generator client {
  provider = "prisma-client"
  output   = "../generated/prisma"
}

datasource db {
  provider = "mysql"
}

model Pet {
  id        Int      @id @default(autoincrement())
  name      String
  species   String
  userId    String
  
  posts     Post[]   // One pet can have many posts

  sentRequests     Friendship[] @relation("sentRequests")
  receivedRequests Friendship[] @relation("receivedRequests")
}

model Friendship {
  id           Int      @id @default(autoincrement())
  
  petId        Int
  friendId     Int

  pet          Pet      @relation("sentRequests", fields: [petId], references: [id])
  friend       Pet      @relation("receivedRequests", fields: [friendId], references: [id])

  accepted     Boolean  @default(false)
  createdAt    DateTime @default(now())

  // 3. Safety: A pet can't friend the same pet twice
  @@unique([petId, friendId])
}

model Post {
  id        Int      @id @default(autoincrement())
  content   String
  petId     Int      @map("pet_id") 
  pet       Pet      @relation(fields: [petId], references: [id])
}