"""Pytest configuration: collect testcases/*.md as test items."""

import pytest
from pathlib import Path
from runtime_test import parse_testcase, CogTestRunner


def pytest_collect_file(parent, file_path):
    if file_path.suffix == ".md" and file_path.parent.name == "testcases":
        return TestCaseFile.from_parent(parent, path=file_path)


class TestCaseFile(pytest.File):
    def collect(self):
        tc = parse_testcase(self.path)
        yield TestCaseItem.from_parent(self, name=tc["name"], testcase=tc)


class TestCaseItem(pytest.Item):
    def __init__(self, name, parent, testcase):
        super().__init__(name, parent)
        self.testcase = testcase

    def runtest(self):
        runner = CogTestRunner()
        results = runner.run(self.testcase)
        # Collect failures
        failures = [r for r in results if r["status"] == "FAIL"]
        if failures:
            msg = "\n".join(f"Step {r['step']}: {r['check']} — {r['detail']}" for r in failures)
            raise TestCaseFailure(msg, results)

    def repr_failure(self, excinfo, style=None):
        if isinstance(excinfo.value, TestCaseFailure):
            return f"\n{excinfo.value.args[0]}"
        return super().repr_failure(excinfo, style)

    def reportinfo(self):
        return self.path, 0, f"testcase: {self.name}"


class TestCaseFailure(Exception):
    def __init__(self, msg, results):
        super().__init__(msg)
        self.results = results