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

datasource db {
  provider = "postgresql"
}

model User {
  id        String   @id @default(cuid())
  mobile    String   @unique
  nickname  String?
  avatarUrl String?
  points    Int      @default(0)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  carts     CartItem[]
  orders    Order[]
}

model Product {
  id          String   @id @default(cuid())
  name        String
  description String?
  detail      String?
  price       Decimal  @db.Decimal(10, 2)
  imageUrl    String?
  category    String?
  tag         String?
  stock       Int      @default(0)
  enabled     Boolean  @default(true)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  carts       CartItem[]
  orderItems  OrderItem[]
}

model CartItem {
  id        String   @id @default(cuid())
  userId    String
  productId String
  skuText   String?
  quantity  Int      @default(1)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  product   Product  @relation(fields: [productId], references: [id], onDelete: Cascade)

  @@unique([userId, productId, skuText])
}

model Order {
  id          String      @id @default(cuid())
  orderNo     String      @unique
  userId      String
  status      OrderStatus @default(PENDING_PAYMENT)
  totalAmount Decimal     @db.Decimal(10, 2)
  payType     PayType?
  paidAt      DateTime?
  createdAt   DateTime    @default(now())
  updatedAt   DateTime    @updatedAt

  user        User        @relation(fields: [userId], references: [id], onDelete: Cascade)
  items       OrderItem[]
}

model OrderItem {
  id        String  @id @default(cuid())
  orderId   String
  productId String
  name      String
  imageUrl  String?
  skuText   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])
}

enum OrderStatus {
  PENDING_PAYMENT
  PAID
  SHIPPED
  COMPLETED
  CANCELLED
}

enum PayType {
  POINTS
  WECHAT
  ALIPAY
}