import { ActionRowBuilder, APIMessageComponentEmoji, ButtonBuilder, ButtonInteraction, ButtonStyle, Collection, CommandInteraction, GuildMember, Message, ModalBuilder, ModalSubmitInteraction, Role, RoleSelectMenuBuilder, RoleSelectMenuInteraction, SlashCommandSubcommandBuilder, StringSelectMenuBuilder, StringSelectMenuInteraction, StringSelectMenuOptionBuilder, TextInputBuilder, TextInputStyle } from "discord.js";
import client from "../../utils/client.js";
import createPageIndicator, { createVerticalTrack } from "../../utils/createPageIndicator.js";
import { LoadingEmbed } from "../../utils/defaults.js";
import EmojiEmbed from "../../utils/generateEmojiEmbed.js";
import getEmojiByName from "../../utils/getEmojiByName.js";
import ellipsis from "../../utils/ellipsis.js";
import { modalInteractionCollector } from "../../utils/dualCollector.js";

const command = (builder: SlashCommandSubcommandBuilder) =>
    builder
        .setName("tracks")
        .setDescription("Manage the tracks for the server")

interface ObjectSchema {
    name: string;
    retainPrevious: boolean;
    nullable: boolean;
    track: string[];
    manageableBy: string[];
}

const editName = async (i: ButtonInteraction, interaction: StringSelectMenuInteraction | ButtonInteraction, m: Message, current?: string) => {

    let name = current ?? "";
    const modal = new ModalBuilder()
        .setTitle("Edit Name and Description")
        .setCustomId("editNameDescription")
        .addComponents(
            new ActionRowBuilder<TextInputBuilder>()
                .addComponents(
                    new TextInputBuilder()
                        .setLabel("Name")
                        .setCustomId("name")
                        .setPlaceholder("Name here...") // TODO: Make better placeholder
                        .setStyle(TextInputStyle.Short)
                        .setValue(name ?? "")
                        .setRequired(true)
                )
        )
    const button = new ActionRowBuilder<ButtonBuilder>()
        .addComponents(
            new ButtonBuilder()
                .setCustomId("back")
                .setLabel("Back")
                .setStyle(ButtonStyle.Secondary)
                .setEmoji(getEmojiByName("CONTROL.LEFT", "id") as APIMessageComponentEmoji)
        )

    await i.showModal(modal)
    await interaction.editReply({
        embeds: [
            new EmojiEmbed()
                .setTitle("Tracks")
                .setDescription("Modal opened. If you can't see it, click back and try again.")
                .setStatus("Success")
        ],
        components: [button]
    });

    let out: ModalSubmitInteraction | null;
    try {
        out = await modalInteractionCollector(
            m,
            (m) => m.channel!.id === interaction.channel!.id,
            (_) => true
        ) as ModalSubmitInteraction | null;
    } catch (e) {
        console.error(e);
        out = null;
    }
    if(!out) return name;
    if (out.isButton()) return name;
    if(!out.fields) return name;
    name = out.fields.fields.find((f) => f.customId === "name")?.value ?? name;
    return name

}

const reorderTracks = async (interaction: ButtonInteraction, m: Message, roles: Collection<string, Role>, currentObj: string[]) => {
    let reorderRow = new ActionRowBuilder<StringSelectMenuBuilder>()
        .addComponents(
            new StringSelectMenuBuilder()
                .setCustomId("reorder")
                .setPlaceholder("Select all roles in the order you want users to gain them (Lowest to highest rank).")
                .setMinValues(currentObj.length)
                .setMaxValues(currentObj.length)
                .addOptions(
                    currentObj.map((o, i) => new StringSelectMenuOptionBuilder()
                        .setLabel(roles.get(o)!.name)
                        .setValue(i.toString())
                    )
                )
        );
    let buttonRow = new ActionRowBuilder<ButtonBuilder>()
        .addComponents(
            new ButtonBuilder()
                .setCustomId("back")
                .setLabel("Back")
                .setStyle(ButtonStyle.Secondary)
                .setEmoji(getEmojiByName("CONTROL.LEFT", "id") as APIMessageComponentEmoji)
        )
    await interaction.editReply({
        embeds: [
            new EmojiEmbed()
                .setTitle("Tracks")
                .setDescription("Select all roles in the order you want users to gain them (Lowest to highest rank).")
                .setStatus("Success")
        ],
        components: [reorderRow, buttonRow]
    });
    let out: StringSelectMenuInteraction | ButtonInteraction | null;
    try {
        out = await m.awaitMessageComponent({
            filter: (i) => i.channel!.id === interaction.channel!.id,
            time: 300000
        }) as StringSelectMenuInteraction | ButtonInteraction | null;
    } catch (e) {
        console.error(e);
        out = null;
    }
    if(!out) return;
    out.deferUpdate();
    if (out.isButton()) return;
    if(!out.values) return;
    const values = out.values;

    const newOrder: string[] = currentObj.map((_, i) => {
        const index = values.findIndex(v => v === i.toString());
        return currentObj[index];
    }) as string[];

    return newOrder;
}

const editTrack = async (interaction: ButtonInteraction | StringSelectMenuInteraction, message: Message, roles: Collection<string, Role>, current?: ObjectSchema) => {
    if(!current) {
        current = {
            name: "",
            retainPrevious: false,
            nullable: false,
            track: [],
            manageableBy: []
        }
    }
    const buttons = new ActionRowBuilder<ButtonBuilder>()
        .addComponents(
            new ButtonBuilder()
                .setCustomId("back")
                .setLabel("Back")
                .setStyle(ButtonStyle.Secondary)
                .setEmoji(getEmojiByName("CONTROL.LEFT", "id") as APIMessageComponentEmoji),
            new ButtonBuilder()
                .setCustomId("edit")
                .setLabel("Edit Name")
                .setStyle(ButtonStyle.Primary)
                .setEmoji(getEmojiByName("ICONS.EDIT", "id") as APIMessageComponentEmoji),
            new ButtonBuilder()
                .setCustomId("reorder")
                .setLabel("Reorder")
                .setStyle(ButtonStyle.Primary)
                .setEmoji(getEmojiByName("ICONS.REORDER", "id") as APIMessageComponentEmoji),
        );
    const roleSelect = new ActionRowBuilder<RoleSelectMenuBuilder>()
        .addComponents(
            new RoleSelectMenuBuilder()
                .setCustomId("addRole")
                .setPlaceholder("Select a role to add")
        );
    let closed = false;
    do {
        const editableRoles: string[] = current.track.map((r) => {
            if(!(roles.get(r)!.position >= (interaction.member as GuildMember).roles.highest.position)) return r;
        }).filter(v => v !== undefined) as string[];
        const selectMenu = new ActionRowBuilder<StringSelectMenuBuilder>()
            .addComponents(
                new StringSelectMenuBuilder()
                    .setCustomId("removeRole")
                    .setPlaceholder("Select a role to remove")
                    .addOptions(
                        editableRoles.map((r, i) => {
                            return new StringSelectMenuOptionBuilder()
                            .setLabel(r)
                            .setValue(i.toString())}
                        )
                    )
            );
        let allowed: boolean[] = [];
        for (const role of current.track) {
            const disabled: boolean =
                roles.get(role)!.position >= (interaction.member as GuildMember).roles.highest.position;
            allowed.push(disabled)
        }

        const embed = new EmojiEmbed()
            .setTitle("Tracks")
            .setDescription(
                `**Currently Editing:** ${current.name}\n\n` +
                `${getEmojiByName} Members ${current.nullable ? "don't " : ""}need a role in this track` +
                `${getEmojiByName} Members ${current.retainPrevious ? "don't " : ""}keep all roles below their current highest` +
                createVerticalTrack(current.track, new Array(current.track.length).fill(false), allowed)
            )

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

        let out: ButtonInteraction | RoleSelectMenuInteraction | StringSelectMenuInteraction | null;

        try {
            out = await message.awaitMessageComponent({
                filter: (i) => i.channel!.id === interaction.channel!.id,
                time: 300000
            }) as ButtonInteraction | RoleSelectMenuInteraction | StringSelectMenuInteraction | null;
        } catch (e) {
            console.error(e);
            out = null;
        }

        if(!out) return;
        if (out.isButton()) {
            out.deferUpdate();
            switch(out.customId) {
                case "back":
                    closed = true;
                    break;
                case "edit":
                    current.name = (await editName(out, interaction, message, current.name))!;
                    break;
                case "reorder":
                    current.track = (await reorderTracks(out, message, roles, current.track))!;
            }
        } else if (out.isStringSelectMenu()) {
            out.deferUpdate();
            switch(out.customId) {
                case "removeRole":
                    const index = current.track.findIndex(v => v === editableRoles[parseInt((out! as StringSelectMenuInteraction).values![0]!)]);
                    current.track.splice(index, 1);
                    break;
            }
        } else {
            switch(out.customId) {
                case "addRole":
                    const role = out.values![0]!;
                    if(!current.track.includes(role)) {
                        current.track.push(role);
                    }
                    out.reply({content: "That role is already on this track", ephemeral: true})
                    break;
            }
        }

    } while(!closed);
    return current;
}

const callback = async (interaction: CommandInteraction) => {

    const m = await interaction.reply({embeds: LoadingEmbed, fetchReply: true, ephemeral: true})
    const config = await client.database.guilds.read(interaction.guild!.id);
    const tracks: ObjectSchema[] = config.tracks;
    const roles = await interaction.guild!.roles.fetch();
    const memberRoles = interaction.member!.roles;
    const member = interaction.member as GuildMember;

    let page = 0;
    let closed = false;
    let modified = false;

    do {
        const embed = new EmojiEmbed()
            .setTitle("Track Settings")
            .setEmoji("TRACKS.ICON")
            .setStatus("Success");
        const noTracks = config.tracks.length === 0;
        let current: ObjectSchema;

        const pageSelect = new StringSelectMenuBuilder()
            .setCustomId("page")
            .setPlaceholder("Select a track to manage");
        const actionSelect = new StringSelectMenuBuilder()
            .setCustomId("action")
            .setPlaceholder("Perform an action")
            .addOptions(
                new StringSelectMenuOptionBuilder()
                    .setLabel("Edit")
                    .setDescription("Edit this track")
                    .setValue("edit")
                    .setEmoji(getEmojiByName("ICONS.EDIT", "id") as APIMessageComponentEmoji),
                new StringSelectMenuOptionBuilder()
                    .setLabel("Delete")
                    .setDescription("Delete this track")
                    .setValue("delete")
                    .setEmoji(getEmojiByName("TICKETS.ISSUE", "id") as APIMessageComponentEmoji)
        );
        const buttonRow = new ActionRowBuilder<ButtonBuilder>()
            .addComponents(
                new ButtonBuilder()
                    .setCustomId("back")
                    .setStyle(ButtonStyle.Primary)
                    .setEmoji(getEmojiByName("CONTROL.LEFT", "id") as APIMessageComponentEmoji)
                    .setDisabled(page === 0),
                new ButtonBuilder()
                    .setCustomId("next")
                    .setEmoji(getEmojiByName("CONTROL.RIGHT", "id") as APIMessageComponentEmoji)
                    .setStyle(ButtonStyle.Primary)
                    .setDisabled(page === Object.keys(tracks).length - 1),
                new ButtonBuilder()
                    .setCustomId("add")
                    .setLabel("New Track")
                    .setEmoji(getEmojiByName("TICKETS.SUGGESTION", "id") as APIMessageComponentEmoji)
                    .setStyle(ButtonStyle.Secondary)
                    .setDisabled(Object.keys(tracks).length >= 24),
                new ButtonBuilder()
                    .setCustomId("save")
                    .setLabel("Save")
                    .setEmoji(getEmojiByName("ICONS.SAVE", "id") as APIMessageComponentEmoji)
                    .setStyle(ButtonStyle.Success)
                    .setDisabled(!modified),
            );
        if(noTracks) {
            embed.setDescription("No tracks have been set up yet. Use the button below to add one.\n\n" +
                createPageIndicator(1, 1, undefined, true)
            );
            pageSelect.setDisabled(true);
            actionSelect.setDisabled(true);
            pageSelect.addOptions(new StringSelectMenuOptionBuilder()
                .setLabel("No tracks")
                .setValue("none")
            );
        } else {
            page = Math.min(page, Object.keys(tracks).length - 1);
            current = tracks[page]!;
            embed.setDescription(`**Currently Editing:** ${current.name}\n\n` +
                `${getEmojiByName("CONTROL." + (current.nullable ? "CROSS" : "TICK"))} Members ${current.nullable ? "don't " : ""}need a role in this track\n` +
                `${getEmojiByName("CONTROL." + (current.retainPrevious ? "TICK" : "CROSS"))} Members ${current.retainPrevious ? "" : "don't "}keep all roles below their current highest\n\n` +
                createVerticalTrack(current.track, new Array(current.track.length).fill(false)) +
                `\n${createPageIndicator(config.tracks.length, page)}`
            );

            pageSelect.addOptions(
                tracks.map((key: ObjectSchema, index) => {
                    return new StringSelectMenuOptionBuilder()
                        .setLabel(ellipsis(key.name, 50))
                        .setDescription(ellipsis(roles.get(key.track[0]!)?.name!, 50))
                        .setValue(index.toString());
                })
            );

        }

        await interaction.editReply({embeds: [embed], components: [new ActionRowBuilder<StringSelectMenuBuilder>().addComponents(actionSelect), new ActionRowBuilder<StringSelectMenuBuilder>().addComponents(pageSelect), buttonRow]});
        let i: StringSelectMenuInteraction | ButtonInteraction;
        try {
            i = await m.awaitMessageComponent({ time: 300000, filter: (i) => i.user.id === interaction.user.id && i.message.id === m.id && i.channelId === interaction.channelId}) as ButtonInteraction | StringSelectMenuInteraction;
        } catch (e) {
            closed = true;
            break;
        }

        await i.deferUpdate();
        if (i.isButton()) {
            switch (i.customId) {
                case "back":
                    page--;
                    break;
                case "next":
                    page++;
                    break;
                case "add":
                    let newPage = await editTrack(i, m, roles)
                    if(!newPage) break;
                    tracks.push();
                    page = tracks.length - 1;
                    break;
                case "save":
                    // client.database.guilds.write(interaction.guild!.id, {"roleMenu.options": tracks});  // TODO
                    modified = false;
                    break;
            }
        } else if (i.isStringSelectMenu()) {
            switch (i.customId) {
                case "action":
                    switch(i.values[0]) {
                        case "edit":
                            let edited = await editTrack(i, m, roles, current!);
                            if(!edited) break;
                            tracks[page] = edited;
                            modified = true;
                            break;
                        case "delete":
                            if(page === 0 && tracks.keys.length - 1 > 0) page++;
                            else page--;
                            tracks.splice(page, 1);
                            break;
                    }
                    break;
                case "page":
                    page = parseInt(i.values[0]!);
                    break;
            }
        }

    } while (!closed)

}

const check = (interaction: CommandInteraction, _partial: boolean = false) => {
    const member = interaction.member as GuildMember;
    if (!member.permissions.has("ManageRoles"))
        return "You must have the *Manage Server* permission to use this command";
    return true;
};

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