using System;
using System.Threading.Tasks;
using MediaBrowser.Model.Logging;

namespace NFOGuard.Emby.Plugin
{
    public class LicenseManager
    {
        private readonly ILogger _logger;

        public LicenseManager(ILogger logger)
        {
            _logger = logger;
        }

        public async Task<bool> ValidateLicenseAsync(string licenseKey)
        {
            try
            {
                // TODO: Implement actual license validation
                // For now, return true for testing
                // In production, this would call your licensing server
                
                if (string.IsNullOrEmpty(licenseKey))
                {
                    _logger.Info("NFOGuard :: No license key provided, running in trial mode");
                    return false;
                }

                // Placeholder for license validation logic
                // You would implement your own licensing server/API here
                _logger.Info($"NFOGuard :: Validating license key: {licenseKey.Substring(0, Math.Min(8, licenseKey.Length))}...");
                
                // For now, accept any non-empty key as valid
                return !string.IsNullOrWhiteSpace(licenseKey);
            }
            catch (Exception ex)
            {
                _logger.ErrorException("NFOGuard :: License validation error", ex);
                return false;
            }
        }

        public bool IsTrialExpired()
        {
            // Implement trial logic here
            // For example, check installation date vs current date
            var installDate = Plugin.Instance.Configuration.InstallDate;
            if (installDate == DateTime.MinValue)
            {
                Plugin.Instance.Configuration.InstallDate = DateTime.UtcNow;
                Plugin.Instance.SaveConfiguration();
                return false;
            }

            var trialDays = 30; // 30-day trial
            return DateTime.UtcNow > installDate.AddDays(trialDays);
        }

        public bool CanUseFeature()
        {
            // Check if license is valid or trial is still active
            return Plugin.Instance.Configuration.LicenseValid || !IsTrialExpired();
        }
    }
}