using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;
using SiteStatus.Business;
using SiteStatus.Dbo;

namespace SiteStatus.Controllers
{

    [Route("api/[controller]")]
    [ApiController]
    public class StatusController : SSController
    {
        protected HostBusiness HostBusiness { get; }
        public DnsBusiness DnsBusiness { get; }

        public SettingsDbo Options { get; }

        public StatusController(HostBusiness hostBusiness, DnsBusiness dnsBusiness, IOptions<SettingsDbo> options)
        {
            HostBusiness = hostBusiness;
            DnsBusiness = dnsBusiness;
            Options = options.Value;
        }

        [HttpGet("/api/[controller]/hosts")]
        public ApiResultDbo<List<SiteDbo>> GetHosts()
        {
            var sites = Options.VpnS2s.Sites.Select(site => new SiteDbo
            {
                Name = string.IsNullOrEmpty(site.Name) ? null : site.Name,
                Hosts = site.Hosts.Select(host => new HostDbo
                {
                    HostStatus = null,
                    Ip = host.Ip
                }).ToList()
            }).ToList();

            var hosts = sites.SelectMany(site => site.Hosts).ToList();
            var tasks = hosts.Select(host => HostBusiness.GetHostStatusAsync(host.Ip, Options.VpnS2s.Ping.Count, Options.VpnS2s.Ping.Timeout)).ToArray();

            Task.WaitAll(tasks);

            foreach (var task in tasks)
            {
                hosts.First(host => host.Ip == task.Result.Ip.ToString()).HostStatus = task.Result;
            }

            return Handle(sites);
        }

        [HttpGet("/api/[controller]/dns")]
        public ApiResultDbo<List<DnsZoneStatusDbo>> GetDns()
        {
            var servers = Options.Dns.Servers.Select(server => server.Ip).ToList();
            var tasks = Options.Dns.Zones.Select(zone => DnsBusiness.GetZoneStatusAsync(zone.Name, servers)).ToArray();

            Task.WaitAll(tasks);

            var results = tasks.Select(task => task.Result).ToList();

            return Handle(results);
        }
    }
}