const { Command } = require('../../../../interfaces/');
const { Ban } = require('../../../../moderation/infractions/');

const { MessageAttachment } = require('discord.js');

class MassBanCommand extends Command {

    constructor(client) {

        super(client, {
            name: 'massban',
            module: 'administration',
            usage: "<arguments..> [reason..]",
            clientPermissions: ['BAN_MEMBERS'],
            memberPermissions: ['MANAGE_GUILD', 'ADMINISTRATOR'],
            aliases: [],
            examples: [
                "--accountage 1d raiding the server"
            ],
            restricted: true,
            archivable: false,
            arguments: [
                {
                    name: 'exact',
                    usage: '<text>',
                    type: 'STRING',
                    types: ['FLAG'],
                    required: true
                },
                {
                    name: 'contains',
                    aliases: ['includes'],
                    usage: '<text>',
                    type: 'STRING',
                    types: ['FLAG'],
                    required: true
                },
                {
                    name: 'startswith',
                    aliases: [
                        'starts',
                        'begins',
                        'beginswith'
                    ],
                    usage: '<text>',
                    type: 'STRING',
                    types: ['FLAG'],
                    required: true
                },
                {
                    name: 'endswith',
                    aliases: ['ends'],
                    usage: '<text>',
                    type: 'STRING',
                    types: ['FLAG'],
                    required: true
                },
                {
                    name: 'accountage',
                    aliases: ['accage'],
                    type: 'TIME',
                    usage: '<time>',
                    types: ['FLAG'],
                    required: true
                },
                {
                    name: 'guildage',
                    aliases: ['serverage'],
                    type: 'TIME',
                    usage: '<time>',
                    types: ['FLAG'],
                    required: true
                },
                {
                    name: 'ignorecase',
                    type: 'BOOLEAN',
                    types: ['FLAG'],
                    default: true
                },
                {
                    name: 'or',
                    type: 'BOOLEAN',
                    types: ['FLAG'],
                    default: true
                },
                {
                    name: 'silent',
                    type: 'BOOLEAN',
                    types: ['FLAG'],
                    default: true
                }
            ],
            guildOnly: true,
            showUsage: true,
            throttling: {
                usages: 2,
                duration: 60
            }
        });

        this.client = client;

    }

    async execute(message, { qParams, args }) {

        // const requiredArguments = ['exact', 'contains', 'startswith', 'endswith', 'accountage', 'guildage'];
        // if(!Object.keys(args).some((a) => requiredArguments.includes(a))) {
        //     return message.respond(message.format('C_MASSBAN_REQUIREDARGUMENTS'), {
        //         emoji: 'failure'
        //     });
        // }

        const members = await message.guild.members.fetch();
        const filteredMembers = this._filterMembers(members, args);
        
        if(filteredMembers.size === 0) return message.respond(message.format('C_MASSBAN_NORESULTS'), { emoji: 'failure' });

        const text = filteredMembers.map((m) => `${m.user.tag} (${m.user.id})`).join('\n');

        const prompt = await message.prompt(message.format('C_MASSBAN_VERIFICATION', { amount: filteredMembers.size }), {
            emoji: 'warning',
            files: [
                new MessageAttachment(Buffer.from(text, 'utf-8'), 'members.txt')
            ]
        });
        
        if(!prompt) return undefined;
        const boolean = this.client.resolver.resolveBoolean(prompt.content.toLowerCase());
        if(boolean === null) return message.respond(message.format('C_MASSBAN_INVALIDABORT'), { emojis: 'failure' });
        if(boolean === false) return message.respond(message.format('C_MASSBAN_ABORT'), { emojis: 'success' });
    
        for(const member of filteredMembers.values()) {
            const fetch = await message.guild.members.fetch(member.id);
            if(!fetch) continue;

            try {
                await this.client.moderationManager._handleTarget(Ban, fetch, {
                    guild: message.guild,
                    channel: message.channel,
                    executor: message.member,
                    reason: qParams.join(' ')
                });
            } catch(e) {
                console.error(e);
            }
        }

        return message.respond(message.format('C_MASSBAN_SUCCESS'), { emojis: 'success' });

    }

    _filterMembers(members, a) {
        const filters = {
            AND: (m) => {
                return (a.exact ? a.ignorecase ? a.exact.value.toLowerCase() === m.user.username.toLowerCase() : a.exact.value === m.user.username : true) //eslint-disable-line no-nested-ternary
                    && (a.contains ? a.ignorecase ? m.user.username.toLowerCase().includes(a.contains.value.toLowerCase()) : m.user.username.includes(a.contains.value) : true) //eslint-disable-line no-nested-ternary
                    && (a.startswith ? a.ignorecase ? m.user.username.toLowerCase().startsWith(a.startswith.value.toLowerCase()) : m.user.username.startsWith(a.startswith.value) : true) //eslint-disable-line no-nested-ternary
                    && (a.endswith ? a.ignorecase ? m.user.username.toLowerCase().endsWith(a.endswith.value.toLowerCase()) : m.user.username.endsWith(a.endswith.value) : true) //eslint-disable-line no-nested-ternary
                    && (a.accountage ? Math.floor((Date.now() - m.user.createdTimestamp)/1000) < a.accountage.value : true)
                    && (a.guildage ? Math.floor((Date.now() - m.joinedTimestamp)/1000) < a.guildage.value : true);
            },
            OR: (m) => {
                return (a.exact ? a.ignorecase ? a.exact.value.toLowerCase() === m.user.username.toLowerCase() : a.exact.value === m.user.username : false) //eslint-disable-line no-nested-ternary
                    || (a.contains ? a.ignorecase ? m.user.username.toLowerCase().includes(a.contains.value.toLowerCase()) : m.user.username.includes(a.contains.value) : false) //eslint-disable-line no-nested-ternary
                    || (a.startswith ? a.ignorecase ? m.user.username.toLowerCase().startsWith(a.startsWith.value.toLowerCase()) : m.user.username.startsWith(a.startswith.value) : false) //eslint-disable-line no-nested-ternary
                    || (a.endswith ? a.ignorecase ? m.user.username.toLowerCase().endsWith(a.endswith.value.toLowerCase()) : m.user.username.endsWith(a.endswith.value) : false) //eslint-disable-line no-nested-ternary
                    || (a.accountage ? Math.floor((Date.now() - m.user.createdTimestamp)/1000) < a.accountage.value : false)
                    || (a.guildage ? Math.floor((Date.now() - m.joinedTimestamp)/1000) < a.guildage.value : false);
            }
        };

        const method = a.or ? 'OR' : 'AND';
        return members.filter((m) => {
            return filters[method](m);
        });

    }

    _alertExecutor(message, successes, fails) {
        return message.respond(message.format('C_MASSBAN_COMPLETED', { success: successes, max: successes+fails }), { 
            reply: true,
            emoji: 'success'
        });
    }

}

module.exports = MassBanCommand;