<?php
header('Content-Type: application/json');

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

$response = [
    'success' => false,
    'message' => 'An error occurred.',
    'serviceable' => false
];

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    $response['message'] = 'Invalid request method.';
    echo json_encode($response);
    exit;
}

$input = json_decode(file_get_contents('php://input'), true);
$address = $input['address'] ?? '';

if (empty($address)) {
    $response['message'] = 'Address cannot be empty.';
    echo json_encode($response);
    exit;
}

// This is a very simple search. A real-world application would need a more robust
// address parsing and matching engine (e.g., using Google Geocoding API and spatial data).
// For this demo, we'll just do a broad search on the input string.

try {
    $pdo = db();
    $stmt = $pdo->prepare(
        "SELECT COUNT(*) FROM serviceable_addresses WHERE CONCAT_WS(' ', street, suburb, state, postcode) LIKE ?"
    );
    $stmt->execute(['%' . $address . '%']);
    $count = $stmt->fetchColumn();

    if ($count > 0) {
        $response['serviceable'] = true;
        $response['message'] = 'Great news! Your address is serviceable.';
    } else {
        $response['serviceable'] = false;
        $response['message'] = "Sorry, we don't seem to be in your area yet. Please contact us for more information.";
    }
    $response['success'] = true;

} catch (PDOException $e) {
    // In a real app, you would log this error, not expose it to the user.
    $response['message'] = 'Database error.'; // Generic message for the user
    // error_log($e->getMessage()); // Example of logging
}

echo json_encode($response);