using Microsoft.Extensions.Diagnostics.HealthChecks;
using Microsoft.Extensions.Options;
using BCards.Web.Configuration;
using Stripe;
using System.Diagnostics;

namespace BCards.Web.HealthChecks;

public class StripeHealthCheck : IHealthCheck
{
    private readonly StripeSettings _stripeSettings;
    private readonly ILogger<StripeHealthCheck> _logger;

    public StripeHealthCheck(IOptions<StripeSettings> stripeSettings, ILogger<StripeHealthCheck> logger)
    {
        _stripeSettings = stripeSettings.Value;
        _logger = logger;
    }

    public async Task<HealthCheckResult> CheckHealthAsync(
        HealthCheckContext context,
        CancellationToken cancellationToken = default)
    {
        var stopwatch = Stopwatch.StartNew();

        try
        {
            // Configura Stripe temporariamente para o teste
            StripeConfiguration.ApiKey = _stripeSettings.SecretKey;
            
            // Testa conectividade listando produtos (limite 1 para ser rápido)
            var productService = new ProductService();
            var options = new ProductListOptions { Limit = 1 };
            
            await productService.ListAsync(options, cancellationToken: cancellationToken);
            
            stopwatch.Stop();
            var duration = stopwatch.ElapsedMilliseconds;

            _logger.LogInformation("Stripe health check completed successfully in {Duration}ms", duration);

            var data = new Dictionary<string, object>
            {
                { "status", "healthy" },
                { "duration", $"{duration}ms" },
                { "api_key_prefix", _stripeSettings.SecretKey?.Substring(0, Math.Min(12, _stripeSettings.SecretKey.Length)) + "..." },
                { "latency", duration }
            };

            // Status baseado na latência
            if (duration > 10000) // > 10s
                return HealthCheckResult.Unhealthy($"Stripe response time too high: {duration}ms", data: data);
            
            if (duration > 5000) // > 5s
                return HealthCheckResult.Degraded($"Stripe response time elevated: {duration}ms", data: data);

            return HealthCheckResult.Healthy($"Stripe API is responsive ({duration}ms)", data: data);
        }
        catch (StripeException stripeEx)
        {
            stopwatch.Stop();
            var duration = stopwatch.ElapsedMilliseconds;

            _logger.LogError(stripeEx, "Stripe health check failed after {Duration}ms: {Error}", duration, stripeEx.Message);

            var data = new Dictionary<string, object>
            {
                { "status", "unhealthy" },
                { "duration", $"{duration}ms" },
                { "error", stripeEx.Message },
                { "error_code", stripeEx.StripeError?.Code ?? "unknown" },
                { "error_type", stripeEx.StripeError?.Type ?? "unknown" }
            };

            return HealthCheckResult.Unhealthy($"Stripe API error: {stripeEx.Message}", stripeEx, data);
        }
        catch (Exception ex)
        {
            stopwatch.Stop();
            var duration = stopwatch.ElapsedMilliseconds;

            _logger.LogError(ex, "Stripe health check failed after {Duration}ms", duration);

            var data = new Dictionary<string, object>
            {
                { "status", "unhealthy" },
                { "duration", $"{duration}ms" },
                { "error", ex.Message }
            };

            return HealthCheckResult.Unhealthy($"Stripe connection failed: {ex.Message}", ex, data);
        }
    }
}