from __future__ import annotations

import json
import shutil
import subprocess
import sys
from pathlib import Path

ROOT = Path(__file__).resolve().parents[2]
SCRIPTS_DIR = ROOT / "scripts"


def read_script(name: str) -> str:
    return (SCRIPTS_DIR / name).read_text(encoding="utf-8")


def test_install_linux_script_exists_and_supports_required_flags() -> None:
    script = read_script("install-linux.sh")
    assert 'parse_common_args "$@"' in script
    assert "verify_debian_13_amd64" in script
    assert 'run_install_flow "Debian 13 amd64"' in script


def test_update_linux_script_exists_and_uses_common_arg_parser() -> None:
    script = read_script("update-linux.sh")
    assert 'parse_common_args "$@"' in script
    assert "verify_debian_13_amd64" in script
    assert 'run_update_flow "Debian 13 amd64"' in script


def test_common_install_library_contains_required_linux_behaviour() -> None:
    script = read_script("lib/install-common.sh")
    assert "python3-venv" in script
    assert "sqlite3" in script
    assert "sudo" in script
    assert "nodejs" in script
    assert "npm" in script
    assert "python3-ola" in script
    assert "ola-python" in script
    assert "olad" in script
    assert 'PNPM_REQUIRED_VERSION="10.28.2"' in script
    assert "--system-site-packages" in script
    assert "/opt/tuxdmx.new" in script
    assert "/opt/tuxdmx" in script
    assert "/var/lib/tuxdmx" in script
    assert "/var/log/tuxdmx" in script
    assert "/etc/tuxdmx" in script
    assert "dialout,plugdev,audio" in script
    assert "frontend/dist/index.html" in script
    assert "pip\" check" in script
    assert "apt-listchanges" in script
    assert "debconf" in script
    assert "Ignorerer kendt Debian pip check-advarsel" in script
    assert "import greenlet" in script
    assert "import sqlalchemy" in script
    assert "import ola" in script
    assert "backend/app/main.py" in script
    assert "systemctl status \"$SYSTEMD_UNIT_NAME\" --no-pager --full" in script
    assert "journalctl -u \"$SYSTEMD_UNIT_NAME\" -n 200 --no-pager" in script
    assert "update-rc.d" in script
    assert "systemctl is-enabled \"$OLA_SYSTEMD_UNIT\"" in script
    assert "service \"$OLA_SERVICE_NAME\" restart" in script
    assert "--warning=no-file-changed" in script
    assert "--exclude=\"./tuxdmx.json.log\"" in script
    assert "Kunne ikke oprette backup af datamappe." in script
    assert "http://127.0.0.1:8000/api/v1/health" in script
    assert "/etc/sudoers.d/tuxdmx-control" in script
    assert "control-system.sh restart-service" in script
    assert "control-system.sh reboot-host" in script
    assert "restore_rollbacks" in script


def test_pi_and_linux_installers_share_common_library() -> None:
    for name in (
        "install-pi.sh",
        "install-linux.sh",
        "update-pi.sh",
        "update-linux.sh",
    ):
        script = read_script(name)
        assert 'source "$SCRIPT_DIR/lib/install-common.sh"' in script


def test_systemd_unit_contains_required_production_fields() -> None:
    unit = (ROOT / "systemd" / "tuxdmx.service").read_text(encoding="utf-8")
    assert "WorkingDirectory=/opt/tuxdmx" in unit
    assert "After=network-online.target olad.service" in unit
    assert "Wants=network-online.target olad.service" in unit
    assert "Restart=on-failure" in unit
    assert "UMask=0027" in unit


def test_alembic_ini_uses_path_relative_to_config_file() -> None:
    alembic_ini = (ROOT / "backend" / "alembic.ini").read_text(encoding="utf-8")
    assert "script_location = %(here)s/alembic" in alembic_ini


def test_package_manager_and_requirements_are_locked() -> None:
    package_json = json.loads((ROOT / "package.json").read_text(encoding="utf-8"))
    assert package_json["packageManager"] == "pnpm@10.28.2"
    assert package_json["engines"]["node"] == "20.x"
    assert package_json["engines"]["pnpm"] == "10.28.2"

    requirements = (ROOT / "requirements.lock").read_text(encoding="utf-8")
    assert "greenlet==" in requirements
    assert "sqlalchemy==" in requirements


def test_shell_scripts_parse_with_bash_when_available() -> None:
    bash = shutil.which("bash")
    if bash is None:
        return
    if "system32\\bash.exe" in bash.lower():
        return

    for script_name in (
        "scripts/install-pi.sh",
        "scripts/update-pi.sh",
        "scripts/install-linux.sh",
        "scripts/update-linux.sh",
        "scripts/uninstall-linux.sh",
        "scripts/lib/install-common.sh",
    ):
        subprocess.run(
            [bash, "-n", str(ROOT / script_name)],
            check=True,
            cwd=ROOT,
        )


def test_shellcheck_when_available() -> None:
    shellcheck = shutil.which("shellcheck")
    if shellcheck is None:
        return

    subprocess.run(
        [
            shellcheck,
            str(ROOT / "scripts/install-pi.sh"),
            str(ROOT / "scripts/update-pi.sh"),
            str(ROOT / "scripts/install-linux.sh"),
            str(ROOT / "scripts/update-linux.sh"),
            str(ROOT / "scripts/lib/install-common.sh"),
        ],
        check=True,
        cwd=ROOT,
    )


def test_pip_check_and_greenlet_import() -> None:
    subprocess.run([sys.executable, "-m", "pip", "check"], check=True, cwd=ROOT)
    subprocess.run(
        [sys.executable, "-c", "import greenlet; print(greenlet.__version__)"],
        check=True,
        cwd=ROOT,
    )