const path = require("path");
const Embed = require(path.join(__dirname, "../functions/embed"));
const Giveaways = require(path.join(__dirname, "../models/giveaways"));

// Constants
const EMOJIS = [
    { name: "1️⃣", id: 0 }, { name: "2️⃣", id: 1 }, { name: "3️⃣", id: 2 },
    { name: "4️⃣", id: 3 }, { name: "5️⃣", id: 4 }, { name: "6️⃣", id: 5 },
    { name: "7️⃣", id: 6 }, { name: "8️⃣", id: 7 }, { name: "9️⃣", id: 8 },
    { name: "🔟", id: 9 }, { name: "🛑", id: "stop" }
];
const COLORS_REGEX = /^([A-Z0-9]+)/;

/**
 * Handles message collector reaction removal
 * @param {Object} client - The client instance
 * @param {Object} message - The message object
 * @param {string} emojiId - The emoji ID
 * @param {Object} collector - The message collector
 * @returns {Promise<void>}
 */
async function handleMessageCollector(client, message, emojiId, collector) {
    const emoji = collector.rolesDone.find(e => e.emoji === emojiId);
    if (!emoji) return;

    collector.rolesDone = collector.rolesDone.filter(object => object.emoji !== emojiId);
    collector.roles.push([emoji.role, { name: emoji.name, colour: emoji.color }]);
    collector.regex.push(emoji.name);

    const emote = COLORS_REGEX.test(emojiId) ? `:${emojiId}:` : emojiId;
    const content = collector.type === "content"
        ? { content: message.content.replace(`${emote} $\\text{\\textcolor{${emoji.color}}{${emoji.name}}}$`, `{role:${emoji.name}}`) }
        : { embeds: [new Embed().setColor("#A52F05").setDescription(client.messages.get(message.id).embeds[0].description.replace(`{role:${collector.regex[0]}}`, `:${emojiId}: $\\text{\\textcolor{${collector.roles[0][1].colour?.includes("linear-gradient") ? '#000000' : collector.roles[0][1].colour}}{${collector.roles[0][1].name}}}$`))] };

    return message.edit(content).catch(() => {});
}

/**
 * Handles poll reaction removal
 * @param {Object} client - The client instance
 * @param {Object} message - The message object
 * @param {Object} pollCheck - The poll check object
 * @param {string} userId - The user ID
 * @param {string} emojiId - The emoji ID
 * @returns {Promise<void>}
 */
async function handlePoll(client, message, pollCheck, userId, emojiId) {
    if (client.reactions.get(userId)) {
        return client.users.get(userId)?.openDM()
            .then(dm => dm.sendMessage(client.translate.get(pollCheck.language, "Events.messageReactionRemove.tooFast")))
            .catch(() => {});
    }

    const convert = EMOJIS.findIndex(e => e.name === emojiId);
    if (convert !== 0 && convert === 10 || convert === -1) return;

    if (!pollCheck.users.includes(userId)) return;

    const tooMuch = [];
    if (pollCheck.poll.options.description.length > 80) {
        tooMuch.push(`**${client.translate.get(pollCheck.language, "Events.messageReactionRemove.title")}**: ${pollCheck.poll.options.description}`);
    }
    pollCheck.poll.voteOptions.name.filter(e => e).forEach((e, i) => {
        if (e.length > 70) {
            tooMuch.push(`**${i + 1}.** ${e}`);
        }
    });

    pollCheck.users = pollCheck.users.filter(object => object !== userId);
    const user = client.users.get(userId) || await client.users.fetch(userId);
    await pollCheck.poll.removeVote(convert, userId, 'https://chat.f95.io/api/users/01HATCWS7XZ7KEHW64AV20SMKR/default_avatar', message.id);

    await message.edit({
        embeds: [new Embed()
            .setDescription(tooMuch.length > 0 ? tooMuch.join("\n") : null)
            .setMedia(await client.Uploader.upload(pollCheck.poll.canvas.toBuffer(), `Poll.png`))
            .setColor("#A52F05")]
    }).catch(() => {});

    client.reactions.set(userId, Date.now() + 3000);
    setTimeout(() => client.reactions.delete(userId), 3000);
}

/**
 * Handles giveaway reaction removal
 * @param {Object} client - The client instance
 * @param {Object} message - The message object
 * @param {Object} db - The giveaway database object
 * @param {string} userId - The user ID
 * @param {string} emojiId - The emoji ID
 * @returns {Promise<void>}
 */
async function handleGiveaway(client, message, db, userId, emojiId) {
    if (client.reactions.get(userId)) return;

    if (emojiId === client.config.emojis.confetti && !db.ended) {
        if (!db.users.find(u => u.userID === userId)) return;

        db.users = db.users.filter(object => object.userID !== userId);
        db.picking = db.picking.filter(object => object.userID !== userId);
        await db.save();

        client.reactions.set(userId, Date.now() + 3000);
        setTimeout(() => client.reactions.delete(userId), 3000);

        await client.users.get(userId)?.openDM()
            .then(dm => dm.sendMessage(
                `${client.translate.get(db.language, "Events.messageReactionRemove.left")} [${db.prize}](https://chat.f95.io/server/${db.serverId}/channel/${db.channelId}/${db.messageId})!\n` +
                `${client.translate.get(db.language, "Events.messageReactionRemove.left2")} **${db.users.length}** ${client.translate.get(db.language, "Events.messageReactionRemove.left")}!`
            ))
            .catch(() => {});
    }
}

/**
 * Handles role reaction removal
 * @param {Object} client - The client instance
 * @param {Object} message - The message object
 * @param {Object} db - The guild database object
 * @param {string} userId - The user ID
 * @param {string} emojiId - The emoji ID
 * @returns {Promise<void>}
 */
async function handleRoleReaction(client, message, db, userId, emojiId) {
    if (client.reactions.get(userId)) return;

    const roles = [];
    db.roles.find(e => e.msgId === message.id).roles.map(e => roles.push(e));
    const role = roles.find(e => e.emoji === emojiId);
    
    const member = await (client.servers.get(message.server.id) || await client.servers.fetch(message.server.id))?.fetchMember(userId);
    if (!member) return;

    let error = false;
    let dataRoles = [];
    if (member.roles) member.roles.map(e => dataRoles.push(e));
    if (!dataRoles.includes(role.role)) return;

    client.reactions.set(userId, Date.now() + 3000);
    setTimeout(() => client.reactions.delete(userId), 3000);

    dataRoles = dataRoles.filter(object => object !== role.role);
    await member.edit({ roles: dataRoles }).catch(() => { error = true });

    if (db.dm) {
        const dmMessage = error
            ? client.translate.get(db.language, "Events.messageReactionRemove.noPerms").replace("{role}", `**${role.name}**`)
            : client.translate.get(db.language, "Events.messageReactionRemove.success").replace("{role}", `**${role.name}**`);

        await member?.user?.openDM()
            .then(dm => dm.sendMessage(dmMessage))
            .catch(() => {});
    }
}

/**
 * Main event handler for message reaction removal
 * @param {Object} client - The client instance
 * @param {Object} message - The message object
 * @param {string} userId - The user ID
 * @param {string} emojiId - The emoji ID
 * @returns {Promise<void>}
 */
module.exports = async (client, message, userId, emojiId) => {
    try {
        const pollCheck = client.polls.get(message.id);
        const collector = client.messageCollector.get(userId);
        const editCollector = client.messageEdit.get(userId);

        // Handle message collector
        if (collector && collector.messageId === message.id && collector.channelId === message.channelId) {
            return await handleMessageCollector(client, message, emojiId, collector);
        }

        // Handle edit collector
        if (editCollector && editCollector.messageId === message.id && editCollector.channelId === message.channelId) {
            return await handleMessageCollector(client, message, emojiId, editCollector);
        }

        // Handle poll
        if (pollCheck) {
            return await handlePoll(client, message, pollCheck, userId, emojiId);
        }

        // Handle giveaway
        const giveaway = await Giveaways.findOne({ messageId: message.id });
        if (giveaway && !giveaway.ended) {
            return await handleGiveaway(client, message, giveaway, userId, emojiId);
        }

        // Handle role reaction
        const db = await client.database.getGuild(message.server.id, true);
        if (db?.roles.find(e => e.msgId === message.id)?.roles.find(e => e.emoji === emojiId)) {
            return await handleRoleReaction(client, message, db, userId, emojiId);
        }
    } catch (error) {
        console.error('Error in messageReactionRemove:', error);
    }
};