"""B09 실행예산 단계 탭 API — 설계 내역 → 실행예산 (PLAN 12장 · 랩탑 메인).

⚠ 설계 내역·단가표를 **읽기만** 한다(복사본에 중기 실행단가·실행수량을 얹음). 저장은
  `estimation.execution` 한 칸 — 설계 내역·계약·원가계산서 저장본은 안 건드린다.
"""

from __future__ import annotations

import json
import logging
from typing import Any
from uuid import UUID

from fastapi import APIRouter
from fastapi.responses import JSONResponse

from B09_Estimation.B09_Estimation_Execution import (
    CORRECTION_HINTS,
    CORRECTIONS,
    CUT_UNITS,
    SETTINGS_KEY,
    clean_settings,
    execution_bill,
)

logger = logging.getLogger(__name__)
router = APIRouter(prefix="/api/projects", tags=["B09 Estimation — Execution"])

_NOT_FOUND = {"status": "error", "message": "프로젝트 저장 폴더를 찾지 못했습니다."}


async def _root(project_id: UUID) -> str | None:
    from B09_Estimation.B09_Estimation_Router import _project_root_of

    return await _project_root_of(project_id)


@router.get("/{project_id}/estimation/execution")
async def get_execution(project_id: UUID) -> JSONResponse:
    """실행예산 한 장 — 설계 줄 옆에 실행수량·실행단가·실행금액 · 중기 실행단가 표 · 합계."""
    from B09_Estimation.B09_Estimation_Router import _build_for, get_bill
    from common_util.common_util_project_settings import estimation_settings

    root = await _root(project_id)
    if root is None:
        return JSONResponse(status_code=404, content=_NOT_FOUND)
    response = await get_bill(project_id)
    bill = json.loads(bytes(response.body).decode("utf-8"))
    if response.status_code != 200 or "rows" not in bill:
        return JSONResponse(status_code=response.status_code or 502, content=bill)
    stored, _ = clean_settings(dict(estimation_settings(root).get(SETTINGS_KEY) or {}))
    # 조립본은 캐시 공유본 — `execution_bill` 이 단가표 복사본에만 중기 실행단가를 얹음(설계 불변).
    result = execution_bill(bill["rows"], stored, build=await _build_for(project_id))
    return JSONResponse(
        content={
            "status": "success",
            **result,
            "settings": stored,
            "fields": {
                "cut_units": list(CUT_UNITS),
                "corrections": [
                    {"key": k, "label": label, "hint": CORRECTION_HINTS[k]}
                    for k, label in CORRECTIONS
                ],
            },
            "bill_missing_count": len((bill.get("summary") or {}).get("missing") or []),
            "limit_note": (
                "실행예산 표본 0건 — 구조가 서는지까지만 확인됨 · 성분 가르기·기본보정은 확인 대기"
            ),
        }
    )


@router.put("/{project_id}/estimation/execution")
async def put_execution(project_id: UUID, body: dict[str, Any]) -> JSONResponse:
    """중기 실행단가 입력·실행수량 저장 — 틀린 칸이 있으면 아무것도 안 저장."""
    from common_util.common_util_project_settings import save_section

    root = await _root(project_id)
    if root is None:
        return JSONResponse(status_code=404, content=_NOT_FOUND)
    cleaned, errors = clean_settings(body)
    if errors:
        return JSONResponse(
            status_code=400,
            content={"status": "error", "message": " · ".join(errors), "errors": errors},
        )
    try:
        save_section(root, "estimation", {SETTINGS_KEY: cleaned}, replace_keys=(SETTINGS_KEY,))
    except Exception:
        logger.exception("B09 실행예산 저장 실패: project_id=%s", project_id)
        return JSONResponse(
            status_code=500,
            content={"status": "error", "message": "실행예산을 저장하지 못했습니다."},
        )
    return JSONResponse(content={"status": "success", "settings": cleaned})