using BaseOUDAL;
using YLErp.Models;

namespace YLErp.BLL
{
    /// <summary>
    /// 系统字典数据(从YLErpWeb中迁移)
    /// </summary>
    public class DictionaryBLL
    {
        public static List<SelectItem> GetList(string dictName, bool appendblank, string defaultValue = "", bool IsShowShortName = false)
        {
            var list = new List<SelectItem>();

            if (appendblank == true)
            {
                list.Add(new SelectItem { Value = "", Text = @"---" });
            }

            using (var db = new ErpBaseContext())
            {
                var query = from i in db.DictionaryItems
                            join d in db.Dictionaries on i.DictId equals d.Id
                            where d.Name == dictName
                            orderby i.IndexNum, i.Name
                            select i;

                list.AddRange(query.AsEnumerable().Select(c => new SelectItem
                {
                    Value = !string.IsNullOrWhiteSpace(c.ShortName) && IsShowShortName ? c.ShortName : c.Name,
                    Text = c.Name,
                    Selected = c.Name == defaultValue
                }));

                return list;
            }
        }

        public static YLDictionary GetDictionary(params string[] dictName)
        {
            var yldic = new YLDictionary();

            if (dictName == null || !dictName.Any())
            {
                return yldic;
            }

            using (var db = new ErpBaseContext())
            {
                var query = from di in db.DictionaryItems
                            join d in db.Dictionaries on di.DictId equals d.Id
                            where dictName.Contains(d.Name) && d.Name != null
                            orderby di.IndexNum, di.Name
                            select new
                            {
                                dictName = d.Name,
                                itemName = di.Name,
                                di.ShortName
                            };

                foreach (var c in query)
                {
                    yldic.AddItem(c.dictName, c.itemName, c.ShortName);
                }
            }

            return yldic;
        }

        /// <summary>
        /// 根据字典名称和key获取列表
        /// </summary>
        /// <param name="dictName">字典名称</param>
        /// <param name="dictKey">字典项名称</param>
        /// <returns></returns>
        public static List<DictionaryItem> GetDictionaryItems(string dictName, string dictKey = null)
        {
            using (var basedb = new ErpBaseContext())
            {
                var query = from dic in basedb.Dictionaries.Where(o => o.Name == dictName)
                            join items in basedb.DictionaryItems on dic.Id equals items.DictId
                            select items;
                if (!string.IsNullOrWhiteSpace(dictKey))
                {
                    query = query.Where(O => O.Name == dictKey);
                }
                return query.ToList();
            }
        }

        public static DictionaryItem GetDictionaryItemByName(string name)
        {
            using (var db = new ErpBaseContext())
            {
                return db.DictionaryItems.FirstOrDefault(x => x.Name == name);
            }
        }
    }

    public class YLDictionaryItem
    {
        public string Name { get; set; }

        public string ShortName { get; set; }
    }

    public class YLDictionary
    {
        Dictionary<string, List<YLDictionaryItem>> _dic;

        public YLDictionary AddItem(string dictName, string itemName, string itemShortName)
        {
            return AddItem(dictName, new YLDictionaryItem
            {
                Name = itemName,
                ShortName = itemShortName
            });
        }

        public YLDictionary AddItem(string dictName, YLDictionaryItem dicItem)
        {
            if (dictName is null)
            {
                throw new ArgumentNullException(nameof(dictName));
            }

            List<YLDictionaryItem> list = null;

            if (_dic == null)
            {
                _dic = new Dictionary<string, List<YLDictionaryItem>>();
            }
            else
            {
                _dic.TryGetValue(dictName, out list);
            }

            if (list == null)
            {
                _dic[dictName] = list = new List<YLDictionaryItem>();
            }

            list.Add(dicItem);

            return this;
        }

        /// <summary>
        /// 获取字典选项
        /// </summary>
        /// <param name="dictName">字典名</param>
        /// <param name="appendblank">是否附件空项</param>
        /// <param name="defaultValue">默认值(用于设置Selected)</param>
        public List<SelectItem> GetList(string dictName, bool appendblank, string defaultValue = "")
        {
            var list = new List<SelectItem>();

            if (appendblank == true)
            {
                list.Add(new SelectItem { Value = "", Text = @"---" });
            }

            if (_dic != null && _dic.TryGetValue(dictName, out var itemList))
            {
                list.AddRange(itemList.Select(n => new SelectItem
                {
                    Value = string.IsNullOrWhiteSpace(n.ShortName) ? n.Name : n.ShortName,
                    Text = n.Name,
                    Selected = n.Name == defaultValue
                }));
            }

            return list;
        }

        /// <summary>
        /// 是否有字典项
        /// </summary>
        public bool HasItems(string dictName)
        {
            return _dic != null && _dic.TryGetValue(dictName, out var itemList) ? itemList.Any() : false;
        }
    }
}