// 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"
  previewFeatures = ["postgresqlExtensions"]
}

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

// ================================
// Enums
// ================================

enum ProjectStatus {
  ACTIVE
  ARCHIVED
}

enum LinkType {
  WEBSITE
  GITHUB
  HUGGINGFACE
  PAPER
}

enum TaskStatus {
  PENDING
  IN_PROGRESS
  COMPLETED
  FAILED
}

// ================================
// Models
// ================================

model Project {
  id             String        @id @default(cuid())
  name           String
  nameEn         String?
  slug           String        @unique
  description    String
  descriptionEn  String?
  content        String?       @db.Text
  contentEn      String?       @db.Text
  status         ProjectStatus @default(ACTIVE)
  source         String?
  createdAt      DateTime      @default(now())
  updatedAt      DateTime      @updatedAt

  // Relations
  tags           ProjectTag[]
  links          ExternalLink[]
  discoveryTasks ProjectDiscoveryTask[]

  // Indexes
  @@index([status, createdAt], map: "idx_project_status_createdAt")
  @@index([slug], map: "idx_project_slug")
  @@map("projects")
}

model Tag {
  id        String      @id @default(cuid())
  name      String      @unique
  nameEn    String?
  slug      String      @unique
  createdAt DateTime    @default(now())

  // Relations
  projects  ProjectTag[]

  // Indexes
  @@index([slug], map: "idx_tag_slug")
  @@map("tags")
}

model ExternalLink {
  id        String   @id @default(cuid())
  type      LinkType
  url       String
  title     String?
  projectId String

  // Relations
  project   Project  @relation(fields: [projectId], references: [id], onDelete: Cascade)

  // Indexes
  @@index([projectId], map: "idx_link_projectId")
  @@index([type], map: "idx_link_type")
  @@index([url], map: "idx_link_url")
  @@index([type, url], map: "idx_link_type_url")
  @@unique([projectId, url])
  @@map("external_links")
}

// Project-Tag many-to-many relationship table
model ProjectTag {
  projectId String
  tagId     String

  project   Project @relation(fields: [projectId], references: [id], onDelete: Cascade)
  tag       Tag     @relation(fields: [tagId], references: [id], onDelete: Cascade)

  @@id([projectId, tagId])
  @@index([tagId])
  @@map("project_tags")
}

// Project Discovery Task model
model ProjectDiscoveryTask {
  id                  String     @id @default(cuid())
  status              TaskStatus @default(PENDING)

  // 原始数据（仅URL）
  sourceUrl           String
  sourceType          String     @default("manual")

  // 探索结果
  explorationData     Json?
  explorationSummary  String?    @db.Text

  // 错误处理
  errorMessage        String?    @db.Text
  retryCount          Int        @default(0)
  lastRetryAt         DateTime?

  // 关联
  projectId           String?
  project             Project?   @relation(fields: [projectId], references: [id])

  // 时间戳
  createdAt           DateTime   @default(now())
  startedAt           DateTime?
  completedAt         DateTime?
  updatedAt           DateTime   @updatedAt

  // 索引
  @@index([status, createdAt], map: "idx_task_status_created")
  @@index([sourceUrl], map: "idx_task_source_url")
  @@index([projectId], map: "idx_task_project_id")
  @@map("project_discovery_tasks")
}