import 'package:chat_server/objectbox.g.dart';
import 'package:relic/relic.dart';

import '../../config/config.dart';
import '../state/app_state.dart';
import '../utils/extensions.dart';

/// Public endpoint for cross-server identity verification
/// Called by other servers to verify a user's public key
///
/// GET /.well-known/users/{username}
/// Returns: { userId, publicKey, username, displayName, avatarUrl }
Future<Response> publicUserHandler(Request req) async {
  final username = req.rawPathParameters[#username];
  if (username == null) {
    return Response.badRequest(
      body: Body.fromString('Username required'),
    );
  }

  final query = userBox
      .query(
        ChatUser_.username.equals(username) & ChatUser_.isLocal.equals(true),
      )
      .build();

  final user = query.findFirst();
  query.close();

  if (user == null) {
    return Response.notFound(
      body: Body.fromString('User not found'),
    );
  }

  return Response.ok(
    body: {
      'userId': user.userId,
      'username': user.username,
      'displayName': user.displayName,
      'avatarUrl': user.avatarUrl,
      'bio': user.bio,
      'publicKey': user.publicKey,
      'homeServer': Config.serverHost,
      'createdAt': user.createdAt.toIso8601String(),
    }.toBody,
  );
}

/// Public endpoint to verify a user exists
/// Lightweight check without full profile
///
/// GET /.well-known/verify/{userId}
/// Returns: { exists, userId, publicKey }
Future<Response> publicVerifyHandler(Request req) async {
  final userId = req.rawPathParameters[#userId];
  if (userId == null) {
    return Response.badRequest(
      body: Body.fromString('userId required'),
    );
  }

  final query = userBox
      .query(
        ChatUser_.userId.equals(userId) & ChatUser_.isLocal.equals(true),
      )
      .build();

  final user = query.findFirst();
  query.close();

  if (user == null) {
    return Response.ok(
      body: {
        'exists': false,
        'userId': userId,
      }.toBody,
    );
  }

  return Response.ok(
    body: {
      'exists': true,
      'userId': user.userId,
      'publicKey': user.publicKey,
      'username': user.username,
    }.toBody,
  );
}

/// Public server info
///
/// GET /.well-known/server
/// Returns: { serverHost, serverName, version }
Future<Response> publicServerInfoHandler(Request req) async {
  return Response.ok(
    body: {
      'serverHost': Config.serverHost,
      'serverName': Config.serverName,
      'version': '0.1.0',
      'features': ['identity', 'chat', 'sticker-packs'],
    }.toBody,
  );
}