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

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

model Pipeline {
  id            String   @id @db.VarChar(26) // ULID
  projectName   String   @db.VarChar(255)
  requirements  String   @db.Text
  currentState  String   @db.VarChar(50) @default("idle")
  contextJson   String   @db.LongText
  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt

  transitions   StateTransition[]
  actorSpawns   ActorSpawn[]
  contracts     Contract[]
  escalations   Escalation[]
  subTasks      SubTask[]

  @@index([currentState])
  @@index([createdAt])
  @@map("pipelines")
}

model StateTransition {
  id           Int      @id @default(autoincrement())
  pipelineId   String   @db.VarChar(26)
  fromState    String   @db.VarChar(50)
  toState      String   @db.VarChar(50)
  eventType    String   @db.VarChar(50)
  eventPayload String   @db.LongText
  timestamp    DateTime @default(now())

  pipeline     Pipeline @relation(fields: [pipelineId], references: [id], onDelete: Cascade)

  @@index([pipelineId, timestamp])
  @@index([eventType])
  @@map("state_transitions")
}

model ActorSpawn {
  id         Int       @id @default(autoincrement())
  pipelineId String    @db.VarChar(26)
  actorName  String    @db.VarChar(100)
  stage      String    @db.VarChar(50)
  spawnedAt  DateTime  @default(now())
  exitCode   Int?
  exitedAt   DateTime?
  resultJson String?   @db.LongText

  pipeline   Pipeline  @relation(fields: [pipelineId], references: [id], onDelete: Cascade)

  @@index([pipelineId, spawnedAt])
  @@map("actor_spawns")
}

model Contract {
  id         String    @id @db.VarChar(26) // ULID
  pipelineId String    @db.VarChar(26)
  sprintId   String    @db.VarChar(100)
  version    String    @db.VarChar(20) @default("v1")
  bodyJson   String    @db.LongText
  frozenAt   DateTime?
  createdAt  DateTime  @default(now())

  pipeline   Pipeline  @relation(fields: [pipelineId], references: [id], onDelete: Cascade)

  @@index([pipelineId])
  @@index([sprintId])
  @@map("contracts")
}

model SubTask {
  id               String         @id @db.VarChar(26)
  pipelineId       String         @db.VarChar(26)
  parentId         String?        @db.VarChar(26)
  role             String         @db.VarChar(30)
  agentName        String         @db.VarChar(50)
  title            String         @db.VarChar(500)
  description      String         @db.Text
  state            String         @db.VarChar(30) @default("queued")
  complexityScore  Int?
  complexityTier   String?        @db.VarChar(20)
  model            String         @db.VarChar(50) @default("")
  resultJson       String?        @db.LongText
  errorReason      String?        @db.Text
  startedAt        DateTime?
  completedAt      DateTime?
  createdAt        DateTime       @default(now())

  pipeline         Pipeline       @relation(fields: [pipelineId], references: [id], onDelete: Cascade)
  parent           SubTask?       @relation("SubTaskHierarchy", fields: [parentId], references: [id], onDelete: NoAction, onUpdate: NoAction)
  children         SubTask[]      @relation("SubTaskHierarchy")
  events           SubTaskEvent[]

  @@index([pipelineId, parentId])
  @@index([state])
  @@index([agentName, state])
  @@map("sub_tasks")
}

model SubTaskEvent {
  id           Int       @id @default(autoincrement())
  subTaskId    String    @db.VarChar(26)
  eventType    String    @db.VarChar(50)
  payloadJson  String    @db.LongText
  timestamp    DateTime  @default(now())

  subTask      SubTask   @relation(fields: [subTaskId], references: [id], onDelete: Cascade)

  @@index([subTaskId, timestamp])
  @@index([eventType])
  @@map("sub_task_events")
}

model Escalation {
  id               String   @id @db.VarChar(26) // ULID
  pipelineId       String   @db.VarChar(26)
  reason           String   @db.VarChar(500)
  errorCategory    String   @db.VarChar(50)
  stage            String   @db.VarChar(50) @default("")
  attempts         Int      @default(0)
  contextSnapshot  String   @db.LongText
  resolvedAt       DateTime?
  resolution       String?  @db.VarChar(50)
  createdAt        DateTime @default(now())

  pipeline         Pipeline @relation(fields: [pipelineId], references: [id], onDelete: Cascade)

  @@index([pipelineId])
  @@index([createdAt])
  @@map("escalations")
}