// Domain models

model Group {
  id          String      @id @default(cuid())
  name        String
  description String?
  days        WeekDay[]
  time        String?
  capacity    Int?
  price       Decimal?    @db.Decimal(10, 2)
  billingType BillingType?
  dueDay      Int?
  inviteToken String?     @unique
  createdById String
  createdAt   DateTime    @default(now())
  updatedAt   DateTime    @updatedAt

  owner     User          @relation("OwnerGroups", fields: [createdById], references: [id], onDelete: Cascade)
  members   GroupMember[]
  attendees Attendee[]
  payments  Payment[]
  waitlist  GroupWaitlistEntry[]
  classSessions ClassSession[]

  @@map("groups")
}

enum WeekDay {
  MONDAY
  TUESDAY
  WEDNESDAY
  THURSDAY
  FRIDAY
  SATURDAY
  SUNDAY
}

enum BillingType {
  MONTHLY
  PER_CLASS
}

model GroupMember {
  id       String @id @default(cuid())
  groupId  String
  userId   String
  role     Role   @default(MEMBER) // OWNER, ADMIN, MEMBER
  joinedAt DateTime @default(now())

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

  @@unique([groupId, userId])
  @@map("group_members")
}

enum Role {
  OWNER
  ADMIN
  MEMBER
}

enum AttendeeStatus {
  ACTIVE
  PAUSED
  DROPPED
}

model Attendee {
  id            String         @id @default(cuid())
  groupId       String
  fullName      String
  email         String?
  phone         String?
  guardianName  String?
  guardianPhone String?
  notes         String?
  notifyToken   String?        @unique @default(cuid())
  status        AttendeeStatus @default(ACTIVE)
  createdAt     DateTime       @default(now())
  updatedAt     DateTime       @updatedAt

  group        Group         @relation(fields: [groupId], references: [id], onDelete: Cascade)
  payments     Payment[]
  attendances  Attendance[]
  slotReleases SlotRelease[]

  @@index([groupId])
  @@map("attendees")
}

model Payment {
  id         String        @id @default(cuid())
  groupId    String
  attendeeId String
  amount     Decimal       @db.Decimal(10, 2)
  currency   String        @default("MXN")
  status     PaymentStatus @default(PENDING) // PENDING, PAID, OVERDUE, CANCELLED
  dueDate    DateTime
  paidAt     DateTime?
  createdAt  DateTime      @default(now())
  updatedAt  DateTime      @updatedAt

  group    Group    @relation(fields: [groupId], references: [id], onDelete: Cascade)
  attendee Attendee @relation(fields: [attendeeId], references: [id], onDelete: Cascade)

  @@index([groupId])
  @@index([attendeeId])
  @@map("payments")
}

enum PaymentStatus {
  PENDING
  PAID
  OVERDUE
  CANCELLED
}

model WaitlistEntry {
  id        String        @id @default(cuid())
  email     String
  name      String?
  status    WaitlistStatus @default(PENDING) // PENDING, INVITED, JOINED, DECLINED
  createdAt DateTime      @default(now())
  updatedAt DateTime      @updatedAt

  userId String? @unique

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

  @@unique([email])
  @@map("waitlist_entries")
}

model GroupWaitlistEntry {
  id        String         @id @default(cuid())
  groupId   String
  fullName  String
  phone     String
  email     String?
  notes     String?
  status    WaitlistStatus @default(PENDING) // PENDING, INVITED, JOINED, DECLINED
  createdAt DateTime       @default(now())
  updatedAt DateTime       @updatedAt

  group Group @relation(fields: [groupId], references: [id], onDelete: Cascade)

  @@unique([groupId, phone])
  @@index([groupId])
  @@map("group_waitlist_entries")
}

enum WaitlistStatus {
  PENDING
  INVITED
  JOINED
  DECLINED
}

enum PaymentProvider {
  MERCADO_PAGO
  STRIPE
}

model MerchantAccount {
  id          String          @id @default(cuid())
  userId      String          @unique
  provider    PaymentProvider
  accessToken String?
  sandbox     Boolean         @default(true)
  connectedAt DateTime        @default(now())
  createdAt   DateTime        @default(now())
  updatedAt   DateTime        @updatedAt

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

  @@map("merchant_accounts")
}