using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Configuration;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Routing;

namespace MarketAlly.AIPlugin.ClaudeCode;

/// <summary>
/// Extension methods for registering Claude Code services
/// </summary>
public static class ServiceCollectionExtensions
{
    /// <summary>
    /// Adds Claude Code integration services to the dependency injection container
    /// </summary>
    /// <param name="services">The service collection</param>
    /// <param name="configuration">Configuration instance</param>
    /// <returns>The service collection for chaining</returns>
    public static IServiceCollection AddClaudeCodeIntegration(
        this IServiceCollection services, 
        IConfiguration configuration)
    {
        // Register configuration
        services.Configure<ClaudeCodeOptions>(configuration.GetSection("ClaudeCode"));
        services.Configure<RateLimitOptions>(configuration.GetSection("ClaudeCode:RateLimiting"));
        services.Configure<LearningOptions>(configuration.GetSection("ClaudeCode:Learning"));

        // Register core services
        services.AddScoped<IClaudeCodeService, ClaudeCodeService>();
        services.AddScoped<IContextClaudeService, ContextClaudeService>();
        services.AddScoped<IChatService, ChatService>();
        services.AddHttpClient<IRateLimitAwareHttpClient, RateLimitAwareHttpClient>();

        // Register learning dependencies (if available)
        services.AddLearningIntegration();

        return services;
    }

    /// <summary>
    /// Adds Claude Code integration services with configuration action
    /// </summary>
    /// <param name="services">The service collection</param>
    /// <param name="configureOptions">Configuration action</param>
    /// <returns>The service collection for chaining</returns>
    public static IServiceCollection AddClaudeCodeIntegration(
        this IServiceCollection services,
        Action<ClaudeCodeOptions> configureOptions)
    {
        services.Configure(configureOptions);
        
        // Register core services
        services.AddScoped<IClaudeCodeService, ClaudeCodeService>();
        services.AddScoped<IContextClaudeService, ContextClaudeService>();
        services.AddScoped<IChatService, ChatService>();
        services.AddHttpClient<IRateLimitAwareHttpClient, RateLimitAwareHttpClient>();

        // Register learning dependencies (if available)
        services.AddLearningIntegration();

        return services;
    }

    /// <summary>
    /// Maps Claude Code endpoints to the application
    /// </summary>
    /// <param name="app">The web application</param>
    /// <param name="pattern">Base route pattern (default: "api/claude-code")</param>
    /// <returns>The web application for chaining</returns>
    public static WebApplication MapClaudeCodeEndpoints(
        this WebApplication app, 
        string pattern = "api/claude-code")
    {
        app.MapControllers();
        return app;
    }

    /// <summary>
    /// Adds learning integration if the learning package is available
    /// </summary>
    /// <param name="services">The service collection</param>
    /// <returns>The service collection for chaining</returns>
    private static IServiceCollection AddLearningIntegration(this IServiceCollection services)
    {
        try
        {
            // Try to register learning services (will work if MarketAlly.AIPlugin.Learning is available)
            var learningAssembly = AppDomain.CurrentDomain.GetAssemblies()
                .FirstOrDefault(a => a.GetName().Name == "MarketAlly.AIPlugin.Learning");

            if (learningAssembly != null)
            {
                // Add learning services using reflection to avoid hard dependency
                var serviceType = learningAssembly.GetType("MarketAlly.AIPlugin.Learning.ServiceCollectionExtensions");
                var method = serviceType?.GetMethod("AddLearningServices");
                method?.Invoke(null, new object[] { services });
            }
        }
        catch
        {
            // Learning package not available - continue without learning features
        }

        return services;
    }
}

/// <summary>
/// Configuration options for Claude Code integration
/// </summary>
public class ClaudeCodeOptions
{
    /// <summary>
    /// Base URL for the Aizia instance
    /// </summary>
    public string BaseUrl { get; set; } = "https://localhost:44314";

    /// <summary>
    /// API key for authentication
    /// </summary>
    public string? ApiKey { get; set; }

    /// <summary>
    /// Tenant ID for multi-tenant scenarios
    /// </summary>
    public string? TenantId { get; set; }

    /// <summary>
    /// Maximum number of retries for failed requests
    /// </summary>
    public int MaxRetries { get; set; } = 3;

    /// <summary>
    /// Base delay between retries
    /// </summary>
    public TimeSpan BaseRetryDelay { get; set; } = TimeSpan.FromSeconds(1);

    /// <summary>
    /// Maximum delay between retries
    /// </summary>
    public TimeSpan MaxRetryDelay { get; set; } = TimeSpan.FromMinutes(5);

    /// <summary>
    /// Backoff multiplier for exponential backoff
    /// </summary>
    public double BackoffMultiplier { get; set; } = 2.0;

    /// <summary>
    /// Enable detailed logging
    /// </summary>
    public bool EnableDetailedLogging { get; set; } = false;

    /// <summary>
    /// Enable rate limiting features
    /// </summary>
    public bool EnableRateLimiting { get; set; } = true;

    /// <summary>
    /// Enable learning features
    /// </summary>
    public bool EnableLearning { get; set; } = true;
}

/// <summary>
/// Rate limiting configuration options
/// </summary>
public class RateLimitOptions
{
    /// <summary>
    /// Enable automatic retry when rate limited
    /// </summary>
    public bool AutoRetry { get; set; } = true;

    /// <summary>
    /// Maximum time to wait for rate limit reset
    /// </summary>
    public TimeSpan MaxRetryWait { get; set; } = TimeSpan.FromMinutes(5);

    /// <summary>
    /// Show warnings when remaining requests fall below this threshold
    /// </summary>
    public int ShowWarningsAt { get; set; } = 10;

    /// <summary>
    /// Enable progress indicators during waits
    /// </summary>
    public bool EnableProgressIndicator { get; set; } = true;

    /// <summary>
    /// Respect rate limits and implement automatic handling
    /// </summary>
    public bool RespectRateLimits { get; set; } = true;
}

/// <summary>
/// Learning configuration options
/// </summary>
public class LearningOptions
{
    /// <summary>
    /// Enable advanced learning features
    /// </summary>
    public bool EnableAdvancedLearning { get; set; } = true;

    /// <summary>
    /// Learning mode (conservative, moderate, aggressive)
    /// </summary>
    public string LearningMode { get; set; } = "moderate";

    /// <summary>
    /// Maximum number of historical insights to consider
    /// </summary>
    public int MaxHistoricalInsights { get; set; } = 50;

    /// <summary>
    /// Confidence threshold for recommendations
    /// </summary>
    public double ConfidenceThreshold { get; set; } = 0.7;

    /// <summary>
    /// Enable predictive analytics
    /// </summary>
    public bool EnablePredictiveAnalytics { get; set; } = true;

    /// <summary>
    /// Session timeout in minutes
    /// </summary>
    public int SessionTimeoutMinutes { get; set; } = 60;
}