"""M02 층 집계표 API — `/api/m02/layers/{layer}/…` · 항목 목록 · 항목 복사(PLAN 21-1 · 21-2).

⚠ 등록은 `main.py`(로그인만) · 층 권한은 `M02_Layer_Access`(양식 길 `Router_Layers` 와 한 벌 ·
PLAN 27-1c) · `owner` = 회사 `{C}` · 개인 `{C}/{U}`(없으면 자기 층) · 회사 없음 = 409.
옛 길(`/api/m02/structures/…` 등 · `M02_MasterTemplete_Router.py`)은 시스템 층 별칭으로 그대로.
회사 · 개인 층은 처음 부를 때 빈 뼈대를 만듦(`Items.ensure`).
일위대가 갈라 내기(PLAN 27-2c): 새 조합은 그 층에(마스터 UA · 회사 UC · 개인 UP) · 층 쓰기 권한 ·
첫 진입 뒤 구조물집계표가 이미 있어 같은 이름 새로 쓰기(판 없이)는 409 그대로.
"""

from __future__ import annotations

from pathlib import Path
from typing import Any, Literal

from fastapi import APIRouter, Depends, HTTPException, Query
from pydantic import BaseModel

from common_util.common_util_auth import verify_session
from M02_MasterTemplete import M02_Item_Paste as paste_store
from M02_MasterTemplete import M02_Layer_Access as access
from M02_MasterTemplete import M02_MasterTemplete_Branch as branch
from M02_MasterTemplete import M02_MasterTemplete_Inputs as inputs_store
from M02_MasterTemplete import M02_MasterTemplete_Items as items_store
from M02_MasterTemplete import M02_MasterTemplete_Matset as matset
from M02_MasterTemplete import M02_MasterTemplete_Store as store
from M02_MasterTemplete import M02_MasterTemplete_Tree as tree
from M02_MasterTemplete.M02_MasterTemplete_Router import (
    BranchBody,
    MaterialBranchBody,
    MatsetBody,
    UseComboBody,
)

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

Layer = Literal["system", "company", "personal"]
Session = dict[str, Any]
NO_COMPANY = access.NO_COMPANY


class InputLinksBody(BaseModel):
    판: int | None = None
    줄: list[Any] = []


class TreeBody(BaseModel):
    """26-1 나무 고침 — `{op, 경로, 이름?, 새경로?, 키?, 판}` (+ 항목 더하기 때 `단위?`)."""

    op: str
    경로: list[str] | None = None
    이름: str | None = None
    새경로: list[str] | None = None
    키: str | None = None
    단위: str | None = None
    판: str
    # 여러 개 옮기기 · 지우기(PLAN 30-2) — `[{경로, 키?}]` · 있으면 이것마다 차례로 · 저장 한 번
    대상: list[dict[str, Any]] | None = None


class PasteBody(BaseModel):
    """30-2 층 사이 붙여넣기 — 복사한 층(`from_layer` · `from_owner`) `대상` → 이 층 `경로` 아래."""

    from_layer: Layer
    from_owner: str | None = None
    대상: list[dict[str, Any]]
    경로: list[str] = []


class CopyItemBody(BaseModel):
    from_layer: Literal["system", "company"]
    from_owner: str | None = None
    key: str


def _root(session: Session, layer: str, owner: str | None = None, write: bool = False) -> Path:
    """층 폴더(권한까지 · `M02_Layer_Access`) — 자기 회사 · 개인 층은 없으면 빈 뼈대를 만듦."""
    got = access.require(session, layer, owner, write=write)
    if layer == "system":
        return store.FOLDER
    folder = access.folder(got)
    if got.mine:
        items_store.ensure(folder)
    elif not (folder / "table" / f"{store.STRUCTURE_TABLE}.json").is_file():
        raise HTTPException(status_code=404, detail="그 층은 아직 만든 것이 없음")
    return folder


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


# ── 항목 목록 · 복사 ───────────────────────────────────


def _listing(session: Session, layer: str, owner: str | None) -> dict[str, Any]:
    if layer != "system" and not owner and access.own_owner(session, layer) is None:
        return {"layer": layer, "owner": None, "items": []}  # 회사 없음 = 빈 그룹
    who = access.grant(session, layer, owner).owner
    folder = _root(session, layer, who)
    return {"layer": layer, "owner": who, "items": items_store.items(folder)}


@router.get("/items")
def get_items(
    layer: Layer = "system",
    owner: str | None = None,
    all: bool = False,  # noqa: A002 — 21-1 약속 이름 `?all=1`
    session: Session = Depends(verify_session),
):
    """21-1 — 한 층이면 `[{key, 열, 종류, 분류1~3, 단위, 일위대가, 자재조합, 도번, 면적번,
    재료번}]` ·
    `?all=1` 이면 세 층 `[{layer, owner, items}]`(회사 · 개인은 세션 것 · 회사 없으면 빈 목록)."""
    if all:
        return [_listing(session, one, None) for one in ("system", "company", "personal")]
    return _listing(session, layer, owner)["items"]


@router.post("/layers/personal/items/copy")
def copy_item(body: CopyItemBody, session: Session = Depends(verify_session)) -> dict:
    """회사 · 마스터 항목 → 내 개인 층 새 항목(열 · 세 파일 · 자재 조합 줄 · 새 SS 키 · `본뜬`)."""
    target = _root(session, "personal", None, write=True)
    source = _root(session, body.from_layer, body.from_owner)
    owner = access.grant(session, body.from_layer, body.from_owner).owner
    origin = {"layer": body.from_layer, "owner": owner, "key": body.key}
    try:
        return items_store.copy_item(source, target, body.key, origin)
    except store.StoreError as e:
        raise HTTPException(status_code=e.status, detail=e.detail) from e


# ── 항목 선택 입력(PLAN 25-1b · 25-2a) — 읽기 = 층 읽기 권한(시스템 층 = 로그인 누구나) ──


@router.get("/layers/{layer}/items/{key}/inputs")
def get_item_inputs(
    layer: Layer, key: str, owner: str | None = None, session: Session = Depends(verify_session)
) -> dict:
    """그 항목 일위대가가 담은 로직마다 입력 전부(합치지 않음) · 자동값 — M01 길은 관리자 전용이라
    일반 사용자는 이 길로 읽음."""
    return _call(_root(session, layer, owner), inputs_store.inputs, key)


@router.get("/layers/{layer}/items/{key}/input-links")
def get_input_links(
    layer: Layer, key: str, owner: str | None = None, session: Session = Depends(verify_session)
) -> dict:
    return _call(_root(session, layer, owner), inputs_store.read_links, key)


@router.put("/layers/{layer}/items/{key}/input-links")
def put_input_links(
    layer: Layer,
    key: str,
    body: InputLinksBody,
    owner: str | None = None,
    session: Session = Depends(verify_session),
) -> dict:
    """본문 `{판, 줄}` — 판 다르면 409 · 없는 로직 · 입력 키 422 · 층 쓰기 권한."""
    folder = _root(session, layer, owner, write=True)
    return _call(folder, inputs_store.write_links, key, body.판, body.줄)


@router.get("/layers/{layer}/items/{key}/pills")
def get_item_pills(
    layer: Layer,
    key: str,
    place: Literal["면적", "재료"],
    owner: str | None = None,
    session: Session = Depends(verify_session),
) -> dict:
    """면적산출 · 재료산출 시트 알약 — `{물량: [조합 물량], 입력: [그 시트로 이은 입력]}`."""
    return _call(_root(session, layer, owner), inputs_store.pills, key, place)


# ── 폴더 구조(PLAN 26-1 · 26-2a) — 읽기 = 층 읽기 권한 · 고침 = 층 쓰기 권한 ──


def _tree_view(folder: Path) -> dict[str, Any]:
    """나무 — `{판(집계표), 폴더: [경로 …], items: [항목 …]}` · 폴더 = 빈 폴더 + 항목 앞마디."""
    with store.at(folder):
        got = store.read("table", store.STRUCTURE_TABLE)
    doc = tree.normalize_table(got["문서"])  # 옛 파일도 경로로 읽음
    return {"판": got["판"], "폴더": tree.folders_of(doc), "items": items_store.items(folder)}


@router.get("/layers/{layer}/tree")
def get_tree(layer: Layer, owner: str | None = None, session: Session = Depends(verify_session)):
    folder = _root(session, layer, owner)
    return _call(folder, _tree_view, folder)


def _edit_tree(folder: Path, body: dict[str, Any]) -> dict[str, Any]:
    """집계표를 고쳐 집계표 저장 한 줄기로 — 번호 · SS 장부 · 지운 항목의 세 파일 · 입력 연결."""
    got = store.read("table", store.STRUCTURE_TABLE)
    if got["판"] != body.get("판"):
        raise store.StoreError(409, {"stale": [store.STRUCTURE_TABLE], "판": got["판"]})
    ids = {}  # 키 · 옛 키(회사 · 개인 층 SS) → 열 id
    for r in store.read_combos().get("줄", []):
        for key in [r.get("키"), *(r.get("옛키") or [])]:
            ids[str(key)] = str(r.get("열"))
    try:
        targets = body.get("대상")
        if targets is None:
            doc, note = tree.apply(got["문서"], body, ids)
        else:  # 여러 개 — 차례로 고쳐 저장은 한 번(하나라도 막히면 아무것도 안 씀)
            if body.get("op") not in ("move", "delete") or not targets:
                raise tree.TreeError(422, "여러 개는 옮기기 · 지우기만 — 「대상」 이 필요함")
            doc, note = got["문서"], {"op": body["op"], "지운항목": []}
            for one in paste_store.outer(targets):
                step = {**body, "경로": one.get("경로"), "키": one.get("키")}
                doc, done = tree.apply(doc, step, ids)
                note["지운항목"] += done.get("지운항목", [])
    except tree.TreeError as e:
        raise store.StoreError(e.status, e.detail) from e
    store.write("table", store.STRUCTURE_TABLE, got["판"], doc)
    return {**_tree_view(folder), "알림": note}


@router.post("/layers/{layer}/tree")
def post_tree(
    layer: Layer,
    body: TreeBody,
    owner: str | None = None,
    session: Session = Depends(verify_session),
):
    """폴더 더하기 · 항목 더하기 · 이름 바꾸기 · 옮기기 · 지우기 → 새 나무 · 판 다르면 409.
    쓰이는 항목을 지워도 프로젝트엔 영향 없음(프로젝트는 복사본을 씀 · 알림의 `지운항목`)."""
    folder = _root(session, layer, owner, write=True)
    return _call(folder, _edit_tree, folder, body.model_dump())


@router.post("/layers/{layer}/items/paste")
def post_paste(
    layer: Layer,
    body: PasteBody,
    owner: str | None = None,
    session: Session = Depends(verify_session),
):
    """여러 항목 · 폴더를 층 사이 붙여넣기(PLAN 30-2) — 복사한 층은 읽기 권한 · 이 층은 쓰기 권한 ·
    새 키(SC · SP) · 본뜬 = 원본 · 같은 이름 「이름 (2)」 · 폴더는 안의 것까지 → 새 나무 + 알림."""
    target = _root(session, layer, owner, write=True)
    source = _root(session, body.from_layer, body.from_owner)
    who = access.grant(session, body.from_layer, body.from_owner).owner
    try:
        note = paste_store.paste(
            source, target, body.대상, body.경로, {"layer": body.from_layer, "owner": who}
        )
    except store.StoreError as e:
        raise HTTPException(status_code=e.status, detail=e.detail) from e
    return {**_call(target, _tree_view, target), "알림": note}


# ── 층 길 — 옛 시스템 길과 같은 모양 ─────────────────────


@router.get("/layers/{layer}/structures/numbers")
def get_numbers(layer: Layer, owner: str | None = None, session: Session = Depends(verify_session)):
    return _call(_root(session, layer, owner), store.structure_numbers)


@router.get("/layers/{layer}/structure-combos")
def get_combos(layer: Layer, owner: str | None = None, session: Session = Depends(verify_session)):
    return _call(_root(session, layer, owner), store.read_combos)


@router.post("/layers/{layer}/structures/{column}")
def post_structure(
    layer: Layer, column: str, owner: str | None = None, session: Session = Depends(verify_session)
):
    return _call(_root(session, layer, owner, write=True), store.create_structure, column)


@router.post("/layers/{layer}/structures/{column}/combo")
def post_combo(
    layer: Layer,
    column: str,
    body: BranchBody,
    owner: str | None = None,
    session: Session = Depends(verify_session),
):
    """일위대가 조합 갈라 내기 — 새 조합은 이 층 조합 표에(`Combo_Store`)."""
    folder = _root(session, layer, owner, write=True)
    return _call(
        folder, branch.branch_combo, column, body.본뜬키, body.담은로직, body.이름, body.판
    )


@router.post("/layers/{layer}/structures/{column}/material-combo")
def post_material_combo_branch(
    layer: Layer,
    column: str,
    body: MaterialBranchBody,
    owner: str | None = None,
    session: Session = Depends(verify_session),
):
    folder = _root(session, layer, owner, write=True)
    args = (column, body.본뜬키, body.담은자재, body.이름, body.판)
    return _call(folder, branch.branch_material_combo, *args)


@router.post("/layers/{layer}/structures/{column}/use-combo")
def post_use_combo(
    layer: Layer,
    column: str,
    body: UseComboBody,
    owner: str | None = None,
    session: Session = Depends(verify_session),
):
    folder = _root(session, layer, owner, write=True)
    return _call(folder, branch.use_combo, column, body.종류, body.키, body.판)


@router.post("/layers/{layer}/{kind}/{column}/copy")
def post_copy(
    layer: Layer,
    kind: Literal["structures", "area", "material"],
    column: str,
    source: str = Query(alias="from"),
    owner: str | None = None,
    session: Session = Depends(verify_session),
):
    folder = _root(session, layer, owner, write=True)
    part = "structure" if kind == "structures" else kind
    return _call(folder, store.copy_from, part, column, source)


@router.get("/layers/{layer}/material-combos")
def get_matsets(layer: Layer, owner: str | None = None, session: Session = Depends(verify_session)):
    return _call(_root(session, layer, owner), matset.listing)


@router.get("/layers/{layer}/material-combos/{key}")
def get_matset(
    layer: Layer, key: str, owner: str | None = None, session: Session = Depends(verify_session)
):
    return _call(_root(session, layer, owner), matset.one, key)


@router.post("/layers/{layer}/material-combos")
def post_matset(
    layer: Layer,
    body: MatsetBody,
    owner: str | None = None,
    session: Session = Depends(verify_session),
):
    return _call(_root(session, layer, owner, write=True), matset.create, body.줄, body.판)


@router.put("/layers/{layer}/material-combos/{key}")
def put_matset(
    layer: Layer,
    key: str,
    body: MatsetBody,
    owner: str | None = None,
    session: Session = Depends(verify_session),
):
    return _call(_root(session, layer, owner, write=True), matset.edit, key, body.줄, body.판)


@router.delete("/layers/{layer}/material-combos/{key}")
def delete_matset(
    layer: Layer,
    key: str,
    판: str = "",
    owner: str | None = None,
    session: Session = Depends(verify_session),
):
    return _call(_root(session, layer, owner, write=True), matset.delete, key, 판)