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

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

model User {
  id            String    @id @default(cuid())
  email         String    @unique
  passwordHash  String?
  name          String?
  did           String?   @unique  // EncryptID DID (passkey identity)
  credits       Int       @default(0)
  lastCreditAt  DateTime  @default(now())
  emailVerified DateTime?
  votes         Vote[]
  finalVotes    FinalVote[]
  proposals     Proposal[]
  createdAt     DateTime  @default(now())
  updatedAt     DateTime  @updatedAt

  // NextAuth fields
  accounts      Account[]
  sessions      Session[]

  // Space memberships
  spaceMemberships SpaceMember[]
}

model Account {
  id                String  @id @default(cuid())
  userId            String
  type              String
  provider          String
  providerAccountId String
  refresh_token     String? @db.Text
  access_token      String? @db.Text
  expires_at        Int?
  token_type        String?
  scope             String?
  id_token          String? @db.Text
  session_state     String?

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

  @@unique([provider, providerAccountId])
}

model Session {
  id           String   @id @default(cuid())
  sessionToken String   @unique
  userId       String
  expires      DateTime
  user         User     @relation(fields: [userId], references: [id], onDelete: Cascade)
}

model VerificationToken {
  identifier String
  token      String   @unique
  expires    DateTime

  @@unique([identifier, token])
}

// ─── Spaces (Multi-Tenant) ───────────────────────────────────────────

model Space {
  id          String  @id @default(cuid())
  name        String
  slug        String  @unique
  description String? @db.Text
  visibility  String  @default("public_read") // public, public_read, authenticated, members_only
  ownerDid    String?

  // Configurable per-space voting parameters
  promotionThreshold Int @default(100)
  votingPeriodDays   Int @default(7)
  creditsPerDay      Int @default(10)
  maxCredits         Int @default(500)
  startingCredits    Int @default(50)

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

  members   SpaceMember[]
  proposals Proposal[]
  invites   SpaceInvite[]
}

enum SpaceRole {
  ADMIN
  MEMBER
}

model SpaceMember {
  id       String    @id @default(cuid())
  userId   String
  user     User      @relation(fields: [userId], references: [id], onDelete: Cascade)
  spaceId  String
  space    Space     @relation(fields: [spaceId], references: [id], onDelete: Cascade)
  role     SpaceRole @default(MEMBER)

  // Per-space credits
  credits      Int      @default(0)
  lastCreditAt DateTime @default(now())

  joinedAt DateTime @default(now())

  @@unique([userId, spaceId])
  @@index([spaceId])
}

model SpaceInvite {
  id        String    @id @default(cuid())
  spaceId   String
  space     Space     @relation(fields: [spaceId], references: [id], onDelete: Cascade)

  // For email invites
  email     String?

  // For shareable link invites
  token     String    @unique @default(cuid())

  // Invite metadata
  maxUses   Int?
  uses      Int       @default(0)
  expiresAt DateTime?
  createdBy String
  createdAt DateTime  @default(now())

  @@index([token])
  @@index([email, spaceId])
}

// ─── Proposals & Voting ──────────────────────────────────────────────

model Proposal {
  id           String         @id @default(cuid())
  title        String
  description  String         @db.Text
  authorId     String
  author       User           @relation(fields: [authorId], references: [id])
  spaceId      String?
  space        Space?         @relation(fields: [spaceId], references: [id], onDelete: Cascade)
  status       ProposalStatus @default(RANKING)
  score        Int            @default(0)
  votes        Vote[]
  finalVotes   FinalVote[]
  votingEndsAt DateTime?
  createdAt    DateTime       @default(now())
  updatedAt    DateTime       @updatedAt

  @@index([spaceId, status])
}

enum ProposalStatus {
  RANKING
  VOTING
  PASSED
  FAILED
  ARCHIVED
}

model Vote {
  id         String   @id @default(cuid())
  userId     String
  user       User     @relation(fields: [userId], references: [id])
  proposalId String
  proposal   Proposal @relation(fields: [proposalId], references: [id], onDelete: Cascade)
  weight     Int
  creditCost Int
  createdAt  DateTime @default(now())
  decaysAt   DateTime

  @@unique([userId, proposalId])
}

model FinalVote {
  id         String     @id @default(cuid())
  userId     String
  user       User       @relation(fields: [userId], references: [id])
  proposalId String
  proposal   Proposal   @relation(fields: [proposalId], references: [id], onDelete: Cascade)
  vote       VoteChoice
  createdAt  DateTime   @default(now())

  @@unique([userId, proposalId])
}

enum VoteChoice {
  YES
  NO
  ABSTAIN
}