import re
import sys
import types

import pytest

from dto.annotationClass import AnnotationClass


def _stub_train_imports():
    if getattr(_stub_train_imports, "_done", False):
        return
    for _name in ("ultralytics", "boto3", "netron", "requests"):
        if _name not in sys.modules:
            sys.modules[_name] = types.ModuleType(_name)
    sys.modules["ultralytics"].YOLO = type("YOLO", (), {})
    sys.modules["boto3"].client = lambda *a, **k: None
    _stub_train_imports._done = True


def _name_lines_under_names(text):
    lines = text.splitlines()
    out = []
    in_block = False
    for line in lines:
        s = line.strip()
        if s == "names:":
            in_block = True
            continue
        if s.startswith("nc:"):
            break
        if in_block and s.startswith("-"):
            out.append(s)
    return out


_PLACEHOLDER_RE = re.compile(r"^-\s+Class-\d+\s*$")


@pytest.fixture
def data_yaml_text(monkeypatch, tmp_path, fixture_classes_json):
    _stub_train_imports()
    import train

    monkeypatch.setattr(train, "today_dataset", str(tmp_path))
    train.create_yaml()
    return (tmp_path / "data.yaml").read_text(encoding="utf-8")


def test_bt_cls_01_base_classes(fixture_classes_json):
    d = AnnotationClass.read_json()
    norm = {k: d[k] for k in range(17)}
    assert len(norm) == 17
    assert len({v.id for v in norm.values()}) == 17


def test_bt_cls_02_weather_expansion(fixture_classes_json):
    d = AnnotationClass.read_json()
    assert d[0].name == "ArmorVehicle"
    assert d[20].name == "ArmorVehicle(Wint)"
    assert d[40].name == "ArmorVehicle(Night)"


@pytest.mark.resource_limit
def test_bt_cls_03_yaml_generation(data_yaml_text):
    text = data_yaml_text
    assert "nc: 80" in text
    names = _name_lines_under_names(text)
    placeholders = [ln for ln in names if _PLACEHOLDER_RE.match(ln)]
    named = [ln for ln in names if not _PLACEHOLDER_RE.match(ln)]
    assert len(names) == 80
    assert len(placeholders) == 29
    assert len(named) == 51


@pytest.mark.resource_limit
def test_rl_cls_01_total_class_count(data_yaml_text):
    names = _name_lines_under_names(data_yaml_text)
    assert len(names) == 80