using Newtonsoft.Json;
using System.Linq;

namespace ttrss_co_client
{
    class Program
    {
        static async Task Main(string[] args)
        {
            var conf = Configure();
            var ttrssClient = new ttrss.ApiClient(conf.BaseURI);
            await ttrssClient.Login(conf.Username, conf.Password);

            var loggedin = await ttrssClient.IsLoggedIn();
            Console.WriteLine($"logged in: {loggedin}");

            var apiLevel = await ttrssClient.GetApiLevel();
            Console.WriteLine($"api level: {apiLevel}");

            var feeds = await ttrssClient.GetFeeds(cat_id: -3);
            Console.WriteLine($"{feeds.Count()} feed{(feeds.Count() == 1 ? "" : "s")} found");
            var firstUnread = feeds.FirstOrDefault(f => f.unread > 0);
            if(firstUnread != null)
            {
                Console.WriteLine($"first unread: {firstUnread.title} (id {firstUnread.id})");
            }
            else
            {
                Console.WriteLine("no feeds unread.");
            }

            var loggedout = await ttrssClient.Logout();
            Console.WriteLine($"logged out: {loggedout}");

             loggedin = await ttrssClient.IsLoggedIn();
            Console.WriteLine($"logged in: {loggedin}");
        }
        static Configuration Configure(string configurationPath = "appsettings.json")
        {
            if (!File.Exists(configurationPath))
            {
                Console.Error.WriteLine($"could not find configuration at {configurationPath}! copying sample to that spot.");
                File.Copy("sample-appsettings.json", configurationPath); //and you know what, if that explodes at the OS level, the OS should give you an error
                return null;
            }
            var fileContents = File.ReadAllText(configurationPath);
            if (string.IsNullOrWhiteSpace(fileContents))
            {
                Console.Error.WriteLine($"configuration file at {configurationPath} was empty! overwriting with sample settings.");
                File.Copy("sample-appsettings.json", configurationPath, true);
                return null;
            }

            var conf = JsonConvert.DeserializeObject<Configuration>(fileContents);

            if (conf == null)
            {
                Console.Error.WriteLine($"configuration file at {configurationPath} was empty! overwriting with sample settings.");
                File.Copy("sample-appsettings.json", configurationPath, true);
                return null;
            }

            return conf;
        }

    }
}