using System.Diagnostics.CodeAnalysis;
using InnovEnergy.Lib.Units;
using InnovEnergy.Lib.Utils;


namespace InnovEnergy.App.SaliMax;

public static class Flow
{
    private static readonly String RightArrowChar = ">";
    private static readonly String LeftArrowChar  = "<";
    private static readonly String DownArrowChar  = "V";
    private static readonly String UpArrowChar    = "^";

    public static TextBlock Horizontal(Unit amount) => Horizontal(amount, 10);

    public static TextBlock Horizontal(Unit amount, Int32 width)
    {
        var label     = amount.ToDisplayString();
        var arrowChar = amount.Value < 0 ? LeftArrowChar : RightArrowChar;
        var arrow     = Enumerable.Repeat(arrowChar, width).Join();

        // note : appending "fake label" below to make it vertically symmetric
        return TextBlock.AlignCenterHorizontal(label, arrow, ""); 
    }

    public static TextBlock Vertical(Unit amount) => Vertical(amount, 4);

    [SuppressMessage("ReSharper", "PossibleMultipleEnumeration")]
    [SuppressMessage("ReSharper", "CoVariantArrayConversion")]
    public static TextBlock Vertical(Unit amount, Int32 height)
    {
        var label     = amount.ToDisplayString();
        var arrowChar = amount.Value < 0 ? UpArrowChar : DownArrowChar;
        var halfArrow = Enumerable.Repeat(arrowChar, height/2);
        
        var lines = halfArrow
                   .Append(label)
                   .Concat(halfArrow)
                   .ToArray(height / 2 * 2 + 1);
        
        return TextBlock.AlignCenterHorizontal(lines);
    }
}