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

echo "Starting Geo Attendance DB Fix...\n";

try {
// Define DOCUMENT_ROOT if not set (for CLI execution)
if (!isset($_SERVER['DOCUMENT_ROOT']) || empty($_SERVER['DOCUMENT_ROOT'])) {
    $_SERVER['DOCUMENT_ROOT'] = dirname(__DIR__); // Assumes script is in /geoattendance/
}

// Include mydb.php
require_once($_SERVER['DOCUMENT_ROOT'] . "/lib/mydb.php");

try {
    // Try connecting using the standard application logic (loads .env)
    $pdo = db_connect();
    echo "Connected via db_connect() (standard).\n";
} catch (Exception $e) {
    echo "Standard connection failed. Trying local fallback...\n";
    // Fallback for Local Development (CLI) where .env might have internal Docker hostnames
    $dsn = "mysql:host=127.0.0.1;dbname=chandj;charset=utf8";
    $pdo = new PDO($dsn, 'root', 'root');
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected via Local Fallback (127.0.0.1).\n";
}
    
    // 1. Check for ID 0 and move it if exists
    // We use a subquery to find a safe new ID
    echo "Checking for ID 0...\n";
    $stmt = $pdo->query("SELECT count(*) FROM geo_attendance WHERE id = 0");
    if ($stmt->fetchColumn() > 0) {
        echo " - Found row with ID 0. Moving it to a new ID...\n";
        // Calculate max id + 1
        $stmt = $pdo->query("SELECT MAX(id) FROM geo_attendance");
        $maxId = $stmt->fetchColumn();
        $newId = ($maxId > 0 ? $maxId : 0) + 1;
        
        $pdo->exec("UPDATE geo_attendance SET id = $newId WHERE id = 0");
        echo " - ID 0 moved to $newId.\n";
    }

    // 2. Apply AUTO_INCREMENT
    echo "Applying AUTO_INCREMENT to 'id' column...\n";
    $sql = "ALTER TABLE geo_attendance MODIFY id INT NOT NULL AUTO_INCREMENT";
    $pdo->exec($sql);
    echo " - Success! 'geo_attendance.id' is now AUTO_INCREMENT.\n";

} catch (Exception $e) {
    echo "Error: " . $e->getMessage() . "\n";
}
?>