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

namespace AmtScanner.Api.Controllers;

[ApiController]
[Route("api/amt-pending-devices")]
[Authorize]
public class AmtPendingDevicesController : ControllerBase
{
    private readonly AppDbContext _db;
    private readonly IAmtWsmanService _wsmanService;
    private readonly ILogger<AmtPendingDevicesController> _logger;

    public AmtPendingDevicesController(AppDbContext db, IAmtWsmanService wsmanService, ILogger<AmtPendingDevicesController> logger)
    {
        _db = db;
        _wsmanService = wsmanService;
        _logger = logger;
    }

    /// <summary>
    /// 获取待接管设备列表
    /// </summary>
    [HttpGet]
    public async Task<IActionResult> GetList([FromQuery] int page = 1, [FromQuery] int pageSize = 20, [FromQuery] bool? isTakenOver = null)
    {
        var query = _db.AmtPendingDevices_new.AsQueryable();
        
        if (isTakenOver.HasValue)
        {
            query = query.Where(d => d.IsTakenOver == isTakenOver.Value);
        }
        
        var total = await query.CountAsync();
        var items = await query
            .OrderByDescending(d => d.CreatedAt)
            .Skip((page - 1) * pageSize)
            .Take(pageSize)
            .ToListAsync();
        
        return Ok(ApiResponse<object>.Success(new { items, total, page, pageSize }));
    }

    /// <summary>
    /// 手动添加设备
    /// </summary>
    [HttpPost]
    public async Task<IActionResult> AddDevice([FromBody] AddPendingDeviceRequest request)
    {
        // 检查IP是否已存在
        var existing = await _db.AmtPendingDevices_new
            .FirstOrDefaultAsync(d => d.IpAddress == request.IpAddress);
        
        if (existing != null)
        {
            return BadRequest(ApiResponse<object>.Fail(400, $"IP地址 {request.IpAddress} 已存在"));
        }
        
        var device = new AmtPendingDevice_new
        {
            IpAddress = request.IpAddress,
            SubnetMask = request.SubnetMask,
            Gateway = request.Gateway,
            AmtUsername = request.AmtUsername,
            AmtPassword = request.AmtPassword,
            Source = "manual",
            CreatedAt = DateTime.UtcNow,
            UpdatedAt = DateTime.UtcNow
        };
        
        _db.AmtPendingDevices_new.Add(device);
        await _db.SaveChangesAsync();
        
        return Ok(ApiResponse<object>.Success(device, "添加成功"));
    }

    /// <summary>
    /// 批量添加设备
    /// </summary>
    [HttpPost("batch")]
    public async Task<IActionResult> BatchAddDevices([FromBody] List<AddPendingDeviceRequest> requests)
    {
        var added = 0;
        var skipped = 0;
        
        foreach (var request in requests)
        {
            var existing = await _db.AmtPendingDevices_new
                .FirstOrDefaultAsync(d => d.IpAddress == request.IpAddress);
            
            if (existing != null)
            {
                skipped++;
                continue;
            }
            
            var device = new AmtPendingDevice_new
            {
                IpAddress = request.IpAddress,
                SubnetMask = request.SubnetMask,
                Gateway = request.Gateway,
                AmtUsername = request.AmtUsername,
                AmtPassword = request.AmtPassword,
                Source = "manual",
                CreatedAt = DateTime.UtcNow,
                UpdatedAt = DateTime.UtcNow
            };
            
            _db.AmtPendingDevices_new.Add(device);
            added++;
        }
        
        await _db.SaveChangesAsync();
        
        return Ok(ApiResponse<object>.Success(new { added, skipped }, $"成功添加 {added} 个设备，跳过 {skipped} 个已存在的设备"));
    }

    /// <summary>
    /// 更新设备凭据
    /// </summary>
    [HttpPut("{id}/credentials")]
    public async Task<IActionResult> UpdateCredentials(int id, [FromBody] UpdateCredentialsRequest request)
    {
        var device = await _db.AmtPendingDevices_new.FindAsync(id);
        
        if (device == null)
        {
            return NotFound(ApiResponse<object>.Fail(404, "设备不存在"));
        }
        
        device.AmtUsername = request.AmtUsername;
        device.AmtPassword = request.AmtPassword;
        device.UpdatedAt = DateTime.UtcNow;
        
        await _db.SaveChangesAsync();
        
        return Ok(ApiResponse<object>.Success(device, "凭据更新成功"));
    }

    /// <summary>
    /// 批量更新设备凭据
    /// </summary>
    [HttpPut("batch-credentials")]
    public async Task<IActionResult> BatchUpdateCredentials([FromBody] BatchUpdateCredentialsRequest request)
    {
        var devices = await _db.AmtPendingDevices_new
            .Where(d => request.DeviceIds.Contains(d.Id))
            .ToListAsync();
        
        foreach (var device in devices)
        {
            device.AmtUsername = request.AmtUsername;
            device.AmtPassword = request.AmtPassword;
            device.UpdatedAt = DateTime.UtcNow;
        }
        
        await _db.SaveChangesAsync();
        
        return Ok(ApiResponse<object>.Success(null, $"已更新 {devices.Count} 个设备的凭据"));
    }

    /// <summary>
    /// 接管设备（获取UUID并移动到正式表）
    /// </summary>
    [HttpPost("{id}/takeover")]
    public async Task<IActionResult> TakeoverDevice(int id)
    {
        var pendingDevice = await _db.AmtPendingDevices_new.FindAsync(id);
        
        if (pendingDevice == null)
        {
            return NotFound(ApiResponse<object>.Fail(404, "设备不存在"));
        }
        
        if (string.IsNullOrEmpty(pendingDevice.AmtUsername) || string.IsNullOrEmpty(pendingDevice.AmtPassword))
        {
            return BadRequest(ApiResponse<object>.Fail(400, "请先配置AMT凭据"));
        }
        
        // 获取UUID
        var uuid = await _wsmanService.GetUuidAsync(
            pendingDevice.IpAddress, 
            pendingDevice.AmtUsername, 
            pendingDevice.AmtPassword);
        
        if (string.IsNullOrEmpty(uuid))
        {
            return BadRequest(ApiResponse<object>.Fail(400, "无法获取设备UUID，请检查凭据是否正确"));
        }
        
        // 检查UUID是否已存在
        var existingDevice = await _db.AmtDevices_new.FindAsync(uuid);
        if (existingDevice != null)
        {
            // 更新已存在的设备
            existingDevice.IpAddress = pendingDevice.IpAddress;
            existingDevice.SubnetMask = pendingDevice.SubnetMask;
            existingDevice.Gateway = pendingDevice.Gateway;
            existingDevice.AmtUsername = pendingDevice.AmtUsername;
            existingDevice.AmtPassword = pendingDevice.AmtPassword;
            existingDevice.AmtVersion = pendingDevice.AmtVersion;
            existingDevice.UpdatedAt = DateTime.UtcNow;
        }
        else
        {
            // 创建新设备
            var newDevice = new AmtDevice_new
            {
                Uuid = uuid,
                IpAddress = pendingDevice.IpAddress,
                SubnetMask = pendingDevice.SubnetMask,
                Gateway = pendingDevice.Gateway,
                AmtUsername = pendingDevice.AmtUsername,
                AmtPassword = pendingDevice.AmtPassword,
                AmtVersion = pendingDevice.AmtVersion,
                CreatedAt = DateTime.UtcNow,
                UpdatedAt = DateTime.UtcNow
            };
            
            _db.AmtDevices_new.Add(newDevice);
        }
        
        // 标记待接管设备为已接管
        pendingDevice.IsTakenOver = true;
        pendingDevice.UpdatedAt = DateTime.UtcNow;
        
        await _db.SaveChangesAsync();
        
        return Ok(ApiResponse<object>.Success(new { uuid }, "设备接管成功"));
    }

    /// <summary>
    /// 批量接管设备
    /// </summary>
    [HttpPost("batch-takeover")]
    public async Task<IActionResult> BatchTakeover([FromBody] BatchTakeoverRequest request)
    {
        var results = new List<TakeoverResult>();
        
        var devices = await _db.AmtPendingDevices_new
            .Where(d => request.DeviceIds.Contains(d.Id) && !d.IsTakenOver)
            .ToListAsync();
        
        foreach (var device in devices)
        {
            var result = new TakeoverResult { DeviceId = device.Id, IpAddress = device.IpAddress };
            
            if (string.IsNullOrEmpty(device.AmtUsername) || string.IsNullOrEmpty(device.AmtPassword))
            {
                result.Success = false;
                result.Message = "未配置凭据";
                results.Add(result);
                continue;
            }
            
            try
            {
                var uuid = await _wsmanService.GetUuidAsync(device.IpAddress, device.AmtUsername, device.AmtPassword);
                
                if (string.IsNullOrEmpty(uuid))
                {
                    result.Success = false;
                    result.Message = "无法获取UUID";
                    results.Add(result);
                    continue;
                }
                
                // 检查UUID是否已存在
                var existingDevice = await _db.AmtDevices_new.FindAsync(uuid);
                if (existingDevice != null)
                {
                    existingDevice.IpAddress = device.IpAddress;
                    existingDevice.SubnetMask = device.SubnetMask;
                    existingDevice.Gateway = device.Gateway;
                    existingDevice.AmtUsername = device.AmtUsername;
                    existingDevice.AmtPassword = device.AmtPassword;
                    existingDevice.AmtVersion = device.AmtVersion;
                    existingDevice.UpdatedAt = DateTime.UtcNow;
                }
                else
                {
                    var newDevice = new AmtDevice_new
                    {
                        Uuid = uuid,
                        IpAddress = device.IpAddress,
                        SubnetMask = device.SubnetMask,
                        Gateway = device.Gateway,
                        AmtUsername = device.AmtUsername,
                        AmtPassword = device.AmtPassword,
                        AmtVersion = device.AmtVersion,
                        CreatedAt = DateTime.UtcNow,
                        UpdatedAt = DateTime.UtcNow
                    };
                    _db.AmtDevices_new.Add(newDevice);
                }
                
                device.IsTakenOver = true;
                device.UpdatedAt = DateTime.UtcNow;
                
                result.Success = true;
                result.Uuid = uuid;
                result.Message = "接管成功";
            }
            catch (Exception ex)
            {
                result.Success = false;
                result.Message = ex.Message;
                _logger.LogError(ex, "接管设备 {Ip} 失败", device.IpAddress);
            }
            
            results.Add(result);
        }
        
        await _db.SaveChangesAsync();
        
        var successCount = results.Count(r => r.Success);
        var failCount = results.Count(r => !r.Success);
        
        return Ok(ApiResponse<object>.Success(new { results, successCount, failCount }));
    }

    /// <summary>
    /// 删除待接管设备
    /// </summary>
    [HttpDelete("{id}")]
    public async Task<IActionResult> DeleteDevice(int id)
    {
        var device = await _db.AmtPendingDevices_new.FindAsync(id);
        
        if (device == null)
        {
            return NotFound(ApiResponse<object>.Fail(404, "设备不存在"));
        }
        
        _db.AmtPendingDevices_new.Remove(device);
        await _db.SaveChangesAsync();
        
        return Ok(ApiResponse<object>.Success(null, "删除成功"));
    }
}

public class AddPendingDeviceRequest
{
    public string IpAddress { get; set; } = string.Empty;
    public string? SubnetMask { get; set; }
    public string? Gateway { get; set; }
    public string? AmtUsername { get; set; }
    public string? AmtPassword { get; set; }
}

public class UpdateCredentialsRequest
{
    public string AmtUsername { get; set; } = string.Empty;
    public string AmtPassword { get; set; } = string.Empty;
}

public class BatchUpdateCredentialsRequest
{
    public List<int> DeviceIds { get; set; } = new();
    public string AmtUsername { get; set; } = string.Empty;
    public string AmtPassword { get; set; } = string.Empty;
}

public class BatchTakeoverRequest
{
    public List<int> DeviceIds { get; set; } = new();
}

public class TakeoverResult
{
    public int DeviceId { get; set; }
    public string IpAddress { get; set; } = string.Empty;
    public bool Success { get; set; }
    public string? Uuid { get; set; }
    public string? Message { get; set; }
}