<?php
defined($security_key) or exit;
ini_set('display_errors', '1');
    ini_set('display_startup_errors', '1');
    error_reporting(E_ALL); 
//------------------------------------------
// Marketing Folders
//------------------------------------------

//Connect to DB
$pdo = dbConnect($dbname);

// Function to build hierarchical tree structure
function buildFolderTree($folders, $parentId = null) {
    $tree = [];

    foreach ($folders as $folder) {
        if ($folder['parent_id'] == $parentId) {
            $children = buildFolderTree($folders, $folder['id']);
            $folder['children'] = $children; // Always include children array, even if empty
            $tree[] = $folder;
        }
    }

    return $tree;
}

//SoldTo is empty
if (empty($partner->soldto) || $partner->soldto == ''){$soldto_search = '%';} else {$soldto_search = '-%';}

//default whereclause
$whereclause = '';

//NEW ARRAY
$criterias = [];
$clause = '';

//Check for $_GET variables and build up clause
if(isset($get_content) && $get_content!=''){
    //GET VARIABLES FROM URL
    $requests = explode("&", $get_content);
    //Check for keys and values
    foreach ($requests as $y){
        $v = explode("=", $y);
        //INCLUDE VARIABLES IN ARRAY
        $criterias[$v[0]] = $v[1];

        if ($v[0] == 'page' || $v[0] =='p' || $v[0] =='totals' || $v[0] =='list' || $v[0] =='success_msg' || $v[0] == 'action' || $v[0] == 'tree'){
        //do nothing - these are not SQL parameters
        }
        elseif ($v[0] == 'parent_id') {
            if ($v[1] === 'null' || $v[1] === '') {
                $clause .= ' AND parent_id IS NULL';
            } else {
                $clause .= ' AND parent_id = :parent_id';
            }
        }
        elseif ($v[0] == 'search') {
            $clause .= ' AND (folder_name LIKE :search OR description LIKE :search)';
        }
        else {//create clause
            $clause .= ' AND '.$v[0].' = :'.$v[0];
        }
    }
    if ($whereclause == '' && $clause !=''){
        $whereclause = 'WHERE '.substr($clause, 4);
    } else {
        $whereclause .= $clause;
    }
}

//Define Query
if(isset($criterias['totals']) && $criterias['totals'] ==''){
//Request for total rows
    $sql = 'SELECT count(*) as count FROM marketing_folders '.$whereclause.'';
}
elseif (isset($criterias['list']) && $criterias['list'] =='') {
    //SQL for list (no paging)
    $sql = "SELECT
        mf.*,
        (SELECT COUNT(*) FROM marketing_files WHERE folder_id = mf.id) as file_count,
        (SELECT COUNT(*) FROM marketing_folders WHERE parent_id = mf.id) as subfolder_count,
        CASE
            WHEN mf.parent_id IS NOT NULL THEN
                (SELECT folder_name FROM marketing_folders WHERE id = mf.parent_id)
            ELSE NULL
        END as parent_folder_name
    FROM marketing_folders mf
    " . $whereclause . "
    ORDER BY mf.folder_name ASC";
}
else {
    //SQL for paging
    $sql = "SELECT
        mf.*,
        (SELECT COUNT(*) FROM marketing_files WHERE folder_id = mf.id) as file_count,
        (SELECT COUNT(*) FROM marketing_folders WHERE parent_id = mf.id) as subfolder_count,
        CASE
            WHEN mf.parent_id IS NOT NULL THEN
                (SELECT folder_name FROM marketing_folders WHERE id = mf.parent_id)
            ELSE NULL
        END as parent_folder_name
    FROM marketing_folders mf
    " . $whereclause . "
    ORDER BY mf.folder_name ASC
    LIMIT :page,:num_folders";
}

$stmt = $pdo->prepare($sql);

if (!empty($criterias)){
    foreach ($criterias as $key => $value){
        $key_condition = ':'.$key;
        if (str_contains($whereclause, $key_condition)){
            if ($key == 'search'){
                $search_value = '%'.$value.'%';
                $stmt->bindValue($key, $search_value, PDO::PARAM_STR);
            }
            elseif ($key == 'parent_id' && ($value === 'null' || $value === '')) {
                // Skip binding for NULL parent_id
                continue;
            }
            else {
                $stmt->bindValue($key, $value, PDO::PARAM_STR);
            }
        }
    }
}

//Add paging details
if(isset($criterias['totals']) && $criterias['totals']==''){
    $stmt->execute();
    $messages = $stmt->fetch();
    $messages = $messages[0];
}
elseif(isset($criterias['list']) && $criterias['list']==''){
    //Execute Query
    $stmt->execute();
    //Get results
    $messages = $stmt->fetchAll(PDO::FETCH_ASSOC);
}
else {
    $current_page = isset($criterias['p']) && is_numeric($criterias['p']) ? (int)$criterias['p'] : 1;
    $stmt->bindValue('page', ($current_page - 1) * $page_rows_folders, PDO::PARAM_INT);
    $stmt->bindValue('num_folders', $page_rows_folders, PDO::PARAM_INT);

    //Execute Query
    $stmt->execute();
    //Get results
    $messages = $stmt->fetchAll(PDO::FETCH_ASSOC);
}

// Check if tree structure is requested
if (isset($criterias['tree']) && isset($messages) && is_array($messages)) {
    // Build hierarchical tree structure
    $messages = buildFolderTree($messages);
}

//------------------------------------------
//JSON_ENCODE
//------------------------------------------
$messages = json_encode($messages, JSON_UNESCAPED_UNICODE);

//Send results
echo $messages;