using AmtScanner.Api.Data;
using AmtScanner.Api.Services;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace AmtScanner.Api.Controllers;

[ApiController]
[Route("api/[controller]")]
public class PowerController : ControllerBase
{
    private readonly AppDbContext _context;
    private readonly IAmtPowerService _powerService;
    private readonly ICredentialService _credentialService;
    private readonly ILogger<PowerController> _logger;

    public PowerController(
        AppDbContext context,
        IAmtPowerService powerService,
        ICredentialService credentialService,
        ILogger<PowerController> logger)
    {
        _context = context;
        _powerService = powerService;
        _credentialService = credentialService;
        _logger = logger;
    }

    /// <summary>
    /// 获取设备电源状态
    /// </summary>
    [HttpGet("{deviceId}/state")]
    public async Task<ActionResult<PowerStateResponse>> GetPowerState(long deviceId)
    {
        var device = await _context.AmtDevices.FindAsync(deviceId);
        if (device == null)
        {
            return NotFound(new { error = "设备不存在" });
        }

        var credential = await _credentialService.GetDefaultCredentialAsync();
        if (credential == null)
        {
            return BadRequest(new { error = "没有配置默认凭据" });
        }

        var openPorts = new List<int>();
        if (device.AmtOnline)
        {
            // 检测可用端口
            openPorts = await DetectOpenPortsAsync(device.IpAddress);
        }

        if (openPorts.Count == 0)
        {
            return Ok(new PowerStateResponse
            {
                DeviceId = deviceId,
                IpAddress = device.IpAddress,
                Success = false,
                Error = "设备离线或AMT端口不可用"
            });
        }

        // 解密密码
        var decryptedPassword = _credentialService.DecryptPassword(credential.Password);

        var result = await _powerService.GetPowerStateAsync(
            device.IpAddress,
            credential.Username,
            decryptedPassword,
            openPorts);

        return Ok(new PowerStateResponse
        {
            DeviceId = deviceId,
            IpAddress = device.IpAddress,
            Success = result.Success,
            PowerState = result.PowerState,
            PowerStateText = result.PowerStateText,
            Error = result.Error
        });
    }

    /// <summary>
    /// 开机
    /// </summary>
    [HttpPost("{deviceId}/power-on")]
    public async Task<ActionResult<PowerActionResponse>> PowerOn(long deviceId)
    {
        return await ExecutePowerAction(deviceId, PowerAction.PowerOn);
    }

    /// <summary>
    /// 关机（优雅关机）
    /// </summary>
    [HttpPost("{deviceId}/power-off")]
    public async Task<ActionResult<PowerActionResponse>> PowerOff(long deviceId)
    {
        return await ExecutePowerAction(deviceId, PowerAction.GracefulOff);
    }

    /// <summary>
    /// 强制关机
    /// </summary>
    [HttpPost("{deviceId}/force-off")]
    public async Task<ActionResult<PowerActionResponse>> ForceOff(long deviceId)
    {
        return await ExecutePowerAction(deviceId, PowerAction.PowerOff);
    }

    /// <summary>
    /// 重启（优雅重启）
    /// </summary>
    [HttpPost("{deviceId}/restart")]
    public async Task<ActionResult<PowerActionResponse>> Restart(long deviceId)
    {
        return await ExecutePowerAction(deviceId, PowerAction.GracefulReset);
    }

    /// <summary>
    /// 强制重启
    /// </summary>
    [HttpPost("{deviceId}/force-restart")]
    public async Task<ActionResult<PowerActionResponse>> ForceRestart(long deviceId)
    {
        return await ExecutePowerAction(deviceId, PowerAction.Reset);
    }

    /// <summary>
    /// 电源循环（硬重启）
    /// </summary>
    [HttpPost("{deviceId}/power-cycle")]
    public async Task<ActionResult<PowerActionResponse>> PowerCycle(long deviceId)
    {
        return await ExecutePowerAction(deviceId, PowerAction.PowerCycle);
    }

    private async Task<ActionResult<PowerActionResponse>> ExecutePowerAction(long deviceId, PowerAction action)
    {
        var device = await _context.AmtDevices.FindAsync(deviceId);
        if (device == null)
        {
            return NotFound(new { error = "设备不存在" });
        }

        var credential = await _credentialService.GetDefaultCredentialAsync();
        if (credential == null)
        {
            return BadRequest(new { error = "没有配置默认凭据" });
        }

        // 检测可用端口
        var openPorts = await DetectOpenPortsAsync(device.IpAddress);

        if (openPorts.Count == 0)
        {
            return Ok(new PowerActionResponse
            {
                DeviceId = deviceId,
                IpAddress = device.IpAddress,
                Action = action.ToString(),
                Success = false,
                Error = "AMT端口不可用"
            });
        }

        // 解密密码
        var decryptedPassword = _credentialService.DecryptPassword(credential.Password);

        var result = await _powerService.ChangePowerStateAsync(
            device.IpAddress,
            credential.Username,
            decryptedPassword,
            openPorts,
            action);

        return Ok(new PowerActionResponse
        {
            DeviceId = deviceId,
            IpAddress = device.IpAddress,
            Action = action.ToString(),
            Success = result.Success,
            Message = result.Message,
            Error = result.Error
        });
    }

    private async Task<List<int>> DetectOpenPortsAsync(string ipAddress)
    {
        var openPorts = new List<int>();
        int[] amtPorts = { 16992, 16993 };

        foreach (var port in amtPorts)
        {
            try
            {
                using var client = new System.Net.Sockets.TcpClient();
                var connectTask = client.ConnectAsync(ipAddress, port);

                if (await Task.WhenAny(connectTask, Task.Delay(1000)) == connectTask)
                {
                    if (client.Connected)
                    {
                        openPorts.Add(port);
                    }
                }
            }
            catch
            {
                // 端口不可用
            }
        }

        return openPorts;
    }
}

public class PowerStateResponse
{
    public long DeviceId { get; set; }
    public string IpAddress { get; set; } = string.Empty;
    public bool Success { get; set; }
    public int PowerState { get; set; }
    public string PowerStateText { get; set; } = string.Empty;
    public string? Error { get; set; }
}

public class PowerActionResponse
{
    public long DeviceId { get; set; }
    public string IpAddress { get; set; } = string.Empty;
    public string Action { get; set; } = string.Empty;
    public bool Success { get; set; }
    public string Message { get; set; } = string.Empty;
    public string? Error { get; set; }
}