"""말레이시아 창고 재고관리 모듈 라우터.

- 경로: /malaysia
- 권한: 로그인 + `malaysia` 모듈 권한 (관리자는 항상 통과). 서버 측 검사.
- 데이터: MalaysiaStockStore (malaysia_stock_db / PostgreSQL) 전용.
  MALAYSIA_STOCK_DB_URL 미설정 시 store 가 None 이며, 각 페이지는 "설정 필요" 안내.
- 세트 BOM: itemcode_db(set_components) 읽기 전용(MalaysiaItemcodeReader). 별도 관리 메뉴 없음.

입력 방식: 입출고/재고조사 모두 전체 아이템(+세트) 그리드에 수량만 키인 → 일괄 등록.
"""

from __future__ import annotations

from typing import Any

from fastapi import APIRouter, Body, Depends, Form, HTTPException, Request
from fastapi.responses import HTMLResponse, JSONResponse, RedirectResponse

from app.timezone import today_kst

from . import store

router = APIRouter(prefix="/malaysia", tags=["malaysia"])


# ────────────────────────────────────────────────────────────
# 공용 헬퍼
# ────────────────────────────────────────────────────────────
def _store(request: Request) -> Any:
    return getattr(request.app.state, "malaysia_store", None)


def _reader(request: Request) -> Any:
    return getattr(request.app.state, "malaysia_itemcode", None)


def _bom_map(request: Request) -> dict[str, list[dict[str, Any]]]:
    """itemcode_db(set_components)에서 MY- 세트 BOM 을 읽어 반환. 리더 없으면 {}."""
    r = _reader(request)
    return r.set_bom_map() if r else {}


def _require_user(request: Request) -> dict[str, Any]:
    from app.main import get_current_user_record  # noqa: WPS433
    from app.store import has_module  # noqa: WPS433

    user = get_current_user_record(request)
    if user is None:
        raise HTTPException(status_code=401, detail="로그인이 필요합니다.")
    if not has_module(user, "malaysia"):
        raise HTTPException(status_code=403, detail="말레이시아 재고관리 모듈 권한이 없습니다.")
    return user


def _render_config_needed(request: Request, user: dict[str, Any]) -> HTMLResponse:
    from app.main import build_erp_nav, render_template  # noqa: WPS433
    from app.store import is_admin  # noqa: WPS433

    return render_template(
        request,
        "denied.html",
        {
            "reason": "말레이시아 재고관리 모듈이 아직 설정되지 않았습니다. "
            "MALAYSIA_STOCK_DB_URL 환경변수를 설정하고 "
            "scripts/sql/malaysia_stock_db_init.sql 로 malaysia_stock_db 를 "
            "초기화한 뒤 컨테이너를 재기동하세요.",
            "user": user,
            "is_admin": is_admin(user),
            "nav_items": build_erp_nav(user, active="malaysia"),
        },
        status_code=503,
    )


def _guard(request: Request) -> tuple[Any, dict[str, Any]] | HTMLResponse | RedirectResponse:
    """로그인+권한+store 점검. 페이지 핸들러 진입부에서 사용."""
    from app.main import get_current_user_record, render_template  # noqa: WPS433
    from app.store import has_module, is_admin  # noqa: WPS433

    user = get_current_user_record(request)
    if user is None:
        return RedirectResponse(url="/login", status_code=303)
    if not has_module(user, "malaysia"):
        return render_template(
            request,
            "denied.html",
            {"reason": "말레이시아 재고관리 모듈 접근 권한이 없습니다.", "is_admin": is_admin(user)},
            status_code=403,
        )
    st = _store(request)
    if st is None:
        return _render_config_needed(request, user)
    return st, user


def _selected_wh(request: Request, st: Any) -> str:
    """쿼리 ?wh= 또는 기본(첫 활성 창고)."""
    wh = (request.query_params.get("wh") or "").strip()
    codes = [w["warehouse_code"] for w in st.list_warehouses()]
    if wh in codes:
        return wh
    return codes[0] if codes else "MY-WH-01"


def _base_ctx(request: Request, user: dict[str, Any], st: Any, *, wh: str) -> dict[str, Any]:
    from app.main import build_erp_nav  # noqa: WPS433
    from app.store import is_admin  # noqa: WPS433

    return {
        "user": user,
        "is_admin": is_admin(user),
        "nav_items": build_erp_nav(user, active="malaysia"),
        "warehouses": st.list_warehouses(),
        "selected_wh": wh,
    }


# ════════════════════════════════════════════════════════════
# 재고 현황 (메인)
# ════════════════════════════════════════════════════════════
@router.get("/", response_class=HTMLResponse)
async def index(request: Request) -> HTMLResponse:
    from app.main import render_template  # noqa: WPS433

    guard = _guard(request)
    if not isinstance(guard, tuple):
        return guard
    st, user = guard
    wh = _selected_wh(request, st)
    ctx = _base_ctx(request, user, st, wh=wh)
    ctx.update(
        {
            "page_title": "말레이시아 재고관리",
            "page_subtitle": f"{wh} · 재고 현황",
            "rows": st.stock_status(warehouse_code=wh),
        }
    )
    return render_template(request, "malaysia/index.html", ctx)


# ════════════════════════════════════════════════════════════
# 입고 / 출고 등록 (그리드 일괄)
# ════════════════════════════════════════════════════════════
@router.get("/movements", response_class=HTMLResponse)
async def movements_page(request: Request) -> HTMLResponse:
    from app.main import render_template  # noqa: WPS433

    guard = _guard(request)
    if not isinstance(guard, tuple):
        return guard
    st, user = guard
    wh = _selected_wh(request, st)
    mtype = (request.query_params.get("type") or "").strip().upper()
    ctx = _base_ctx(request, user, st, wh=wh)
    ctx.update(
        {
            "page_title": "말레이시아 재고관리 — 입출고",
            "page_subtitle": f"{wh} · 입고/출고/조정 일괄 등록",
            "individual_items": st.list_items(kind="individual"),
            "set_items": st.list_items(kind="set"),
            "movements": st.list_movements(
                warehouse_code=wh,
                movement_type=mtype if mtype in store.MOVEMENT_TYPES else None,
                limit=200,
            ),
            "today": today_kst().isoformat(),
            "filter_type": mtype if mtype in store.MOVEMENT_TYPES else "",
        }
    )
    return render_template(request, "malaysia/movements.html", ctx)


@router.post("/movements/bulk")
async def movements_bulk(request: Request, user: dict[str, Any] = Depends(_require_user)) -> RedirectResponse:
    """낱개 아이템 그리드 일괄 등록. form: movement_type, movement_date,
    warehouse_code, ref_type, ref_no, memo, qty_<ITEMCODE>...

    IN/OUT 은 양수만 등록(0/빈칸 스킵), ADJUST 는 0 아닌 값만 등록(±).
    """
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    form = await request.form()
    mtype = str(form.get("movement_type") or "").strip().upper()
    if mtype not in ("IN", "OUT", "ADJUST"):
        raise HTTPException(status_code=400, detail="이동 종류 오류")
    wh = str(form.get("warehouse_code") or "").strip()
    mdate = str(form.get("movement_date") or "").strip()
    ref_type = str(form.get("ref_type") or "").strip()
    ref_no = str(form.get("ref_no") or "").strip()
    memo = str(form.get("memo") or "").strip()

    created = 0
    errors: list[str] = []
    for it in st.list_items(kind="individual"):
        code = it["item_code"]
        raw = str(form.get(f"qty_{code}") or "").strip()
        if raw == "":
            continue
        try:
            n = int(raw)
        except ValueError:
            errors.append(f"{code}: 숫자 아님")
            continue
        if n == 0:
            continue
        try:
            st.create_movement(
                movement_date=mdate, warehouse_code=wh, item_code=code,
                movement_type=mtype, qty=n, ref_type=ref_type, ref_no=ref_no,
                memo=memo, created_by=user["email"],
            )
            created += 1
        except ValueError as exc:
            errors.append(f"{code}: {exc}")
    if errors and created == 0:
        raise HTTPException(status_code=400, detail="; ".join(errors[:10]))
    return RedirectResponse(url=f"/malaysia/movements?wh={wh}&type={mtype}", status_code=303)


@router.post("/movements/set-out-bulk")
async def set_out_bulk(request: Request, user: dict[str, Any] = Depends(_require_user)) -> RedirectResponse:
    """세트 그리드 일괄 출고. form: movement_date, warehouse_code, ref_no, memo,
    qty_<SETCODE>... → 각 세트를 BOM 분해해 구성품별 OUT 생성.
    """
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    form = await request.form()
    wh = str(form.get("warehouse_code") or "").strip()
    mdate = str(form.get("movement_date") or "").strip()
    ref_no = str(form.get("ref_no") or "").strip()
    memo = str(form.get("memo") or "").strip()
    bmap = _bom_map(request)

    done = 0
    errors: list[str] = []
    for it in st.list_items(kind="set"):
        code = it["item_code"]
        raw = str(form.get(f"qty_{code}") or "").strip()
        if raw == "":
            continue
        try:
            n = int(raw)
        except ValueError:
            continue
        if n <= 0:
            continue
        try:
            st.create_set_out(
                movement_date=mdate, warehouse_code=wh, set_code=code, set_qty=n,
                bom_map=bmap, ref_type="set", ref_no=ref_no, memo=memo,
                created_by=user["email"],
            )
            done += 1
        except ValueError as exc:
            errors.append(f"{code}: {exc}")
    if errors and done == 0:
        raise HTTPException(status_code=400, detail="; ".join(errors[:10]))
    return RedirectResponse(url=f"/malaysia/movements?wh={wh}&type=OUT", status_code=303)


# ════════════════════════════════════════════════════════════
# 일일 재고조사
# ════════════════════════════════════════════════════════════
@router.get("/stocktakes", response_class=HTMLResponse)
async def stocktakes_page(request: Request) -> HTMLResponse:
    from app.main import render_template  # noqa: WPS433

    guard = _guard(request)
    if not isinstance(guard, tuple):
        return guard
    st, user = guard
    wh = _selected_wh(request, st)
    ctx = _base_ctx(request, user, st, wh=wh)
    ctx.update(
        {
            "page_title": "말레이시아 재고관리 — 일일 재고조사",
            "page_subtitle": f"{wh} · 조사 목록",
            "stocktakes": st.list_stocktakes(warehouse_code=wh),
            "today": today_kst().isoformat(),
        }
    )
    return render_template(request, "malaysia/stocktakes.html", ctx)


@router.post("/stocktakes")
async def stocktake_create(
    request: Request,
    stocktake_date: str = Form(...),
    warehouse_code: str = Form(...),
    memo: str = Form(""),
    user: dict[str, Any] = Depends(_require_user),
) -> RedirectResponse:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    try:
        head = st.create_stocktake(
            stocktake_date=stocktake_date, warehouse_code=warehouse_code,
            memo=memo, created_by=user["email"],
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    return RedirectResponse(url=f"/malaysia/stocktakes/{head['id']}", status_code=303)


@router.get("/stocktakes/{stocktake_id:int}", response_class=HTMLResponse)
async def stocktake_detail(request: Request, stocktake_id: int) -> HTMLResponse:
    from app.main import render_template  # noqa: WPS433
    from app.store import is_admin  # noqa: WPS433

    guard = _guard(request)
    if not isinstance(guard, tuple):
        return guard
    st, user = guard
    try:
        computed = st.compute_result(stocktake_id=stocktake_id, bom_map=_bom_map(request))
    except KeyError:
        return render_template(
            request, "denied.html",
            {"reason": "재고조사를 찾을 수 없습니다.", "is_admin": is_admin(user)},
            status_code=404,
        )
    head = computed["stocktake"]
    wh = head["warehouse_code"]
    # 입력된 라인 qty 를 코드별 dict 로 (그리드 기본값)
    entered = {ln["sku_code"]: ln["qty"] for ln in head.get("lines", [])}
    ctx = _base_ctx(request, user, st, wh=wh)
    ctx.update(
        {
            "page_title": f"재고조사 #{stocktake_id}",
            "page_subtitle": f"{head['stocktake_date']} · {wh} · {head['status']}",
            "stocktake": head,
            "individual_items": st.list_items(kind="individual"),
            "set_items": st.list_items(kind="set"),
            "entered": entered,
            "result_rows": computed["rows"],
            "missing_bom": computed["missing_bom"],
            "is_draft": head["status"] == "draft",
        }
    )
    return render_template(request, "malaysia/stocktake_detail.html", ctx)


@router.post("/stocktakes/{stocktake_id:int}/lines/bulk")
async def stocktake_lines_bulk(
    request: Request, stocktake_id: int, user: dict[str, Any] = Depends(_require_user)
) -> RedirectResponse:
    """그리드 일괄 저장. form: qty_<SKUCODE>... (낱개+세트). 빈칸은 스킵, 0 허용."""
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    form = await request.form()
    codes = [i["item_code"] for i in st.list_items(kind="individual")]
    codes += [i["item_code"] for i in st.list_items(kind="set")]
    errors: list[str] = []
    for code in codes:
        raw = str(form.get(f"qty_{code}") or "").strip()
        if raw == "":
            continue
        try:
            n = int(raw)
        except ValueError:
            errors.append(f"{code}: 숫자 아님")
            continue
        try:
            st.upsert_line(stocktake_id=stocktake_id, sku_code=code, qty=n)
        except KeyError:
            raise HTTPException(status_code=404, detail="재고조사를 찾을 수 없습니다.")
        except ValueError as exc:
            errors.append(f"{code}: {exc}")
    if errors:
        raise HTTPException(status_code=400, detail="; ".join(errors[:10]))
    return RedirectResponse(url=f"/malaysia/stocktakes/{stocktake_id}", status_code=303)


@router.post("/stocktakes/{stocktake_id:int}/lines/{line_id:int}/delete")
async def stocktake_line_delete(
    request: Request, stocktake_id: int, line_id: int,
    user: dict[str, Any] = Depends(_require_user),
) -> RedirectResponse:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    try:
        st.delete_line(stocktake_id=stocktake_id, line_id=line_id)
    except KeyError:
        raise HTTPException(status_code=404, detail="라인을 찾을 수 없습니다.")
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    return RedirectResponse(url=f"/malaysia/stocktakes/{stocktake_id}", status_code=303)


@router.post("/stocktakes/{stocktake_id:int}/finalize")
async def stocktake_finalize(
    request: Request, stocktake_id: int, user: dict[str, Any] = Depends(_require_user)
) -> RedirectResponse:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    try:
        st.finalize_stocktake(stocktake_id=stocktake_id, bom_map=_bom_map(request))
    except KeyError:
        raise HTTPException(status_code=404, detail="재고조사를 찾을 수 없습니다.")
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    return RedirectResponse(url=f"/malaysia/stocktakes/{stocktake_id}", status_code=303)


@router.post("/stocktakes/{stocktake_id:int}/cancel")
async def stocktake_cancel(
    request: Request, stocktake_id: int, user: dict[str, Any] = Depends(_require_user)
) -> RedirectResponse:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    try:
        st.cancel_stocktake(stocktake_id=stocktake_id)
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    return RedirectResponse(url=f"/malaysia/stocktakes/{stocktake_id}", status_code=303)


# ════════════════════════════════════════════════════════════
# JSON API
# ════════════════════════════════════════════════════════════
@router.get("/api/warehouses")
async def api_warehouses(request: Request, _: dict[str, Any] = Depends(_require_user)) -> JSONResponse:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    return JSONResponse({"warehouses": st.list_warehouses()})


@router.get("/api/items")
async def api_items(request: Request, kind: str = "", _: dict[str, Any] = Depends(_require_user)) -> JSONResponse:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    k = kind if kind in ("individual", "set") else None
    return JSONResponse({"items": st.list_items(kind=k)})


@router.get("/api/bom")
async def api_bom(request: Request, _: dict[str, Any] = Depends(_require_user)) -> JSONResponse:
    """itemcode_db(set_components)에서 읽은 MY- 세트 BOM (읽기 전용)."""
    return JSONResponse({"bom": _bom_map(request)})


@router.get("/api/stock")
async def api_stock(request: Request, wh: str = "", _: dict[str, Any] = Depends(_require_user)) -> JSONResponse:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    wh = wh.strip() or _selected_wh(request, st)
    return JSONResponse({"warehouse_code": wh, "rows": st.stock_status(warehouse_code=wh)})


@router.post("/api/movements")
async def api_movement_create(
    request: Request, payload: dict[str, Any] = Body(...), user: dict[str, Any] = Depends(_require_user)
) -> JSONResponse:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    try:
        row = st.create_movement(
            movement_date=str(payload.get("movement_date") or ""),
            warehouse_code=str(payload.get("warehouse_code") or ""),
            item_code=str(payload.get("item_code") or ""),
            movement_type=str(payload.get("movement_type") or ""),
            qty=int(payload.get("qty") or 0),
            ref_type=str(payload.get("ref_type") or ""),
            ref_no=str(payload.get("ref_no") or ""),
            memo=str(payload.get("memo") or ""),
            created_by=user["email"],
        )
    except (ValueError, TypeError) as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    return JSONResponse({"ok": True, "movement": row})


@router.post("/api/movements/set-out")
async def api_set_out(
    request: Request, payload: dict[str, Any] = Body(...), user: dict[str, Any] = Depends(_require_user)
) -> JSONResponse:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    try:
        rows = st.create_set_out(
            movement_date=str(payload.get("movement_date") or ""),
            warehouse_code=str(payload.get("warehouse_code") or ""),
            set_code=str(payload.get("set_code") or ""),
            set_qty=int(payload.get("set_qty") or 0),
            bom_map=_bom_map(request),
            ref_type=str(payload.get("ref_type") or "set"),
            ref_no=str(payload.get("ref_no") or ""),
            memo=str(payload.get("memo") or ""),
            created_by=user["email"],
        )
    except (ValueError, TypeError) as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    return JSONResponse({"ok": True, "movements": rows})


@router.get("/api/stocktakes/{stocktake_id:int}/result")
async def api_stocktake_result(
    request: Request, stocktake_id: int, _: dict[str, Any] = Depends(_require_user)
) -> JSONResponse:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    try:
        computed = st.compute_result(stocktake_id=stocktake_id, bom_map=_bom_map(request))
    except KeyError:
        raise HTTPException(status_code=404, detail="재고조사를 찾을 수 없습니다.")
    return JSONResponse(
        {"stocktake": computed["stocktake"], "rows": computed["rows"], "missing_bom": computed["missing_bom"]}
    )


@router.get("/health")
async def health() -> dict[str, str]:
    return {"status": "ok", "module": "malaysia"}