using System;
using System.IO;
using System.Numerics;
using Newtonsoft.Json;

namespace ThemeParkClicker {
    public static class SaveHandler {

        private static readonly JsonSerializer Serializer = JsonSerializer.Create(new JsonSerializerSettings {
            DefaultValueHandling = DefaultValueHandling.IgnoreAndPopulate,
            TypeNameHandling = TypeNameHandling.Auto,
            Formatting = Formatting.Indented
        });
        private const int SaveVersion = 1;

        public static void Save(GameImpl game) {
            var file = GetSaveFile(true);
            using (var stream = new JsonTextWriter(file.CreateText())) {
                var data = new SaveData {
                    SaveVersion = SaveVersion,
                    Tickets = game.Tickets,
                    LastUpdate = game.LastUpdate,
                    Map = game.Map
                };
                Serializer.Serialize(stream, data);
            }
            Console.WriteLine("Saved at " + file.FullName);
        }

        public static bool Load(GameImpl game) {
            var file = GetSaveFile(false);
            if (!file.Exists)
                return false;
            using (var stream = new JsonTextReader(file.OpenText())) {
                var data = Serializer.Deserialize<SaveData>(stream);
                game.Tickets = data.Tickets;
                game.LastUpdate = data.LastUpdate;
                game.Map = data.Map;
            }
            Console.WriteLine("Loaded from " + file.FullName);
            return true;
        }

        public static DirectoryInfo GetGameDirectory(bool create) {
            var path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
            var dir = new DirectoryInfo(Path.Combine(path, "ThemeParkClicker"));
            if (!dir.Exists && create)
                dir.Create();
            return dir;
        }

        private static FileInfo GetSaveFile(bool create) {
            return new FileInfo(Path.Combine(GetGameDirectory(create).FullName, "Save"));
        }

    }

    public class SaveData {

        public int SaveVersion;
        public BigInteger Tickets;
        public DateTime LastUpdate;
        public ParkMap Map;

    }
}