using System;
using System.Drawing;
using System.Windows.Forms;

namespace MesWork.Pages
{
    /// <summary>
    /// 系统设置页面 — 扫码枪连接管理
    /// </summary>
    public partial class UC_SystemSettings : UserControl
    {
        // OP10 控件
        private ComboBox cmb_Com1;
        private Button btn_Connect1, btn_Disconnect1, btn_ManualSend1;
        private Label lbl_Status1, lbl_ScanTime1;
        private TextBox txt_Barcode1;

        // OP20 控件
        private ComboBox cmb_Com2;
        private Button btn_Connect2, btn_Disconnect2, btn_ManualSend2;
        private Label lbl_Status2, lbl_ScanTime2;
        private TextBox txt_Barcode2;

        public UC_SystemSettings()
        {
            InitializeComponent();

            if (BarcodeManager.IsEnabled)
            {
                BuildScannerPanel(grp_Scanner1, "OP10", ref cmb_Com1, ref lbl_Status1, ref txt_Barcode1, ref lbl_ScanTime1,
                    ref btn_Connect1, ref btn_Disconnect1, ref btn_ManualSend1);
                BuildScannerPanel(grp_Scanner2, "OP20", ref cmb_Com2, ref lbl_Status2, ref txt_Barcode2, ref lbl_ScanTime2,
                    ref btn_Connect2, ref btn_Disconnect2, ref btn_ManualSend2);
                timer_Refresh.Start();
            }
            else
            {
                BuildScannerPanel(grp_Scanner1, "OP10", ref cmb_Com1, ref lbl_Status1, ref txt_Barcode1, ref lbl_ScanTime1,
                    ref btn_Connect1, ref btn_Disconnect1, ref btn_ManualSend1);
                BuildScannerPanel(grp_Scanner2, "OP20", ref cmb_Com2, ref lbl_Status2, ref txt_Barcode2, ref lbl_ScanTime2,
                    ref btn_Connect2, ref btn_Disconnect2, ref btn_ManualSend2);
                grp_Scanner1.Enabled = false;
                grp_Scanner2.Enabled = false;
            }
        }

        /// <summary>
        /// 动态构建单个扫码枪面板的控件
        /// </summary>
        private void BuildScannerPanel(GroupBox grp, string opName,
            ref ComboBox cmb, ref Label lblStatus, ref TextBox txtBar, ref Label lblTime,
            ref Button btnConn, ref Button btnDisc, ref Button btnSend)
        {
            var normalFont = new Font("微软雅黑", 10F);
            var boldFont = new Font("微软雅黑", 10F, FontStyle.Bold);
            int y1 = 35, y2 = 75, y3 = 115;

            // Row 1: COM口选择 + 连接/断开
            var lblCom = new Label { Text = "COM口:", Font = normalFont, ForeColor = Color.FromArgb(55, 65, 81),
                Location = new Point(20, y1 + 4), AutoSize = true };
            grp.Controls.Add(lblCom);

            cmb = new ComboBox { Font = normalFont, Location = new Point(90, y1), Size = new Size(110, 28),
                DropDownStyle = ComboBoxStyle.DropDownList };
            RefreshComPorts(cmb, opName);
            grp.Controls.Add(cmb);

            // 局部变量捕获（ref参数不能在lambda中使用）
            var localCmb = cmb;
            var localTxtBar = txtBar;

            btnConn = new Button
            {
                Text = "🔗 连接", Font = boldFont, Size = new Size(90, 30), Location = new Point(215, y1 - 2),
                BackColor = Color.FromArgb(74, 144, 217), ForeColor = Color.White,
                FlatStyle = FlatStyle.Flat, Cursor = Cursors.Hand
            };
            btnConn.FlatAppearance.BorderSize = 0;
            btnConn.Click += (s, e) => DoConnect(opName, localCmb);
            grp.Controls.Add(btnConn);

            btnDisc = new Button
            {
                Text = "⛔ 断开", Font = boldFont, Size = new Size(90, 30), Location = new Point(315, y1 - 2),
                BackColor = Color.FromArgb(239, 68, 68), ForeColor = Color.White,
                FlatStyle = FlatStyle.Flat, Cursor = Cursors.Hand
            };
            btnDisc.FlatAppearance.BorderSize = 0;
            btnDisc.Click += (s, e) => DoDisconnect(opName);
            grp.Controls.Add(btnDisc);

            // 刷新COM口列表按钮
            var btnRefresh = new Button
            {
                Text = "🔄", Font = normalFont, Size = new Size(36, 30), Location = new Point(415, y1 - 2),
                FlatStyle = FlatStyle.Flat, Cursor = Cursors.Hand,
                BackColor = Color.FromArgb(229, 231, 235)
            };
            btnRefresh.FlatAppearance.BorderSize = 0;
            btnRefresh.Click += (s, e) => RefreshComPorts(localCmb, opName);
            grp.Controls.Add(btnRefresh);

            lblStatus = new Label { Text = "● 未连接", Font = boldFont, ForeColor = Color.FromArgb(156, 163, 175),
                Location = new Point(470, y1 + 4), AutoSize = true };
            grp.Controls.Add(lblStatus);

            // Row 2: 最近码值 + 手动发送
            var lblBar = new Label { Text = "码值:", Font = normalFont, ForeColor = Color.FromArgb(55, 65, 81),
                Location = new Point(20, y2 + 4), AutoSize = true };
            grp.Controls.Add(lblBar);

            txtBar = new TextBox { Font = normalFont, Location = new Point(90, y2), Size = new Size(300, 28),
                BorderStyle = BorderStyle.FixedSingle };
            localTxtBar = txtBar; // 更新局部变量
            grp.Controls.Add(txtBar);

            btnSend = new Button
            {
                Text = "📤 手动发送", Font = boldFont, Size = new Size(120, 30), Location = new Point(405, y2 - 2),
                BackColor = Color.FromArgb(5, 150, 105), ForeColor = Color.White,
                FlatStyle = FlatStyle.Flat, Cursor = Cursors.Hand
            };
            btnSend.FlatAppearance.BorderSize = 0;
            btnSend.Click += (s, e) => DoManualSend(opName, localTxtBar);
            grp.Controls.Add(btnSend);

            // Row 3: 扫码时间
            var lblTimeLbl = new Label { Text = "扫码时间:", Font = normalFont, ForeColor = Color.FromArgb(55, 65, 81),
                Location = new Point(20, y3 + 4), AutoSize = true };
            grp.Controls.Add(lblTimeLbl);

            lblTime = new Label { Text = "--", Font = normalFont, ForeColor = Color.FromArgb(31, 41, 55),
                Location = new Point(110, y3 + 4), AutoSize = true };
            grp.Controls.Add(lblTime);
        }

        // ── 操作方法 ──

        private void DoConnect(string opName, ComboBox cmb)
        {
            string com = cmb.SelectedItem?.ToString();
            if (string.IsNullOrEmpty(com))
            {
                MessageBox.Show("请选择COM口", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            BarcodeScanner scanner;
            if (!BarcodeManager.Scanners.TryGetValue(opName, out scanner))
            {
                scanner = new BarcodeScanner(opName, MesWorkForm.BarcodeBaudRate);
                scanner.BarcodeReceived += (op, code) => BarcodeManager.ManualSend(op, code);
                BarcodeManager.Scanners[opName] = scanner;
            }

            bool ok = scanner.Connect(com);
            MessageBox.Show(ok ? $"{opName} 扫码枪已连接 ({com})" : $"{opName} 连接失败，请检查COM口",
                "连接结果", MessageBoxButtons.OK, ok ? MessageBoxIcon.Information : MessageBoxIcon.Warning);
        }

        private void DoDisconnect(string opName)
        {
            if (BarcodeManager.Scanners.TryGetValue(opName, out var scanner))
            {
                scanner.Disconnect();
                MessageBox.Show($"{opName} 扫码枪已断开", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void DoManualSend(string opName, TextBox txtBar)
        {
            string barcode = txtBar.Text.Trim();
            if (string.IsNullOrEmpty(barcode))
            {
                MessageBox.Show("请输入条码值", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            BarcodeManager.ManualSend(opName, barcode);
            MessageBox.Show($"已手动发送条码：{barcode}\n工位：{opName}", "发送成功", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

        private void RefreshComPorts(ComboBox cmb, string opName)
        {
            cmb.Items.Clear();
            var ports = BarcodeManager.GetAvailablePorts();
            foreach (var p in ports)
                cmb.Items.Add(p);

            // 自动选中当前配置的COM口或已连接的COM口
            if (BarcodeManager.Scanners.TryGetValue(opName, out var scanner) && !string.IsNullOrEmpty(scanner.ComPort))
            {
                int idx = cmb.Items.IndexOf(scanner.ComPort);
                if (idx >= 0) cmb.SelectedIndex = idx;
            }
        }

        // ── 定时刷新状态 ──

        private void timer_Refresh_Tick(object sender, EventArgs e)
        {
            RefreshScannerStatus("OP10", lbl_Status1, txt_Barcode1, lbl_ScanTime1);
            RefreshScannerStatus("OP20", lbl_Status2, txt_Barcode2, lbl_ScanTime2);
        }

        private void RefreshScannerStatus(string opName, Label lblStatus, TextBox txtBar, Label lblTime)
        {
            if (lblStatus == null) return;

            if (BarcodeManager.Scanners.TryGetValue(opName, out var scanner))
            {
                if (scanner.IsConnected)
                {
                    lblStatus.Text = $"● 已连接 ({scanner.ComPort})";
                    lblStatus.ForeColor = Color.FromArgb(16, 185, 129); // 绿色
                }
                else
                {
                    lblStatus.Text = $"● 未连接 ({scanner.ComPort})";
                    lblStatus.ForeColor = Color.FromArgb(239, 68, 68); // 红色
                }

                // 仅在有新扫码时更新（避免覆盖用户手动输入）
                if (!string.IsNullOrEmpty(scanner.LastBarcode) && txtBar.Text != scanner.LastBarcode && !txtBar.Focused)
                    txtBar.Text = scanner.LastBarcode;

                lblTime.Text = scanner.LastScanTime.HasValue
                    ? scanner.LastScanTime.Value.ToString("yyyy-MM-dd HH:mm:ss")
                    : "--";
            }
            else
            {
                lblStatus.Text = "● 未配置";
                lblStatus.ForeColor = Color.FromArgb(156, 163, 175);
                lblTime.Text = "--";
            }
        }
    }
}