/**
 * Prisma 辅助函数库
 * 提供常用的数据库操作封装
 */

import { prisma } from '@/lib/prisma'

/**
 * 读取系统配置
 */
export async function getPrismaConfig(key: string): Promise<any> {
  try {
    const config = await prisma.system_config.findUnique({
      where: { config_key: key }
    })
    return config?.config_value
  } catch (e) {
    console.warn(`[Config] 读取配置 ${key} 失败:`, e)
    return null
  }
}

/**
 * 更新系统配置
 */
export async function setPrismaConfig(key: string, value: any, description?: string): Promise<void> {
  await prisma.system_config.upsert({
    where: { config_key: key },
    update: {
      config_value: value,
      description: description || null,
      updated_at: new Date()
    },
    create: {
      config_key: key,
      config_value: value,
      description: description || null
    }
  })
}

/**
 * 查询用户（通过 ID 或 openId）
 */
export async function findUserByIdOrOpenId(userId?: string, openId?: string) {
  if (!userId && !openId) return null
  
  return await prisma.users.findFirst({
    where: userId ? { id: userId } : { open_id: openId }
  })
}

/**
 * 批量查询用户
 */
export async function findUsersByIds(userIds: string[]) {
  return await prisma.users.findMany({
    where: { id: { in: userIds } }
  })
}

/**
 * 记录用户追踪
 */
export async function trackUserAction(
  userId: string,
  action: string,
  chapterId?: string,
  target?: string,
  extraData?: any
) {
  try {
    await prisma.user_tracks.create({
      data: {
        id: `track_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`,
        user_id: userId,
        action,
        chapter_id: chapterId || null,
        target: target || null,
        extra_data: extraData || null
      }
    })
  } catch (e) {
    console.error('[Track] 记录失败:', e)
  }
}

/**
 * 检查用户是否购买章节
 */
export async function hasUserPurchasedChapter(userId: string, chapterId: string): Promise<boolean> {
  const user = await prisma.users.findUnique({
    where: { id: userId },
    select: { has_full_book: true, purchased_sections: true }
  })
  
  if (!user) return false
  if (user.has_full_book) return true
  
  const purchasedSections = user.purchased_sections as any
  if (Array.isArray(purchasedSections)) {
    return purchasedSections.includes(chapterId)
  }
  
  return false
}

/**
 * 获取用户购买的章节列表
 */
export async function getUserPurchasedChapters(userId: string): Promise<string[]> {
  const user = await prisma.users.findUnique({
    where: { id: userId },
    select: { purchased_sections: true }
  })
  
  const sections = user?.purchased_sections as any
  return Array.isArray(sections) ? sections : []
}

/**
 * 添加用户购买的章节
 */
export async function addUserPurchasedChapter(userId: string, chapterId: string): Promise<void> {
  const user = await prisma.users.findUnique({
    where: { id: userId },
    select: { purchased_sections: true }
  })
  
  const sections = user?.purchased_sections as any
  const purchased = Array.isArray(sections) ? sections : []
  
  if (!purchased.includes(chapterId)) {
    purchased.push(chapterId)
    await prisma.users.update({
      where: { id: userId },
      data: { purchased_sections: purchased }
    })
  }
}