"""B09 기성 단계 탭 API — 계약내역 → 기성내역 · 기성 제잡비 계산서 (PLAN 12장 · 랩탑 메인).

⚠ 계약내역(`contract_for`)과 계약 원가계산서(`cost_from_bill` 에 계약 직접비)를 **읽기만** 한다.
  저장은 `estimation.progress` 한 칸(회차 목록) — 설계·계약·원가계산서 저장본은 안 건드린다.
"""

from __future__ import annotations

import logging
from decimal import Decimal
from typing import Any
from uuid import UUID

from fastapi import APIRouter
from fastapi.responses import JSONResponse

from B09_Estimation.B09_Estimation_Progress import (
    CUT_CHOICES,
    SETTINGS_KEY,
    VAT_CHOICES,
    clean_settings,
    completion_sheet,
    progress_sheet,
)
from B09_Estimation.B09_Estimation_Rates import RateLookupError

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


def _cut_options(first: str) -> list[dict[str, str]]:
    """절사 9택 — 첫 칸은 화면 표기 그대로(빈 값)."""
    return [
        {"key": unit, "label": f"{int(unit):,}원 미만" if unit else first} for unit in CUT_CHOICES
    ]


async def progress_for(
    project_id: UUID, round: int | None
) -> tuple[dict[str, Any], dict[str, Any]] | JSONResponse:
    """(기성 저장값, 기성 한 장) — 못 서면 그 까닭 응답. 준공도 이 길로 기성본을 받음."""
    from B09_Estimation.B09_Estimation_Router_Contract import contract_for
    from B09_Estimation.B09_Estimation_Router_CostSheet import cost_from_bill
    from common_util.common_util_project_settings import estimation_settings

    found = await contract_for(project_id)
    if isinstance(found, JSONResponse):
        return found
    root, bill, _, contract = found
    totals = contract["totals"]["contract"]
    direct = {part: Decimal(totals[f"{part}_krw"]) for part in ("material", "labor", "expense")}
    try:
        cost_data, cost_result, _ = cost_from_bill(root, bill, direct)
    except RateLookupError as error:
        return JSONResponse(status_code=422, content={"status": "error", "message": str(error)})
    stored, _ = clean_settings(dict(estimation_settings(root).get(SETTINGS_KEY) or {}))
    return stored, progress_sheet(contract["rows"], cost_data, cost_result, stored, round)


@router.get("/{project_id}/estimation/completion")
async def get_completion(project_id: UUID) -> JSONResponse:
    """준공 한 장 — 계약금액 | 준공금액(기성 마지막 회차 누계를 옮김)."""
    found = await progress_for(project_id, None)
    if isinstance(found, JSONResponse):
        return found
    return JSONResponse(
        content={
            "status": "success",
            **completion_sheet(found[1]),
            "limit_note": (
                "준공 별도 계산 규칙 미확인(35번 §3) — 기성 마지막 회차 누계를 옮기기만 함 · "
                "준공 표본 0건"
            ),
        }
    )


@router.get("/{project_id}/estimation/progress")
async def get_progress(project_id: UUID, round: int | None = None) -> JSONResponse:
    """기성 한 장 — `round` 회차(1부터)를 금회로 · 없으면 마지막 회차."""
    found = await progress_for(project_id, round)
    if isinstance(found, JSONResponse):
        return found
    stored, sheet = found
    return JSONResponse(
        content={
            "status": "success",
            **sheet,
            "settings": stored,
            "fields": {
                "vat": [{"key": k, "label": label} for k, label in VAT_CHOICES],
                "supply_cut": _cut_options("총공사비에서 조정"),
                "total_cut": _cut_options("이윤금액 직접입력"),
            },
            "limit_note": (
                "기성 표본 0건 — 구조가 서는지까지만 확인됨 · 계약잡비율 역산(도급액 ÷ 계약 "
                "직접공사비)·회차별 절사는 구조로 읽음 · 사정은 뜻 미확인이라 칸만"
            ),
        }
    )


@router.put("/{project_id}/estimation/progress")
async def put_progress(project_id: UUID, body: dict[str, Any]) -> JSONResponse:
    """회차 목록 저장 — 틀린 칸이 있으면 아무것도 안 저장."""
    from B09_Estimation.B09_Estimation_Router import _project_root_of
    from common_util.common_util_project_settings import save_section

    root = await _project_root_of(project_id)
    if root is None:
        return JSONResponse(
            status_code=404,
            content={"status": "error", "message": "프로젝트 저장 폴더를 찾지 못했습니다."},
        )
    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 기성 저장 실패: project_id=%s", project_id)
        return JSONResponse(
            status_code=500,
            content={"status": "error", "message": "기성 회차를 저장하지 못했습니다."},
        )
    return JSONResponse(content={"status": "success", "settings": cleaned})