import uuid
from datetime import datetime, timezone
from unittest.mock import MagicMock, patch

import pytest
from sqlalchemy import (
    TEXT,
    Boolean,
    Column,
    DateTime,
    ForeignKey,
    Integer,
    String,
    TypeDecorator,
    UniqueConstraint,
    create_engine,
)
from sqlalchemy.orm import declarative_base, sessionmaker
from sqlalchemy.pool import StaticPool

# Create a mock-specific Base class for testing
MockBase = declarative_base()


class SQLiteUUID(TypeDecorator):
    """Enables UUID support for SQLite."""

    impl = TEXT
    cache_ok = True

    def process_bind_param(self, value, dialect):
        if value is None:
            return value
        return str(value)

    def process_result_value(self, value, dialect):
        if value is None:
            return value
        return uuid.UUID(value)


# Model classes for testing - prefix with Mock to avoid pytest collection
class MockPriority(MockBase):
    __tablename__ = "priorities"
    id = Column(Integer, primary_key=True)
    description = Column(String, nullable=False)


class MockChannelDB(MockBase):
    __tablename__ = "channels"
    id = Column(SQLiteUUID(), primary_key=True, default=uuid.uuid4)
    tvg_id = Column(String, nullable=False)
    name = Column(String, nullable=False)
    group_title = Column(String, nullable=False)
    tvg_name = Column(String)
    __table_args__ = (
        UniqueConstraint("group_title", "name", name="uix_group_title_name"),
    )
    tvg_logo = Column(String)
    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
    updated_at = Column(
        DateTime,
        default=lambda: datetime.now(timezone.utc),
        onupdate=lambda: datetime.now(timezone.utc),
    )


class MockChannelURL(MockBase):
    __tablename__ = "channels_urls"
    id = Column(SQLiteUUID(), primary_key=True, default=uuid.uuid4)
    channel_id = Column(
        SQLiteUUID(), ForeignKey("channels.id", ondelete="CASCADE"), nullable=False
    )
    url = Column(String, nullable=False)
    in_use = Column(Boolean, default=False, nullable=False)
    priority_id = Column(Integer, ForeignKey("priorities.id"), nullable=False)
    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
    updated_at = Column(
        DateTime,
        default=lambda: datetime.now(timezone.utc),
        onupdate=lambda: datetime.now(timezone.utc),
    )


# Create test engine
engine_mock = create_engine(
    "sqlite:///:memory:",
    connect_args={"check_same_thread": False},
    poolclass=StaticPool,
)

# Create test session
session_mock = sessionmaker(autocommit=False, autoflush=False, bind=engine_mock)


# Mock the actual database functions
def mock_get_db():
    db = session_mock()
    try:
        yield db
    finally:
        db.close()


@pytest.fixture(autouse=True)
def mock_env(monkeypatch):
    """Fixture for mocking environment variables"""
    monkeypatch.setenv("MOCK_AUTH", "true")
    monkeypatch.setenv("DB_USER", "testuser")
    monkeypatch.setenv("DB_PASSWORD", "testpass")
    monkeypatch.setenv("DB_HOST", "localhost")
    monkeypatch.setenv("DB_NAME", "testdb")
    monkeypatch.setenv("AWS_REGION", "us-east-1")


@pytest.fixture
def mock_ssm():
    """Fixture for mocking boto3 SSM client"""
    with patch("boto3.client") as mock_client:
        mock_ssm = MagicMock()
        mock_client.return_value = mock_ssm
        mock_ssm.get_parameter.return_value = {"Parameter": {"Value": "mocked_value"}}
        yield mock_ssm