using AutoMapper;
using DigitalData.EmailProfiler.Application.Common.Dtos.EmailHistories;
using DigitalData.EmailProfiler.Application.Interfaces.Repositories;
using MediatR;

namespace DigitalData.EmailProfiler.Application.EmailHistories.Queries;

/// <summary>
/// Query to get email history by profile with pagination.
/// </summary>
public record GetEmailHistoryByProfileQuery(
    int ProfileId,
    int PageNumber = 1,
    int PageSize = 50) : IRequest<EmailHistoryPagedResult>;

/// <summary>
/// Paged result for email history.
/// </summary>
public record EmailHistoryPagedResult(
    IEnumerable<EmailHistoryDto> Items,
    int TotalCount,
    int PageNumber,
    int PageSize);

public class GetEmailHistoryByProfileQueryHandler(
    IEmailHistoryRepository repository,
    IMapper mapper) 
    : IRequestHandler<GetEmailHistoryByProfileQuery, EmailHistoryPagedResult>
{
    public async Task<EmailHistoryPagedResult> Handle(
        GetEmailHistoryByProfileQuery request, 
        CancellationToken cancellationToken)
    {
        var (items, totalCount) = await repository.GetByProfileIdAsync(
            request.ProfileId,
            request.PageNumber,
            request.PageSize,
            cancellationToken);

        var dtos = mapper.Map<IEnumerable<EmailHistoryDto>>(items);

        return new EmailHistoryPagedResult(
            dtos,
            totalCount,
            request.PageNumber,
            request.PageSize);
    }
}