"""
===============================================================================
FILE: services/prompts/service.py
PROJECT: SCUD Orion AI (Unified Architecture)
MODULE: services / prompts
ROLE: Единый доменный сервис управления системным промптом.
===============================================================================
"""

from typing import Tuple, Dict, Any
from .repository import repo_get_active_prompt, repo_apply_prompt_action, repo_save_full_prompt
from .diff_engine import build_prompt_diff


def get_active_system_prompt() -> str:
    """Получить текущий активный системный промпт."""
    return repo_get_active_prompt()


def apply_prompt_action(action: str, section_id: int, item_id: int, content: str = "") -> None:
    """Применить точечное изменение к узлу промпта."""
    repo_apply_prompt_action(action, section_id, item_id, content)


def save_full_prompt_draft(draft_text: str) -> None:
    """Сохранить полный черновик промпта."""
    repo_save_full_prompt(draft_text)


def create_prompt_preview(action: str, section_id: int, item_id: int, content: str = "") -> Tuple[str, str, str]:
    """
    Формирует черновик и diff.
    Возвращает (merged_draft, diff_html, baseline_prompt).
    """
    baseline = repo_get_active_prompt()
    draft, diff_html = build_prompt_diff(action, section_id, item_id, content)
    return draft, diff_html, baseline