"""
Pytest configuration and fixtures for webapp testing.
Feature: 012-profile-contact-ui
"""

import os
import sqlite3
import tempfile
from typing import Generator

import pytest
from flask import Flask
from flask.testing import FlaskClient

# Set test environment variables before importing app
os.environ["SECRET_KEY"] = "test-secret-key"
os.environ["BACKEND_API_URL"] = "http://test-api:8080/v1"
os.environ["HF_CLIENT_ID"] = "test-client-id"
os.environ["HF_CLIENT_SECRET"] = "test-client-secret"
os.environ["HF_REDIRECT_URI"] = "http://localhost:5000/callback"


@pytest.fixture
def app() -> Generator[Flask, None, None]:
    """Create and configure Flask app for testing."""
    from webapp.src.app import create_app

    # Create temporary database file
    db_fd, db_path = tempfile.mkstemp(suffix=".db")
    os.environ["DATABASE_PATH"] = db_path

    # Create app
    app = create_app()
    app.config["TESTING"] = True
    app.config["WTF_CSRF_ENABLED"] = False

    # Initialize database schema
    with open("webapp/migrations/001_create_tables.sql", "r") as f:
        schema = f.read()

    conn = sqlite3.connect(db_path)
    conn.executescript(schema)
    conn.close()

    yield app

    # Cleanup
    os.close(db_fd)
    os.unlink(db_path)


@pytest.fixture
def client(app: Flask) -> FlaskClient:
    """Create test client for making requests."""
    return app.test_client()


@pytest.fixture
def runner(app: Flask):
    """Create CLI test runner."""
    return app.test_cli_runner()


@pytest.fixture
def authenticated_client(client: FlaskClient, monkeypatch) -> FlaskClient:
    """Create authenticated test client with mocked OAuth."""
    # Mock OAuth flow
    def mock_authorize_redirect(*args, **kwargs):
        from flask import redirect

        return redirect("/callback?code=test-code")

    def mock_fetch_token(*args, **kwargs):
        return {"access_token": "test-token", "token_type": "Bearer"}

    def mock_fetch_userinfo(*args, **kwargs):
        return {
            "preferred_username": "testuser",
            "name": "Test User",
            "picture": "https://example.com/avatar.jpg",
        }

    # Import and patch auth service
    from webapp.src.services.auth_service import auth_service

    monkeypatch.setattr(auth_service.hf, "authorize_redirect", mock_authorize_redirect)
    monkeypatch.setattr(auth_service, "fetch_token", mock_fetch_token)
    monkeypatch.setattr(auth_service, "fetch_userinfo", mock_fetch_userinfo)

    # Mock backend API calls
    def mock_create_session(*args, **kwargs):
        return {
            "id": kwargs.get("session_id", "testuser_session"),
            "user_id": "testuser",
            "created_at": "2025-01-01T00:00:00Z",
        }

    from webapp.src.services import backend_client

    monkeypatch.setattr(
        backend_client.backend_client, "create_session", mock_create_session
    )

    # Perform login flow
    with client.session_transaction() as sess:
        sess["user_id"] = "testuser"
        sess["display_name"] = "Test User"
        sess["profile_picture_url"] = "https://example.com/avatar.jpg"
        sess["session_id"] = "testuser_session"
        sess["access_token"] = "test-token"

    return client


@pytest.fixture
def test_user_profile():
    """Create test user profile data."""
    return {
        "user_id": "testuser",
        "display_name": "Test User",
        "profile_picture_url": "https://example.com/avatar.jpg",
        "session_id": "testuser_session",
        "created_at": "2025-01-01T00:00:00Z",
    }


@pytest.fixture
def test_contact_session():
    """Create test contact session data."""
    return {
        "session_id": "testuser_12345678-1234-1234-1234-123456789abc",
        "user_id": "testuser",
        "display_name": "Alice Smith",
        "last_interaction": "2025-01-01T12:00:00Z",
        "created_at": "2025-01-01T10:00:00Z",
    }


@pytest.fixture
def mock_backend_api(monkeypatch):
    """Mock all backend API calls for testing."""
    from webapp.src.services import backend_client

    class MockBackendAPI:
        """Mock backend API client."""

        def __init__(self):
            self.sessions = {}
            self.messages = {}

        def create_session(self, session_id: str, user_id: str, is_reference: bool = False):
            self.sessions[session_id] = {
                "id": session_id,
                "user_id": user_id,
                "is_reference": is_reference,
                "created_at": "2025-01-01T00:00:00Z",
            }
            self.messages[session_id] = []
            return self.sessions[session_id]

        def get_session(self, session_id: str):
            if session_id not in self.sessions:
                raise backend_client.BackendAPIError(f"Session {session_id} not found")
            return {
                **self.sessions[session_id],
                "messages": self.messages.get(session_id, []),
            }

        def send_message(self, session_id: str, content: str, mode: str = "chat", sender: str = "user"):
            if session_id not in self.messages:
                self.messages[session_id] = []

            message = {
                "message_id": f"msg_{len(self.messages[session_id])}",
                "session_id": session_id,
                "mode": mode,
                "content": content,
                "sender": sender if mode == "chat" else None,
                "created_at": "2025-01-01T12:00:00Z",
            }
            self.messages[session_id].append(message)
            return message

        def list_sessions(self, user_id: str):
            return [s for s in self.sessions.values() if s["user_id"] == user_id]

        def get_messages(self, session_id: str, mode: str = None):
            messages = self.messages.get(session_id, [])
            if mode:
                messages = [m for m in messages if m["mode"] == mode]
            return messages

    mock_api = MockBackendAPI()
    monkeypatch.setattr(backend_client, "backend_client", mock_api)

    return mock_api