using Bootstrap.Security;
using Longbow.Configuration;
using Longbow.Data;
using Microsoft.Extensions.Primitives;
using MongoDB.Bson;
using MongoDB.Bson.Serialization;
using MongoDB.Bson.Serialization.Serializers;
using MongoDB.Driver;
using System;
using System.Linq;

namespace Bootstrap.DataAccess.MongoDB
{
    /// <summary>
    /// 
    /// </summary>
    public static class MongoDbAccessManager
    {
        private static IMongoDatabase _db = null;
        private static bool _register = false;
        private static readonly object _locker = new object();
        /// <summary>
        /// 
        /// </summary>
        public static IMongoDatabase DBAccess
        {
            get
            {
                if (_db == null)
                {
                    lock (_locker)
                    {
                        if (!_register)
                        {
                            _register = true;
                            ChangeToken.OnChange(() => ConfigurationManager.AppSettings.GetReloadToken(), () => _db = null);
                            InitClassMap();
                        }
                        InitDb();
                    }
                }
                return _db;
            }
        }

        #region Collections
        /// <summary>
        /// 
        /// </summary>
        public static IMongoCollection<DataAccess.Log> Logs
        {
            get
            {
                return DBAccess.GetCollection<DataAccess.Log>("Logs");
            }
        }

        /// <summary>
        /// 
        /// </summary>
        public static IMongoCollection<DataAccess.Exceptions> Exceptions
        {
            get
            {
                return DBAccess.GetCollection<DataAccess.Exceptions>("Exceptions");
            }
        }
        /// <summary>
        /// 
        /// </summary>
        public static IMongoCollection<BootstrapDict> Dicts
        {
            get
            {
                return DBAccess.GetCollection<BootstrapDict>("Dicts");
            }
        }

        /// <summary>
        /// 
        /// </summary>
        public static IMongoCollection<User> Users
        {
            get
            {
                return DBAccess.GetCollection<User>("Users");
            }
        }

        /// <summary>
        /// 
        /// </summary>
        public static IMongoCollection<Group> Groups
        {
            get
            {
                return DBAccess.GetCollection<Group>("Groups");
            }
        }

        /// <summary>
        /// 
        /// </summary>
        public static IMongoCollection<Role> Roles
        {
            get
            {
                return DBAccess.GetCollection<Role>("Roles");
            }
        }

        /// <summary>
        /// 
        /// </summary>
        public static IMongoCollection<BootstrapMenu> Menus
        {
            get
            {
                return DBAccess.GetCollection<BootstrapMenu>("Navigations");
            }
        }
        #endregion

        private static void InitDb()
        {
            var connectString = DbAdapterManager.GetConnectionString("ba");
            if (string.IsNullOrEmpty(connectString)) throw new InvalidOperationException("Please set the BA default value in configuration file.");

            var seq = connectString.Split(";", StringSplitOptions.RemoveEmptyEntries);
            if (seq.Length != 2) throw new InvalidOperationException("ConnectionString invalid in configuration file. It should be mongodb://127.0.0.1:27017;Data Source=BootstrapAdmin");

            var client = new MongoClient(seq[0]);
            _db = client.GetDatabase(seq[1].Split("=", StringSplitOptions.RemoveEmptyEntries).LastOrDefault());
        }

        private static void InitClassMap()
        {
            BsonSerializer.RegisterSerializer(DateTimeSerializer.LocalInstance);

            if (!BsonClassMap.IsClassMapRegistered(typeof(BootstrapDict)))
            {
                BsonClassMap.RegisterClassMap<BootstrapDict>(md =>
                {
                    md.AutoMap();
                    md.IdMemberMap.SetSerializer(new StringSerializer(BsonType.ObjectId));
                    md.IdMemberMap.SetIgnoreIfDefault(true);
                });
            }
            if (!BsonClassMap.IsClassMapRegistered(typeof(DataAccess.User)))
            {
                BsonClassMap.RegisterClassMap<DataAccess.User>(md =>
                {
                    md.AutoMap();
                    md.IdMemberMap.SetSerializer(new StringSerializer(BsonType.ObjectId));
                    md.IdMemberMap.SetIgnoreIfDefault(true);
                    md.UnmapMember(user => user.Checked);
                    md.UnmapMember(user => user.Period);
                    md.UnmapMember(user => user.NewPassword);
                    md.UnmapMember(user => user.UserStatus);
                });
            }
            if (!BsonClassMap.IsClassMapRegistered(typeof(BootstrapMenu)))
            {
                BsonClassMap.RegisterClassMap<BootstrapMenu>(md =>
                {
                    md.AutoMap();
                    md.IdMemberMap.SetSerializer(new StringSerializer(BsonType.ObjectId));
                    md.IdMemberMap.SetIgnoreIfDefault(true);
                    md.UnmapMember(m => m.CategoryName);
                    md.UnmapMember(m => m.Active);
                    md.UnmapMember(m => m.ParentName);
                    md.UnmapMember(m => m.Menus);
                });
            }
            if (!BsonClassMap.IsClassMapRegistered(typeof(DataAccess.Group)))
            {
                BsonClassMap.RegisterClassMap<DataAccess.Group>(md =>
                {
                    md.AutoMap();
                    md.IdMemberMap.SetSerializer(new StringSerializer(BsonType.ObjectId));
                    md.IdMemberMap.SetIgnoreIfDefault(true);
                    md.UnmapMember(group => group.Checked);
                });
            }
            if (!BsonClassMap.IsClassMapRegistered(typeof(DataAccess.Role)))
            {
                BsonClassMap.RegisterClassMap<DataAccess.Role>(md =>
                {
                    md.AutoMap();
                    md.IdMemberMap.SetSerializer(new StringSerializer(BsonType.ObjectId));
                    md.IdMemberMap.SetIgnoreIfDefault(true);
                    md.UnmapMember(role => role.Checked);
                });
            }
            if (!BsonClassMap.IsClassMapRegistered(typeof(DataAccess.Task)))
            {
                BsonClassMap.RegisterClassMap<DataAccess.Task>(md =>
                {
                    md.AutoMap();
                    md.IdMemberMap.SetSerializer(new StringSerializer(BsonType.ObjectId));
                    md.IdMemberMap.SetIgnoreIfDefault(true);
                });
            }
            if (!BsonClassMap.IsClassMapRegistered(typeof(DataAccess.Message)))
            {
                BsonClassMap.RegisterClassMap<DataAccess.Message>(md =>
                {
                    md.AutoMap();
                    md.IdMemberMap.SetSerializer(new StringSerializer(BsonType.ObjectId));
                    md.IdMemberMap.SetIgnoreIfDefault(true);
                });
            }
            if (!BsonClassMap.IsClassMapRegistered(typeof(DataAccess.Exceptions)))
            {
                BsonClassMap.RegisterClassMap<DataAccess.Exceptions>(md =>
                {
                    md.AutoMap();
                    md.IdMemberMap.SetSerializer(new StringSerializer(BsonType.ObjectId));
                    md.IdMemberMap.SetIgnoreIfDefault(true);
                    md.UnmapMember(ex => ex.Period);
                });
            }
            if (!BsonClassMap.IsClassMapRegistered(typeof(DataAccess.Log)))
            {
                BsonClassMap.RegisterClassMap<DataAccess.Log>(md =>
                {
                    md.AutoMap();
                    md.IdMemberMap.SetSerializer(new StringSerializer(BsonType.ObjectId));
                    md.IdMemberMap.SetIgnoreIfDefault(true);
                });
            }
        }
    }
}