using X1.Domain.Common;
using X1.Domain.Repositories.TestCase;
using Microsoft.Extensions.Logging;
using MediatR;

namespace X1.Application.Features.TestCaseFlow.Queries.GetTestCaseFlows;

/// <summary>
/// 获取测试用例流程列表查询处理器
/// </summary>
public class GetTestCaseFlowsQueryHandler : IRequestHandler<GetTestCaseFlowsQuery, OperationResult<GetTestCaseFlowsResponse>>
{
    private readonly ITestCaseFlowRepository _testCaseFlowRepository;
    private readonly ILogger<GetTestCaseFlowsQueryHandler> _logger;

    /// <summary>
    /// 初始化查询处理器
    /// </summary>
    public GetTestCaseFlowsQueryHandler(
        ITestCaseFlowRepository testCaseFlowRepository,
        ILogger<GetTestCaseFlowsQueryHandler> logger)
    {
        _testCaseFlowRepository = testCaseFlowRepository;
        _logger = logger;
    }

    /// <summary>
    /// 处理获取测试用例流程列表查询
    /// </summary>
    public async Task<OperationResult<GetTestCaseFlowsResponse>> Handle(GetTestCaseFlowsQuery request, CancellationToken cancellationToken)
    {
        try
        {
            _logger.LogInformation("开始获取测试用例流程列表，搜索条件: {SearchTerm}, 类型: {Type}, 启用状态: {IsEnabled}, 页码: {PageNumber}, 每页大小: {PageSize}",
                request.SearchTerm, request.Type, request.IsEnabled, request.PageNumber, request.PageSize);

            // 解析流程类型
            X1.Domain.Entities.TestCase.TestFlowType? flowType = null;
            if (!string.IsNullOrEmpty(request.Type) && Enum.TryParse<X1.Domain.Entities.TestCase.TestFlowType>(request.Type, out var parsedType))
            {
                flowType = parsedType;
            }

            // 获取分页数据
            var pagedResult = await _testCaseFlowRepository.GetPagedFlowsAsync(
                name: request.SearchTerm,
                type: flowType,
                isEnabled: request.IsEnabled,
                pageNumber: request.PageNumber,
                pageSize: request.PageSize,
                cancellationToken);

            // 构建响应
            var response = new GetTestCaseFlowsResponse
            {
                TestCaseFlows = pagedResult.Items.Select(flow => new TestCaseFlowDto
                {
                    Id = flow.Id,
                    Name = flow.Name,
                    Description = flow.Description,
                    Type = flow.Type.ToString(),
                    IsEnabled = flow.IsEnabled,
                    ViewportX = flow.ViewportX,
                    ViewportY = flow.ViewportY,
                    ViewportZoom = flow.ViewportZoom,
                    CreatedAt = flow.CreatedAt,
                    CreatedBy = flow.CreatedBy,
                    UpdatedAt = flow.UpdatedAt,
                    UpdatedBy = flow.UpdatedBy
                }).ToList(),
                TotalCount = pagedResult.TotalCount,
                PageNumber = request.PageNumber,
                PageSize = request.PageSize,
                TotalPages = (int)Math.Ceiling((double)pagedResult.TotalCount / request.PageSize)
            };

            _logger.LogInformation("成功获取测试用例流程列表，总数: {TotalCount}, 当前页: {PageNumber}, 每页大小: {PageSize}",
                response.TotalCount, response.PageNumber, response.PageSize);

            return OperationResult<GetTestCaseFlowsResponse>.CreateSuccess(response);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "获取测试用例流程列表时发生错误");
            return OperationResult<GetTestCaseFlowsResponse>.CreateFailure("获取测试用例流程列表失败，请稍后重试");
        }
    }
}