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
    [JsonIgnore]
    public double? MarginLeft { get; set; }

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

    [JsonIgnore]
    public double? MarginTop { get; set; }

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

    public double? Width { get; set; }

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

    public double? Height { get; set; }

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

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

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

    #region Boundary
    [JsonIgnore]
    public double HorBoundary => Left + (Width ?? 0);

    [JsonIgnore]
    public double VerBoundary => Top + (Height ?? 0);
    #endregion

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

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

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

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

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

            if (Height == null && value.Height != null)
                Height = value.Height * HeightRatio;
        }
    }
};