// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

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

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

model User {
  id        String   @id @default(cuid())
  email     String   @unique
  username  String   @unique
  password  String
  name      String?
  phone     String?
  address   String?
  isAdmin   Boolean  @default(false)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
  
  orders    Order[]
  cartItems CartItem[]
  
  @@map("users")
}

model ComponentType {
  id          String @id @default(cuid())
  name        String @unique // CPU、内存、硬盘、主板、显卡、机箱
  description String?
  
  components  Component[]
  
  @@map("component_types")
}

model Component {
  id             String        @id @default(cuid())
  name           String
  brand          String
  model          String
  price          Float
  description    String?
  imageUrl       String?
  stock          Int           @default(0)
  specifications String? // JSON格式存储规格参数
  createdAt      DateTime      @default(now())
  updatedAt      DateTime      @updatedAt
  
  componentTypeId String
  componentType   ComponentType @relation(fields: [componentTypeId], references: [id])
  
  orderItems     OrderItem[]
  cartItems      CartItem[]
  
  @@map("components")
}

model Order {
  id          String      @id @default(cuid())
  orderNumber String      @unique
  totalAmount Float
  status      OrderStatus @default(PENDING)
  createdAt   DateTime    @default(now())
  updatedAt   DateTime    @updatedAt
  
  userId      String
  user        User        @relation(fields: [userId], references: [id])
  
  orderItems  OrderItem[]
  
  @@map("orders")
}

model OrderItem {
  id       String @id @default(cuid())
  quantity Int    @default(1)
  price    Float
  
  orderId     String
  order       Order     @relation(fields: [orderId], references: [id], onDelete: Cascade)
  
  componentId String
  component   Component @relation(fields: [componentId], references: [id])
  
  @@map("order_items")
}

model CartItem {
  id       String @id @default(cuid())
  quantity Int    @default(1)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
  
  userId      String
  user        User      @relation(fields: [userId], references: [id], onDelete: Cascade)
  
  componentId String
  component   Component @relation(fields: [componentId], references: [id], onDelete: Cascade)
  
  @@unique([userId, componentId]) // 一个用户对同一个商品只能有一条购物车记录
  @@map("cart_items")
}

enum OrderStatus {
  PENDING
  CONFIRMED
  PROCESSING
  SHIPPED
  DELIVERED
  CANCELLED
}