"""
Test fixtures and configuration for Flight Radar Web App tests.

This module provides reusable fixtures for testing the API.
"""

import pytest
import sqlite3
import os
import tempfile
from fastapi.testclient import TestClient
from typing import Generator

# Import the FastAPI app
import sys
sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))

from api_server import app, rate_limiter, log_buffer
from database import get_connection


@pytest.fixture(scope="session")
def test_db_path() -> Generator[str, None, None]:
    """Create a temporary database for testing."""
    # Create temporary database
    fd, path = tempfile.mkstemp(suffix=".db")
    os.close(fd)

    # Set environment variable to use test database
    original_db = os.environ.get('DATABASE_PATH')
    os.environ['DATABASE_PATH'] = path

    yield path

    # Cleanup
    if original_db:
        os.environ['DATABASE_PATH'] = original_db
    else:
        os.environ.pop('DATABASE_PATH', None)

    try:
        os.unlink(path)
    except OSError:
        pass


@pytest.fixture(scope="function")
def clean_database(test_db_path):
    """Provide a clean database for each test."""
    # Initialize database with schema
    conn = sqlite3.connect(test_db_path)
    conn.execute("PRAGMA foreign_keys = ON")  # Enable foreign keys
    cursor = conn.cursor()

    # Read and execute schema
    schema_path = os.path.join(os.path.dirname(os.path.dirname(__file__)), 'database', 'schema.sql')
    with open(schema_path, 'r') as f:
        schema_sql = f.read()
        cursor.executescript(schema_sql)

    conn.commit()
    conn.close()

    yield test_db_path

    # Clean up all tables after test
    conn = sqlite3.connect(test_db_path)
    conn.execute("PRAGMA foreign_keys = ON")  # Enable foreign keys for cleanup
    cursor = conn.cursor()
    cursor.execute("DELETE FROM routes")
    cursor.execute("DELETE FROM scans")
    # Note: flight_searches and flight_results are not in web app schema
    conn.commit()
    conn.close()


@pytest.fixture(scope="function")
def client(clean_database) -> TestClient:
    """Provide a test client for the FastAPI app."""
    # Clear rate limiter for each test
    rate_limiter.requests.clear()

    # Clear log buffer for each test
    log_buffer.clear()

    with TestClient(app) as test_client:
        yield test_client


@pytest.fixture
def sample_scan_data():
    """Provide sample scan data for testing."""
    return {
        "origin": "BDS",
        "country": "DE",
        "start_date": "2026-04-01",
        "end_date": "2026-06-30",
        "seat_class": "economy",
        "adults": 2
    }


@pytest.fixture
def sample_route_data():
    """Provide sample route data for testing."""
    return {
        "scan_id": 1,
        "destination": "MUC",
        "destination_name": "Munich Airport",
        "destination_city": "Munich",
        "flight_count": 45,
        "airlines": '["Lufthansa", "Ryanair"]',
        "min_price": 89.99,
        "max_price": 299.99,
        "avg_price": 150.50
    }


@pytest.fixture
def create_test_scan(clean_database, sample_scan_data):
    """Create a test scan in the database."""
    def _create_scan(**kwargs):
        # Merge with defaults
        data = {**sample_scan_data, **kwargs}

        conn = sqlite3.connect(clean_database)
        conn.execute("PRAGMA foreign_keys = ON")  # Enable foreign keys
        cursor = conn.cursor()

        cursor.execute("""
            INSERT INTO scans (origin, country, start_date, end_date, status, seat_class, adults)
            VALUES (?, ?, ?, ?, ?, ?, ?)
        """, (
            data['origin'],
            data['country'],
            data['start_date'],
            data['end_date'],
            data.get('status', 'pending'),
            data['seat_class'],
            data['adults']
        ))

        scan_id = cursor.lastrowid
        conn.commit()
        conn.close()

        return scan_id

    return _create_scan


@pytest.fixture
def create_test_route(clean_database, sample_route_data):
    """Create a test route in the database."""
    def _create_route(**kwargs):
        # Merge with defaults
        data = {**sample_route_data, **kwargs}

        conn = sqlite3.connect(clean_database)
        conn.execute("PRAGMA foreign_keys = ON")  # Enable foreign keys
        cursor = conn.cursor()

        cursor.execute("""
            INSERT INTO routes (scan_id, destination, destination_name, destination_city,
                              flight_count, airlines, min_price, max_price, avg_price)
            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
        """, (
            data['scan_id'],
            data['destination'],
            data['destination_name'],
            data['destination_city'],
            data['flight_count'],
            data['airlines'],
            data['min_price'],
            data['max_price'],
            data['avg_price']
        ))

        route_id = cursor.lastrowid
        conn.commit()
        conn.close()

        return route_id

    return _create_route


# Marker helpers for categorizing tests
def pytest_configure(config):
    """Configure custom pytest markers."""
    config.addinivalue_line("markers", "unit: Unit tests (fast, isolated)")
    config.addinivalue_line("markers", "integration: Integration tests (slower)")
    config.addinivalue_line("markers", "slow: Slow tests")
    config.addinivalue_line("markers", "database: Tests that interact with database")
    config.addinivalue_line("markers", "api: Tests for API endpoints")