using System.Text.Json;
using MediatR;
using Nashel.BuildingBlocks.Application.Abstractions;
using Nashel.Modules.Catalog.Domain.Aggregates;
using Nashel.Modules.Catalog.Domain.Repositories;
using Nashel.Modules.Catalog.Domain.ValueObjects;

namespace Nashel.Modules.Catalog.Application.Commands;

public record UpdateOfferCommand(
    Guid OfferId,
    string Title,
    string Description,
    decimal PriceAmount,
    int PriceType, // 0-Fixed, 1-Hourly, 2-Negotiable
    Dictionary<string, string>? Attributes,
    List<string>? Images) : IRequest<bool>;

public class UpdateOfferCommandHandler : IRequestHandler<UpdateOfferCommand, bool>
{
    private readonly IOfferRepository _repository;
    private readonly ICurrentUserService _currentUser;

    public UpdateOfferCommandHandler(IOfferRepository repository, ICurrentUserService currentUser)
    {
        _repository = repository;
        _currentUser = currentUser;
    }

    public async Task<bool> Handle(UpdateOfferCommand request, CancellationToken cancellationToken)
    {
        var offer = await _repository.GetByIdAsync(request.OfferId, cancellationToken);
        if (offer == null) throw new Exception("Offer not found");

        if (offer.PerformerId != _currentUser.UserId)
            throw new UnauthorizedAccessException("Not your offer");

        var price = new Price(request.PriceAmount, (Nashel.Modules.Catalog.Domain.Enums.OfferType)request.PriceType);
        var jsonAttrs = request.Attributes != null && request.Attributes.Count > 0
            ? JsonDocument.Parse(JsonSerializer.Serialize(request.Attributes))
            : null;

        offer.Update(request.Title, request.Description, price, jsonAttrs, request.Images);

        await _repository.UpdateAsync(offer, cancellationToken);
        return true;
    }
}