<?php
require_once __DIR__ . '/db.php';
require_once __DIR__ . '/config.php';

header('Content-Type: application/json; charset=utf-8');

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    echo json_encode(['success' => false, 'message' => 'Invalid request method']);
    exit;
}

$data = json_decode(file_get_contents('php://input'), true);

if (!$data) {
    echo json_encode(['success' => false, 'message' => 'No data provided']);
    exit;
}

try {
    // Add vehicle_status column to history if it doesn't exist
    try {
        $pdo->exec("ALTER TABLE vehicle_inspections ADD COLUMN vehicle_status VARCHAR(50) NULL");
    } catch (PDOException $e) {}

    $pdo->beginTransaction();

    // 1. Save Inspection History
    $stmt = $pdo->prepare("
        INSERT INTO vehicle_inspections 
        (vehicle_id, inspector_cid, inspection_date, inspection_time, mileage, fuel_level, other_items, items_json, vehicle_status) 
        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
    ");
    
    $stmt->execute([
        $data['vehicle_id'],
        $data['inspector_cid'],
        $data['inspection_date'],
        $data['inspection_time'],
        $data['mileage'],
        $data['fuel_level'],
        $data['other_items'] ?? '',
        json_encode($data['items'], JSON_UNESCAPED_UNICODE),
        $data['vehicle_status'] ?? 'available'
    ]);
    
    // 2. Update Vehicle Status
    if (!empty($data['vehicle_status'])) {
        $updateStmt = $pdo->prepare("UPDATE vehicles SET status = ? WHERE id = ?");
        $updateStmt->execute([$data['vehicle_status'], $data['vehicle_id']]);
    }

    $pdo->commit();

    // 3. Send Telegram Notification
    if (defined('TELEGRAM_BOT_TOKEN') && defined('TELEGRAM_CHAT_ID') && !empty(TELEGRAM_BOT_TOKEN) && !empty(TELEGRAM_CHAT_ID)) {
        // Get vehicle info
        $vStmt = $pdo->prepare("SELECT license_plate, brand, model FROM vehicles WHERE id = ?");
        $vStmt->execute([$data['vehicle_id']]);
        $vehicle = $vStmt->fetch();

        // Get driver info
        $dStmt = $pdo->prepare("SELECT first_name, last_name FROM drivers WHERE hr_cid = ?");
        $dStmt->execute([$data['inspector_cid']]);
        $driver = $dStmt->fetch();

        $vName = $vehicle ? trim("{$vehicle['brand']} {$vehicle['model']}") : "ID: {$data['vehicle_id']}";
        $vPlate = $vehicle ? $vehicle['license_plate'] : "-";
        
        // Use inspector_name from frontend payload if provided
        $dName = !empty($data['inspector_name']) ? $data['inspector_name'] : ($driver ? "{$driver['first_name']} {$driver['last_name']}" : $data['inspector_cid']);

        $abnormalCount = count(array_filter($data['items'], function($i) { return $i['status'] === 'abnormal'; }));
        $statusText = $data['vehicle_status'] === 'available' ? '✅ พร้อมใช้งาน' : '❌ ไม่พร้อมใช้งาน/ส่งซ่อม';

        // Convert date to Thai format (DD-MM-YYYY in BE)
        $dateParts = explode('-', $data['inspection_date']);
        $thaiDate = count($dateParts) == 3 ? $dateParts[2] . '-' . $dateParts[1] . '-' . ((int)$dateParts[0] + 543) : $data['inspection_date'];

        $msg = "📋 <b>รายงานตรวจเช็ครถประจำวัน</b>\n\n";
        $msg .= "🚗 <b>รถ:</b> {$vName}\n";
        $msg .= "📝 <b>ทะเบียน:</b> {$vPlate}\n";
        $msg .= "👤 <b>ผู้ตรวจ:</b> {$dName}\n";
        $msg .= "📅 <b>วันที่:</b> {$thaiDate} เวลา {$data['inspection_time']} น.\n";
        
        $formattedMileage = number_format((float)$data['mileage']);
        $formattedFuel = number_format((float)$data['fuel_level'], 2); // Assuming fuel could have decimals, or we can use 0 decimals if preferred, but usually float is fine. Wait, let me just format it intelligently.
        // If fuel_level has decimal part like .00, we might want to trim it, or just use number_format($data['fuel_level'], strpos($data['fuel_level'], '.') !== false ? 2 : 0)
        // A simple way is to use float cast
        $formattedFuel = rtrim(rtrim(number_format((float)$data['fuel_level'], 2, '.', ','), '0'), '.');
        if ($formattedFuel === '') $formattedFuel = '0';
        
        $msg .= "🛣️ <b>เลขไมล์:</b> {$formattedMileage} กม.\n";
        $msg .= "⛽ <b>น้ำมัน:</b> {$formattedFuel} ลิตร\n";
        $msg .= "📊 <b>สถานะรถ:</b> {$statusText}\n";
        if ($abnormalCount > 0) {
            $msg .= "\n⚠️ <b>พบจุดผิดปกติ {$abnormalCount} จุด:</b>\n";
            foreach($data['items'] as $item) {
                if($item['status'] === 'abnormal') {
                    $msg .= "- {$item['name']}: {$item['reason']}\n";
                }
            }
        } else {
            $msg .= "\n✨ <b>ผลการตรวจ:</b> ปกติทุกจุด";
        }
        
        $url = "https://api.telegram.org/bot" . TELEGRAM_BOT_TOKEN . "/sendMessage";
        $tgData = [
            'chat_id' => TELEGRAM_CHAT_ID,
            'text' => $msg,
            'parse_mode' => 'HTML'
        ];
        
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($tgData));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_exec($ch);
        curl_close($ch);
    }
    
    echo json_encode(['success' => true, 'message' => 'บันทึกข้อมูลและอัปเดตสถานะรถเรียบร้อยแล้ว']);
} catch (PDOException $e) {
    if ($pdo->inTransaction()) {
        $pdo->rollBack();
    }
    echo json_encode(['success' => false, 'message' => 'Database error: ' . $e->getMessage()]);
}