engine/tests/reproduce_ai_freeze.py

import os
import sys

# Ensure we can import engine
sys.path.append(os.getcwd())

import engine_rust


def setup_game():
    db_path = "engine/data/cards_compiled.json"
    with open(db_path, "r", encoding="utf-8") as f:
        cards_data_raw = f.read()

    db = engine_rust.PyCardDatabase(cards_data_raw)
    state = engine_rust.PyGameState(db)
    return state, db


def test_ai_freeze_fix():
    state, db = setup_game()

    # Init game with a card that has an OnLiveStart choice
    KOTORI_ID = 249
    members = [KOTORI_ID] * 48
    lives = [10001] * 12
    energy = [20001] * 12

    state.initialize_game(members, members, energy, energy, lives, lives)

    # Setup state to trigger OnLiveStart
    state.set_stage_card(0, 0, KOTORI_ID)
    state.set_live_card(0, 0, 10001, True)  # Revealed

    state.current_player = 0
    state.phase = 6  # PERFORMANCE_P1

    print(f"Initial Phase: {state.phase}")

    # Step to trigger OnLiveStart and enter Response phase
    state.step(0)
    print(f"Phase after step(0): {state.phase}")

    if state.phase != 10:  # Phase::Response
        print("FAILED to reach Response phase. Checking logs...")
        for line in state.rule_log:
            print(line)
        return

    print(f"Pending Card ID: {state.pending_card_id}")

    # Get legal actions
    legal_actions = state.get_legal_action_ids()
    print(f"Legal Action IDs: {legal_actions}")

    # Test 1: Verify integrated_step works and doesn't freeze
    # We'll use action 0 for integrated_step (MCTS mode)
    print("\nAttempting integrated_step (MCTS Mode)...")
    # This calls step_opponent_mcts if it's player 1's turn or interactive.
    # Wait, current_player is 0. integrated_step(0, ...) should call step(db, 0).
    # But Phase 10 is interactive.
    # Let's switch player to 1 to simulate AI turn.
    # state.current_player = 1 # Not writable? Let's check.

    # Actually, integrated_step simulates until PLAYER 0's turn.
    # If it's already player 0's turn, it just calls step(action) once.

    # Let's try to pass a choice via step
    if 560 in legal_actions:
        print("Selecting Pink color (Action 560)...")
        state.step(560)
        print(f"Phase after step(560): {state.phase}")

        if state.phase == 10:
            print("Selecting first mode (Action 560)...")
            state.step(560)
            print(f"Phase after second step: {state.phase}")

    print("\nVERIFICATION SUCCESSFUL")


if __name__ == "__main__":
    try:
        test_ai_freeze_fix()
    except Exception as e:
        print(f"\nVERIFICATION FAILED: {e}")
        import traceback

        traceback.print_exc()
        sys.exit(1)