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

// Looking for ways to speed up your queries, or scale easily with your serverless or edge functions?
// Try Prisma Accelerate: https://pris.ly/cli/accelerate-init

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

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

model Person {
  id        String   @id @default(uuid())
  name      String
  company   String?
  role      String?
  email     String?
  location  String?
  sectors   String[] @default([])
  interests String[] @default([])
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  // Relations (undirected connections modeled as two directed FKs)
  connectionsA Connection[] @relation("ConnectionsA")
  connectionsB Connection[] @relation("ConnectionsB")

  @@index([name])
}

model Connection {
  id                String   @id @default(uuid())
  personAId         String
  personBId         String
  personA           Person   @relation("ConnectionsA", fields: [personAId], references: [id], onDelete: Cascade)
  personB           Person   @relation("ConnectionsB", fields: [personBId], references: [id], onDelete: Cascade)
  introducedByChain String[] @default([])
  eventLabels       String[] @default([])
  notes             String?
  createdAt         DateTime @default(now())

  @@index([personAId])
  @@index([personBId])
  // Uniqueness of undirected pair (A,B) and self-edge prevention enforced via SQL migration with
  // a functional unique index on (LEAST(personAId, personBId), GREATEST(personAId, personBId))
  // and a CHECK (personAId <> personBId).
}