import pytest
from pyedm4hep import TrackerHit, CaloHit, CaloContribution, EDM4hepEvent, Particle

# Assume fixtures from conftest.py:
# - sample_event_with_hits: An EDM4hepEvent instance with tracker and calo hits.
# - sample_tracker_hit_global_id: Global ID of a specific TrackerHit in the sample event.
# - sample_calo_hit_global_id: Global ID of a specific CaloHit in the sample event.
# - sample_calo_contribution_global_id: Global ID of a specific CaloContribution.

@pytest.fixture
def tracker_hit_instance(sample_event_with_hits, sample_tracker_hit_global_id):
    return sample_event_with_hits.get_tracker_hit(sample_tracker_hit_global_id)

@pytest.fixture
def calo_hit_instance(sample_event_with_hits, sample_calo_hit_global_id):
    return sample_event_with_hits.get_calo_hit(sample_calo_hit_global_id)

@pytest.fixture
def calo_contribution_instance(sample_event_with_hits, sample_calo_contribution_global_id):
    return sample_event_with_hits.get_calo_contribution(sample_calo_contribution_global_id)

# --- TrackerHit Tests ---
def test_tracker_hit_properties(tracker_hit_instance):
    """Test core properties of TrackerHit."""
    assert tracker_hit_instance.hit_index is not None # Or specific expected ID
    assert isinstance(tracker_hit_instance.detector, str)
    # Add assertions for cell_id, time, path_length, quality, edep
    # Position: x, y, z, position
    # Momentum: px, py, pz, momentum
    # Derived Geometric: r, R, phi, theta, eta, pt
    # e.g., assert len(tracker_hit_instance.position) == 3

def test_tracker_hit_particle_relationship(tracker_hit_instance):
    """Test particle relationship of TrackerHit."""
    particle = tracker_hit_instance.get_particle()
    # Particle can be None if no link, or a Particle instance
    assert particle is None or isinstance(particle, Particle)
    # Add more specific checks if the sample_tracker_hit is known to be linked to a particle

# --- CaloHit Tests ---
def test_calo_hit_properties(calo_hit_instance):
    """Test core properties of CaloHit."""
    assert calo_hit_instance.hit_index is not None # Or specific expected ID
    assert isinstance(calo_hit_instance.detector, str)
    # Add assertions for cell_id, energy
    # Position: x, y, z, position
    # Derived Geometric: r, R, phi, theta, eta
    # Contribution indices: contribution_begin, contribution_end
    # e.g., assert calo_hit_instance.energy > 0 # if sample hit has energy

def test_calo_hit_contributions_relationship(calo_hit_instance):
    """Test contributions relationship of CaloHit."""
    contributions = calo_hit_instance.get_contributions()
    assert isinstance(contributions, list)
    if contributions: # If there are any contributions
        assert all(isinstance(c, CaloContribution) for c in contributions)
    # Add checks for expected number of contributions if known for sample_calo_hit

# --- CaloContribution Tests ---
def test_calo_contribution_properties(calo_contribution_instance):
    """Test core properties of CaloContribution."""
    assert calo_contribution_instance.contrib_index is not None # Or specific ID
    assert isinstance(calo_contribution_instance.detector, str)
    # Add assertions for pdg, energy, time
    # Step Position: step_x, step_y, step_z, step_position
    # Hit Position (inherited): x, y, z, position
    # global_hit_index (parent CaloHit index)
    # e.g., assert isinstance(calo_contribution_instance.pdg, int)

def test_calo_contribution_hit_relationship(calo_contribution_instance):
    """Test parent CaloHit relationship of CaloContribution."""
    parent_hit = calo_contribution_instance.get_hit()
    assert parent_hit is None or isinstance(parent_hit, CaloHit)
    # If sample contribution is known to belong to a hit, assert it's not None
    # and check its ID, e.g. assert parent_hit.hit_index == calo_contribution_instance.global_hit_index

def test_calo_contribution_particle_relationship(calo_contribution_instance):
    """Test particle relationship of CaloContribution."""
    particle = calo_contribution_instance.get_particle()
    assert particle is None or isinstance(particle, Particle)
    # Add more specific checks if the sample_calo_contribution is known to be linked

# Fixtures needed in conftest.py:
# @pytest.fixture(scope="session")
# def sample_event_with_hits(sample_event_file_path, sample_detector_params):
#     # Load an event known to have tracker hits, calo hits, and contributions
#     return EDM4hepEvent(file_path=sample_event_file_path, event_index=0, detector_params=sample_detector_params)

# @pytest.fixture(scope="session")
# def sample_tracker_hit_global_id(sample_event_with_hits):
#     # Return the global ID of a tracker hit from sample_event_with_hits
#     # tracker_hits_df = sample_event_with_hits.get_tracker_hits_df()
#     # if not tracker_hits_df.empty:
#     #     return tracker_hits_df.index[0] # Placeholder
#     return 0 # Placeholder

# @pytest.fixture(scope="session")
# def sample_calo_hit_global_id(sample_event_with_hits):
#     # Return the global ID of a calo hit from sample_event_with_hits
#     # calo_hits_df = sample_event_with_hits.get_calo_hits_df()
#     # if not calo_hits_df.empty:
#     #     return calo_hits_df.index[0] # Placeholder
#     return 0 # Placeholder

# @pytest.fixture(scope="session")
# def sample_calo_contribution_global_id(sample_event_with_hits):
#     # Return the global ID of a calo contribution from sample_event_with_hits
#     # contributions_df = sample_event_with_hits.get_calo_contributions_df()
#     # if not contributions_df.empty:
#     #     return contributions_df.index[0] # Placeholder
#     return 0 # Placeholder 