package bot

import (
	"fmt"

	"github.com/bwmarrin/discordgo"
)

func (cs *CommandSet) help(s *discordgo.Session, m *discordgo.Message, parv []string) error {
	switch len(parv) {
	case 1:
		result := cs.formHelp()

		authorChannel, err := s.UserChannelCreate(m.Author.ID)
		if err != nil {
			return err
		}

		s.ChannelMessageSend(authorChannel.ID, result)

		s.ChannelMessageSend(m.ChannelID, fmt.Sprintf("<@%s> check direct messages, help is there!", m.Author.ID))

	default:
		return ErrParvCountMismatch
	}

	return nil
}

func (cs *CommandSet) formHelp() string {
	result := "Bot commands: \n"

	for verb, cmd := range cs.cmds {
		result += fmt.Sprintf("%s%s: %s\n", cs.Prefix, verb, cmd.Helptext())
	}

	return (result + "If there's any problems please don't hesitate to ask a server admin for help.")
}