// 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 = "sqlite"
}

model User {
  id            String         @id @default(cuid())
  email         String         @unique
  name          String?
  password      String
  sessions      Session[]
  sharedSessions SessionShare[]
  sessionEvents SessionEvent[]
  createdAt     DateTime       @default(now())
  updatedAt     DateTime       @updatedAt
}

model Session {
  id           String         @id @default(cuid())
  title        String
  collaborator String
  date         DateTime       @default(now())
  userId       String
  user         User           @relation(fields: [userId], references: [id], onDelete: Cascade)
  items        SwotItem[]
  actions      Action[]
  shares       SessionShare[]
  events       SessionEvent[]
  createdAt    DateTime       @default(now())
  updatedAt    DateTime       @updatedAt

  @@index([userId])
}

enum SwotCategory {
  STRENGTH
  WEAKNESS
  OPPORTUNITY
  THREAT
}

model SwotItem {
  id          String       @id @default(cuid())
  content     String
  category    SwotCategory
  order       Int          @default(0)
  sessionId   String
  session     Session      @relation(fields: [sessionId], references: [id], onDelete: Cascade)
  actionLinks ActionLink[]
  createdAt   DateTime     @default(now())
  updatedAt   DateTime     @updatedAt

  @@index([sessionId])
}

model Action {
  id          String       @id @default(cuid())
  title       String
  description String?
  priority    Int          @default(0)
  status      String       @default("todo")
  dueDate     DateTime?
  sessionId   String
  session     Session      @relation(fields: [sessionId], references: [id], onDelete: Cascade)
  links       ActionLink[]
  createdAt   DateTime     @default(now())
  updatedAt   DateTime     @updatedAt

  @@index([sessionId])
}

model ActionLink {
  id         String   @id @default(cuid())
  actionId   String
  action     Action   @relation(fields: [actionId], references: [id], onDelete: Cascade)
  swotItemId String
  swotItem   SwotItem @relation(fields: [swotItemId], references: [id], onDelete: Cascade)

  @@unique([actionId, swotItemId])
  @@index([actionId])
  @@index([swotItemId])
}

// ============================================
// Collaboration & Real-time
// ============================================

enum ShareRole {
  VIEWER
  EDITOR
}

model SessionShare {
  id        String    @id @default(cuid())
  sessionId String
  session   Session   @relation(fields: [sessionId], references: [id], onDelete: Cascade)
  userId    String
  user      User      @relation(fields: [userId], references: [id], onDelete: Cascade)
  role      ShareRole @default(EDITOR)
  createdAt DateTime  @default(now())

  @@unique([sessionId, userId])
  @@index([sessionId])
  @@index([userId])
}

model SessionEvent {
  id        String   @id @default(cuid())
  sessionId String
  session   Session  @relation(fields: [sessionId], references: [id], onDelete: Cascade)
  userId    String
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  type      String   // ITEM_CREATED, ITEM_UPDATED, ITEM_DELETED, ACTION_CREATED, etc.
  payload   String   // JSON payload
  createdAt DateTime @default(now())

  @@index([sessionId, createdAt])
}