defmodule Foundation.Perimeter.External do
  @moduledoc """
  Zone 1: Maximum validation for untrusted external inputs
  """
  
  use Perimeter,
    validation: :strict,
    sanitization: :comprehensive,
    audit: :full
  
  # DSPEx program creation from external users
  defcontract dspex_program_create(params) do
    field :name, :string, required: true, length: 1..100
    field :description, :string, length: 0..1000
    field :schema_fields, {:list, :map}, 
      validate: &validate_schema_fields/1
    field :optimization_config, :map,
      validate: &Foundation.Variable.Space.validate_config/1
  end
  
  # Jido agent configuration from external sources
  defcontract jido_agent_config(params) do
    field :agent_type, :atom, values: [:task, :coordinator, :monitor]
    field :capabilities, {:list, :atom}
    field :initial_state, :map,
      validate: &validate_jido_state/1
    field :clustering_enabled, :boolean, default: false
  end
  
  # ML pipeline execution requests
  defcontract ml_pipeline_execute(params) do
    field :pipeline_id, :string, format: :uuid
    field :input_data, :any,  # Flexible input for ML
      validate: &validate_ml_input/1
    field :execution_options, :map,
      validate: &validate_execution_options/1
  end
end

defmodule Foundation.Perimeter.Internal do
  @moduledoc """
  Zone 2: Strategic validation at service boundaries
  """
  
  use Perimeter,
    validation: :strategic,
    performance: :optimized,
    contracts: :ai_specialized
  
  # Foundation MABEAM coordination contracts
  defcontract mabeam_coordinate_agents(params) do
    field :agent_group, {:list, :pid}, validate: &all_alive?/1
    field :coordination_pattern, :atom, 
      values: [:consensus, :pipeline, :map_reduce, :auction]
    field :timeout, :integer, range: 1000..300_000
    field :economic_params, :map, when: :auction,
      validate: &Foundation.Economic.validate_auction_params/1
  end
  
  # Jido agent lifecycle coordination
  defcontract jido_agent_lifecycle(params) do
    field :agent_spec, :map,
      validate: &validate_jido_agent_spec/1
    field :placement_strategy, :atom,
      values: [:load_balanced, :capability_matched, :leader_only]
    field :clustering_metadata, :map,
      validate: &Foundation.Clustering.validate_metadata/1
  end
  
  # Variable optimization coordination
  defcontract variable_optimization(params) do
    field :variable_space, ElixirML.Variable.Space,
      validate: &ElixirML.Variable.Space.valid?/1
    field :optimization_strategy, :atom,
      values: [:simba, :mipro, :genetic, :multi_agent]
    field :training_data, {:list, :map},
      validate: &validate_training_data/1
    field :performance_targets, :map,
      validate: &validate_performance_targets/1
  end
end

defmodule Foundation.Perimeter.Coupling do
  @moduledoc """
  Zone 3: Productive coupling with minimal validation overhead
  """
  
  use Perimeter,
    validation: :minimal,
    coupling: :productive,
    performance: :maximum
  
  # Direct Foundation service access (trusted)
  def foundation_service_call(service_module, function, args) do
    # No validation - trusted internal coupling
    apply(service_module, function, args)
  end
  
  # Jido agent direct coordination (trusted)
  def jido_agent_coordinate(agent_pid, coordination_spec) do
    # Productive coupling - direct GenServer calls
    GenServer.call(agent_pid, {:coordinate, coordination_spec})
  end
  
  # ElixirML variable extraction (trusted)
  def extract_variables_from_program(program_module) do
    # Direct module introspection - no validation needed
    program_module.__dspex_variables__()
    |> Enum.map(&build_elixir_ml_variable/1)
  end
  
  # DSPEx pipeline execution (trusted)
  def execute_dspex_pipeline(program_module, input, config) do
    # Direct execution - validation handled in Zone 1/2
    program_module.predict(Map.merge(input, config))
  end
end

defmodule Foundation.Perimeter.Core do
  @moduledoc """
  Zone 4: Core engine with minimal validation for maximum performance
  """
  
  use Perimeter,
    validation: :none,
    performance: :critical,
    optimization: :aggressive
  
  # High-frequency optimization loops
  def simba_optimization_step(population, evaluation_fn, mutation_rate) do
    # No validation - trusted hot path
    population
    |> mutate_population(mutation_rate)
    |> evaluate_fitness(evaluation_fn)
    |> select_survivors()
  end
  
  # Critical agent coordination
  def route_signal_fast(signal, target_pids) do
    # No validation - performance critical
    Enum.each(target_pids, &send(&1, signal))
  end
  
  # Variable space operations
  def sample_configuration_fast(variable_space) do
    # No validation - called in tight loops
    Enum.reduce(variable_space.variables, %{}, fn {name, var}, acc ->
      Map.put(acc, name, ElixirML.Variable.sample(var))
    end)
  end
end

# Zone 2: Strategic validation at Jido boundary
defmodule Foundation.Perimeter.JidoIntegration do
  defcontract jido_agent_state_update(params) do
    field :agent_id, :string, format: :uuid
    field :state_update, :any,  # Flexible - let Jido handle internal validation
      post_validate: &JidoFoundation.Bridge.validate_state_update/1
    field :clustering_sync, :boolean, default: false
  end
  
  # Zone 3: Productive coupling for validated data
  def update_jido_agent_state(agent_pid, validated_update) do
    # Direct call - validation already handled in Zone 2
    Jido.Agent.set(agent_pid, validated_update.state_update)
  end
end

# Zone 2: Clean service contracts
defmodule Foundation.Perimeter.ServiceContracts do
  defcontract register_clustered_agent(params) do
    field :agent_spec, :map, validate: &valid_jido_spec?/1
    field :placement_preferences, {:list, :atom}
    field :clustering_metadata, :map
  end
  
  # Zone 3: Direct service access for trusted callers
  def register_agent_direct(validated_spec, placement, metadata) do
    # No additional validation - use productive coupling
    Foundation.ClusterRegistry.register(
      validated_spec.agent_pid,
      validated_spec.agent_id,
      metadata
    )
  end
end

# Zone 1: Validate external optimization requests
defcontract optimization_request(params) do
  field :program_module, :atom, validate: &implements_dspex_program?/1
  field :training_data, {:list, :map}
  field :optimization_config, :map
end

# Zone 3: Direct variable operations
def extract_and_optimize(validated_request) do
  # Productive coupling - no validation overhead
  variables = validated_request.program_module.__dspex_variables__()
  variable_space = ElixirML.Variable.Space.from_variables(variables)
  
  # Zone 4: Core optimization loop
  ElixirML.Teleprompter.SIMBA.optimize(
    variable_space,
    build_evaluation_fn(validated_request),
    validated_request.optimization_config
  )
end

# Setup perimeter contracts for Foundation services
mix deps.add {:perimeter, "~> 1.0"}

# Define zone boundaries
lib/foundation/perimeter/
├── external.ex      # Zone 1 contracts
├── internal.ex      # Zone 2 service boundaries  
├── coupling.ex      # Zone 3 productive integration
└── core.ex         # Zone 4 performance critical

# Apply perimeter patterns to Jido bridge
lib/jido_foundation/perimeter/
├── agent_contracts.ex    # Zone 2 agent lifecycle
├── signal_routing.ex     # Zone 3 signal coordination
└── state_management.ex   # Zone 4 high-frequency updates

# Integrate perimeter with DSPEx execution
lib/dspex/perimeter/
├── program_validation.ex  # Zone 1 external programs
├── execution_contracts.ex # Zone 2 pipeline execution
└── optimization_core.ex   # Zone 4 SIMBA integration

defcontract economic_agent_auction(params) do
  field :resource_spec, :map, validate: &valid_resource_spec?/1
  field :bidder_agents, {:list, :pid}, validate: &all_alive?/1
  field :auction_type, :atom, values: [:first_price, :second_price, :dutch]
  field :economic_model, :map,
    validate: &Foundation.Economic.validate_model/1
    
  # AI-specific validations
  validate :ensure_agent_capabilities do
    # Ensure bidder agents have required economic capabilities
    Enum.all?(bidder_agents, &has_economic_capability?/1)
  end
  
  validate :resource_availability do
    # Verify resource can be allocated
    Foundation.ResourceManager.can_allocate?(resource_spec)
  end
end

defcontract variable_optimization_pipeline(params) do
  field :program_modules, {:list, :atom}
  field :optimization_strategy, ElixirML.OptimizationStrategy
  field :training_datasets, {:list, :map}
  field :performance_targets, :map
  
  # Multi-agent coordination
  field :agent_coordination, :map do
    field :coordinator_agent, :pid
    field :evaluator_agents, {:list, :pid}
    field :coordination_pattern, :atom, values: [:distributed, :hierarchical]
  end
  
  # Advanced ML validations
  validate :compatible_variable_spaces do
    # Ensure all programs have compatible variable spaces
    variable_spaces = Enum.map(program_modules, &extract_variables/1)
    ElixirML.Variable.Space.compatible?(variable_spaces)
  end
end