using Longbow;
using Longbow.Caching;
using Longbow.Caching.Configuration;
using Longbow.ExceptionManagement;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Globalization;
using System.Linq;

namespace Bootstrap.DataAccess
{
    public class RoleHelper
    {
        private const string RoleDataKey = "RoleData-CodeRoleHelper";
        /// <summary>
        /// 查询所有角色
        /// </summary>
        /// <param name="tId"></param>
        /// <returns></returns>
        public static IEnumerable<Role> RetrieveRoles(string tId = null)
        {
            string sql = "select * from Roles";
            var ret = CacheManager.GetOrAdd(RoleDataKey, CacheSection.RetrieveIntervalByKey(RoleDataKey), key =>
            {
                List<Role> roles = new List<Role>();
                DbCommand cmd = DBAccessManager.SqlDBAccess.CreateCommand(CommandType.Text, sql);
                try
                {
                    using (DbDataReader reader = DBAccessManager.SqlDBAccess.ExecuteReader(cmd))
                    {
                        while (reader.Read())
                        {
                            roles.Add(new Role()
                            {
                                ID = (int)reader[0],
                                RoleName = LgbConvert.ReadValue(reader[1], string.Empty),
                                Description = LgbConvert.ReadValue(reader[2], string.Empty)
                            });
                        }
                    }
                }
                catch (Exception ex) { ExceptionManager.Publish(ex); }
                return roles;
            }, CacheSection.RetrieveDescByKey(RoleDataKey));
            return string.IsNullOrEmpty(tId) ? ret : ret.Where(t => tId.Equals(t.ID.ToString(), StringComparison.OrdinalIgnoreCase));
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="id"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public static bool SaveRolesByUserId(int id, string value)
        {
            //UNDONE: 编写通过用户ID保存当前授权角色的方法
            return true;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public static IEnumerable<Role> RetrieveRolesByUserId()
        {
            //UNDONE: 编写通过用户ID获取所有角色的方法
            return new List<Role>() {
                new Role() { ID = 1, RoleName = "TestRole1", Description = "测试角色1" },
                new Role() { ID = 2, RoleName = "TestRole2", Description = "测试角色2" }
            };
        }
        /// <summary>
        /// 删除角色表
        /// </summary>
        /// <param name="IDs"></param>
        public static bool DeleteRole(string IDs)
        {
            bool ret = false;
            if (string.IsNullOrEmpty(IDs) || IDs.Contains("'")) return ret;
            try
            {
                string sql = string.Format(CultureInfo.InvariantCulture, "Delete from Roles where ID in ({0})", IDs);
                using (DbCommand cmd = DBAccessManager.SqlDBAccess.CreateCommand(CommandType.Text, sql))
                {
                    DBAccessManager.SqlDBAccess.ExecuteNonQuery(cmd);
                    ClearCache();
                    ret = true;
                }
            }
            catch (Exception ex)
            {
                ExceptionManager.Publish(ex);
            }
            return ret;
        }

        /// <summary>
        /// 保存新建/更新的角色信息
        /// </summary>
        /// <param name="p"></param>
        /// <returns></returns>
        public static bool SaveRole(Role p)
        {
            if (p == null) throw new ArgumentNullException("p");
            bool ret = false;
            if (!string.IsNullOrEmpty(p.RoleName) && p.RoleName.Length > 50) p.RoleName = p.RoleName.Substring(0, 50);
            if (!string.IsNullOrEmpty(p.Description) && p.Description.Length > 50) p.Description = p.Description.Substring(0, 500);
            string sql = p.ID == 0 ?
                "Insert Into Roles (RoleName, Description) Values (@RoleName, @Description)" :
                "Update Roles set RoleName = @RoleName, Description = @Description where ID = @ID";
            try
            {
                using (DbCommand cmd = DBAccessManager.SqlDBAccess.CreateCommand(CommandType.Text, sql))
                {
                    cmd.Parameters.Add(DBAccessManager.SqlDBAccess.CreateParameter("@ID", p.ID, ParameterDirection.Input));
                    cmd.Parameters.Add(DBAccessManager.SqlDBAccess.CreateParameter("@RoleName", p.RoleName, ParameterDirection.Input));
                    cmd.Parameters.Add(DBAccessManager.SqlDBAccess.CreateParameter("@Description", p.Description, ParameterDirection.Input));
                    DBAccessManager.SqlDBAccess.ExecuteNonQuery(cmd);
                }
                ret = true;
                ClearCache();
            }
            catch (DbException ex)
            {
                ExceptionManager.Publish(ex);
            }
            return ret;
        }

        // 更新缓存
        private static void ClearCache()
        {
            CacheManager.Clear(key => key.Contains("RoleData-"));
        }
    }
}