"""M02 마스터 템플릿 API — 시스템 층(계약 `6_계약.md` 서버 길 첫 묶음).

⚠ 권한은 등록하는 쪽(`main.py`)이 `system_admin_only` 로 붙임.
"""

from __future__ import annotations

import json
from pathlib import Path
from typing import Any

from fastapi import APIRouter, HTTPException
from pydantic import BaseModel

from common_util import common_util_spreadsheet as spreadsheet
from common_util.common_util_json import atomic_write_json
from M02_MasterTemplete import M02_MasterTemplete_Store as store

router = APIRouter(prefix="/api/m02", tags=["M02 MasterTemplete"])


class SaveBody(BaseModel):
    판: str = ""
    문서: Any


def _call(fn, *args):
    try:
        return fn(*args)
    except store.StoreError as e:
        raise HTTPException(status_code=e.status, detail=e.detail) from e


@router.get("/templates")
def get_templates() -> list[dict]:
    return _call(store.list_all)


@router.get("/structures/numbers")
def get_structure_numbers() -> dict:
    return _call(store.structure_numbers)


@router.post("/structures/{column}")
def post_structure(column: str) -> dict:
    """구조물 도면 새로 — 열 id 하나 · 도번 자동 · A1 도각 + 빈 산출근거 표 · 이미 있으면 409."""
    return _call(store.create_structure, column)


@router.get("/templates/{kind}/{name}")
def get_template(kind: str, name: str) -> dict:
    return _call(store.read, kind, name)


@router.put("/templates/{kind}/{name}")
def put_template(kind: str, name: str, body: SaveBody) -> dict:
    return _call(store.write, kind, name, body.판, body.문서)


@router.delete("/templates/{kind}/{name}")
def delete_template(kind: str, name: str, 판: str | None = None) -> dict:
    _call(store.delete, kind, name, 판)
    return {"ok": True}


# ── ⚠ 임시(스프레드시트 시험 단추 · 사용자 지시 · 1단계 검증 뒤 지움) ──────────
# 저장 자리 = `tmp/spreadsheet_trial.json`(git 밖) · 없으면 시트 셋 빈 통합문서.
TRIAL_PATH = Path(__file__).resolve().parent.parent / "tmp" / "spreadsheet_trial.json"


def _trial_doc() -> dict[str, Any]:
    sheets = [{"id": f"s{i}", "이름": f"시트{i}", "칸": {}} for i in (1, 2, 3)]
    return {"종류": "통합문서", "판": 1, "열": "시험", "서식": [{}], "시트": sheets, "활성": "s1"}


@router.get("/spreadsheet-trial")
def get_spreadsheet_trial() -> dict:
    if not TRIAL_PATH.is_file():
        return {"문서": _trial_doc()}
    return {"문서": json.loads(TRIAL_PATH.read_text(encoding="utf-8"))}


class TrialBody(BaseModel):
    문서: dict[str, Any]


@router.put("/spreadsheet-trial")
def put_spreadsheet_trial(body: TrialBody) -> dict:
    try:
        doc = spreadsheet.with_server_values(body.문서)
    except spreadsheet.RecalcError as e:
        raise HTTPException(status_code=503, detail=str(e)) from e
    atomic_write_json(TRIAL_PATH, doc)
    return {"문서": doc}