"""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.
- 상품명: 전역 itemcode_reader(itemcode_db 읽기 전용). 미설정 시 등록 스냅샷 사용.

화면(HTML) + JSON API 를 함께 제공한다. JSON API 는 /malaysia/api/* 아래.
"""

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 _itemcode(request: Request) -> Any:
    return getattr(request.app.state, "itemcode_reader", None)


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()
    warehouses = st.list_warehouses()
    codes = [w["warehouse_code"] for w in 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
# ════════════════════════════════════════════════════════════
@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 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")
async def movement_create(
    request: Request,
    movement_date: str = Form(...),
    warehouse_code: str = Form(...),
    item_code: str = Form(...),
    movement_type: str = Form(...),
    qty: int = Form(...),
    ref_type: str = Form(""),
    ref_no: 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:
        st.create_movement(
            movement_date=movement_date,
            warehouse_code=warehouse_code,
            item_code=item_code,
            movement_type=movement_type,
            qty=qty,
            ref_type=ref_type,
            ref_no=ref_no,
            memo=memo,
            created_by=user["email"],
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    return RedirectResponse(url=f"/malaysia/movements?wh={warehouse_code}", status_code=303)


@router.post("/movements/set-out")
async def movement_set_out(
    request: Request,
    movement_date: str = Form(...),
    warehouse_code: str = Form(...),
    set_code: str = Form(...),
    set_qty: int = Form(...),
    ref_type: str = Form("set"),
    ref_no: str = Form(""),
    memo: str = Form(""),
    user: dict[str, Any] = Depends(_require_user),
) -> RedirectResponse:
    """세트 주문 출고 → BOM 분해 후 구성품별 OUT 생성."""
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    try:
        st.create_set_out(
            movement_date=movement_date,
            warehouse_code=warehouse_code,
            set_code=set_code,
            set_qty=set_qty,
            ref_type=ref_type,
            ref_no=ref_no,
            memo=memo,
            created_by=user["email"],
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    return RedirectResponse(url=f"/malaysia/movements?wh={warehouse_code}", status_code=303)


# ════════════════════════════════════════════════════════════
# 세트 구성 관리 (set_bom)
# ════════════════════════════════════════════════════════════
@router.get("/sets", response_class=HTMLResponse)
async def sets_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)
    # 세트별로 묶어서 표시
    set_items = st.list_items(kind="set")
    bom = st.list_bom(include_inactive=True)
    by_set: dict[str, list[dict[str, Any]]] = {}
    for b in bom:
        by_set.setdefault(b["set_code"], []).append(b)
    names = st.item_name_map()
    ctx.update(
        {
            "page_title": "말레이시아 재고관리 — 세트 구성",
            "page_subtitle": "MY- 세트 BOM 관리 (구성품은 MT-/MX-/MZ-)",
            "set_items": set_items,
            "individual_items": st.list_items(kind="individual"),
            "by_set": by_set,
            "names": names,
        }
    )
    return render_template(request, "malaysia/sets.html", ctx)


@router.post("/sets/bom")
async def bom_upsert(
    request: Request,
    set_code: str = Form(...),
    component_code: str = Form(...),
    component_qty: int = 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:
        st.upsert_bom_line(
            set_code=set_code, component_code=component_code, component_qty=component_qty
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    return RedirectResponse(url="/malaysia/sets", status_code=303)


@router.post("/sets/bom/{bom_id:int}/delete")
async def bom_delete(
    request: Request,
    bom_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_bom_line(bom_id=bom_id)
    except KeyError:
        raise HTTPException(status_code=404, detail="BOM 라인을 찾을 수 없습니다.")
    return RedirectResponse(url="/malaysia/sets", 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)
    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"]
    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"),
            "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")
async def stocktake_line_upsert(
    request: Request,
    stocktake_id: int,
    sku_code: str = Form(...),
    qty: int = 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:
        st.upsert_line(stocktake_id=stocktake_id, sku_code=sku_code, qty=qty, memo=memo)
    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}/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)
    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 (요구사항 6) — /malaysia/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:
    """kind=individual → MT/MX/MZ, kind=set → MY, 미지정 → 전체."""
    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:
    st = _store(request)
    if st is None:
        raise HTTPException(status_code=503, detail="malaysia_stock_db 미설정")
    return JSONResponse({"bom": st.list_bom(include_inactive=True)})


@router.post("/api/bom")
async def api_bom_upsert(
    request: Request,
    payload: dict[str, Any] = Body(...),
    _: 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.upsert_bom_line(
            set_code=str(payload.get("set_code") or ""),
            component_code=str(payload.get("component_code") or ""),
            component_qty=int(payload.get("component_qty") or 0),
        )
    except (ValueError, TypeError) as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    return JSONResponse({"ok": True, "bom": row})


@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:
    """단일 낱개 movement 생성. body: {movement_date,warehouse_code,item_code,movement_type,qty,...}."""
    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:
    """세트 출고(BOM 분해). body: {movement_date,warehouse_code,set_code,set_qty,...}."""
    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),
            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:
    """재고조사 최종 계산 결과(낱개 기준 direct/from_set/total)."""
    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)
    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"}