// 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"
  output   = "../src/generated/prisma"
}

datasource db {
  provider = "sqlite"
  url      = "file:./dev.db"
}

// URLs table - Each comparison page has its own URL
model Url {
  id        Int      @id @default(autoincrement())
  url       String   @unique
  createdAt DateTime @default(now()) @map("created_at")

  // Relations
  items              Item[]
  selectedProperties SelectedProperty[]
  deletedProperties  DeletedProperty[]

  @@map("urls")
}

// Properties table - All available properties (core + custom)
model Property {
  id               Int @id @default(autoincrement())
  name             String @unique
  globalUsageCount Int @default(0) @map("global_usage_count")

  // Relations
  itemProperties     ItemProperty[]
  selectedProperties SelectedProperty[]
  deletedProperties  DeletedProperty[]

  @@map("properties")
}

// Items table - Individual items that can appear in multiple URLs
model Item {
  id           String  @id
  urlId        Int     @map("url_id")
  wikidataId   String? @map("wikidata_id")
  itemOrder    Int     @default(0) @map("item_order")
  globalItemId String  @unique @map("global_item_id")

  // Relations
  url               Url               @relation(fields: [urlId], references: [id], onDelete: Cascade)
  itemProperties    ItemProperty[]    @relation("ItemToItemProperty")
  deletedProperties DeletedProperty[]

  @@map("items")
}

// Junction table for item properties (including core properties like name, description)
model ItemProperty {
  globalItemId String @map("global_item_id")
  propertyId   Int    @map("property_id")
  value        String

  // Relations
  item     Item     @relation("ItemToItemProperty", fields: [globalItemId], references: [globalItemId], onDelete: Cascade)
  property Property @relation(fields: [propertyId], references: [id], onDelete: Cascade)

  @@id([globalItemId, propertyId])
  @@map("item_properties")
}

// Selected properties for each URL (excludes core properties)
model SelectedProperty {
  urlId      Int @map("url_id")
  propertyId Int @map("property_id")

  // Relations
  url      Url      @relation(fields: [urlId], references: [id], onDelete: Cascade)
  property Property @relation(fields: [propertyId], references: [id], onDelete: Cascade)

  @@id([urlId, propertyId])
  @@map("selected_properties")
}

// Soft delete tracking for properties per URL
model DeletedProperty {
  urlId        Int    @map("url_id")
  globalItemId String @map("global_item_id")
  propertyId   Int    @map("property_id")

  // Relations
  url      Url      @relation(fields: [urlId], references: [id], onDelete: Cascade)
  item     Item     @relation(fields: [globalItemId], references: [globalItemId], onDelete: Cascade)
  property Property @relation(fields: [propertyId], references: [id], onDelete: Cascade)

  @@id([urlId, globalItemId, propertyId])
  @@map("deleted_properties")
}