mtsd/backend/app/api/mini_client_extra.py

"""小程序客户端扩展接口：购物车、商品分类、仪表盘、发票、下单、支付"""
from typing import Optional, List, Tuple, Dict
from decimal import Decimal
from fastapi import APIRouter, Depends, Query
from sqlalchemy.orm import Session
from sqlalchemy import and_

from app.core.database import get_db
from app.core.auth import get_current_user
from app.core.response import success_response, error_response
from app.core.config import settings
from app.core.utils import generate_id
from datetime import datetime
import random

from app.models.models import BizInvoice, BizWechatPay, BizPriceListItem, BasProductUnit
from app.crud.user import user_crud
from app.crud.address import address_crud
from app.crud.client_cart import client_cart_crud
from app.crud.price_list import price_list_crud, price_list_item_crud
from app.crud.product import product_crud
from app.models.models import BasProduct, BasProductCategory
from app.crud.order import order_crud
from app.crud.category import category_crud
from app.crud.unit import unit_crud
from app.crud.product_banner import product_banner
from app.crud.product_detail_media import product_detail_media
from app.crud.product_parameter_value import product_parameter_value
from app.api.mini_client import require_client

router = APIRouter(prefix="/api/mini/client", tags=["小程序端-客户端扩展"])


def _upsert_wechat_pay_pending(
    db: Session,
    *,
    order_id: str,
    out_trade_no: str,
    total_fee: int,
    operator_id: Optional[str],
    operator_name: Optional[str],
) -> BizWechatPay:
    """创建支付单时落一条待支付微信流水（按 out_trade_no 幂等）。"""
    row = (
        db.query(BizWechatPay)
        .filter(BizWechatPay.out_trade_no == out_trade_no, BizWechatPay.is_del == 0)
        .first()
    )
    if row:
        row.order_id = order_id
        row.total_fee = total_fee
        row.trade_state = row.trade_state or "NOTPAY"
        row.trade_state_desc = row.trade_state_desc or "统一下单成功，待支付"
        row.update_at = datetime.now()
        row.update_by = operator_id
        return row

    row = BizWechatPay(
        id=generate_id(),
        order_id=order_id,
        out_trade_no=out_trade_no,
        total_fee=total_fee,
        trade_state="NOTPAY",
        trade_state_desc="统一下单成功，待支付",
        create_by=operator_id,
        create_name=operator_name,
        update_by=operator_id,
    )
    db.add(row)
    return row


def _cart_item_to_dict(
    row,
    product: Optional[BasProduct] = None,
    root_category: Optional[BasProductCategory] = None,
) -> dict:
    return {
        "id": row.id,
        "productId": row.product_id,
        "productName": row.product_name or "",
        "categoryId": product.category_id if product and product.category_id else None,
        "firstCategoryId": root_category.id if root_category else None,
        "firstCategoryName": (root_category.name if root_category else None) or "",
        "categoryName": row.category_name or "",
        "unitName": row.unit_name or "",
        "measureValue": float(product.measure_value) if (product and product.measure_value is not None) else None,
        "price": float(row.unit_price) if row.unit_price is not None else 0,
        "quantity": float(row.quantity) if row.quantity is not None else 0,
        "amount": float(row.amount) if row.amount is not None else 0,
        "imageUrl": row.image_url,
    }


def _root_and_leaf_category(
    db: Session, category_id: Optional[str], cache: Dict[str, Tuple[Optional[BasProductCategory], Optional[BasProductCategory]]]
) -> Tuple[Optional[BasProductCategory], Optional[BasProductCategory]]:
    """从叶子分类 id 向上解析（含缓存）：返回 (根分类, 叶子分类)。"""
    if not category_id:
        return None, None
    if category_id in cache:
        return cache[category_id]
    leaf = category_crud.get(db, category_id)
    if not leaf or getattr(leaf, "is_del", 0):
        cache[category_id] = (None, None)
        return None, None
    cur = leaf
    guard = 0
    while cur.parent_id and guard < 10:
        parent = category_crud.get(db, cur.parent_id)
        if not parent or getattr(parent, "is_del", 0):
            break
        cur = parent
        guard += 1
    root = cur
    cache[category_id] = (root, leaf)
    return root, leaf


def _cart_resolve_root_category(db: Session, product: Optional[BasProduct]) -> Optional[BasProductCategory]:
    """商品对应的一级（根）分类，供购物车行展示与序列化。"""
    if not product or not product.category_id:
        return None
    cache: Dict[str, Tuple[Optional[BasProductCategory], Optional[BasProductCategory]]] = {}
    root, _ = _root_and_leaf_category(db, product.category_id, cache)
    return root


def _cart_row_sort_key(
    db: Session,
    row,
    pmap: dict,
    cat_cache: Dict[str, Tuple[Optional[BasProductCategory], Optional[BasProductCategory]]],
) -> tuple:
    """购物车：先一级分类 sort_order，再商品名、商品 id（稳定）。"""
    product = pmap.get(row.product_id)
    pname = (row.product_name or (product.name if product else "") or "").lower()
    pid = row.product_id or ""
    if not product or not product.category_id:
        return (999999, pname, pid)
    root, _leaf = _root_and_leaf_category(db, product.category_id, cat_cache)
    fo = int(root.sort_order) if root else 999999
    return (fo, pname, pid)


def _cart_rows_after_sync(db: Session, uid: str, region_id: Optional[str], op: dict) -> List:
    """当前用户有效购物车行（含区域价目表同步、过滤已删）。"""
    rows = client_cart_crud.list_by_client(db, uid)
    if region_id:
        client_cart_crud.sync_to_active_price_list(db, uid, region_id, op, rows=rows)
        rows = [r for r in rows if getattr(r, "is_del", 0) == 0]
    return rows


def _cart_list_dicts(db: Session, rows: List) -> List[dict]:
    """将购物车 ORM 行序列化为与 GET /cart 一致的 list 项（仅未删除行）。"""
    rows = [r for r in rows if getattr(r, "is_del", 0) == 0]
    product_ids = list({r.product_id for r in rows if r and getattr(r, "product_id", None)})
    products = (
        db.query(BasProduct)
        .filter(and_(BasProduct.id.in_(product_ids), BasProduct.is_del == 0))
        .all()
        if product_ids
        else []
    )
    pmap = {p.id: p for p in products}
    cat_cache: Dict[str, Tuple[Optional[BasProductCategory], Optional[BasProductCategory]]] = {}
    rows_sorted = sorted(rows, key=lambda r: _cart_row_sort_key(db, r, pmap, cat_cache))
    out: List[dict] = []
    for r in rows_sorted:
        p = pmap.get(r.product_id)
        root: Optional[BasProductCategory] = None
        if p and p.category_id:
            root, _ = _root_and_leaf_category(db, p.category_id, cat_cache)
        out.append(_cart_item_to_dict(r, p, root))
    return out


@router.get("/cart/summary", response_model=dict)
def cart_summary(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    """购物车汇总（件数、行数、金额），供 Tab 角标等轻量刷新。"""
    uid = current_user.get("user_id")
    region_id = current_user.get("region_id")
    op = {"user_id": uid, "real_name": current_user.get("real_name")}
    rows = _cart_rows_after_sync(db, uid, region_id, op)
    tq = sum(float(r.quantity or 0) for r in rows)
    ta = sum(float(r.amount or 0) for r in rows)
    return success_response({
        "lineCount": len(rows),
        "totalQuantity": tq,
        "totalAmount": ta,
    })


@router.get("/cart", response_model=dict)
def list_cart(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
    page: Optional[int] = Query(None, ge=1, description="传则分页；不传则返回全量 list（兼容确认订单等）"),
    pageSize: Optional[int] = Query(None, ge=1, le=100, description="分页时每页条数，默认 20"),
):
    uid = current_user.get("user_id")
    region_id = current_user.get("region_id")
    op = {"user_id": uid, "real_name": current_user.get("real_name")}
    rows = _cart_rows_after_sync(db, uid, region_id, op)
    full_list = _cart_list_dicts(db, rows)
    if page is None:
        return success_response({"list": full_list})
    ps = pageSize if pageSize is not None else 20
    total = len(full_list)
    start = (page - 1) * ps
    chunk = full_list[start : start + ps]
    total_pages = (total + ps - 1) // ps if total else 0
    return success_response({
        "list": chunk,
        "total": total,
        "page": page,
        "pageSize": ps,
        "totalPages": total_pages,
    })


@router.post("/cart", response_model=dict)
def add_cart(
    request: dict,
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    product_id = request.get("productId")
    quantity = Decimal(str(request.get("quantity", 1)))
    if not product_id or quantity <= 0:
        return error_response(400, "商品与数量无效")

    region_id = current_user.get("region_id")
    if not region_id:
        return error_response(400, "用户未绑定区域")

    pl = price_list_crud.get_active(db, region_id)
    if not pl:
        return error_response(404, "当前区域无生效价格清单")

    # 只查询该商品对应的价目表行，避免拉取整张价目表明细导致加购变慢
    pi = price_list_item_crud.get_by_product_and_price_list(db, product_id, pl.id)
    if not pi:
        return error_response(400, "商品不在当前价格清单中")

    # 用一次 JOIN 拉齐商品 + 单位 + 分类，避免 3 次单查
    from app.models.models import BasProductUnit, BasProductCategory

    q = (
        db.query(BasProduct, BasProductUnit.name, BasProductCategory.name)
        .select_from(BasProduct)
        # 明确从 BasProduct 出发，避免 join 路径歧义
        .outerjoin(BasProductUnit, BasProductUnit.id == pi.unit_id)
        .outerjoin(BasProductCategory, BasProductCategory.id == BasProduct.category_id)
        .filter(and_(BasProduct.id == product_id, BasProduct.is_del == 0))
    )
    r = q.first()
    product = r[0] if r else None
    unit_name = r[1] if r else ""
    cat_name = r[2] if r else ""

    op = {"user_id": current_user.get("user_id"), "real_name": current_user.get("real_name")}
    row = client_cart_crud.add_or_update(
        db,
        client_id=current_user.get("user_id"),
        price_list_id=pl.id,
        product_id=product_id,
        unit_id=pi.unit_id,
        quantity=quantity,
        unit_price=Decimal(str(pi.price)),
        product_name=product.name if product else "",
        unit_name=unit_name or "",
        category_name=cat_name,
        image_url=product.image_url if product else "",
        operator=op,
    )
    root_cat = _cart_resolve_root_category(db, product)
    return success_response(_cart_item_to_dict(row, product, root_cat))


@router.put("/cart/{cart_id}", response_model=dict)
def put_cart(
    cart_id: str,
    request: dict,
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    qty = Decimal(str(request.get("quantity", 0)))
    if qty <= 0:
        return error_response(400, "数量无效")
    uid = current_user.get("user_id")
    region_id = current_user.get("region_id")
    op = {"user_id": uid, "real_name": current_user.get("real_name")}

    # 先拿到该行，只有当其 price_list_id 不是当前生效清单时才触发“全车同步”
    cur = client_cart_crud.get(db, cart_id)
    if not cur or cur.client_id != uid:
        return error_response(404, "购物车项不存在")
    need_full_cart = False
    if region_id:
        pl = price_list_crud.get_active(db, region_id)
        if pl and getattr(cur, "price_list_id", None) != pl.id:
            client_cart_crud.sync_to_active_price_list(db, uid, region_id, op)
            # 同步可能合并/软删多行，前端需拉全量列表
            need_full_cart = True

    row = client_cart_crud.update_quantity(db, cart_id, uid, qty, op, current_row=cur)
    if not row:
        return error_response(404, "购物车项不存在")
    # 行更新接口优先返回轻量字段，避免每次点加减都额外查询商品/分类。
    line = _cart_item_to_dict(row, None, None)
    if need_full_cart:
        # 与 GET /cart 同结构，避免前端再发一次全量请求
        rows_after = _cart_rows_after_sync(db, uid, region_id, op)
        return success_response({"list": _cart_list_dicts(db, rows_after), "item": line})
    return success_response(line)


@router.delete("/cart", response_model=dict)
def delete_cart_clear(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    op = {"user_id": current_user.get("user_id"), "real_name": current_user.get("real_name")}
    n = client_cart_crud.clear(db, current_user.get("user_id"), op)
    return success_response({"cleared": n})


@router.delete("/cart/batch", response_model=dict)
def delete_cart_batch(
    request: dict,
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    ids = request.get("cartIds") or []
    if not isinstance(ids, list):
        return error_response(400, "cartIds 格式错误")
    op = {"user_id": current_user.get("user_id"), "real_name": current_user.get("real_name")}
    n = client_cart_crud.batch_delete(db, current_user.get("user_id"), ids, op)
    return success_response({"removed": n})


@router.delete("/cart/{cart_id}", response_model=dict)
def delete_cart_one(
    cart_id: str,
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    op = {"user_id": current_user.get("user_id"), "real_name": current_user.get("real_name")}
    ok = client_cart_crud.soft_delete(db, cart_id, current_user.get("user_id"), op)
    if not ok:
        return error_response(404, "购物车项不存在")
    return success_response({"ok": True})


@router.get("/price-list", response_model=dict)
def get_price_list_alias(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    """与 /price-list/current 相同，便于小程序路径统一"""
    user = user_crud.get(db, current_user.get("user_id"))
    if not user or not user.region_id:
        return error_response(400, "用户未绑定区域")
    price_list = price_list_crud.get_active(db, user.region_id)
    if not price_list:
        return error_response(404, "暂无生效价格清单")

    items = price_list_item_crud.get_by_price_list(db, price_list.id)
    item_details = []
    for item in items:
        product = product_crud.get(db, item.product_id)
        unit = unit_crud.get(db, item.unit_id) if item.unit_id else None
        item_details.append({
            "productId": item.product_id,
            "productName": product.name if product else None,
            "unitId": item.unit_id,
            "unitName": unit.name if unit else None,
            "price": float(item.price) if item.price else 0,
            "imageUrl": product.image_url if product else None,
        })
    return success_response({
        "id": price_list.id,
        "regionId": price_list.region_id,
        "version": price_list.version,
        "items": item_details,
    })


@router.get("/price-list/active-version", response_model=dict)
def get_active_price_list_version(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    """轻量接口：获取当前区域生效价格清单的版本信息（用于客户端兜底校验/去重刷新）。"""
    user = user_crud.get(db, current_user.get("user_id"))
    if not user or not user.region_id:
        return error_response(400, "用户未绑定区域")

    pl = price_list_crud.get_active(db, user.region_id)
    if not pl:
        return success_response(None)

    return success_response({
        "priceListId": pl.id,
        "priceVersion": getattr(pl, "version", 0) or 0,
        "publishedTime": str(getattr(pl, "published_time", None)) if getattr(pl, "published_time", None) else None,
    })


def _sort_category_dicts_locally(cats: List[dict]) -> List[dict]:
    def _key(c: dict):
        return (
            int(c.get("sortOrder") or 0),
            (c.get("name") or "").lower(),
            c.get("id") or "",
        )

    return sorted(cats, key=_key)


def _client_aggregated_categories(db: Session, current_user: dict) -> Tuple[Optional[List[dict]], Optional[str]]:
    """返回 (分类 dict 列表, 错误信息)。无清单时返回 ([], None)。"""
    user = user_crud.get(db, current_user.get("user_id"))
    if not user or not user.region_id:
        return None, "用户未绑定区域"
    pl = price_list_crud.get_active(db, user.region_id)
    if not pl:
        return [], None
    items = price_list_item_crud.get_by_price_list(db, pl.id)
    pmap: Dict[str, dict] = {}
    for it in items:
        product = product_crud.get(db, it.product_id)
        if not product or not product.category_id:
            continue
        cid = product.category_id
        if cid not in pmap:
            cat = category_crud.get(db, cid)
            pmap[cid] = {
                "id": cid,
                "name": cat.name if cat else "",
                "parentId": cat.parent_id if cat else None,
                "sortOrder": cat.sort_order if cat else 0,
                "isActive": True,
                "imageUrl": cat.image_url if cat else None,
            }
    return list(pmap.values()), None


@router.get("/product-categories", response_model=dict)
def list_product_categories(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    """基于当前生效价格清单中的商品，聚合分类（全量，兼容旧调用）"""
    cats, err = _client_aggregated_categories(db, current_user)
    if err:
        return error_response(400, err)
    return success_response(cats)


@router.get("/product-categories/first-level", response_model=dict)
def list_product_categories_first_level(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
    page: int = Query(1, ge=1),
    pageSize: int = Query(8, ge=1, le=50),
):
    """首页一级分类（swiper），服务端分页"""
    cats, err = _client_aggregated_categories(db, current_user)
    if err:
        return error_response(400, err)
    sorted_all = _sort_category_dicts_locally(cats or [])
    roots = [c for c in sorted_all if not c.get("parentId")]
    total = len(roots)
    start = (page - 1) * pageSize
    slice_roots = roots[start : start + pageSize]
    out = [
        {
            "id": c["id"],
            "name": c["name"],
            "imageUrl": c.get("imageUrl") or "",
        }
        for c in slice_roots
    ]
    total_pages = (total + pageSize - 1) // pageSize if total else 0
    return success_response({
        "list": out,
        "total": total,
        "page": page,
        "pageSize": pageSize,
        "totalPages": total_pages,
    })


@router.get("/product-categories/sidebar", response_model=dict)
def list_product_categories_sidebar(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
    firstCategoryId: str = Query("all", description="一级分类 id，all 表示顶部选「全部」"),
    page: int = Query(1, ge=1),
    pageSize: int = Query(30, ge=1, le=100),
):
    """首页左侧二级分类栏选项，服务端分页（含「全部」行）"""
    cats, err = _client_aggregated_categories(db, current_user)
    if err:
        return error_response(400, err)
    sorted_all = _sort_category_dicts_locally(cats or [])
    roots = [c for c in sorted_all if not c.get("parentId")]
    rows: List[dict] = [{"id": "all", "name": "全部"}]
    fid = (firstCategoryId or "all").strip()
    if fid == "all":
        rows.extend({"id": c["id"], "name": c["name"]} for c in roots)
    else:
        children = [c for c in sorted_all if c.get("parentId") == fid]
        rows.extend({"id": c["id"], "name": c["name"]} for c in children)
    total = len(rows)
    start = (page - 1) * pageSize
    chunk = rows[start : start + pageSize]
    total_pages = (total + pageSize - 1) // pageSize if total else 0
    return success_response({
        "list": chunk,
        "total": total,
        "page": page,
        "pageSize": pageSize,
        "totalPages": total_pages,
    })


def _root_category_id_for_leaf(db: Session, category_id: Optional[str], memo: Dict[str, Optional[str]]) -> Optional[str]:
    """商品分类叶子节点向上解析一级（根）分类 id，与小程序端 getFirstCategoryId 一致。"""
    if not category_id:
        return None
    if category_id in memo:
        return memo[category_id]
    cur: Optional[str] = category_id
    chain: List[str] = []
    while cur and len(chain) < 32:
        chain.append(cur)
        cat = category_crud.get(db, cur)
        if not cat:
            root = chain[-1]
            for cid in chain:
                memo[cid] = root
            return root
        if not cat.parent_id:
            root = cat.id
            for cid in chain:
                memo[cid] = root
            return root
        cur = cat.parent_id
    root = chain[-1] if chain else None
    for cid in chain:
        memo[cid] = root
    return root


@router.get("/products", response_model=dict)
def list_products(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
    page: int = Query(1, ge=1),
    pageSize: int = Query(20, ge=1, le=100),
    categoryId: Optional[str] = None,
    rootCategoryId: Optional[str] = None,
    keyword: Optional[str] = None,
):
    """分页查询当前价目表中的商品（与 price-list/products 一致逻辑）"""
    user = user_crud.get(db, current_user.get("user_id"))
    if not user or not user.region_id:
        return error_response(400, "用户未绑定区域")
    pl = price_list_crud.get_active(db, user.region_id)
    if not pl:
        return success_response({"list": [], "total": 0, "page": page, "pageSize": pageSize, "totalPages": 0})
    item_rows = (
        db.query(
            BizPriceListItem.product_id,
            BizPriceListItem.unit_id,
            BizPriceListItem.price,
            BasProduct.id.label("pid"),
            BasProduct.name.label("product_name"),
            BasProduct.category_id.label("category_id"),
            BasProduct.measure_value.label("measure_value"),
            BasProduct.description.label("description"),
            BasProduct.image_url.label("image_url"),
            BasProductUnit.name.label("unit_name"),
        )
        .join(
            BasProduct,
            and_(BizPriceListItem.product_id == BasProduct.id, BasProduct.is_del == 0),
        )
        .outerjoin(
            BasProductUnit,
            and_(BizPriceListItem.unit_id == BasProductUnit.id, BasProductUnit.is_del == 0),
        )
        .filter(BizPriceListItem.price_list_id == pl.id, BizPriceListItem.is_del == 0)
        .all()
    )

    category_ids = {r.category_id for r in item_rows if getattr(r, "category_id", None)}
    cat_rows = (
        db.query(BasProductCategory)
        .filter(BasProductCategory.id.in_(category_ids), BasProductCategory.is_del == 0)
        .all()
        if category_ids
        else []
    )
    cat_cache: Dict[str, Optional[BasProductCategory]] = {c.id: c for c in cat_rows}

    # 补齐父链缓存，避免排序/根分类判断时再次打 DB
    pending = [c for c in cat_rows if getattr(c, "parent_id", None)]
    while pending:
        parent_ids = {c.parent_id for c in pending if c.parent_id and c.parent_id not in cat_cache}
        if not parent_ids:
            break
        parents = (
            db.query(BasProductCategory)
            .filter(BasProductCategory.id.in_(parent_ids), BasProductCategory.is_del == 0)
            .all()
        )
        if not parents:
            break
        for p in parents:
            cat_cache[p.id] = p
        pending = [p for p in parents if getattr(p, "parent_id", None)]

    def _root_category_id_from_cache(cid: Optional[str]) -> Optional[str]:
        if not cid:
            return None
        cur = cid
        seen = set()
        for _ in range(32):
            if not cur or cur in seen:
                break
            seen.add(cur)
            c = cat_cache.get(cur)
            if not c:
                return cur
            if not getattr(c, "parent_id", None):
                return c.id
            cur = c.parent_id
        return cur

    rows = []
    kw = keyword.lower() if keyword else None
    for item in item_rows:
        if categoryId and item.category_id != categoryId:
            continue
        if rootCategoryId and _root_category_id_from_cache(item.category_id) != rootCategoryId:
            continue
        if kw and kw not in (item.product_name or "").lower():
            continue
        cat = cat_cache.get(item.category_id) if item.category_id else None
        rows.append({
            "id": item.pid,
            "name": item.product_name,
            "categoryId": item.category_id,
            "categoryName": cat.name if cat else "",
            "unitId": item.unit_id,
            "unitName": item.unit_name or "",
            "measureValue": float(item.measure_value) if item.measure_value is not None else None,
            "description": item.description,
            "imageUrl": item.image_url,
            "price": float(item.price) if item.price else 0,
            "isActive": True,
            "sortOrder": 0,
        })

    def _sort_tuple(r: dict) -> Tuple:
        cid = r.get("categoryId")
        first_ord = 0
        second_ord = 0
        if cid:
            chain: List[BasProductCategory] = []
            cur: Optional[str] = cid
            for _ in range(32):
                c = cat_cache.get(cur) if cur else None
                if not c:
                    break
                chain.append(c)
                if not c.parent_id:
                    break
                cur = c.parent_id
            if chain:
                second_ord = int(chain[0].sort_order or 0)
                first_ord = int(chain[-1].sort_order or 0)
        name = (r.get("name") or "").lower()
        sid = r.get("id") or ""
        return (first_ord, second_ord, int(r.get("sortOrder") or 0), name, sid)

    rows.sort(key=_sort_tuple)
    total = len(rows)
    start = (page - 1) * pageSize
    paginated = rows[start : start + pageSize]
    total_pages = (total + pageSize - 1) // pageSize if total else 0
    return success_response({
        "list": paginated,
        "total": total,
        "page": page,
        "pageSize": pageSize,
        "totalPages": total_pages,
    })


@router.get("/products/{product_id}", response_model=dict)
def get_client_product_detail(
    product_id: str,
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    """客户端商品详情：价目表内商品 + 轮播图 + 参数值 + 富文本 + 详情媒体（图/视频）"""
    user = user_crud.get(db, current_user.get("user_id"))
    if not user or not user.region_id:
        return error_response(400, "用户未绑定区域")

    pl = price_list_crud.get_active(db, user.region_id)
    if not pl:
        return error_response(404, "暂无生效价格清单")

    items = price_list_item_crud.get_by_price_list(db, pl.id)
    line = next((it for it in items if it.product_id == product_id), None)
    if not line:
        return error_response(404, "商品不存在或不在当前价目表")

    product = product_crud.get(db, product_id)
    if not product or getattr(product, "is_del", 0) == 1:
        return error_response(404, "商品不存在")

    unit = unit_crud.get(db, line.unit_id) if line.unit_id else None
    cat_name = ""
    if product.category_id:
        cat = category_crud.get(db, product.category_id)
        cat_name = cat.name if cat else ""

    banners_raw = product_banner.get_by_product(db, product_id)
    banners = [{
        "mediaType": b.media_type,
        "fileUrl": b.file_url,
        "thumbnailUrl": b.thumbnail_url,
        "sortOrder": b.sort_order,
    } for b in banners_raw]

    pv_rows = product_parameter_value.get_by_product_with_detail(db, product_id)
    parameter_values = []
    for row in pv_rows:
        val = row.get("param_value")
        if val is None or str(val).strip() == "":
            continue
        parameter_values.append({
            "parameterId": row.get("parameter_id"),
            "parameterName": row.get("parameter_name") or "",
            "paramValue": str(val),
        })

    media_raw = product_detail_media.get_by_product(db, product_id)
    detail_media = []
    for m in media_raw:
        if m.content_type not in ("image", "video"):
            continue
        if not m.file_url:
            continue
        detail_media.append({
            "id": m.id,
            "contentType": m.content_type,
            "fileUrl": m.file_url,
            "thumbnailUrl": m.thumbnail_url,
            "description": m.description,
            "sortOrder": m.sort_order,
        })

    product_payload = {
        "id": product.id,
        "name": product.name,
        "skuCode": product.sku_code,
        "categoryId": product.category_id,
        "categoryName": cat_name,
        "unitId": line.unit_id,
        "unitName": unit.name if unit else None,
        "measureValue": float(product.measure_value) if getattr(product, "measure_value", None) is not None else None,
        "price": float(line.price) if line.price else 0,
        "imageUrl": product.image_url,
        "description": product.description or "",
        "detailContent": product.detail_content or "",
        "isActive": bool(getattr(product, "is_active", 1)),
    }

    return success_response({
        "product": product_payload,
        "banners": banners,
        "parameterValues": parameter_values,
        "detailMedia": detail_media,
    })


@router.get("/products-ro/{product_id}", response_model=dict)
def get_client_product_detail_readonly(
    product_id: str,
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    """客户端只读商品详情：用于订单历史等场景，不依赖区域价目表。"""
    product = product_crud.get(db, product_id)
    if not product or getattr(product, "is_del", 0) == 1:
        return error_response(404, "商品不存在")

    unit = unit_crud.get(db, product.unit_id) if getattr(product, "unit_id", None) else None
    cat_name = ""
    if getattr(product, "category_id", None):
        cat = category_crud.get(db, product.category_id)
        cat_name = cat.name if cat else ""

    banners_raw = product_banner.get_by_product(db, product_id)
    banners = [{
        "mediaType": b.media_type,
        "fileUrl": b.file_url,
        "thumbnailUrl": b.thumbnail_url,
        "sortOrder": b.sort_order,
    } for b in banners_raw]

    pv_rows = product_parameter_value.get_by_product_with_detail(db, product_id)
    parameter_values = []
    for row in pv_rows:
        val = row.get("param_value")
        if val is None or str(val).strip() == "":
            continue
        parameter_values.append({
            "parameterId": row.get("parameter_id"),
            "parameterName": row.get("parameter_name") or "",
            "paramValue": str(val),
        })

    media_raw = product_detail_media.get_by_product(db, product_id)
    detail_media = []
    for m in media_raw:
        if m.content_type not in ("image", "video"):
            continue
        if not m.file_url:
            continue
        detail_media.append({
            "id": m.id,
            "contentType": m.content_type,
            "fileUrl": m.file_url,
            "thumbnailUrl": m.thumbnail_url,
            "description": m.description,
            "sortOrder": m.sort_order,
        })

    product_payload = {
        "id": product.id,
        "name": product.name,
        "skuCode": product.sku_code,
        "categoryId": product.category_id,
        "categoryName": cat_name,
        "unitId": getattr(product, "unit_id", None),
        "unitName": unit.name if unit else None,
        "measureValue": float(product.measure_value) if getattr(product, "measure_value", None) is not None else None,
        # 价格由前端在只读订单场景使用历史成交价（fallbackPrice）展示，这里不做价目表绑定
        "price": 0,
        "imageUrl": product.image_url,
        "description": product.description or "",
        "detailContent": product.detail_content or "",
        "isActive": bool(getattr(product, "is_active", 1)),
    }

    return success_response({
        "product": product_payload,
        "banners": banners,
        "parameterValues": parameter_values,
        "detailMedia": detail_media,
    })


@router.post("/orders/from-cart", response_model=dict)
def create_order_from_cart(
    request: dict,
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    address_id = request.get("addressId")
    payment_method = order_crud.normalize_payment_method(request.get("paymentMethod", "online"))
    remark = request.get("remark")
    if not address_id:
        return error_response(400, "请选择配送地址")

    uid = current_user.get("user_id")
    user = user_crud.get(db, uid)
    if not user or not user.region_id:
        return error_response(400, "用户未绑定区域")

    creator = {"user_id": uid, "real_name": current_user.get("real_name")}
    client_cart_crud.sync_to_active_price_list(db, uid, user.region_id, creator)

    pl = price_list_crud.get_active(db, user.region_id)
    if not pl:
        return error_response(404, "当前区域无生效价格清单")

    lines = client_cart_crud.list_by_client(db, uid)
    if not lines:
        return error_response(400, "购物车为空")

    price_items = price_list_item_crud.get_by_price_list(db, pl.id)
    pmap = {i.product_id: i for i in price_items}

    address = address_crud.get(db, address_id)
    if not address or address.user_id != uid:
        return error_response(404, "地址不存在")

    order_items = []
    for ln in lines:
        if ln.product_id not in pmap:
            return error_response(
                400,
                "购物车中含有已不在当前区域价格清单的商品，请返回购物车刷新后移除无效商品再下单",
            )
        if ln.price_list_id != pl.id:
            return error_response(400, "购物车价格已更新，请返回购物车刷新后再下单")
        order_items.append({
            "productId": ln.product_id,
            "unitId": ln.unit_id,
            "quantity": float(ln.quantity),
            "unitPrice": float(ln.unit_price),
        })

    price_list_id = pl.id
    full_address = f"{address.province or ''}{address.city or ''}{address.district or ''}{address.detail_address or ''}"
    order = order_crud.create_order(
        db,
        client_id=current_user.get("user_id"),
        region_id=user.region_id,
        price_list_id=price_list_id,
        price_version=pl.version,
        items=order_items,
        address_id=address_id,
        address_info={
            "contactPerson": address.contact_person,
            "contactPhone": address.contact_phone,
            "fullAddress": full_address,
        },
        payment_method=payment_method,
        remark=remark,
        creator=creator,
    )
    client_cart_crud.clear(db, current_user.get("user_id"), creator)
    return success_response({
        "orderId": order.id,
        "orderNo": order.order_no,
        "totalAmount": float(order.total_amount),
        "status": order.status,
        "paymentMethod": order.payment_method,
    })


@router.get("/dashboard/statistics", response_model=dict)
def client_dashboard_stats(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    cid = current_user.get("user_id")
    today = datetime.now().replace(hour=0, minute=0, second=0, microsecond=0)
    orders, _ = order_crud.get_multi_with_filters(db, client_id=cid, skip=0, limit=5000)
    pending_pay = sum(1 for o in orders if o.status == "pending_payment")
    delivering = sum(1 for o in orders if getattr(o, "order_status", None) == "pending_confirm")
    completed = sum(1 for o in orders if o.status == "completed")
    total_amt = sum(float(o.total_amount or 0) for o in orders if o.create_at and o.create_at >= today)
    return success_response({
        "pendingPayment": pending_pay,
        "delivering": delivering,
        "completed": completed,
        "todayOrderAmount": total_amt,
    })


@router.get("/invoices", response_model=dict)
def list_client_invoices(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
    page: int = Query(1, ge=1),
    pageSize: int = Query(10, ge=1, le=100),
    status: Optional[str] = None,
):
    q = db.query(BizInvoice).filter(
        and_(BizInvoice.client_id == current_user.get("user_id"), BizInvoice.is_del == 0)
    )
    if status:
        q = q.filter(BizInvoice.status == status)
    total = q.count()
    rows = q.order_by(BizInvoice.create_at.desc()).offset((page - 1) * pageSize).limit(pageSize).all()
    lst = [{
        "id": r.id,
        "invoiceNo": r.invoice_no,
        "orderId": r.order_id,
        "title": r.title,
        "invoiceAmount": float(r.invoice_amount) if r.invoice_amount else 0,
        "status": r.status,
        "createAt": str(r.create_at) if r.create_at else None,
    } for r in rows]
    return success_response({
        "list": lst,
        "total": total,
        "page": page,
        "pageSize": pageSize,
        "totalPages": (total + pageSize - 1) // pageSize if total else 0,
    })


@router.get("/invoices/summary", response_model=dict)
def invoice_summary(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    rows = db.query(BizInvoice).filter(
        and_(BizInvoice.client_id == current_user.get("user_id"), BizInvoice.is_del == 0)
    ).all()
    issued = [r for r in rows if r.status == "issued"]
    total_issued = sum(float(r.invoice_amount or 0) for r in issued)
    return success_response({
        "totalInvoicedAmount": total_issued,
        "invoiceCount": len(rows),
    })


@router.get("/invoices/available-orders", response_model=dict)
def invoices_available_orders(
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    """可申请开票的已完成订单（简化：已完成且尚无发票）"""
    orders, _ = order_crud.get_multi_with_filters(
        db, client_id=current_user.get("user_id"), status="completed", skip=0, limit=200
    )
    out = []
    for o in orders:
        inv = db.query(BizInvoice).filter(
            and_(BizInvoice.order_id == o.id, BizInvoice.is_del == 0)
        ).first()
        if inv:
            continue
        out.append({"orderId": o.id, "orderNo": o.order_no, "totalAmount": float(o.total_amount or 0)})
    return success_response({"list": out})


@router.get("/invoices/{invoice_id}", response_model=dict)
def get_client_invoice(
    invoice_id: str,
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    r = db.query(BizInvoice).filter(
        and_(BizInvoice.id == invoice_id, BizInvoice.client_id == current_user.get("user_id"), BizInvoice.is_del == 0)
    ).first()
    if not r:
        return error_response(404, "发票不存在")
    return success_response({
        "id": r.id,
        "invoiceNo": r.invoice_no,
        "orderId": r.order_id,
        "title": r.title,
        "invoiceAmount": float(r.invoice_amount) if r.invoice_amount else 0,
        "status": r.status,
        "invoiceUrl": r.invoice_url,
        "createAt": str(r.create_at) if r.create_at else None,
    })


@router.post("/invoices", response_model=dict)
def apply_invoice(
    request: dict,
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    """申请开票（简化）"""
    order_id = request.get("orderId")
    title = request.get("title") or ""
    invoice_type = request.get("invoiceType") or "normal"
    if not order_id:
        return error_response(400, "缺少 orderId")
    order = order_crud.get(db, order_id)
    if not order or order.client_id != current_user.get("user_id"):
        return error_response(404, "订单不存在")
    if order.status != "completed":
        return error_response(400, "仅已完成订单可申请开票")
    inv = BizInvoice(
        id=generate_id(),
        invoice_no=f"INV{datetime.now().strftime('%Y%m%d%H%M%S')}{random.randint(1000, 9999)}",
        order_id=order.id,
        order_no=order.order_no,
        client_id=order.client_id,
        client_name=current_user.get("real_name") or "",
        invoice_type=invoice_type,
        title=title or "个人",
        invoice_amount=order.total_amount,
        tax_rate=Decimal("0"),
        tax_amount=Decimal("0"),
        status="pending",
        create_by=current_user.get("user_id"),
        create_name=current_user.get("real_name"),
    )
    db.add(inv)
    db.commit()
    db.refresh(inv)
    return success_response({"id": inv.id, "invoiceNo": inv.invoice_no, "status": inv.status})


@router.get("/payment-config", response_model=dict)
def client_payment_config():
    """小程序支付配置（不含密钥）"""
    return success_response({
        "appId": settings.WXPAY_MINI_APPID,
        "enabled": bool(settings.WXPAY_MCHID and settings.WXPAY_MINI_APPID),
    })


@router.post("/orders/{order_id}/wechat-pay", response_model=dict)
async def mini_order_wechat_pay(
    order_id: str,
    request: dict,
    db: Session = Depends(get_db),
    current_user: dict = Depends(require_client),
):
    """调起微信支付参数（需 openid）"""
    from app.core.wechat_pay import get_wechat_pay_v2

    openid = request.get("openid")
    if not openid:
        return error_response(400, "缺少 openid")

    order = order_crud.get(db, order_id)
    if not order or order.client_id != current_user.get("user_id"):
        return error_response(404, "订单不存在")
    if getattr(order, "payment_method", None) != "online":
        return error_response(400, "线下支付订单无需微信支付")
    if order.status != "pending_payment":
        return error_response(400, "订单状态不允许支付")

    total_amount = int(float(order.total_amount) * 100)
    if total_amount <= 0:
        return error_response(400, "订单金额必须大于0")

    pay_client = get_wechat_pay_v2()
    result = pay_client.unified_order(
        out_trade_no=order.order_no,
        total_fee=total_amount,
        body="陇耘鲜达-订单支付",
        openid=openid,
        trade_type="JSAPI",
    )
    if result.get("success"):
        pp = result.get("pay_params") or {}
        _upsert_wechat_pay_pending(
            db,
            order_id=str(order.id),
            out_trade_no=order.order_no,
            total_fee=total_amount,
            operator_id=current_user.get("user_id"),
            operator_name=current_user.get("real_name"),
        )
        db.commit()
        return success_response({
            "orderId": order.id,
            "orderNo": order.order_no,
            "prepayId": result.get("prepay_id"),
            "appId": pp.get("appId"),
            "timeStamp": pp.get("timeStamp"),
            "nonceStr": pp.get("nonceStr"),
            "package": pp.get("package"),
            "signType": pp.get("signType"),
            "paySign": pp.get("paySign"),
        })
    return error_response(500, result.get("error", "创建支付失败"))