using Galaeth.Core.Infrastructure;
using Galaeth.Services.Interfaces;

namespace Galaeth.ApiServer.HostedServices;

/// <summary>
/// Processes to be executed at startup.
/// </summary>
public class StartupService : IHostedService
{
    private readonly IServiceScopeFactory _serviceScopeFactory;
    private readonly ILogger<StartupService> _logger;

    /// <summary>
    /// Initializes a new instance of the <see cref="StartupService"/> class.
    /// </summary>
    /// <param name="serviceScopeFactory">Instance of <see cref="IServiceScopeFactory"/>.</param>
    /// <param name="logger">Instance of <see cref="ILogger"/>.</param>
    public StartupService(
        IServiceScopeFactory serviceScopeFactory,
        ILogger<StartupService> logger)
    {
        _serviceScopeFactory = serviceScopeFactory;
        _logger = logger;
    }

    /// <inheritdoc />
    public async Task StartAsync(CancellationToken cancellationToken)
    {
        _logger.LogInformation("Running startup processes");
        using var scope = _serviceScopeFactory.CreateScope();

        // Database migrations.
        var dbMigrator = scope.ServiceProvider.GetRequiredService<IDatabaseMigrator>();
        await dbMigrator.MigrateDatabaseAsync(AppDomain.CurrentDomain.BaseDirectory + "Migrations");

        // DAL setup.
        var dalSetup = scope.ServiceProvider.GetService<IDataAccessLayerSetup>();
        if (dalSetup is not null)
        {
            await dalSetup.Setup();
        }

        // Email address domain blacklist update.
        var emDomainBlacklist = scope.ServiceProvider.GetRequiredService<IEmailDomainBlacklistService>();
        await emDomainBlacklist.UpdateBlacklist();

        // Initial user setup.
        var initialUserSetup = scope.ServiceProvider.GetRequiredService<IInitialUserService>();
        await initialUserSetup.CreateFirstUserIfRequiredAsync();
    }

    /// <inheritdoc />
    public Task StopAsync(CancellationToken cancellationToken)
    {
        return Task.CompletedTask;
    }
}