// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

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

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

// ===== ENUMS =====

enum CampaignStatus {
  DRAFT
  IN_REVIEW
  ACTIVE
  PAUSED
  ENDED
  REJECTED
}

enum BillingModel {
  FIXED
  CPM
  CPC
}

enum CampaignObjective {
  AWARENESS
  SALES
}

enum SurfaceKey {
  HOME_FEATURED_CAROUSEL
  HOME_TOP_EVENTS
  CATEGORY_FEATURED
  CITY_TRENDING
  SEARCH_BOOSTED
}

enum TrackingEventType {
  IMPRESSION
  CLICK
}

// ===== MODELS =====

model Campaign {
  id              String            @id @default(uuid())
  partnerId       String
  name            String
  objective       CampaignObjective
  status          CampaignStatus    @default(DRAFT)
  
  startAt         DateTime
  endAt           DateTime
  
  billingModel    BillingModel
  totalBudget     Decimal           @db.Decimal(10, 2)
  dailyCap        Decimal?          @db.Decimal(10, 2)
  spent           Decimal           @default(0) @db.Decimal(10, 2)
  
  // Targeting (stored as JSON)
  targeting       Json              // { cityIds: [], categoryIds: [], countryCodes: [] }
  frequencyCap    Int               @default(0) // 0 = unlimited
  
  // Relations
  placements      SponsoredPlacement[]
  events          CampaignEvent[]   // Many-to-many via join table or array of IDs
  
  approvedBy      String?
  rejectedReason  String?
  createdBy       String
  
  createdAt       DateTime          @default(now())
  updatedAt       DateTime          @updatedAt
  
  auditLogs       CampaignAuditLog[]
}

model SponsoredPlacement {
  id              String            @id @default(uuid())
  campaignId      String
  campaign        Campaign          @relation(fields: [campaignId], references: [id])
  
  eventId         String
  surfaceKey      SurfaceKey
  priority        String            @default("SPONSORED")
  
  bid             Decimal           @db.Decimal(10, 2)
  status          String            @default("ACTIVE") // ACTIVE, PAUSED
  rank            Int               @default(0)

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

  @@unique([campaignId, eventId, surfaceKey])
}

model CampaignEvent {
  id          String   @id @default(uuid())
  campaignId  String
  campaign    Campaign @relation(fields: [campaignId], references: [id])
  eventId     String   // Reference to Event table (not shown here)
  
  @@unique([campaignId, eventId])
}

model AdTrackingEvent {
  id              String            @id @default(uuid())
  type            TrackingEventType
  
  placementId     String
  campaignId      String
  surfaceKey      SurfaceKey
  eventId         String
  
  userId          String?
  anonId          String
  sessionId       String
  
  timestamp       DateTime          @default(now())
  device          String?
  cityId          String?

  @@index([campaignId, type, timestamp])
  @@index([anonId, timestamp]) // For frequency capping queries
}

model PlacementDailyStats {
  id              String            @id @default(uuid())
  campaignId      String
  placementId     String
  surfaceKey      SurfaceKey
  
  date            DateTime          @db.Date
  
  impressions     Int               @default(0)
  clicks          Int               @default(0)
  spend           Decimal           @default(0) @db.Decimal(10, 2)
  
  createdAt       DateTime          @default(now())
  updatedAt       DateTime          @updatedAt

  @@unique([campaignId, placementId, surfaceKey, date])
}

model CampaignAuditLog {
  id              String      @id @default(uuid())
  campaignId      String
  campaign        Campaign    @relation(fields: [campaignId], references: [id])
  
  actorId         String
  action          String      // CREATED, UPDATED, SUBMITTED, APPROVED, REJECTED, PAUSED, RESUMED
  details         Json?       // Changed fields, reason, etc.
  
  createdAt       DateTime    @default(now())
}

// ===== PARTNER GOVERNANCE =====

enum KYCStatus {
  PENDING
  VERIFIED
  REJECTED
}

enum KYCDocStatus {
  PENDING
  APPROVED
  REJECTED
}

enum PartnerEventStatus {
  PENDING_REVIEW
  LIVE
  DRAFT
  COMPLETED
  CANCELLED
  REJECTED
}

model PartnerProfile {
  id              String      @id @default(cuid())
  userId          String      @unique    // FK to User table
  verification    KYCStatus   @default(PENDING)
  riskScore       Int         @default(0)
  
  documents       PartnerDoc[]
  
  createdAt       DateTime    @default(now())
  updatedAt       DateTime    @updatedAt
}

model PartnerDoc {
  id              String        @id @default(cuid())
  partnerId       String
  partner         PartnerProfile @relation(fields: [partnerId], references: [id])
  
  type            String        // "PAN", "GST", "AADHAAR", "CANCELLED_CHEQUE", "BUSINESS_REG"
  name            String
  url             String
  status          KYCDocStatus  @default(PENDING)
  mandatory       Boolean       @default(true)
  
  adminNote       String?
  reviewedBy      String?
  reviewedAt      DateTime?
  
  uploadedBy      String
  uploadedAt      DateTime      @default(now())
  
  @@index([partnerId, status])
}