from __future__ import annotations

import json
import subprocess
import tempfile
import unittest
from pathlib import Path
from unittest import mock

from tools.milestone4_adoption import (
    AdoptionProofError,
    find_wheel,
    parse_evidence,
    run_adoption_proof,
)


def _evidence() -> dict[str, object]:
    return {
        "schema_version": 1,
        "base_frontend_modules": [],
        "base_frontend_distributions": [],
        "python": {"build_status": "ok", "check_status": "ok", "node_count": 3},
        "mcp": {
            "bootstrap_status": "ok",
            "node_id": "python.class.service",
            "read_tool_count": 20,
        },
        "cpp_without_extra": {
            "code": "optional_dependency_missing",
            "install": "docforge[cpp]",
            "missing_module": "tree_sitter",
        },
    }


class Milestone4AdoptionTests(unittest.TestCase):
    def test_evidence_requires_base_isolation_python_mcp_and_actionable_cpp_failure(
        self,
    ) -> None:
        self.assertEqual(_evidence(), parse_evidence(json.dumps(_evidence())))

        for mutation in (
            {"base_frontend_modules": ["tree_sitter"]},
            {"python": {"build_status": "error", "check_status": "ok"}},
            {"mcp": {"bootstrap_status": "error"}},
            {
                "cpp_without_extra": {
                    "code": "optional_dependency_missing",
                    "install": "docforge[languages]",
                }
            },
        ):
            evidence = {**_evidence(), **mutation}
            with self.subTest(mutation=mutation), self.assertRaises(AdoptionProofError):
                parse_evidence(json.dumps(evidence))

    def test_wheel_discovery_rejects_missing_or_ambiguous_artifacts(self) -> None:
        with tempfile.TemporaryDirectory() as directory:
            root = Path(directory)
            with self.assertRaises(AdoptionProofError):
                find_wheel(root)
            first = root / "docforge-1-py3-none-any.whl"
            first.touch()
            self.assertEqual(first, find_wheel(root))
            (root / "docforge-2-py3-none-any.whl").touch()
            with self.assertRaises(AdoptionProofError):
                find_wheel(root)

    def test_orchestration_is_offline_locked_and_installs_the_wheel_without_extras(
        self,
    ) -> None:
        with tempfile.TemporaryDirectory() as directory:
            root = Path(directory).resolve()
            (root / "pyproject.toml").write_text("[project]\n", encoding="utf-8")
            (root / "uv.lock").write_text("version = 1\n", encoding="utf-8")
            commands: list[list[str]] = []

            def execute(
                arguments: list[str],
                *,
                cwd: Path,
                timeout: int,
                environment: dict[str, str] | None = None,
            ) -> subprocess.CompletedProcess[str]:
                del cwd, timeout
                commands.append(arguments)
                self.assertIsNotNone(environment)
                assert environment is not None
                self.assertEqual("1", environment["UV_OFFLINE"])
                self.assertNotIn("PYTHONPATH", environment)
                if arguments[1] == "build":
                    output = Path(arguments[arguments.index("--out-dir") + 1])
                    output.mkdir()
                    (output / "docforge-1-py3-none-any.whl").write_bytes(b"wheel")
                elif arguments[1] == "export":
                    output = Path(arguments[arguments.index("--output-file") + 1])
                    output.write_text("mcp==1\n", encoding="utf-8")
                elif arguments[1] == "venv":
                    virtual_environment = Path(arguments[-1])
                    (virtual_environment / "bin").mkdir(parents=True)
                    (virtual_environment / "bin" / "python").touch()
                elif arguments[0].endswith("/bin/python"):
                    return subprocess.CompletedProcess(
                        arguments,
                        0,
                        stdout=json.dumps(_evidence()),
                        stderr="",
                    )
                return subprocess.CompletedProcess(arguments, 0, stdout="", stderr="")

            with mock.patch(
                "tools.milestone4_adoption._run_checked",
                side_effect=execute,
            ):
                result = run_adoption_proof(root, uv="uv")

        self.assertEqual("offline", result["network"])
        wheel = result["wheel"]
        self.assertIsInstance(wheel, dict)
        assert isinstance(wheel, dict)
        self.assertEqual("docforge-1-py3-none-any.whl", wheel["filename"])
        network_commands = (
            command
            for command in commands
            if command[0] == "uv" and command[1] in {"build", "export", "pip"}
        )
        self.assertTrue(all("--offline" in command for command in network_commands))
        export = next(command for command in commands if command[1] == "export")
        self.assertIn("--frozen", export)
        self.assertIn("--no-dev", export)
        wheel_install = next(command for command in commands if command[1:3] == ["pip", "install"])
        self.assertIn("--no-deps", wheel_install)


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