package platformsettings

import (
	"context"
	"errors"
	"strings"

	"github.com/descrybe/descrybe-v2/apps/api/internal/processing"
)

// DynamicPinecone resolves platform settings on each call so admin changes
// apply without restarting the worker. Embeddings use admin AI role
// "vectorization" (ResolveAIConfig) with OPENAI_EMBEDDING_* / OPENAI_* env fallback.
type DynamicPinecone struct {
	Settings *Service
}

func (d *DynamicPinecone) Enabled() bool {
	if d == nil || d.Settings == nil {
		return false
	}
	cfg, err := d.Settings.ResolvePinecone(context.Background())
	return err == nil && cfg.Configured()
}

func (d *DynamicPinecone) SuggestCategory(ctx context.Context, companyID, productText string, candidates []string) (string, error) {
	if d == nil || d.Settings == nil {
		return "", errors.New("pinecone not configured")
	}
	cfg, err := d.Settings.ResolvePinecone(ctx)
	if err != nil {
		return "", err
	}
	if !cfg.Configured() {
		return "", errors.New("pinecone not configured")
	}
	cat := processing.NewPineconeCategorizer(cfg.APIKey, cfg.Host, cfg.Namespace)
	if emb, eerr := d.Settings.ResolveEmbedder(ctx); eerr == nil && emb != nil {
		cat.Embedder = emb
	}
	return cat.SuggestCategory(ctx, companyID, productText, candidates)
}

// ResolveEmbedder builds an OpenAI-compatible Embedder from admin AI role
// "vectorization" (DB), falling back to OPENAI_EMBEDDING_* then OPENAI_* env.
// Returns (nil, nil) when unset so callers can keep Pinecone text-query mode.
func (s *Service) ResolveEmbedder(ctx context.Context) (processing.Embedder, error) {
	if s == nil {
		return nil, nil
	}
	cfg, err := s.ResolveAIConfig(ctx, AIRoleVectorization)
	if err != nil {
		return nil, err
	}
	if strings.TrimSpace(cfg.APIKey) == "" {
		return nil, nil
	}
	model := strings.TrimSpace(cfg.Model)
	if model == "" {
		model = defaultEmbeddingModel
	}
	client := processing.NewOpenAIClient(cfg.APIKey, cfg.BaseURL, model, 0, 3)
	return client, nil
}