using System;
using System.Globalization;

namespace game.PlayerDataStorage
{
    /// <summary>
    /// Immutable process-start selection. Accounts 101 and 102 are the reviewed first cohort;
    /// expanding it requires a new complete migration design review.
    /// </summary>
    internal sealed class PlayerKVRuntimeSelection
    {
        internal const string FormalApiUrl = "http://s101.local:18080/";

        internal bool IsKV { get; }
        internal Uri Api { get; }

        private PlayerKVRuntimeSelection(bool isKV, Uri api)
        {
            IsKV = isKV;
            Api = api;
        }

        internal static PlayerKVRuntimeSelection Capture(string backend, string api, bool agg)
        {
            if (backend == null || backend == "playfab")
                return new PlayerKVRuntimeSelection(false, null);
            if (backend != "kv")
                throw new ArgumentException("Unsupported save backend.", nameof(backend));
            if (!string.Equals(api, FormalApiUrl, StringComparison.Ordinal))
                throw new ArgumentException("KV API address does not match the reviewed endpoint.", nameof(api));
            return new PlayerKVRuntimeSelection(true, new Uri(FormalApiUrl));
        }

        internal bool TryAdmitPlayer(string requestedId, out string canonicalId)
        {
            canonicalId = null;
            if (!IsKV || !long.TryParse(requestedId, NumberStyles.None, CultureInfo.InvariantCulture, out var id) ||
                (id != 101 && id != 102)) return false;
            canonicalId = id.ToString(CultureInfo.InvariantCulture);
            return true;
        }
    }
}