package vision

import (
	"github.com/yaoapp/yao/agent/context"
)

// PreprocessVisionMessages preprocess messages to handle vision content
// Removes or converts vision content for models that don't support it
func PreprocessVisionMessages(messages []context.Message, supportsVision bool) []context.Message {
	// TODO: Implement vision message preprocessing
	// If supportsVision is false:
	// - Remove image_url content parts
	// - Convert to text-only messages
	// - Optionally add image descriptions from vision API
	// If supportsVision is true:
	// - Validate image URLs
	// - Ensure proper format
	return messages
}

// ConvertImageToText convert image content to text description
// Used when model doesn't support vision
func ConvertImageToText(imageURL string) (string, error) {
	// TODO: Implement image to text conversion
	// - Call vision API (if configured)
	// - Generate description
	// - Return as text content
	return "", nil
}

// ValidateImageURL validate image URL format
func ValidateImageURL(imageURL string) error {
	// TODO: Implement image URL validation
	// - Check URL format
	// - Validate image type
	// - Check accessibility
	return nil
}

// ExtractImagesFromMessages extract all image URLs from messages
func ExtractImagesFromMessages(messages []context.Message) []string {
	// TODO: Implement image extraction
	// - Iterate through messages
	// - Find ContentPart with type="image_url"
	// - Collect all image URLs
	return nil
}