package main

import (
	"context"
	"errors"

	"github.com/bwmarrin/discordgo"
	"github.com/justinian/dice"
	opentracing "github.com/opentracing/opentracing-go"
)

func roll(ctx context.Context, s *discordgo.Session, m *discordgo.Message, parv []string) error {
	sp, ctx := opentracing.StartSpanFromContext(ctx, "dice")
	defer sp.Finish()

	if len(parv) != 2 {
		return errors.New("not enough parameters (expected 1)")
	}

	text, _, err := dice.Roll(parv[1])
	if err != nil {
		return err
	}

	_, err = s.ChannelMessageSend(m.ChannelID, text.String())
	return err
}