using System.Text.Json;
using Microsoft.Data.SqlClient;
using Microsoft.EntityFrameworkCore;
using RadicadeServer.API.Notifications;
using RadicadeServer.DB;
using RadicadeServer.RecNet.Enums.Messages;
using RadicadeServer.RecNet.Messages;
using Xunit;

namespace RadicadeServer.Tests;

public sealed class SqlServerInviteFactAttribute : FactAttribute
{
    public SqlServerInviteFactAttribute()
    {
        if (string.IsNullOrWhiteSpace(Environment.GetEnvironmentVariable("RADICADE_SQL_TEST_CONNECTION")))
            Skip = "Set RADICADE_SQL_TEST_CONNECTION to a SQL Server with permission to create a scratch database.";
    }
}

[Collection(DbFactoryCollection.Name)]
public class SqlServerInvitePersistenceTests
{
    private sealed class Factory(string connection) : IDbContextFactory<RecDBContext>
    {
        public RecDBContext CreateDbContext() => new(TestDbOptions.Create()
            .UseSqlServer(connection, sql => sql.EnableRetryOnFailure(3)).Options);
    }

    [SqlServerInviteFact]
    public async Task InvitePayloadCommitsWithSqlServerRetriesEnabled()
    {
        // Never write test invitations into the user's database or notify real players.
        var database = "RadicadeInviteTest_" + Guid.NewGuid().ToString("N");
        var connection = new SqlConnectionStringBuilder(
            Environment.GetEnvironmentVariable("RADICADE_SQL_TEST_CONNECTION"));
        connection.InitialCatalog = "master";
        await using var admin = new SqlConnection(connection.ConnectionString);
        await admin.OpenAsync();
        await using (var create = new SqlCommand($"CREATE DATABASE [{database}]", admin))
            await create.ExecuteNonQueryAsync();
        var previous = Notify.DbFactory;
        try
        {
            connection.InitialCatalog = database;
            var factory = new Factory(connection.ConnectionString);
            await using var db = factory.CreateDbContext();
            await db.Database.ExecuteSqlRawAsync("""
                CREATE TABLE [Messages] (
                    [Id] bigint IDENTITY PRIMARY KEY,
                    [FromPlayerId] bigint NOT NULL, [ToPlayerId] bigint NOT NULL,
                    [SentTime] datetime2 NOT NULL, [Type] int NOT NULL,
                    [Data] nvarchar(max) NOT NULL, [Details] nvarchar(max) NOT NULL,
                    [RoomId] bigint NULL, [PlayerEventId] bigint NULL,
                    [IsDismissed] bit NOT NULL);
                """);
            Notify.DbFactory = factory;
            var message = new Message
            {
                FromPlayerId = long.MaxValue - 1, RoomId = 45, Type = MessageType.GameInviteV2
            };
            await Notify.SendMessage(long.MaxValue, message, prepareWithId: stored =>
                stored.Data = JsonSerializer.Serialize(new RoomInviteDetails
                {
                    InviteId = stored.Id, Name = "SQL invite test", RoomInstanceId = 123
                }));
            var saved = await db.Messages.AsNoTracking().SingleAsync();
            Assert.True(saved.Id > 0);
            Assert.Equal(saved.Id, JsonSerializer.Deserialize<RoomInviteDetails>(saved.Data)!.InviteId);
            Assert.Equal(123L, RoomInviteDetails.GetInstanceId(saved));
            Assert.Equal(long.MaxValue, saved.ToPlayerId);
        }
        finally
        {
            Notify.DbFactory = previous;
            SqlConnection.ClearAllPools();
            await using var drop = new SqlCommand(
                $"ALTER DATABASE [{database}] SET SINGLE_USER WITH ROLLBACK IMMEDIATE; DROP DATABASE [{database}]", admin);
            await drop.ExecuteNonQueryAsync();
        }
    }
}