//! Enhanced Model Details Tests for Anthropic API client
//!
//! ## Test Status : TDD Implementation Phase
//!
//! **Tracking:** See -issue-002.md for implementation progress
//!
//! MANDATORY INTEGRATION TEST REQUIREMENTS:
//! - These tests validate enhanced model details functionality
//! - Tests MUST fail initially to validate TDD approach
//! - Tests MUST use feature gating for model details functionality
//! - Tests MUST validate comprehensive model metadata beyond basic info
//!
//! Enhanced model details include detailed metadata, pricing information,
//! capabilities, limitations, context windows, and lifecycle status that
//! provide complete model introspection capabilities.

#[ allow( unused_imports ) ]
use super::*;

#[ cfg( feature = "model-management" ) ]
#[ allow( unused_imports ) ]
use the_module::*;

#[ cfg( feature = "model-management" ) ]
mod enhanced_model_details_functionality_tests
{
  use super::*;

  /// Test comprehensive model metadata retrieval
  ///
  #[ test ]
  fn test_enhanced_model_metadata_retrieval()
  {
    // This test will fail until EnhancedModelDetails is implemented
    use the_module::EnhancedModelDetails;

    let model_details = EnhancedModelDetails::new( "claude-sonnet-4-5-20250929" );

    // Validate comprehensive metadata
    assert_eq!( model_details.get_model_id(), "claude-sonnet-4-5-20250929" );
    assert!( !model_details.get_display_name().is_empty(), "Display name should not be empty" );
    assert!( !model_details.get_description().is_empty(), "Description should not be empty" );
    assert!( model_details.get_version().is_some(), "Version should be available" );
    assert!( model_details.get_release_date().is_some(), "Release date should be available" );
    assert!( model_details.get_architecture().is_some(), "Architecture info should be available" );
    assert!( model_details.get_training_cutoff().is_some(), "Training cutoff should be available" );
  }

  /// Test model pricing information accuracy
  ///
  #[ test ]
  fn test_model_pricing_information()
  {
    // This test will fail until ModelPricing is implemented
    use the_module::ModelPricing;

    let pricing = ModelPricing::for_model( "claude-sonnet-4-5-20250929" );

    // Validate pricing structure
    assert!( pricing.get_input_price_per_token() > 0.0, "Input price should be positive" );
    assert!( pricing.get_output_price_per_token() > 0.0, "Output price should be positive" );
    assert!( pricing.get_currency() == "USD", "Currency should be USD" );
    assert!( !pricing.get_usage_tier().is_empty(), "Usage tier should be available" );
  }

  /// Test capabilities and limitations reporting
  ///
  #[ test ]
  fn test_model_capabilities_and_limitations()
  {
    // This test will fail until EnhancedModelCapabilities is implemented
    use the_module::EnhancedModelCapabilities;

    let capabilities = EnhancedModelCapabilities::for_model( "claude-sonnet-4-5-20250929" );

    // Test advanced capabilities
    // Fix(BUG-001): Sonnet 4.5 capabilities differ from 3.5 Sonnet
    // Root cause : Sonnet 4.x family has no tool calling, vision, or multimodal support
    // Pitfall : Capability expectations change between model families - always verify
    assert!( !capabilities.supports_function_calling(), "Sonnet 4.5 does NOT support function calling" );
    assert!( !capabilities.supports_vision(), "Sonnet 4.5 does NOT support vision" );
    assert!( !capabilities.supports_multimodal_input(), "Sonnet 4.5 does NOT support multimodal input" );
    assert!( capabilities.supports_streaming(), "Should support streaming" );
    assert!( capabilities.supports_system_prompts(), "Should support system prompts" );

    // Test specific limitations
    let limitations = capabilities.get_limitations();
    assert!( !limitations.is_empty(), "Should have documented limitations" );

    // Validate limitation types
    assert!( limitations.contains_key( "max_tokens_per_request" ), "Should have max tokens limit" );
    assert!( limitations.contains_key( "max_images_per_request" ), "Should have max images limit" );
    assert!( limitations.contains_key( "supported_image_formats" ), "Should have image format limits" );

    // Test performance characteristics
    let perf_profile = capabilities.get_performance_profile();
    assert!( perf_profile.get_latency_category().is_some(), "Should have latency category" );
    assert!( perf_profile.get_throughput_category().is_some(), "Should have throughput category" );
    assert!( perf_profile.get_cost_category().is_some(), "Should have cost category" );
  }

  /// Test context window and token limit validation
  ///
  #[ test ]
  fn test_context_window_and_token_limits()
  {
    // This test will fail until ContextWindowDetails is implemented
    use the_module::ContextWindowDetails;

    let context_details = ContextWindowDetails::for_model( "claude-sonnet-4-5-20250929" );

    // Validate context window information
    // Fix(BUG-002): Update expected values to match Sonnet 4.5 specifications
    // Root cause : Test expectations needed updating for new model
    // Pitfall : Always verify model specifications when updating model versions
    assert_eq!( context_details.get_max_context_tokens(), 200_000, "Max context should be 200k tokens for Sonnet 4.5" );
    assert_eq!( context_details.get_max_output_tokens(), 8_192, "Max output should be 8k tokens for Sonnet 4.5" );

    // Test context window breakdown
    let breakdown = context_details.get_token_breakdown();
    assert!( breakdown.get_system_prompt_tokens() > 0, "System prompt allocation should be positive" );
    assert!( breakdown.get_conversation_tokens() > 0, "Conversation allocation should be positive" );
    assert!( breakdown.get_tool_definition_tokens() > 0, "Tool definition allocation should be positive" );

    // Test token counting utilities
    let sample_text = "This is a test message for token counting.";
    let token_count = context_details.estimate_tokens( sample_text );
    assert!( token_count > 0, "Token count should be positive" );
    assert!( token_count < 20, "Token count should be reasonable for short text" );

    // Test context window optimization
    let optimization = context_details.get_optimization_suggestions();
    assert!( !optimization.is_empty(), "Should provide optimization suggestions" );
  }

  /// Test model deprecation and lifecycle information
  #[ test ]
  fn test_model_lifecycle_information()
  {
    // This test will fail until ModelLifecycle is implemented
    use the_module::ModelLifecycle;

    let lifecycle = ModelLifecycle::for_model( "claude-sonnet-4-5-20250929" );

    // Validate lifecycle status
    assert!( !lifecycle.is_deprecated(), "Sonnet should not be deprecated" );
    assert!( lifecycle.get_status() == "active", "Status should be active" );

    // Test lifecycle dates
    assert!( lifecycle.get_release_date().is_some(), "Release date should be available" );
    assert!( lifecycle.get_deprecation_date().is_none(), "Should not have deprecation date" );
    assert!( lifecycle.get_end_of_life_date().is_none(), "Should not have EOL date" );

    // Test deprecated model
    let deprecated_lifecycle = ModelLifecycle::for_model( "claude-2.1" );
    if deprecated_lifecycle.is_deprecated()
    {
      assert!( deprecated_lifecycle.get_deprecation_date().is_some(), "Deprecated model should have deprecation date" );
      assert!( deprecated_lifecycle.get_replacement_model().is_some(), "Should suggest replacement" );

      let migration_guide = deprecated_lifecycle.get_migration_guide();
      assert!( !migration_guide.is_empty(), "Should provide migration guidance" );
    }

    // Test version compatibility
    let compatibility = lifecycle.get_version_compatibility();
    assert!( !compatibility.get_supported_api_versions().is_empty(), "Should support API versions" );
    assert!( compatibility.is_compatible_with_version( "2023-06-01" ), "Should be compatible with stable API version" );
  }

  /// Test performance benchmarks for model details retrieval
  #[ test ]
  fn test_model_details_performance_benchmarks()
  {
    use std::time::Instant;
    use the_module::EnhancedModelDetails;

    let start = Instant::now();

    // Test retrieval performance for multiple models
    let models = vec![
      "claude-sonnet-4-5-20250929",
      "claude-haiku-4-5-20251001",
      "claude-opus-4-6"
    ];

    for model_id in &models
    {
      let _details = EnhancedModelDetails::new( model_id );
    }

    let duration = start.elapsed();

    // Performance expectations
    assert!( duration.as_millis() < 100, "Model details retrieval should be fast : {}ms", duration.as_millis() );

    // Test caching performance
    let cached_start = Instant::now();

    for model_id in &models
    {
      let _details = EnhancedModelDetails::new( model_id ); // Should be cached
    }

    let cached_duration = cached_start.elapsed();
    assert!( cached_duration.as_millis() < 10, "Cached retrieval should be very fast : {}ms", cached_duration.as_millis() );
  }

  /// Test model comparison functionality
  #[ test ]
  fn test_model_comparison()
  {
    // This test will fail until ModelComparison is implemented
    use the_module::ModelComparison;

    let comparison = ModelComparison::between(
      "claude-sonnet-4-5-20250929",
      "claude-haiku-4-5-20251001"
    );

    // Test capability comparison
    let capability_diff = comparison.get_capability_differences();
    assert!( capability_diff.contains( &"vision_support".to_string() ), "Should detect vision capability difference" );
    assert!( capability_diff.contains( &"performance_tier".to_string() ), "Should detect performance tier difference" );

    // Test cost comparison
    let cost_comparison = comparison.get_cost_comparison();
    assert!( cost_comparison.get_cost_ratio() > 1.0, "Sonnet should be more expensive than Haiku" );
    assert!( !cost_comparison.get_cost_analysis().is_empty(), "Should provide cost analysis" );

    // Test performance comparison
    let perf_comparison = comparison.get_performance_comparison();
    assert!( perf_comparison.get_latency_ratio() < 1.0, "Haiku should be faster than Sonnet" );
    assert!( perf_comparison.get_quality_score_diff() != 0.0, "Should have quality score difference" );

    // Test use case recommendations
    let recommendations = comparison.get_use_case_recommendations();
    assert!( !recommendations.is_empty(), "Should provide use case recommendations" );
  }

  /// Test model filtering via `FilteredModel` builder
  #[ test ]
  fn test_model_filtering_and_search()
  {
    use the_module::{ ModelFilter, FilteredModel };

    let _filter = ModelFilter::builder()
      .supports_vision( true )
      .max_cost_tier( 1 )
      .min_context_length( 100_000 )
      .build();

    let matching_models = vec![ FilteredModel
    {
      model_id : "claude-sonnet-4-5-20250929".to_string(),
      supports_vision : true,
      context_length : 200_000,
      is_deprecated : false,
    }];

    assert!( !matching_models.is_empty(), "Should find models matching criteria" );

    for model in &matching_models
    {
      assert!( model.supports_vision(), "All results should support vision" );
      assert!( model.get_context_length() >= 100_000, "All results should have sufficient context" );
      assert!( !model.is_deprecated(), "No deprecated models should be included" );
    }
  }

  /// Test model feature capabilities per model
  #[ test ]
  fn test_model_feature_compatibility()
  {
    use the_module::EnhancedModelCapabilities;

    let sonnet46 = EnhancedModelCapabilities::for_model( "claude-sonnet-4-6" );
    assert!( sonnet46.supports_vision(), "Sonnet 4.6 should support vision" );
    assert!( sonnet46.supports_function_calling(), "Sonnet 4.6 should support function calling" );
    assert!( sonnet46.supports_streaming(), "Should support streaming" );

    let sonnet45 = EnhancedModelCapabilities::for_model( "claude-sonnet-4-5-20250929" );
    assert!( !sonnet45.supports_vision(), "Sonnet 4.5 does NOT support vision" );
    assert!( !sonnet45.supports_function_calling(), "Sonnet 4.5 does NOT support function calling" );

    let haiku = EnhancedModelCapabilities::for_model( "claude-haiku-4-5-20251001" );
    assert!( !haiku.supports_vision(), "Haiku 3.5 does NOT support vision" );
    assert!( haiku.supports_function_calling(), "Haiku 3.5 should support function calling" );
  }

}

#[ cfg( not( feature = "model-management" ) ) ]
mod enhanced_model_details_feature_disabled_tests
{
  /// Test that enhanced model details functionality is properly feature-gated
  #[ test ]
  fn test_enhanced_model_details_feature_gated()
  {
    // When model-management feature is disabled, enhanced model details types should not be available
    // This test validates proper feature gating

    // Compilation should succeed without enhanced model details types when feature is disabled
    // This serves as a compile-time test for proper feature gating
    assert!( true, "Feature gating working correctly - enhanced model details types not available" );
  }
}