from __future__ import annotations

import tempfile
import unittest
import urllib.error
from pathlib import Path
from unittest.mock import MagicMock, patch

from bot_bottle.release_bundle import build_bundle_index, canonical_bytes
from bot_bottle.release_manifest import ReleaseManifestError
from bot_bottle.release_publish import (
    bundle_url,
    remote_bytes,
    remote_sha256,
    request,
    upload as publish_artifact,
    publish_bundle,
)
from tests.unit.test_release_manifest import manifest


class TestReleasePublish(unittest.TestCase):
    def setUp(self) -> None:
        env = {
            "BOT_BOTTLE_RELEASE_BASE": "https://packages.example",
            "BOT_BOTTLE_RELEASE_OWNER": "owner",
            "BOT_BOTTLE_RELEASE_TOKEN": "token",
        }
        self.env = patch.dict("os.environ", env, clear=True)
        self.env.start()
        self.addCleanup(self.env.stop)

    def bundle(self, root: Path) -> tuple[dict[str, object], Path]:
        wheel = root / "bot_bottle-0.1.0-py3-none-any.whl"
        wheel.write_bytes(b"wheel")
        index = build_bundle_index(
            manifest(),
            wheel=wheel,
            wheel_url=bundle_url("1" * 40, wheel.name),
            workflow_run="actions/123",
            published_at="2026-07-27T00:00:00Z",
        )
        return index, wheel

    @staticmethod
    def wheel_sha(index: dict[str, object]) -> str:
        wheel = index["wheel"]
        assert isinstance(wheel, dict)
        digest = wheel["sha256"]
        assert isinstance(digest, str)
        return digest

    def test_publishes_wheel_then_index(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            index, wheel = self.bundle(Path(tmp))
            with patch(
                "bot_bottle.release_publish.remote_bytes", return_value=None,
            ), patch(
                "bot_bottle.release_publish.remote_sha256", return_value=None,
            ), patch("bot_bottle.release_publish.upload") as upload:
                result = publish_bundle(index, wheel)
        self.assertTrue(result.endswith("/bundle-index.json"))
        self.assertEqual(2, upload.call_count)
        self.assertIs(wheel, upload.call_args_list[0].args[1])
        self.assertEqual(canonical_bytes(index), upload.call_args_list[1].args[1])

    def test_exact_existing_bundle_is_idempotent(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            index, wheel = self.bundle(Path(tmp))
            with patch(
                "bot_bottle.release_publish.remote_bytes",
                return_value=canonical_bytes(index),
            ), patch(
                "bot_bottle.release_publish.remote_sha256",
                return_value=self.wheel_sha(index),
            ), patch("bot_bottle.release_publish.upload") as upload:
                publish_bundle(index, wheel)
        upload.assert_not_called()

    def test_rejects_partial_publication(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            index, wheel = self.bundle(Path(tmp))
            with patch(
                "bot_bottle.release_publish.remote_bytes", return_value=None,
            ), patch(
                "bot_bottle.release_publish.remote_sha256",
                return_value=self.wheel_sha(index),
            ):
                with self.assertRaisesRegex(
                    ReleaseManifestError, "administrative cleanup",
                ):
                    publish_bundle(index, wheel)

    def test_rejects_existing_bundle_with_different_index(self) -> None:
        with tempfile.TemporaryDirectory() as tmp:
            index, wheel = self.bundle(Path(tmp))
            with patch(
                "bot_bottle.release_publish.remote_bytes", return_value=b"other",
            ), patch(
                "bot_bottle.release_publish.remote_sha256",
                return_value=self.wheel_sha(index),
            ):
                with self.assertRaisesRegex(
                    ReleaseManifestError, "already differs",
                ):
                    publish_bundle(index, wheel)

    def test_request_applies_auth_and_length(self) -> None:
        result = request(
            "https://packages.example/file",
            method="PUT",
            data=b"body",
            length=4,
        )
        self.assertEqual(result.get_method(), "PUT")
        self.assertEqual(result.get_header("Authorization"), "token token")
        self.assertEqual(result.get_header("Content-length"), "4")

    @patch("bot_bottle.release_publish.urllib.request.urlopen")
    def test_remote_helpers_read_response(self, urlopen: MagicMock) -> None:
        response = urlopen.return_value.__enter__.return_value
        response.read.side_effect = [b"body"]
        self.assertEqual(
            remote_bytes("https://packages.example/file"), b"body")
        response.read.side_effect = [b"body", b""]
        self.assertEqual(
            remote_sha256("https://packages.example/file"),
            "230d8358dc8e8890b4c58deeb62912ee2"
            "f20357ae92a5cc861b98e68fe31acb5",
        )

    @patch("bot_bottle.release_publish.urllib.request.urlopen")
    def test_remote_helpers_handle_not_found(self, urlopen: MagicMock) -> None:
        urlopen.side_effect = urllib.error.HTTPError(
            "url", 404, "missing", MagicMock(), None)
        self.assertIsNone(remote_bytes("https://packages.example/file"))
        self.assertIsNone(remote_sha256("https://packages.example/file"))

    @patch("bot_bottle.release_publish.urllib.request.urlopen")
    def test_remote_helpers_report_registry_errors(
        self, urlopen: MagicMock,
    ) -> None:
        urlopen.side_effect = urllib.error.URLError("offline")
        with self.assertRaisesRegex(ReleaseManifestError, "offline"):
            remote_bytes("https://packages.example/file")
        with self.assertRaisesRegex(ReleaseManifestError, "offline"):
            remote_sha256("https://packages.example/file")

    @patch("bot_bottle.release_publish.urllib.request.urlopen")
    def test_upload_supports_bytes_and_files(self, urlopen: MagicMock) -> None:
        urlopen.return_value.__enter__.return_value = MagicMock()
        publish_artifact("https://packages.example/bytes", b"body")
        with tempfile.TemporaryDirectory() as tmp:
            source = Path(tmp) / "artifact"
            source.write_bytes(b"artifact")
            publish_artifact("https://packages.example/file", source)
        self.assertEqual(urlopen.call_count, 2)

    @patch("bot_bottle.release_publish.urllib.request.urlopen")
    def test_upload_reports_failure(self, urlopen: MagicMock) -> None:
        urlopen.side_effect = urllib.error.URLError("offline")
        with self.assertRaisesRegex(ReleaseManifestError, "publishing"):
            publish_artifact("https://packages.example/file", b"body")