using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Threading.Tasks;
using System.Web.Mvc;
using WeOnlineApp.BaseInfo;

namespace WeOnlineApp.CommonManager.States
{
    public sealed class NullStatesManager : IStatesManager
    {
        public static NullStatesManager Instance { get; } = new NullStatesManager();
        public Task<List<SelectListItem>> GetSelectListAsync(QueryStateDisplayValue input, params string[] codeFilter)
        {
            return Task.FromResult(new List<SelectListItem>());
        }

        public Task<List<SelectListItem>> GetSelectListAsync(string tableName, string columnName, params string[] codeFilter)
        {
            return Task.FromResult(new List<SelectListItem>());
        }

        public Task<string> GetSelectListStrAsync(QueryStateDisplayValue input, params string[] codeFilter)
        {
            return Task.FromResult("");
        }

        public Task<string> GetSelectListStrAsync(string tableName, string columnName, params string[] codeFilter)
        {
            return Task.FromResult("");
        }

        public Task<List<SelectListItem>> GetSelectListReversalAsync(QueryStateDisplayValue input, params string[] codeFilter)
        {
            return Task.FromResult(new List<SelectListItem>());
        }

        public Task<List<SelectListItem>> GetSelectListReversalAsync(string tableName, string columnName, params string[] codeFilter)
        {
            return Task.FromResult(new List<SelectListItem>());
        }

        public Task<string> GetSelectListStrsReversalAsync(QueryStateDisplayValue input, params string[] codeFilter)
        {
            return Task.FromResult("");
        }

        public Task<string> GetSelectListStrsReversalAsync(string tableName, string columnName, params string[] codeFilter)
        {
            return Task.FromResult("");
        }

        public Task<List<SelectListItem>> GetSelectListAsync(QueryStateDisplayValue input, Expression<Func<SysState, bool>> exp = null)
        {
            return Task.FromResult(new List<SelectListItem>());
        }

        public Task<List<SelectListItem>> GetSelectListAsync(string tableName, string columnName, Expression<Func<SysState, bool>> exp = null)
        {
            return Task.FromResult(new List<SelectListItem>());
        }

        public Task<string> GetSelectListStrAsync(QueryStateDisplayValue input, Expression<Func<SysState, bool>> exp = null)
        {
            return Task.FromResult("");
        }

        public Task<string> GetSelectListStrAsync(string tableName, string columnName, Expression<Func<SysState, bool>> exp = null)
        {
            return Task.FromResult("");
        }

        public Task<List<StateDisplayDto>> GetStateListAsync(QueryStateDisplayValue input, Expression<Func<SysState, bool>> exp = null)
        {
            return Task.FromResult(new List<StateDisplayDto>());
        }

        public Task<List<StateDisplayDto>> GetStateListAsync(string tableName, string columnName, Expression<Func<SysState, bool>> exp = null)
        {
            return Task.FromResult(new List<StateDisplayDto>());
        }

        public Task<List<StateDisplayDto>> GetStateListAsync(string tableName, string columnName, params string[] codeFilter)
        {
            return Task.FromResult(new List<StateDisplayDto>());
        }

        public Task<List<StateDisplayDto>> GetStateListReversalAsync(string tableName, string columnName, params string[] codeFilter)
        {
            return Task.FromResult(new List<StateDisplayDto>());
        }

        public Task<string> GetDisplayValueAsync(QueryStateDisplayValue input)
        {
            return Task.FromResult("");
        }

        public Task<string> GetDisplayValueAsync(string tableName, string columnName, string codeValue)
        {
            return Task.FromResult("");
        }
    }
}