"""物料选择器 — 读 MOM material_base，按成品/半成品 category 手风琴分组"""
from fastapi import APIRouter, Query, HTTPException, status
from pydantic import BaseModel
from app.core.mom_database import MomSessionLocal
from sqlalchemy import text

router = APIRouter(prefix="/materials", tags=["物料选择"])

# 只展示成品 / 半成品（category 字段区分，如 IRIS/成品/… / IRIS/半成品/…）
TYPE_FILTER = "category ILIKE '%成品%' OR category ILIKE '%半成品%'"


# ============================================================
# 响应模型
# ============================================================

class MaterialGroup(BaseModel):
    category: str
    count: int


class MaterialItem(BaseModel):
    id: int
    name: str
    spec: str
    category: str
    type: str
    unit: str
    is_enabled: bool


# ============================================================
# 端点
# ============================================================

@router.get("/groups", response_model=list[MaterialGroup])
def get_material_groups(
    keyword: str = Query("", description="搜索（按名称/规格）"),
):
    """
    按 category 分组汇总，前端渲染手风琴外层。
    只返回成品/半成品分类。
    """
    db = MomSessionLocal()
    try:
        if keyword.strip():
            sql = text(
                f"""
                SELECT category, COUNT(*) AS count
                FROM material_base
                WHERE is_enabled = TRUE
                  AND ({TYPE_FILTER})
                  AND (name ILIKE :kw OR spec_model ILIKE :kw)
                GROUP BY category
                ORDER BY category
                """
            )
            result = db.execute(sql, {"kw": f"%{keyword.strip()}%"})
        else:
            sql = text(
                f"""
                SELECT category, COUNT(*) AS count
                FROM material_base
                WHERE is_enabled = TRUE
                  AND ({TYPE_FILTER})
                GROUP BY category
                ORDER BY category
                """
            )
            result = db.execute(sql)

        rows = result.fetchall()
        return [MaterialGroup(category=row.category, count=row.count) for row in rows]
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_502_BAD_GATEWAY,
            detail=f"MOM material_base 查询失败: {str(e)}",
        )
    finally:
        db.close()


@router.get("/items", response_model=list[MaterialItem])
def get_material_items(
    category: str = Query(..., description="物料分类"),
    keyword: str = Query("", description="分组内搜索"),
    limit: int = Query(500, ge=1, le=9999),
):
    """
    获取指定 category 下的物料条目，前端展开手风琴时懒加载。
    """
    db = MomSessionLocal()
    try:
        if keyword.strip():
            sql = text(
                f"""
                SELECT id, name, spec_model AS spec, category, material_type AS type,
                       COALESCE(unit, '') AS unit, is_enabled
                FROM material_base
                WHERE is_enabled = TRUE
                  AND ({TYPE_FILTER})
                  AND category = :cat
                  AND (name ILIKE :kw OR spec_model ILIKE :kw)
                ORDER BY name
                LIMIT :lim
                """
            )
            result = db.execute(
                sql, {"cat": category, "kw": f"%{keyword.strip()}%", "lim": limit}
            )
        else:
            sql = text(
                f"""
                SELECT id, name, spec_model AS spec, category, material_type AS type,
                       COALESCE(unit, '') AS unit, is_enabled
                FROM material_base
                WHERE is_enabled = TRUE
                  AND ({TYPE_FILTER})
                  AND category = :cat
                ORDER BY name
                LIMIT :lim
                """
            )
            result = db.execute(sql, {"cat": category, "lim": limit})

        rows = result.fetchall()
        return [
            MaterialItem(
                id=row.id,
                name=row.name,
                spec=row.spec,
                category=row.category,
                type=row.type,
                unit=row.unit,
                is_enabled=row.is_enabled,
            )
            for row in rows
        ]
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_502_BAD_GATEWAY,
            detail=f"MOM material_base 查询失败: {str(e)}",
        )
    finally:
        db.close()