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

// Get a free hosted Postgres database in seconds: `npx create-db`

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

datasource db {
  provider = "sqlite"
}

// A physical location in the building (e.g., "Serverraum", "Wohnzimmer")
model Location {
  id          Int     @id @default(autoincrement())
  name        String
  description String? // Optional Markdown text

  // A location can be the start OR end of many cables
  startCables Cable[] @relation("StartLocation")
  endCables   Cable[] @relation("EndLocation")
  cableStops  CableStop[]
}

// A single cable run documented in the system
model Cable {
  id          Int      @id @default(autoincrement())
  identifier  String   // e.g. "Kabel 01", "LAN-01"
  description String?  // Short plain-text summary
  notes       String?  // Long-form Markdown notes
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  startLocationId Int
  endLocationId   Int

  startLocation Location @relation("StartLocation", fields: [startLocationId], references: [id])
  endLocation   Location @relation("EndLocation", fields: [endLocationId], references: [id])

  cores Core[] // One cable can have many cores/wires
  intermediateStops CableStop[]
}

// A single wire/core within a cable (e.g., "Blau", "Rot/Weiß")
model Core {
  id    Int     @id @default(autoincrement())
  color String  // Color designation, e.g. "Blau", "Braun/Weiß"
  notes String? // Optional Markdown notes

  cableId Int
  cable   Cable @relation(fields: [cableId], references: [id], onDelete: Cascade)
}

model CableStop {
  id         Int      @id @default(autoincrement())
  order      Int
  cable      Cable    @relation(fields: [cableId], references: [id], onDelete: Cascade)
  cableId    Int
  location   Location @relation(fields: [locationId], references: [id])
  locationId Int

  @@unique([cableId, order])
}