using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.SignalR;
using RobotNet10.RobotApp.Client.Shared.Devices;
using RobotNet10.RobotApp.Devices;
using RobotNet10.Shared;

namespace RobotNet10.RobotApp.Hubs;

/// <summary>
/// SignalR Hub cho ModbusTCP device - cung cấp real-time Modbus data
/// </summary>
[Authorize]
public class ModbusTcpHub(IDeviceProvider deviceProvider) : Hub
{
    /// <summary>
    /// Lấy thông tin device (DeviceName) theo device ID
    /// </summary>
    public async Task<DeviceInfoDto?> GetDeviceInfo(string deviceId)
    {
        var device = deviceProvider.GetDevice(deviceId);
        if (device is not IModbusTcpDevice)
        {
            return null;
        }

        return new DeviceInfoDto
        {
            DeviceId = device.DeviceId,
            DeviceName = device.DeviceName
        };
    }

    /// <summary>
    /// Lấy tất cả dữ liệu Modbus theo device ID
    /// </summary>
    public async Task<ModbusTcpData?> GetModbusData(string deviceId)
    {
        var device = deviceProvider.GetDevice(deviceId);
        if (device is not IModbusTcpDevice modbusDevice)
        {
            return null;
        }

        return MapToDto(modbusDevice);
    }

    /// <summary>
    /// Ghi một coil theo device ID
    /// </summary>
    /// <param name="deviceId">Device ID</param>
    /// <param name="address">Địa chỉ coil</param>
    /// <param name="value">Giá trị cần ghi (true/false)</param>
    /// <returns>True nếu thành công, false nếu thất bại</returns>
    public async Task<bool> WriteCoil(string deviceId, ushort address, bool value)
    {
        var device = deviceProvider.GetDevice(deviceId);
        if (device is not IModbusTcpDevice modbusDevice)
        {
            return false;
        }

        try
        {
            await modbusDevice.WriteCoilAsync(address, value);
            return true;
        }
        catch
        {
            return false;
        }
    }

    /// <summary>
    /// Map IModbusTcpDevice sang ModbusTcpDataDto
    /// </summary>
    private static ModbusTcpData MapToDto(IModbusTcpDevice modbusDevice)
    {
        var dto = new ModbusTcpData
        {
            IpAddress = modbusDevice.IpAddress,
            Port = modbusDevice.Port,
            SlaveId = modbusDevice.SlaveId,
            IsConnected = modbusDevice.IsConnected
        };

        var holdingRegisters = new List<ModbusRangeData>();
        // Lấy Holding Registers
        foreach (var range in modbusDevice.HoldingRegisterRanges)
        {
            try
            {
                var values = modbusDevice.ReadHoldingRegisters(range.StartAddress, range.Quantity);
                var rangeData = new ModbusRangeData
                {
                    StartAddress = range.StartAddress,
                    Quantity = range.Quantity,
                    Name = range.Name,
                    ChildrenNames = range.ChildrenNames == null ? [] : [.. range.ChildrenNames]
                };

                var modbusValues = new List<ModbusValue>();
                for (ushort i = 0; i < values.Length; i++)
                {
                    var address = (ushort)(range.StartAddress + i);
                    var childName = (range.ChildrenNames != null && i < range.ChildrenNames.Length) ? range.ChildrenNames[i] : "";
                    modbusValues.Add(new ModbusValue
                    {
                        Address = address,
                        Index = i,
                        Value = values[i],
                        Name = childName
                    });
                }
                rangeData.Values = [.. modbusValues];
                holdingRegisters.Add(rangeData);
            }
            catch
            {
                // Skip range nếu không đọc được
            }
        }
        dto.HoldingRegisters = [.. holdingRegisters];


        var inputRegisters = new List<ModbusRangeData>();
        // Lấy Input Registers
        foreach (var range in modbusDevice.InputRegisterRanges)
        {
            try
            {
                var values = modbusDevice.ReadInputRegisters(range.StartAddress, range.Quantity);
                var rangeData = new ModbusRangeData
                {
                    StartAddress = range.StartAddress,
                    Quantity = range.Quantity,
                    Name = range.Name,
                    ChildrenNames = range.ChildrenNames == null ? [] : [.. range.ChildrenNames]
                };

                var modbusValues = new List<ModbusValue>();
                for (ushort i = 0; i < values.Length; i++)
                {
                    var address = (ushort)(range.StartAddress + i);
                    var childName = (range.ChildrenNames != null && i < range.ChildrenNames.Length) ? range.ChildrenNames[i] : "";
                    modbusValues.Add(new ModbusValue
                    {
                        Address = address,
                        Index = i,
                        Value = values[i],
                        Name = childName
                    });
                }
                rangeData.Values = [.. modbusValues];

                inputRegisters.Add(rangeData);
            }
            catch
            {
                // Skip range nếu không đọc được
            }
        }
        dto.InputRegisters = [.. inputRegisters];

        // Lấy Coils
        var coils = new List<ModbusRangeData>();
        foreach (var range in modbusDevice.CoilRanges)
        {
            try
            {
                var values = modbusDevice.ReadCoils(range.StartAddress, range.Quantity);
                var rangeData = new ModbusRangeData
                {
                    StartAddress = range.StartAddress,
                    Quantity = range.Quantity,
                    Name = range.Name,
                    ChildrenNames = range.ChildrenNames ?? []
                };

                var modbusValues = new List<ModbusBoolValue>();
                for (ushort i = 0; i < values.Length; i++)
                {
                    var address = (ushort)(range.StartAddress + i);
                    var childName = (range.ChildrenNames != null && i < range.ChildrenNames.Length) ? range.ChildrenNames[i] : "";
                    modbusValues.Add(new ModbusBoolValue
                    {
                        Address = address,
                        Index = i,
                        Value = values[i],
                        Name = childName
                    });
                }
                rangeData.BoolValues = [.. modbusValues];
                coils.Add(rangeData);
            }
            catch
            {
                // Skip range nếu không đọc được
            }
        }
        dto.Coils = [.. coils];

        // Lấy Discrete Inputs
        var inputs = new List<ModbusRangeData>();
        foreach (var range in modbusDevice.DiscreteInputRanges)
        {
            try
            {
                var values = modbusDevice.ReadDiscreteInputs(range.StartAddress, range.Quantity);
                var rangeData = new ModbusRangeData
                {
                    StartAddress = range.StartAddress,
                    Quantity = range.Quantity,
                    Name = range.Name,
                    ChildrenNames = range.ChildrenNames ?? []
                };

                var modbusValues = new List<ModbusBoolValue>();
                for (ushort i = 0; i < values.Length; i++)
                {
                    var address = (ushort)(range.StartAddress + i);
                    var childName =  (range.ChildrenNames != null && i < range.ChildrenNames.Length) ? range.ChildrenNames[i] : "";
                    modbusValues.Add(new ModbusBoolValue
                    {
                        Address = address,
                        Index = i,
                        Value = values[i],
                        Name = childName
                    });
                }
                rangeData.BoolValues = [.. modbusValues];
                inputs.Add(rangeData);
            }
            catch
            {
                // Skip range nếu không đọc được
            }
        }
        dto.DiscreteInputs = [.. inputs];
        return dto;
    }
}