defmodule MABEAM.Economics.AuctionManager do
  @moduledoc """
  Manages auction lifecycle with event-driven architecture.
  Estimated size: ~300 lines (down from ~1,200)
  """
  
  use GenServer
  alias MABEAM.Economics.{AuctionSpec, Bid, AuctionResult}
  
  # Public API - Focused on auction lifecycle only
  @spec create_auction(AuctionSpec.t()) :: {:ok, auction_id()} | {:error, term()}
  def create_auction(%AuctionSpec{} = spec) do
    GenServer.call(__MODULE__, {:create_auction, spec})
  end
  
  @spec place_bid(auction_id(), Bid.t()) :: :ok | {:error, term()}
  def place_bid(auction_id, %Bid{} = bid) do
    GenServer.cast(__MODULE__, {:place_bid, auction_id, bid})
  end
  
  @spec close_auction(auction_id()) :: {:ok, AuctionResult.t()} | {:error, term()}
  def close_auction(auction_id) do
    GenServer.call(__MODULE__, {:close_auction, auction_id})
  end
  
  # Event-driven integration with other services
  def handle_info({:market_data_updated, market_data}, state) do
    # Adjust auction parameters based on market conditions
    updated_auctions = adjust_auction_parameters(state.auctions, market_data)
    {:noreply, %{state | auctions: updated_auctions}}
  end
  
  # Private functions focused only on auction logic
  defp determine_winner(bids) when is_list(bids) do
    # Winner determination algorithm
  end
  
  defp validate_auction_spec(%AuctionSpec{} = spec) do
    # Auction specification validation
  end
end

defmodule MABEAM.Economics.MarketDataService do
  @moduledoc """
  Manages market state, price discovery, and market data aggregation.
  Estimated size: ~350 lines (down from ~1,000)
  """
  
  use GenServer
  alias MABEAM.Economics.{MarketState, PriceData, TradingVolume}
  
  # ETS-backed fast reads for market data
  @market_data_table :market_data_cache
  
  @spec get_current_market_state() :: MarketState.t()
  def get_current_market_state() do
    case :ets.lookup(@market_data_table, :current_state) do
      [{:current_state, state}] -> state
      [] -> MarketState.default()
    end
  end
  
  @spec update_price_data(PriceData.t()) :: :ok
  def update_price_data(%PriceData{} = price_data) do
    GenServer.cast(__MODULE__, {:update_price_data, price_data})
  end
  
  @spec get_trading_volume(time_range()) :: TradingVolume.t()
  def get_trading_volume(time_range) do
    case :ets.lookup(@market_data_table, {:trading_volume, time_range}) do
      [{_, volume}] -> volume
      [] -> TradingVolume.zero()
    end
  end
  
  # Asynchronous market data updates
  def handle_cast({:update_price_data, price_data}, state) do
    # Update market state
    new_state = MarketState.update_prices(state.market_state, price_data)
    
    # Update ETS cache for fast reads
    :ets.insert(@market_data_table, {:current_state, new_state})
    
    # Publish market update event
    Foundation.Events.publish("economics.market.price_updated", %{
      price_data: price_data,
      new_state: new_state,
      timestamp: DateTime.utc_now()
    })
    
    {:noreply, %{state | market_state: new_state}}
  end
end

defmodule MABEAM.Economics.PricingEngine do
  @moduledoc """
  Handles dynamic pricing, demand/supply analysis, and price predictions.
  Estimated size: ~250 lines (down from ~800)
  """
  
  # Async pricing calculations using Task delegation
  @spec calculate_dynamic_price(market_conditions()) :: {:ok, calculation_id()}
  def calculate_dynamic_price(market_conditions) do
    calculation_id = generate_calculation_id()
    
    Task.Supervisor.start_child(MABEAM.Economics.TaskSupervisor, fn ->
      price = perform_pricing_calculation(market_conditions)
      
      # Publish pricing result
      Foundation.Events.publish("economics.pricing.calculated", %{
        calculation_id: calculation_id,
        price: price,
        market_conditions: market_conditions,
        calculated_at: DateTime.utc_now()
      })
      
      # Cache result
      :ets.insert(:pricing_cache, {market_conditions_hash(market_conditions), price})
    end)
    
    {:ok, calculation_id}
  end
  
  @spec get_cached_price(market_conditions()) :: {:ok, price()} | {:error, :not_cached}
  def get_cached_price(market_conditions) do
    cache_key = market_conditions_hash(market_conditions)
    case :ets.lookup(:pricing_cache, cache_key) do
      [{^cache_key, price}] -> {:ok, price}
      [] -> {:error, :not_cached}
    end
  end
  
  # Demand/supply analysis functions
  defp analyze_demand_supply(market_conditions) do
    # Focused demand/supply analysis logic
  end
  
  defp perform_pricing_calculation(market_conditions) do
    # Core pricing algorithm implementation
  end
end

defmodule MABEAM.Economics.AgentBehaviorService do
  @moduledoc """
  Models economic behavior, resource allocation, and decision making for agents.
  Estimated size: ~280 lines (down from ~700)
  """
  
  alias MABEAM.Economics.{AgentProfile, ResourceAllocation, EconomicDecision}
  
  @spec analyze_agent_behavior(agent_id(), behavior_context()) :: 
    {:ok, EconomicDecision.t()} | {:error, term()}
  def analyze_agent_behavior(agent_id, context) do
    with {:ok, profile} <- get_agent_profile(agent_id),
         {:ok, allocation} <- calculate_resource_allocation(profile, context),
         {:ok, decision} <- make_economic_decision(profile, allocation, context) do
      {:ok, decision}
    end
  end
  
  @spec update_agent_performance(agent_id(), performance_metrics()) :: :ok
  def update_agent_performance(agent_id, metrics) do
    GenServer.cast(__MODULE__, {:update_performance, agent_id, metrics})
  end
  
  # Agent behavior modeling functions
  defp calculate_resource_allocation(profile, context) do
    # Resource allocation strategy based on agent profile
  end
  
  defp make_economic_decision(profile, allocation, context) do
    # Economic decision making algorithm
  end
end

defmodule MABEAM.Economics.TransactionProcessor do
  @moduledoc """
  Handles payment processing, validation, settlement, and fee calculations.
  Estimated size: ~200 lines (down from ~600)  
  """
  
  alias MABEAM.Economics.{Transaction, Payment, Settlement}
  
  @spec process_transaction(Transaction.t()) :: {:ok, transaction_id()} | {:error, term()}
  def process_transaction(%Transaction{} = transaction) do
    transaction_id = generate_transaction_id()
    
    # Asynchronous transaction processing
    Task.Supervisor.start_child(MABEAM.Economics.TaskSupervisor, fn ->
      case validate_and_process_transaction(transaction) do
        {:ok, result} ->
          Foundation.Events.publish("economics.transaction.completed", %{
            transaction_id: transaction_id,
            result: result,
            processed_at: DateTime.utc_now()
          })
        {:error, reason} ->
          Foundation.Events.publish("economics.transaction.failed", %{
            transaction_id: transaction_id,
            reason: reason,
            failed_at: DateTime.utc_now()
          })
      end
    end)
    
    {:ok, transaction_id}
  end
  
  defp validate_and_process_transaction(transaction) do
    with :ok <- validate_transaction(transaction),
         {:ok, payment_result} <- process_payment(transaction.payment),
         {:ok, settlement} <- create_settlement(transaction, payment_result) do
      {:ok, %{payment: payment_result, settlement: settlement}}
    end
  end
end

defmodule MABEAM.Economics.AnalyticsService do
  @moduledoc """
  Generates economic metrics, performance reports, and market analysis.
  Estimated size: ~180 lines (down from ~500)
  """
  
  alias MABEAM.Economics.{MetricsReport, PerformanceAnalysis, MarketAnalysis}
  
  @spec generate_metrics_report(time_period()) :: {:ok, MetricsReport.t()}
  def generate_metrics_report(time_period) do
    # Delegate report generation to background task
    Task.Supervisor.start_child(MABEAM.Economics.TaskSupervisor, fn ->
      report = compile_metrics_report(time_period)
      
      # Cache report for fast access
      :ets.insert(:analytics_cache, {{:metrics_report, time_period}, report})
      
      # Publish report availability
      Foundation.Events.publish("economics.analytics.report_ready", %{
        report_type: :metrics,
        time_period: time_period,
        generated_at: DateTime.utc_now()
      })
    end)
    
    {:ok, :report_generation_started}
  end
  
  @spec get_cached_report(report_type(), time_period()) :: 
    {:ok, report()} | {:error, :not_available}
  def get_cached_report(report_type, time_period) do
    case :ets.lookup(:analytics_cache, {report_type, time_period}) do
      [{_, report}] -> {:ok, report}
      [] -> {:error, :not_available}
    end
  end
end

defmodule MABEAM.Economics.RulesEngine do
  @moduledoc """
  Manages economic rules, market configuration, and policy enforcement.
  Estimated size: ~160 lines (down from ~400)
  """
  
  alias MABEAM.Economics.{Rule, Policy, Compliance}
  
  @spec validate_economic_action(action_type(), action_params()) :: 
    :ok | {:error, compliance_violation()}
  def validate_economic_action(action_type, action_params) do
    applicable_rules = get_applicable_rules(action_type)
    
    case apply_rules(applicable_rules, action_params) do
      [] -> :ok
      violations -> {:error, {:compliance_violations, violations}}
    end
  end
  
  @spec update_economic_policy(Policy.t()) :: :ok | {:error, term()}
  def update_economic_policy(%Policy{} = policy) do
    GenServer.call(__MODULE__, {:update_policy, policy})
  end
  
  defp get_applicable_rules(action_type) do
    # Fast rule lookup from ETS
    case :ets.lookup(:economic_rules, action_type) do
      [{^action_type, rules}] -> rules
      [] -> []
    end
  end
end

defmodule MABEAM.Economics.IntegrationHub do
  @moduledoc """
  Handles external system integration, event routing, and API coordination.
  Estimated size: ~140 lines (down from ~357)
  """
  
  @spec sync_with_external_market(market_id()) :: :ok | {:error, term()}
  def sync_with_external_market(market_id) do
    GenServer.cast(__MODULE__, {:sync_external_market, market_id})
  end
  
  @spec handle_external_event(external_event()) :: :ok
  def handle_external_event(external_event) do
    # Route external events to appropriate internal services
    case determine_event_destination(external_event) do
      :auction_manager -> 
        Foundation.Events.publish("economics.auction.external_event", external_event)
      :market_data ->
        Foundation.Events.publish("economics.market.external_update", external_event)
      :pricing_engine ->
        Foundation.Events.publish("economics.pricing.external_signal", external_event)
      _ ->
        Logger.warn("Unhandled external event", event: external_event)
    end
  end
end

defmodule MABEAM.Coordination.AgentCoordinator do
  @moduledoc """
  Manages agent coordination, lifecycle, and state synchronization.
  Estimated size: ~350 lines (down from ~1,100)
  """
  
  alias MABEAM.Coordination.{AgentGroup, CoordinationPlan, AgentState}
  
  @spec coordinate_agent_group(AgentGroup.t()) :: {:ok, coordination_id()} | {:error, term()}
  def coordinate_agent_group(%AgentGroup{} = group) do
    coordination_id = generate_coordination_id()
    
    # Event-driven coordination initiation
    Foundation.Events.publish("coordination.agent_group.initiated", %{
      coordination_id: coordination_id,
      group: group,
      initiated_at: DateTime.utc_now()
    })
    
    {:ok, coordination_id}
  end
  
  @spec update_agent_coordination_state(agent_id(), AgentState.t()) :: :ok
  def update_agent_coordination_state(agent_id, %AgentState{} = state) do
    # Fast ETS update for coordination state
    :ets.insert(:agent_coordination_states, {agent_id, state})
    
    # Event notification for state change
    Foundation.Events.publish("coordination.agent.state_updated", %{
      agent_id: agent_id,
      new_state: state,
      updated_at: DateTime.utc_now()
    })
    
    :ok
  end
  
  @spec get_coordination_status(coordination_id()) :: 
    {:ok, coordination_status()} | {:error, :not_found}
  def get_coordination_status(coordination_id) do
    # Fast ETS lookup
    case :ets.lookup(:coordination_status, coordination_id) do
      [{^coordination_id, status}] -> {:ok, status}
      [] -> {:error, :not_found}
    end
  end
end

defmodule MABEAM.Coordination.TaskDistributor do
  @moduledoc """
  Handles work assignment, load balancing, and task scheduling.
  Estimated size: ~300 lines (down from ~900)
  """
  
  alias MABEAM.Coordination.{Task, WorkAssignment, LoadBalancer}
  
  @spec distribute_task(Task.t()) :: {:ok, distribution_id()} | {:error, term()}
  def distribute_task(%Task{} = task) do
    distribution_id = generate_distribution_id()
    
    # Async task distribution using background process
    Task.Supervisor.start_child(MABEAM.Coordination.TaskSupervisor, fn ->
      case find_optimal_agent_assignment(task) do
        {:ok, assignment} ->
          execute_task_assignment(assignment)
          record_distribution_success(distribution_id, assignment)
        {:error, reason} ->
          record_distribution_failure(distribution_id, reason)
      end
    end)
    
    {:ok, distribution_id}
  end
  
  @spec get_agent_load(agent_id()) :: {:ok, load_metrics()} | {:error, :not_found}
  def get_agent_load(agent_id) do
    case :ets.lookup(:agent_loads, agent_id) do
      [{^agent_id, load_metrics}] -> {:ok, load_metrics}
      [] -> {:error, :not_found}
    end
  end
  
  defp find_optimal_agent_assignment(task) do
    # Load balancing algorithm implementation
  end
end

defmodule MABEAM.Coordination.ConsensusProtocol do
  @moduledoc """
  Implements distributed consensus, voting, and agreement algorithms.
  Estimated size: ~280 lines (down from ~800)
  """
  
  alias MABEAM.Coordination.{Proposal, Vote, ConsensusResult}
  
  @spec initiate_consensus(Proposal.t()) :: {:ok, consensus_id()} | {:error, term()}
  def initiate_consensus(%Proposal{} = proposal) do
    consensus_id = generate_consensus_id()
    
    # Initialize consensus state in ETS
    consensus_state = %{
      proposal: proposal,
      votes: %{},
      status: :voting,
      initiated_at: DateTime.utc_now()
    }
    
    :ets.insert(:consensus_states, {consensus_id, consensus_state})
    
    # Publish consensus initiation event
    Foundation.Events.publish("coordination.consensus.initiated", %{
      consensus_id: consensus_id,
      proposal: proposal
    })
    
    {:ok, consensus_id}
  end
  
  @spec cast_vote(consensus_id(), agent_id(), Vote.t()) :: :ok | {:error, term()}
  def cast_vote(consensus_id, agent_id, %Vote{} = vote) do
    case :ets.lookup(:consensus_states, consensus_id) do
      [{^consensus_id, consensus_state}] ->
        updated_state = record_vote(consensus_state, agent_id, vote)
        :ets.insert(:consensus_states, {consensus_id, updated_state})
        
        # Check if consensus reached
        check_consensus_completion(consensus_id, updated_state)
        :ok
      [] ->
        {:error, :consensus_not_found}
    end
  end
  
  defp check_consensus_completion(consensus_id, consensus_state) do
    if consensus_reached?(consensus_state) do
      result = calculate_consensus_result(consensus_state)
      
      Foundation.Events.publish("coordination.consensus.completed", %{
        consensus_id: consensus_id,
        result: result,
        completed_at: DateTime.utc_now()
      })
    end
  end
end

defmodule MABEAM.Coordination.CommunicationManager do
  @moduledoc """
  Manages message routing, protocol handling, and communication channels.
  Estimated size: ~250 lines (down from ~700)
  """
  
  alias MABEAM.Coordination.{Message, Channel, RoutingRule}
  
  @spec send_coordination_message(Message.t()) :: :ok | {:error, term()}
  def send_coordination_message(%Message{} = message) do
    case determine_routing(message) do
      {:ok, routing} ->
        execute_message_routing(message, routing)
      {:error, reason} ->
        Logger.error("Message routing failed", message: message, reason: reason)
        {:error, reason}
    end
  end
  
  @spec create_communication_channel(channel_spec()) :: 
    {:ok, channel_id()} | {:error, term()}
  def create_communication_channel(channel_spec) do
    channel_id = generate_channel_id()
    
    # Create channel in ETS for fast access
    channel = Channel.create(channel_id, channel_spec)
    :ets.insert(:communication_channels, {channel_id, channel})
    
    # Publish channel creation event
    Foundation.Events.publish("coordination.channel.created", %{
      channel_id: channel_id,
      spec: channel_spec,
      created_at: DateTime.utc_now()
    })
    
    {:ok, channel_id}
  end
  
  defp determine_routing(message) do
    # Message routing logic based on content and destination
  end
  
  defp execute_message_routing(message, routing) do
    # Execute message delivery based on routing rules
  end
end

defmodule MABEAM.Coordination.SynchronizationPrimitives do
  @moduledoc """
  Implements barriers, locks, semaphores, and coordination points.
  Estimated size: ~220 lines (down from ~600)
  """
  
  alias MABEAM.Coordination.{Barrier, Lock, Semaphore}
  
  @spec create_coordination_barrier(barrier_spec()) :: {:ok, barrier_id()}
  def create_coordination_barrier(barrier_spec) do
    barrier_id = generate_barrier_id()
    
    barrier_state = %{
      spec: barrier_spec,
      participants: %{},
      status: :waiting,
      created_at: DateTime.utc_now()
    }
    
    :ets.insert(:coordination_barriers, {barrier_id, barrier_state})
    {:ok, barrier_id}
  end
  
  @spec wait_at_barrier(barrier_id(), participant_id()) :: :ok | {:error, term()}
  def wait_at_barrier(barrier_id, participant_id) do
    case :ets.lookup(:coordination_barriers, barrier_id) do
      [{^barrier_id, barrier_state}] ->
        updated_state = add_participant_to_barrier(barrier_state, participant_id)
        :ets.insert(:coordination_barriers, {barrier_id, updated_state})
        
        if barrier_complete?(updated_state) do
          notify_barrier_completion(barrier_id)
          :ok
        else
          wait_for_barrier_completion(barrier_id)
        end
      [] ->
        {:error, :barrier_not_found}
    end
  end
  
  defp wait_for_barrier_completion(barrier_id) do
    receive do
      {:barrier_complete, ^barrier_id} -> :ok
    after
      30_000 -> {:error, :barrier_timeout}
    end
  end
end

defmodule MABEAM.Coordination.FaultToleranceManager do
  @moduledoc """
  Handles failure detection, recovery, and redundancy management.
  Estimated size: ~200 lines (down from ~500)
  """
  
  alias MABEAM.Coordination.{FailureDetector, RecoveryPlan, RedundancyManager}
  
  @spec monitor_coordination_health() :: :ok
  def monitor_coordination_health() do
    GenServer.cast(__MODULE__, :perform_health_check)
  end
  
  @spec handle_coordination_failure(failure_event()) :: {:ok, recovery_plan()}
  def handle_coordination_failure(failure_event) do
    # Async failure handling
    Task.Supervisor.start_child(MABEAM.Coordination.TaskSupervisor, fn ->
      recovery_plan = create_recovery_plan(failure_event)
      execute_recovery_plan(recovery_plan)
      
      Foundation.Events.publish("coordination.fault_tolerance.recovery_completed", %{
        failure_event: failure_event,
        recovery_plan: recovery_plan,
        recovered_at: DateTime.utc_now()
      })
    end)
    
    {:ok, :recovery_initiated}
  end
  
  def handle_cast(:perform_health_check, state) do
    # Perform health checks on coordination components
    health_status = check_coordination_component_health()
    
    case detect_failures(health_status) do
      [] -> :ok
      failures -> 
        Enum.each(failures, &handle_coordination_failure/1)
    end
    
    {:noreply, state}
  end
  
  defp create_recovery_plan(failure_event) do
    # Create recovery plan based on failure type and context
  end
end

defmodule MABEAM.Coordination.PerformanceMonitor do
  @moduledoc """
  Collects metrics, analyzes performance, and provides optimization recommendations.
  Estimated size: ~190 lines (down from ~713)
  """
  
  alias MABEAM.Coordination.{PerformanceMetrics, OptimizationReport}
  
  @spec collect_coordination_metrics() :: :ok
  def collect_coordination_metrics() do
    GenServer.cast(__MODULE__, :collect_metrics)
  end
  
  @spec get_performance_report(time_period()) :: 
    {:ok, PerformanceMetrics.t()} | {:error, :not_available}
  def get_performance_report(time_period) do
    case :ets.lookup(:performance_reports, time_period) do
      [{^time_period, report}] -> {:ok, report}
      [] -> {:error, :not_available}
    end
  end
  
  def handle_cast(:collect_metrics, state) do
    # Collect performance metrics from all coordination services
    metrics = gather_coordination_metrics()
    
    # Update ETS cache
    current_period = get_current_time_period()
    :ets.insert(:performance_reports, {current_period, metrics})
    
    # Check for performance issues
    case analyze_performance_issues(metrics) do
      [] -> :ok
      issues ->
        Foundation.Events.publish("coordination.performance.issues_detected", %{
          issues: issues,
          metrics: metrics,
          detected_at: DateTime.utc_now()
        })
    end
    
    {:noreply, state}
  end
  
  defp gather_coordination_metrics() do
    # Collect metrics from all coordination services
  end
end

defmodule MABEAM.Migration.ServiceExtractor do
  @moduledoc """
  Utilities for extracting services from monolithic modules.
  """
  
  @spec extract_service_from_module(
    source_module :: atom(), 
    target_service :: atom(), 
    functions :: [atom()]
  ) :: {:ok, extraction_result()} | {:error, term()}
  def extract_service_from_module(source_module, target_service, functions) do
    with :ok <- validate_extraction_feasibility(source_module, functions),
         {:ok, extracted_code} <- extract_functions(source_module, functions),
         {:ok, service_module} <- create_service_module(target_service, extracted_code),
         :ok <- setup_service_supervision(target_service),
         :ok <- update_client_references(source_module, target_service, functions) do
      {:ok, %{
        extracted_functions: functions,
        service_module: service_module,
        clients_updated: true
      }}
    end
  end
  
  # Service supervision setup
  defp setup_service_supervision(service_module) do
    # Add service to appropriate supervision tree
    case service_module do
      module when module in [
        MABEAM.Economics.AuctionManager,
        MABEAM.Economics.MarketDataService,
        MABEAM.Economics.PricingEngine
      ] ->
        add_to_economics_supervisor(module)
      module when module in [
        MABEAM.Coordination.AgentCoordinator,
        MABEAM.Coordination.TaskDistributor,
        MABEAM.Coordination.ConsensusProtocol
      ] ->
        add_to_coordination_supervisor(module)
    end
  end
end

defmodule MABEAM.Migration.InterfaceEstablisher do
  @moduledoc """
  Establishes clean interfaces between decomposed services.
  """
  
  @spec establish_service_interfaces(services :: [atom()]) :: :ok | {:error, term()}
  def establish_service_interfaces(services) do
    Enum.each(services, fn service ->
      create_service_interface(service)
      setup_event_subscriptions(service)
      configure_service_dependencies(service)
    end)
  end
  
  defp create_service_interface(service) do
    # Create standardized service interface
    interface_module = Module.concat([service, "Interface"])
    
    # Generate interface based on service public functions
    public_functions = get_public_functions(service)
    create_interface_module(interface_module, public_functions)
  end
  
  defp setup_event_subscriptions(service) do
    # Setup appropriate event subscriptions for each service
    subscriptions = determine_event_subscriptions(service)
    
    Enum.each(subscriptions, fn {event_pattern, handler} ->
      Foundation.Events.subscribe(service, event_pattern, handler)
    end)
  end
end

defmodule MABEAM.Migration.DataMigrator do
  @moduledoc """
  Migrates data from monolithic GenServer state to distributed service states.
  """
  
  @spec migrate_economics_data() :: {:ok, migration_result()} | {:error, term()}
  def migrate_economics_data() do
    # Extract current economics state
    {:ok, current_state} = get_current_economics_state()
    
    # Distribute data to appropriate services
    migration_tasks = [
      migrate_auction_data(current_state.auctions),
      migrate_market_data(current_state.market_data),
      migrate_pricing_data(current_state.pricing_data),
      migrate_agent_behavior_data(current_state.agent_data),
      migrate_transaction_data(current_state.transactions),
      migrate_analytics_data(current_state.analytics)
    ]
    
    # Execute migrations concurrently
    results = Task.await_many(migration_tasks, 30_000)
    
    # Verify migration success
    case verify_data_migration() do
      :ok -> {:ok, %{migrated_services: 6, verification: :passed}}
      {:error, reason} -> {:error, {:migration_verification_failed, reason}}
    end
  end
  
  defp migrate_auction_data(auction_data) do
    Task.async(fn ->
      Enum.each(auction_data, fn {auction_id, auction_state} ->
        MABEAM.Economics.AuctionManager.restore_auction_state(auction_id, auction_state)
      end)
    end)
  end
  
  defp verify_data_migration() do
    # Comprehensive verification that all data was migrated correctly
    verification_checks = [
      verify_auction_data_integrity(),
      verify_market_data_integrity(),
      verify_pricing_data_integrity(),
      verify_analytics_data_integrity()
    ]
    
    case Enum.all?(verification_checks, & &1 == :ok) do
      true -> :ok
      false -> {:error, :data_integrity_check_failed}
    end
  end
end

defmodule MABEAM.Migration.RollbackManager do
  @moduledoc """
  Comprehensive rollback strategy for module decomposition.
  """
  
  @spec rollback_decomposition(module :: atom()) :: 
    {:ok, rollback_result()} | {:error, term()}
  def rollback_decomposition(module) do
    case module do
      MABEAM.Economics ->
        rollback_economics_decomposition()
      MABEAM.Coordination ->
        rollback_coordination_decomposition()
      _ ->
        {:error, :unknown_module}
    end
  end
  
  defp rollback_economics_decomposition() do
    rollback_steps = [
      :stop_decomposed_services,
      :restore_original_economics_module,
      :migrate_data_back_to_monolith,
      :update_client_references,
      :verify_rollback_success
    ]
    
    execute_rollback_steps(rollback_steps, :economics)
  end
  
  defp execute_rollback_steps(steps, module) do
    Enum.reduce_while(steps, {:ok, []}, fn step, {:ok, completed_steps} ->
      case execute_rollback_step(step, module) do
        :ok -> 
          {:cont, {:ok, [step | completed_steps]}}
        {:error, reason} -> 
          {:halt, {:error, {step, reason, completed_steps}}}
      end
    end)
  end
  
  defp execute_rollback_step(:stop_decomposed_services, :economics) do
    services = [
      MABEAM.Economics.AuctionManager,
      MABEAM.Economics.MarketDataService,
      MABEAM.Economics.PricingEngine,
      MABEAM.Economics.AgentBehaviorService,
      MABEAM.Economics.TransactionProcessor,
      MABEAM.Economics.AnalyticsService
    ]
    
    Enum.each(services, fn service ->
      GenServer.stop(service, :normal, 5_000)
    end)
    
    :ok
  end
end

defmodule MABEAM.Test.ServiceIntegration do
  @moduledoc """
  Integration testing framework for decomposed services.
  """
  
  use ExUnit.Case
  
  describe "Economics service integration" do
    test "auction creation triggers market data update" do
      # Setup
      auction_spec = build_auction_spec()
      
      # Subscribe to market data events
      Foundation.Events.subscribe(self(), "economics.market.auction_created")
      
      # Create auction
      {:ok, auction_id} = MABEAM.Economics.AuctionManager.create_auction(auction_spec)
      
      # Verify market data service receives event
      assert_receive {:event, "economics.market.auction_created", %{auction_id: ^auction_id}}, 1_000
      
      # Verify market state was updated
      market_state = MABEAM.Economics.MarketDataService.get_current_market_state()
      assert market_state.active_auctions[auction_id] != nil
    end
    
    test "pricing calculation triggers analytics update" do
      market_conditions = build_market_conditions()
      
      # Subscribe to analytics events
      Foundation.Events.subscribe(self(), "economics.analytics.pricing_updated")
      
      # Trigger pricing calculation
      {:ok, calculation_id} = 
        MABEAM.Economics.PricingEngine.calculate_dynamic_price(market_conditions)
      
      # Wait for calculation completion
      assert_receive {:event, "economics.pricing.calculated", %{calculation_id: ^calculation_id}}, 5_000
      
      # Verify analytics service was notified
      assert_receive {:event, "economics.analytics.pricing_updated", _}, 1_000
    end
  end
  
  describe "Coordination service integration" do
    test "agent coordination triggers task distribution" do
      agent_group = build_agent_group()
      
      # Subscribe to task distribution events
      Foundation.Events.subscribe(self(), "coordination.task.distribution_started")
      
      # Initiate coordination
      {:ok, coordination_id} = 
        MABEAM.Coordination.AgentCoordinator.coordinate_agent_group(agent_group)
      
      # Verify task distribution was triggered
      assert_receive {:event, "coordination.task.distribution_started", 
                     %{coordination_id: ^coordination_id}}, 2_000
    end
  end
end

defmodule MABEAM.Test.DecompositionPerformance do
  @moduledoc """
  Performance testing to validate decomposition benefits.
  """
  
  use ExUnit.Case
  
  test "decomposed economics services handle concurrent load" do
    concurrent_operations = 1000
    
    # Test concurrent auction operations
    auction_tasks = Enum.map(1..concurrent_operations, fn _i ->
      Task.async(fn ->
        auction_spec = build_auction_spec()
        start_time = System.monotonic_time(:microsecond)
        
        {:ok, _auction_id} = MABEAM.Economics.AuctionManager.create_auction(auction_spec)
        
        end_time = System.monotonic_time(:microsecond)
        end_time - start_time
      end)
    end)
    
    # Wait for all operations to complete
    durations = Task.await_many(auction_tasks, 30_000)
    
    # Validate performance characteristics
    avg_duration = Enum.sum(durations) / length(durations)
    max_duration = Enum.max(durations)
    
    # Performance should be better than monolithic version
    assert avg_duration < 50_000  # 50ms average
    assert max_duration < 200_000  # 200ms max
    assert length(durations) == concurrent_operations  # All operations succeeded
  end
  
  test "decomposed coordination services maintain low latency" do
    # Test coordination latency with decomposed services
    coordination_operations = 500
    
    latency_measurements = Enum.map(1..coordination_operations, fn _i ->
      agent_group = build_agent_group()
      start_time = System.monotonic_time(:microsecond)
      
      {:ok, _coordination_id} = 
        MABEAM.Coordination.AgentCoordinator.coordinate_agent_group(agent_group)
      
      end_time = System.monotonic_time(:microsecond)
      end_time - start_time
    end)
    
    # Validate latency characteristics
    avg_latency = Enum.sum(latency_measurements) / length(latency_measurements)
    p95_latency = percentile(latency_measurements, 95)
    
    assert avg_latency < 10_000  # 10ms average
    assert p95_latency < 50_000  # 50ms p95
  end
end