using FluentAssertions;
using NSubstitute;
using SIGCM2.Application.Abstractions.Persistence;
using SIGCM2.Application.Pricing.ChargeableChars.GetById;
using SIGCM2.Domain.Pricing.ChargeableChars;

namespace SIGCM2.Application.Tests.Pricing.ChargeableChars;

/// <summary>
/// PRC-001 — GetChargeableCharConfigByIdQueryHandler tests.
/// Covers: found → returns DTO, not-found → returns null.
/// </summary>
public class GetChargeableCharConfigByIdHandlerTests
{
    private readonly IChargeableCharConfigRepository _repo = Substitute.For<IChargeableCharConfigRepository>();
    private readonly GetChargeableCharConfigByIdQueryHandler _handler;

    private static readonly DateOnly Today = new(2026, 4, 20);

    public GetChargeableCharConfigByIdHandlerTests()
    {
        _handler = new GetChargeableCharConfigByIdQueryHandler(_repo);
    }

    private static ChargeableCharConfig MakeConfig(long id) =>
        ChargeableCharConfig.Rehydrate(id, null, "$", ChargeableCharCategories.Currency, 1.0m, Today, null, true);

    // ── Found ───────────────────────────────────────────────────────────────────

    [Fact]
    public async Task Handle_Found_ReturnsDto()
    {
        _repo.GetByIdAsync(1L, Arg.Any<CancellationToken>())
            .Returns(MakeConfig(1L));

        var result = await _handler.Handle(new GetChargeableCharConfigByIdQuery(1L));

        result.Should().NotBeNull();
        result!.Id.Should().Be(1L);
        result.Symbol.Should().Be("$");
        result.PricePerUnit.Should().Be(1.0m);
        result.ValidFrom.Should().Be(Today);
        result.IsActive.Should().BeTrue();
    }

    // ── Not found ───────────────────────────────────────────────────────────────

    [Fact]
    public async Task Handle_NotFound_ReturnsNull()
    {
        _repo.GetByIdAsync(99L, Arg.Any<CancellationToken>())
            .Returns((ChargeableCharConfig?)null);

        var result = await _handler.Handle(new GetChargeableCharConfigByIdQuery(99L));

        result.Should().BeNull();
    }
}