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

model User {
    id        Int        @id @default(autoincrement())
    npub      String     @unique
    username  String?    @unique
    purchased Purchase[]
    role      Role?      @relation(fields: [roleId], references: [id])
    roleId    Int?
    createdAt DateTime   @default(now())
    updatedAt DateTime   @updatedAt
}

model Role {
    id    Int    @id @default(autoincrement())
    name  String @unique
    users User[]
}

model Course {
    id          Int        @id @default(autoincrement())
    title       String
    description String
    isFree      Boolean    @default(false)
    resources   Resource[]
    purchases   Purchase[]
    noteId      String?    @unique
    createdAt   DateTime   @default(now())
    updatedAt   DateTime   @updatedAt
}

model Resource {
    id        Int      @id @default(autoincrement())
    title     String
    content   String // Markdown content
    course    Course?  @relation(fields: [courseId], references: [id])
    noteId    String?  @unique
    courseId  Int?
    createdAt DateTime @default(now())
    updatedAt DateTime @updatedAt
}

model Purchase {
    id          Int      @id @default(autoincrement())
    user        User     @relation(fields: [userId], references: [id])
    userId      Int
    course      Course   @relation(fields: [courseId], references: [id])
    courseId    Int
    amountPaid  Int // in satoshis
    paymentType String // Webln or NWC
    createdAt   DateTime @default(now())
    updatedAt   DateTime @updatedAt
}