"""Warm evening / chill breathing animation."""

from __future__ import annotations

import colorsys
import math

from .base import Animation


class ChillAnimation(Animation):
    name = "chill"
    interval = 0.12

    # Warm hues (0–1 range for colorsys)
    COLORS = [
        (15 / 360, 1.0),   # warm red-orange
        (25 / 360, 0.95),  # orange
        (35 / 360, 0.90),  # amber
        (45 / 360, 0.85),  # golden
        (30 / 360, 1.0),   # deep orange
        (10 / 360, 1.0),   # deep red
    ]

    def on_start(self) -> None:
        super().on_start()
        self._phase = 0.0
        self._color_idx = 0

    def tick(self) -> None:
        self._phase += 0.08
        brightness = 40 + math.sin(self._phase) * 18  # ~22–58
        brightness = max(20, min(70, brightness))

        if self._phase >= math.pi * 2:
            self._phase = 0.0
            self._color_idx = (self._color_idx + 1) % len(self.COLORS)

        h, s = self.COLORS[self._color_idx]
        r, g, b = colorsys.hsv_to_rgb(h, s, 1.0)
        gain = int(brightness)

        self.shelly.set_color(
            int(r * 255),
            int(g * 255),
            int(b * 255),
            gain=gain,
        )