<?php
/**
 * Bulk options template.
 *
 * @since 1.0
 */
// don't load directly
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}
// phpcs:ignore WordPress.WP.GlobalVariablesOverride
global $ws4agpt_admin; // Get the global instance of WS4AGPT_Admin
$ws4agpt = $ws4agpt_admin; // Use the global instance

// Initialize form data with defaults
$form_data = [
    'is_image'   => '',
    'density'    => 1,
    'length'     => 1000,
    'is_wp_post' => '',
];

// Process POST data when nonce is verified
if ( isset( $_POST['bulk-form-submit'] ) ) {
    if ( check_admin_referer( 'ws4agpt-bulk-options-form' ) ) {
        // Initialize arrays with defaults
        $titles = $keywords = $links1 = $links2 = $categories = $company = array();
        
        // Validate, unslash, and sanitize each input field
        if ( isset($_POST['bulk-option-titles']) ) {
            $titles = array_filter(array_map('trim', explode("\n", sanitize_textarea_field(wp_unslash($_POST['bulk-option-titles'])))));
        }
        
        if ( isset($_POST['bulk-option-keywords']) ) {
            $keywords = array_filter(array_map('trim', explode("\n", sanitize_textarea_field(wp_unslash($_POST['bulk-option-keywords'])))));
        }
        
        if ( isset($_POST['bulk-option-links1']) ) {
            $links1 = array_filter(array_map('trim', explode("\n", sanitize_textarea_field(wp_unslash($_POST['bulk-option-links1'])))));
        }
        
        if ( isset($_POST['bulk-option-links2']) ) {
            $links2 = array_filter(array_map('trim', explode("\n", sanitize_textarea_field(wp_unslash($_POST['bulk-option-links2'])))));
        }
        
        if ( isset($_POST['bulk-option-categories']) ) {
            $categories = array_filter(array_map('trim', explode("\n", sanitize_textarea_field(wp_unslash($_POST['bulk-option-categories'])))));
        }
        
        if ( isset($_POST['bulk-option-company']) ) {
            $company = array_filter(array_map('trim', explode("\n", sanitize_textarea_field(wp_unslash($_POST['bulk-option-company'])))));
        }
        
        // Properly sanitize boolean values
        $is_image = isset($_POST['is_image']) ? sanitize_text_field(wp_unslash($_POST['is_image'])) : 'no';
        $is_wp_post = isset($_POST['is_wp_post']) ? sanitize_text_field(wp_unslash($_POST['is_wp_post'])) : 'no';
        
        // Get image related data if image toggle is enabled
        $imgUrl = $imgAlt = array();
        if ( $is_image === 'yes' ) {
            if ( isset($_POST['bulk-option-image-url']) ) {
                $imgUrl = array_filter(array_map('trim', explode("\n", sanitize_textarea_field(wp_unslash($_POST['bulk-option-image-url'])))));
            }
            if ( isset($_POST['bulk-option-image-alt']) ) {
                $imgAlt = array_filter(array_map('trim', explode("\n", sanitize_textarea_field(wp_unslash($_POST['bulk-option-image-alt'])))));
            }
        }

        // Validate, unslash, and sanitize numeric inputs
        $density = isset($_POST['bulk-option-density']) ? absint(wp_unslash($_POST['bulk-option-density'])) : 1;
        $length = isset($_POST['bulk-option-length']) ? absint(wp_unslash($_POST['bulk-option-length'])) : 1000;
        $parent = isset($_POST['parent']) ? absint(wp_unslash($_POST['parent'])) : 0;

        // Validate required fields
        if ( empty($titles) ) {
            $result['error']['titles'] = __('Titles are required', 'ai-auto-seo');
        }
        
        if ( empty($keywords) ) {
            $result['error']['keywords'] = __('Keywords are required', 'ai-auto-seo');
        }

        // Only proceed if no validation errors
        if ( !isset($result['error']) ) {
            // Call the bulk import function
            $result = $ws4agpt->ws4agpt_bulk_import(
                $titles,
                $keywords,
                $links1,
                $links2,
                $categories,
                $company,
                $imgUrl,
                $imgAlt,
                $length,
                $density,
                $is_wp_post,
                $parent
            );
        }
    }
} elseif ( isset($_POST['bulk-csv-submit']) ) {
    if ( check_admin_referer('ws4agpt-bulk-options-csv-form') ) {
        // Validate all required file indices exist
        if ( isset($_FILES['bulk-options-csv']) && isset($_FILES['bulk-options-csv']['tmp_name']) && isset($_FILES['bulk-options-csv']['name']) && !empty($_FILES['bulk-options-csv']['tmp_name']) ) {
            // Sanitize the file path and name
            $csv_file = sanitize_text_field(wp_unslash($_FILES['bulk-options-csv']['tmp_name']));
            $csv_name = sanitize_file_name(wp_unslash($_FILES['bulk-options-csv']['name']));
            
            // Validate file type
            $file_type = wp_check_filetype(basename($csv_name), array('csv' => 'text/csv'));
            if ( $file_type['ext'] !== 'csv' ) {
                $result['error'] = __('Please upload a valid CSV file', 'ai-auto-seo');
                return;
            }

            // Initialize WP_Filesystem
            global $wp_filesystem;
            if ( empty($wp_filesystem) ) {
                require_once(ABSPATH . '/wp-admin/includes/file.php');
                WP_Filesystem();
            }

            // Read CSV file using WP_Filesystem
            $csv_content = $wp_filesystem->get_contents($csv_file);
            
            if ( $csv_content !== false ) {
                // Convert CSV content to array
                $rows = array();
                $lines = explode("\n", $csv_content);
                $headers = str_getcsv(array_shift($lines));
                
                foreach ($lines as $line) {
                    if ( empty(trim($line)) ) continue;
                    
                    $data = str_getcsv($line);
                    if ( count($data) === count($headers) ) {
                        $row = array();
                        foreach ($headers as $i => $header) {
                            $row[sanitize_key($header)] = isset($data[$i]) ? sanitize_text_field($data[$i]) : '';
                        }
                        $rows[] = $row;
                    }
                }
                
                // Process the CSV data using the global instance
                if ( method_exists($ws4agpt, 'ws4agpt_process_bulk_csv_import') ) {
                    $result = $ws4agpt->ws4agpt_process_bulk_csv_import($rows);
                } else {
                    $result['error'] = __('Bulk CSV import method not available', 'ai-auto-seo');
                }
            } else {
                $result['error'] = __('Unable to read CSV file', 'ai-auto-seo');
            }
        } else {
            $result['error'] = __('Please select a valid CSV file to upload', 'ai-auto-seo');
        }
    }
}

?><div class="wrap" id="ws4agpt-bulk-options">
<h1 class="wp-heading-inline"><?php echo esc_html( __( 'Bulk Article Generation', 'ai-auto-seo' ) );?></h1>

<hr class="wp-header-end">
<?php if( !empty($result['error']) ){ ?>
    <div class="notice notice-warning">
        <?php foreach($result['error'] as $key=>$error){?>
        <p><?php echo '<strong>' . esc_html($key) . ' :</strong> ' . esc_html($error); ?></p>
        <?php }?>
    </div>
<?php
}
if( !empty($result['success']) ){ ?>
    <div class="notice notice-success">
        <p><?php echo wp_kses_post($result['success']); ?></p>
    </div>
<?php } ?>

<p>&nbsp;</p>
<form method="post" action="<?php echo esc_url( menu_page_url( 'gpt_bulk_options', false ) ); ?>" enctype="multipart/form-data" id="ws4agpt-bulk-options-csv-form">
    <?php wp_nonce_field( 'ws4agpt-bulk-options-csv-form' ); ?>
    <p><?php esc_html_e( 'Upload a CSV file here', 'ai-auto-seo' ); ?> <strong style="color:red;"><?php esc_html_e( '(UTF-8 encoded):', 'ai-auto-seo' ); ?></strong> 
        <a href="<?php echo esc_url( WS4AGPT_ARTICLES_PLUGIN_URL . 'assets/bulk-upload-sheet-basic.csv' ); ?>"><?php esc_html_e( 'Download a Sample File', 'ai-auto-seo' ); ?></a>
    <br>
    <input type="file" name="bulk-options-csv"></p>
    <p class="submit"><input class="button button-primary csv-submit" type="submit" name="bulk-csv-submit" value="Import"></p></br>
</form>
<h2><?php esc_html_e( 'OR', 'ai-auto-seo' ); ?></h2>
<form method="post" action="<?php echo esc_url( menu_page_url( 'gpt_bulk_options', false ) ); ?>" id="ws4agpt-bulk-options-form">
    <?php wp_nonce_field( 'ws4agpt-bulk-options-form' ); ?>
    <div class="form-field term-name-wrap">
        <label for="bulk-option-titles"><?php esc_html_e( 'Titles:', 'ai-auto-seo' ); ?><br><small><?php esc_html_e( '(One title per line.)', 'ai-auto-seo' ); ?></small></label>
        <p><textarea id="bulk-option-titles" name="bulk-option-titles"></textarea></p>
    </div>
    <div class="form-field term-name-wrap">
        <label for="bulk-option-keywords"><?php esc_html_e( 'Keywords:', 'ai-auto-seo' ); ?><br><small><?php esc_html_e( '(One keyword per line.)', 'ai-auto-seo' ); ?></small></label>
        <p><textarea id="bulk-option-keywords" name="bulk-option-keywords"></textarea></p>
    </div>
    <div class="form-field term-name-wrap">
        <label for="bulk-option-links1"><?php esc_html_e( 'Keyword Link 1:', 'ai-auto-seo' ); ?><br><small><?php esc_html_e( '(One link per line.)', 'ai-auto-seo' ); ?></label>
        <p><textarea id="bulk-option-links1" name="bulk-option-links1"></textarea></p>
    </div>
    <div class="form-field term-name-wrap">
        <label for="bulk-option-links2"><?php esc_html_e( 'Keyword Link 2:', 'ai-auto-seo' ); ?><br><small><?php esc_html_e( '(One link per line.)', 'ai-auto-seo' ); ?></label>
        <p><textarea id="bulk-option-links2" name="bulk-option-links2"></textarea></p>
    </div>
    <div class="form-field term-name-wrap">
        <label for="bulk-option-categories"><?php esc_html_e( 'Category:', 'ai-auto-seo' ); ?><br><small><?php esc_html_e( '(One category per line.)', 'ai-auto-seo' ); ?></small></label>
        <p><textarea id="bulk-option-categories" name="bulk-option-categories"></textarea></p>
    </div>
    <div class="form-field term-name-wrap">
        <label for="bulk-option-company"><?php esc_html_e( 'Company:', 'ai-auto-seo' ); ?><br><small><?php esc_html_e( '(One company per line.)', 'ai-auto-seo' ); ?></small></label>
        <p><textarea id="bulk-option-company" name="bulk-option-company"></textarea></p>
    </div>
    
    <label><?php esc_html_e( 'Add Image to the posts:', 'ai-auto-seo' ); ?></label>
    <div class="switch_wrap">
        <p>
            <input type="checkbox" 
                   id="image_switch" 
                   name="is_image" 
                   value="yes" 
                   <?php checked($form_data['is_image'], 'yes'); ?> />
            <label for="image_switch"><?php esc_html_e( 'Toggle', 'ai-auto-seo' ); ?></label>
        </p>
    </div>

    <div id="image_wrap" <?php echo ( $form_data['is_image'] === 'yes' ) ? '' : 'style="' . esc_attr( 'display:none;' ) . '"'; ?>>
    
        <div class="form-field term-name-wrap">
            <label for="bulk-option-image-url"><?php esc_html_e( 'Image Urls:', 'ai-auto-seo' ); ?><br><small><?php esc_html_e( '(One link per line.)', 'ai-auto-seo' ); ?></small></label>
            <p><textarea id="bulk-option-image-url" name="bulk-option-image-url"></textarea></p>
        </div>
        <div class="form-field term-name-wrap">
            <label for="bulk-option-image-alt"><?php esc_html_e( 'Image Alternate texts:', 'ai-auto-seo' ); ?><br><small><?php esc_html_e( '(One category per line.)', 'ai-auto-seo' ); ?></small></label>
            <p><textarea id="bulk-option-image-alt" name="bulk-option-image-alt"></textarea></p>
        </div>
    </div>
    <div class="form-field term-parent-wrap">
        <label for="parent"><?php esc_html_e( 'Parent Category', 'ai-auto-seo' ); ?></label>
        <?php
        $dropdown_args = array(
            'hide_empty'       => 0,
            'hide_if_empty'    => false,
            'taxonomy'         => 'ws4agpt_gpt_cat',
            'name'             => 'parent',
            'orderby'          => 'name',
            'hierarchical'     => true,
            'show_option_none' => __( 'None','ai-auto-seo'),
        );
        wp_dropdown_categories( $dropdown_args );
        ?>
    </div>
    <p>
    <label><?php esc_html_e( 'Density Percentage:', 'ai-auto-seo' ); ?> <span id="densityvalue"></span></label>
    <input id="density" 
           class="form-controls" 
           type="range" 
           name="bulk-option-density" 
           min="1" 
           max="4" 
           value="<?php echo esc_attr($form_data['density']); ?>" 
           step="1" 
           oninput="showVal(this.value, 'densityvalue')" 
           onchange="showVal(this.value, 'densityvalue')" />
</p>

<p>
    <label><?php esc_html_e( 'Length:', 'ai-auto-seo' ); ?></label>
            <p><?php esc_html_e( 'Article lengths will vary according to settings. Article lengths may average between 500-10000 words. Length selection is a generalization, not an exact result due to settings and the variety of responses that can be returned using AI.', 'ai-auto-seo' ); ?></p>
			<p><?php esc_html_e( 'For articles greater than 2000 words, please select ChatGPT ', 'ai-auto-seo' ); ?>
			<a href="edit.php?post_type=ws4agpt_gpt_post&page=ws4agpt_gpt_settings&tab=gpt"><?php esc_html_e( 'settings', 'ai-auto-seo' ); ?></a> <?php esc_html_e( 'to 4o mini and set max tokens to 16000.', 'ai-auto-seo' ); ?></p>
            <span id="lengthvalue"></span></br>
    </label>
    <input id="length" 
           class="form-controls" 
           type="range" 
           name="bulk-option-length" 
           value="<?php echo esc_attr($form_data['length']); ?>" 
           min="100" 
           max="5000" 
           step="50" 
           oninput="showVal(this.value, 'lengthvalue')" 
           onchange="showVal(this.value, 'lengthvalue')" />
</p>

<label><?php esc_html_e( 'Post on this site post?', 'ai-auto-seo' ); ?></label>
<div class="switch_wrap">
    <input type="checkbox" 
           id="is_wp_post" 
           name="is_wp_post" 
           value="yes" 
           <?php checked($form_data['is_wp_post'], 'yes'); ?> />
    <label for="is_wp_post"><?php esc_html_e( 'Toggle', 'ai-auto-seo' ); ?></label>
	<div id="is_wp_post_error" style="color: red; margin-top: 5px; margin-bottom:5px; display: none;"></div>
</div>

    <p class="submit"><input class="button button-primary form-submit" type="submit" name="bulk-form-submit" value="<?php esc_attr_e( 'Save', 'ai-auto-seo' ); ?>"></p>
</form>
<p>&nbsp;</p>
</div>