"""The classroom stylesheet, resolved at the room's UI scale.

The dock and the DVD control bar share this so they cannot drift apart:
one template, one set of measurements, one look.
"""

from pathlib import Path

from classroom_config import scaled

TEMPLATE = Path("/etc/ekklesia-classroom/overlay/style.css.in")

# Every measurement in the template, at UI_SCALE=1.0.
MEASUREMENTS = {
    "dock-radius": 24,
    "dock-padding-v": 8,
    "dock-padding-h": 10,
    "button-radius": 16,
    "button-padding": 6,
    "button-size": 44,
    "button-spinner": 38,
    "clock-radius": 16,
    "clock-padding-v": 7,
    "clock-padding-h": 12,
    "clock-font": 17,
}


def render(scale, template=None):
    """Resolve the measurement tokens in the stylesheet template."""
    css = (template or TEMPLATE).read_text()

    for token, value in MEASUREMENTS.items():
        css = css.replace(f"@{token}@", str(scaled(value, scale)))

    return css