using System;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using AyaNova.Util;

using System.Net.Http;
using Newtonsoft.Json.Linq;

namespace AyaNova.Biz
{


    /// <summary>
    /// called by Generator to check new releases automatically
    /// 
    /// </summary>
    internal static class CoreJobVersionCheck
    {
        private static ILogger log = AyaNova.Util.ApplicationLogging.CreateLogger("CoreJobVersionCheck");
        private static DateTime _lastCheck = DateTime.MinValue;
        private static TimeSpan CHECK_INTERVAL = new TimeSpan(24, 0, 0);//every day
                                                                      
        ////////////////////////////////////////////////////////////////////////////////////////////////
        // DoWork
        //
        public static async Task DoWorkAsync()
        {
            if (DateTime.UtcNow - _lastCheck < CHECK_INTERVAL)
                return;
            log.LogDebug("Check starting");           
            try
            {

                var client = ServiceProviderProvider.HttpClientFactory.CreateClient();
                var res = await client.GetAsync("https://ayanova.com/download/latest-version.json");
                string responseText = string.Empty;

                if (res.IsSuccessStatusCode)
                {
                    responseText = await res.Content.ReadAsStringAsync();
                    var responseJson = JObject.Parse(responseText);
                    //validate contains version string and that it appears to be valid
                    if (responseJson.ContainsKey("latestversion"))
                    {
                        var v = responseJson["latestversion"].Value<string>();
                        if (v.Contains("."))
                        {
                            ServerGlobalOpsSettingsCache.LATEST_VERSION = v;
                        }
                        else
                        {
                            log.LogDebug($"version json response latestversion missing or malformed, response was: {responseText}");
                        }
                    }
                    else
                    {
                        log.LogDebug($"version json response latestversion missing or malformed, response was: {responseText}");
                    }



                    if (responseJson.ContainsKey("changelogurl"))
                    {
                        var u = responseJson["changelogurl"].Value<string>();
                        if (u.Contains("http"))
                        {
                            ServerGlobalOpsSettingsCache.CHANGE_LOG_URL = u;
                        }
                        else
                        {
                            log.LogDebug($"version json response changelogurl missing or malformed, response was: {responseText}");
                        }
                    }
                    else
                    {
                        log.LogDebug($"version json response changelogurl missing or malformed, response was: {responseText}");
                    }

                }
                else
                {
                    log.LogWarning($"Error checking AyaNova website for updated release version: {res.ReasonPhrase},{responseText}");
                }
            }
            catch (Exception ex)
            {

                log.LogError(ex, "Error checking AyaNova website for updated version");
            }
            finally
            {
                _lastCheck = DateTime.UtcNow;
            }

        }
        /////////////////////////////////////////////////////////////////////
    }//eoc
}//eons