selected'] = esc_attr($value);
                    $args['name'] = esc_attr($this->get_field_name($key));
                    $args['id'] = esc_attr($this->get_field_id($key));
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <p>
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                                <span class="field-label"><?php echo esc_html($attr['label']); ?></span>
                            </label>
                            <?php wp_dropdown_categories($args); ?>
                        </p>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'dropdown-pages':
                    $args = $attr['args'];
                    $args['selected'] = esc_attr($value);
                    $args['name'] = esc_attr($this->get_field_name($key));
                    $args['id'] = esc_attr($this->get_field_id($key));
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <p>
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                                <span class="field-label"><?php echo esc_html($attr['label']); ?></span>
                            </label>
                            <?php wp_dropdown_pages($args); ?>
                        </p>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'multi-select':
                    if (empty($value)) {
                        $value = array();
                    }
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <p>
                            <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                                <span class="field-label">
                                    <?php echo esc_html($attr['label']); ?>
                                </span>
                            </label>
                            <?php if (!empty($attr['options'])) : ?>
                                <select multiple
                                        id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                                        name="<?php echo esc_attr($this->get_field_name($key)); ?>[]"
                                        class="widefat <?php echo esc_attr($attr['class']); ?>"
                                        style="<?php echo esc_attr($attr['css']); ?>"
                                    <?php echo (true === $attr['readonly']) ? ' disabled ' : ''; ?>
                                >
                                    <?php
                                    foreach ($attr['options'] as $option_key => $label) :
                                        $isSelected = in_array($option_key, $value) ? "selected='selected'" : '';
                                        ?>
                                        <option value="<?php echo esc_attr($option_key); ?>" <?php echo esc_html($isSelected); ?>><?php echo esc_html($label); ?></option>
                                    <?php endforeach; ?>
                                </select>
                            <?php endif; ?>
                        </p>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                case 'multi-checkbox':
                    if (empty($value)) {
                        $value = array();
                    }
                    ?>
                    <div class="<?php echo esc_attr($attr['wrapper_class']); ?>">
                        <span><?php echo esc_html($attr['label']); ?></span>
                        <?php if (!empty($attr['options'])) : ?>
                            <ul>
                                <?php
                                $i = 1;
                                foreach ($attr['options'] as $option_key => $label) {
                                    $id = $this->get_field_id($key) . '-' . $i;
                                    $isChecked = in_array($option_key, $value) ? "checked='checked'" : '';
                                    ?>
                                    <li>
                                        <label for="<?php echo esc_attr($id); ?>">
                                            <input type="checkbox"
                                                   class="checkbox <?php echo esc_attr($attr['class']); ?>"
                                                   id="<?php echo esc_attr($id); ?>"
                                                   name="<?php echo esc_attr($this->get_field_name($key)); ?>[]"
                                                   value="<?php echo esc_attr($option_key); ?>"
                                                <?php echo esc_html($isChecked); ?>
                                            />
                                            <?php echo esc_html($label); ?>
                                        </label>
                                    </li>
                                    <?php
                                    $i++;
                                }
                                ?>
                            </ul>
                        <?php endif; ?>
                        <?php
                        echo wp_kses_post($desc);
                        echo wp_kses_post($separator);
                        ?>
                    </div>
                    <?php
                    break;

                default:
                    do_action('avenews_widget_field_' . $setting['type'], $key, $value, $setting, $instance);
                    break;
            }
        }
    }

    /**
     * Enqueues necessary css and js files
     *
     * @param string $hook
     * @return void
     */
    public function avenews_widget_scripts($hook)
    {
        wp_enqueue_style('wp-color-picker');
        wp_enqueue_media();
        wp_enqueue_script( 'wp-color-picker' );
        if ('widgets.php' === $hook) {

            wp_enqueue_style('avenews_widgets_css', get_template_directory_uri() . '/inc/widgets/widget-base/css/style.css');
        }
        wp_enqueue_script('avenews_widgets_js', get_template_directory_uri() . '/inc/widgets/widget-base/js/script.js', array('jquery', 'wp-color-picker'), '1.0.0', true);

    }

}