using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Threading;
using MembranePoreTester.Communication;
using MembranePoreTester.ViewModels;

namespace MembranePoreTester.Views
{
    public partial class ParameterWindow : Window
    {
        private readonly IPlcService _plcService;
        private readonly PlcConfiguration _config;
        private DispatcherTimer _autoRefreshTimer;

        // 用于快速查找文本框对应的写入地址和方法（可根据需要扩展）
        private readonly Dictionary<TextBox, (ushort address, string paramName)> _textBoxMapping;

        public ParameterWindow()
        {
            InitializeComponent();
            _plcService = App.PlcService;
            _config = App.PlcConfig;

            // 初始化文本框到寄存器地址的映射
            _textBoxMapping = new Dictionary<TextBox, (ushort, string)>
            {
                //[txtPressureUpper] = (_config.PressureUpperLimit, "加压上限"),
                //[txtPressureRate] = (_config.PressureRate, "加压速率"),
                //[txtPressureCoeff] = (_config.PressureCoeff, "加压系数"),

                //[txtHPCoeff11] = (_config.HPCoeff11, "工位1加压速率"),
                [txtHPCoeff1] = (_config.HPCoeff1, "工位1高压系数"),
                [txtLPCoeff1] = (_config.LPCoeff1, "工位1低压系数"),
                [txtHPCoeff2] = (_config.HPCoeff2, "工位2高压系数"),
                [txtLPCoeff2] = (_config.LPCoeff2, "工位2低压系数"),
                [txtHPCoeff3] = (_config.HPCoeff3, "工位3高压系数"),
                [txtLPCoeff3] = (_config.LPCoeff3, "工位3低压系数"),

                [txtLargeFlow1] = (_config.LargeFlowCoeff1, "工位1大流量系数"),
                [txtSmallFlow1] = (_config.SmallFlowCoeff1, "工位1小流量系数"),
                [txtLargeFlow2] = (_config.LargeFlowCoeff2, "工位2大流量系数"),
                [txtSmallFlow2] = (_config.SmallFlowCoeff2, "工位2小流量系数"),
                [txtLargeFlow3] = (_config.LargeFlowCoeff3, "工位3大流量系数"),
                [txtSmallFlow3] = (_config.SmallFlowCoeff3, "工位3小流量系数"),

                //[txtPressureZero] = (_config.PressureCalibZero, "压力零点"),
                //[txtPressureSpan] = (_config.PressureCalibSpan, "压力量程"),
                //[txtFlowZero] = (_config.FlowCalibZero, "流量零点"),
                //[txtFlowSpan] = (_config.FlowCalibSpan, "流量量程"),
            };

            // 为所有文本框注册焦点事件
            RegisterTextBoxEvents();

            Loaded += async (s, e) =>
            {
                // 启动定时器
                _autoRefreshTimer = new DispatcherTimer
                {
                    Interval = TimeSpan.FromSeconds(1)
                };
                _autoRefreshTimer.Tick += AutoRefreshTimer_Tick;
                _autoRefreshTimer.Start();

                // 首次加载时读取一次
                await LoadParameters();
            };

            Closed += (s, e) => _autoRefreshTimer?.Stop();
        }

        private void RegisterTextBoxEvents()
        {
            foreach (var tb in _textBoxMapping.Keys)
            {
                tb.GotFocus += (s, e) => { /* 什么都不做，只是为了让自动刷新跳过当前焦点的文本框 */ };
                tb.LostFocus += async (s, e) =>
                {
                    // 失去焦点时，将当前文本框的值写入PLC
                    var (address, name) = _textBoxMapping[tb];
                    if (float.TryParse(tb.Text, out float value))
                    {
                        try
                        {
                            await WriteFloatAsync(address, value);
                            // 可选：显示短暂提示（避免频繁弹窗）
                            System.Diagnostics.Debug.WriteLine($"{name} 已写入: {value}");
                        }
                        catch (Exception ex)
                        {
                            MessageBox.Show($"写入 {name} 失败: {ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                        }
                    }
                    else
                    {
                        // 输入无效，可提示或恢复原值
                        MessageBox.Show($"请输入有效的数值", "输入错误", MessageBoxButton.OK, MessageBoxImage.Warning);
                        // 重新从PLC读取该参数恢复原值
                        await UpdateSingleTextBox(tb, address);
                    }
                };
            }
        }

        /// <summary>
        /// 更新单个文本框的值（从PLC读取）
        /// </summary>
        private async Task UpdateSingleTextBox(TextBox tb, ushort address)
        {
            try
            {
                float val = await ReadFloatAsync(address);
                tb.Text = val.ToString("F3");
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"更新文本框失败: {ex.Message}");
            }
        }

        private async void AutoRefreshTimer_Tick(object sender, EventArgs e)
        {
            // 只更新当前没有获得焦点的文本框
            await Dispatcher.InvokeAsync(async () =>
            {
                foreach (var kv in _textBoxMapping)
                {
                    var tb = kv.Key;
                    var address = kv.Value.address;
                    if (!tb.IsFocused)
                    {
                        try
                        {
                            float val = await ReadFloatAsync(address);
                            tb.Text = val.ToString("F3");
                        }
                        catch (Exception ex)
                        {
                            System.Diagnostics.Debug.WriteLine($"自动刷新 {kv.Value.paramName} 失败: {ex.Message}");
                        }
                    }
                }
            });
        }

        /// <summary>
        /// 一次性加载所有参数（用于窗口启动）
        /// </summary>
        private async Task LoadParameters()
        {
            foreach (var kv in _textBoxMapping)
            {
                await UpdateSingleTextBox(kv.Key, kv.Value.address);
            }
        }

        // 以下方法与之前相同，但保留用于写入（已在LostFocus中调用）
        private async Task<float> ReadFloatAsync(ushort address)
        {
            var registers = await ((ModbusTcpPlcService)_plcService).ReadHoldingRegistersAsync(address, 2);
            return ((ModbusTcpPlcService)_plcService).UshortToFloat(registers[1], registers[0]);
        }

        private async Task WriteFloatAsync(ushort address, float value)
        {
            await ((ModbusTcpPlcService)_plcService).WriteMultipleRegistersAsync(address, value);
        }

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