"""
Pytest configuration and fixtures for dreader-hal tests.
"""

import os
import sys
import pytest
from unittest.mock import MagicMock


def is_raspberry_pi():
    """
    Check if running on Raspberry Pi hardware.

    Returns:
        bool: True if running on RPi, False otherwise
    """
    try:
        # Check for BCM2xxx processor (Raspberry Pi)
        with open('/proc/cpuinfo', 'r') as f:
            cpuinfo = f.read()
            return 'BCM2' in cpuinfo or 'BCM3' in cpuinfo
    except (FileNotFoundError, PermissionError):
        return False


# Mock RPi.GPIO at module level if not on Raspberry Pi
if not is_raspberry_pi():
    # Create a mock GPIO module
    mock_gpio = MagicMock()
    mock_gpio.BCM = 11
    mock_gpio.OUT = 0
    mock_gpio.IN = 1
    mock_gpio.HIGH = 1
    mock_gpio.LOW = 0
    mock_gpio.PUD_UP = 22
    mock_gpio.FALLING = 32
    mock_gpio.setmode = MagicMock()
    mock_gpio.setup = MagicMock()
    mock_gpio.output = MagicMock()
    mock_gpio.input = MagicMock(return_value=0)
    mock_gpio.add_event_detect = MagicMock()
    mock_gpio.remove_event_detect = MagicMock()
    mock_gpio.cleanup = MagicMock()

    # Inject mock into sys.modules before any tests import it
    if 'RPi' not in sys.modules:
        sys.modules['RPi'] = MagicMock()
    sys.modules['RPi.GPIO'] = mock_gpio
    sys.modules['RPi'].GPIO = mock_gpio


# Create pytest markers
def pytest_configure(config):
    """Register custom pytest markers."""
    config.addinivalue_line(
        "markers", "rpi_only: mark test as requiring Raspberry Pi hardware"
    )
    config.addinivalue_line(
        "markers", "hardware: mark test as requiring physical hardware"
    )


def pytest_collection_modifyitems(config, items):
    """
    Automatically skip tests that require RPi hardware when not on RPi.
    """
    if not is_raspberry_pi():
        skip_rpi = pytest.mark.skip(reason="Test requires Raspberry Pi hardware")
        for item in items:
            if "rpi_only" in item.keywords:
                item.add_marker(skip_rpi)