<?php
/**
 * Fake Mailchimp + Sinch + Zippopotam + GeoIP endpoints for the PHP test-suite.
 * Started by tests/php/run.php with:  php -S 127.0.0.1:8099 tests/php/mock-providers.php
 *
 * Behaviour switches are files in tests/php/.tmp:
 *   fail-sinch      → Sinch returns HTTP 503
 *   fail-mailchimp  → Mailchimp returns HTTP 500
 * Every request is appended to tests/php/.tmp/requests.log as JSON.
 */
declare(strict_types=1);

$tmp = __DIR__ . '/.tmp';
@mkdir($tmp, 0777, true);
$path = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) ?: '/';
$body = file_get_contents('php://input') ?: '';
file_put_contents("$tmp/requests.log", json_encode([
    'method' => $_SERVER['REQUEST_METHOD'],
    'path' => $path,
    'headers' => ['authorization' => $_SERVER['HTTP_AUTHORIZATION'] ?? null, 'account' => $_SERVER['HTTP_ACCOUNT'] ?? null],
    'body' => json_decode($body, true),
]) . "\n", FILE_APPEND);

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

// --- Sinch Engage
if ($path === '/v1/messages') {
    if (file_exists("$tmp/fail-sinch")) {
        http_response_code(503);
        echo json_encode(['message' => 'service unavailable']);
        exit;
    }
    $in = json_decode($body, true);
    $out = [];
    foreach ($in['messages'] ?? [] as $m) {
        $out[] = ['message_id' => 'msg-' . substr(md5($m['destination_number'] . $m['content']), 0, 12), 'status' => 'queued', 'destination_number' => $m['destination_number']];
    }
    http_response_code(202);
    echo json_encode(['messages' => $out]);
    exit;
}

// --- Mailchimp
if (preg_match('#^/3\.0/lists/([^/]+)/members/([a-f0-9]{32})$#', $path, $m)) {
    if (file_exists("$tmp/fail-mailchimp")) {
        http_response_code(500);
        echo json_encode(['title' => 'Internal Error', 'detail' => 'boom']);
        exit;
    }
    $in = json_decode($body, true);
    echo json_encode(['id' => $m[2], 'email_address' => $in['email_address'] ?? '', 'status' => $in['status_if_new'] ?? 'subscribed', 'merge_fields' => $in['merge_fields'] ?? []]);
    exit;
}
if (preg_match('#^/3\.0/lists/[^/]+/members/[a-f0-9]{32}/tags$#', $path)) {
    http_response_code(204);
    exit;
}
if (preg_match('#^/3\.0/customer-journeys/#', $path)) {
    http_response_code(204);
    exit;
}

// --- Zippopotam
if (preg_match('#^/us/(\d{5})$#', $path, $m)) {
    if ($m[1] === '00000') {
        http_response_code(404);
        echo '{}';
        exit;
    }
    echo json_encode(['post code' => $m[1], 'places' => [['place name' => 'Norwood', 'state abbreviation' => 'MA', 'latitude' => '42.1945', 'longitude' => '-71.1995']]]);
    exit;
}

// --- ipapi.co
if (preg_match('#^/([^/]+)/json/?$#', $path)) {
    echo json_encode(['ip' => '203.0.113.9', 'city' => 'Providence', 'region_code' => 'RI', 'latitude' => 41.8240, 'longitude' => -71.4128]);
    exit;
}

http_response_code(404);
echo json_encode(['error' => 'mock: unknown path ' . $path]);