"""Reviewer recipe contracts; no live provider or publication calls."""
import json
import shlex
import stat
import string
import subprocess
import sys
import unittest
from pathlib import Path

from harness.tests.impl import test_evidence_manifest as fixtures

ROOT = Path(__file__).resolve().parents[3]
REFERENCE = ROOT / "harness/agents/review/skills/gitea-code-review/references/native-review.md"
HELPER_RELATIVE = "harness/agents/impl/skills/gitea-issue-rework/scripts/evidence_manifest.py"
HEADING = "## Reviewer verification evidence recipe"


class NativeEvidenceRecipeTests(unittest.TestCase):
    def recipe(self):
        text = REFERENCE.read_text(encoding="utf-8")
        self.assertTrue(HEADING in text, "reviewer evidence-manifest recipe is missing")
        return text.split(HEADING, 1)[1].split("\n## ", 1)[0]

    def test_current_recipe_preserves_canonical_path_and_archive_contracts(self):
        section = self.recipe()
        for required in (HELPER_RELATIVE, "verification_root.py prepare", "evidence-manifest/v3",
                         "validate-archived-v2", "read-only", "run-relative", "clean checkout",
                         "no source/evidence exclusions", "0700", "0600"):
            self.assertIn(required, section)
        block = section.split("```sh\n", 1)[1].split("```", 1)[0]
        lines = block.replace("\\\n", "").splitlines()
        commands = [shlex.split(line) for line in lines if line.strip() and not line.lstrip().startswith("#")]
        self.assertEqual(len(commands), 2)
        self.assertEqual([command[:4] for command in commands],
                         [["python3", "-B", "$HARNESS_ROOT/" + HELPER_RELATIVE, "run"],
                          ["python3", "-B", "$HARNESS_ROOT/" + HELPER_RELATIVE, "validate"]])
        for command in commands:
            self.assertEqual(command[command.index("--contract-path") + 1],
                             "$HARNESS_ROOT/harness/operations/repository-cache.md")
            self.assertEqual(command[command.index("--repo-root") + 1], "$REPO_ROOT")
            self.assertEqual(command[command.index("--artifact-root") + 1], "$VERIFICATION_RUN_ROOT")
        self.assertEqual(commands[0][commands[0].index("--plan") + 1], "evidence-plan.json")
        self.assertEqual(commands[0][commands[0].index("--output") + 1], "evidence-manifest.json")
        self.assertEqual(commands[1][commands[1].index("--manifest") + 1], "evidence-manifest.json")

    def test_documented_commands_run_validate_and_reject_absolute_artifact_paths(self):
        section = self.recipe()
        fixture = fixtures.EvidenceManifestTests()
        try:
            fixture.setUp()
            # Install exact current helper bytes into an isolated canonical-shaped
            # synthetic harness. No fork, wrapper, live lease or provider is used.
            source = ROOT / HELPER_RELATIVE
            helper = fixture.root / HELPER_RELATIVE
            helper.parent.mkdir(parents=True)
            helper.write_bytes(source.read_bytes())
            self.assertEqual(helper.read_bytes(), source.read_bytes())
            fixture.plan().rename(fixture.artifacts / "evidence-plan.json")
            variables = {"HARNESS_ROOT": str(fixture.root), "REPO_ROOT": str(fixture.repo),
                         "VERIFICATION_RUN_ROOT": str(fixture.artifacts)}
            block = section.split("```sh\n", 1)[1].split("```", 1)[0]
            lines = string.Template(block).substitute(variables).replace("\\\n", "").splitlines()
            commands = [shlex.split(line) for line in lines if line.strip() and not line.lstrip().startswith("#")]
            self.assertEqual(len(commands), 2)
            self.assertEqual([command[:4] for command in commands],
                             [["python3", "-B", str(helper), "run"],
                              ["python3", "-B", str(helper), "validate"]])
            for command in commands:
                command[0] = sys.executable

            def invoke(command):
                return subprocess.run(command, cwd=fixture.repo, text=True, capture_output=True, timeout=15)

            run = invoke(commands[0])
            self.assertEqual(run.returncode, 0, run.stderr)
            manifest_path = fixture.artifacts / "evidence-manifest.json"
            manifest = json.loads(manifest_path.read_text())
            self.assertEqual(manifest["schema"], "evidence-manifest/v3")
            self.assertEqual(manifest["source_revision"], fixtures.run_git(fixture.repo, "rev-parse", "HEAD").stdout.strip())
            self.assertEqual(manifest["plan"]["path"], "evidence-plan.json")
            self.assertEqual(manifest["commands"][0]["argv"], ["git", "show", "HEAD:input.txt"])
            self.assertEqual(manifest["commands"][0]["exit_code"], 0)
            self.assertEqual(manifest["commands"][0]["output"], "hello\n")
            validated = invoke(commands[1])
            self.assertEqual(validated.returncode, 0, validated.stderr)
            before = manifest_path.read_bytes()
            mode = stat.S_IMODE(manifest_path.stat().st_mode)
            self.assertEqual(mode, 0o600)
            for flag, base_command, filename in (
                    ("--plan", commands[0], "evidence-plan.json"),
                    ("--output", commands[0], "bad-output.json"),
                    ("--manifest", commands[1], "evidence-manifest.json")):
                with self.subTest(flag=flag):
                    invalid = list(base_command)
                    invalid[invalid.index(flag) + 1] = str(fixture.artifacts / filename)
                    if flag == "--plan":
                        # Use an absent output so collision cannot mask the path rejection.
                        invalid[invalid.index("--output") + 1] = "bad-plan.json"
                    rejected = invoke(invalid)
                    self.assertEqual(rejected.returncode, 2)
                    self.assertIn("artifact path must be run-relative", rejected.stderr)
                    self.assertEqual(manifest_path.read_bytes(), before)
                    self.assertEqual(stat.S_IMODE(manifest_path.stat().st_mode), mode)
            self.assertFalse((fixture.artifacts / "bad-plan.json").exists())
            self.assertFalse((fixture.artifacts / "bad-output.json").exists())
            self.assertEqual(fixtures.run_git(fixture.repo, "status", "--porcelain").stdout, "")
        finally:
            if hasattr(fixture, "tmp"):
                fixture.tearDown()