// Prisma Schema for LocalGreenChain
// Note: This requires Agent 2 (Database) to set up the database connection
// For now, marketplace uses in-memory storage in lib/marketplace/store.ts

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

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

// ===========================================
// User & Authentication Models (Agent 1)
// ===========================================

enum Role {
  USER
  GROWER
  SELLER
  ADMIN
}

model User {
  id            String    @id @default(cuid())
  email         String    @unique
  emailVerified DateTime?
  passwordHash  String?
  name          String?
  image         String?
  role          Role      @default(USER)
  createdAt     DateTime  @default(now())
  updatedAt     DateTime  @updatedAt

  // Relations
  plants           Plant[]
  farms            VerticalFarm[]
  listings         Listing[]
  offers           Offer[]
  wishlistItems    WishlistItem[]
  sellerProfile    SellerProfile?
  auditLogs        AuditLog[]
}

// ===========================================
// Plant & Blockchain Models
// ===========================================

model Plant {
  id              String   @id @default(cuid())
  name            String
  species         String
  variety         String?
  parentId        String?
  generation      Int      @default(1)
  registeredAt    DateTime @default(now())
  ownerId         String
  locationLat     Float?
  locationLng     Float?
  blockHash       String?

  owner           User     @relation(fields: [ownerId], references: [id])
  parent          Plant?   @relation("PlantLineage", fields: [parentId], references: [id])
  children        Plant[]  @relation("PlantLineage")
  transportEvents TransportEvent[]
  environmentRecords EnvironmentRecord[]
  listings        Listing[]
}

model TransportEvent {
  id          String   @id @default(cuid())
  plantId     String
  eventType   String
  fromLat     Float?
  fromLng     Float?
  toLat       Float?
  toLng       Float?
  distance    Float?
  carbonKg    Float?
  timestamp   DateTime @default(now())
  metadata    Json?

  plant       Plant    @relation(fields: [plantId], references: [id])
}

model EnvironmentRecord {
  id          String   @id @default(cuid())
  plantId     String
  temperature Float?
  humidity    Float?
  light       Float?
  soilMoisture Float?
  recordedAt  DateTime @default(now())

  plant       Plant    @relation(fields: [plantId], references: [id])
}

// ===========================================
// Vertical Farm Models
// ===========================================

model VerticalFarm {
  id          String   @id @default(cuid())
  name        String
  ownerId     String
  totalArea   Float
  zones       Int
  createdAt   DateTime @default(now())

  owner       User     @relation(fields: [ownerId], references: [id])
  farmZones   FarmZone[]
  batches     CropBatch[]
}

model FarmZone {
  id          String   @id @default(cuid())
  farmId      String
  name        String
  area        Float
  lightType   String
  status      String

  farm        VerticalFarm @relation(fields: [farmId], references: [id])
  batches     CropBatch[]
}

model CropBatch {
  id          String   @id @default(cuid())
  farmId      String
  zoneId      String
  cropType    String
  plantedAt   DateTime @default(now())
  harvestedAt DateTime?
  status      String

  farm        VerticalFarm @relation(fields: [farmId], references: [id])
  zone        FarmZone     @relation(fields: [zoneId], references: [id])
}

// ===========================================
// Marketplace Models (Agent 9)
// ===========================================

enum ListingCategory {
  seeds
  seedlings
  mature_plants
  cuttings
  produce
  supplies
}

enum ListingStatus {
  draft
  active
  sold
  expired
  cancelled
}

enum OfferStatus {
  pending
  accepted
  rejected
  withdrawn
  expired
}

model Listing {
  id          String   @id @default(cuid())
  sellerId    String
  plantId     String?
  title       String
  description String   @db.Text
  price       Decimal  @db.Decimal(10, 2)
  currency    String   @default("USD")
  quantity    Int
  category    ListingCategory
  status      ListingStatus @default(draft)
  locationLat Float?
  locationLng Float?
  locationCity String?
  locationRegion String?
  tags        String[]
  viewCount   Int      @default(0)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  expiresAt   DateTime?

  seller      User     @relation(fields: [sellerId], references: [id])
  plant       Plant?   @relation(fields: [plantId], references: [id])
  offers      Offer[]
  images      ListingImage[]
  wishlistItems WishlistItem[]

  @@index([sellerId])
  @@index([category])
  @@index([status])
  @@index([createdAt])
}

model ListingImage {
  id          String   @id @default(cuid())
  listingId   String
  url         String
  alt         String?
  isPrimary   Boolean  @default(false)
  createdAt   DateTime @default(now())

  listing     Listing  @relation(fields: [listingId], references: [id], onDelete: Cascade)

  @@index([listingId])
}

model Offer {
  id          String   @id @default(cuid())
  listingId   String
  buyerId     String
  amount      Decimal  @db.Decimal(10, 2)
  message     String?  @db.Text
  status      OfferStatus @default(pending)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  expiresAt   DateTime?

  listing     Listing  @relation(fields: [listingId], references: [id])
  buyer       User     @relation(fields: [buyerId], references: [id])

  @@index([listingId])
  @@index([buyerId])
  @@index([status])
}

model SellerProfile {
  id          String   @id @default(cuid())
  userId      String   @unique
  displayName String
  bio         String?  @db.Text
  locationCity String?
  locationRegion String?
  rating      Float    @default(0)
  reviewCount Int      @default(0)
  totalSales  Int      @default(0)
  verified    Boolean  @default(false)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

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

model WishlistItem {
  id          String   @id @default(cuid())
  userId      String
  listingId   String
  addedAt     DateTime @default(now())

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

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

// ===========================================
// Transparency & Audit Models
// ===========================================

model AuditLog {
  id          String   @id @default(cuid())
  userId      String?
  action      String
  entityType  String
  entityId    String
  details     Json?
  ipAddress   String?
  userAgent   String?
  createdAt   DateTime @default(now())

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

  @@index([entityType, entityId])
  @@index([createdAt])
}