package tools

import (
	"context"
	"encoding/json"
	"fmt"

	"eino-test/internal/rag"

	"github.com/cloudwego/eino/components/tool"
	"github.com/cloudwego/eino/components/tool/utils"
)

type FindRelatedInput struct {
	NoteID string `json:"note_id" jsonschema:"description=The ID of the note to find related notes for,required"`
}

func NewFindRelatedTool(pipeline *rag.RAGPipeline) tool.InvokableTool {
	t, _ := utils.InferTool("find_related", "Find notes related to a given note based on content similarity.", func(ctx context.Context, input *FindRelatedInput) (string, error) {
		note, err := pipeline.NoteStore().GetByID(ctx, input.NoteID)
		if err != nil {
			return "", fmt.Errorf("note not found: %w", err)
		}

		results, err := pipeline.Search(ctx, note.Content, 6)
		if err != nil {
			return "", fmt.Errorf("search related: %w", err)
		}

		type related struct {
			Title string  `json:"title"`
			Score float64 `json:"score"`
			Tags  []string `json:"tags"`
		}
		var items []related
		for _, r := range results {
			if r.Note.ID == input.NoteID {
				continue
			}
			items = append(items, related{
				Title: r.Note.Title,
				Score: r.Score,
				Tags:  r.Note.Tags,
			})
		}
		if len(items) > 5 {
			items = items[:5]
		}
		b, _ := json.Marshal(items)
		return string(b), nil
	})
	return t
}