ai-learning-platform/backend/prisma/schema.prisma

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

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

enum UserStatus {
  ACTIVE
  INACTIVE
  BANNED
}

enum ContentStatus {
  DRAFT
  PUBLISHED
  ARCHIVED
}

enum OrderStatus {
  PENDING
  PAID
  CANCELLED
  REFUNDED
}

enum MemberPlan {
  FREE
  MONTHLY
  YEARLY
}

model User {
  id           Int        @id @default(autoincrement())
  phone        String?    @unique
  email        String?    @unique
  passwordHash String?
  nickname     String?
  avatar       String?
  bio          String?
  status       UserStatus @default(ACTIVE)
  memberPlan   MemberPlan @default(FREE)
  memberExpire DateTime?
  sandboxDaily Int        @default(10)
  followerCount Int       @default(0)
  followingCount Int      @default(0)
  postCount     Int       @default(0)
  lastLoginAt  DateTime?
  createdAt    DateTime   @default(now())
  updatedAt    DateTime   @updatedAt
  deletedAt    DateTime?

  learnRecords    LearnRecord[]
  promptFavorites PromptFavorite[]
  prompts         Prompt[]
  sandboxSessions SandboxSession[]
  orders          Order[]
  subscriptions   Subscription[]
  posts           Post[]
  comments        Comment[]
  postLikes       PostLike[]
  followers       Follow[]     @relation("Following")
  following       Follow[]     @relation("Follower")
  createdCircles  Circle[]     @relation("CircleCreator")
  circleMemberships CircleMember[]
  organizationMemberships OrganizationMember[]
  notifications Notification[]

  @@map("users")
}

model Category {
  id          Int      @id @default(autoincrement())
  name        String
  slug        String   @unique
  description String?
  sortOrder   Int      @default(0)
  parentId    Int?
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  parent   Category?  @relation("CategoryTree", fields: [parentId], references: [id])
  children Category[] @relation("CategoryTree")

  courses  Course[]
  prompts  Prompt[]
  contents Content[]
  tools    Tool[]

  @@map("categories")
}

model Course {
  id          Int           @id @default(autoincrement())
  title       String
  description String?
  cover       String?
  categoryId  Int?
  price       Float         @default(0)
  isFree      Boolean       @default(true)
  status      ContentStatus @default(DRAFT)
  sortOrder   Int           @default(0)
  createdAt   DateTime      @default(now())
  updatedAt   DateTime      @updatedAt
  deletedAt   DateTime?

  category Category?     @relation(fields: [categoryId], references: [id])
  chapters Chapter[]
  progress LearnRecord[]
  assignments CourseAssignment[]

  @@map("courses")
}

model Chapter {
  id        Int      @id @default(autoincrement())
  courseId  Int
  title     String
  sortOrder Int      @default(0)
  createdAt DateTime @default(now())

  course  Course   @relation(fields: [courseId], references: [id], onDelete: Cascade)
  lessons Lesson[]

  @@map("chapters")
}

model Lesson {
  id        Int           @id @default(autoincrement())
  chapterId Int
  title     String
  content   String?
  videoUrl  String?
  duration  Int?
  sortOrder Int           @default(0)
  status    ContentStatus @default(DRAFT)
  createdAt DateTime      @default(now())
  updatedAt DateTime      @updatedAt

  chapter  Chapter       @relation(fields: [chapterId], references: [id], onDelete: Cascade)
  progress LearnRecord[]

  @@map("lessons")
}

model LearnRecord {
  id        Int      @id @default(autoincrement())
  userId    Int
  courseId  Int
  lessonId  Int
  completed Boolean  @default(false)
  progress  Float    @default(0)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
  course Course @relation(fields: [courseId], references: [id], onDelete: Cascade)
  lesson Lesson @relation(fields: [lessonId], references: [id], onDelete: Cascade)

  @@unique([userId, lessonId])
  @@map("learn_records")
}

model Prompt {
  id          Int           @id @default(autoincrement())
  title       String
  content     String
  description String?
  categoryId  Int?
  tags        String?
  authorId    Int?
  model       String?
  isPublic    Boolean       @default(true)
  status      ContentStatus @default(PUBLISHED)
  viewCount   Int           @default(0)
  likeCount   Int           @default(0)
  createdAt   DateTime      @default(now())
  updatedAt   DateTime      @updatedAt
  deletedAt   DateTime?

  category  Category?        @relation(fields: [categoryId], references: [id])
  author    User?            @relation(fields: [authorId], references: [id])
  favorites PromptFavorite[]

  @@map("prompts")
}

model PromptFavorite {
  id        Int      @id @default(autoincrement())
  userId    Int
  promptId  Int
  createdAt DateTime @default(now())

  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
  prompt Prompt @relation(fields: [promptId], references: [id], onDelete: Cascade)

  @@unique([userId, promptId])
  @@map("prompt_favorites")
}

model Tool {
  id          Int           @id @default(autoincrement())
  name        String
  description String?
  url         String
  icon        String?
  categoryId  Int?
  tags        String?
  isFeatured  Boolean       @default(false)
  status      ContentStatus @default(PUBLISHED)
  viewCount   Int           @default(0)
  createdAt   DateTime      @default(now())
  updatedAt   DateTime      @updatedAt
  deletedAt   DateTime?

  category Category? @relation(fields: [categoryId], references: [id])

  @@map("tools")
}

model Content {
  id            Int           @id @default(autoincrement())
  title         String
  summary       String?
  content       String?
  cover         String?
  categoryId    Int?
  tags          String?
  authorName    String?
  contentType   String        @default("article")
  status        ContentStatus @default(DRAFT)
  viewCount     Int           @default(0)
  isAiGenerated Boolean       @default(false)
  publishedAt   DateTime?
  createdAt     DateTime      @default(now())
  updatedAt     DateTime      @updatedAt
  deletedAt     DateTime?

  category Category? @relation(fields: [categoryId], references: [id])

  @@map("contents")
}

model AiModel {
  id            Int      @id @default(autoincrement())
  name          String
  provider      String
  description   String?
  capabilities  String?
  contextWindow Int?
  maxTokens     Int?
  pricing       String?
  isFree        Boolean  @default(false)
  isFeatured    Boolean  @default(false)
  icon          String?
  sortOrder     Int      @default(0)
  status        String   @default("ACTIVE")
  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt

  @@map("ai_models")
}

model Skill {
  id             String   @id
  name           String
  description    String
  icon           String
  category       String
  difficulty     String
  systemPrompt   String   @db.Text
  starters       String   @db.Text
  tasks          String   @db.Text
  tags           String
  prerequisiteIds String?
  sortOrder      Int      @default(0)
  status         String   @default("ACTIVE")
  createdAt      DateTime @default(now())
  updatedAt      DateTime @updatedAt

  @@map("skills")
}

model SandboxSession {
  id             Int      @id @default(autoincrement())
  userId         Int
  conversationId String   @default("")
  model          String
  title          String   @default("AI 对话")
  messages       String  @db.Text
  feedback       String?
  tokens         Int      @default(0)
  duration       Int      @default(0)
  createdAt      DateTime @default(now())

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([userId, conversationId])
  @@index([userId, createdAt])
  @@map("sandbox_sessions")
}

model Order {
  id         Int         @id @default(autoincrement())
  orderNo    String      @unique
  userId     Int
  amount     Float
  planType   String
  status     OrderStatus @default(PENDING)
  payChannel String?
  paidAt     DateTime?
  createdAt  DateTime    @default(now())
  updatedAt  DateTime    @updatedAt

  user User @relation(fields: [userId], references: [id])

  @@index([userId, status])
  @@index([status, createdAt])
  @@map("orders")
}

model Subscription {
  id        Int        @id @default(autoincrement())
  userId    Int
  plan      MemberPlan
  startDate DateTime
  endDate   DateTime
  status    String     @default("ACTIVE")
  createdAt DateTime   @default(now())
  updatedAt DateTime   @updatedAt

  user User @relation(fields: [userId], references: [id])

  @@index([userId, status])
  @@map("subscriptions")
}

model AdminUser {
  id           Int       @id @default(autoincrement())
  username     String    @unique
  passwordHash String
  nickname     String?
  role         String    @default("editor")
  status       String    @default("ACTIVE")
  lastLoginAt  DateTime?
  createdAt    DateTime  @default(now())
  updatedAt    DateTime  @updatedAt

  @@map("admin_users")
}

model AdminLog {
  id        Int      @id @default(autoincrement())
  adminId   Int
  action    String
  target    String?
  detail    String?
  ip        String?
  createdAt DateTime @default(now())

  @@map("admin_logs")
}

model Post {
  id           Int      @id @default(autoincrement())
  userId       Int
  title        String
  content      String
  tags         String?
  circleId     Int?
  status       String   @default("PUBLISHED")
  viewCount    Int      @default(0)
  likeCount    Int      @default(0)
  commentCount Int      @default(0)
  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt

  user     User       @relation(fields: [userId], references: [id], onDelete: Cascade)
  comments Comment[]
  likes    PostLike[]
  circle   Circle?    @relation(fields: [circleId], references: [id])

  @@index([userId])
  @@index([status, createdAt])
  @@index([circleId])
  @@map("posts")
}

model Comment {
  id        Int       @id @default(autoincrement())
  postId    Int
  userId    Int
  content   String
  parentId  Int?
  status    String    @default("PUBLISHED")
  reviewNote String?
  reviewedAt DateTime?
  createdAt DateTime  @default(now())

  post     Post      @relation(fields: [postId], references: [id], onDelete: Cascade)
  user     User      @relation(fields: [userId], references: [id], onDelete: Cascade)
  parent   Comment?  @relation("CommentReply", fields: [parentId], references: [id])
  replies  Comment[] @relation("CommentReply")

  @@index([postId])
  @@index([status])
  @@map("comments")
}

model PostLike {
  id     Int  @id @default(autoincrement())
  postId Int
  userId Int
  createdAt DateTime @default(now())

  post Post @relation(fields: [postId], references: [id], onDelete: Cascade)
  user User @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([postId, userId])
  @@map("post_likes")
}

model Circle {
  id          Int      @id @default(autoincrement())
  name        String
  description String?
  tags        String?
  creatorId   Int
  isPublic    Boolean  @default(true)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  creator     User         @relation("CircleCreator", fields: [creatorId], references: [id])
  members     CircleMember[]
  posts       Post[]

  @@map("circles")
}

model CircleMember {
  id        Int      @id @default(autoincrement())
  circleId  Int
  userId    Int
  role      String   @default("member")
  joinedAt  DateTime @default(now())

  circle     Circle   @relation(fields: [circleId], references: [id], onDelete: Cascade)
  user       User     @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([circleId, userId])
  @@map("circle_members")
}

model Follow {
  id          Int      @id @default(autoincrement())
  followerId  Int
  followingId Int
  createdAt   DateTime @default(now())

  follower  User @relation("Follower", fields: [followerId], references: [id], onDelete: Cascade)
  following User @relation("Following", fields: [followingId], references: [id], onDelete: Cascade)

  @@unique([followerId, followingId])
  @@map("follows")
}

model Organization {
  id           Int      @id @default(autoincrement())
  name         String
  description  String?
  contactName  String?
  contactPhone String?
  logo         String?
  memberCount  Int      @default(0)
  status       String   @default("ACTIVE")
  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt

  members     OrganizationMember[]
  assignments CourseAssignment[]

  @@map("organizations")
}

model OrganizationMember {
  id             Int      @id @default(autoincrement())
  organizationId Int
  userId         Int
  role           String   @default("MEMBER")
  status         String   @default("ACTIVE")
  joinedAt       DateTime @default(now())

  organization Organization @relation(fields: [organizationId], references: [id], onDelete: Cascade)
  user         User         @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([organizationId, userId])
  @@map("organization_members")
}

model CourseAssignment {
  id             Int      @id @default(autoincrement())
  organizationId Int
  courseId       Int
  assignedBy     Int
  deadline       DateTime?
  createdAt      DateTime @default(now())

  organization Organization @relation(fields: [organizationId], references: [id], onDelete: Cascade)
  course       Course       @relation(fields: [courseId], references: [id], onDelete: Cascade)

  @@map("course_assignments")
}

model Notification {
  id        Int      @id @default(autoincrement())
  userId    Int
  type      String   // 'like', 'comment', 'follow', 'system'
  title     String
  content   String?
  link      String?
  relatedId Int?
  isRead    Boolean  @default(false)
  createdAt DateTime @default(now())

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId, isRead])
  @@map("notifications")
}