using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace AccompanyingAssistant {
    public class BubbleForm : Form {
        private string _message = "";
        private int cornerRadius = 12;
        private int tailHeight = 10;
        private Color bubbleColor = Color.FromArgb(255, 255, 230);
        private Color borderColor = Color.FromArgb(220, 220, 200);
        private Font messageFont = new Font("微软雅黑", 9);

        public string Message {
            get { return _message; }
            set {
                _message = value;
                CalculateSize();
                Invalidate();
            }
        }

        public BubbleForm() {
            this.FormBorderStyle = FormBorderStyle.None;
            this.ShowInTaskbar = false;
            this.StartPosition = FormStartPosition.Manual;
            this.Padding = new Padding(12, 12, 12, 12 + tailHeight);
            this.BackColor = Color.Magenta;
            this.TransparencyKey = Color.Magenta;
            this.DoubleBuffered = true;

            // 初始大小
            this.Size = new Size(200, 100);

            // 添加关闭按钮
            var closeButton = new Button();
            closeButton.Text = "×";
            closeButton.FlatStyle = FlatStyle.Flat;
            closeButton.FlatAppearance.BorderSize = 0;
            closeButton.BackColor = Color.Transparent;
            closeButton.ForeColor = Color.Gray;
            closeButton.Font = new Font("Arial", 8, FontStyle.Bold);
            closeButton.Size = new Size(20, 20);
            closeButton.Location = new Point(this.Width - closeButton.Width - 5, 5);
            closeButton.Click += (s, e) => this.Hide();
            this.Controls.Add(closeButton);
        }
        public void UpdateSize() {
            CalculateSize();
        }

        private void CalculateSize() {
            using (Graphics g = this.CreateGraphics()) {
                // 增加最大宽度限制，防止气泡过宽
                int maxWidth = Screen.PrimaryScreen.WorkingArea.Width / 3;
                SizeF textSize = g.MeasureString(_message, messageFont, maxWidth);

                int newWidth = (int)Math.Max(150, Math.Min(maxWidth, textSize.Width + this.Padding.Horizontal));
                int newHeight = (int)(textSize.Height + this.Padding.Vertical);

                this.Size = new Size(newWidth, newHeight);

                if (this.Controls.Count > 0) {
                    this.Controls[0].Location = new Point(this.Width - 25, 5);
                }
            }
        }
      

        protected override void OnPaint(PaintEventArgs e) {
            base.OnPaint(e);
            Graphics g = e.Graphics;
            g.SmoothingMode = SmoothingMode.AntiAlias;

            // 创建气泡路径
            GraphicsPath path = new GraphicsPath();
            Rectangle mainRect = new Rectangle(0, 0, this.Width, this.Height - tailHeight);

            // 绘制圆角矩形主体
            path.AddArc(mainRect.X, mainRect.Y, cornerRadius, cornerRadius, 180, 90);
            path.AddArc(mainRect.X + mainRect.Width - cornerRadius, mainRect.Y, cornerRadius, cornerRadius, 270, 90);
            path.AddArc(mainRect.X + mainRect.Width - cornerRadius, mainRect.Y + mainRect.Height - cornerRadius, cornerRadius, cornerRadius, 0, 90);

            // 添加尾巴
            int tailWidth = 20;
            int tailX = this.Width / 2 - tailWidth / 2;
            path.AddLine(mainRect.X + mainRect.Width - cornerRadius, mainRect.Y + mainRect.Height, tailX + tailWidth, mainRect.Y + mainRect.Height);
            path.AddLine(tailX + tailWidth, mainRect.Y + mainRect.Height, this.Width / 2, this.Height);
            path.AddLine(this.Width / 2, this.Height, tailX, mainRect.Y + mainRect.Height);
            path.AddLine(tailX, mainRect.Y + mainRect.Height, mainRect.X + cornerRadius, mainRect.Y + mainRect.Height);

            path.AddArc(mainRect.X, mainRect.Y + mainRect.Height - cornerRadius, cornerRadius, cornerRadius, 90, 90);

            // 填充气泡
            using (Brush bubbleBrush = new SolidBrush(bubbleColor)) {
                g.FillPath(bubbleBrush, path);
            }

            // 绘制边框
            using (Pen borderPen = new Pen(borderColor, 1)) {
                g.DrawPath(borderPen, path);
            }

            // 绘制文本
            using (Brush textBrush = new SolidBrush(Color.Black)) {
                g.DrawString(_message, messageFont, textBrush,
                    new RectangleF(
                        this.Padding.Left,
                        this.Padding.Top,
                        this.Width - this.Padding.Horizontal,
                        this.Height - this.Padding.Vertical));
            }
        }

        private void InitializeComponent() {
            this.SuspendLayout();
            // 
            // BubbleForm
            // 
            this.ClientSize = new System.Drawing.Size(284, 261);
            this.Name = "BubbleForm";
            this.ResumeLayout(false);

        }
    }
}