using Microsoft.Data.Sqlite;
using System.Diagnostics;
using VoiceCat.Server.Data;

namespace VoiceCat.Tests;

public sealed class AccountStoreTests
{
    [Fact]
    public void UnsupportedSchemaIsRejectedWithoutCreatingAccountTables()
    {
        string path = Path.Combine(Path.GetTempPath(), "voicecat-future-" + Guid.NewGuid().ToString("N") + ".db");
        try
        {
            SQLitePCL.Batteries_V2.Init();
            using var connection = new SqliteConnection(new SqliteConnectionStringBuilder { DataSource = path, Pooling = false }.ToString());
            connection.Open();
            using var command = connection.CreateCommand();
            command.CommandText = "CREATE TABLE server_meta (key TEXT PRIMARY KEY,value TEXT NOT NULL); INSERT INTO server_meta VALUES ('schema_version','99');";
            command.ExecuteNonQuery();
            Assert.Throws<InvalidDataException>(() => new AccountStore(path));
            command.CommandText = "SELECT COUNT(*) FROM sqlite_master WHERE name='accounts'";
            Assert.Equal(0L, command.ExecuteScalar());
            command.CommandText = "SELECT value FROM server_meta WHERE key='schema_version'";
            Assert.Equal("99", command.ExecuteScalar());
        }
        finally { File.Delete(path); File.Delete(path + "-wal"); File.Delete(path + "-shm"); }
    }

    [NativeDatabaseFact]
    public async Task ExistingCppDatabaseAndManagedAccountsWorkInBothImplementations()
    {
        string directory = Path.Combine(Path.GetTempPath(), "voicecat-import-" + Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(directory);
        string path = Path.Combine(directory, "voicecat.db");
        try
        {
            await RunOracleAsync("create", path);
            using (var store = new AccountStore(path))
            {
                Account account = Assert.IsType<Account>(await store.AuthenticateAsync("legacy", "legacy password"));
                Assert.True(account.IsAdmin);
                var channel = Assert.Single(store.LoadChannels());
                Assert.Equal("Preserved native topic", channel.Topic);
                Assert.Equal(7U, channel.MaxUsers);
                Assert.Equal(32000U, channel.Audio.BitrateBps);
                await store.CreateAccountAsync("managed", "managed password", true);
            }
            await RunOracleAsync("verify", path);
        }
        finally { Directory.Delete(directory, true); }
    }

    private static async Task RunOracleAsync(string mode, string path)
    {
        var start = new ProcessStartInfo(Environment.GetEnvironmentVariable("VOICECAT_DATABASE_ORACLE")!) { UseShellExecute = false, CreateNoWindow = true };
        start.ArgumentList.Add(mode);
        start.ArgumentList.Add(path);
        using var process = Process.Start(start)!;
        using var timeout = new CancellationTokenSource(TimeSpan.FromSeconds(30));
        try { await process.WaitForExitAsync(timeout.Token); Assert.Equal(0, process.ExitCode); }
        finally { if (!process.HasExited) { process.Kill(true); await process.WaitForExitAsync(); } }
    }

    private sealed class NativeDatabaseFactAttribute : FactAttribute
    {
        public NativeDatabaseFactAttribute()
        {
            if (string.IsNullOrEmpty(Environment.GetEnvironmentVariable("VOICECAT_DATABASE_ORACLE"))) Skip = "Set VOICECAT_DATABASE_ORACLE to the native database oracle.";
        }
    }

    [Fact]
    public async Task AccountsSurviveRestartAndFailedAuthDoesNotChangeLastLogin()
    {
        string directory = Path.Combine(Path.GetTempPath(), "voicecat-db-" + Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(directory);
        string path = Path.Combine(directory, "voicecat.db");
        try
        {
            Account account;
            using (var store = new AccountStore(path)) account = await store.CreateAccountAsync("admin'", "secret", true);
            using (var store = new AccountStore(path))
            {
                Assert.Null(await store.AuthenticateAsync("admin'", "wrong"));
                Assert.Null(await store.AuthenticateAsync("missing", "secret"));
                using var connection = new SqliteConnection(new SqliteConnectionStringBuilder { DataSource = path, Pooling = false }.ToString());
                connection.Open();
                using var command = connection.CreateCommand();
                command.CommandText = "SELECT last_login FROM accounts WHERE id=$id";
                command.Parameters.AddWithValue("$id", account.Id);
                Assert.Equal(0L, command.ExecuteScalar());
                Account authenticated = Assert.IsType<Account>(await store.AuthenticateAsync("admin'", "secret"));
                Assert.Equal(account.Id, authenticated.Id);
                Assert.True(authenticated.IsAdmin);
                Assert.True(authenticated.LastLogin > 0);
            }
        }
        finally { Directory.Delete(directory, true); }
    }
}