package tools

import (
	"context"
	"encoding/json"
	"strings"

	"ollie/toolsrv"
)

// ToolActive lists tools currently loaded (promoted) in this session.
func ToolActive(ctx context.Context, srv *toolsrv.Server, args json.RawMessage) (string, error) {
	reg := srv.ToolRegistry()
	sid := srv.SessionID()
	if reg == nil || sid == "" {
		return "(no tools loaded)", nil
	}
	loaded := reg.Loaded(sid)
	if len(loaded) == 0 {
		return "(no tools loaded)", nil
	}
	var out strings.Builder
	for _, t := range loaded {
		out.WriteString(t.Name)
		if t.Description != "" {
			out.WriteString(" — ")
			out.WriteString(t.Description)
		}
		out.WriteString("\n")
	}
	return strings.TrimRight(out.String(), "\n"), nil
}