package modules

import (
	"fmt"
	"strconv"
	"strings"

	"github.com/bwmarrin/discordgo"

	"TerraOceanBot/discord/config"
	"TerraOceanBot/discord/message"
)

func enforceDM(passOn CommandHandler) CommandHandler {
	return func(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
		if m.GuildID != "" {
			//This command can only be used in DM to protect the invite creator.
			s.ChannelMessageDelete(m.ChannelID, m.ID)
			message.InitNewEmbed(
				config.ErrorMustDMTitle,
				fmt.Sprintf(config.ErrorMustDMDescription, m.Author.ID, m.Author.ID),
				config.ErrorColour,
			).Send(s, m.ChannelID)
			return
		}
		passOn(s, m, command)
	}
}

func memberFilter(mustBeMember bool, passOn CommandHandler) CommandHandler {
	return func(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
		member, err := s.GuildMember(config.GuildID, m.Author.ID)
		if err != nil {
			message.InitNewEmbed(config.PermissionErrorTitle, config.ErrorCannotFindMember, config.ErrorColour).
				Send(s, m.ChannelID)
			return
		}
		for _, v := range member.Roles {
			if v == config.MemberRoleID {
				if mustBeMember {
					passOn(s, m, command)
				} else {
					message.InitNewEmbed(config.PermissionErrorTitle, config.ErrorMustNotBeMember, config.ErrorColour).
						Send(s, m.ChannelID)
				}
				return
			}
		}
		if mustBeMember {
			message.InitNewEmbed(config.PermissionErrorTitle, config.ErrorMustBeMember, config.ErrorColour).
				Send(s, m.ChannelID)
		} else {
			passOn(s, m, command)
		}
	}
}

func enforceArgumentCount(usage string, count int, passOn CommandHandler) CommandHandler {
	return func(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
		if len(command) < count {
			message.InitNewEmbed(config.UsageTitle, usage, config.UsageColour).
				Send(s, m.ChannelID)
			return
		}
		command[count-1] = strings.Join(command[count-1:], " ")
		passOn(s, m, command[:count])
	}
}

func formatFloat(n float64, precision int) string {
	return strconv.FormatFloat(n, 'f', precision, 64)
}