import { Guild, GuildMember, Message, MessageCreateOptions, MessageReaction, Role, TextChannel, User } from 'discord.js'
import { v4 as uuid } from 'uuid'
import { client } from '../..'
import { config } from '../configuration'
import { logger } from '../logger'
import { Command } from '../structures/command'
import { RunOptions } from '../types/commandTypes'
import { off } from 'process'
import { ScheduledTask, schedule } from 'node-cron'

let task: ScheduledTask

export default new Command({
    name: 'announce',
    description: 'Neues announcement im announcement Channel an alle senden.',
    options: [],
    run: async (interaction: RunOptions) => {
        const command = interaction.interaction
        const requestId = uuid()
        const guildId = command.guildId!
        logger.info("Got command for announcing!", { guildId, requestId })

        if (!isAdmin(command.member)) {
            logger.info(`Announcement was requested by ${command.member.displayName} but they are not an admin! Not sending announcement.`, { guildId, requestId })
            return
        } else {
            logger.info(`User ${command.member.displayName} seems to be admin`)
        }
        sendAnnouncement(guildId, requestId)
        command.followUp("Ist rausgeschickt!")
    }
})

function isAdmin(member: GuildMember): boolean {
    return member.roles.cache.find((role, _) => role.id === config.bot.jf_admin_role) !== undefined
}

async function sendAnnouncement(guildId: string, requestId: string): Promise<void> {
    logger.info("Sending announcement")
    const announcementChannel: TextChannel = client.getAnnouncementChannelForGuild(guildId)

    const body = `Hey! @everyone! Hier ist der Watchparty Bot vom Hartzarett. 
    
Wir machen in Zukunft regelmäßig Watchparties! Falls du mitmachen möchtest, reagiere einfach auf diesen Post mit 🎫, dann bekommst du automatisch eine Rolle zugewiesen und wirst benachrichtigt sobald es in der Zukunft weitere Watchparties und Filme zum abstimmen gibt.

Für eine Erklärung wie das alles funktioniert mach einfach /mitgucken für eine lange Erklärung am Stück oder /guides wenn du auswählen möchtest wozu du Infos bekommst.`

    const options: MessageCreateOptions = {
        allowedMentions: { parse: ['everyone'] },
        content: body
    }
    const message: Message<true> = await announcementChannel.send(options)
    await message.react("🎫")
    // await message.pin()

    task = schedule("* * * * * *", async () => {
        const reactions = await message.reactions.resolve("🎫")
        if (reactions) {
            manageAnnouncementRoles(message.guild, reactions)
        } else {
            logger.error("Did not get reactions! Aborting!", { guildId, requestId })
        }
    })
}

async function manageAnnouncementRoles(guild: Guild, reaction: MessageReaction) {
    const requestId = uuid()
    const guildId = guild.id
    logger.info("Managing roles", { guildId, requestId })

    const announcementRole: Role | undefined = (await guild.roles.fetch()).find(role => role.id === config.bot.announcement_role)
    if (!announcementRole) {
        logger.error(`Could not find announcement role! Aborting! Was looking for role with id: ${config.bot.announcement_role}`, { guildId, requestId })
        return
    }

    const usersWhoWantRole: User[] = (await reaction.users.fetch()).filter(user => !user.bot).map(user => user)

    const allUsers = (await guild.members.fetch())

    const usersWhoHaveRole: GuildMember[] = allUsers
        .filter(member=> member.roles.cache
            .find(role => role.id === config.bot.announcement_role) !== undefined)
        .map(member => member)

    const usersWhoNeedRoleRevoked: GuildMember[] = usersWhoHaveRole
        .filter(userWhoHas => !usersWhoWantRole.map(wanter => wanter.id).includes(userWhoHas.id))

    const usersWhoDontHaveRole: GuildMember[] = allUsers
        .filter(member => member.roles.cache
            .find(role=> role.id === config.bot.announcement_role) === undefined)
        .map(member => member)

    const usersWhoNeedRole: GuildMember[] = usersWhoDontHaveRole
        .filter(userWhoNeeds => usersWhoWantRole.map(wanter => wanter.id).includes(userWhoNeeds.id))


    logger.debug(`Theses users will get the role removed: ${JSON.stringify(usersWhoNeedRoleRevoked)}`, {guildId, requestId})
    logger.debug(`Theses users will get the role added: ${JSON.stringify(usersWhoNeedRole)}`, {guildId, requestId})

    usersWhoNeedRoleRevoked.forEach(user => user.roles.remove(announcementRole))
    usersWhoNeedRole.forEach(user => user.roles.add(announcementRole))
}