<?php
ini_set('display_errors', 1);

require_once '../../../../resources/base_path_include.php';

require_once $base_path_to_learning_resources  . "includes/connect.php"; // use require for mandatory files
require_once $base_path_to_learning_resources . 'lib/function.php';
require_once $base_path_to_learning_resources . 'lib/validate_api_signature.php';

//valdation file
require_once $base_path_to_learning_resources . 'lib/validate_function.php';
require_once $base_path_to_learning . 'user_management/authenticate.php';
require_once $base_path_to_learning . 'functions/common_functions.php';
//db access function
require_once $base_path_to_learning_resources . 'includes/specific_db_config.php';

//aws image store
require_once $base_path_to_learning_resources . 'lib/bucket_functions/bucket_functions.php';
require_once $base_path_to_learning . "vendor/autoload.php";

require_once $base_path_to_learning_resources . 'includes/aws_bucket_config.php';

require_once $base_path_to_learning  . 'admin_api/modules/library_management/library_function.php';

use Aws\S3\S3Client;
use Aws\S3\Exception\S3Exception;

$postdata = json_decode(file_get_contents("php://input"), true);

checkIfNoPhpContentsReceive();
// print_r($postdata);
if (
    
    !isset($postdata['api_signature']) or !checkIfIssetAndNotEmpty($postdata['api_signature']) or
    !isset($postdata['function_type']) or !checkIfIssetAndNotEmpty($postdata['function_type'])  or !isset($postdata['jwt_token']) or  !isset($postdata['jwt_token'])
) {
    errorreturn("All * fields are required.");
}
validateApiSignature($postdata['api_signature']);


$jwttoken = $postdata['jwt_token'];
$jwt_validate = authenticate_jwt($jwttoken);
$userid = $jwt_validate->data->id;
$workspace_id = $jwt_validate->data->workspace_id;
$username = $jwt_validate->data->username;
$role = $jwt_validate->data->role;
$branch_id = $jwt_validate->data->branch_id;
$institution_id = $jwt_validate->data->institution_id;

$specific_db_name = validateUserAccess($conn_rjllearning, $userid, $role, $workspace_id,["principal"], null);
if (!$specific_db_name) {
    errorreturn('Access denied.');
} else {
    $conn_rjllearning_specific = dynamicDbConnection($specific_db_name);
}

require_once $base_path_to_learning . 'user_management/user_versioning.php';

$version = isset($_POST['version']) ? $_POST['version'] : (isset($postdata['version']) ? $postdata['version'] : null);
$updated_time = isset($_POST['updated_time']) ? $_POST['updated_time'] : (isset($postdata['updated_time']) ? $postdata['updated_time'] : null);

$response = user_data_refresh($conn_rjllearning, $conn_rjllearning_specific, $version, $updated_time, $userid, $institution_id);

function getroute($conn_rjllearning_specific, $institution_id, $search_string , $branch_id , $limit , $offset ) {
    // Step 1: Count total rows
    $sql = "SELECT COUNT(*) as total_rows FROM bus_stops WHERE institution_id = ?";
    $stmt = $conn_rjllearning_specific->prepare($sql);
    $stmt->execute([$institution_id]);
    $result_total = $stmt->fetch();
    $total_rows = $result_total['total_rows'];

    // Step 2: Build SQL query for fetching route information
    $sql_session = "SELECT * FROM bus_stops WHERE institution_id = ?";
    $array_params = [$institution_id];

    // Step 3: Handle branch_id if it's not null or 'all'
     if ($branch_id == 'all') {
            $sql_session .= "";
        } else if ($branch_id !=  null  && $branch_id != 'all') {
            $sql_session .= " AND branch_id = ? ";
            $array_params[] = $branch_id;
        }

    // Step 4: Handle search string if provided
    if ($search_string !== null) {
        $sql_session .= " AND stop_names LIKE ?";
        $array_params[] = '%' . $search_string . '%';
    }

    // Step 5: Add LIMIT and OFFSET if limit is not 'all'
    if ($limit !== 'all') {
        $sql_session .= "LIMIT " . $offset . " ," . $limit . "";
    }

    // Step 6: Execute the SQL query to fetch bus stop data
    $stmt = $conn_rjllearning_specific->prepare($sql_session);
    $stmt->execute($array_params);
    $session_rows = $stmt->fetchAll();
 

    // Step 7: Prepare the return data
    $array_return = [];
    foreach ($session_rows as $rows) {
        // $branch_info = [];
        // $branch_id_json = $rows['branch_id'];

        // // Decode branch_id if it's a JSON-encoded array
        // $branch_info_array = json_decode($branch_id_json, true);

        // if (is_array($branch_info_array)) {
        //     // Fetch corresponding branch names for the decoded branch IDs
        //     $branch_ids = implode(',', array_map('intval', $branch_info_array));
        //     $sql_branch = "SELECT * FROM branch WHERE institution_id = ? AND id IN ($branch_ids)";
        //     $stmt_branch = $conn_rjllearning_specific->prepare($sql_branch);
        //     $stmt_branch->execute([$institution_id]);
        //     $branch_rows = $stmt_branch->fetchAll();

        //     foreach ($branch_rows as $branch_row) {
        //         $branch_info[] = [
        //             'branch_id' => $branch_row['id'],
        //             'branch_name' => ucwords($branch_row['name'])
        //         ];
        //     }
        // }
$branch_info = getBranchInfo($conn_rjllearning_specific, $institution_id, $rows['branch_id']);
        // Append each bus stop's information to the result array
        $array_return[] = [
            'bus_stop_id' => $rows['id'],
            'institution_id' => $rows['institution_id'],
            'branch' => $branch_info,
            'stop_names' => $rows['stop_names'],
            'proximity' => $rows['proximity'],
            'charges' => $rows['charges']
        ];
    }

    // Step 8: Check if max reach is achieved (if the number of rows fetched is less than the limit)
    $maxreach = (count($session_rows) < $limit && $limit !== 'all') ? 1 : 0;

    // Step 9: Return the results
    return [
        'total_rows' => $total_rows,
        'routes_info' => $array_return,
        'maxreach' => $maxreach
    ];
}

if ($postdata['function_type'] == "fetch_stop") {
 
    $check_academic_confirmation = CheckAcademicSession($conn_rjllearning_specific, $institution_id);
    if ($check_academic_confirmation != true) {
        errorreturn("Access denied. Academic session not active.");
    }
   
    if (isset($postdata['search_string']) and !empty($postdata['search_string'])) {
        $search_string = trim($postdata['search_string']);
    } else {
        $search_string = null;
    }


    $limit = $postdata['limit'];

    $page = (isset($postdata['page']) and isNumeric($postdata['page'])) ? (int)$postdata['page'] : 1;

    if ($limit != 'all') {
        $offset = ($page - 1) * $limit;
        $success['data'] = getroute($conn_rjllearning_specific, $institution_id, $search_string, $branch_id, $limit, $offset);
        successreturn($success);
    } else {
        $success['data'] = getroute($conn_rjllearning_specific, $institution_id, $search_string, $branch_id, $limit, null);
        successreturn($success);
    }
}
