package main

import (
	"crypto/rand"
	"fmt"

	"github.com/bwmarrin/discordgo"
)

const (
	viewAuditLogRole   = "645856347258093568"
	manageWebhookRole  = "645856081750523914"
	changeNicknameRole = "645977231281356800"
	embedLinkRole      = "645977361254318080"
	voiceActivityRole  = "645977361254318080"
)

func checkForGachaEligibility(dg *discordgo.Session, discordID, intendedLevel string) {
	member, err := dg.GuildMember(guildID, discordID)
	if err != nil {
		logError(dg, "checkForGachaEligibility", "getGuildMember", discordID)
		return
	}
	found := false
	for _, v := range member.Roles {
		if v == intendedLevel {
			found = true
			break
		}
	}
	if found {
		return
	}

	if intendedLevel != rolesFromLevel[0] {
		rollGacha(dg, member)
	}

	err = dg.GuildMemberRoleAdd(guildID, discordID, intendedLevel)
	if err != nil {
		logError(dg, "checkForGachaEligibility", "guildMemberRoleAdd", err)
	}
}

func rollGacha(dg *discordgo.Session, member *discordgo.Member) {
	lookUpAndGive := func(friendlyName, role string) {
		found := false
		for _, v := range member.Roles {
			if v == role {
				found = true
				break
			}
		}
		channel, err := dg.UserChannelCreate(member.User.ID)
		if found {
			rewardShard(dg, member.User.ID)
			if err == nil {
				dg.ChannelMessageSend(
					channel.ID,
					fmt.Sprintf(
						"**GACHA > ** You got __%s__! However, it was a duplicate so you got a shard instead.", friendlyName,
					),
				)
			}
		} else {
			dg.GuildMemberRoleAdd(guildID, member.User.ID, role)
			dg.ChannelMessageSend(
				channel.ID,
				fmt.Sprintf("**GACHA > ** You got __%s__!", friendlyName),
			)
		}
	}
	gachaRandomness := make([]byte, 1)
	rand.Read(gachaRandomness)
	switch gachaRandomness[0] % 5 {
	case 0:
		lookUpAndGive("View Audit Log", viewAuditLogRole)
	case 1:
		lookUpAndGive("Manage Webhook", manageWebhookRole)
	case 2:
		lookUpAndGive("Change Nickname", changeNicknameRole)
	case 3:
		lookUpAndGive("Embed Link", embedLinkRole)
	case 4:
		lookUpAndGive("Use Voice Activity", voiceActivityRole)
	}
}