using IronLicensing.Client.Models;

namespace IronLicensing.Client;

public interface ILicenseManager
{
    // State
    LicenseInfo? CurrentLicense { get; }
    LicenseStatus Status { get; }
    bool IsLicensed { get; }
    bool IsTrial { get; }
    int TrialDaysRemaining { get; }

    // Events
    event EventHandler<LicenseChangedEventArgs>? LicenseChanged;
    event EventHandler<LicenseValidationEventArgs>? ValidationCompleted;

    // Operations
    Task<LicenseResult> ValidateAsync(string? licenseKey = null);
    Task<LicenseResult> ActivateAsync(string licenseKey);
    Task<bool> DeactivateAsync();
    Task<CheckoutResult> StartPurchaseAsync(string tierId, string customerEmail);

    // Feature Gating
    bool HasFeature(string featureKey);
    Task<bool> HasFeatureAsync(string featureKey);
    void RequireFeature(string featureKey);

    // Trial
    Task<bool> StartTrialAsync(string email);

    // Cache management
    Task ClearCacheAsync();
}

public class LicenseChangedEventArgs : EventArgs
{
    public LicenseInfo? OldLicense { get; init; }
    public LicenseInfo? NewLicense { get; init; }
}

public class LicenseValidationEventArgs : EventArgs
{
    public bool Success { get; init; }
    public LicenseInfo? License { get; init; }
    public string? ErrorCode { get; init; }
    public string? ErrorMessage { get; init; }
}