package modules

import (
	"fmt"
	"strings"

	"github.com/bwmarrin/discordgo"

	"TerraOceanBot/db"
	"TerraOceanBot/discord/backend"
)

var trustMessage = make(map[string]string)

func changeTrust(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
	if !enforceDM(s, m) {
		return
	}
	if !membersOnly(s, m) {
		return
	}
	if len(command) < 2 {
		s.ChannelMessageSend(m.ChannelID, "指令的使用方法是`!trust <你要改信任度的人>`.\nUsage: `!trust <the user>`")
		return
	}

	member, err := backend.GetMemberFromUserFriendlyName(s, strings.SplitN(m.Content, " ", 2)[1])
	if err == backend.ErrMemberNotFound {
		s.ChannelMessageSend(m.ChannelID, "无法找到您所要求的玩家。\nCannot find the requested player.")
		return
	}
	if err != nil {
		auditLog(s, fmt.Sprintf("Error while processing change trust request for <@%s>: %s", m.Author.ID, err.Error()))
		return
	}

	message, err := s.ChannelMessageSendEmbed(
		m.ChannelID,
		createTrustEmbed(member.User.Username+"#"+member.User.Discriminator, member.Nick),
	)
	if err != nil {
		auditLog(s, fmt.Sprintf("Error while sending change trust request for <@%s>: %s", m.Author.ID, err.Error()))
		return
	}

	trustMessage[message.ID] = member.User.ID

	s.MessageReactionAdd(m.ChannelID, message.ID, emojiOne)
	s.MessageReactionAdd(m.ChannelID, message.ID, emojiTwo)
	s.MessageReactionAdd(m.ChannelID, message.ID, emojiThree)
	s.MessageReactionAdd(m.ChannelID, message.ID, emojiFour)
	s.MessageReactionAdd(m.ChannelID, message.ID, emojiFive)
	s.MessageReactionAdd(m.ChannelID, message.ID, emojiCheck)
}

func createTrustEmbed(username, nick string) *discordgo.MessageEmbed {
	embed := newEmbed().SetColour(0x00FFFF).SetTitle("更新玩家评分Update Player Score").AddField("ID", username)
	if nick != "" {
		embed.AddField("昵称Nickname", nick)
	}
	embed.AddField("提醒Reminder", "你一个月只能更换对一个玩家的评分一次。You can only change your trust towards a player once every month.")
	return embed.Build()
}

func CheckForTrustUpdate(s *discordgo.Session, r *discordgo.MessageReactionAdd) {
	if r.UserID == s.State.User.ID {
		return
	}
	target, ok := trustMessage[r.MessageID]

	if !ok {
		return
	}

	delete(trustMessage, r.MessageID)

	var value int
	switch r.Emoji.Name {
	case emojiOne:
		value = 1
	case emojiTwo:
		value = 2
	case emojiThree:
		value = 3
	case emojiFour:
		value = 4
	case emojiFive:
		value = 5
	case emojiCheck:
		value = db.NuclearOptionVote
	default:
		auditLog(s, "Reaction "+r.Emoji.Name+" was added to trust message ID "+r.MessageID)
		return
	}

	err := backend.UpdateTrust(r.UserID, target, value)
	if err == db.ErrRecentlyChanged {
		s.ChannelMessageSend(r.ChannelID, "你在一个月内有设定过该名玩家的分数。你这次的更动没有被记录。\nYou have changed your score for this player within the last month. Your change was not recorded.")
		return
	}
	if err != nil {
		auditLog(s, fmt.Sprintf("Error while changing the trust value for <@%s> with target <@%s>: %s", r.UserID, target, err.Error()))
		return
	}

	s.ChannelMessageSend(r.ChannelID, "已改变你给这名玩家的分数已被记录。\nThe score for this player has been updated.")
}