using NPOI.SS.Formula.Functions;
using Prism.Events;
using Prism.Mvvm;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using TeamAAS_VP.Events;

namespace TeamAAS_VP.Controls
{
    /// <summary>
    /// UProgressBar.xaml 的交互逻辑
    /// </summary>
    public partial class UProgressBar : UserControl, IDialogAware, INotifyPropertyChanged
    {
        public struct ProgressParameter
        {
            public double Maximum;
            public double Minimum;
            public string SubTitle;
            public string Message;
            public double Value;
        }

        IEventAggregator eventAggregator;

        #region 属性

        private double maximum = 100;
        /// <summary>
        /// 进度最大值
        /// </summary>
        public double Maximum
        {
            get { return maximum; }
            set { SetProperty(ref maximum, value); }
        }

        private double minimum = 0;
        /// <summary>
        /// 进度最小值
        /// </summary>
        public double Minimum
        {
            get { return minimum; }
            set { SetProperty(ref minimum, value); }
        }

        private double _value = 0;
        /// <summary>
        /// 进度当前值
        /// </summary>
        public double Value
        {
            get { return _value; }
            set { SetProperty(ref _value, value); }
        }

        private string subTitle = "";
        /// <summary>
        /// 副标题
        /// </summary>
        public string SubTitle
        {
            get { return subTitle; }
            set { SetProperty(ref subTitle, value); }
        }

        private string message = "";
        /// <summary>
        /// 信息
        /// </summary>
        public string Message
        {
            get { return message; }
            set { SetProperty(ref message, value); }
        }

        public string Title => "";
        #endregion

        #region 命令

        #endregion

        #region 事件
        public event Action<IDialogResult> RequestClose;
        #endregion

        public UProgressBar(IEventAggregator ea)
        {
            eventAggregator = ea;
            InitializeComponent();
            DataContext = this;
            eventAggregator.GetEvent<ProgressNotification>().Subscribe(progressChanged);
        }

        #region 方法

        private void progressChanged(ProgressParameter obj)
        {
            if (obj.Value < obj.Minimum)
            {
                CloseDialog("True");
            }
            else
            {
                App.Current.Dispatcher.BeginInvoke(new Action(() => {
                    Minimum = obj.Minimum;
                    Maximum = obj.Maximum;
                    SubTitle = obj.SubTitle;
                    Message = obj.Message;
                    Value = obj.Value;
                }));
            }
        }

        protected virtual void CloseDialog(string parameter)
        {
            ButtonResult result = ButtonResult.None;

            if (parameter?.ToLower() == "true")
                result = ButtonResult.OK;
            else if (parameter?.ToLower() == "false")
                result = ButtonResult.Cancel;

            RaiseRequestClose(new DialogResult(result));
        }

        public virtual void RaiseRequestClose(IDialogResult dialogResult)
        {
            RequestClose?.Invoke(dialogResult);
        }

        public bool CanCloseDialog()
        {
            return true;
        }

        public void OnDialogClosed()
        {
            
        }

        public void OnDialogOpened(IDialogParameters parameters)
        {
            
        }

        #endregion

        #region 属性通知
        /// <summary>
        /// Occurs when a property value changes.
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;

        /// <summary>
        /// Checks if a property already matches a desired value. Sets the property and
        /// notifies listeners only when necessary.
        /// </summary>
        /// <typeparam name="T">Type of the property.</typeparam>
        /// <param name="storage">Reference to a property with both getter and setter.</param>
        /// <param name="value">Desired value for the property.</param>
        /// <param name="propertyName">Name of the property used to notify listeners. This
        /// value is optional and can be provided automatically when invoked from compilers that
        /// support CallerMemberName.</param>
        /// <returns>True if the value was changed, false if the existing value matched the
        /// desired value.</returns>
        protected virtual bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(storage, value)) return false;

            storage = value;
            RaisePropertyChanged(propertyName);

            return true;
        }

        /// <summary>
        /// Checks if a property already matches a desired value. Sets the property and
        /// notifies listeners only when necessary.
        /// </summary>
        /// <typeparam name="T">Type of the property.</typeparam>
        /// <param name="storage">Reference to a property with both getter and setter.</param>
        /// <param name="value">Desired value for the property.</param>
        /// <param name="propertyName">Name of the property used to notify listeners. This
        /// value is optional and can be provided automatically when invoked from compilers that
        /// support CallerMemberName.</param>
        /// <param name="onChanged">Action that is called after the property value has been changed.</param>
        /// <returns>True if the value was changed, false if the existing value matched the
        /// desired value.</returns>
        protected virtual bool SetProperty<T>(ref T storage, T value, Action onChanged, [CallerMemberName] string propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(storage, value)) return false;

            storage = value;
            onChanged?.Invoke();
            RaisePropertyChanged(propertyName);

            return true;
        }

        /// <summary>
        /// Raises this object's PropertyChanged event.
        /// </summary>
        /// <param name="propertyName">Name of the property used to notify listeners. This
        /// value is optional and can be provided automatically when invoked from compilers
        /// that support <see cref="CallerMemberNameAttribute"/>.</param>
        protected void RaisePropertyChanged([CallerMemberName] string propertyName = null)
        {
            OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
        }

        /// <summary>
        /// Raises this object's PropertyChanged event.
        /// </summary>
        /// <param name="args">The PropertyChangedEventArgs</param>
        protected virtual void OnPropertyChanged(PropertyChangedEventArgs args)
        {
            PropertyChanged?.Invoke(this, args);
        }
        #endregion
    }
}