// ==========================================================================
//  Squidex Headless CMS
// ==========================================================================
//  Copyright (c) Squidex UG (haftungsbeschraenkt)
//  All rights reserved. Licensed under the MIT license.
// ==========================================================================

using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using Jint;
using Jint.Native;
using Jint.Runtime.Interop;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Security;
using Squidex.Shared.Identity;
using Squidex.Shared.Users;

namespace Squidex.Domain.Apps.Core.Scripting
{
    public static class JintUser
    {
        private static readonly char[] ClaimSeparators = { '/', '.', ':' };

        public static JsValue Create(Engine engine, IUser user)
        {
            var isClient = user.Claims.Any(x => x.Type == OpenIdClaims.ClientId);

            return CreateUser(
                engine,
                user.Id,
                isClient,
                user.Email,
                user.Claims.DisplayName(),
                user.Claims);
        }

        public static JsValue Create(Engine engine, ClaimsPrincipal principal)
        {
            var token = principal.Token();

            return CreateUser(
                engine,
                token?.Identifier ?? string.Empty,
                token?.Type != RefTokenType.Subject,
                principal.OpenIdEmail()!,
                principal.Claims.DisplayName(),
                principal.Claims);
        }

        private static JsValue CreateUser(Engine engine, string id, bool isClient, string email, string? name, IEnumerable<Claim> allClaims)
        {
            var claims =
                allClaims.GroupBy(x => x.Type.Split(ClaimSeparators).Last())
                    .ToDictionary(
                        x => x.Key,
                        x => x.Select(y => y.Value).ToArray());

            var result = new Dictionary<string, object?>
            {
                ["id"] = id,
                ["email"] = email,
                ["isClient"] = isClient,
                ["isUser"] = !isClient,
                ["name"] = name,
                ["claims"] = claims
            };

            return JsValue.FromObject(engine, result);
        }
    }
}