import importlib.util
import json
from pathlib import Path
import sys
import tempfile
import unittest

MODULE_PATH = Path(__file__).resolve().parents[1] / "static_site.py"
SPEC = importlib.util.spec_from_file_location("static_site_deploy", MODULE_PATH)
assert SPEC and SPEC.loader
static_site = importlib.util.module_from_spec(SPEC)
sys.modules[SPEC.name] = static_site
SPEC.loader.exec_module(static_site)

DeployError = static_site.DeployError
bunny_plan = static_site.bunny_plan
collect_files = static_site.collect_files
manifest_for = static_site.manifest_for
parse_manifest = static_site.parse_manifest


def write_site(root: Path) -> None:
    (root / "assets").mkdir()
    (root / "index.html").write_text("<h1>Hello</h1>")
    (root / "assets" / "app.js").write_text("console.log('hello')")


class StaticSiteTests(unittest.TestCase):
    def test_collect_files_requires_index(self) -> None:
        with tempfile.TemporaryDirectory() as directory:
            with self.assertRaisesRegex(DeployError, "index.html"):
                collect_files(Path(directory))

    def test_collect_files_rejects_symlinks(self) -> None:
        with tempfile.TemporaryDirectory() as directory:
            root = Path(directory)
            write_site(root)
            (root / "linked").symlink_to(root / "index.html")
            with self.assertRaisesRegex(DeployError, "symbolic links"):
                collect_files(root)

    def test_manifest_round_trip(self) -> None:
        with tempfile.TemporaryDirectory() as directory:
            root = Path(directory)
            write_site(root)
            files = collect_files(root)
            manifest = manifest_for(files)
            parsed = parse_manifest(json.dumps(manifest).encode())
            self.assertEqual(
                parsed["index.html"]["sha256"], files["index.html"].sha256
            )

    def test_manifest_rejects_unsafe_remote_path(self) -> None:
        raw = b'{"version": 1, "files": {"../other-site/index.html": {}}}'
        with self.assertRaisesRegex(DeployError, "unsafe path"):
            parse_manifest(raw)

    def test_bunny_plan_uploads_assets_before_html_and_removes_stale(self) -> None:
        with tempfile.TemporaryDirectory() as directory:
            root = Path(directory)
            write_site(root)
            files = collect_files(root)
            remote = {
                "index.html": {"sha256": "old", "size": 1},
                "assets/app.js": {"sha256": "old", "size": 1},
                "old.css": {"sha256": "old", "size": 1},
            }
            upload, delete = bunny_plan(files, remote)
            self.assertEqual(upload, ["assets/app.js", "index.html"])
            self.assertEqual(delete, ["old.css"])

    def test_bunny_plan_skips_unchanged_files(self) -> None:
        with tempfile.TemporaryDirectory() as directory:
            root = Path(directory)
            write_site(root)
            files = collect_files(root)
            remote = manifest_for(files)["files"]
            self.assertEqual(bunny_plan(files, remote), ([], []))


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