import hashlib
import json
import tempfile
import unittest
from pathlib import Path

try:
    import generate_posemath_report
except ModuleNotFoundError:  # Supports both discovery and direct module execution.
    from scripts import generate_posemath_report


class PosemathReportTests(unittest.TestCase):
    def test_report_is_deterministic(self):
        root = Path(__file__).resolve().parents[1]
        with tempfile.TemporaryDirectory() as directory:
            report_path = Path(directory) / "report.json"
            first = generate_posemath_report.generate(root, report_path)
            first_bytes = report_path.read_bytes()
            second = generate_posemath_report.generate(root, report_path)
            self.assertEqual(first, second)
            self.assertEqual(first_bytes, report_path.read_bytes())
            self.assertEqual(hashlib.sha256(first_bytes).hexdigest(), hashlib.sha256(report_path.read_bytes()).hexdigest())
            self.assertGreater(first["inputs"]["file_count"], 0)
            self.assertEqual(first["outputs"]["file_count"], len(generate_posemath_report.OUTPUTS))


if __name__ == "__main__":
    unittest.main()