import importlib.util
from pathlib import Path
import sys

import pytest

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')")


def test_collect_files_requires_index(tmp_path):
    with pytest.raises(DeployError, match="index.html"):
        collect_files(tmp_path)


def test_collect_files_rejects_symlinks(tmp_path):
    write_site(tmp_path)
    (tmp_path / "linked").symlink_to(tmp_path / "index.html")
    with pytest.raises(DeployError, match="symbolic links"):
        collect_files(tmp_path)


def test_manifest_round_trip(tmp_path):
    write_site(tmp_path)
    files = collect_files(tmp_path)
    manifest = manifest_for(files)
    parsed = parse_manifest(__import__("json").dumps(manifest).encode())
    assert parsed["index.html"]["sha256"] == files["index.html"].sha256


def test_manifest_rejects_unsafe_remote_path():
    raw = b'{"version": 1, "files": {"../other-site/index.html": {}}}'
    with pytest.raises(DeployError, match="unsafe path"):
        parse_manifest(raw)


def test_bunny_plan_uploads_assets_before_html_and_removes_stale(tmp_path):
    write_site(tmp_path)
    files = collect_files(tmp_path)
    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)
    assert upload == ["assets/app.js", "index.html"]
    assert delete == ["old.css"]


def test_bunny_plan_skips_unchanged_files(tmp_path):
    write_site(tmp_path)
    files = collect_files(tmp_path)
    remote = manifest_for(files)["files"]
    assert bunny_plan(files, remote) == ([], [])