import type Discord from "discord.js";
import { ActionRowBuilder, APIMessageComponentEmoji, ButtonBuilder, ButtonInteraction, ButtonStyle, CommandInteraction, Message, ModalBuilder, RoleSelectMenuBuilder, RoleSelectMenuInteraction, StringSelectMenuBuilder, StringSelectMenuInteraction, StringSelectMenuOptionBuilder, TextInputBuilder, TextInputStyle } from "discord.js";
import type { SlashCommandSubcommandBuilder } from "discord.js";
import EmojiEmbed from "../../utils/generateEmojiEmbed.js";
import { LoadingEmbed } from "../../utils/defaults.js";
import client from "../../utils/client.js";
import getEmojiByName from "../../utils/getEmojiByName.js";
import createPageIndicator from "../../utils/createPageIndicator.js";
import { configToDropdown } from "../../actions/roleMenu.js";
import { modalInteractionCollector } from "../../utils/dualCollector.js";
import ellipsis from "../../utils/ellipsis.js";
import lodash from 'lodash';

const isEqual = lodash.isEqual;

const command = (builder: SlashCommandSubcommandBuilder) =>
    builder
        .setName("rolemenu")
        .setDescription("rolemenu")

interface ObjectSchema {
    name: string;
    description: string;
    min: number;
    max: number;
    options: {
        name: string;
        description: string | null;
        role: string;
    }[];
}

const defaultRolePageConfig = {
    name: "Role Menu Page",
    description: "A new role menu page",
    min: 0,
    max: 0,
    options: [
        {name: "Role 1", description: null, role: "No role set"}
    ]
}

const reorderRoleMenuPages = async (interaction: CommandInteraction, m: Message, currentObj: ObjectSchema[]) => {
    const reorderRow = new ActionRowBuilder<StringSelectMenuBuilder>()
        .addComponents(
            new StringSelectMenuBuilder()
                .setCustomId("reorder")
                .setPlaceholder("Select all pages in the order you want them to appear.")
                .setMinValues(currentObj.length)
                .setMaxValues(currentObj.length)
                .addOptions(
                    currentObj.map((o, i) => new StringSelectMenuOptionBuilder()
                        .setLabel(o.name)
                        .setValue(i.toString())
                    )
                )
        );
    const 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("Role Menu")
                .setDescription("Select pages in the order you want them to appear.")
                .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;
    const values = out.values;

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

    return newOrder;
}

const editNameDescription = async (i: ButtonInteraction, interaction: StringSelectMenuInteraction | ButtonInteraction, m: Message, data: {name?: string, description?: string}) => {

    let {name, description} = data;
    const modal = new ModalBuilder()
        .setTitle("Edit Name and Description")
        .setCustomId("editNameDescription")
        .addComponents(
            new ActionRowBuilder<TextInputBuilder>()
                .addComponents(
                    new TextInputBuilder()
                        .setLabel("Name")
                        .setCustomId("name")
                        .setPlaceholder("The name of the role (e.g. Programmer)")
                        .setStyle(TextInputStyle.Short)
                        .setValue(name ?? "")
                        .setRequired(true)
                ),
            new ActionRowBuilder<TextInputBuilder>()
                .addComponents(
                    new TextInputBuilder()
                        .setLabel("Description")
                        .setCustomId("description")
                        .setPlaceholder("A short description of the role (e.g. A role for people who code)")
                        .setStyle(TextInputStyle.Short)
                        .setValue(description ?? "")
                )
        )
    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("Role Menu")
                .setDescription("Modal opened. If you can't see it, click back and try again.")
                .setStatus("Success")
        ],
        components: [button]
    });

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

}

const editRoleMenuPage = async (interaction: StringSelectMenuInteraction | ButtonInteraction, m: Message, data?: ObjectSchema): Promise<ObjectSchema | null> => {
    if (!data) data = {
        name: "Role Menu Page",
        description: "A new role menu page",
        min: 0,
        max: 0,
        options: []
    };
    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")
                .setStyle(ButtonStyle.Primary)
                .setEmoji(getEmojiByName("ICONS.EDIT", "id") as APIMessageComponentEmoji),
            new ButtonBuilder()
                .setCustomId("addRole")
                .setLabel("Add Role")
                .setStyle(ButtonStyle.Secondary)
                .setEmoji(getEmojiByName("TICKETS.SUGGESTION", "id") as APIMessageComponentEmoji)
        );

    let back = false
    if(data.options.length === 0) {
        data.options = [
            {name: "Role 1", description: null, role: "No role set"}
        ]
    }
    do {
        const previewSelect = configToDropdown("Edit Roles", {name: data.name, description: data.description, min: 1, max: 1, options: data.options});
        const embed = new EmojiEmbed()
            .setTitle(`${data.name}`)
            .setStatus("Success")
            .setDescription(
                `**Description:**\n> ${data.description}\n\n` +
                `**Min:** ${data.min}` + (data.min === 0 ? " (Members will be given a skip button)" : "") + "\n" +
                `**Max:** ${data.max}\n`
            )

        interaction.editReply({embeds: [embed], components: [previewSelect, buttons]});
        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) {
            back = true;
            break;
        }

        if (i.isStringSelectMenu()) {
            if(i.customId === "roles") {
                await i.deferUpdate();
                await createRoleMenuOptionPage(interaction, m, data.options.find((o) => o.role === (i as StringSelectMenuInteraction).values[0]));
            }
        } else if (i.isButton()) {
            switch (i.customId) {
                case "back": {
                    await i.deferUpdate();
                    back = true;
                    break;
                }
                case "edit": {
                    const [name, description] = await editNameDescription(i, interaction, m, data);
                    data.name = name ? name : data.name;
                    data.description = description ? description : data.description;
                    break;
                }
                case "addRole": {
                    await i.deferUpdate();
                    data.options.push(await createRoleMenuOptionPage(interaction, m));
                    break;
                }
            }
        }

    } while (!back);
    if(isEqual(data, defaultRolePageConfig)) return null;
    return data;
}

const createRoleMenuOptionPage = async (interaction: StringSelectMenuInteraction | ButtonInteraction, m: Message, data?: {name: string; description: string | null; role: string}) => {
    const { renderRole} = client.logger;
    if (!data) data = {
        name: "New role Menu Option",
        description: null,
        role: ""
    };
    let back = false;
    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 Details")
                .setStyle(ButtonStyle.Primary)
                .setEmoji(getEmojiByName("ICONS.EDIT", "id") as APIMessageComponentEmoji)
        );
    do {
        const roleSelect = new RoleSelectMenuBuilder().setCustomId("role").setPlaceholder(data.role ? "Set role to" : "Set the role");
        const embed = new EmojiEmbed()
            .setTitle(`${data.name}`)
            .setStatus("Success")
            .setDescription(
                `**Description:**\n> ${data.description ?? "No description set"}\n\n` +
                `**Role:** ${data.role ? renderRole((await interaction.guild!.roles.fetch(data.role))!) : "No role set"}\n`
            )

        interaction.editReply({embeds: [embed], components: [new ActionRowBuilder<RoleSelectMenuBuilder>().addComponents(roleSelect), buttons]});

        let i: RoleSelectMenuInteraction | 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 | RoleSelectMenuInteraction;
        } catch (e) {
            back = true;
            break;
        }

        if (i.isRoleSelectMenu()) {
            if(i.customId === "role") {
                await i.deferUpdate();
                data.role = (i as RoleSelectMenuInteraction).values[0]!;
            }
        } else if (i.isButton()) {
            switch (i.customId) {
                case "back": {
                    await i.deferUpdate();
                    back = true;
                    break;
                }
                case "edit": {
                    await i.deferUpdate();
                    const [name, description] = await editNameDescription(i, interaction, m, data as {name: string; description: string});
                    data.name = name ? name : data.name;
                    data.description = description ? description : data.description;
                    break;
                }
            }
        }
    } while (!back);
    return data;
}

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

    let page = 0;
    let closed = false;
    const config = await client.database.guilds.read(interaction.guild.id);
    let currentObject: ObjectSchema[] = config.roleMenu.options;
    let modified = false;
    do {
        const embed = new EmojiEmbed()
            .setTitle("Role Menu")
            .setEmoji("GUILD.GREEN")
            .setStatus("Success");
        const noRoleMenus = currentObject.length === 0;
        let current: ObjectSchema;

        const pageSelect = new StringSelectMenuBuilder()
            .setCustomId("page")
            .setPlaceholder("Select a Role Menu page to manage");
        const actionSelect = new StringSelectMenuBuilder()
            .setCustomId("action")
            .setPlaceholder("Perform an action")
            .addOptions(
                new StringSelectMenuOptionBuilder()
                    .setLabel("Edit")
                    .setDescription("Edit this page")
                    .setValue("edit")
                    .setEmoji(getEmojiByName("ICONS.EDIT", "id") as APIMessageComponentEmoji),
                new StringSelectMenuOptionBuilder()
                    .setLabel("Delete")
                    .setDescription("Delete this page")
                    .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(currentObject).length - 1),
                new ButtonBuilder()
                    .setCustomId("add")
                    .setLabel("New Page")
                    .setEmoji(getEmojiByName("TICKETS.SUGGESTION", "id") as APIMessageComponentEmoji)
                    .setStyle(ButtonStyle.Secondary)
                    .setDisabled(Object.keys(currentObject).length >= 24),
                new ButtonBuilder()
                    .setCustomId("reorder")
                    .setLabel("Reorder Pages")
                    .setEmoji(getEmojiByName("ICONS.REORDER", "id") as APIMessageComponentEmoji)
                    .setStyle(ButtonStyle.Secondary)
                    .setDisabled(Object.keys(currentObject).length <= 1),
                new ButtonBuilder()
                    .setCustomId("save")
                    .setLabel("Save")
                    .setEmoji(getEmojiByName("ICONS.SAVE", "id") as APIMessageComponentEmoji)
                    .setStyle(ButtonStyle.Success)
                    .setDisabled(!modified),
            );
        if(noRoleMenus) {
            embed.setDescription("No role menu pages 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 role menu pages")
                .setValue("none")
            );
        } else {
            page = Math.min(page, Object.keys(currentObject).length - 1);
            current = currentObject[page]!;
            embed.setDescription(`**Currently Editing:** ${current.name}\n\n` +
                `**Description:**\n> ${current.description}\n` +
                `\n\n${createPageIndicator(Object.keys(config.roleMenu.options).length, page)}`
            );

            pageSelect.addOptions(
                currentObject.map((key: ObjectSchema, index) => {
                    return new StringSelectMenuOptionBuilder()
                        .setLabel(ellipsis(key.name, 50))
                        .setDescription(ellipsis(key.description, 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;
            continue;
        }

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

    } while (!closed);
    await interaction.deleteReply()
};

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

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