using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using LB_VisionProcesses.BarcodeReaders;

namespace LB_VisionProcesses.BarcodeReaders
{
    /// <summary>
    /// 读码器配置与测试窗体
    /// </summary>
    public partial class BarcodeReaderForm : Form
    {
        private IBarcodeReader _reader;
        private string _currentSN;
        private LB_VisionProcesses.Processes.BarcodeReaderProcess _process;
        private string _processPath;

        public BarcodeReaderForm()
        {
            InitializeComponent();
        }

        public BarcodeReaderForm(LB_VisionProcesses.Processes.BarcodeReaderProcess process, string processPath)
        {
            InitializeComponent();
            _process = process;
            _processPath = processPath;

            // 加载流程参数到 UI
            if (_process.Params.Inputs.ContainsKey("设备品牌"))
                cmbBrand.Text = _process.Params.Inputs["设备品牌"].ToString();
            if (_process.Params.Inputs.ContainsKey("设备SN"))
                cmbSN.Text = _process.Params.Inputs["设备SN"].ToString();
            if (_process.Params.Inputs.ContainsKey("触发模式"))
                radSoftTrigger.Checked = _process.Params.Inputs["触发模式"].ToString() == "软触发";
            if (_process.Params.Inputs.ContainsKey("超时时间"))
                txtTimeout.Text = _process.Params.Inputs["超时时间"].ToString();
        }

        private void BarcodeReaderForm_Load(object sender, EventArgs e)
        {
            // 初始化品牌列表
            cmbBrand.Items.Clear();
            foreach (var brand in Enum.GetValues(typeof(BarcodeReaderBrand)))
            {
                if ((BarcodeReaderBrand)brand != BarcodeReaderBrand.Unsupported)
                {
                    cmbBrand.Items.Add(brand);
                }
            }

            if (cmbBrand.Items.Count > 0)
                cmbBrand.SelectedIndex = 0;

            UpdateUIStatus();
        }

        private void btnRefresh_Click(object sender, EventArgs e)
        {
            try
            {
                if (cmbBrand.SelectedItem == null) return;

                var brand = (BarcodeReaderBrand)cmbBrand.SelectedItem;
                using (var tempReader = BarcodeReaderFactory.CreateReader(brand))
                {
                    var devices = tempReader.GetDeviceList();
                    cmbSN.Items.Clear();
                    if (devices != null && devices.Count > 0)
                    {
                        cmbSN.Items.AddRange(devices.ToArray());
                        cmbSN.SelectedIndex = 0;
                    }
                }
                lblStatus.Text = $"设备列表已刷新，找到 {cmbSN.Items.Count} 个设备";
            }
            catch (Exception ex)
            {
                MessageBox.Show($"刷新设备列表失败: {ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void btnOpen_Click(object sender, EventArgs e)
        {
            try
            {
                if (cmbSN.SelectedItem == null && string.IsNullOrEmpty(cmbSN.Text))
                {
                    MessageBox.Show("请选择或输入设备序列号");
                    return;
                }

                _currentSN = cmbSN.Text;
                var brand = (BarcodeReaderBrand)cmbBrand.SelectedItem;

                if (_reader != null)
                {
                    _reader.BarcodeRead -= Reader_BarcodeRead;
                    _reader.Dispose();
                }

                _reader = BarcodeReaderFactory.CreateReader(brand);
                _reader.BarcodeRead += Reader_BarcodeRead;

                if (_reader.Open(_currentSN))
                {
                    lblStatus.Text = $"设备 {_currentSN} 已打开";
                    UpdateUIStatus();
                }
                else
                {
                    MessageBox.Show("设备打开失败，请检查连接或占用状态");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"打开设备异常: {ex.Message}");
            }
        }

        private void btnClose_Click(object sender, EventArgs e)
        {
            if (_reader != null)
            {
                _reader.Close();
                lblStatus.Text = "设备已关闭";
                UpdateUIStatus();
            }
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            if (_reader != null && _reader.IsConnected)
            {
                // 设置触发模式（根据 UI 选择）
                _reader.SetTriggerMode(radSoftTrigger.Checked);
                
                if (_reader.StartGrabbing())
                {
                    lblStatus.Text = "采集已开始";
                    UpdateUIStatus();
                }
            }
        }

        private void btnStop_Click(object sender, EventArgs e)
        {
            if (_reader != null && _reader.IsGrabbing)
            {
                if (_reader.StopGrabbing())
                {
                    lblStatus.Text = "采集已停止";
                    UpdateUIStatus();
                }
            }
        }

        private void btnSoftTrigger_Click(object sender, EventArgs e)
        {
            if (_reader != null && _reader.IsGrabbing)
            {
                _reader.SoftTrigger();
                lblStatus.Text = "已执行软触发";
            }
            else
            {
                lblStatus.Text = "请先开始采集再执行触发";
            }
        }

        private void radTrigger_CheckedChanged(object sender, EventArgs e)
        {
            if (_reader != null && _reader.IsConnected)
            {
                _reader.SetTriggerMode(radSoftTrigger.Checked);
                lblStatus.Text = radSoftTrigger.Checked ? "已切换至软触发模式" : "已切换至硬触发/自动模式";
            }
        }

        private void Reader_BarcodeRead(object sender, BarcodeEventArgs e)
        {
            // 异步更新 UI
            if (this.InvokeRequired)
            {
                this.BeginInvoke(new Action<object, BarcodeEventArgs>(Reader_BarcodeRead), sender, e);
                return;
            }

            try
            {
                // 更新结果列表
                lstBarcodes.Items.Clear();
                if (e.Barcodes != null && e.Barcodes.Count > 0)
                {
                    foreach (var code in e.Barcodes)
                    {
                        lstBarcodes.Items.Add($"{DateTime.Now:HH:mm:ss} - {code}");
                    }
                }
                else
                {
                    lstBarcodes.Items.Add($"{DateTime.Now:HH:mm:ss} - 未读到条码");
                }

                // 更新预览图像
                if (e.Image != null)
                {
                    // 释放旧图像，防止内存泄漏
                    var oldImg = picPreview.Image;
                    picPreview.Image = new Bitmap(e.Image); // 拷贝一份防止被 SDK 内部释放
                    oldImg?.Dispose();
                }
            }
            catch (Exception ex)
            {
                // 静默处理 UI 更新异常
                Console.WriteLine($"UI更新异常: {ex.Message}");
            }
        }

        private void UpdateUIStatus()
        {
            bool isConnected = _reader?.IsConnected ?? false;
            bool isGrabbing = _reader?.IsGrabbing ?? false;

            btnOpen.Enabled = !isConnected;
            btnClose.Enabled = isConnected;
            cmbBrand.Enabled = !isConnected;
            cmbSN.Enabled = !isConnected;
            btnRefresh.Enabled = !isConnected;

            btnStart.Enabled = isConnected && !isGrabbing;
            btnStop.Enabled = isGrabbing;
            btnSoftTrigger.Enabled = isGrabbing && radSoftTrigger.Checked;
            
            grpParams.Enabled = isConnected;
        }

        private void BarcodeReaderForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            // 关闭前保存参数到流程
            if (_process != null)
            {
                _process.Params.Inputs["设备品牌"] = cmbBrand.Text;
                _process.Params.Inputs["设备SN"] = cmbSN.Text;
                _process.Params.Inputs["触发模式"] = radSoftTrigger.Checked ? "软触发" : "硬触发";
                if (int.TryParse(txtTimeout.Text, out int timeout))
                    _process.Params.Inputs["超时时间"] = timeout;

                _process.Save(_processPath);
            }

            if (_reader != null)
            {
                if (_reader.IsGrabbing) _reader.StopGrabbing();
                _reader.Close();
                _reader.BarcodeRead -= Reader_BarcodeRead;
                _reader.Dispose();
                _reader = null;
            }
        }
    }
}