from __future__ import annotations
from dataclasses import dataclass
import numpy as np

from entities.rgb_image512 import RgbImage512
from entities.ycbcr_image512 import YcbcrImage512
from entities.label64 import Label64
from entities.sequence8 import Sequence8

from .embedder import Embedder
from .extractor import Extractor


@dataclass(frozen=True)
class ComponentPipeline:
    """Оркестрация встраивания/извлечения в заданный канал Y/Cb/Cr."""

    channel: str  # "Y", "Cb", "Cr"
    embedder: Embedder
    extractor: Extractor

    def embed_rgb(self, rgb: RgbImage512, label: Label64, seq: Sequence8) -> RgbImage512:
        """Вернуть новый RGB с вшитой меткой в выбранный канал."""
        ycbcr = YcbcrImage512.from_rgb(rgb)
        comp = ycbcr.get_channel(self.channel)
        comp_new = self.embedder.embed_component(comp, label, seq)
        ycbcr_new = ycbcr.with_channel(self.channel, comp_new)
        return ycbcr_new.to_rgb()

    def extract_from_rgb(self, rgb: RgbImage512, seq: Sequence8) -> Label64:
        """Извлечь метку из выбранного канала RGB-изображения."""
        ycbcr = YcbcrImage512.from_rgb(rgb)
        comp = ycbcr.get_channel(self.channel)
        return self.extractor.extract_label(comp, seq)