import confirmationMessage from '../../utils/confirmationMessage.js';
import EmojiEmbed from '../../utils/generateEmojiEmbed.js';
import { LoadingEmbed } from './../../utils/defaultEmbeds.js';
import Discord, { ActionRowBuilder, ButtonBuilder, ButtonStyle, ContextMenuCommandBuilder, GuildTextBasedChannel, MessageContextMenuCommandInteraction } from "discord.js";
import client from "../../utils/client.js";
import getEmojiByName from '../../utils/getEmojiByName.js';

const command = new ContextMenuCommandBuilder()
    .setName("Purge up to here")


async function waitForButton(m: Discord.Message, member: Discord.GuildMember): Promise<boolean> {
    let component;
    try {
        component = m.awaitMessageComponent({ time: 200000, filter: (i) => i.user.id === member.id });
    } catch (e) {
        return false;
    }
    (await component).deferUpdate();
    return true;
}


const callback = async (interaction: MessageContextMenuCommandInteraction) => {
    await interaction.targetMessage.fetch();
    const targetMessage = interaction.targetMessage;
    const targetMember: Discord.User = targetMessage.author;
    let allowedMessage: Discord.Message | undefined = undefined;
    const channel = interaction.channel;
    if (!channel) return;
    await interaction.reply({ embeds: LoadingEmbed, ephemeral: true, fetchReply: true });
    // Option for "include this message"?
    // Option for "Only selected user"?

    const history: Discord.Collection<string, Discord.Message> = await channel.messages.fetch({ limit: 100 });
    if (Date.now() - targetMessage.createdTimestamp > 2 * 7 * 24 * 60 * 60 * 1000) {
        const m = await interaction.editReply({ embeds: [new EmojiEmbed()
            .setTitle("Purge")
            .setDescription("The message you selected is older than 2 weeks. Discord only allows bots to delete messages that are 2 weeks old or younger.")
            .setEmoji("CHANNEL.PURGE.RED")
            .setStatus("Danger")
        ], components: [
            new ActionRowBuilder<ButtonBuilder>().addComponents(
                new ButtonBuilder()
                    .setCustomId("oldest")
                    .setLabel("Select first allowed message")
                    .setStyle(ButtonStyle.Primary),
            )
        ]});
        if (!await waitForButton(m, interaction.member as Discord.GuildMember)) return;
    } else if (!history.has(targetMessage.id)) {
        const m = await interaction.editReply({ embeds: [new EmojiEmbed()
            .setTitle("Purge")
            .setDescription("The message you selected is not in the last 100 messages in this channel. Discord only allows bots to delete 100 messages at a time.")
            .setEmoji("CHANNEL.PURGE.YELLOW")
            .setStatus("Warning")
        ], components: [
            new ActionRowBuilder<ButtonBuilder>().addComponents(
                new ButtonBuilder()
                    .setCustomId("oldest")
                    .setLabel("Select first allowed message")
                    .setStyle(ButtonStyle.Primary),
            )
        ]});
        if (!await waitForButton(m, interaction.member as Discord.GuildMember)) return;
    } else {
        allowedMessage = targetMessage;
    }

    if (!allowedMessage) {
        // Find the oldest message thats younger than 2 weeks
        const messages = history.filter(m => Date.now() - m.createdTimestamp < 2 * 7 * 24 * 60 * 60 * 1000);
        allowedMessage = messages.sort((a, b) => a.createdTimestamp - b.createdTimestamp).first();
    }

    if (!allowedMessage) {
        await interaction.editReply({ embeds: [new EmojiEmbed()
            .setTitle("Purge")
            .setDescription("There are no valid messages in the last 100 messages. (No messages younger than 2 weeks)")
            .setEmoji("CHANNEL.PURGE.RED")
            .setStatus("Danger")
        ], components: [] });
        return;
    }

    let reason: string | null = null
    let confirmation;
    let chosen = false;
    let timedOut = false;
    let deleteSelected = true;
    let deleteUser = false;
    do {
        confirmation = await new confirmationMessage(interaction)
            .setEmoji("CHANNEL.PURGE.RED")
            .setTitle("Purge")
            .setDescription(
                `[[Selected Message]](${allowedMessage.url})\n\n` +
                (reason ? "\n> " + reason.replaceAll("\n", "\n> ") : "*No reason provided*") + "\n\n" +
                `Are you sure you want to delete all messages from below the selected message?`
            )
            .addCustomBoolean(
                "includeSelected",
                "Include selected message",
                false,
                undefined,
                "The selected message will be deleted as well.",
                "The selected message will not be deleted.",
                "CONTROL." + (deleteSelected ? "TICK" : "CROSS"),
                deleteSelected
            )
            .addCustomBoolean(
                "onlySelectedUser",
                "Only selected user",
                false,
                undefined,
                `Only messages from <@${targetMember.id}> will be deleted.`,
                `All messages will be deleted.`,
                "CONTROL." + (deleteUser ? "TICK" : "CROSS"),
                deleteUser
            )
            .setColor("Danger")
            .addReasonButton(reason ?? "")
            .send(true)
        reason = reason ?? ""
        if (confirmation.cancelled) timedOut = true;
        else if (confirmation.success !== undefined) chosen = true;
        else if (confirmation.newReason) reason = confirmation.newReason;
        else if (confirmation.components) {
            deleteSelected = confirmation.components["includeSelected"]!.active;
            deleteUser = confirmation.components["onlySelectedUser"]!.active;
        }
    } while (!chosen && !timedOut);
    if (timedOut) return;
    if (!confirmation.success) {
        await interaction.editReply({ embeds: [new EmojiEmbed()
            .setTitle("Purge")
            .setDescription("No changes were made")
            .setEmoji("CHANNEL.PURGE.GREEN")
            .setStatus("Success")
        ], components: [] });
        return;
    }
    const filteredMessages = history
        .filter(m => m.createdTimestamp >= allowedMessage!.createdTimestamp)  // older than selected
        .filter(m => deleteUser ? m.author.id === targetMember.id : true)  // only selected user
        .filter(m => deleteSelected ? true : m.id !== allowedMessage!.id)  // include selected

    const deleted = await (channel as GuildTextBasedChannel).bulkDelete(filteredMessages, true);
    if (deleted.size === 0) {
        return await interaction.editReply({
            embeds: [
                new EmojiEmbed()
                    .setEmoji("CHANNEL.PURGE.RED")
                    .setTitle("Purge")
                    .setDescription("No messages were deleted")
                    .setStatus("Danger")
            ],
            components: []
        });
    }
    if (deleteUser) {
        await client.database.history.create(
            "purge",
            interaction.guild!.id,
            targetMember,
            interaction.user,
            reason === "" ? "*No reason provided*" : reason,
            null,
            null,
            deleted.size.toString()
        );
    }
    const { log, NucleusColors, entry, renderUser, renderChannel } = client.logger;
    const data = {
        meta: {
            type: "channelPurge",
            displayName: "Channel Purged",
            calculateType: "messageDelete",
            color: NucleusColors.red,
            emoji: "PUNISH.BAN.RED",
            timestamp: new Date().getTime()
        },
        list: {
            memberId: entry(interaction.user.id, `\`${interaction.user.id}\``),
            purgedBy: entry(interaction.user.id, renderUser(interaction.user)),
            channel: entry(interaction.channel!.id, renderChannel(interaction.channel! as Discord.GuildChannel)),
            messagesCleared: entry(deleted.size.toString(), deleted.size.toString())
        },
        hidden: {
            guild: interaction.guild!.id
        }
    };
    log(data);
    let out = "";
    deleted.reverse().forEach((message) => {
        if (!message) {
            out += "Unknown message\n\n"
        } else {
            const author = message.author ?? { username: "Unknown", discriminator: "0000", id: "Unknown" };
            out += `${author.username}#${author.discriminator} (${author.id}) [${new Date(
                message.createdTimestamp
            ).toISOString()}]\n`;
            if (message.content) {
                const lines = message.content.split("\n");
                lines.forEach((line) => {
                    out += `> ${line}\n`;
                });
            }
            if (message.attachments.size > 0) {
                message.attachments.forEach((attachment) => {
                    out += `Attachment > ${attachment.url}\n`;
                });
            }
            out += "\n\n";
        }
    });
    const attachmentObject = {
        attachment: Buffer.from(out),
        name: `purge-${channel.id}-${Date.now()}.txt`,
        description: "Purge log"
    };
    const m = (await interaction.editReply({
        embeds: [
            new EmojiEmbed()
                .setEmoji("CHANNEL.PURGE.GREEN")
                .setTitle("Purge")
                .setDescription("Messages cleared")
                .setStatus("Success")
        ],
        components: [
            new Discord.ActionRowBuilder<ButtonBuilder>().addComponents([
                new Discord.ButtonBuilder()
                    .setCustomId("download")
                    .setLabel("Download transcript")
                    .setStyle(ButtonStyle.Success)
                    .setEmoji(getEmojiByName("CONTROL.DOWNLOAD", "id"))
            ])
        ]
    })) as Discord.Message;
    let component;
    try {
        component = await m.awaitMessageComponent({
            filter: (m) => m.user.id === interaction.user.id,
            time: 300000
        });
    } catch {
        return;
    }
    if (component.customId === "download") {
        interaction.editReply({
            embeds: [
                new EmojiEmbed()
                    .setEmoji("CHANNEL.PURGE.GREEN")
                    .setTitle("Purge")
                    .setDescription("Transcript uploaded above")
                    .setStatus("Success")
            ],
            components: [],
            files: [attachmentObject]
        });
    } else {
        interaction.editReply({
            embeds: [
                new EmojiEmbed()
                    .setEmoji("CHANNEL.PURGE.GREEN")
                    .setTitle("Purge")
                    .setDescription("Messages cleared")
                    .setStatus("Success")
            ],
            components: []
        });
    }
}

const check = async (_interaction: MessageContextMenuCommandInteraction) => {
    return true;
}

export { command, callback, check }