"""Tests for pet slash-command config helpers."""

from __future__ import annotations

import pytest

from agent.pet import store
from agent.pet.constants import FRAME_H, FRAME_W


@pytest.fixture
def boba_installed(tmp_path, monkeypatch):
    from PIL import Image

    home = tmp_path / ".hermes"
    home.mkdir()
    monkeypatch.setenv("HERMES_HOME", str(home))

    sheet = Image.new("RGBA", (FRAME_W * 8, FRAME_H * 9), (0, 0, 0, 0))
    pet_dir = store.pets_dir() / "boba"
    pet_dir.mkdir(parents=True, exist_ok=True)
    sheet.save(pet_dir / "spritesheet.webp")
    (pet_dir / "pet.json").write_text(
        '{"id":"boba","displayName":"Boba","description":"d","spritesheetPath":"spritesheet.webp"}'
    )
    return home


def _write_config(home, *, enabled: bool, slug: str = "") -> None:
    import yaml

    cfg = {"display": {"pet": {"enabled": enabled, "slug": slug, "scale": 0.33}}}
    (home / "config.yaml").write_text(yaml.dump(cfg), encoding="utf-8")


def test_toggle_pet_display_turns_off_when_enabled(boba_installed):
    from hermes_cli.pets import _pet_config, toggle_pet_display

    _write_config(boba_installed, enabled=True, slug="boba")

    enabled, name, err = toggle_pet_display()

    assert err is None
    assert enabled is False
    assert name == "Boba"
    assert _pet_config()["enabled"] is False


def test_toggle_pet_display_turns_on_resolved_pet(boba_installed):
    from hermes_cli.pets import _pet_config, toggle_pet_display

    _write_config(boba_installed, enabled=False, slug="boba")

    enabled, name, err = toggle_pet_display()

    assert err is None
    assert enabled is True
    assert name == "Boba"
    assert _pet_config()["enabled"] is True


def test_toggle_pet_display_errors_with_no_installed_pets(tmp_path, monkeypatch):
    from hermes_cli.pets import toggle_pet_display

    home = tmp_path / ".hermes"
    home.mkdir()
    monkeypatch.setenv("HERMES_HOME", str(home))
    _write_config(home, enabled=False, slug="")

    enabled, name, err = toggle_pet_display()

    assert enabled is False
    assert name is None
    assert err is not None


@pytest.fixture
def empty_home(tmp_path, monkeypatch):
    home = tmp_path / ".hermes"
    home.mkdir()
    monkeypatch.setenv("HERMES_HOME", str(home))
    return home


def test_set_pet_scale_writes_clamped_value(empty_home):
    from agent.pet.constants import MAX_SCALE, MIN_SCALE
    from hermes_cli.pets import _pet_config, set_pet_scale

    applied, err = set_pet_scale("0.5")
    assert err is None
    assert applied == 0.5
    assert _pet_config()["scale"] == 0.5

    # Out-of-range values clamp to the bounds rather than erroring.
    assert set_pet_scale(99) == (MAX_SCALE, None)
    assert set_pet_scale(0) == (MIN_SCALE, None)


def test_set_pet_scale_rejects_non_numbers(empty_home):
    from hermes_cli.pets import set_pet_scale

    applied, err = set_pet_scale("huge")
    assert applied == 0.0
    assert err is not None