<?php
/**
 * Parker County Slingshot - Booking API
 */
require_once __DIR__ . '/../config.php';

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    jsonOut(['success'=>false,'error'=>'Method not allowed'], 405);
}

$name    = trim($_POST['name']    ?? '');
$email   = trim($_POST['email']   ?? '');
$phone   = trim($_POST['phone']   ?? '');
$dob     = trim($_POST['dob']     ?? '');
$method  = trim($_POST['payment_method'] ?? 'cash');
$notes   = trim($_POST['notes']   ?? '');
$startD  = trim($_POST['start_date'] ?? '');
$endD    = trim($_POST['end_date']   ?? '');

// Validate required fields
if (!$name || !$email || !$phone || !$dob || !$startD || !$endD) {
    jsonOut(['success'=>false,'error'=>'All fields are required.']);
}

if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    jsonOut(['success'=>false,'error'=>'Invalid email address.']);
}

// Validate dates
$start = DateTime::createFromFormat('Y-m-d', $startD);
$end   = DateTime::createFromFormat('Y-m-d', $endD);
if (!$start || !$end || $end <= $start) {
    jsonOut(['success'=>false,'error'=>'Invalid dates selected.']);
}

$days = (int)$start->diff($end)->days;
$minDays = (int)(getSetting('min_days', 1));
$maxDays = (int)(getSetting('max_days', 3));

if ($days < $minDays || $days > $maxDays) {
    jsonOut(['success'=>false,'error'=>"Rental must be $minDays-$maxDays days."]);
}

// Validate age (25+)
$dobDt = DateTime::createFromFormat('Y-m-d', $dob);
if (!$dobDt) jsonOut(['success'=>false,'error'=>'Invalid date of birth.']);
$age = (new DateTime())->diff($dobDt)->y;
if ($age < 25) {
    jsonOut(['success'=>false,'error'=>'Must be 25 or older to rent.']);
}

// Check availability
$conflict = db()->prepare("
    SELECT COUNT(*) FROM pcs_bookings
    WHERE status IN ('approved','active','pending')
    AND NOT (end_date <= :start OR start_date >= :end)
");
$conflict->execute(['start'=>$startD,'end'=>$endD]);
if ($conflict->fetchColumn() > 0) {
    jsonOut(['success'=>false,'error'=>'Those dates are no longer available.']);
}

// Check blocked dates
$cursor = clone $start;
while ($cursor <= $end) {
    $blocked = db()->prepare("SELECT id FROM pcs_blocked_dates WHERE blocked_date=?");
    $blocked->execute([$cursor->format('Y-m-d')]);
    if ($blocked->fetch()) {
        jsonOut(['success'=>false,'error'=>'One or more selected dates are unavailable.']);
    }
    $cursor->modify('+1 day');
}

// Handle file uploads
$licenseFile  = null;
$insuranceFile = null;

function saveUpload(string $field, string $dir, string $prefix): ?string {
    if (empty($_FILES[$field]['tmp_name'])) return null;
    $file = $_FILES[$field];
    $allowed = ['image/jpeg','image/png','image/gif','image/webp','application/pdf'];
    if (!in_array($file['type'], $allowed)) return null;
    if ($file['size'] > MAX_UPLOAD_BYTES) return null;

    if (!is_dir($dir)) mkdir($dir, 0755, true);
    $ext  = pathinfo($file['name'], PATHINFO_EXTENSION);
    $name = $prefix.'_'.time().'_'.bin2hex(random_bytes(4)).'.'.$ext;
    $path = $dir.$name;
    move_uploaded_file($file['tmp_name'], $path);
    return $name;
}

$licenseFile   = saveUpload('license',   LICENSE_DIR,   'lic');
$insuranceFile = saveUpload('insurance', INSURANCE_DIR, 'ins');

if (!$licenseFile) {
    jsonOut(['success'=>false,'error'=>"Driver's license upload failed. Check file type and size."]);
}
if (!$insuranceFile) {
    jsonOut(['success'=>false,'error'=>'Insurance upload failed. Check file type and size.']);
}

// Create or find customer
$customer = db()->prepare("SELECT id FROM pcs_customers WHERE email=?");
$customer->execute([$email]);
$cust = $customer->fetch();

if ($cust) {
    $custId = $cust['id'];
    db()->prepare("UPDATE pcs_customers SET name=?,phone=?,dob=? WHERE id=?")
        ->execute([$name,$phone,$dob,$custId]);
} else {
    db()->prepare("INSERT INTO pcs_customers (email,name,phone,dob) VALUES (?,?,?,?)")
        ->execute([$email,$name,$phone,$dob]);
    $custId = db()->lastInsertId();
}

// Generate booking ref
$ref = 'PSR-'.strtoupper(bin2hex(random_bytes(3)));
$pricePerDay = (float)(getSetting('price_per_day', 150));
$total = $days * $pricePerDay;

// Get available fleet
$fleet = db()->query("SELECT id FROM pcs_fleet WHERE is_available=1 LIMIT 1")->fetch();
$fleetId = $fleet['id'] ?? null;

// Insert booking
db()->prepare("INSERT INTO pcs_bookings
    (booking_ref,customer_id,fleet_id,start_date,end_date,days,price_per_day,total_amount,
     payment_method,license_file,insurance_file,customer_notes)
    VALUES (?,?,?,?,?,?,?,?,?,?,?,?)")->execute([
    $ref, $custId, $fleetId, $startD, $endD, $days,
    $pricePerDay, $total, $method, $licenseFile, $insuranceFile, $notes
]);

jsonOut(['success'=>true,'ref'=>$ref,'message'=>'Reservation submitted successfully.']);