# test/foundation/mabeam/coordination/auction_test.exs
defmodule Foundation.MABEAM.Coordination.AuctionTest do
  use ExUnit.Case, async: false
  
  alias Foundation.MABEAM.Coordination.Auction
  
  describe "sealed bid auction" do
    test "first price sealed bid auction" do
      bids = [
        {agent1: %{bid: 10.0, value: 0.8}},
        {agent2: %{bid: 15.0, value: 0.9}},
        {agent3: %{bid: 12.0, value: 0.7}}
      ]
      
      {:ok, result} = Auction.run_auction(:temperature_setting, bids,
        auction_type: :sealed_bid,
        payment_rule: :first_price
      )
      
      assert result.winner == :agent2
      assert result.winning_value == 0.9
      assert result.payment == 15.0
    end
    
    test "second price sealed bid auction" do
      bids = [
        {agent1: %{bid: 10.0, value: 0.8}},
        {agent2: %{bid: 15.0, value: 0.9}},
        {agent3: %{bid: 12.0, value: 0.7}}
      ]
      
      {:ok, result} = Auction.run_auction(:resource_allocation, bids,
        auction_type: :sealed_bid,
        payment_rule: :second_price
      )
      
      assert result.winner == :agent2
      assert result.payment == 12.0  # Second highest bid
    end
  end
  
  describe "english auction" do
    test "ascending price auction with multiple rounds" do
      agents = [:bidder1, :bidder2, :bidder3]
      
      {:ok, result} = Auction.run_auction(:cpu_allocation, agents,
        auction_type: :english,
        starting_price: 5.0,
        increment: 1.0,
        max_rounds: 10
      )
      
      assert result.auction_type == :english
      assert result.payment >= 5.0
      assert result.rounds <= 10
    end
  end
end

# lib/foundation/mabeam/coordination/auction.ex
defmodule Foundation.MABEAM.Coordination.Auction do
  @moduledoc """
  Auction-based coordination where agents bid for resources or parameter values.
  """
  
  alias Foundation.MABEAM.{AgentRegistry, Types}
  alias Foundation.{Events, Telemetry}
  
  @type bid :: {atom(), bid_details()}
  @type bid_details :: %{
    bid: float(),
    value: term(),
    max_bid: float(),
    reason: String.t()
  }
  
  @type auction_result :: %{
    winner: atom(),
    winning_value: term(),
    payment: float(),
    auction_type: auction_type(),
    participants: non_neg_integer(),
    efficiency: float(),
    rounds: non_neg_integer()
  }
  
  @type auction_type :: :sealed_bid | :english | :dutch | :combinatorial
  
  @spec run_auction(atom(), [bid()], keyword()) :: {:ok, auction_result()} | {:error, term()}
  def run_auction(variable_id, bids, opts \\ [])
  
  def run_auction(variable_id, bids, opts) do
    auction_type = Keyword.get(opts, :auction_type, :sealed_bid)
    
    start_time = System.monotonic_time()
    emit_auction_start_event(variable_id, auction_type, length(bids))
    
    result = case auction_type do
      :sealed_bid -> run_sealed_bid_auction(variable_id, bids, opts)
      :english -> run_english_auction(variable_id, bids, opts)
      :dutch -> run_dutch_auction(variable_id, bids, opts)
      :combinatorial -> run_combinatorial_auction(variable_id, bids, opts)
    end
    
    emit_auction_complete_event(variable_id, result, start_time)
    result
  end
  
  # Implementation of different auction types...
end

describe "market coordination" do
  test "finds market equilibrium" do
    suppliers = [
      {cpu_supplier: %{supply: 100, min_price: 1.0}},
      {memory_supplier: %{supply: 200, min_price: 0.5}}
    ]
    
    demanders = [
      {compute_agent: %{demand: 80, max_price: 2.0}},
      {storage_agent: %{demand: 150, max_price: 1.0}}
    ]
    
    {:ok, result} = Market.find_equilibrium(:resource_market, suppliers, demanders)
    
    assert result.equilibrium_found == true
    assert result.clearing_price > 0
    assert result.total_traded > 0
  end
end