import json

import pytest

from furtka.manifest import Manifest, ManifestError, load_manifest

VALID_MANIFEST = {
    "name": "fileshare",
    "display_name": "Network Files",
    "version": "0.1.0",
    "description": "SMB share",
    "volumes": ["files"],
    "ports": [445],
    "icon": "icon.svg",
}


def _write_app(tmp_path, name, payload):
    app_dir = tmp_path / name
    app_dir.mkdir()
    (app_dir / "manifest.json").write_text(json.dumps(payload))
    return app_dir / "manifest.json"


def test_load_valid_manifest(tmp_path):
    path = _write_app(tmp_path, "fileshare", VALID_MANIFEST)
    m = load_manifest(path)
    assert isinstance(m, Manifest)
    assert m.name == "fileshare"
    assert m.volumes == ("files",)
    assert m.ports == (445,)


def test_volume_namespacing(tmp_path):
    path = _write_app(tmp_path, "fileshare", VALID_MANIFEST)
    m = load_manifest(path)
    assert m.volume_name("files") == "furtka_fileshare_files"


def test_unknown_volume_raises(tmp_path):
    path = _write_app(tmp_path, "fileshare", VALID_MANIFEST)
    m = load_manifest(path)
    with pytest.raises(ManifestError):
        m.volume_name("does-not-exist")


def test_missing_required_field(tmp_path):
    bad = dict(VALID_MANIFEST)
    del bad["display_name"]
    path = _write_app(tmp_path, "fileshare", bad)
    with pytest.raises(ManifestError, match="display_name"):
        load_manifest(path)


def test_name_must_match_when_expected_name_given(tmp_path):
    # Scanner passes expected_name=<folder name> so /var/lib/furtka/apps/X/
    # can't lie about its own identity.
    path = _write_app(tmp_path, "wrong-folder", VALID_MANIFEST)
    with pytest.raises(ManifestError, match="must equal 'wrong-folder'"):
        load_manifest(path, expected_name="wrong-folder")


def test_name_check_skipped_without_expected_name(tmp_path):
    # Installer loads from arbitrary source paths (e.g. /tmp/my-tweaked-app/)
    # — the source folder name shouldn't matter, only the manifest's own name.
    path = _write_app(tmp_path, "any-folder-name", VALID_MANIFEST)
    m = load_manifest(path)
    assert m.name == "fileshare"


def test_invalid_json(tmp_path):
    app = tmp_path / "fileshare"
    app.mkdir()
    (app / "manifest.json").write_text("{not json")
    with pytest.raises(ManifestError, match="invalid JSON"):
        load_manifest(app / "manifest.json")


def test_volumes_wrong_type(tmp_path):
    bad = dict(VALID_MANIFEST, volumes="files")
    path = _write_app(tmp_path, "fileshare", bad)
    with pytest.raises(ManifestError, match="volumes"):
        load_manifest(path)


def test_ports_wrong_type(tmp_path):
    bad = dict(VALID_MANIFEST, ports=["445"])
    path = _write_app(tmp_path, "fileshare", bad)
    with pytest.raises(ManifestError, match="ports"):
        load_manifest(path)