using System;
using System.IO.Ports;
using System.Windows.Forms;
using APS7100TestTool.Models;

namespace APS7100TestTool.Forms
{
    public partial class ConnectionDialog : Form
    {
        private AppSettings _settings;
        private DeviceType _deviceType;

        public AppSettings Settings => _settings;

        public ConnectionDialog(AppSettings settings, DeviceType deviceType)
        {
            InitializeComponent();
            _settings = settings;
            _deviceType = deviceType;

            InitializeUI();
        }

        private void InitializeUI()
        {
            // Set title
            string deviceName = _deviceType == DeviceType.APS7100 ? "APS-7100" : "PSW-250";
            this.Text = $"连接 {deviceName}";
            lblTitle.Text = $"连接到 {deviceName}";

            // Load COM ports
            RefreshComPorts();

            // Load settings
            if (_deviceType == DeviceType.APS7100)
            {
                rbSerial.Checked = _settings.APS7100ConnectionType == "Serial";
                rbEthernet.Checked = _settings.APS7100ConnectionType == "Ethernet";
                SelectComPort(_settings.APS7100ComPort);
                cmbBaudRate.Text = _settings.APS7100BaudRate.ToString();
                txtIpAddress.Text = _settings.APS7100IpAddress;
                numPort.Value = _settings.APS7100Port;
            }
            else
            {
                rbSerial.Checked = _settings.PSW250ConnectionType == "Serial";
                rbEthernet.Checked = _settings.PSW250ConnectionType == "Ethernet";
                SelectComPort(_settings.PSW250ComPort);
                cmbBaudRate.Text = _settings.PSW250BaudRate.ToString();
                txtIpAddress.Text = _settings.PSW250IpAddress;
                numPort.Value = _settings.PSW250Port;
            }

            UpdateUI();
        }

        private void RefreshComPorts()
        {
            cmbComPort.Items.Clear();
            string[] ports = SerialPort.GetPortNames();
            cmbComPort.Items.AddRange(ports);
        }

        private void SelectComPort(string portName)
        {
            if (!string.IsNullOrEmpty(portName))
            {
                int index = cmbComPort.Items.IndexOf(portName);
                if (index >= 0) cmbComPort.SelectedIndex = index;
                else if (cmbComPort.Items.Count > 0) cmbComPort.SelectedIndex = 0;
            }
            else if (cmbComPort.Items.Count > 0)
            {
                cmbComPort.SelectedIndex = 0;
            }
        }

        private void UpdateUI()
        {
            bool isSerial = rbSerial.Checked;
            
            lblComPort.Visible = isSerial;
            cmbComPort.Visible = isSerial;
            lblBaudRate.Visible = isSerial;
            cmbBaudRate.Visible = isSerial;
            btnRefresh.Visible = isSerial;
            
            lblIpAddress.Visible = !isSerial;
            txtIpAddress.Visible = !isSerial;
            lblPort.Visible = !isSerial;
            numPort.Visible = !isSerial;
        }

        private void rbSerial_CheckedChanged(object sender, EventArgs e) => UpdateUI();
        private void rbEthernet_CheckedChanged(object sender, EventArgs e) => UpdateUI();
        private void btnRefresh_Click(object sender, EventArgs e) => RefreshComPorts();

        private void btnConnect_Click(object sender, EventArgs e)
        {
            // Save settings
            if (_deviceType == DeviceType.APS7100)
            {
                _settings.APS7100ConnectionType = rbSerial.Checked ? "Serial" : "Ethernet";
                _settings.APS7100ComPort = cmbComPort.SelectedItem?.ToString() ?? "";
                _settings.APS7100BaudRate = int.TryParse(cmbBaudRate.Text, out int br) ? br : 9600;
                _settings.APS7100IpAddress = txtIpAddress.Text.Trim();
                _settings.APS7100Port = (int)numPort.Value;
            }
            else
            {
                _settings.PSW250ConnectionType = rbSerial.Checked ? "Serial" : "Ethernet";
                _settings.PSW250ComPort = cmbComPort.SelectedItem?.ToString() ?? "";
                _settings.PSW250BaudRate = int.TryParse(cmbBaudRate.Text, out int br) ? br : 9600;
                _settings.PSW250IpAddress = txtIpAddress.Text.Trim();
                _settings.PSW250Port = (int)numPort.Value;
            }

            this.DialogResult = DialogResult.OK;
            this.Close();
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.Cancel;
            this.Close();
        }
    }
}