using AutoMapper;
using MediatR;
using mws.backend.dotnet.application.Common;
using mws.backend.dotnet.domain.Documents;

namespace mws.backend.dotnet.application.Projects;

public record GetProjectOverviewQuery(Guid UserId, Guid ProjectId) : IRequest<ProjectOverviewDto>;

public class GetProjectOverviewHandler(IUnitOfWork uow, IMapper mapper) : IRequestHandler<GetProjectOverviewQuery, ProjectOverviewDto>
{
    public async Task<ProjectOverviewDto> Handle(GetProjectOverviewQuery query, CancellationToken ct)
    {
        var project = await ProjectAccess.GetForUserOrThrowAsync(uow, query.UserId, query.ProjectId, ct);

        var memberCount = await uow.Projects.CountMembersAsync(query.ProjectId, ct);
        var documentCount = await uow.Documents.CountByTypeForProjectAsync(query.ProjectId, DocumentType.Document, ct);

        var taskCounts = await uow.Tasks.CountByStatusForProjectAsync(query.ProjectId, ct);
        var taskCountsByStatus = taskCounts.ToDictionary(kv => kv.Key.ToString(), kv => kv.Value);

        var recentTasks = await uow.Tasks.GetRecentForProjectAsync(query.ProjectId, 5, ct);
        var recentDocuments = await uow.Documents.GetRecentForProjectAsync(query.ProjectId, DocumentType.Document, 5, ct);

        return new ProjectOverviewDto
        {
            Project = mapper.Map<ProjectDto>(project),
            MemberCount = memberCount,
            DocumentCount = documentCount,
            TaskCountsByStatus = taskCountsByStatus,
            RecentTasks = mapper.Map<List<RecentTaskDto>>(recentTasks),
            RecentDocuments = mapper.Map<List<RecentDocumentDto>>(recentDocuments),
        };
    }
}