using MediatR;
using Microsoft.Extensions.Logging;
using CellularManagement.Domain.Common;
using CellularManagement.Domain.Entities.Device;
using CellularManagement.Domain.Repositories.Device;
using CellularManagement.Domain.Repositories.Base;
using CellularManagement.Domain.Services;

namespace CellularManagement.Application.Features.TestCaseSets.Commands.DisableTestCaseSet;

/// <summary>
/// 禁用用例集命令处理器
/// </summary>
public class DisableTestCaseSetCommandHandler : IRequestHandler<DisableTestCaseSetCommand, OperationResult<bool>>
{
    private readonly ITestCaseSetRepository _testCaseSetRepository;
    private readonly ILogger<DisableTestCaseSetCommandHandler> _logger;
    private readonly IUnitOfWork _unitOfWork;
    private readonly ICurrentUserService _currentUserService;

    /// <summary>
    /// 初始化命令处理器
    /// </summary>
    public DisableTestCaseSetCommandHandler(
        ITestCaseSetRepository testCaseSetRepository,
        ILogger<DisableTestCaseSetCommandHandler> logger,
        IUnitOfWork unitOfWork,
        ICurrentUserService currentUserService)
    {
        _testCaseSetRepository = testCaseSetRepository;
        _logger = logger;
        _unitOfWork = unitOfWork;
        _currentUserService = currentUserService;
    }

    /// <summary>
    /// 处理禁用用例集命令
    /// </summary>
    public async Task<OperationResult<bool>> Handle(DisableTestCaseSetCommand request, CancellationToken cancellationToken)
    {
        try
        {
            _logger.LogInformation("开始禁用用例集，用例集ID: {TestCaseSetId}", request.TestCaseSetId);

            // 检查用例集是否存在
            var existingTestCaseSet = await _testCaseSetRepository.GetTestCaseSetByIdAsync(request.TestCaseSetId, cancellationToken);
            if (existingTestCaseSet == null)
            {
                _logger.LogWarning("用例集不存在: {TestCaseSetId}", request.TestCaseSetId);
                return OperationResult<bool>.CreateFailure($"用例集ID {request.TestCaseSetId} 不存在");
            }

            // 检查用例集是否已被软删除
            if (existingTestCaseSet.IsDeleted)
            {
                _logger.LogWarning("用例集已被删除: {TestCaseSetId}", request.TestCaseSetId);
                return OperationResult<bool>.CreateFailure($"用例集ID {request.TestCaseSetId} 已被删除");
            }

            // 检查用例集是否已经禁用
            if (existingTestCaseSet.IsDisabled)
            {
                _logger.LogWarning("用例集已经禁用: {TestCaseSetId}", request.TestCaseSetId);
                return OperationResult<bool>.CreateFailure($"用例集ID {request.TestCaseSetId} 已经禁用");
            }

            // 获取当前用户ID
            var currentUserId = _currentUserService.GetCurrentUserId();
            if (string.IsNullOrEmpty(currentUserId))
            {
                _logger.LogError("无法获取当前用户ID，用户可能未认证");
                return OperationResult<bool>.CreateFailure("用户未认证，无法禁用用例集");
            }

            // 禁用用例集
            existingTestCaseSet.Disable();
            existingTestCaseSet.Update(
                code: existingTestCaseSet.Code,
                name: existingTestCaseSet.Name,
                version: existingTestCaseSet.Version,
                updatedBy: currentUserId,
                description: existingTestCaseSet.Description,
                versionUpdateInfo: existingTestCaseSet.VersionUpdateInfo,
                isDisabled: true,
                remarks: existingTestCaseSet.Remarks);

            // 保存更改
            _testCaseSetRepository.UpdateTestCaseSet(existingTestCaseSet);

            // 保存更改到数据库
            await _unitOfWork.SaveChangesAsync(cancellationToken);

            _logger.LogInformation("用例集禁用成功，用例集ID: {TestCaseSetId}, 用例集编码: {Code}, 用例集名称: {Name}, 版本: {Version}", 
                existingTestCaseSet.Id, existingTestCaseSet.Code, existingTestCaseSet.Name, existingTestCaseSet.Version);
            return OperationResult<bool>.CreateSuccess(true);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "禁用用例集时发生错误，用例集ID: {TestCaseSetId}", request.TestCaseSetId);
            return OperationResult<bool>.CreateFailure($"禁用用例集时发生错误: {ex.Message}");
        }
    }
}