using HandyControl.Controls;
using LiveCharts;
using Ping9719.WpfEx.Mvvm;
using SqlSugar;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace 智慧物流软件系统.ViewModel
{
    public class DataChartViewModel : BindableBase
    {
        #region 加载
        private bool isLoad;
        public bool IsLoad { get => isLoad; set { SetProperty(ref isLoad, value); } }
        #endregion

        #region 日期
        private List<int> year = new List<int>();
        /// <summary>
        /// 年
        /// </summary>
        public List<int> Year { get => year; set { SetProperty(ref year, value); } }

        private List<int> month = new List<int>();
        /// <summary>
        /// 月
        /// </summary>
        public List<int> Month { get => month; set { SetProperty(ref month, value); } }

        private int yearIndex;
        /// <summary>
        /// 年索引
        /// </summary>
        public int YearIndex { get => yearIndex; set { SetProperty(ref yearIndex, value); UpdataMonth(); } }

        private int monthIndex;
        /// <summary>
        /// 月索引
        /// </summary>
        public int MonthIndex { get => monthIndex; set { SetProperty(ref monthIndex, value); StatChart(); } }
        #endregion

        #region 图表
        public ChartValues<int> ChartValues1 { get; set; } = new ChartValues<int>();
        public ChartValues<int> ChartValues2 { get; set; } = new ChartValues<int>();
        public ChartValues<int> ChartValues3 { get; set; } = new ChartValues<int>();
        public Func<double, string> LabelFormatterX { get; set; } = value => $"{value}号";
        public Func<double, string> LabelFormatterY { get; set; } = value => $"{value}个";

        private IList<string> chartLabelsX;
        /// <summary>
        /// X轴轴信息
        /// </summary>
        public IList<string> ChartLabelsX { get => chartLabelsX; set { SetProperty(ref chartLabelsX, value); } }

        #endregion

        #region 方法
        /// <summary>
        /// 更新年
        /// </summary>
        public async void UpdataYear()
        {
            try
            {
                IsLoad = true;
                Year = await DataDb.db.Queryable<MyTestTable>()
                    .GroupBy(o => o.Time.Year)
                    .OrderByDescending(o => o.Time.Year)
                    .Select(o => o.Time.Year)
                    .ToListAsync();
            }
            catch (Exception ex)
            {
                Year = new List<int>();
                Growl.Error("刷新数据失败：" + ex.Message);
            }
            finally
            {
                YearIndex = Year.Any() ? 0 : -1;
            }
        }

        /// <summary>
        /// 更新月
        /// </summary>
        public async void UpdataMonth()
        {
            try
            {
                IsLoad = true;
                if (!Year.Any() || YearIndex < 0)
                    return;

                var dt1 = new DateTime(Year[YearIndex], 1, 1);
                var dt2 = dt1.AddYears(1);
                Month = await DataDb.db.Queryable<MyTestTable>()
                    .Where(o => o.Time > dt1 && o.Time < dt2)
                    .GroupBy(o => o.Time.Month)
                    .OrderBy(o => o.Time.Month)
                    .Select(o => o.Time.Month)
                    .ToListAsync();
            }
            catch (Exception ex)
            {
                Month = new List<int>();
                Growl.Error("刷新数据失败：" + ex.Message);
            }
            finally
            {
                MonthIndex = Month.Any() ? Month.Count - 1 : -1;
            }
        }

        public ICommand ButStatChartCommand { get => new DelegateCommand(ButStatChart); }
        /// <summary>
        /// 点击刷新
        /// </summary>
        public void ButStatChart()
        {
            if (IsLoad)
            {
                Growl.Info("有任务正在进行");
                return;
            }

            if (!Year.Any() || !Month.Any() || YearIndex < 0 || MonthIndex < 0)
            {
                Growl.Info("没有选择年份或月份");
                return;
            }

            StatChart();
        }

        /// <summary>
        /// 刷新统计信息
        /// </summary>
        public async void StatChart()
        {
            try
            {
                if (!Year.Any() || !Month.Any() || YearIndex < 0 || MonthIndex < 0)
                {
                    ChartValues1.Clear();
                    ChartValues2.Clear();
                    ChartValues3.Clear();
                    return;
                }

                IsLoad = true;
                await Task.Delay(200);

                var year = Year[YearIndex];
                var month = Month[MonthIndex];

                var dt1 = new DateTime(year, month, 1);
                var dt2 = dt1.AddMonths(1);

                //从数据库中查询、统计数量
                var dbdata = await DataDb.db.Queryable<MyTestTable>()
                .Where(o => o.Time > dt1 && o.Time < dt2)
                .GroupBy(o => o.Time.Day)
                .Select(o => new
                {
                    day = o.Time.Day,
                    count = SqlFunc.AggregateCount(o.Id),
                    okCount = SqlFunc.AggregateCount(o.Status == "合格" ? "" : null),
                    notCount = SqlFunc.AggregateCount(o.Status != "合格" ? "" : null),
                })
                .OrderBy(o => o.day)
                .ToListAsync();

                ChartLabelsX = dbdata.Select(o => o.day.ToString()).ToList();

                ChartValues1.Clear();
                ChartValues2.Clear();
                ChartValues3.Clear();

                ChartValues1.AddRange(dbdata.Select(o => o.count));
                ChartValues2.AddRange(dbdata.Select(o => o.okCount));
                ChartValues3.AddRange(dbdata.Select(o => o.notCount));
            }
            catch (Exception ex)
            {
                Growl.Error("刷新数据失败：" + ex.Message);
            }
            finally
            {
                IsLoad = false;
            }
        }
        #endregion
    }
}