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

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

model User {
  id        String   @id @default(cuid())
  email     String   @unique
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  sessions          Session[]
  draft             RuleDraft?
  rules             PublishedRule[]
  /// At most one pending verified email change (CR-103).
  emailChangeToken  EmailChangeToken?
}

/// Pending email change: user must open verify link sent to `newEmail` (CR-103).
/// Separate from `MagicLinkToken` so sign-in and email-change flows cannot be confused.
model EmailChangeToken {
  id        String   @id @default(cuid())
  userId    String   @unique
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  newEmail  String
  tokenHash String   @unique
  expiresAt DateTime
  createdAt DateTime @default(now())

  @@index([newEmail])
}

model Session {
  id        String   @id @default(cuid())
  userId    String
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  tokenHash String   @unique
  expiresAt DateTime
  createdAt DateTime @default(now())

  @@index([userId])
}

model MagicLinkToken {
  id        String   @id @default(cuid())
  email     String
  tokenHash String   @unique
  expiresAt DateTime
  nextPath  String?
  createdAt DateTime @default(now())

  @@index([email])
}

model RuleDraft {
  id        String   @id @default(cuid())
  userId    String   @unique
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  payload   Json
  updatedAt DateTime @updatedAt
}

model PublishedRule {
  id        String   @id @default(cuid())
  userId    String?
  user      User?    @relation(fields: [userId], references: [id], onDelete: SetNull)
  title     String
  summary   String?
  document  Json
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([userId])
}

model RuleTemplate {
  id          String   @id @default(cuid())
  slug        String   @unique
  title       String
  category    String?
  description String?
  body        Json
  sortOrder   Int      @default(0)
  featured    Boolean  @default(false)
}

/// Recommendation matrix (CR-88).
/// JSON in `data/create/customRule/<section>.json` is canonical; this table is
/// rebuilt from those files at `prisma db seed` time so the API can join.
/// See `docs/guides/template-recommendation-matrix.md` §7.
model MethodFacet {
  id      String  @id @default(cuid())
  /// One of "communication" | "membership" | "decisionApproaches" | "conflictManagement".
  section String
  /// Matches the `id` of an entry in `messages/en/create/customRule/<section>.json#/methods`.
  slug    String
  /// One of "size" | "orgType" | "scale" | "maturity".
  group   String
  /// Canonical facet value id, e.g. "workersCoop", "earlyStage".
  value   String
  /// `true` iff the JSON marks this method as matching the facet (`✓` cell).
  matches Boolean
  /// Optional per-cell weight; reserved for a future weighted-rank pass (v1 ignores).
  weight  Float?

  @@unique([section, slug, group, value])
  @@index([section])
  @@index([group, value, matches])
}