using System;
using System.Collections.Specialized;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using TeamAAS.Communication.Base;
using TeamAAS.Communication.Interfaces;

namespace TeamAAS.Communication.UI
{
    /// <summary>
    /// 默认通讯调试页：按设备类型自适应——PLC 设备(PlcCommunicationBase)显示寄存器读写(带数据类型/长度)，
    /// 其余(串口/文本)显示收发；底部收发/读写日志(双击清空)。
    /// 未在 [Communication] 特性指定 DebugPageType 的设备均用本页。直接操作 BindCommunication 得到的实例。
    /// </summary>
    public partial class DefaultCommunicationDebugPage : UserControl, ICommunicationDebugPage
    {
        private ICommunication _comm;
        private BindableCommunicationBase _logDevice;

        public DefaultCommunicationDebugPage()
        {
            InitializeComponent();
            TypeCombo.ItemsSource = Enum.GetValues(typeof(DebugDataType));
            TypeCombo.SelectedItem = DebugDataType.Int;
            IsEnabled = false;
        }

        public void BindCommunication(ICommunication communication)
        {
            UnbindCommunication();
            _comm = communication;

            bool isPlc = communication is PlcCommunicationBase;
            PlcPanel.Visibility = isPlc ? Visibility.Visible : Visibility.Collapsed;
            TextPanel.Visibility = isPlc ? Visibility.Collapsed : Visibility.Visible;

            _logDevice = communication as BindableCommunicationBase;
            LogList.ItemsSource = _logDevice == null ? null : _logDevice.DebugLog;
            if (_logDevice != null)
                _logDevice.DebugLog.CollectionChanged += OnLogChanged;

            IsEnabled = communication != null;
            ScrollLast();
        }

        public void UnbindCommunication()
        {
            if (_logDevice != null)
                _logDevice.DebugLog.CollectionChanged -= OnLogChanged;
            _logDevice = null;
            _comm = null;
            LogList.ItemsSource = null;
            IsEnabled = false;
        }

        private void OnLogChanged(object sender, NotifyCollectionChangedEventArgs e)
        {
            if (e.Action == NotifyCollectionChangedAction.Add)
                Dispatcher.BeginInvoke(new Action(ScrollLast), System.Windows.Threading.DispatcherPriority.Normal);
        }

        private void ScrollLast()
        {
            if (LogList.Items.Count == 0) return;
            var last = LogList.Items[LogList.Items.Count - 1];
            LogList.ScrollIntoView(last);
            var sv = FindScrollViewer(LogList);
            if (sv != null) sv.ScrollToEnd();
        }

        private static ScrollViewer FindScrollViewer(DependencyObject root)
        {
            if (root == null) return null;
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(root); i++)
            {
                var child = VisualTreeHelper.GetChild(root, i);
                if (child is ScrollViewer) return (ScrollViewer)child;
                var found = FindScrollViewer(child);
                if (found != null) return found;
            }
            return null;
        }

        private void LogList_MouseDoubleClick(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            if (_logDevice != null) _logDevice.DebugLog.Clear();
        }

        private void BtnSend_Click(object sender, RoutedEventArgs e)
        {
            if (_comm == null || string.IsNullOrEmpty(TxtSend.Text)) return;
            try
            {
                _comm.WriteValue(null, TxtSend.Text);
                if (_logDevice != null) _logDevice.AppendLog("TX: " + TxtSend.Text);
            }
            catch (Exception ex)
            {
                if (_logDevice != null) _logDevice.AppendLog("发送失败: " + ex.Message);
            }
        }

        private void BtnRead_Click(object sender, RoutedEventArgs e)
        {
            var plc = _comm as PlcCommunicationBase;
            if (plc == null) return;
            try
            {
                string addr = (TxtAddress.Text ?? "").Trim();
                DebugDataType type = CurrentType;
                ushort len = CurrentLength;
                var result = plc.ReadValue(addr, type, len);
                string lenStr = len > 1 ? (", len=" + len) : "";
                plc.AppendLog("读取  " + addr + " (" + type + lenStr + ") => " + FormatResult(result));
            }
            catch (Exception ex) { plc.AppendLog("读取失败: " + ex.Message); }
        }

        private void BtnWrite_Click(object sender, RoutedEventArgs e)
        {
            var plc = _comm as PlcCommunicationBase;
            if (plc == null) return;
            try
            {
                string addr = (TxtAddress.Text ?? "").Trim();
                DebugDataType type = CurrentType;
                ushort len = CurrentLength;
                object val = ParseDebugValue(TxtWriteValue.Text, type);
                Array arr = val as Array;
                if (arr != null && arr.Length != len)
                {
                    plc.AppendLog("写入失败: 数组长度(" + arr.Length + ")与长度设置(" + len + ")不一致");
                    return;
                }
                if (arr != null) plc.WriteValue(addr, val, type, len);
                else plc.WriteValue(addr, val, type);
                string lenStr = arr != null ? (", len=" + len) : "";
                plc.AppendLog("写入  " + addr + " (" + type + lenStr + ") = " + FormatResult(val));
            }
            catch (Exception ex) { plc.AppendLog("写入失败: " + ex.Message); }
        }

        private DebugDataType CurrentType
        {
            get
            {
                if (TypeCombo.SelectedItem is DebugDataType) return (DebugDataType)TypeCombo.SelectedItem;
                return DebugDataType.Int;
            }
        }

        private ushort CurrentLength
        {
            get
            {
                int n;
                if (!int.TryParse((TxtLength.Text ?? "").Trim(), out n)) n = 1;
                if (n < 1) n = 1;
                if (n > 100) n = 100;
                return (ushort)n;
            }
        }

        private static string FormatResult(object value)
        {
            if (value == null) return "(null)";
            Array arr = value as Array;
            if (arr != null) return "[" + string.Join(",", arr.Cast<object>()) + "]";
            return value.ToString();
        }

        private static object ParseDebugValue(string text, DebugDataType type)
        {
            if (!string.IsNullOrWhiteSpace(text))
            {
                string t = text.Trim();
                if (t.StartsWith("[") && t.EndsWith("]"))
                {
                    string inner = t.Substring(1, t.Length - 2);
                    var vals = inner.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries)
                        .Select(p => p.Trim()).Where(p => p.Length > 0).ToArray();
                    if (vals.Length > 0)
                    {
                        switch (type)
                        {
                            case DebugDataType.Bool: return vals.Select(p => bool.Parse(p)).ToArray();
                            case DebugDataType.Byte: return vals.Select(p => byte.Parse(p)).ToArray();
                            case DebugDataType.Short: return vals.Select(p => short.Parse(p)).ToArray();
                            case DebugDataType.Ushort: return vals.Select(p => ushort.Parse(p)).ToArray();
                            case DebugDataType.Int: return vals.Select(p => int.Parse(p)).ToArray();
                            case DebugDataType.Uint: return vals.Select(p => uint.Parse(p)).ToArray();
                            case DebugDataType.Long: return vals.Select(p => long.Parse(p)).ToArray();
                            case DebugDataType.Ulong: return vals.Select(p => ulong.Parse(p)).ToArray();
                            case DebugDataType.Float: return vals.Select(p => float.Parse(p)).ToArray();
                            case DebugDataType.Double: return vals.Select(p => double.Parse(p)).ToArray();
                        }
                    }
                }
            }
            switch (type)
            {
                case DebugDataType.Bool: return bool.Parse(text);
                case DebugDataType.Byte: return byte.Parse(text);
                case DebugDataType.Short: return short.Parse(text);
                case DebugDataType.Ushort: return ushort.Parse(text);
                case DebugDataType.Int: return int.Parse(text);
                case DebugDataType.Uint: return uint.Parse(text);
                case DebugDataType.Long: return long.Parse(text);
                case DebugDataType.Ulong: return ulong.Parse(text);
                case DebugDataType.Float: return float.Parse(text);
                case DebugDataType.Double: return double.Parse(text);
                default: return text;
            }
        }
    }
}