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

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

model User {
  id          String        @id @default(cuid())
  githubId    String        @unique
  username    String
  avatarUrl   String
  accessToken String? // Store encrypted GitHub access token
  pullRequest PullRequest[]
  createdAt   DateTime      @default(now()) @map("created_at")
  updatedAt   DateTime      @updatedAt @map("updated_at")

  @@map("users")
}

model Repository {
  id          Int     @id // GitHub repository ID
  name        String
  fullName    String  @unique @map("full_name") // owner/repo
  owner       String
  description String?
  htmlUrl     String  @map("html_url")
  homepage    String?

  // Visibility and status
  isPrivate  Boolean @default(false) @map("is_private")
  isFork     Boolean @default(false) @map("is_fork")
  isArchived Boolean @default(false) @map("is_archived")
  isTemplate Boolean @default(false) @map("is_template")

  // Real-time statistics (cached in Redis, snapshot in DB)
  stargazersCount Int @default(0) @map("stargazers_count")
  forksCount      Int @default(0) @map("forks_count")
  watchersCount   Int @default(0) @map("watchers_count")
  openIssuesCount Int @default(0) @map("open_issues_count")
  size            Int @default(0) // Repository size in KB

  // Language and topics
  language  String? // Primary language
  languages Json? // Language distribution { "JavaScript": 12345, "TypeScript": 6789 }
  topics    String[] @default([])

  // License
  licenseName String? @map("license_name")
  licenseKey  String? @map("license_key")

  // Timestamps
  githubCreatedAt DateTime  @map("github_created_at")
  githubUpdatedAt DateTime  @map("github_updated_at")
  githubPushedAt  DateTime? @map("github_pushed_at")

  // Local timestamps
  createdAt    DateTime  @default(now()) @map("created_at")
  updatedAt    DateTime  @updatedAt @map("updated_at")
  lastSyncedAt DateTime? @map("last_synced_at") // Last time we synced from GitHub API

  // Relations
  pullRequests PullRequest[]
  stats        RepositoryStats[]

  @@map("repositories")
}

// Historical statistics snapshots for trend analysis
model RepositoryStats {
  id           String     @id @default(cuid())
  repository   Repository @relation(fields: [repositoryId], references: [id], onDelete: Cascade)
  repositoryId Int        @map("repository_id")

  // Statistics snapshot
  stargazersCount Int @map("stargazers_count")
  forksCount      Int @map("forks_count")
  watchersCount   Int @map("watchers_count")
  openIssuesCount Int @map("open_issues_count")

  // Timestamp
  snapshotAt DateTime @default(now()) @map("snapshot_at")

  @@index([repositoryId, snapshotAt])
  @@map("repository_stats")
}

model PullRequest {
  id           String     @id @default(cuid())
  number       Int
  title        String
  state        String
  createdAt    DateTime   @map("created_at")
  closedAt     DateTime?  @map("closed_at")
  repository   Repository @relation(fields: [repositoryId], references: [id], onDelete: Cascade)
  repositoryId Int        @map("repository_id")
  author       User       @relation(fields: [authorId], references: [id])
  authorId     String     @map("author_id")

  @@unique([repositoryId, number])
  @@map("pull_requests")
}