package main

import (
	"fmt"
	"math"
	"time"

	"github.com/bwmarrin/discordgo"
)

const generalChannelID = "645550570001924098"
const emojiCheck = "✅"

var prestigeList = make(map[string]string)

func messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
	if m.Author.Bot {
		return
	}
	go incrementXP(s, m.Author.ID, m.ChannelID == generalChannelID)

	if m.Content == "pgqlevel" {
		handleXPRequest(s, m)
	}
	if m.Content == "pgqshard" {
		handleShardRequest(s, m)
	}
	if m.Content == "pgqprestige" {
		handlePrestigeRequest(s, m)
	}
}

func handleXPRequest(s *discordgo.Session, m *discordgo.MessageCreate) {
	level, xp := getLevelAndXP(s, m.Author.ID)
	levelUpRequirement := levelUpRequirementCache[level-1]
	if level > 1 {
		levelUpRequirement -= levelUpRequirementCache[level-2]
	}
	s.ChannelMessageSend(
		m.ChannelID,
		fmt.Sprintf(
			"<@%s> is now level %d. (%d XP/%d XP) [%.1f%%]",
			m.Author.ID, level, xp, levelUpRequirement, float64(xp)/float64(levelUpRequirement)*100,
		),
	)
}

func handleShardRequest(s *discordgo.Session, m *discordgo.MessageCreate) {
	shard := getShard(s, m.Author.ID)
	s.ChannelMessageSend(
		m.ChannelID,
		fmt.Sprintf(
			"<@%s> has %d shards.",
			m.Author.ID, shard,
		),
	)
}

func handlePrestigeRequest(s *discordgo.Session, m *discordgo.MessageCreate) {
	currentPrestigeLevel := getPrestige(s, m.Author.ID)
	xp := getXP(s, m.Author.ID)
	newPrestigeLevel := xp/130000 + 1

	if xp < levelUpRequirementCache[4] && currentPrestigeLevel == 1 {
		s.ChannelMessageSend(m.ChannelID, "**PRESTIGE > **Prestige is only unlocked after level 5!")
		return
	}

	var lowerLevelWarning string
	if newPrestigeLevel <= currentPrestigeLevel {
		lowerLevelWarning = "**WARNING: Your new prestige multiplier is NOT higher than your current prestige multiplier."
	}
	nearestPowerOfTen := math.Pow10(int(math.Floor(math.Log10(float64(newPrestigeLevel)))))
	nextNearestLogicalPrestige := int((math.Floor(float64(newPrestigeLevel)/nearestPowerOfTen) + 1) * nearestPowerOfTen)

	msg, err := s.ChannelMessageSend(
		m.ChannelID,
		fmt.Sprintf(
			"<@%s>, here's your prestige multiplier:\n**Now: **__%dx__\n**New: **__%dx__\n**Next: **__%dx__ [%.1f%%]\n%s\n"+
				"React with :white_check_mark: to proceed with prestiging.",
			m.Author.ID,
			currentPrestigeLevel,
			newPrestigeLevel,
			nextNearestLogicalPrestige, float64(xp)/float64(130000*(nextNearestLogicalPrestige-1))*100,
			lowerLevelWarning,
		),
	)
	if err != nil {
		logError(s, "handlePrestigeRequest", "send", err)
		return
	}
	prestigeList[msg.ID] = m.Author.ID
	err = s.MessageReactionAdd(msg.ChannelID, msg.ID, emojiCheck)
	if err != nil {
		logError(s, "handlePrestigeRequest", "addReaction", err)
		return
	}
	go func() {
		time.Sleep(15 * time.Second)
		err = s.MessageReactionsRemoveAll(msg.ChannelID, msg.ID)
		if err != nil {
			logError(s, "handlePrestigeRequest", "removeReaction", err)
		}
	}()
}

func checkPrestigeReact(s *discordgo.Session, m *discordgo.MessageReactionAdd) {
	if prestigeList[m.MessageID] != m.UserID {
		return
	}
	xp := getXP(s, m.UserID)
	newPrestigeLevel := xp/130000 + 1
	go cleanUpRole(s, m.UserID)
	setPrestige(s, m.UserID, newPrestigeLevel)
	s.ChannelMessageSend(m.ChannelID, "**PRESTIGE > ** <@%s>, you have prestiged!")
}