using FastEndpoints;
using Microsoft.AspNetCore.Http;
using MissionControl.Domain.Entities;
using MissionControl.Server.Endpoints.Missions.MissionLaunches;
using Shouldly;

namespace MissionControl.Server.Tests.Endpoints.Missions.MissionLaunches;

public class CreateMissionLaunchTests
{
    [Fact]
    public async Task Returns_not_found_when_requested_mission_does_not_exist()
    {
        using var database = new TestDatabase();
        var endpoint = Factory.Create<CreateMissionLaunch>(database.Context);
        var request = new CreateMissionLaunchRequest
        {
            MissionId = Guid.NewGuid(),
            ScheduledFor = DateTimeOffset.UtcNow,
            Status = MissionLaunchStatus.Pending,
        };

        await endpoint.HandleAsync(request, CancellationToken.None);

        endpoint.HttpContext.Response.StatusCode.ShouldBe(StatusCodes.Status404NotFound);
    }

    [Fact]
    public void Rejects_empty_mission_id_guid()
    {
        var validator = new CreateMissionLaunchRequestValidator();

        var result = validator.Validate(
            new CreateMissionLaunchRequest
            {
                MissionId = Guid.Empty,
                ScheduledFor = default,
                Status = MissionLaunchStatus.Pending,
            }
        );

        result.IsValid.ShouldBeFalse();
        result.Errors.ShouldContain(e =>
            e.PropertyName == nameof(CreateMissionLaunchRequest.MissionId)
        );
    }

    [Fact]
    public async Task Creates_mission_launch_when_request_is_valid_and_mission_exists()
    {
        var utcNow = DateTimeOffset.UtcNow;

        using var database = new TestDatabase();
        var mission = await createMission(database);

        var endpoint = Factory.Create<CreateMissionLaunch>(database.Context);
        var request = new CreateMissionLaunchRequest
        {
            MissionId = mission.Id,
            ScheduledFor = utcNow,
            Status = MissionLaunchStatus.Cancelled,
        };

        await endpoint.HandleAsync(request, CancellationToken.None);

        var response = endpoint.Response;

        endpoint.HttpContext.Response.StatusCode.ShouldBe(StatusCodes.Status200OK);
        response.Id.ShouldNotBe(Guid.Empty);
        response.ScheduledFor.ShouldBe(utcNow);
        response.Status.ShouldBe(MissionLaunchStatus.Cancelled);
    }

    private static async Task<Mission> createMission(TestDatabase database)
    {
        var mission = new Mission
        {
            Name = "new mission",
            Description = "mission description",
        };

        database.Context.Missions.Add(mission);
        await database.Context.SaveChangesAsync();

        return mission;
    }
}