using System.Drawing;
using System.Xml.Serialization;

namespace GeoSigma.SigmaDrawerStyle
{
    /// <summary>
    /// 字体
    /// </summary>
    public class WellFontEx
    {
        /// <summary>字体名称，如“宋体”</summary>
        [XmlAttribute("FN")]
        public string FontName { get; set; }

        /// <summary>宽</summary>
        [XmlAttribute("W")]
        public float Width { get; set; }

        /// <summary>高</summary>
        [XmlAttribute("H")]
        public float Height { get; set; }

        /// <summary>粗细</summary>
        [XmlAttribute("B")]
        public int Weight { get; set; }

        /// <summary>斜体</summary>
        [XmlAttribute("I")]
        public bool Italic { get; set; }

        /// <summary>下划线</summary>
        [XmlAttribute("U")]
        public bool Underline { get; set; }

        /// <summary>
        /// 删除线
        /// </summary>
        [XmlAttribute("S")]
        public bool StrikeOut { get; set; }

        /// <summary>
        /// 间距
        /// </summary>
        [XmlAttribute("PF")]
        public double Space { get; set; }

        /// <summary>
        /// 用于 xml 序列化反序列化，它不支持 Color，这里玩个技巧
        /// </summary>
        [XmlAttribute("C")]
        public string FontColorString
        {
            get => ColorTranslator.ToHtml(FontColor);
            set => FontColor = ColorTranslator.FromHtml(value);
        }

        /// <summary>字体颜色</summary>
        [XmlIgnore]
        public Color FontColor { get; set; }

        /// <summary>
        /// 显示方式：0常规，1上标，2下标
        /// </summary>
        [XmlAttribute("SP")]
        public int Script { get; set; }

        /// <summary>
        /// 字体内部文本内容
        /// </summary>
        [XmlText]
        public string Text { get; set; }

        /// <inheritdoc/>
        public override string ToString()
        {
            return FontName;
        }

        /// <summary>
        /// 转换到 Font
        /// </summary>
        /// <param name="fontEx">封装的字体对象</param>
        /// <returns>winform 内置字体对象</returns>
        public static Font ToFont(WellFontEx fontEx)
        {
            FontStyle style = FontStyle.Regular;

            // 粗体，暂时参照着 LogFont.cs 里面写的
            if (fontEx.Weight != 800)
            {
                style |= FontStyle.Bold;
            }

            if (fontEx.Italic)
            {
                style |= FontStyle.Italic;
            }

            if (fontEx.Underline)
            {
                style |= FontStyle.Underline;
            }

            if (fontEx.StrikeOut)
            {
                style |= FontStyle.Strikeout;
            }

            var font = new Font(fontEx.FontName ?? "宋体", fontEx.Height/ 2.8f, style);

            return font;
        }

        /// <summary>
        /// 从 winform 字体对象转换为封装的字体对象
        /// </summary>
        /// <param name="font">winform 字体对象</param>
        /// <returns>封装的字体对象</returns>
        public static WellFontEx FromFont(Font font)
        {
            var fontEx = new WellFontEx();

            fontEx.FontName = font.Name;
            fontEx.Width = font.Size * 0.4f * 2.8f; // 我也不知道为什么是乘0.4 (乘以系数2.8正好接近井模块中的字体 gaofeng)
            fontEx.Height = font.Size * 2.8f;
            fontEx.Weight = font.Bold ? 800 : 0;
            fontEx.Italic = font.Italic;
            fontEx.Underline = font.Underline;
            fontEx.StrikeOut = font.Strikeout;

            return fontEx;
        }
    }
}