using System.Text.Json.Serialization;

namespace EnvelopeGenerator.Web.Models;

public record Annotation
{
    public required string Name { get; init; }

    #region Bound Annotation
    [JsonIgnore]
    public string? HorBoundAnnotName { get; init; }

    [JsonIgnore]
    public string? VerBoundAnnotName { get; init; }
    #endregion

    #region Layout
    internal double _marginLeft = default;

    internal double _marginTop = default;

    internal double _width = default;

    internal double _height = default;

    [JsonIgnore]
    public double MarginLeft
    {
        get => _marginLeft;
        init => _marginLeft = value;
    }

    [JsonIgnore]
    public double MarginLeftRatio { get; init; } = 1;

    [JsonIgnore]
    public double MarginTop
    {
        get => _marginTop;
        init => _marginTop = value;
    }

    [JsonIgnore]
    public double MarginTopRatio { get; init; } = 1;

    public double Width
    {
        get => _width;
        init => _width = value;
    }

    [JsonIgnore]
    public double WidthRatio { get; init; } = 1;

    public double Height
    {
        get => _height;
        init => _height = value;
    }

    [JsonIgnore]
    public double HeightRatio { get; init; } = 1;
    #endregion

    #region Position
    public double Left => MarginLeft + (HorBoundAnnot?.HorBoundary ?? 0);

    public double Top => MarginTop + (VerBoundAnnot?.VerBoundary ?? 0);
    #endregion

    #region Boundary
    [JsonIgnore]
    public double HorBoundary => Left + Width;

    [JsonIgnore]
    public double VerBoundary => Top + Height;
    #endregion

    #region BoundAnnot
    [JsonIgnore]
    public Annotation? HorBoundAnnot { get; set; }

    [JsonIgnore]
    public Annotation? VerBoundAnnot { get; set; }
    #endregion

    [JsonIgnore]
    internal Annotation Default 
    { 
        set 
        {
            // To set default value, annotation must have default (0) value but default must has non-default value
            if (_marginLeft == default && value.MarginLeft != default)
                _marginLeft = value.MarginLeft * MarginLeftRatio;

            if (_marginTop == default && value.MarginTop != default)
                _marginTop = value.MarginTop * MarginTopRatio;

            if (_width == default && value.Width != default)
                _width = value.Width * WidthRatio;

            if (_height == default && value.Height != default)
                _height = value.Height * HeightRatio;

            ClientCoefficient = value.ClientCoefficient;
        }
    }

    [JsonIgnore]
    public double ClientCoefficient { get; set; } = 1;
};