wxmp_backend/prisma/schema.prisma

// 微信小程序后端 — Prisma schema
// 数据库：PostgreSQL

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "postgresql"
  url      = env("DATABASE_URL")
}

// ── 用户 ──────────────────────────────────────────────
model User {
  id        String   @id @default(cuid())
  // 微信 openid：登录判定主键。首次登录验证手机号注册，后续登录 openid 在库即放行
  openid    String   @unique
  // 插件用户标识（当前未用插件，保留可空以兼容未来）
  openpid   String?  @unique
  unionid   String?
  nickname  String?
  avatar    String?
  phone     String?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  orders         Order[]
  addresses      Address[]
  designLists    DesignList[]
  uploads        Upload[]
  customizations CustomizationTask[]

  @@index([phone])
}

// ── 商品分类 ──────────────────────────────────────────
model Category {
  id       String     @id @default(cuid())
  name     String
  parentId String?
  sort     Int        @default(0)
  parent   Category?  @relation("CategoryTree", fields: [parentId], references: [id])
  children Category[] @relation("CategoryTree")
  products Product[]

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([parentId])
}

// ── 商品 ──────────────────────────────────────────────
model Product {
  id          String          @id @default(cuid())
  name        String
  categoryId  String?
  price       Decimal         @db.Decimal(10, 2)
  images      String[]
  description String?
  status      ProductStatus   @default(DRAFT)
  category    Category?       @relation(fields: [categoryId], references: [id])
  orderItems  OrderItem[]

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([categoryId])
  @@index([status])
}

enum ProductStatus {
  DRAFT
  ON_SALE
  OFF_SHELF
}

// ── 设计清单 / 定制需求 ───────────────────────────────
model DesignList {
  id     String           @id @default(cuid())
  userId String
  title  String
  items  Json
  status DesignListStatus @default(DRAFT)
  user   User             @relation(fields: [userId], references: [id])

  customizations CustomizationTask[]

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([userId])
}

enum DesignListStatus {
  DRAFT
  SUBMITTED
  PROCESSING
  DONE
}

// ── 收货地址 ──────────────────────────────────────────
model Address {
  id        String   @id @default(cuid())
  userId    String
  name      String
  phone     String
  province  String
  city      String
  district  String
  detail    String
  isDefault Boolean  @default(false)
  user      User     @relation(fields: [userId], references: [id])

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([userId])
}

// ── 订单 ──────────────────────────────────────────────
model Order {
  id             String       @id @default(cuid())
  orderNo        String       @unique
  userId         String
  status         OrderStatus  @default(PENDING)
  totalAmount    Decimal      @db.Decimal(10, 2)
  addressSnapshot Json
  user           User         @relation(fields: [userId], references: [id])
  items          OrderItem[]
  payment        Payment?

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([userId])
  @@index([status])
}

enum OrderStatus {
  PENDING
  PAID
  PROCESSING
  SHIPPED
  COMPLETED
  CANCELLED
}

model OrderItem {
  id        String  @id @default(cuid())
  orderId   String
  productId String?
  name      String
  price     Decimal @db.Decimal(10, 2)
  quantity  Int
  order     Order   @relation(fields: [orderId], references: [id], onDelete: Cascade)
  product   Product? @relation(fields: [productId], references: [id])

  @@index([orderId])
}

// ── 支付 ──────────────────────────────────────────────
model Payment {
  id             String         @id @default(cuid())
  orderId        String         @unique
  transactionId  String?
  provider       PaymentProvider @default(WECHAT)
  status         PaymentStatus  @default(PENDING)
  paidAt         DateTime?
  order          Order          @relation(fields: [orderId], references: [id])

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}

enum PaymentProvider {
  WECHAT
}

enum PaymentStatus {
  PENDING
  SUCCESS
  REFUNDED
}

// ── 文件上传 ──────────────────────────────────────────
model Upload {
  id        String   @id @default(cuid())
  userId    String
  cosKey    String
  url       String
  mimetype  String?
  size      Int?
  user      User     @relation(fields: [userId], references: [id])

  createdAt DateTime @default(now())

  @@index([userId])
}

// ── 异步定制任务 ──────────────────────────────────────
model CustomizationTask {
  id           String                  @id @default(cuid())
  designListId String?
  userId       String?
  status       CustomizationTaskStatus @default(PENDING)
  resultUrl    String?
  queueJobId   String?
  designList   DesignList?             @relation(fields: [designListId], references: [id])
  user         User?                   @relation(fields: [userId], references: [id])

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([designListId])
  @@index([status])
}

enum CustomizationTaskStatus {
  PENDING
  RUNNING
  SUCCESS
  FAILED
}