import Discord, { CommandInteraction, GuildMember, Message, MessageActionRow, MessageButton } from "discord.js";
import { SelectMenuOption, SlashCommandSubcommandBuilder } from "@discordjs/builders";
import { WrappedCheck } from "jshaiku";
import EmojiEmbed from "../../utils/generateEmojiEmbed.js";
import getEmojiByName from "../../utils/getEmojiByName.js";
import addPlural from "../../utils/plurals.js";
import client from "../../utils/client.js";

const command = (builder: SlashCommandSubcommandBuilder) =>
    builder
    .setName("track")
    .setDescription("Moves a user along a role track")
    .addUserOption(option => option.setName("user").setDescription("The user to manage").setRequired(true))

const generateFromTrack = (position: number, active: any, size: number, disabled: any) => {
    active = active ? "ACTIVE" : "INACTIVE"
    disabled = disabled ? "GREY." : ""
    if (position == 0 && size == 1) return "TRACKS.SINGLE." + disabled + active
    if (position == size - 1) return "TRACKS.VERTICAL.BOTTOM." + disabled + active
    if (position == 0) return "TRACKS.VERTICAL.TOP." + disabled + active
    return "TRACKS.VERTICAL.MIDDLE." + disabled + active
}

const callback = async (interaction: CommandInteraction): Promise<any> => {
    const { renderUser } = client.logger;
    const member = interaction.options.getMember("user") as GuildMember;
    const guild = interaction.guild;
    let config = await client.database.guilds.read(guild.id);
    await interaction.reply({embeds: [new EmojiEmbed()
        .setEmoji("NUCLEUS.LOADING")
        .setTitle("Loading")
        .setStatus("Danger")
    ], ephemeral: true})
    let track = 0
    let generated;
    const roles = await guild.roles.fetch()
    let memberRoles = await member.roles
    let managed
    while (true) {
        let data = config.tracks[track]
        if (data.manageableBy !== undefined) managed = data.manageableBy.some(element => {return memberRoles.cache.has(element)})
        else managed = false
        let dropdown = new Discord.MessageSelectMenu().addOptions(config.tracks.map((option, index) => {
            let hasRoleInTrack = option.track.some(element => {return memberRoles.cache.has(element)})
            return new SelectMenuOption({
                default: index == track,
                label: option.name,
                value: index.toString(),
                description: option.track.length == 0 ? "No" : addPlural(option.track.length, "role"),
                emoji: client.emojis.resolve(getEmojiByName("TRACKS.SINGLE." + (hasRoleInTrack ? "ACTIVE" : "INACTIVE"), "id"))
            })
        })).setCustomId("select").setMaxValues(1)
        let allowed = []
        generated = "**Track:** " + data.name + "\n" + "**Member:** " + renderUser(member.user) + "\n"
        generated += (data.nullable ? "Members do not need a role in this track" : "A role in this track is required") + "\n"
        generated += (data.retainPrevious ? "When promoted, the user keeps previous roles" : "Members will lose their current role when promoted") + "\n"
        generated += "\n" + data.track.map((role, index) => {
            let allow = (roles.get(role).position >= (interaction.member as GuildMember).roles.highest.position) && !managed
            allowed.push(!allow)
            return getEmojiByName(generateFromTrack(
                index,
                memberRoles.cache.has(role),
                data.track.length,
                allow
            )) + " " +
            roles.get(role).name + " [<@&" + roles.get(role).id + ">]"
        }).join("\n")
        let selected = [];
        for (let i = 0; i < data.track.length; i++) {
            if (memberRoles.cache.has(data.track[i])) selected.push(data.track[i])
        }
        let conflict = data.retainPrevious ? false : selected.length > 1;
        let conflictDropdown
        let currentRoleIndex
        if (conflict) {
            generated += `\n\n${getEmojiByName(`PUNISH.WARN.${managed ? "YELLOW" : "RED"}`)} This user has ${selected.length} roles from this track. `
            conflictDropdown = []
            if (
                (roles.get(selected[0]).position < memberRoles.highest.position) || managed
            ) {
                generated +=  `In order to promote or demote this user, you must select which role the member should keep.`
                selected.forEach(role => {
                    conflictDropdown.push(new SelectMenuOption({
                        label: roles.get(role).name,
                        value: roles.get(role).id,
                    }))
                })
                conflictDropdown = [new Discord.MessageSelectMenu()
                    .addOptions(conflictDropdown)
                    .setCustomId("conflict")
                    .setMaxValues(1)
                    .setPlaceholder("Select a role to keep")]
            } else {
                generated += "You don't have permission to manage one or more of the users roles, and therefore can't select one to keep."
            }
        } else {
            currentRoleIndex = selected.length == 0 ? -1 : data.track.indexOf(selected[0].toString())
        }
        let m = await interaction.editReply({embeds: [new EmojiEmbed()
            .setEmoji("TRACKS.ICON")
            .setTitle("Tracks")
            .setDescription(`${generated}`)
            .setStatus("Success")
        ], components: [
            new MessageActionRow().addComponents(dropdown)
        ]
        .concat(conflict && conflictDropdown.length ? [new MessageActionRow().addComponents(conflictDropdown)] : [])
        .concat([
            new MessageActionRow().addComponents([
                new MessageButton()
                    .setEmoji(getEmojiByName("CONTROL.UP", "id"))
                    .setLabel("Move up")
                    .setCustomId("promote")
                    .setStyle("SUCCESS")
                    .setDisabled(conflict || currentRoleIndex == 0 || (currentRoleIndex == -1 ? false : !allowed[currentRoleIndex - 1])),
                new MessageButton()
                    .setEmoji(getEmojiByName("CONTROL.DOWN", "id"))
                    .setLabel("Move down")
                    .setCustomId("demote")
                    .setStyle("DANGER")
                    .setDisabled(conflict || (
                        data.nullable ? currentRoleIndex <= -1 :
                        currentRoleIndex == data.track.length - 1 || currentRoleIndex <= -1
                    ) || !allowed[currentRoleIndex]),
            ])
        ])})
        let component;
        try {
            component = await (m as Message).awaitMessageComponent({time: 300000});
        } catch (e) {
            return
        }
        component.deferUpdate()
        if (component.customId == "conflict") {
            let rolesToRemove = selected.filter(role => role != component.values[0])
            await member.roles.remove(rolesToRemove)
        } else if (component.customId == "promote") {
            if (
                currentRoleIndex == -1 ? allowed[data.track.length - 1] :
                allowed[currentRoleIndex - 1] && allowed[currentRoleIndex]
            ) {
                if (currentRoleIndex == -1) {
                    await member.roles.add(data.track[data.track.length - 1])
                } else if (currentRoleIndex < data.track.length) {
                    if (!data.retainPrevious) await member.roles.remove(data.track[currentRoleIndex])
                    await member.roles.add(data.track[currentRoleIndex - 1])
                }
            }
        } else if (component.customId == "demote") {
            if(allowed[currentRoleIndex]) {
                if (currentRoleIndex == data.track.length - 1) {
                    if (data.nullable) await member.roles.remove(data.track[currentRoleIndex])
                } else if (currentRoleIndex > -1) {
                    await member.roles.remove(data.track[currentRoleIndex])
                    await member.roles.add(data.track[currentRoleIndex + 1])
                }
            }
        } else if (component.customId == "select") {
            track = component.values[0]
        }
    }
}

const check = async (interaction: CommandInteraction, defaultCheck: WrappedCheck) => {
    let tracks = (await client.database.guilds.read(interaction.guild.id)).tracks
    if (!tracks) throw "This server does not have any tracks"
    let member = (interaction.member as GuildMember)
    // Allow the owner to promote anyone
    if (member.id == interaction.guild.ownerId) return true
    // Check if the user can manage any of the tracks
    let managed = false
    tracks.forEach(element => {
        if (!element.track.manageableBy) return
        if (element.track.manageableBy.some(role => member.roles.cache.has(role))) managed = true
    });
    // Check if the user has manage_roles permission
    if (!managed && ! member.permissions.has("MANAGE_ROLES")) throw "You do not have the Manage roles permission";
    // Allow track
    return true;
}

export { command };
export { callback };
export { check };