"""Routes for type='script' overlays: create, /script (update body),
/wipe, /build. Permissions mirror workshop overlays (owner or admin)."""
from __future__ import annotations

import pytest
from sqlalchemy import select

from l4d2web.app import create_app
from l4d2web.auth import hash_password
from l4d2web.db import init_db, session_scope
from l4d2web.models import Job, Overlay, User


@pytest.fixture
def app(tmp_path, monkeypatch):
    db_url = f"sqlite:///{tmp_path/'script-routes.db'}"
    monkeypatch.setenv("DATABASE_URL", db_url)
    monkeypatch.setenv("LEFT4ME_ROOT", str(tmp_path))
    flask_app = create_app({"TESTING": True, "DATABASE_URL": db_url, "SECRET_KEY": "test"})
    init_db()
    return flask_app


@pytest.fixture
def alice_id(app) -> int:
    with session_scope() as s:
        user = User(username="alice", password_digest=hash_password("x"), admin=False)
        s.add(user)
        s.flush()
        return user.id


@pytest.fixture
def bob_id(app) -> int:
    with session_scope() as s:
        user = User(username="bob", password_digest=hash_password("x"), admin=False)
        s.add(user)
        s.flush()
        return user.id


@pytest.fixture
def admin_id(app) -> int:
    with session_scope() as s:
        user = User(username="admin", password_digest=hash_password("x"), admin=True)
        s.add(user)
        s.flush()
        return user.id


def _client_for(app, user_id: int):
    client = app.test_client()
    with client.session_transaction() as sess:
        sess["user_id"] = user_id
        sess["csrf_token"] = "test-token"
    return client


def _create_script_overlay(app, user_id: int, *, name: str = "x") -> int:
    client = _client_for(app, user_id)
    response = client.post(
        "/overlays",
        data={"name": name, "type": "script"},
        headers={"X-CSRF-Token": "test-token"},
    )
    assert response.status_code == 302, response.get_data(as_text=True)
    with session_scope() as s:
        return s.scalar(select(Overlay.id).where(Overlay.name == name))


def test_create_script_overlay(app, alice_id) -> None:
    client = _client_for(app, alice_id)
    response = client.post(
        "/overlays",
        data={"name": "first", "type": "script"},
        headers={"X-CSRF-Token": "test-token"},
    )
    assert response.status_code == 302
    with session_scope() as s:
        overlay = s.query(Overlay).filter_by(name="first").one()
        assert overlay.type == "script"
        assert overlay.script == ""
        assert overlay.last_build_status == ""
        assert overlay.user_id == alice_id
        assert overlay.path == str(overlay.id)


def test_admin_creates_system_wide_script_overlay(app, admin_id) -> None:
    client = _client_for(app, admin_id)
    response = client.post(
        "/overlays",
        data={"name": "system", "type": "script", "system_wide": "1"},
        headers={"X-CSRF-Token": "test-token"},
    )
    assert response.status_code == 302
    with session_scope() as s:
        overlay = s.query(Overlay).filter_by(name="system").one()
        assert overlay.user_id is None


def test_non_admin_system_wide_flag_is_ignored(app, alice_id) -> None:
    client = _client_for(app, alice_id)
    response = client.post(
        "/overlays",
        data={"name": "evil", "type": "script", "system_wide": "1"},
        headers={"X-CSRF-Token": "test-token"},
    )
    assert response.status_code == 302
    with session_scope() as s:
        overlay = s.query(Overlay).filter_by(name="evil").one()
        assert overlay.user_id == alice_id


def test_update_script_body_enqueues_build(app, alice_id) -> None:
    overlay_id = _create_script_overlay(app, alice_id)
    client = _client_for(app, alice_id)

    r1 = client.post(
        f"/overlays/{overlay_id}/script",
        data={"script": "echo new"},
        headers={"X-CSRF-Token": "test-token"},
    )
    assert r1.status_code == 302
    with session_scope() as s:
        overlay = s.query(Overlay).filter_by(id=overlay_id).one()
        assert overlay.script == "echo new"
        jobs = s.query(Job).filter_by(operation="build_overlay", overlay_id=overlay_id).all()
        assert len(jobs) == 1

    # Coalesce against pending.
    r2 = client.post(
        f"/overlays/{overlay_id}/script",
        data={"script": "echo newer"},
        headers={"X-CSRF-Token": "test-token"},
    )
    assert r2.status_code == 302
    with session_scope() as s:
        jobs = s.query(Job).filter_by(operation="build_overlay", overlay_id=overlay_id).all()
        assert len(jobs) == 1


def test_manual_rebuild(app, alice_id) -> None:
    overlay_id = _create_script_overlay(app, alice_id)
    client = _client_for(app, alice_id)

    r1 = client.post(
        f"/overlays/{overlay_id}/build",
        headers={"X-CSRF-Token": "test-token"},
    )
    assert r1.status_code == 302
    with session_scope() as s:
        jobs = s.query(Job).filter_by(operation="build_overlay", overlay_id=overlay_id).all()
        assert len(jobs) == 1

    # Coalesce.
    r2 = client.post(
        f"/overlays/{overlay_id}/build",
        headers={"X-CSRF-Token": "test-token"},
    )
    assert r2.status_code == 302
    with session_scope() as s:
        jobs = s.query(Job).filter_by(operation="build_overlay", overlay_id=overlay_id).all()
        assert len(jobs) == 1


def test_wipe_runs_find_delete(app, alice_id, monkeypatch) -> None:
    overlay_id = _create_script_overlay(app, alice_id)

    # Pre-set a "successful" status so we can verify wipe resets it.
    with session_scope() as s:
        overlay = s.query(Overlay).filter_by(id=overlay_id).one()
        overlay.last_build_status = "ok"

    captured: dict = {}

    def fake_run(overlay_id_arg, script_text, *, on_stdout, on_stderr, should_cancel):
        captured["overlay_id"] = overlay_id_arg
        captured["script"] = script_text

    from l4d2web.services import overlay_builders
    monkeypatch.setattr(overlay_builders, "run_sandboxed_script", fake_run)

    client = _client_for(app, alice_id)
    response = client.post(
        f"/overlays/{overlay_id}/wipe",
        headers={"X-CSRF-Token": "test-token"},
    )
    assert response.status_code == 302
    assert captured["overlay_id"] == overlay_id
    assert captured["script"] == "find /overlay -mindepth 1 -delete"

    with session_scope() as s:
        overlay = s.query(Overlay).filter_by(id=overlay_id).one()
        assert overlay.last_build_status == ""
        # Wipe does NOT auto-enqueue a rebuild.
        jobs = s.query(Job).filter_by(operation="build_overlay", overlay_id=overlay_id).all()
        assert len(jobs) == 0


def test_wipe_refuses_during_running_build(app, alice_id, monkeypatch) -> None:
    overlay_id = _create_script_overlay(app, alice_id)

    # Mark a build as running for this overlay.
    with session_scope() as s:
        s.add(
            Job(
                user_id=alice_id,
                server_id=None,
                overlay_id=overlay_id,
                operation="build_overlay",
                state="running",
            )
        )

    invocations: list = []

    def fake_run(*args, **kwargs):
        invocations.append((args, kwargs))

    from l4d2web.services import overlay_builders
    monkeypatch.setattr(overlay_builders, "run_sandboxed_script", fake_run)

    client = _client_for(app, alice_id)
    response = client.post(
        f"/overlays/{overlay_id}/wipe",
        headers={"X-CSRF-Token": "test-token"},
    )
    assert response.status_code == 409
    assert invocations == []


def test_permissions_non_owner_denied(app, alice_id, bob_id) -> None:
    overlay_id = _create_script_overlay(app, alice_id, name="alice-private")
    bob = _client_for(app, bob_id)

    r1 = bob.post(
        f"/overlays/{overlay_id}/script",
        data={"script": "boom"},
        headers={"X-CSRF-Token": "test-token"},
    )
    assert r1.status_code == 403


def test_permissions_admin_can_edit_any(app, alice_id, admin_id) -> None:
    overlay_id = _create_script_overlay(app, alice_id, name="alice-private")
    admin = _client_for(app, admin_id)

    r1 = admin.post(
        f"/overlays/{overlay_id}/script",
        data={"script": "echo admin"},
        headers={"X-CSRF-Token": "test-token"},
    )
    assert r1.status_code == 302
    with session_scope() as s:
        overlay = s.query(Overlay).filter_by(id=overlay_id).one()
        assert overlay.script == "echo admin"