// 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"
}

// generator zod {
//     provider                  = "zod-prisma-types"
//     output                    = "../src/generated" // (default) the directory where generated zod schemas will be saved
//     createModelTypes          = true
//     createRelationValuesTypes = true
//     writeNullishInModelTypes  = true
//     createPartialTypes        = false
//     useMultipleFiles          = false
//     useTypeAssertions         = true
// }

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

model Taxonomy {
    id         String    @id @default(cuid())
    name       String    @unique
    slug       String    @unique @map("slug")
    deletedAt  DateTime? @map("deleted_at")
    createdAt  DateTime  @default(now()) @map("created_at")
    terms      Term[]
    objectType String[]  @map("object_type")
    order      Float?    @map("order")

    @@index([order, deletedAt])
    @@map("taxonomy")
}

model Term {
    id          String         @id @default(cuid())
    name        String
    taxonomy    Taxonomy?      @relation(fields: [taxonomyId], references: [id])
    taxonomyId  String?        @map("taxonomy_id")
    order       Float?         @map("order")
    description String?
    parentId    String?        @map("parent_id")
    parent      Term?          @relation("ChildParent", fields: [parentId], references: [id], onDelete: Cascade)
    children    Term[]         @relation("ChildParent")
    ancestors   TermAncestry[] @relation("DescendantToAncestor")
    descendants TermAncestry[] @relation("AncestorToDescendant")
    domainId    String?        @map("domain_id")
    domain      Department?    @relation("TermDom", fields: [domainId], references: [id])
    createdAt   DateTime       @default(now()) @map("created_at")
    updatedAt   DateTime       @updatedAt @map("updated_at")
    deletedAt   DateTime?      @map("deleted_at")
    createdBy   String?        @map("created_by")
    depts       Department[]   @relation("department_term")
    hasChildren Boolean?       @default(false) @map("has_children")
    courses     Course[]       @relation("course_term")

    @@index([name]) // 对name字段建立索引，以加快基于name的查找速度
    @@index([parentId]) // 对parentId字段建立索引，以加快基于parentId的查找速度
    @@map("term")
}

model TermAncestry {
    id           String  @id @default(cuid())
    ancestorId   String? @map("ancestor_id")
    descendantId String  @map("descendant_id")
    relDepth     Int     @map("rel_depth")
    ancestor     Term?   @relation("AncestorToDescendant", fields: [ancestorId], references: [id])
    descendant   Term    @relation("DescendantToAncestor", fields: [descendantId], references: [id])

    // 索引建议
    @@index([ancestorId]) // 针对祖先的查询
    @@index([descendantId]) // 针对后代的查询
    @@index([ancestorId, descendantId]) // 组合索引，用于查询特定的祖先-后代关系
    @@index([relDepth]) // 根据关系深度的查询
    @@map("term_ancestry")
}

model Staff {
    id          String  @id @default(cuid())
    showname    String? @map("showname")
    username    String  @unique @map("username")
    avatar      String? @map("avatar")
    password    String? @map("password")
    phoneNumber String? @unique @map("phone_number")

    domainId String? @map("domain_id")
    deptId   String? @map("dept_id")

    domain     Department? @relation("DomainStaff", fields: [domainId], references: [id])
    department Department? @relation("DeptStaff", fields: [deptId], references: [id])
    order      Float?

    createdAt DateTime  @default(now()) @map("created_at")
    updatedAt DateTime  @updatedAt @map("updated_at")
    enabled   Boolean?  @default(true)
    deletedAt DateTime? @map("deleted_at")
    officerId String?   @map("officer_id")

    watchedPost  Post[]    @relation("post_watch_staff")
    visits       Visit[]
    posts        Post[]
    sentMsgs     Message[] @relation("message_sender")
    receivedMsgs Message[] @relation("message_receiver")

    enrollments    Enrollment[]
    courseReviews  CourseReview[]
    teachedCourses CourseInstructor[]

    @@index([officerId])
    @@index([deptId])
    @@index([domainId])
    @@index([username])
    @@index([order])
    @@map("staff")
}

model Department {
    id           String         @id @default(cuid())
    name         String
    order        Float?
    ancestors    DeptAncestry[] @relation("DescendantToAncestor")
    descendants  DeptAncestry[] @relation("AncestorToDescendant")
    parentId     String?        @map("parent_id")
    parent       Department?    @relation("ChildParent", fields: [parentId], references: [id])
    children     Department[]   @relation("ChildParent")
    domainId     String?        @map("domain_id")
    domainTerms  Term[]         @relation("TermDom")
    deletedAt    DateTime?      @map("deleted_at")
    isDomain     Boolean?       @default(false) @map("is_domain")
    domainStaffs Staff[]        @relation("DomainStaff")
    deptStaffs   Staff[]        @relation("DeptStaff")
    terms        Term[]         @relation("department_term")

    watchedPost Post[]   @relation("post_watch_dept")
    hasChildren Boolean? @default(false) @map("has_children")

    @@index([parentId])
    @@index([isDomain])
    @@index([name])
    @@index([order])
    @@map("department")
}

model DeptAncestry {
    id           String      @id @default(cuid())
    ancestorId   String?     @map("ancestor_id")
    descendantId String      @map("descendant_id")
    relDepth     Int         @map("rel_depth")
    ancestor     Department? @relation("AncestorToDescendant", fields: [ancestorId], references: [id])
    descendant   Department  @relation("DescendantToAncestor", fields: [descendantId], references: [id])

    // 索引建议
    @@index([ancestorId]) // 针对祖先的查询
    @@index([descendantId]) // 针对后代的查询
    @@index([ancestorId, descendantId]) // 组合索引，用于查询特定的祖先-后代关系
    @@index([relDepth]) // 根据关系深度的查询
    @@map("dept_ancestry")
}

model RoleMap {
    id         String  @id @default(cuid())
    objectId   String  @map("object_id")
    roleId     String  @map("role_id")
    domainId   String? @map("domain_id")
    objectType String  @map("object_type")
    role       Role    @relation(fields: [roleId], references: [id])

    @@index([domainId])
    @@index([objectId])
    @@map("rolemap")
}

model Role {
    id          String    @id @default(cuid())
    name        String    @unique @map("name")
    permissions String[]  @default([]) @map("permissions")
    roleMaps    RoleMap[]
    system      Boolean?  @default(false) @map("system")
    createdAt   DateTime  @default(now()) @map("created_at")
    updatedAt   DateTime  @updatedAt @map("updated_at")
    deletedAt   DateTime? @map("deleted_at")

    @@map("role")
}

model AppConfig {
    id          String  @id @default(cuid())
    slug        String  @unique
    title       String?
    description String?
    meta        Json?

    @@map("app_config")
}

model Post {
    id              String       @id @default(cuid())
    type            String?
    title           String?
    content         String?
    author          Staff?       @relation(fields: [authorId], references: [id])
    authorId        String?
    domainId        String?
    referenceId     String?
    attachments     String[]     @default([])
    createdAt       DateTime     @default(now())
    updatedAt       DateTime     @updatedAt
    visits          Visit[]
    watchableStaffs Staff[]      @relation("post_watch_staff")
    watchableDepts  Department[] @relation("post_watch_dept")

    parentId  String?
    parent    Post?     @relation("PostChildren", fields: [parentId], references: [id])
    children  Post[]    @relation("PostChildren")
    deletedAt DateTime? @map("deleted_at")
    Lecture   Lecture?  @relation(fields: [lectureId], references: [id])
    lectureId String?

    // 复合索引
    @@index([type, domainId]) // 类型和域组合查询
    @@index([authorId, type]) // 作者和类型组合查询
    @@index([referenceId, type]) // 引用ID和类型组合查询
    @@index([parentId, type]) // 父级帖子和创建时间索引
    // 时间相关索引
    @@index([createdAt]) // 按创建时间倒序索引
    @@index([updatedAt]) // 按更新时间倒序索引
}

model Message {
    id          String    @id @default(cuid())
    url         String?
    intent      String?
    option      Json?
    senderId    String?   @map("sender_id")
    messageType String?
    sender      Staff?    @relation(name: "message_sender", fields: [senderId], references: [id])
    title       String?
    content     String?
    receivers   Staff[]   @relation("message_receiver")
    visits      Visit[]
    createdAt   DateTime  @default(now()) @map("created_at")
    updatedAt   DateTime? @updatedAt @map("updated_at")

    @@index([messageType, createdAt])
    @@map("message")
}

model Visit {
    id        String    @id @default(cuid())
    visitType String?   @map("visit_type")
    visitorId String    @map("visitor_id")
    visitor   Staff     @relation(fields: [visitorId], references: [id])
    postId    String?   @map("post_id")
    post      Post?     @relation(fields: [postId], references: [id])
    message   Message?  @relation(fields: [messageId], references: [id])
    messageId String?   @map("message_id")
    views     Int       @default(1)
    createdAt DateTime? @default(now()) @map("created_at")
    updatedAt DateTime? @updatedAt @map("updated_at")
    sourceIP  String?   @map("source_ip")

    @@index([postId, visitType, visitorId])
    @@index([messageId, visitType, visitorId])
    @@map("visit")
}


model Course {
    id          String  @id @default(cuid()) // 课程唯一标识符
    title       String // 课程标题
    subTitle    String? // 课程副标题(可选)
    description String // 课程详细描述 
    thumbnail   String? // 课程封面图片URL(可选)
    level       String // 课程难度等级

    // 课程内容组织结构
    terms       Term[]             @relation("course_term") // 课程学期
    instructors CourseInstructor[] // 课程讲师团队
    sections    Section[] // 课程章节结构
    enrollments Enrollment[] // 学生报名记录
    reviews     CourseReview[] // 学员课程评价

    // 课程规划与目标设定
    requirements String[] // 课程学习前置要求
    objectives   String[] // 具体的学习目标
    skills       String[] // 课程结束后可掌握的技能
    audiences    String[] // 目标受众群体描述

    // 课程统计指标
    totalDuration    Int   @default(0) // 课程总时长(分钟)
    totalLectures    Int   @default(0) // 总课时数
    averageRating    Float @default(0) // 平均评分(1-5分)
    numberOfReviews  Int   @default(0) // 评价总数
    numberOfStudents Int   @default(0) // 学习人数
    completionRate   Float @default(0) // 完课率(0-100%)

    // 课程状态管理
    status     String // 课程状态(如:草稿/已发布/已归档)
    isFeatured Boolean @default(false) // 是否为精选推荐课程

    // 生命周期时间戳
    createdAt   DateTime  @default(now()) // 创建时间
    updatedAt   DateTime  @updatedAt // 最后更新时间
    publishedAt DateTime? // 发布时间
    archivedAt  DateTime? // 归档时间
    deletedAt   DateTime? // 软删除时间

    // 数据库索引优化
    @@index([status]) // 课程状态索引,用于快速筛选
    @@index([level]) // 难度等级索引,用于分类查询
    @@index([isFeatured]) // 精选标记索引,用于首页推荐
}


model Section {
    id          String   @id @default(cuid()) // 章节唯一标识符
    title       String // 章节标题
    description String? // 章节描述(可选)
    objectives  String[] // 本章节的具体学习目标
    order       Float?   @default(0) // 章节排序权重

    // 关联关系
    course   Course    @relation(fields: [courseId], references: [id], onDelete: Cascade)
    courseId String // 所属课程ID
    lectures Lecture[] // 包含的所有课时

    // 章节统计数据
    totalDuration Int @default(0) // 本章节总时长(分钟)
    totalLectures Int @default(0) // 本章节课时总数

    // 时间管理
    createdAt DateTime  @default(now()) // 创建时间
    updatedAt DateTime  @updatedAt // 更新时间
    deletedAt DateTime? // 软删除时间

    @@index([courseId, order]) // 复合索引:用于按课程ID和顺序快速查询
}


model Lecture {
    id          String  @id @default(cuid()) // 课时唯一标识符
    title       String // 课时标题
    description String? // 课时描述(可选)
    order       Float?  @default(0) // 课时排序权重
    duration    Int // 学习时长(分钟)
    type        String // 课时类型(video/article)

    // 课时内容
    content        String? // Markdown格式文章内容
    videoUrl       String? // 视频URL地址
    videoThumbnail String? // 视频封面图URL

    // 关联内容
    resources Resource[] // 课时附属资源
    section   Section           @relation(fields: [sectionId], references: [id], onDelete: Cascade)
    sectionId String // 所属章节ID
    comments  Post[] // 课时评论
    progress  LectureProgress[] // 学习进度记录

    // 时间管理
    publishedAt DateTime? // 发布时间
    createdAt   DateTime  @default(now()) // 创建时间
    updatedAt   DateTime  @updatedAt // 更新时间
    deletedAt   DateTime? // 软删除时间

    @@index([sectionId, order]) // 章节内课时排序索引
    @@index([type, publishedAt]) // 课时类型和发布时间复合索引
}


model Enrollment {
    id     String @id @default(cuid()) // 报名记录唯一标识符
    status String // 报名状态(如:进行中/已完成/已过期)

    // 关联关系
    student   Staff             @relation(fields: [studentId], references: [id])
    studentId String // 学员ID
    course    Course            @relation(fields: [courseId], references: [id])
    courseId  String // 课程ID
    progress  LectureProgress[] // 课时学习进度记录

    // 学习数据统计
    completionRate Float     @default(0) // 课程完成度(0-100%)
    lastAccessedAt DateTime? // 最后访问时间

    // 时间管理
    createdAt   DateTime  @default(now()) // 报名时间
    updatedAt   DateTime  @updatedAt // 更新时间
    completedAt DateTime? // 完课时间


    @@unique([studentId, courseId]) // 确保学员不会重复报名同一课程
    @@index([status]) // 报名状态索引
    @@index([completedAt]) // 完课时间索引
}


model LectureProgress {
    id          String  @id @default(cuid()) // 进度记录唯一标识符
    progress    Float   @default(0) // 完成进度(0-100%)
    isCompleted Boolean @default(false) // 是否完成

    // 关联关系
    enrollment   Enrollment @relation(fields: [enrollmentId], references: [id], onDelete: Cascade)
    enrollmentId String // 报名记录ID
    lecture      Lecture    @relation(fields: [lectureId], references: [id], onDelete: Cascade)
    lectureId    String // 课时ID

    // 学习数据
    lastPosition   Int @default(0) // 视频播放位置(秒)
    viewCount      Int @default(0) // 观看次数
    readCount      Int @default(0) // 阅读次数
    totalWatchTime Int @default(0) // 总观看时长(秒)

    // 时间记录
    lastWatchedAt DateTime? // 最后观看时间
    createdAt    DateTime  @default(now()) // 创建时间
    updatedAt    DateTime  @updatedAt // 更新时间

    @@unique([enrollmentId, lectureId]) // 确保每个报名只有一条课时进度
    @@index([isCompleted]) // 完成状态索引
    @@index([lastWatchedAt]) // 最后观看时间索引
}

model CourseInstructor {
    course       Course   @relation(fields: [courseId], references: [id])
    courseId     String // 课程ID
    instructor   Staff    @relation(fields: [instructorId], references: [id])
    instructorId String // 讲师ID
    role         String // 讲师角色
    createdAt    DateTime @default(now()) // 创建时间
    order        Float?   @default(0) // 讲师显示顺序

    @@id([courseId, instructorId]) // 联合主键
}


model CourseReview {
    id           String   @id @default(cuid()) // 评价唯一标识符
    rating       Int // 评分(1-5星)
    content      String? // 评价内容
    student      Staff    @relation(fields: [studentId], references: [id])
    studentId    String // 评价学员ID
    course       Course   @relation(fields: [courseId], references: [id])
    courseId     String // 课程ID
    helpfulCount Int      @default(0) // 评价点赞数
    createdAt    DateTime @default(now()) // 评价时间
    updatedAt    DateTime @updatedAt // 更新时间

    @@unique([studentId, courseId]) // 确保学员对同一课程只能评价一次
    @@index([rating]) // 评分索引
}


model Resource {
    id          String  @id @default(cuid()) // 资源唯一标识符
    title       String // 资源标题
    description String? // 资源描述
    type        String // 资源类型
    url         String // 资源URL

    fileType String? // 文件MIME类型
    fileSize Int? // 文件大小(bytes)

    lecture       Lecture  @relation(fields: [lectureId], references: [id], onDelete: Cascade)
    lectureId     String // 所属课时ID
    downloadCount Int      @default(0) // 下载次数
    createdAt     DateTime @default(now()) // 创建时间
    updatedAt     DateTime @updatedAt // 更新时间

    @@index([lectureId, type]) // 课时资源类型复合索引
}

model Node {
    id          String     @id @default(cuid())
    title       String
    description String?
    type        String
    // 节点之间的关系
    sourceEdges NodeEdge[] @relation("from_node")
    targetEdges NodeEdge[] @relation("to_node")
    style       Json?
    position    Json? // 存储节点在画布中的位置 {x: number, y: number}
    data        Json?

    createdAt DateTime @default(now())
    updatedAt DateTime @updatedAt
}

// 节点之间的关系
model NodeEdge {
    id          String   @id @default(cuid())
    // 关系的起点和终点
    source      Node     @relation("from_node", fields: [sourceId], references: [id], onDelete: Cascade)
    sourceId    String
    target      Node     @relation("to_node", fields: [targetId], references: [id], onDelete: Cascade)
    targetId    String
    // 关系属性
    type        String?
    label       String?
    description String?
    // 自定义边的样式（可选）
    style       Json? // 存储边的样式，如 {color: string, strokeWidth: number}
    createdAt   DateTime @default(now())
    updatedAt   DateTime @updatedAt

    @@unique([sourceId, targetId, type])
    @@index([sourceId])
    @@index([targetId])
}