"""Synthetic recovery metadata tests, not Blender acceptance evidence."""
import hashlib
import json
import pathlib
import tempfile
import unittest
from recover_behavior_contracts import candidate, KINDS


class RecoveryTests(unittest.TestCase):
    def setUp(self):
        self.temp = tempfile.TemporaryDirectory()
        self.addCleanup(self.temp.cleanup)
        self.root = pathlib.Path(self.temp.name)
        self.worker = self.root / "run/worker-result.json"
        self.worker.parent.mkdir()
        self.contract = {"job": "SCULPT", "task": "TASK", "result": {"sourceUnits": ["stroke", "remesh"]}}
        self.cases = [{"id": kind, "kind": kind, "unitIds": ["stroke", "remesh"],
                       "receipt": f"run/{kind}.json"} for kind in sorted(KINDS)]
        self.worker.write_text(json.dumps({"cases": self.cases, "sourceUnits": ["stroke", "remesh"]}))
        (self.root / "source.cc").write_text("synthetic source")
        def digest(path):
            return hashlib.sha256(path.read_bytes()).hexdigest()
        artifacts = []
        for case in self.cases:
            path = self.root / case["receipt"]
            path.write_text(json.dumps({"status": "PASS", "runtime": "CHROMIUM_WEBENGINE",
                "caseId": case["id"], "kind": case["kind"], "unitIds": case["unitIds"]}))
            artifacts.append({"path": case["receipt"], "sha256": digest(path)})
        self.proof = self.root / "run/verified-receipt.json"
        self.proof.write_text(json.dumps({"status": "verified", "job": "SCULPT", "queueTask": "TASK",
            "sourceUnits": ["stroke", "remesh"], "artifacts": artifacts,
            "inputs": {"source.cc": digest(self.root / "source.cc")}}))

    def test_valid_metadata_is_rebound_for_fresh_execution(self):
        result = candidate(self.worker, self.contract, self.root)
        self.assertIsNotNone(result)
        self.assertTrue(all(case["receipt"].startswith("unallocated/") for case in result["cases"]))

    def test_case_count_without_verified_receipt_is_rejected(self):
        self.proof.unlink()
        self.assertIsNone(candidate(self.worker, self.contract, self.root))

    def test_scope_cannot_drop_remesh(self):
        self.worker.write_text(json.dumps({"cases": self.cases, "sourceUnits": ["stroke"]}))
        self.assertIsNone(candidate(self.worker, self.contract, self.root))

    def test_missing_receipt_is_rejected(self):
        (self.root / self.cases[0]["receipt"]).unlink()
        self.assertIsNone(candidate(self.worker, self.contract, self.root))

    def test_changed_source_is_rejected(self):
        (self.root / "source.cc").write_text("modified source")
        self.assertIsNone(candidate(self.worker, self.contract, self.root))


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