# -*- coding: utf-8 -*-
"""
Statische LED-Animationen (einmalig, CONTINUOUS = False).

Enthaelt einfache Animationen wie Solid, Blink-Varianten, Flash
und sequentielles Fuellen.
"""

from __future__ import annotations

from collections.abc import Iterator

from trixy_core.led.animations import IAnimation, RGB
from trixy_core.led.layouts import LEDLayout

# Schwarz / aus
OFF: RGB = (0, 0, 0)


class SolidAnimation(IAnimation):
    """Alle LEDs auf eine Farbe setzen (1 Frame).

    Bei Jewel-Layouts wird die Center-LED optional mit einer
    separaten Farbe (center_color) angesteuert.
    """

    NAME = "solid"
    CONTINUOUS = False

    def frames(
        self,
        led_count: int,
        color: RGB,
        speed: int,
        layout: LEDLayout,
        **opts: object,
    ) -> Iterator[list[RGB]]:
        center_color: RGB | None = opts.get("center_color")  # type: ignore[assignment]

        frame = [color] * led_count

        # Jewel: Center-LED separat einfaerben
        if layout.center_index is not None and center_color is not None:
            frame[layout.center_index] = center_color

        yield frame


class SingleBlinkAnimation(IAnimation):
    """Einmaliges Blinken: an → aus."""

    NAME = "single-blink"
    CONTINUOUS = False

    def frames(
        self,
        led_count: int,
        color: RGB,
        speed: int,
        layout: LEDLayout,
        **opts: object,
    ) -> Iterator[list[RGB]]:
        yield from _blink_frames(led_count, color, layout, 1, **opts)


class DoubleBlinkAnimation(IAnimation):
    """Zweimaliges Blinken: an/aus/an/aus."""

    NAME = "double-blink"
    CONTINUOUS = False

    def frames(
        self,
        led_count: int,
        color: RGB,
        speed: int,
        layout: LEDLayout,
        **opts: object,
    ) -> Iterator[list[RGB]]:
        yield from _blink_frames(led_count, color, layout, 2, **opts)


class TripleBlinkAnimation(IAnimation):
    """Dreimaliges Blinken: an/aus/an/aus/an/aus."""

    NAME = "triple-blink"
    CONTINUOUS = False

    def frames(
        self,
        led_count: int,
        color: RGB,
        speed: int,
        layout: LEDLayout,
        **opts: object,
    ) -> Iterator[list[RGB]]:
        yield from _blink_frames(led_count, color, layout, 3, **opts)


class FlashAnimation(IAnimation):
    """Kurzer heller Blitz (50 ms an, dann aus).

    Aehnlich wie Blink, aber nur ein einzelner schneller Frame.
    Die Engine verwendet speed=50 fuer den an-Frame.
    """

    NAME = "flash"
    CONTINUOUS = False

    def frames(
        self,
        led_count: int,
        color: RGB,
        speed: int,
        layout: LEDLayout,
        **opts: object,
    ) -> Iterator[list[RGB]]:
        # Heller Frame — volle Helligkeit
        on_frame = [color] * led_count
        off_frame = [OFF] * led_count

        yield on_frame
        yield off_frame


class FillSequentialAnimation(IAnimation):
    """LEDs schalten nacheinander ein (Ring-Reihenfolge).

    Bei Jewel: Ring-LEDs zuerst, Center-LED zuletzt.
    Jeder Frame fuegt eine weitere LED hinzu.
    """

    NAME = "fill-sequential"
    CONTINUOUS = False

    def frames(
        self,
        led_count: int,
        color: RGB,
        speed: int,
        layout: LEDLayout,
        **opts: object,
    ) -> Iterator[list[RGB]]:
        center_color: RGB | None = opts.get("center_color")  # type: ignore[assignment]

        # Reihenfolge: Ring-LEDs zuerst, dann Center (falls vorhanden)
        fill_order: list[int] = list(layout.ring_indices)
        if layout.center_index is not None:
            fill_order.append(layout.center_index)

        frame = [OFF] * led_count

        for idx in fill_order:
            # Center-LED bekommt eigene Farbe wenn angegeben
            if idx == layout.center_index and center_color is not None:
                frame[idx] = center_color
            else:
                frame[idx] = color

            # Kopie yielden, damit spaetere Aenderungen den Frame nicht
            # nachtraeglich veraendern
            yield list(frame)


# ── Hilfsfunktionen ──────────────────────────────────────────────────────


def _blink_frames(
    led_count: int,
    color: RGB,
    layout: LEDLayout,
    count: int,
    **opts: object,
) -> Iterator[list[RGB]]:
    """Erzeugt Blink-Frames (an/aus) fuer die angegebene Anzahl.

    Args:
        led_count: Gesamtanzahl LEDs.
        color: Primaerfarbe.
        layout: LED-Layout.
        count: Anzahl Blink-Zyklen.
        **opts: Zusaetzliche Optionen (center_color).

    Yields:
        Abwechselnd an- und aus-Frames.
    """
    center_color: RGB | None = opts.get("center_color")  # type: ignore[assignment]

    on_frame = [color] * led_count
    if layout.center_index is not None and center_color is not None:
        on_frame[layout.center_index] = center_color

    off_frame = [OFF] * led_count

    for _ in range(count):
        yield list(on_frame)
        yield list(off_frame)


def get_animations() -> list[type[IAnimation]]:
    """Gibt alle statischen Animationsklassen zurueck."""
    return [
        SolidAnimation,
        SingleBlinkAnimation,
        DoubleBlinkAnimation,
        TripleBlinkAnimation,
        FlashAnimation,
        FillSequentialAnimation,
    ]