// Training & Certification Domain
// Contains training programs, certifications, and farmer development

// Training-specific Enums
enum TrainingStatus {
    ENROLLED
    IN_PROGRESS
    COMPLETED
    DROPPED
}

enum CertificationStatus {
    PENDING
    APPROVED
    REJECTED
    EXPIRED
}

// Training Models
model Training {
    id              String   @id @default(cuid())
    title           String
    description     String?
    content         String?
    category        String
    duration        Int? // in minutes
    level           String? // beginner, intermediate, advanced
    prerequisites   String?
    maxParticipants Int?     // Maximum number of participants
    createdBy       String?  // Admin who created the training
    isActive        Boolean  @default(true)
    createdAt       DateTime @default(now())
    updatedAt       DateTime @updatedAt

    // Relations
    farmerTrainings FarmerTraining[]

    @@index([category])
    @@index([level])
    @@index([isActive])
    @@index([duration])
    @@index([createdBy])
    @@map("trainings")
}

model FarmerTraining {
    id              String         @id @default(cuid())
    farmerId        String
    trainingId      String
    status          TrainingStatus @default(ENROLLED)
    progress        Int            @default(0) // percentage
    score           Float?
    completedAt     DateTime?
    assignedBy      String?        // Admin who assigned the farmer to training
    assignedAt      DateTime?      // When the assignment was made
    assignmentReason String?       // Reason for assignment
    deadline        DateTime?      // Expected completion deadline
    createdAt       DateTime       @default(now())
    updatedAt       DateTime       @updatedAt

    // Relations
    farmer   Farmer   @relation(fields: [farmerId], references: [id], onDelete: Cascade)
    training Training @relation(fields: [trainingId], references: [id], onDelete: Cascade)

    @@unique([farmerId, trainingId])
    @@index([farmerId])
    @@index([trainingId])
    @@index([status])
    @@index([completedAt])
    @@index([progress])
    @@index([assignedBy])
    @@index([assignedAt])
    @@index([deadline])
    @@map("farmer_trainings")
}

model Certification {
    id             String   @id @default(cuid())
    name           String
    description    String?
    validityPeriod Int? // in months
    requirements   String?
    isActive       Boolean  @default(true)
    createdAt      DateTime @default(now())
    updatedAt      DateTime @updatedAt

    // Relations
    farmerCertifications FarmerCertification[]

    @@index([name])
    @@index([isActive])
    @@index([validityPeriod])
    @@map("certifications")
}

model FarmerCertification {
    id                String              @id @default(cuid())
    farmerId          String
    certificationId   String
    status            CertificationStatus @default(PENDING)
    issuedDate        DateTime?
    expiryDate        DateTime?
    certificateNumber String?
    notes             String?
    createdAt         DateTime            @default(now())
    updatedAt         DateTime            @updatedAt

    // Relations
    farmer        Farmer        @relation(fields: [farmerId], references: [id], onDelete: Cascade)
    certification Certification @relation(fields: [certificationId], references: [id], onDelete: Cascade)

    @@unique([farmerId, certificationId])
    @@index([farmerId])
    @@index([certificationId])
    @@index([status])
    @@index([expiryDate])
    @@index([issuedDate])
    @@map("farmer_certifications")
}