// Product Management Domain
// Contains Product, ProductVariant, modifiers, and pricing models

// Product-specific Enums
enum ModifierSelectionType {
    DROPDOWN
    INPUT
}

enum NominalType {
    NOMINAL
    PERCENTAGE
}

enum RuleCondition {
    EQUALS
    LESS_THAN
    GREATER_THAN
    BETWEEN
}

// Product Models
model Product {
    id          String   @id @default(cuid())
    name        String // e.g., "Pepper"
    code        String   @unique
    description String?
    category    String
    unit        String   @default("kg") // kg, ton, etc
    isActive    Boolean  @default(true)
    createdAt   DateTime @default(now())
    updatedAt   DateTime @updatedAt

    // Relations
    plots        Plot[]
    variants     ProductVariant[]
    modifiers    ProductModifier[]
    contracts    Contract[]
    priceHistory PriceHistory[]
    marketPrices MarketPrice[]
    marketDemand MarketDemand[]
    plotSeasons  PlotSeason[]
    seasonHarvests SeasonHarvest[]

    @@index([code])
    @@index([category])
    @@index([isActive])
    @@index([name])
    @@map("products")
}

model ProductVariant {
    id          String   @id @default(cuid())
    productId   String
    name        String // e.g., "Black Pepper", "White Pepper"
    code        String   @unique
    description String?
    basePrice   Decimal? // default base price
    isActive    Boolean  @default(true)
    createdAt   DateTime @default(now())
    updatedAt   DateTime @updatedAt

    // Relations
    product      Product        @relation(fields: [productId], references: [id], onDelete: Cascade)
    plots        Plot[]
    harvests     Harvest[]
    procurements Procurement[]
    contracts    Contract[]
    priceHistory PriceHistory[]
    marketPrices MarketPrice[]
    marketDemand MarketDemand[]
    plotSeasons  PlotSeason[]
    seasonHarvests SeasonHarvest[]

    @@index([code])
    @@index([productId])
    @@index([isActive])
    @@index([basePrice])
    @@map("product_variants")
}

model ProductModifier {
    id            String                @id @default(cuid())
    productId     String
    name          String // e.g., "Water Content", "Density"
    code          String
    description   String?
    selectionType ModifierSelectionType @default(INPUT)
    nominalType   NominalType           @default(NOMINAL)
    options       String[] // For dropdown selections
    minimum       Decimal?
    maximum       Decimal?
    unit          String? // %, kg/m3, etc
    isRequired    Boolean               @default(false)
    isActive      Boolean               @default(true)
    createdAt     DateTime              @default(now())
    updatedAt     DateTime              @updatedAt

    // Relations
    product          Product               @relation(fields: [productId], references: [id], onDelete: Cascade)
    rules            ProductModifierRule[]
    harvestModifiers HarvestModifier[]

    @@unique([productId, code])
    @@index([productId])
    @@index([isActive])
    @@index([selectionType])
    @@map("product_modifiers")
}

model ProductModifierRule {
    id              String        @id @default(cuid())
    modifierId      String
    condition       RuleCondition
    priceAdjustment Decimal // amount to adjust price
    value           String? // For equals condition
    minValue        Decimal? // For lessThan or between conditions
    maxValue        Decimal? // For greaterThan or between conditions
    description     String?
    isActive        Boolean       @default(true)
    createdAt       DateTime      @default(now())
    updatedAt       DateTime      @updatedAt

    // Relations
    modifier ProductModifier @relation(fields: [modifierId], references: [id], onDelete: Cascade)

    @@map("product_modifier_rules")
}

model HarvestModifier {
    id         String @id @default(cuid())
    harvestId  String
    modifierId String
    value      String // actual value applied
    adjustment Decimal? // calculated price adjustment
    createdAt  DateTime @default(now())
    updatedAt  DateTime @updatedAt

    // Relations
    harvest  Harvest         @relation(fields: [harvestId], references: [id], onDelete: Cascade)
    modifier ProductModifier @relation(fields: [modifierId], references: [id])

    @@unique([harvestId, modifierId])
    @@map("harvest_modifiers")
}

model PriceHistory {
    id            String       @id @default(cuid())
    productId     String?
    variantId     String?
    qualityGrade  QualityGrade
    basePrice     Decimal
    marketPrice   Decimal?
    premiumRate   Decimal        @default(0)
    effectiveDate DateTime
    region        String?
    notes         String?
    createdAt     DateTime     @default(now())

    // Relations
    product Product?        @relation(fields: [productId], references: [id])
    variant ProductVariant? @relation(fields: [variantId], references: [id])

    @@index([productId, variantId])
    @@index([effectiveDate])
    @@index([qualityGrade])
    @@index([region])
    @@map("price_history")
}