<?php

class CHECKER_SHORTCODE extends SHEET_DATA_CHECKER_PRO {

    /**
	 * A reference to an instance of this class.
	 */
	private static $instance;

	/**
	 * Returns an instance of this class. 
	 */
	public static function get_instance() {

		return self::$instance;

	}

	/**
	 * Initializes the plugin by setting filters and administration functions.
	 */
	public function __construct() {

        // Load security class
        require_once SHEET_CHECKER_PRO_PATH . 'includes/class-Security.php';

        add_shortcode('checker', [$this, 'content'] );
        add_action( 'wp_enqueue_scripts', [$this, 'enqueue'] );

        add_action( 'wp_ajax_checker_public_validation', [$this, 'checker_public_validation'] );
        add_action( 'wp_ajax_nopriv_checker_public_validation', [$this, 'checker_public_validation'] );

        add_action( 'wp_ajax_checker_load_all_data', [$this, 'checker_load_all_data'] );
        add_action( 'wp_ajax_nopriv_checker_load_all_data', [$this, 'checker_load_all_data'] );

    }

    public function enqueue() {
        wp_enqueue_style( 'datatable', 'https://cdn.datatables.net/1.13.7/css/jquery.dataTables.min.css', [], 'all' );
        wp_enqueue_style( 'checker-pro', SHEET_CHECKER_PRO_URL . 'assets/public.css?ver='.SHEET_CHECKER_PRO_VERSION, [], 'all' );

        wp_enqueue_script( 'datatable', 'https://cdn.datatables.net/1.13.7/js/jquery.dataTables.min.js', ['jquery'], true );
        wp_enqueue_script( 'checker-pro', SHEET_CHECKER_PRO_URL . 'assets/public.js?ver='.SHEET_CHECKER_PRO_VERSION, ['jquery'], true );
    }

    public function content ($atts, $content=null) {

        if(!isset($atts['id'])){
            return;
        }

        $post_id = $atts['id'];
        $checker = get_post_meta( $post_id, 'checker', true );
        $checker = wp_parse_args( $checker, [
            'link' => '',
            'description' => '',
            'card'  => [
                'width' => 500,
                'background' => '#cccccc',
                'bg_opacity' => 50,
                'border_radius' => 1,
                'box_shadow' => '10px 5px 15px -5px',
                'box_shadow_color' => '#333333',
                'title' => '#333333',
                'title_align' => 'left',
                'description' => '#333333',
                'description_align' => 'left',
                'divider' => '#333333',
                'divider_width' => 1
            ],
            'field' => [
                'label' => 'block',
                'label-color' => '#333333'
            ],
            'fields' => [],
            'search_button' => [
                'text' => 'Search',
                'bg_color' => '#cccccc',
                'text_color' => '#333333',
                'position' => 'flex-end'
            ],
            'back_button' => [
                'text' => 'Back',
                'bg_color' => '#cccccc',
                'text_color' => '#333333',
                'position' => 'flex-start'
            ],
            'result' => [
                'display' => 'vertical-tabel',
                'header' => '#333333',
                'value' => '#333333',
                'columns' => [],
                'border_width' => 1
            ]
        ] );

        $url = $checker['link'];

        $link_format = substr($url, -3);

        // Set the delimiter based on the format
        $delimiter = $link_format == 'tsv' ? "\t" : ","; // Use tab for TSV, comma for CSV

        if (($handle = fopen($url, "r")) !== false) {
            $keys = fgetcsv($handle, 0, $delimiter); // Read the first row as keys
            while (($row = fgetcsv($handle, 0, $delimiter)) !== false) {
                $data[] = array_combine($keys, $row); // Combine keys with row values and add to the data array
            }
            fclose($handle);
        }
        $background_color = $checker['card']['background'];
        if($checker['card']['bg_opacity'] < 100){
            $background_color = $checker['card']['background'].''.$checker['card']['bg_opacity'];
        }
        
        $render = '';
        $render .= '<div class="dw-checker-container" id="checker-'.$post_id.'">';
        $render .= '<form class="dw-checker-wrapper dw-checker-form" 
                    style="max-width: 100%; 
                    background-color: '.$background_color.';
                    width: '.$checker['card']['width'].'px;
                    padding: '.$checker['card']['padding'].'em;
                    border-radius: '.$checker['card']['border_radius'].'em;
                    box-shadow: '.$checker['card']['box_shadow'].' '.$checker['card']['box_shadow_color'].';
                    ">';
        $render .= '<div class="dw-checker-title" 
                    style="color: '.$checker['card']['title'].';
                    text-align: '.$checker['card']['title_align'].';"
                    >'.get_the_title($post_id).'</div>';
        $render .= '<div class="dw-checker-description" 
                    style="color: '.$checker['card']['description'].'; 
                    text-align: '.$checker['card']['description_align'].';"
                    >'.$checker['description'].'</div>';
        
        $render .= '<hr class="dw-checker-divider" 
                    style="border-color: '.$checker['card']['divider'].';
                    border-width: '.$checker['card']['divider_width'].'px;">';

        $render .= '<div class="dw-checker-form-fields">';
        if(isset($checker['fields']) && !empty($checker['fields'])){
            foreach($checker['fields'] as $key => $field){
                if($field['type'] == 'text'){
                    $render .= '<div class="dw-checker-field">
                                    <label for="'.$key.'" style="color: '.$checker['field']['label-color'].';display: '.$checker['field']['label'].';">
                                        '.$field['label'].'
                                    </label>
                                    <input name="'.$key.'" placeholder="'.$field['placeholder'].'" class="dw-checker-inputs" data-kolom="'.$field['kolom'].'" required/>
                                </div>';
                }else{
                    $options = '';
                    $option_array = [];
                    foreach($data as $all_data){
                        foreach($all_data as $_key => $_value){
                            if($_key == $field['kolom'] && !in_array($_value, $option_array)){
                                $option_array[] = $_value;
                            }
                        }
                    }
                    asort($option_array);
                    if(!empty($option_array)){
                        foreach($option_array as $val){
                            $options .= '<option value="'.$val.'">'.$val.'</option>';
                        }
                    }
                    $render .= '<div class="dw-checker-field">
                                    <label for="'.$key.'" style="color: '.$checker['field']['label-color'].';display: '.$checker['field']['label'].';">
                                        '.$field['kolom'].'
                                    </label>
                                    <select name="'.$key.'" placeholder="'.$field['placeholder'].'" class="dw-checker-inputs" data-kolom="'.$field['kolom'].'" required>
                                        <option value="" disabled selected>-- '.$field['placeholder'].' --</option>
                                        '.$options.'
                                    </select>
                                </div>';
                }
            }
        }
        $render .= '</div>';
        
        $render .= '<hr class="dw-checker-divider" 
                    style="border-color: '.$checker['card']['divider'].';
                    border-width: '.$checker['card']['divider_width'].'px;">';

        $render .= '<div class="dw-checker-buttons dw-checker-form-button" style="justify-content: '.$checker['search_button']['position'].'">';
        $render .= '<button type="submit" data-checker="'.$post_id.'" class="search-button" 
                    data-btn-text="'.$checker['search_button']['text'].'"
                    style="background-color: '.$checker['search_button']['bg_color'].'; 
                    color: '.$checker['search_button']['text_color'].';">
                        '.$checker['search_button']['text'].'
                    </button>';
        $render .= '</div>';

        $render .= '</form>';

        $render .= '<div class="dw-checker-wrapper dw-checker-result"
                    style="display:none; max-width: 100%; 
                    background-color: '.$checker['card']['background'].';
                    width: '.$checker['card']['width'].'px;
                    padding: '.$checker['card']['padding'].'em;
                    border-radius: '.$checker['card']['border_radius'].'em;
                    box-shadow: '.$checker['card']['box_shadow'].' '.$checker['card']['box_shadow_color'].';
                    ">';
        $render .= '<div class="dw-checker-title"
                    style="color: '.$checker['card']['title'].';
                    text-align: '.$checker['card']['title_align'].';"
                    ></div>';
        $render .= '<div class="dw-checker-description"
                    style="color: '.$checker['card']['description'].'; 
                    text-align: '.$checker['card']['description_align'].';"
                    ></div>';
        
        $render .= '<hr class="dw-checker-divider" 
                    style="border-color: '.$checker['card']['divider'].';
                    border-width: '.$checker['card']['divider_width'].'px;">';

        $render .= '<div class="dw-checker-results"></div>';
        
        $render .= '<hr class="dw-checker-divider" 
                    style="border-color: '.$checker['card']['divider'].';
                    border-width: '.$checker['card']['divider_width'].'px;">';

        $render .= '<div class="dw-checker-buttons dw-checker-result-button" style="justify-content: '.$checker['back_button']['position'].'">';
        $render .= '<button type="button" class="back-button" data-checker='.$post_id.'
                    style="background-color: '.$checker['back_button']['bg_color'].'; 
                    color: '.$checker['back_button']['text_color'].';">
                        '.$checker['back_button']['text'].'
                    </button>';
        $render .= '</div>';

        $render .= '</div>';
        $render .= '</div>';
        $render .= '<div class="dw-checker-bottom-results"></div>';
        
        // Pass settings to frontend as data attributes
        $render .= '<script type="application/json" id="checker-settings-'.$post_id.'" class="checker-settings-data">';
        $render .= json_encode([
            'checker_id' => $post_id,
            'initial_display' => $checker['result']['initial_display'] ?? 'hidden',
            'filter_mode' => $checker['result']['filter_mode'] ?? 'search',
            'max_records' => $checker['result']['max_records'] ?? 100,
            'url_params_enabled' => $checker['url_params']['enabled'] ?? 'no',
            'url_params_auto_search' => $checker['url_params']['auto_search'] ?? 'no'
        ]);
        $render .= '</script>';

        return $render;

    }

    public function checker_public_validation() {

        $post_id = $_REQUEST['checker_id'];
        $checker = get_post_meta( $post_id, 'checker', true );

        // Security checks
        $ip = CHECKER_SECURITY::get_client_ip();
        
        // Check rate limit
        $rate_limit = CHECKER_SECURITY::check_rate_limit($post_id, $ip);
        if (!$rate_limit['allowed']) {
            wp_send_json_error([
                'message' => $rate_limit['message'],
                'type' => 'rate_limit'
            ]);
            return;
        }
        
        // Check reCAPTCHA if enabled
        if (isset($_REQUEST['recaptcha_token'])) {
            $recaptcha = CHECKER_SECURITY::verify_recaptcha($post_id, $_REQUEST['recaptcha_token']);
            if (!$recaptcha['success']) {
                wp_send_json_error([
                    'message' => $recaptcha['message'],
                    'type' => 'recaptcha'
                ]);
                return;
            }
        }
        
        // Check Turnstile if enabled
        if (isset($_REQUEST['turnstile_token'])) {
            $turnstile = CHECKER_SECURITY::verify_turnstile($post_id, $_REQUEST['turnstile_token']);
            if (!$turnstile['success']) {
                wp_send_json_error([
                    'message' => $turnstile['message'],
                    'type' => 'turnstile'
                ]);
                return;
            }
        }

        $url = $checker['link'];
        
        $link_format = substr($url, -3);

        // Set the delimiter based on the format
        $delimiter = $link_format == 'tsv' ? "\t" : ","; // Use tab for TSV, comma for CSV

        if (($handle = fopen($url, "r")) !== false) {
            $keys = fgetcsv($handle, 0, $delimiter); // Read the first row as keys
            while (($row = fgetcsv($handle, 0, $delimiter)) !== false) {
                $data[] = array_combine($keys, $row); // Combine keys with row values and add to the data array
            }
            fclose($handle);
        }

        $validator = $_REQUEST['validate'];
        $validation = [];
        foreach($validator as $validate){
            $validation[$validate['kolom']] = $validate['value'];
        }
        $validator_count = count($validator);
        $result = [];
        if(!empty($data)){
            foreach($data as $row){
                $valid = [];
                foreach($row as $header => $value){
                    $id = '_'.strtolower(str_replace(' ', '_', $header));
                    $include = false;
                    if(isset($validation[$header])){
                        if($checker['fields'][$id]['match'] == 'match' && strtolower($value) == strtolower($validation[$header])){
                            $include = true;
                        }
                        if($checker['fields'][$id]['match'] == 'contain' && false !== strpos(strtolower($value), strtolower($validation[$header]))){
                            $include = true;
                        }
                        if($include){
                            $valid[$header] = $value;
                        }
                    }
                }
                if($validator_count !== count($valid)){
                    continue;
                }
                $result[] = $row;
            }
        }

        $send = [
            'count' => count($result),
            'rows' => $result,
            'settings' => $checker['result'],
            'output' => $checker['output']
        ];

        wp_send_json($send);

    }

    /**
     * Load all data from sheet (for show all mode)
     */
    public function checker_load_all_data() {
        $post_id = isset($_REQUEST['checker_id']) ? intval($_REQUEST['checker_id']) : 0;
        $limit = isset($_REQUEST['limit']) ? intval($_REQUEST['limit']) : 100;
        
        if (!$post_id) {
            wp_send_json_error(['message' => 'Invalid checker ID']);
            return;
        }
        
        $checker = get_post_meta($post_id, 'checker', true);
        
        if (!$checker || !isset($checker['link'])) {
            wp_send_json_error(['message' => 'Checker not found']);
            return;
        }
        
        // Security check - rate limiting only
        $ip = CHECKER_SECURITY::get_client_ip();
        $rate_limit = CHECKER_SECURITY::check_rate_limit($post_id, $ip);
        if (!$rate_limit['allowed']) {
            wp_send_json_error([
                'message' => $rate_limit['message'],
                'type' => 'rate_limit'
            ]);
            return;
        }
        
        $url = $checker['link'];
        $link_format = substr($url, -3);
        $delimiter = $link_format == 'tsv' ? "\t" : ",";
        
        $data = [];
        $handle = fopen($url, "r");
        
        if ($handle !== false) {
            $keys = fgetcsv($handle, 0, $delimiter);
            $count = 0;
            
            while (($row = fgetcsv($handle, 0, $delimiter)) !== false && $count < $limit) {
                if (count($keys) === count($row)) {
                    $data[] = array_combine($keys, $row);
                    $count++;
                }
            }
            fclose($handle);
        }
        
        wp_send_json([
            'count' => count($data),
            'rows' => $data,
            'settings' => $checker['result'],
            'output' => $checker['output'],
            'url_params' => $checker['url_params'] ?? [],
            'filter_mode' => $checker['result']['filter_mode'] ?? 'search'
        ]);
    }

}