using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging.Abstractions;
using NSubstitute;
using UniVerse.Application.DTOs.Sync;
using UniVerse.Application.Interfaces;
using UniVerse.Infrastructure.Data;
using UniVerse.Infrastructure.Services;
using Xunit;

namespace UniVerse.Api.Tests.Sync;

public class ScheduleSyncServiceTests
{
    [Fact]
    public async Task SyncScheduleAsync_UsesRoomWorkingCapacityForLectureSeats()
    {
        await using var db = CreateDbContext();
        var modeus = Substitute.For<IModeusApiClient>();
        modeus.SearchEventsAsync(Arg.Any<SyncScheduleRequest>())
            .Returns(new ModeusEventsResponse
            {
                Embedded = new ModeusEventsEmbedded
                {
                    Events =
                    [
                        new ModeusEvent
                        {
                            Id = "event-1",
                            Name = "Open lecture",
                            StartsAt = new DateTime(2026, 5, 13, 9, 0, 0, DateTimeKind.Utc),
                            EndsAt = new DateTime(2026, 5, 13, 10, 30, 0, DateTimeKind.Utc)
                        }
                    ],
                    EventRooms =
                    [
                        new ModeusEventRoom
                        {
                            Links = new ModeusEventRoomLinks
                            {
                                Event = new ModeusHrefLink("/events/event-1"),
                                Room = new ModeusHrefLink("/rooms/room-1")
                            }
                        }
                    ],
                    Rooms =
                    [
                        new ModeusRoom("room-1", "Room 101", "101", null, TotalCapacity: 60, WorkingCapacity: 42)
                    ],
                    EventTeams =
                    [
                        new ModeusEventTeam("event-1", 15)
                    ]
                }
            });

        var service = new ScheduleSyncService(db, modeus, NullLogger<ScheduleSyncService>.Instance);

        var result = await service.SyncScheduleAsync(new SyncScheduleRequest(null, null, null, null));

        var lecture = await db.Lectures.SingleAsync();
        Assert.Null(result.Error);
        Assert.Equal(1, result.Created);
        Assert.Equal(42, lecture.MaxEnrollments);
    }

    [Fact]
    public async Task SyncScheduleAsync_LoadsRoomCapacityWhenEventRoomHasNoCapacity()
    {
        await using var db = CreateDbContext();
        var modeus = Substitute.For<IModeusApiClient>();
        modeus.SearchEventsAsync(Arg.Any<SyncScheduleRequest>())
            .Returns(new ModeusEventsResponse
            {
                Embedded = new ModeusEventsEmbedded
                {
                    Events =
                    [
                        new ModeusEvent
                        {
                            Id = "event-1",
                            Name = "Open lecture",
                            StartsAt = new DateTime(2026, 5, 13, 9, 0, 0, DateTimeKind.Utc),
                            EndsAt = new DateTime(2026, 5, 13, 10, 30, 0, DateTimeKind.Utc)
                        }
                    ],
                    EventRooms =
                    [
                        new ModeusEventRoom
                        {
                            Links = new ModeusEventRoomLinks
                            {
                                Event = new ModeusHrefLink("/events/event-1"),
                                Room = new ModeusHrefLink("/rooms/room-1")
                            }
                        }
                    ],
                    Rooms =
                    [
                        new ModeusRoom("room-1", "Room 101", "101", null, TotalCapacity: null, WorkingCapacity: null)
                    ],
                    EventTeams =
                    [
                        new ModeusEventTeam("event-1", 15)
                    ]
                }
            });
        modeus.SearchRoomsAsync()
            .Returns(new ModeusRoomsResponse
            {
                Rooms =
                [
                    new ModeusRoom("room-1", "Room 101", "101", null, TotalCapacity: 60, WorkingCapacity: 48)
                ]
            });

        var service = new ScheduleSyncService(db, modeus, NullLogger<ScheduleSyncService>.Instance);

        var result = await service.SyncScheduleAsync(new SyncScheduleRequest(null, null, null, null));

        var lecture = await db.Lectures.SingleAsync();
        Assert.Null(result.Error);
        Assert.Equal(1, result.Created);
        Assert.Equal(48, lecture.MaxEnrollments);
    }

    private static AppDbContext CreateDbContext()
    {
        var options = new DbContextOptionsBuilder<AppDbContext>()
            .UseInMemoryDatabase($"ScheduleSyncTests_{Guid.NewGuid()}")
            .Options;
        return new AppDbContext(options);
    }
}