"""B09 원가계산 라우터 — **사용자가 고친 값** 읽기·저장 (PLAN 12장 2차 · `B09_Estimation_Edits`).

⚠ `B09_Estimation_Router.py` 는 쪼개기 차례를 기다리는 중이라(브레인 판정) 새 문을 여기 둠.
⚠ 저장은 고친 값만 — 금액은 다음 조회 때 서버가 조립 뒤 고친 값을 얹어 **다시 계산**함.
"""

from __future__ import annotations

import logging
from typing import Any
from uuid import UUID

from fastapi import APIRouter
from fastapi.responses import JSONResponse
from pydantic import BaseModel, Field

from B09_Estimation.B09_Estimation_Edits import (
    EDITS_KEY,
    EditError,
    merge_changes,
    normalize,
)

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


class EditChange(BaseModel):
    """고칠 칸 하나 — `value` 가 `null` 이면 그 칸을 지움(↺ 계산값으로 돌아감)."""

    section: str
    key: str
    value: Any = None


class EditRequest(BaseModel):
    changes: list[EditChange] = Field(default_factory=list)


@router.get("/{project_id}/estimation/edits")
async def get_edits(project_id: UUID) -> JSONResponse:
    """고친 값 한 벌 — 화면이 「사용자」 표시·↺ 를 붙이는 데 씀."""
    from B09_Estimation.B09_Estimation_Router import _build_for, _project_root_of
    from common_util.common_util_project_settings import estimation_settings

    root = await _project_root_of(project_id)
    settings = estimation_settings(root) if root else {}
    build = await _build_for(project_id)
    return JSONResponse(
        content={
            "status": "success",
            EDITS_KEY: normalize(settings.get(EDITS_KEY)),
            "skipped": list(getattr(build, "edit_skipped", [])),
        }
    )


@router.get("/{project_id}/estimation/edits/sheet/{code}")
async def get_edit_sheet(project_id: UUID, code: str) -> JSONResponse:
    """호표 본표 + 줄마다 고친 값 표시(`edit`) — 일위대가·단산 구성행 수정·Q 식 편집 화면이 씀.

    본표 모양은 `/unit-prices/{code}` 와 같음(`detail_of`) — 줄 차례가 상세 줄 차례와 같아 칸이 맞음.
    """
    from B09_Estimation.B09_Estimation_Edits import EDITABLE_KINDS, row_edits
    from B09_Estimation.B09_Estimation_PriceBook import PriceBookError
    from B09_Estimation.B09_Estimation_Router import _build_for, _with_provenance
    from B09_Estimation.B09_Estimation_UnitPrice import detail_of

    try:
        build = await _build_for(project_id)
        body = detail_of(build, code)
    except PriceBookError as error:
        return JSONResponse(status_code=404, content={"status": "error", "message": str(error)})
    except Exception:
        logger.exception("B09 편집 본표 실패: project_id=%s, code=%s", project_id, code)
        return JSONResponse(
            status_code=500,
            content={"status": "error", "message": "본표를 못 만들었습니다."},
        )
    for row, edit in zip(body["rows"], row_edits(build, code)):
        row["edit"] = edit
    added = [
        int(mark["key"].rsplit("|+", 1)[1])
        for mark in getattr(build, "edit_rows", {}).get(code, {}).values()
        if "|+" in str(mark.get("key", ""))
    ]
    body["editable"] = build.book.title(code).kind in EDITABLE_KINDS
    body["next_add_key"] = f"{code}|+{max(added, default=0) + 1}"
    return JSONResponse(content=_with_provenance({"status": "success", **body}))


@router.get("/{project_id}/estimation/edits/search")
async def search_titles(project_id: UUID, q: str = "", parent: str = "") -> JSONResponse:
    """줄 더하기 고르개 — 단가표 제목을 이름·규격으로 찾음(노임·자재·중기·일위대가·단산·일식)."""
    from B09_Estimation.B09_Estimation_Edits import ADDABLE_KINDS
    from B09_Estimation.B09_Estimation_Router import _build_for
    from B09_Estimation.B09_Estimation_UnitPrice import HOURLY_WAGE_SUFFIX, SOURCE_LABEL

    words = [word for word in q.lower().split() if word]
    build = await _build_for(project_id)
    rows = []
    for code, title in build.book.titles.items():
        if title.kind not in ADDABLE_KINDS or code == parent or code.endswith(HOURLY_WAGE_SUFFIX):
            continue
        text = f"{title.name} {title.spec} {code}".lower()
        if words and all(word in text for word in words):
            rows.append(
                {
                    "code": code,
                    "name": title.name,
                    "spec": title.spec,
                    "unit": title.unit,
                    "kind_label": SOURCE_LABEL.get(title.kind, ""),
                }
            )
        if len(rows) >= 40:
            break
    return JSONResponse(content={"status": "success", "rows": rows})


@router.put("/{project_id}/estimation/edits")
async def put_edits(project_id: UUID, payload: EditRequest) -> JSONResponse:
    """고친 값 저장 — 칸마다 검사하고(값 없는 슬롯 등은 받지 않음) 구획째 갈아 끼움."""
    from B09_Estimation.B09_Estimation_Router import _build_for, _project_root_of
    from common_util.common_util_project_settings import estimation_settings, 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."},
        )
    settings = estimation_settings(root)
    try:
        build = await _build_for(project_id)
        edits = merge_changes(
            settings.get(EDITS_KEY), build, [change.model_dump() for change in payload.changes]
        )
    except EditError as error:
        return JSONResponse(status_code=422, content={"status": "error", "message": str(error)})
    try:
        save_section(root, "estimation", {EDITS_KEY: edits}, replace_keys=(EDITS_KEY,))
    except Exception:
        logger.exception("B09 고친 값 저장 실패: project_id=%s", project_id)
        return JSONResponse(
            status_code=500,
            content={"status": "error", "message": "고친 값을 저장하지 못했습니다."},
        )
    return JSONResponse(content={"status": "success", EDITS_KEY: edits})