import {
    ActionRowBuilder,
    APIMessageComponentEmoji,
    ButtonBuilder,
    ButtonInteraction,
    ButtonStyle,
    CommandInteraction,
    GuildMember,
    Role,
    RoleSelectMenuBuilder,
    RoleSelectMenuInteraction,
    UserSelectMenuBuilder,
    UserSelectMenuInteraction
} from "discord.js";
import type { SlashCommandSubcommandBuilder } from "discord.js";
import client from "../../utils/client.js";
import EmojiEmbed from "../../utils/generateEmojiEmbed.js";
import { LoadingEmbed } from "../../utils/defaults.js";
import getEmojiByName from "../../utils/getEmojiByName.js";
import listToAndMore from "../../utils/listToAndMore.js";

const { renderUser } = client.logger;

const canEdit = (role: Role, member: GuildMember, me: GuildMember): [string, boolean] => {
    if (role.position >= me.roles.highest.position || role.position >= member.roles.highest.position)
        return [`~~<@&${role.id}>~~`, false];
    return [`<@&${role.id}>`, true];
};

const command = (builder: SlashCommandSubcommandBuilder) =>
    builder
        .setName("role")
        .setDescription("Gives or removes a role from someone")
        .addUserOption((option) => option.setName("user").setDescription("The user to give or remove the role from"));

const callback = async (interaction: CommandInteraction): Promise<unknown> => {
    const m = await interaction.reply({ embeds: LoadingEmbed, fetchReply: true, ephemeral: true });

    let member = interaction.options.getMember("user") as GuildMember | null;

    if (!member) {
        const memberEmbed = new EmojiEmbed()
            .setTitle("Role")
            .setDescription(`Please choose a member to edit the roles of.`)
            .setEmoji("GUILD.ROLES.CREATE")
            .setStatus("Success");
        const memberChooser = new ActionRowBuilder<UserSelectMenuBuilder>().addComponents(
            new UserSelectMenuBuilder().setCustomId("memberChooser").setPlaceholder("Select a member")
        );
        await interaction.editReply({ embeds: [memberEmbed], components: [memberChooser] });

        const filter = (i: UserSelectMenuInteraction) =>
            i.customId === "memberChooser" && i.user.id === interaction.user.id;

        let i: UserSelectMenuInteraction | null;
        try {
            i = await m.awaitMessageComponent<5>({ filter, time: 300000 });
        } catch (e) {
            return;
        }

        memberEmbed.setDescription(`Editing roles for ${renderUser(i.values[0]!)}`);
        await i.deferUpdate();
        await interaction.editReply({ embeds: LoadingEmbed, components: [] });
        member = await interaction.guild?.members.fetch(i.values[0]!)!;
    }

    let closed = false;
    let rolesToChange: string[] = [];
    const roleAdd = new ActionRowBuilder<RoleSelectMenuBuilder>().addComponents(
        new RoleSelectMenuBuilder().setCustomId("roleAdd").setPlaceholder("Select a role to add").setMaxValues(25)
    );

    do {
        const removing = rolesToChange
            .filter((r) => member!.roles.cache.has(r))
            .map(
                (r) =>
                    canEdit(
                        interaction.guild?.roles.cache.get(r)!,
                        interaction.member as GuildMember,
                        interaction.guild?.members.me!
                    )[0]
            );
        const adding = rolesToChange
            .filter((r) => !member!.roles.cache.has(r))
            .map(
                (r) =>
                    canEdit(
                        interaction.guild?.roles.cache.get(r)!,
                        interaction.member as GuildMember,
                        interaction.guild?.members.me!
                    )[0]
            );
        const embed = new EmojiEmbed()
            .setTitle("Role")
            .setDescription(
                `${getEmojiByName("ICONS.EDIT")} Editing roles for <@${member.id}>\n\n` +
                    `Adding:\n` +
                    `${listToAndMore(adding.length > 0 ? adding : ["None"], 5)}\n` +
                    `Removing:\n` +
                    `${listToAndMore(removing.length > 0 ? removing : ["None"], 5)}\n`
            )
            .setEmoji("GUILD.ROLES.CREATE")
            .setStatus("Success");

        const buttons = new ActionRowBuilder<ButtonBuilder>().addComponents(
            new ButtonBuilder()
                .setCustomId("roleSave")
                .setLabel("Apply")
                .setEmoji(getEmojiByName("ICONS.SAVE", "id") as APIMessageComponentEmoji)
                .setStyle(ButtonStyle.Success),
            new ButtonBuilder()
                .setCustomId("roleDiscard")
                .setLabel("Reset")
                .setEmoji(getEmojiByName("CONTROL.CROSS", "id") as APIMessageComponentEmoji)
                .setStyle(ButtonStyle.Danger)
        );

        await interaction.editReply({ embeds: [embed], components: [roleAdd, buttons] });

        let i: RoleSelectMenuInteraction | ButtonInteraction | null;
        try {
            i = (await m.awaitMessageComponent({ filter: (i) => i.user.id === interaction.user.id, time: 300000 })) as
                | RoleSelectMenuInteraction
                | ButtonInteraction;
        } catch (e) {
            closed = true;
            continue;
        }

        await i.deferUpdate();
        if (i.isButton()) {
            switch (i.customId) {
                case "roleSave": {
                    const roles = rolesToChange.map((r) => interaction.guild?.roles.cache.get(r)!);
                    await interaction.editReply({ embeds: LoadingEmbed, components: [] });
                    const rolesToAdd: Role[] = [];
                    const rolesToRemove: Role[] = [];
                    for (const role of roles) {
                        if (!canEdit(role, interaction.member as GuildMember, interaction.guild?.members.me!)[1])
                            continue;
                        if (member.roles.cache.has(role.id)) {
                            rolesToRemove.push(role);
                        } else {
                            rolesToAdd.push(role);
                        }
                    }
                    await member.roles.add(rolesToAdd);
                    await member.roles.remove(rolesToRemove);
                    rolesToChange = [];
                    break;
                }
                case "roleDiscard": {
                    rolesToChange = [];
                    await interaction.editReply({ embeds: LoadingEmbed, components: [] });
                    break;
                }
            }
        } else {
            rolesToChange = i.values;
        }
    } while (!closed);
};

const check = (interaction: CommandInteraction, partial: boolean = false) => {
    const member = interaction.member as GuildMember;
    // Check if the user has manage_roles permission
    if (!member.permissions.has("ManageRoles")) return "You do not have the *Manage Roles* permission";
    if (partial) return true;
    if (!interaction.guild) return;
    const me = interaction.guild.members.me!;
    // Check if Nucleus has permission to role
    if (!me.permissions.has("ManageRoles")) return "I do not have the *Manage Roles* permission";
    // Allow the owner to role anyone
    if (member.id === interaction.guild.ownerId) return true;
    // Allow role
    return true;
};

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