# test_properties_queue_advancement.py
"""
Property-based tests for message queue advancement.

Tests that the message queue advances correctly after verification.
"""

import pytest
from hypothesis import given, strategies as st, settings, HealthCheck
from datetime import datetime
from src.core.verification_models import (
    VerificationRecord,
    VerificationSession,
    TestMessage,
)
from src.core.message_queue_manager import MessageQueueManager


def message_strategy():
    """Generate random test messages with unique IDs."""
    return st.builds(
        TestMessage,
        message_id=st.uuids().map(str),
        text=st.text(min_size=1, max_size=500),
        pre_classified_label=st.sampled_from(["green", "yellow", "red"]),
    )


class TestQueueAdvancement:
    """
    **Feature: verification-mode, Property 2: Queue Advances After Verification**
    
    Tests that the message queue advances correctly after verification.
    """

    @given(st.lists(message_strategy(), min_size=1, max_size=20))
    @settings(suppress_health_check=[HealthCheck.function_scoped_fixture])
    def test_queue_advances_after_verification(self, messages):
        """
        **Feature: verification-mode, Property 2: Queue Advances After Verification**
        **Validates: Requirements 3.2, 3.5, 4.2**
        
        For any message queue, when a verifier submits feedback on a message,
        the next message in the queue should be displayed, and the verified
        message should no longer be in the active queue.
        """
        # Create a session and initialize queue
        session = VerificationSession(
            session_id="test_session",
            verifier_name="Test Verifier",
            dataset_id="test_dataset",
            dataset_name="Test Dataset",
        )
        
        queue_manager = MessageQueueManager(session)
        queue_manager.initialize_queue(messages)
        
        # Get initial state
        initial_message_id = queue_manager.get_current_message_id()
        initial_position = queue_manager.get_queue_position()
        
        # Verify initial state
        assert initial_message_id is not None
        assert initial_position == (1, len(messages))
        
        # Advance the queue
        advanced = queue_manager.advance_queue()
        
        # Verify advancement
        if len(messages) > 1:
            assert advanced is True
            next_message_id = queue_manager.get_current_message_id()
            next_position = queue_manager.get_queue_position()
            
            # Next message should be different from initial
            assert next_message_id != initial_message_id
            # Position should have incremented
            assert next_position[0] == initial_position[0] + 1
            # Verified message should be in verified list
            assert initial_message_id in session.verified_message_ids
        else:
            # Single message queue should be complete after advance
            assert advanced is False
            assert queue_manager.is_queue_complete()

    @given(st.lists(message_strategy(), min_size=2, max_size=20))
    def test_queue_advances_multiple_times(self, messages):
        """
        **Feature: verification-mode, Property 2: Queue Advances After Verification**
        **Validates: Requirements 3.2, 3.5, 4.2**
        
        For any message queue with multiple messages, advancing through all
        messages should result in queue completion.
        """
        session = VerificationSession(
            session_id="test_session",
            verifier_name="Test Verifier",
            dataset_id="test_dataset",
            dataset_name="Test Dataset",
        )
        
        queue_manager = MessageQueueManager(session)
        queue_manager.initialize_queue(messages)
        
        # Advance through all messages
        message_count = len(messages)
        for i in range(message_count):
            if i < message_count - 1:
                # Should be able to advance
                assert queue_manager.advance_queue() is True
            else:
                # Last advance should complete the queue
                assert queue_manager.advance_queue() is False
        
        # Queue should be complete
        assert queue_manager.is_queue_complete()
        # All messages should be verified
        assert len(session.verified_message_ids) == message_count

    @given(st.lists(message_strategy(), min_size=1, max_size=20))
    def test_verified_messages_not_in_active_queue(self, messages):
        """
        **Feature: verification-mode, Property 2: Queue Advances After Verification**
        **Validates: Requirements 3.2, 3.5, 4.2**
        
        For any message queue, verified messages should not be in the active
        queue position after advancement.
        """
        session = VerificationSession(
            session_id="test_session",
            verifier_name="Test Verifier",
            dataset_id="test_dataset",
            dataset_name="Test Dataset",
        )
        
        queue_manager = MessageQueueManager(session)
        queue_manager.initialize_queue(messages)
        
        verified_ids = []
        
        # Verify first message and advance
        if len(messages) > 0:
            first_msg_id = queue_manager.get_current_message_id()
            verified_ids.append(first_msg_id)
            queue_manager.advance_queue()
            
            # Current message should not be in verified list
            current_msg_id = queue_manager.get_current_message_id()
            if current_msg_id:
                assert current_msg_id not in verified_ids
            
            # Verified message should be in verified list
            assert first_msg_id in session.verified_message_ids

    @given(st.lists(message_strategy(), min_size=1, max_size=20))
    def test_queue_position_tracking(self, messages):
        """
        **Feature: verification-mode, Property 2: Queue Advances After Verification**
        **Validates: Requirements 3.2, 3.5, 4.2**
        
        For any message queue, the queue position should accurately track
        progress through the queue.
        """
        session = VerificationSession(
            session_id="test_session",
            verifier_name="Test Verifier",
            dataset_id="test_dataset",
            dataset_name="Test Dataset",
        )
        
        queue_manager = MessageQueueManager(session)
        queue_manager.initialize_queue(messages)
        
        # Check initial position
        pos, total = queue_manager.get_queue_position()
        assert pos == 1
        assert total == len(messages)
        
        # Advance and check position increments
        if len(messages) > 1:
            queue_manager.advance_queue()
            pos, total = queue_manager.get_queue_position()
            assert pos == 2
            assert total == len(messages)