using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing;
using ZedGraph;
using System.Drawing.Drawing2D;
using System.ComponentModel;

namespace ImpulseVision
{
    [ToolboxItem(true)]
    class FDProgressBar : Control
    {
        #region <Переменные>

        Animation ProgressAnim = new Animation();

        #endregion

        #region <Свойства>

        public Color BorderColor { get; set; } = FlatColors.GrayDark;
        public Color BackColorProgressLeft { get; set; } = FlatColors.Green;
        public Color BackColorProgressRight { get; set; } = FlatColors.Red;


        public int _Value { get; set; } = 0;
        public int Value
        {
            get => _Value;
            set
            {
                if (value >= ValueMinimum && value <= _ValueMaximum)
                {
                    _Value = value;
                    if (Animator.IsWork == false)
                    {
                        ProgressAnim.Value = _Value;
                        Invalidate();
                    }
                    else
                    {
                        ProgressAction(_Value);
                    }
                }
                else
                {
                    value = _Value;
                }
            }
        }
        public int _ValueMinimum { get; set; } = 0;

        public int ValueMinimum
        {
            get => _ValueMinimum;
            set
            {
                if(value < _ValueMaximum)
                {
                    _ValueMinimum = value;
                    if(_ValueMinimum > Value)
                    {
                        Value= _ValueMinimum;
                        Invalidate();
                    }
                }
                else
                {
                    value = _ValueMinimum;
                }
            }
        }
        public int _ValueMaximum { get; set; } = 100;
        public int ValueMaximum
        {
            get => _ValueMaximum;
            set
            {
                if(value > _ValueMinimum)
                {
                    _ValueMaximum = value;
                    Invalidate();

                }
                else
                {
                    value = _ValueMaximum;
                }
            }
        }

        public int Step { get; set; } = 10;
        #endregion
        public FDProgressBar()
        {
            SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.SupportsTransparentBackColor, true);

            DoubleBuffered = true;

            Size = new Size(200, 20);

            BackColor = FlatColors.GrayLight;
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            Graphics Graph = e.Graphics;
            Graph.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            //очистка холста
            Graph.Clear(Parent.BackColor);

            Rectangle RectBase = new Rectangle(0, 0, Width - 1, Height - 1);
            Rectangle RectProgress = new Rectangle(RectBase.X + 1, RectBase.Y + 1, CalculateProgressRectSize(RectBase) - 2, RectBase.Height - 2);

            //рисуем основу
            DrawBase(Graph, RectBase);

            //рисуем прогресс
            DrawProgress(Graph, RectProgress);
        }
        /// <summary>
        /// расчитывание значения свойства "Value" взависимости от ширины ProgressBar
        /// </summary>
        /// <returns></returns>
        private int CalculateProgressRectSize(Rectangle Rect)
        {
            int Margin = _ValueMaximum - ValueMinimum;
            return Rect.Width * (int)ProgressAnim.Value / Margin;
        }


        #region <Рисование объектов>

        /// <summary>
        /// Рисование основы
        /// </summary>
        private void DrawBase(Graphics graph,Rectangle rect)
        {
            graph.DrawRectangle(new Pen(BackColor), rect);
            graph.FillRectangle(new SolidBrush(BackColor), rect);
        }
        /// <summary>
        /// рисование ProgressBar
        /// </summary>
        private void DrawProgress(Graphics graph, Rectangle rectProgress)
        {
            //для градиента
            LinearGradientBrush LGB = new LinearGradientBrush(rectProgress, BackColorProgressLeft, BackColorProgressRight, 360);

            graph.DrawRectangle(new Pen(LGB), rectProgress);
            graph.FillRectangle(LGB, rectProgress);
        }
        #endregion

        #region <Запуск анимации>

        private void ProgressAction(int PIXELS)
        {
            ProgressAnim = new Animation("ProgressBar_" + Handle, Invalidate, ProgressAnim.Value, PIXELS);

            ProgressAnim.StepDivider = 8;
            Animator.Request(ProgressAnim, true);
        }
        #endregion
        #region <Public Методы>
        public bool PerformStep()
        {
            if(Value < ValueMaximum)
            {
                if(Value + Step >= ValueMaximum)
                {
                    Value = ValueMaximum;
                    return false;
                }
                else
                {
                    Value += Step;
                    return true;
                }
            }
            else
            {
                return false;
            }
        }

        public void ResetProgress()
        {
            Value = ValueMinimum;
        }

        #endregion
    }
}