using System;
using UnityEngine;
using UnityGameFramework.Runtime;

namespace SepCore.InputModule.Runtime
{
    public static class BindingOverridePersistence
    {
        public const int CurrentVersion = 2;

        [Serializable]
        private class Container
        {
            public int version;
            public string payload;
        }

        public static string Serialize(string overridesJson)
        {
            Container container = new Container { version = CurrentVersion, payload = overridesJson };
            return JsonUtility.ToJson(container);
        }

        public static bool TryDeserialize(string storedData, out string overridesJson)
        {
            overridesJson = null;
            if (string.IsNullOrWhiteSpace(storedData))
            {
                return false;
            }

            string trimmed = storedData.TrimStart();

            if (trimmed.StartsWith("["))
            {
                overridesJson = storedData;
                return true;
            }

            if (trimmed.StartsWith("{"))
            {
                Container container;
                try
                {
                    container = JsonUtility.FromJson<Container>(storedData);
                }
                catch (ArgumentException)
                {
                    Log.Warning("[InputModule] Binding overrides data is corrupted. Skipping load.");
                    return false;
                }

                if (container == null)
                {
                    Log.Warning("[InputModule] Binding overrides data is corrupted. Skipping load.");
                    return false;
                }

                if (container.version > CurrentVersion)
                {
                    Log.Warning("[InputModule] Binding overrides data version {0} is newer than supported version {1}. Skipping load.",
                        container.version, CurrentVersion);
                    return false;
                }

                overridesJson = container.payload;
                return true;
            }

            Log.Warning("[InputModule] Unrecognized binding overrides data format. Skipping load.");
            return false;
        }
    }
}