using BuildFlow.Shared.Domain.Errors;
using BuildFlow.Shared.Domain.Exceptions;
using FluentAssertions;
using IM.Application.Chat.Commands;
using IM.Application.Chat.Handlers;
using IM.Domain.Enums;
using IM.Infrastructure.Persistence;
using Microsoft.EntityFrameworkCore;
using Xunit;

namespace BuildFlow.IM.Tests.Chat;

/// <summary>
/// SetConversationRemarkCommandHandler：成功置备注 / 空白清空备注 / 参与者不存在抛 NotFound。
/// </summary>
public class SetConversationRemarkCommandHandlerTests
{
    private static readonly Guid UserId = Guid.Parse("22222222-2222-2222-2222-222222222222");
    private static readonly Guid ConvId = Guid.Parse("11111111-1111-1111-1111-111111111111");

    [Fact]
    public async Task Sets_remark_for_participant()
    {
        await using var db = IMTestDb.Create();
        db.Conversations.Add(ImTestData.BuildConversation(ConvId, ConversationTypeEnum.Private, (UserId, 0)));
        await db.SaveChangesAsync();

        var handler = new SetConversationRemarkCommandHandler(db);
        await handler.Handle(new SetConversationRemarkCommand(ConvId, UserId, "老板"), CancellationToken.None);

        var p = await db.ConversationParticipants.FirstAsync(x => x.ConversationId == ConvId && x.UserId == UserId);
        p.Remark.Should().Be("老板");
    }

    [Fact]
    public async Task Clears_remark_when_blank()
    {
        await using var db = IMTestDb.Create();
        db.Conversations.Add(ImTestData.BuildConversation(ConvId, ConversationTypeEnum.Private, (UserId, 0)));
        await db.SaveChangesAsync();

        var handler = new SetConversationRemarkCommandHandler(db);
        await handler.Handle(new SetConversationRemarkCommand(ConvId, UserId, ""), CancellationToken.None);

        var p = await db.ConversationParticipants.FirstAsync(x => x.ConversationId == ConvId && x.UserId == UserId);
        p.Remark.Should().BeNull();
    }

    [Fact]
    public async Task Throws_not_found_when_participant_missing()
    {
        await using var db = IMTestDb.Create();
        var handler = new SetConversationRemarkCommandHandler(db);
        var act = async () => await handler.Handle(new SetConversationRemarkCommand(ConvId, UserId, "x"), CancellationToken.None);

        var ex = await act.Should().ThrowAsync<NotFoundException>();
        ex.Which.Code.Should().Be(ErrorCode.NotFound);
    }
}