using LB_VisionProcesses.BarcodeReaders;
using System;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;

namespace LB_SmartVision.Forms.Pages.BarcodeReaderPage
{
    public partial class BarcodeReaderForm : Form
    {
        BarcodeReaderBase barcodeReader { get; set; }
        PictureBox pictureBox1 { get; set; }

        public BarcodeReaderForm()
        {
            InitializeComponent();
        }

        public BarcodeReaderForm(BarcodeReaderBase reader)
        {
            InitializeComponent();

            // 创建图像显示控件
            pictureBox1 = new PictureBox();
            pictureBox1.Dock = DockStyle.Fill;
            pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
            uiGroupBoxImage.Controls.Add(pictureBox1);

            if (reader == null)
                return;

            this.barcodeReader = reader;
            this.Text = reader.SN;

            // 添加品牌选项
            foreach (BarcodeReaderBrand brand in Enum.GetValues(typeof(BarcodeReaderBrand)))
            {
                if (brand != BarcodeReaderBrand.Unsupported)
                    uiComboBoxBrand.Items.Add(brand.ToString());
            }

            // 设置品牌
            uiComboBoxBrand.Text = reader.Brand.ToString();

            // 加载回调函数
            Subscribe();
        }

        private void BarcodeReaderForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (barcodeReader == null)
                return;

            barcodeReader.StopGrabbing();
            Unsubscribe();
        }

        public void Unsubscribe()
        {
            try
            {
                if (barcodeReader == null)
                    return;
                // 取消回调函数
                barcodeReader.BarcodeRead -= OnBarcodeRead;
            }
            catch (Exception ex)
            {
                // 记录错误信息
                Debug.WriteLine($"错误: {ex.Message}");
            }
        }

        public void Subscribe()
        {
            try
            {
                if (barcodeReader == null)
                    return;

                // 取消回调函数
                barcodeReader.BarcodeRead -= OnBarcodeRead;
                // 加载回调函数
                barcodeReader.BarcodeRead += OnBarcodeRead;
            }
            catch (Exception ex)
            {
                // 记录错误信息
                Debug.WriteLine($"错误: {ex.Message}");
            }
        }

        private void OnBarcodeRead(object sender, BarcodeEventArgs e)
        {
            if (e.Barcodes == null || e.Barcodes.Count == 0)
                return;

            if (this.InvokeRequired)
            {
                this.Invoke(new Action(() =>
                {
                    DisplayBarcodeResult(e);
                }));
            }
            else
            {
                DisplayBarcodeResult(e);
            }
        }

        private void DisplayBarcodeResult(BarcodeEventArgs e)
        {
            uiListBoxBarcodes.Items.Clear();
            if (e.BarcodeInfos != null && e.BarcodeInfos.Count > 0)
            {
                foreach (var info in e.BarcodeInfos)
                {
                    uiListBoxBarcodes.Items.Add(info.Text);
                }
            }

            if (e.Image != null)
            {
                // 创建图像副本进行绘制
                Bitmap drawImg = new Bitmap(e.Image);
                using (Graphics g = Graphics.FromImage(drawImg))
                {
                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
                    using (Pen pen = new Pen(Color.LimeGreen, 3))
                    using (SolidBrush brush = new SolidBrush(Color.LimeGreen))
                    using (Font font = new Font("Arial", 16, FontStyle.Bold))
                    {
                        foreach (var info in e.BarcodeInfos)
                        {
                            if (info.Points != null && info.Points.Length >= 4)
                            {
                                // 绘制框线
                                g.DrawPolygon(pen, info.Points);
                                // 绘制文本
                                Point textPos = info.Points[0];
                                textPos.Y -= 25;
                                g.DrawString(info.Text, font, brush, textPos);
                            }
                        }
                    }
                }

                // 释放旧图像
                var oldImg = pictureBox1.Image;
                pictureBox1.Image = drawImg;
                oldImg?.Dispose();
            }

            uiTextBoxResult.Text = $"读取到{e.BarcodeInfos.Count}个条码";
        }

        private void uiRadioButtonSoftTrigger_CheckedChanged(object sender, EventArgs e)
        {
            uiButtonSoftTrigger.Enabled = uiRadioButtonSoftTrigger.Checked;

            if (barcodeReader == null)
                return;

            barcodeReader.SetTriggerMode(uiRadioButtonSoftTrigger.Checked);
        }

        private void uiButtonStartGrabbing_Click(object sender, EventArgs e)
        {
            if (barcodeReader == null)
                return;

            if (barcodeReader.StartGrabbing())
            {
                uiButtonStartGrabbing.Enabled = false;
                uiButtonStopGrabbing.Enabled = true;
            }
        }

        private void uiButtonStopGrabbing_Click(object sender, EventArgs e)
        {
            if (barcodeReader == null)
                return;

            if (barcodeReader.StopGrabbing())
            {
                uiButtonStartGrabbing.Enabled = true;
                uiButtonStopGrabbing.Enabled = false;
            }
        }

        private void uiButtonSoftTrigger_Click(object sender, EventArgs e)
        {
            if (barcodeReader == null)
                return;

            barcodeReader.SoftTrigger();
        }

        private void uiButtonClear_Click(object sender, EventArgs e)
        {
            uiListBoxBarcodes.Items.Clear();
            uiTextBoxResult.Text = "";
            if (pictureBox1 != null)
                pictureBox1.Image = null;
        }
    }
}