using CZFW.Core;
using CZFW.Framework.Interface;
using CZFW.Framework.Model.Entity;
using CZFW.Framework.Model.ViewModel;
/**
* 命名空间: CZFW.Framework.Modules.Logic
*
* Copyright (c) 2016 CHUANGZHIKEJI Corporation. All rights reserved.
*┌──────────────────────────────────┐
*│　此技术信息为本公司机密信息，未经本公司书面同意禁止向第三方披露．　│
*│　版权所有：创执科技(北京)有限公司 　　　　　　　　　　　　　　     │
*└──────────────────────────────────┘
*/

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Linq.Expressions;
using CZFW.Framework.Model;

namespace CZFW.Framework.Logic
{
    /// <summary>
    /// 导航
    /// </summary>
    public class NavigationLogic : LogicBase<NavigationEntity>, INavigation
    {
        //public NavigationLogic(CZDbContext db) : base(db)
        //{
        //}

        /// <summary>
        /// 删除一个导航，及其子导航
        /// </summary>
        /// <param name="id"></param>
        /// <returns>如果添加成功返回null，否则返回错误信息</returns>
        public ResultModel RemoveById(int id)
        {
            string mark = GetValue(x => x.Id == id, x => x.Mark);
            return RemoveEntities(x => x.Mark.StartsWith(mark));
        }

        /// <summary>
        /// 获取导航节点树
        /// </summary>
        /// <param name="condition">查询条件</param>
        /// <returns></returns>
        private NavigationModel GetNavigationTree(Expression<Func<NavigationEntity, bool>> condition)
        {
            var entities = GetEntities(condition);
            return entities.Count == 0 ? new NavigationModel
            {
                Children = new List<NavigationModel>()
            } : new NavigationModel
            {
                Id = entities[0].Id,
                Mark = entities[0].Mark,
                Name = entities[0].Name,
                Children = BuildTreeView(GetEntities(x => x.Mark.StartsWith(entities[0].Mark) && x.Mark != entities[0].Mark, x => x.SortOrder, ListSortDirection.Ascending), entities[0].Mark)
            };
        }

        /// <summary>
        /// 根据Mark获取导航节点树
        /// </summary>
        /// <param name="mark">父导航Mark</param>
        /// <returns></returns>
        public NavigationModel GetNavigationTreeByMark(string mark)
        {
            //var user = OperatorProvider.Provider.GetCurrent();
            //var grantedIds = new List<int>();
            //if(user!=null)
            //{
            //    var roleIds = DbContext.Set<UserRoleEntity>().Where(x => x.UserId == user.UserId).Select(x => x.RoleId).Distinct().ToList();
            //    grantedIds = DbContext.Set<UserRoleNavigationEntity>().Where(x => roleIds.Contains(x.RoleId)).Select(x => x.Id).Distinct().ToList();
            //}
            return GetNavigationTree(x => x.Mark == mark/*&&grantedIds.Contains(x.Id)*/);
        }

        /// <summary>
        /// 根据父节点Id获取导航节点树
        /// </summary>
        /// <param name="id">父节点Id</param>
        /// <returns></returns>
        public NavigationModel GetNavigationTreeById(int id)
        {
            //var user = OperatorProvider.Provider.GetCurrent();
            //var grantedIds = new List<int>();
            //if (user != null)
            //{
            //    var roleIds = DbContext.Set<UserRoleEntity>().Where(x => x.UserId == user.UserId).Select(x => x.RoleId).Distinct().ToList();
            //    grantedIds = DbContext.Set<UserRoleNavigationEntity>().Where(x => roleIds.Contains(x.RoleId)).Select(x => x.Id).Distinct().ToList();
            //}
            return GetNavigationTree(x => x.Id == id );
        }

        /// <summary>
        /// 解析节点树
        /// </summary>
        /// <param name="navigationList"></param>
        /// <param name="mark"></param>
        private static IList<NavigationModel> BuildTreeView(IList<NavigationEntity> navigationList, string mark = "0")
        {
            IList<NavigationModel> navigationModels = new List<NavigationModel>();
            IList<NavigationEntity> children = navigationList.Where(x => x.Mark.StartsWith(mark) && (x.Mark.Length == mark.Length + 19)).ToList();
            foreach (NavigationEntity navigation in children)
            {
                NavigationModel navigationModel = new NavigationModel()
                {
                    Id = navigation.Id,
                    Description = navigation.Description,
                    Icon = navigation.Icon,
                    Mark = navigation.Mark,
                    Name = navigation.Name,
                    ParentMark = navigation.ParentMark,
                    SortOrder = navigation.SortOrder ?? 0,
                    Thumbnail = navigation.Thumbnail,
                    Url = navigation.Url
                };
                navigationModel.Children = BuildTreeView(navigationList, navigationModel.Mark);
                navigationModels.Add(navigationModel);
            }
            return navigationModels;
        }

        /// <summary>
        /// 根据Mark获取子导航列表
        /// </summary>
        /// <param name="mark">父Mark</param>
        /// <returns></returns>
        public IList<NavigationModel> GetChildren(string mark)
        {
            int length = mark.Length + 19;
            var res = Queryable.Where(x => x.Mark.StartsWith(mark) && x.Mark.Length == length).OrderBy(x => x.SortOrder).ToList().Select(x => new NavigationModel()
            {
                Id = x.Id,
                Description = x.Description,
                Icon = x.Icon,
                Mark = x.Mark,
                Name = x.Name,
                Url = x.Url,
                ParentMark = x.ParentMark,
                SortOrder = x.SortOrder ?? 0,
                Thumbnail = x.Thumbnail
            }).ToList();
            return res;
        }

        /// <summary>
        /// 根据Mark获取子导航列表
        /// </summary>
        /// <param name="mark">父Mark</param>
        /// <returns></returns>
        public IList<NavigationModel> GetAllChildrenByMark(string mark)
        {
            var res = Queryable.Where(x => x.Mark.StartsWith(mark) && x.Mark != mark).OrderBy(x => x.Mark).ThenBy(x => x.SortOrder).ToList().Select(x => new NavigationModel()
            {
                Id = x.Id,
                Description = x.Description,
                Icon = x.Icon,
                Mark = x.Mark,
                Name = x.Name,
                Url = x.Url,
                ParentMark = x.ParentMark,
                SortOrder = x.SortOrder ?? 0,
                Thumbnail = x.Thumbnail
            }).ToList();
            return res;
        }

        /// <summary>
        /// 根据Id获取子导航列表
        /// </summary>
        /// <param name="id">父Id</param>
        /// <returns></returns>
        public IList<NavigationModel> GetAllChildrenById(int id)
        {
            return GetAllChildrenByMark(GetValue(x => x.Id == id, x => x.Mark));
        }

        public ResultModel AddNavigation(NavigationEntity entity)
        {
            if (string.IsNullOrWhiteSpace(entity.ParentMark))
                entity.ParentMark = "0";
            entity.Mark = Utility.GenerateTreeMark(entity.ParentMark);
            var res = AddEntity(entity);
            return res;
        }

        public IList<KeyValuePair<string, int>> GetColumnList(string key = null)
        {
            var result = Queryable.Select(x => new KeyValuePair<string, int>(x.Name, x.Id)).ToList();
            return result;           
        }
    }
}