using AspNetCoreRateLimit;
using Microsoft.Extensions.Hosting;

namespace Bit.Core.HostedServices
{
    /// <summary>
    /// A startup service that will seed the IP rate limiting stores with any values in the
    /// GlobalSettings configuration.
    /// </summary>
    /// <remarks>
    /// <para>Using an <see cref="IHostedService"/> here because it runs before the request processing pipeline
    /// is configured, so that any rate limiting configuration is seeded/applied before any requests come in.
    /// </para>
    /// <para>
    /// This is a cleaner alternative to modifying Program.cs in every project that requires rate limiting as
    /// described/suggested here:
    /// https://github.com/stefanprodan/AspNetCoreRateLimit/wiki/Version-3.0.0-Breaking-Changes
    /// </para>
    /// </remarks>
    public class IpRateLimitSeedStartupService : IHostedService
    {
        private readonly IIpPolicyStore _ipPolicyStore;
        private readonly IClientPolicyStore _clientPolicyStore;

        public IpRateLimitSeedStartupService(IIpPolicyStore ipPolicyStore, IClientPolicyStore clientPolicyStore)
        {
            _ipPolicyStore = ipPolicyStore;
            _clientPolicyStore = clientPolicyStore;
        }

        public async Task StartAsync(CancellationToken cancellationToken)
        {
            // Seed the policies from GlobalSettings
            await _ipPolicyStore.SeedAsync();
            await _clientPolicyStore.SeedAsync();
        }

        // noop
        public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
    }
}