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

datasource db {
  provider = "postgresql"
}

// ─── Enums ───────────────────────────────────────────────────────────────────

enum Role {
  USER
  COACH
  ADMIN
}

enum Difficulty {
  BEGINNER
  INTERMEDIATE
  ADVANCED
}

enum GroupRole {
  MEMBER
  COACH
  ADMIN
}

enum FriendStatus {
  PENDING
  ACCEPTED
  REJECTED
}

// ─── User ────────────────────────────────────────────────────────────────────

model User {
  id        String   @id @default(uuid())
  username  String   @unique
  email     String   @unique
  password  String
  role      Role     @default(USER)
  avatar    String?
  bio       String?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  programs         Program[]
  histories        History[]
  groupMemberships GroupMember[]
  sentRequests     FriendRequest[] @relation("SentRequests")
  receivedRequests FriendRequest[] @relation("ReceivedRequests")
  rewards          UserReward[]

  @@map("users")
}

// ─── Exercise ────────────────────────────────────────────────────────────────

model Exercise {
  id           String     @id @default(uuid())
  name         String
  description  String?
  difficulty   Difficulty @default(BEGINNER)
  modelPath    String?
  muscleGroups String[]
  createdAt    DateTime   @default(now())
  updatedAt    DateTime   @updatedAt

  programExercises ProgramExercise[]
  historyEntries   HistoryEntry[]

  @@map("exercises")
}

// ─── Program ─────────────────────────────────────────────────────────────────

model Program {
  id          String   @id @default(uuid())
  name        String
  description String?
  isPublic    Boolean  @default(false)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  authorId String
  author   User   @relation(fields: [authorId], references: [id], onDelete: Cascade)

  exercises ProgramExercise[]
  groups    GroupProgram[]
  histories History[]

  @@map("programs")
}

model ProgramExercise {
  id          String @id @default(uuid())
  sets        Int
  reps        Int?
  durationSec Int?
  order       Int    @default(0)

  programId  String
  program    Program  @relation(fields: [programId], references: [id], onDelete: Cascade)
  exerciseId String
  exercise   Exercise @relation(fields: [exerciseId], references: [id], onDelete: Cascade)

  @@unique([programId, exerciseId])
  @@map("program_exercises")
}

// ─── History ─────────────────────────────────────────────────────────────────

model History {
  id          String    @id @default(uuid())
  date        DateTime  @default(now())
  completedAt DateTime?
  notes       String?

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

  entries HistoryEntry[]

  @@map("histories")
}

model HistoryEntry {
  id          String @id @default(uuid())
  sets        Int
  reps        Int?
  weightKg    Float?
  durationSec Int?

  historyId  String
  history    History  @relation(fields: [historyId], references: [id], onDelete: Cascade)
  exerciseId String
  exercise   Exercise @relation(fields: [exerciseId], references: [id], onDelete: Cascade)

  @@map("history_entries")
}

// ─── Group ───────────────────────────────────────────────────────────────────

model Group {
  id          String   @id @default(uuid())
  name        String
  description String?
  isPublic    Boolean  @default(false)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  members  GroupMember[]
  programs GroupProgram[]

  @@map("groups")
}

model GroupMember {
  role     GroupRole @default(MEMBER)
  joinedAt DateTime  @default(now())

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

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

model GroupProgram {
  addedAt DateTime @default(now())

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

  @@id([groupId, programId])
  @@map("group_programs")
}

// ─── Friends ─────────────────────────────────────────────────────────────────

model FriendRequest {
  id        String       @id @default(uuid())
  status    FriendStatus @default(PENDING)
  createdAt DateTime     @default(now())
  updatedAt DateTime     @updatedAt

  senderId   String
  sender     User   @relation("SentRequests", fields: [senderId], references: [id], onDelete: Cascade)
  receiverId String
  receiver   User   @relation("ReceivedRequests", fields: [receiverId], references: [id], onDelete: Cascade)

  @@unique([senderId, receiverId])
  @@map("friend_requests")
}

// ─── Rewards ─────────────────────────────────────────────────────────────────

model Reward {
  id          String  @id @default(uuid())
  name        String
  description String
  iconPath    String?
  condition   String

  users UserReward[]

  @@map("rewards")
}

model UserReward {
  earnedAt DateTime @default(now())

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

  @@id([userId, rewardId])
  @@map("user_rewards")
}