package validation

import (
	"context"
	"fmt"
	"meteor-compute-service/internal/models"
)

// ValidationProvider defines the pluggable interface for event validation algorithms
type ValidationProvider interface {
	// Validate performs validation on a raw event and returns a validation result
	Validate(ctx context.Context, rawEvent *models.RawEvent) (*models.ValidationResult, error)
	
	// GetProviderInfo returns metadata about this validation provider
	GetProviderInfo() ProviderInfo
}

// ProviderInfo contains metadata about a validation provider
type ProviderInfo struct {
	Name        string `json:"name"`
	Version     string `json:"version"`
	Description string `json:"description"`
	Algorithm   string `json:"algorithm"`
}

// ProviderType represents the available validation provider types
type ProviderType string

const (
	ProviderTypeMVP       ProviderType = "mvp"
	ProviderTypeClassicCV ProviderType = "classic_cv"
)

// ProviderFactory creates validation providers based on configuration
type ProviderFactory struct{}

// NewProviderFactory creates a new provider factory instance
func NewProviderFactory() *ProviderFactory {
	return &ProviderFactory{}
}

// CreateProvider creates a validation provider based on the specified type
func (f *ProviderFactory) CreateProvider(providerType ProviderType) (ValidationProvider, error) {
	switch providerType {
	case ProviderTypeMVP:
		return NewMVPValidationProvider(), nil
	case ProviderTypeClassicCV:
		return NewClassicCvProvider(), nil
	default:
		return nil, fmt.Errorf("unknown validation provider type: %s", providerType)
	}
}

// GetAvailableProviders returns a list of all available provider types
func (f *ProviderFactory) GetAvailableProviders() []ProviderType {
	return []ProviderType{
		ProviderTypeMVP,
		ProviderTypeClassicCV,
	}
}