using System;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Net;
using System.Threading.Tasks;
using System.Windows;
using TeamAAS.Dialogs;
using TeamAAS.Feeder.Network;

namespace TeamAAS.Views
{
    /// <summary>
    /// 供料器 IP 自动搜索弹窗：UDP 广播扫描局域网内的 Feeder，
    /// 选中后可回填到当前供料器(IP/端口)，或直接下发设置 Feeder 的 IP。
    /// </summary>
    public partial class SearchFeederWindow
    {
        /// <summary>用户选中并确认回填的 Feeder 网络信息。</summary>
        public FeederNetworkInfo SelectedResult { get; private set; }

        private readonly ObservableCollection<FeederNetworkInfo> _results = new ObservableCollection<FeederNetworkInfo>();
        private readonly FeederIpScanner _scanner = new FeederIpScanner();

        public SearchFeederWindow()
        {
            InitializeComponent();
            UiScaler.Attach(this); // 分辨率/DPI 自适应
            ResultListBox.ItemsSource = _results;
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            // 打开即自动搜索一次
            _ = ScanAsync();
        }

        private async void Search_Click(object sender, RoutedEventArgs e)
        {
            await ScanAsync();
        }

        private async Task ScanAsync()
        {
            LoadingIndicator.Visibility = Visibility.Visible;
            StatusText.Text = "正在搜索 Feeder...";
            _results.Clear();
            FillButton.IsEnabled = false;
            SetIpButton.IsEnabled = false;
            try
            {
                var list = await _scanner.ScanAsync();
                foreach (var f in list) _results.Add(f);
                StatusText.Text = $"搜索完成，找到 {list.Count} 个 Feeder";
            }
            catch (Exception ex)
            {
                StatusText.Text = $"搜索失败: {ex.Message}";
            }
            finally
            {
                LoadingIndicator.Visibility = Visibility.Collapsed;
            }
        }

        private void Result_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            bool has = ResultListBox.SelectedItem != null;
            FillButton.IsEnabled = has;
            SetIpButton.IsEnabled = has;
        }

        private void Fill_Click(object sender, RoutedEventArgs e)
        {
            SelectedResult = ResultListBox.SelectedItem as FeederNetworkInfo;
            if (SelectedResult == null) return;
            DialogResult = true;
            Close();
        }

        private async void SetIp_Click(object sender, RoutedEventArgs e)
        {
            var feeder = ResultListBox.SelectedItem as FeederNetworkInfo;
            if (feeder == null) return;

            string newIp = DialogHelper.Input("新 IP 地址", "设置 Feeder IP", feeder.IP);
            if (string.IsNullOrWhiteSpace(newIp)) return;
            newIp = newIp.Trim();

            StatusText.Text = $"正在设置 {feeder.MAC} -> {newIp} ...";
            bool ok = await _scanner.SetFeederIpAsync(feeder.MAC, newIp, feeder.Port, feeder.Subnet, feeder.Network);
            StatusText.Text = ok ? $"设置成功: {newIp}" : "设置失败(设备未回应)";
            if (ok)
            {
                feeder.IP = newIp;
                if (feeder.Network?.IPv4Address != null && IPAddress.TryParse(newIp, out var nip))
                    feeder.IsAccessible = _scanner.AreFirstThreeOctetsEqual(nip, feeder.Network.IPv4Address);
                ResultListBox.Items.Refresh();
            }
        }

        private void Close_Click(object sender, RoutedEventArgs e)
        {
            Close();
        }

        private void Window_Closing(object sender, CancelEventArgs e)
        {
            _scanner.Dispose();
            if (!DialogResult.HasValue) DialogResult = false;
        }
    }
}