using RealTimeGraphX.EventArguments;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace RealTimeGraphX
{
    /// <summary>
    /// Represents a graph renderer that can be connected as an output of an <see cref="IGraphController"/>.
    /// The graph renderer receives data points from the graph controller and prepares them for drawing.
    /// The output of a graph renderer should be of type <see cref="IGraphPainter"/>.
    /// </summary>
    /// <typeparam name="TDataSeries">The type of the graph data series.</typeparam>
    /// <seealso cref="RealTimeGraphX.IGraphInputComponent{RealTimeGraphX.IGraphController}" />
    /// <seealso cref="RealTimeGraphX.IGraphOutputComponent{RealTimeGraphX.IGraphPainter}" />
    public interface IGraphRenderer<TDataSeries> : IGraphInputComponent<IGraphController<TDataSeries>>, IGraphOutputComponent<IGraphPainter<TDataSeries>> where TDataSeries : IGraphDataSeries
    {
        #region Events

        /// <summary>
        /// Occurs when the current effective x-axis minimum/maximum has changed.
        /// </summary>
        event EventHandler<RangeChangedEventArgs> EffectiveRangeXChanged;

        /// <summary>
        /// Occurs when the current effective y-axis minimum/maximum has changed.
        /// </summary>        
        event EventHandler<RangeChangedEventArgs> EffectiveRangeYChanged;

        #endregion

        #region Properties

        /// <summary>
        /// Gets the current effective x-axis minimum.
        /// </summary>
        GraphDataPointBase EffectiveMinimumX { get; }

        /// <summary>
        /// Gets the current effective x-axis maximum.
        /// </summary>
        GraphDataPointBase EffectiveMaximumX { get; }

        /// <summary>
        /// Gets the current effective y-axis minimum.
        /// </summary>
        GraphDataPointBase EffectiveMinimumY { get; }

        /// <summary>
        /// Gets the current effective y-axis maximum.
        /// </summary>
        GraphDataPointBase EffectiveMaximumY { get; }

        /// <summary>
        /// Gets or sets the renderer refresh rate.
        /// Higher rate requires more CPU time.
        /// </summary>
        TimeSpan RefreshRate { get; set; }

        /// <summary>
        /// Gets the current data point x position.
        /// </summary>
        double CurrentXPosition { get; }

        /// <summary>
        /// Gets or sets a value indicating whether to pause the rendering.
        /// </summary>
        bool IsPaused { get; set; }

        #endregion

        #region Methods

        /// <summary>
        /// Invalidates the graph.
        /// </summary>
        void Invalidate();

        /// <summary>
        /// Clears the graph data.
        /// </summary>
        void Clear();

        #endregion
    }

    /// <summary>
    /// Represents a graph renderer that can be connected as an output of an <see cref="IGraphController"/>.
    /// The graph renderer receives data points from the graph controller and prepares them for drawing.
    /// The output of a graph renderer should be of type <see cref="IGraphPainter"/>.
    /// </summary>
    /// <typeparam name="TDataSeries">The type of the graph data series.</typeparam>
    /// <typeparam name="XDataPoint">The type of the x-axis data point.</typeparam>
    /// <typeparam name="YDataPoint">The type of the y-axis data point.</typeparam>
    /// <seealso cref="RealTimeGraphX.IGraphInputComponent{RealTimeGraphX.IGraphController}" />
    /// <seealso cref="RealTimeGraphX.IGraphOutputComponent{RealTimeGraphX.IGraphPainter}" />
    public interface IGraphRenderer<TDataSeries, XDataPoint, YDataPoint> : IGraphRenderer<TDataSeries>, IGraphInputComponent<IGraphController<TDataSeries, XDataPoint, YDataPoint>> where XDataPoint : GraphDataPointBase where YDataPoint : GraphDataPointBase where TDataSeries : IGraphDataSeries
    {
        #region Methods

        /// <summary>
        /// Renders the specified data points collection.
        /// • The number of data series of x and y must match.
        /// • The number of x and y collections must match.
        /// • The number of x and y data points must match.
        /// </summary>
        /// <param name="seriesCollection">The series collection.</param>
        /// <param name="xxxx">The x-axis series collection.</param>
        /// <param name="yyyy">The y-axis series collection.</param>
        void Render(IEnumerable<TDataSeries> seriesCollection, IEnumerable<IEnumerable<XDataPoint>> xxxx, IEnumerable<IEnumerable<YDataPoint>> yyyy);

        /// <summary>
        /// Gets the connected input controller.
        /// </summary>
        new IGraphController<TDataSeries, XDataPoint, YDataPoint> Input { get; }

        /// <summary>
        /// Occurs when the connected input controller has changed.
        /// </summary>
        new event EventHandler<InputChangedEventArgs<IGraphController<TDataSeries, XDataPoint, YDataPoint>>> InputChanged;

        #endregion
    }
}