using IronServices.Client;

namespace IronServices.Maui.Services;

/// <summary>
/// MAUI implementation of ITokenStorage using SecureStorage.
/// Securely stores authentication tokens on the device.
/// </summary>
public class MauiSecureTokenStorage : ITokenStorage
{
    private const string SessionTokenKey = "ironservices_session_token";
    private const string TokenExpiryKey = "ironservices_token_expiry";

    public async Task SaveTokenAsync(string token, DateTime? expiresAt)
    {
        try
        {
            await SecureStorage.Default.SetAsync(SessionTokenKey, token);
            if (expiresAt.HasValue)
            {
                await SecureStorage.Default.SetAsync(TokenExpiryKey, expiresAt.Value.ToString("O"));
            }
            else
            {
                SecureStorage.Default.Remove(TokenExpiryKey);
            }
        }
        catch (Exception)
        {
            // SecureStorage may not be available on all platforms
        }
    }

    public async Task<(string? Token, DateTime? ExpiresAt)> GetTokenAsync()
    {
        try
        {
            var token = await SecureStorage.Default.GetAsync(SessionTokenKey);
            DateTime? expiresAt = null;

            var expiryStr = await SecureStorage.Default.GetAsync(TokenExpiryKey);
            if (DateTime.TryParse(expiryStr, out var expiry))
            {
                expiresAt = expiry;
            }

            return (token, expiresAt);
        }
        catch (Exception)
        {
            return (null, null);
        }
    }

    public Task ClearTokenAsync()
    {
        try
        {
            SecureStorage.Default.Remove(SessionTokenKey);
            SecureStorage.Default.Remove(TokenExpiryKey);
        }
        catch (Exception)
        {
            // Ignore
        }
        return Task.CompletedTask;
    }
}