//                           _       _
// __      _____  __ ___   ___  __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
//  \ V  V /  __/ (_| |\ V /| | (_| | ||  __/
//   \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
//  Copyright © 2016 - 2025 Weaviate B.V. All rights reserved.
//
//  CONTACT: hello@weaviate.io
//

package clients

import (
	"context"
	"fmt"
	"strings"
	"time"

	"github.com/weaviate/weaviate/entities/moduletools"
	"github.com/weaviate/weaviate/usecases/modulecomponents"
	"github.com/weaviate/weaviate/usecases/modulecomponents/clients/nvidia"

	"github.com/sirupsen/logrus"
	"github.com/weaviate/weaviate/modules/multi2vec-nvidia/ent"
)

type vectorizer struct {
	client *nvidia.Client
	logger logrus.FieldLogger
}

func New(apiKey string, timeout time.Duration, logger logrus.FieldLogger) *vectorizer {
	return &vectorizer{
		client: nvidia.New(apiKey, timeout, logger),
		logger: logger,
	}
}

func (v *vectorizer) Vectorize(ctx context.Context,
	texts, images []string, cfg moduletools.ClassConfig,
) (*modulecomponents.VectorizationCLIPResult[[]float32], error) {
	return v.vectorize(ctx, texts, images, cfg)
}

func (v *vectorizer) VectorizeQuery(ctx context.Context,
	input []string, cfg moduletools.ClassConfig,
) (*modulecomponents.VectorizationCLIPResult[[]float32], error) {
	return v.vectorize(ctx, input, nil, cfg)
}

func (v *vectorizer) vectorize(ctx context.Context,
	texts, images []string, cfg moduletools.ClassConfig,
) (*modulecomponents.VectorizationCLIPResult[[]float32], error) {
	var textVectors [][]float32
	var imageVectors [][]float32
	settings := ent.NewClassSettings(cfg)
	if len(texts) > 0 {
		textEmbeddings, err := v.client.Vectorize(ctx, texts, nvidia.Settings{
			BaseURL: settings.BaseURL(),
			Model:   settings.Model(),
		})
		if err != nil {
			return nil, err
		}
		textVectors = textEmbeddings.Vector
	}
	if len(images) > 0 {
		inputs := make([]string, len(images))
		for i := range images {
			if !strings.HasPrefix(images[i], "data:") {
				inputs[i] = fmt.Sprintf("data:image/png;base64,%s", images[i])
			} else {
				inputs[i] = images[i]
			}
		}
		imageEmbeddings, err := v.client.Vectorize(ctx, inputs, nvidia.Settings{
			Model:   settings.Model(),
			BaseURL: settings.BaseURL(),
		})
		if err != nil {
			return nil, err
		}
		imageVectors = imageEmbeddings.Vector
	}
	return &modulecomponents.VectorizationCLIPResult[[]float32]{
		TextVectors:  textVectors,
		ImageVectors: imageVectors,
	}, nil
}