/**
 * 订单管理接口
 * 开发: 卡若
 * 技术支持: 存客宝
 *
 * GET /api/orders         - 管理后台：返回全部订单（无 userId）
 * GET /api/orders?userId= - 按用户返回订单
 */
import { type NextRequest, NextResponse } from "next/server"
import { query } from "@/lib/db"

function rowToOrder(row: Record<string, unknown>) {
  return {
    id: row.id,
    orderSn: row.order_sn,
    userId: row.user_id,
    openId: row.open_id,
    productType: row.product_type,
    productId: row.product_id,
    amount: parseFloat(row.amount as string) || 0,  // 确保是数字类型
    description: row.description,
    status: row.status,
    transactionId: row.transaction_id,
    payTime: row.pay_time,
    referrerId: row.referrer_id ?? null,
    referralCode: row.referral_code ?? null,
    createdAt: row.created_at,
    updatedAt: row.updated_at,
    // 新增：购买者信息
    userNickname: row.user_nickname ?? null,
    userAvatar: row.user_avatar ?? null,
    // 新增：章节信息
    bookName: '《底层逻辑》',  // 书名（固定）
    chapterTitle: row.chapter_title ?? null,  // 章标题
    sectionTitle: row.section_title ?? null,  // 节标题
  }
}

export async function GET(request: NextRequest) {
  try {
    const { searchParams } = new URL(request.url)
    const userId = searchParams.get("userId")

    let rows: Record<string, unknown>[] = []
    try {
      if (userId) {
        // 按用户查询订单（JOIN users 表获取用户信息 + chapters 表获取章节信息）
        rows = (await query(
          `SELECT 
             o.*, 
             u.nickname as user_nickname, 
             u.avatar as user_avatar,
             c.chapter_title,
             c.section_title
           FROM orders o
           LEFT JOIN users u ON o.user_id = u.id
           LEFT JOIN chapters c ON o.product_id = c.id AND o.product_type = 'section'
           WHERE o.user_id = ? 
           ORDER BY o.created_at DESC`,
          [userId]
        )) as Record<string, unknown>[]
      } else {
        // 管理后台：无 userId 时返回全部订单（JOIN users + chapters 表）
        rows = (await query(
          `SELECT 
             o.*, 
             u.nickname as user_nickname, 
             u.avatar as user_avatar,
             c.chapter_title,
             c.section_title
           FROM orders o
           LEFT JOIN users u ON o.user_id = u.id
           LEFT JOIN chapters c ON o.product_id = c.id AND o.product_type = 'section'
           ORDER BY o.created_at DESC`
        )) as Record<string, unknown>[]
      }
    } catch (e) {
      console.error("[Karuo] Orders query error:", e)
      // 表可能未初始化，返回空列表
      rows = []
    }

    const orders = rows.map(rowToOrder)

    return NextResponse.json({
      code: 0,
      message: "获取成功",
      data: orders,
      success: true,
      orders,
    })
  } catch (error) {
    console.error("[Karuo] Get orders error:", error)
    return NextResponse.json({ code: 500, message: "服务器错误" }, { status: 500 })
  }
}