// src/lib/items/repository.ts
import db from "@/db/db";
import { Item, items } from "@/db/schema/items";
import {
  eq,
  inArray,
  not,
  asc,
  desc,
  and,
  ilike,
  gte,
  lte,
  count,
  gt,
} from "drizzle-orm";
import { PgTransaction } from "drizzle-orm/pg-core";
export type NewItem = typeof items.$inferInsert

/**
 * 단건/복수 조회 시 공통으로 사용 가능한 SELECT 함수 예시
 *  - 트랜잭션(tx)을 받아서 사용하도록 구현
 */
export async function selectItems(
  tx: PgTransaction<any, any, any>,
  params: {
    where?: any; // drizzle-orm의 조건식 (and, eq...) 등
    orderBy?: (ReturnType<typeof asc> | ReturnType<typeof desc>)[];
    offset?: number;
    limit?: number;
  }
) {
  const { where, orderBy, offset = 0, limit = 10 } = params;

  return tx
    .select()
    .from(items)
    .where(where)
    .orderBy(...(orderBy ?? []))
    .offset(offset)
    .limit(limit);
}
/** 총 개수 count */
export async function countItems(
  tx: PgTransaction<any, any, any>,
  where?: any
) {
  const res = await tx.select({ count: count() }).from(items).where(where);
  return res[0]?.count ?? 0;
}

/** 단건 Insert 예시 */
export async function insertItem(
  tx: PgTransaction<any, any, any>,
  data: NewItem // DB와 동일한 insert 가능한 타입
) {
  // returning() 사용 시 배열로 돌아오므로 [0]만 리턴
  return tx
    .insert(items)
    .values(data)
    .returning({ id: items.id, createdAt: items.createdAt });
}

/** 복수 Insert 예시 */
export async function insertItems(
  tx: PgTransaction<any, any, any>,
  data: Item[]
) {
  return tx.insert(items).values(data).onConflictDoNothing();
}



/** 단건 삭제 */
export async function deleteItemById(
  tx: PgTransaction<any, any, any>,
  itemId: number
) {
  return tx.delete(items).where(eq(items.id, itemId));
}

/** 복수 삭제 */
export async function deleteItemsByIds(
  tx: PgTransaction<any, any, any>,
  ids: number[]
) {
  return tx.delete(items).where(inArray(items.id, ids));
}

/** 전체 삭제 */
export async function deleteAllItems(
  tx: PgTransaction<any, any, any>,
) {
  return tx.delete(items);
}

/** 단건 업데이트 */
export async function updateItem(
  tx: PgTransaction<any, any, any>,
  itemId: number,
  data: Partial<Item>
) {
  return tx
    .update(items)
    .set(data)
    .where(eq(items.id, itemId))
    .returning({ id: items.id, createdAt: items.createdAt });
}

/** 복수 업데이트 */
export async function updateItems(
  tx: PgTransaction<any, any, any>,
  ids: number[],
  data: Partial<Item>
) {
  return tx
    .update(items)
    .set(data)
    .where(inArray(items.id, ids))
    .returning({ id: items.id, createdAt: items.createdAt });
}

export async function findAllItems(): Promise<Item[]> {
  return db.select().from(items).orderBy(asc(items.itemCode));
}