package cmd

import (
	"fmt"

	"github.com/kb-search/kb/internal/api"
	"github.com/kb-search/kb/internal/output"
	"github.com/spf13/cobra"
)

var findCmd = &cobra.Command{
	Use:   "find <query>",
	Short: "Find documents by their indexed content",
	Args:  cobra.ExactArgs(1),
	RunE:  runFind,
}

func init() {
	findCmd.Flags().IntP("top", "n", 10, "number of documents to return")
	findCmd.Flags().String("tags", "", "filter by tags (comma-separated)")
	findCmd.Flags().String("type", "", "filter by document type")
	rootCmd.AddCommand(findCmd)
}

func runFind(cmd *cobra.Command, args []string) error {
	top, _ := cmd.Flags().GetInt("top")
	tags, _ := cmd.Flags().GetString("tags")
	docType, _ := cmd.Flags().GetString("type")
	body := map[string]interface{}{"query": args[0], "top": top}
	if tags != "" {
		body["tags"] = splitTags(tags)
	}
	if docType != "" {
		body["doc_type"] = docType
	}

	resp, err := api.NewClient().Post("/api/v1/documents/find", body)
	if err != nil {
		return err
	}
	if err := api.CheckError(resp); err != nil {
		return err
	}
	if output.IsJSON() {
		var raw interface{}
		if err := api.DecodeJSON(resp, &raw); err != nil {
			return fmt.Errorf("failed to decode response: %w", err)
		}
		output.PrintJSON(raw)
		return nil
	}

	var docs []struct {
		DocumentID int     `json:"document_id"`
		Title      string  `json:"title"`
		Filename   string  `json:"original_filename"`
		Type       string  `json:"doc_type"`
		Score      float64 `json:"score"`
		HitCount   int     `json:"hit_count"`
		TopChunk   string  `json:"top_chunk"`
	}
	if err := api.DecodeJSON(resp, &docs); err != nil {
		return fmt.Errorf("failed to decode response: %w", err)
	}
	if len(docs) == 0 {
		fmt.Println("No documents found.")
		return nil
	}
	for i, doc := range docs {
		preview := doc.TopChunk
		if len(preview) > 200 {
			preview = preview[:200] + "..."
		}
		fmt.Printf("\n%d. [%.4f] %s (doc:%d, hits:%d)\n", i+1, doc.Score, doc.Title, doc.DocumentID, doc.HitCount)
		if doc.Filename != "" {
			fmt.Printf("   Filename: %s\n", doc.Filename)
		}
		if doc.Type != "" {
			fmt.Printf("   Type: %s\n", doc.Type)
		}
		fmt.Printf("   %s\n", preview)
	}
	fmt.Println()
	return nil
}