# #region IntegrationTestConftest [C:3] [TYPE Module] [SEMANTICS test, conftest, testcontainers, postgres, integration]
# @BRIEF Shared pytest fixtures for integration tests using Testcontainers PostgreSQL.
# @RELATION BINDS_TO -> [TranslationJob]
# @RELATION BINDS_TO -> [TranslationRun]
# @RELATION BINDS_TO -> [TerminologyDictionary]
# @PRE Docker daemon is running and accessible.
# @POST PostgreSQL container is started, tables created, session available per test.
# @RATIONALE
#   Architecture:
#   - Testcontainers spins up a real PostgreSQL 16 container per session.
#   - Each test gets an isolated session with transaction rollback.
#   - FK constraints, JSON columns, indexes — all behave like production.
#
#   Why Testcontainers over SQLite:
#   - SQLite silently ignores FK violations in some edge cases.
#   - JSON column behavior differs (PostgreSQL JSONB vs SQLite JSON text).
#   - Index behavior, constraint names, and error messages differ.
#   - Production parity — catches bugs that SQLite tests miss.
#
# @REJECTED
#   Always-on PostgreSQL — requires manual setup, not portable.
#   Docker Compose for tests — slower startup, harder isolation.
#   Shared container across tests — state leakage between tests.
import os
import sys
from pathlib import Path

import pytest
from sqlalchemy import create_engine, event, text
from sqlalchemy.orm import Session, sessionmaker

sys.path.insert(0, str(Path(__file__).parent.parent.parent / "src"))

from src.core.database import Base

# Import all models to ensure tables are created
from src.models.translate import (  # noqa: F401
    DictionaryEntry,
    MetricSnapshot,
    TerminologyDictionary,
    TranslationBatch,
    TranslationEvent,
    TranslationJob,
    TranslationJobDictionary,
    TranslationLanguage,
    TranslationPreviewLanguage,
    TranslationPreviewRecord,
    TranslationPreviewSession,
    TranslationRecord,
    TranslationRun,
    TranslationRunLanguageStats,
    TranslationSchedule,
)
from src.models.llm import (  # noqa: F401
    LLMProvider,
    ValidationPolicy,
    ValidationRun,
    ValidationRecord,
    ValidationSource,
)
from src.models.maintenance import (  # noqa: F401
    MaintenanceEvent,
    MaintenanceDashboardBanner,
    MaintenanceDashboardState,
    MaintenanceSettings,
    MaintenanceEventStatus,
    MaintenanceDashboardBannerStatus,
    MaintenanceDashboardStateStatus,
    DashboardScope,
)
from src.models.task import (  # noqa: F401
    TaskRecord,
    TaskLogRecord,
)
from src.models.mapping import Environment  # noqa: F401


# #region postgres_container [C:2] [TYPE Fixture]
# @BRIEF Session-scoped Testcontainers PostgreSQL container.
@pytest.fixture(scope="session")
def postgres_container():
    """Start a PostgreSQL 16 container for the test session."""
    from testcontainers.postgres import PostgresContainer

    with PostgresContainer(
        image="postgres:16-alpine",
        username="test",
        password="test",
        dbname="test_translate",
    ) as pg:
        yield pg
# #endregion postgres_container


# #region pg_engine [C:2] [TYPE Fixture]
# @BRIEF SQLAlchemy engine connected to the Testcontainers PostgreSQL.
@pytest.fixture(scope="session")
def pg_engine(postgres_container):
    """Create engine and tables once per session."""
    url = postgres_container.get_connection_url()
    engine = create_engine(url, echo=False)

    # Create all tables
    Base.metadata.create_all(bind=engine)

    yield engine

    # Cleanup
    Base.metadata.drop_all(bind=engine)
    engine.dispose()
# #endregion pg_engine


# #region db_session [C:2] [TYPE Fixture]
# @BRIEF Per-test database session with transaction rollback for isolation.
@pytest.fixture
def db_session(pg_engine):
    """Provide a transactional database session that rolls back after each test.

    This ensures test isolation — each test starts with a clean database state.
    Uses connection-level transaction to wrap all operations.
    """
    connection = pg_engine.connect()
    transaction = connection.begin()

    session = sessionmaker(bind=connection)()

    # Join the outer transaction
    session.begin_nested()

    @event.listens_for(session, "after_transaction_end")
    def restart_savepoint(session, transaction):
        if transaction.nested and not transaction._parent.nested:
            session.begin_nested()

    try:
        yield session
    finally:
        session.close()
        transaction.rollback()
        connection.close()
# #endregion db_session


# #region mock_config_manager [C:2] [TYPE Fixture]
# @BRIEF Mock ConfigManager for integration tests.
@pytest.fixture
def mock_config_manager():
    """Provide a mock ConfigManager that returns test environment."""
    from unittest.mock import MagicMock
    from src.core.config_models import Environment

    config_manager = MagicMock()
    config_manager.get_environments.return_value = [
        Environment(
            id="test_env",
            name="Test Environment",
            url="http://superset:8088",
            username="admin",
            password="admin",
        )
    ]
    config_manager.get_environment.return_value = Environment(
        id="test_env",
        name="Test Environment",
        url="http://superset:8088",
        username="admin",
        password="admin",
    )
    config_manager.get_config.return_value = MagicMock()
    return config_manager
# #endregion mock_config_manager


# #region verify_postgres_features [C:2] [TYPE Function]
# @BRIEF Helper to verify PostgreSQL-specific features are working.
def verify_postgres_features(session: Session) -> dict:
    """Verify that PostgreSQL-specific features are available.

    Returns a dict with feature availability status.
    """
    features = {}

    # Check JSON support
    try:
        result = session.execute(text("SELECT '{}'::jsonb")).scalar()
        features["jsonb"] = result is not None
    except Exception:
        features["jsonb"] = False

    # Check FK constraints
    try:
        result = session.execute(text(
            "SELECT COUNT(*) FROM information_schema.table_constraints "
            "WHERE constraint_type = 'FOREIGN KEY'"
        )).scalar()
        features["foreign_keys"] = result > 0
    except Exception:
        features["foreign_keys"] = False

    # Check indexes
    try:
        result = session.execute(text(
            "SELECT COUNT(*) FROM pg_indexes WHERE schemaname = 'public'"
        )).scalar()
        features["indexes"] = result > 0
    except Exception:
        features["indexes"] = False

    return features
# #endregion verify_postgres_features

# #endregion IntegrationTestConftest