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

namespace AmtScanner.Api.Controllers;

/// <summary>
/// 远程桌面控制器
/// </summary>
[ApiController]
[Route("api/remote-desktop")]
public class RemoteDesktopController : ControllerBase
{
    private readonly ILogger<RemoteDesktopController> _logger;
    private readonly GuacamoleService _guacamoleService;
    private readonly AppDbContext _db;
    private readonly IConfiguration _config;

    public RemoteDesktopController(
        ILogger<RemoteDesktopController> logger,
        GuacamoleService guacamoleService,
        AppDbContext db,
        IConfiguration config)
    {
        _logger = logger;
        _guacamoleService = guacamoleService;
        _db = db;
        _config = config;
    }

    /// <summary>
    /// 连接到设备的远程桌面 (RDP)
    /// </summary>
    [HttpPost("connect/rdp")]
    public async Task<IActionResult> ConnectRdp([FromBody] RdpConnectRequest request)
    {
        if (string.IsNullOrEmpty(request.Hostname))
        {
            return BadRequest(ApiResponse.Fail(400, "主机地址不能为空"));
        }

        try
        {
            var connectionName = $"RDP-{request.Hostname}-{DateTime.Now:yyyyMMddHHmmss}";
            
            var connectionId = await _guacamoleService.CreateRdpConnectionAsync(
                connectionName,
                request.Hostname,
                request.Username ?? "",
                request.Password ?? "",
                request.Port);

            if (string.IsNullOrEmpty(connectionId))
            {
                return BadRequest(ApiResponse.Fail(500, "创建远程连接失败，请检查 Guacamole 服务是否正常"));
            }

            var connectionUrl = await _guacamoleService.GetConnectionUrlAsync(connectionId);

            return Ok(ApiResponse.Success(new
            {
                connectionId,
                connectionUrl,
                guacamoleUrl = _config["Guacamole:BaseUrl"] ?? "http://localhost:8080/guacamole"
            }));
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "创建 RDP 连接失败");
            return BadRequest(ApiResponse.Fail(500, $"创建连接失败: {ex.Message}"));
        }
    }

    /// <summary>
    /// 连接到设备的远程桌面 (VNC)
    /// </summary>
    [HttpPost("connect/vnc")]
    public async Task<IActionResult> ConnectVnc([FromBody] VncConnectRequest request)
    {
        if (string.IsNullOrEmpty(request.Hostname))
        {
            return BadRequest(ApiResponse.Fail(400, "主机地址不能为空"));
        }

        try
        {
            var connectionName = $"VNC-{request.Hostname}-{DateTime.Now:yyyyMMddHHmmss}";
            
            var connectionId = await _guacamoleService.CreateVncConnectionAsync(
                connectionName,
                request.Hostname,
                request.Password ?? "",
                request.Port);

            if (string.IsNullOrEmpty(connectionId))
            {
                return BadRequest(ApiResponse.Fail(500, "创建远程连接失败，请检查 Guacamole 服务是否正常"));
            }

            var connectionUrl = await _guacamoleService.GetConnectionUrlAsync(connectionId);

            return Ok(ApiResponse.Success(new
            {
                connectionId,
                connectionUrl,
                guacamoleUrl = _config["Guacamole:BaseUrl"] ?? "http://localhost:8080/guacamole"
            }));
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "创建 VNC 连接失败");
            return BadRequest(ApiResponse.Fail(500, $"创建连接失败: {ex.Message}"));
        }
    }

    /// <summary>
    /// 通过设备 UUID 连接远程桌面
    /// </summary>
    [HttpPost("connect/device/{uuid}")]
    public async Task<IActionResult> ConnectByDevice(string uuid, [FromBody] DeviceConnectRequest request)
    {
        // 先查找 Agent 设备
        var agentDevice = await _db.AgentDevices_new.FirstOrDefaultAsync(d => d.Uuid == uuid);
        if (agentDevice != null)
        {
            var connectionName = $"RDP-{agentDevice.Hostname ?? agentDevice.IpAddress}-{DateTime.Now:yyyyMMddHHmmss}";
            
            var connectionId = await _guacamoleService.CreateRdpConnectionAsync(
                connectionName,
                agentDevice.IpAddress,
                request.Username ?? "",
                request.Password ?? "",
                request.Port > 0 ? request.Port : 3389);

            if (string.IsNullOrEmpty(connectionId))
            {
                return BadRequest(ApiResponse.Fail(500, "创建远程连接失败"));
            }

            var connectionUrl = await _guacamoleService.GetConnectionUrlAsync(connectionId);

            return Ok(ApiResponse.Success(new
            {
                connectionId,
                connectionUrl,
                deviceName = agentDevice.Hostname ?? agentDevice.IpAddress,
                guacamoleUrl = _config["Guacamole:BaseUrl"] ?? "http://localhost:8080/guacamole"
            }));
        }

        // 再查找 AMT 设备
        var amtDevice = await _db.AmtDevices_new.FirstOrDefaultAsync(d => d.Uuid == uuid);
        if (amtDevice != null)
        {
            var connectionName = $"RDP-{amtDevice.Hostname ?? amtDevice.IpAddress}-{DateTime.Now:yyyyMMddHHmmss}";
            
            var connectionId = await _guacamoleService.CreateRdpConnectionAsync(
                connectionName,
                amtDevice.IpAddress,
                request.Username ?? "",
                request.Password ?? "",
                request.Port > 0 ? request.Port : 3389);

            if (string.IsNullOrEmpty(connectionId))
            {
                return BadRequest(ApiResponse.Fail(500, "创建远程连接失败"));
            }

            var connectionUrl = await _guacamoleService.GetConnectionUrlAsync(connectionId);

            return Ok(ApiResponse.Success(new
            {
                connectionId,
                connectionUrl,
                deviceName = amtDevice.Hostname ?? amtDevice.IpAddress,
                guacamoleUrl = _config["Guacamole:BaseUrl"] ?? "http://localhost:8080/guacamole"
            }));
        }

        return NotFound(ApiResponse.Fail(404, "设备不存在"));
    }

    /// <summary>
    /// 断开连接（删除 Guacamole 连接）
    /// </summary>
    [HttpDelete("disconnect/{connectionId}")]
    public async Task<IActionResult> Disconnect(string connectionId)
    {
        var result = await _guacamoleService.DeleteConnectionAsync(connectionId);
        
        if (result)
        {
            return Ok(ApiResponse.Success("连接已断开"));
        }
        else
        {
            return BadRequest(ApiResponse.Fail(500, "断开连接失败"));
        }
    }

    /// <summary>
    /// 获取所有远程连接
    /// </summary>
    [HttpGet("connections")]
    public async Task<IActionResult> GetConnections()
    {
        var connections = await _guacamoleService.GetConnectionsAsync();
        return Ok(ApiResponse.Success(connections));
    }

    /// <summary>
    /// 获取 Guacamole 配置信息
    /// </summary>
    [HttpGet("config")]
    public IActionResult GetConfig()
    {
        return Ok(ApiResponse.Success(new
        {
            guacamoleUrl = _config["Guacamole:BaseUrl"] ?? "http://localhost:8080/guacamole",
            enabled = !string.IsNullOrEmpty(_config["Guacamole:BaseUrl"])
        }));
    }
}

public class RdpConnectRequest
{
    public string Hostname { get; set; } = "";
    public string? Username { get; set; }
    public string? Password { get; set; }
    public int Port { get; set; } = 3389;
}

public class VncConnectRequest
{
    public string Hostname { get; set; } = "";
    public string? Password { get; set; }
    public int Port { get; set; } = 5900;
}

public class DeviceConnectRequest
{
    public string? Username { get; set; }
    public string? Password { get; set; }
    public int Port { get; set; } = 3389;
    public string Protocol { get; set; } = "rdp"; // rdp 或 vnc
}