using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Data.Sqlite;
using Microsoft.Extensions.Options;
using Xunit;

namespace ServerMonitorManager.Control.Tests;

public sealed class SchemaCompatibilityTests
{
    [Fact]
    public async Task CanOpenAlpha7DatabaseWithoutReapplyingMigrations()
    {
        // Try to find the alpha7.db file which should be generated by CI
        var dbPath = Path.GetFullPath(Path.Combine(System.AppContext.BaseDirectory, "..", "..", "..", "..", "..", "tests", "acceptance", "alpha7.db"));

        if (!File.Exists(dbPath))
        {
            // Skip the test locally if the file hasn't been generated
            return;
        }

        // 1. Verify PRAGMA user_version is readable and hasn't changed abruptly
        await using var connection = new SqliteConnection($"Data Source={dbPath}");
        await connection.OpenAsync();
        var command = connection.CreateCommand();
        command.CommandText = "PRAGMA user_version;";
        var userVersion = Convert.ToInt64(await command.ExecuteScalarAsync());

        Assert.True(userVersion > 0, "Database user_version should be greater than 0");

        // 2. Open it with the current ControlStore to see if data reads correctly and it doesn't crash
        var store = new ControlStore(Options.Create(new ControlOptions { DatabasePath = dbPath }));
        await store.InitializeAsync(CancellationToken.None);

        // 3. Test that we can read from it
        var links = await store.ListEffectiveLinksForNodeAsync("nonexistent", CancellationToken.None);
        Assert.Empty(links);

    }
}