"""Objet de scène kind="fond" (image de fond, voir
game_engine/scenes/add_scene_object.py) : posé à sa taille RÉELLE (voir
game_engine/labels/background_library.py), derrière tout le reste
(z_index très négatif), insensible au clic — et si plus grand que la
scène, "monde" que la caméra suit en défilant derrière le personnage
(voir static/game/js/play/personnage-controller.js, testé côté client dans
static/game/js/play/__tests__/personnage-controller.test.js)."""

import re
from collections.abc import Callable
from typing import Any

from flask.testing import FlaskClient

import game_engine
from tests.conftest import not_none


def _create_jeu2d_game(
    client: FlaskClient, tmp_game_slug_cleanup: Callable[[str], str], name: str = "pytest_background"
) -> Any:
    resp = client.post("/games/new", data={"name": name}, follow_redirects=False)
    slug = tmp_game_slug_cleanup(resp.headers["Location"].rstrip("/").split("/")[-1])
    screen_id = game_engine.create_screen(slug, "Scène 1", kind="jeu_2d")
    return slug, screen_id


def _a_background_slug() -> Any:
    assert game_engine.BACKGROUND_LIBRARY, (
        "aucune image de fond générée — lancer scripts/game/generate_background_manifest.py"
    )
    return next(iter(game_engine.BACKGROUND_LIBRARY))


def test_background_library_is_built_from_the_generated_manifest() -> None:
    slug = _a_background_slug()
    background = game_engine.BACKGROUND_LIBRARY[slug]
    assert background["url"].startswith("/static/game/backgrounds/")
    assert background["width"] > 0 and background["height"] > 0


def test_adding_a_fond_object_uses_the_image_real_size_and_sits_behind_everything(
    client: FlaskClient, tmp_game_slug_cleanup: Callable[[str], str]
) -> None:
    slug, screen_id = _create_jeu2d_game(client, tmp_game_slug_cleanup)
    background_slug = _a_background_slug()
    background = game_engine.BACKGROUND_LIBRARY[background_slug]

    resp = client.post(
        f"/game/{slug}/screens/{screen_id}/scene-objects/add",
        data={"kind": "fond", "background_slug": background_slug},
        follow_redirects=False,
    )
    assert resp.status_code == 302, resp.data
    obj_id = int(not_none(re.search(r"selected=(\d+)", resp.headers["Location"])).group(1))

    obj = not_none(game_engine.get_scene_object(slug, obj_id))
    assert obj["kind"] == "fond"
    assert obj["width"] == background["width"]
    assert obj["height"] == background["height"]
    assert obj["x"] == 0 and obj["y"] == 0
    assert obj["z_index"] < 0  # toujours derrière un personnage/décor ajouté normalement (z_index >= 1)
    assert obj["attributes"]["src"] == background["url"]


def test_fond_object_renders_as_an_image_with_the_sceneBackground_class(
    client: FlaskClient, tmp_game_slug_cleanup: Callable[[str], str]
) -> None:
    slug, screen_id = _create_jeu2d_game(client, tmp_game_slug_cleanup)
    background_slug = _a_background_slug()
    resp = client.post(
        f"/game/{slug}/screens/{screen_id}/scene-objects/add",
        data={"kind": "fond", "background_slug": background_slug},
        follow_redirects=False,
    )
    obj_id = int(not_none(re.search(r"selected=(\d+)", resp.headers["Location"])).group(1))
    obj = not_none(game_engine.get_scene_object(slug, obj_id))
    html = game_engine.render_scene_object(obj)
    assert 'class="sceneObjectSprite sceneBackground"' in html
    assert f'data-object-id="{obj_id}"' in html


def test_fond_object_falls_back_to_default_size_without_a_known_background_slug(
    client: FlaskClient, tmp_game_slug_cleanup: Callable[[str], str]
) -> None:
    """Un slug invalide/absent (URL bidouillée, script de manifeste jamais
    lancé sur ce poste) : l'objet est quand même créé, à la taille par
    défaut générique (128x128, voir ensure_scene_schema.py) plutôt que de
    planter."""
    slug, screen_id = _create_jeu2d_game(client, tmp_game_slug_cleanup)
    resp = client.post(
        f"/game/{slug}/screens/{screen_id}/scene-objects/add",
        data={"kind": "fond", "background_slug": "ce-slug-nexiste-pas"},
        follow_redirects=False,
    )
    assert resp.status_code == 302
    obj_id = int(not_none(re.search(r"selected=(\d+)", resp.headers["Location"])).group(1))
    obj = not_none(game_engine.get_scene_object(slug, obj_id))
    assert obj["width"] == 128 and obj["height"] == 128


def test_background_gallery_route_rejects_a_non_admin_account(user_game: str, user_client: FlaskClient) -> None:
    resp = user_client.post(
        f"/game/{user_game}/screens/new", data={"name": "Scène", "kind": "jeu_2d"}, follow_redirects=False
    )
    screen_id = int(not_none(re.search(r"/screens/(\d+)/edit", resp.headers["Location"])).group(1))
    background_slug = _a_background_slug()
    resp = user_client.post(
        f"/game/{user_game}/screens/{screen_id}/scene-objects/add",
        data={"kind": "fond", "background_slug": background_slug},
        follow_redirects=False,
    )
    assert resp.status_code == 403


def test_background_gallery_hidden_from_non_admin_scene_editor(user_game: str, user_client: FlaskClient) -> None:
    resp = user_client.post(
        f"/game/{user_game}/screens/new", data={"name": "Scène", "kind": "jeu_2d"}, follow_redirects=False
    )
    screen_id = int(not_none(re.search(r"/screens/(\d+)/edit", resp.headers["Location"])).group(1))
    html = user_client.get(f"/game/{user_game}/screens/{screen_id}/edit").get_data(as_text=True)
    assert "Images de fond" not in html