"""
===============================================================================
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, List, Optional
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, prompt_name: str = "main_agent") -> None:
    """Сохранить полный черновик промпта."""
    repo_save_full_prompt(draft_text, prompt_name=prompt_name)


def create_prompt_preview(
    action: str, 
    section_id: Optional[int] = None, 
    item_id: Optional[int] = None, 
    content: str = "",
    delete_nodes: Optional[List[Tuple[int, int]]] = None
) -> 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=action, 
        section_id=section_id, 
        item_id=item_id, 
        content=content,
        delete_nodes=delete_nodes
    )
    return draft, diff_html, baseline