"""Contracts between the application layer and infrastructure adapters."""

from __future__ import annotations

from dataclasses import dataclass
from typing import Protocol

from src.app.domain.models import HealthStatus, Note, NoteDraft


class HealthStatusProvider(Protocol):
    """Protocol describing how to obtain the current health status."""

    def get_status(self) -> HealthStatus:
        """Return the latest domain health status snapshot."""
        ...


class NoteRepository(Protocol):
    """Protocol for managing example notes."""

    def create(self, draft: NoteDraft) -> Note:
        """Persist a note draft and return the resulting entity."""
        ...

    def list(self) -> list[Note]:
        """Return all available notes."""
        ...

    def get(self, note_id: int) -> Note | None:
        """Return a single note or None if it does not exist."""
        ...


@dataclass(slots=True)
class ServiceContext:
    """Aggregates infrastructure adapters used by application use-cases."""

    health_provider: HealthStatusProvider
    note_repository: NoteRepository


__all__ = ["HealthStatusProvider", "NoteRepository", "ServiceContext"]