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

const { stripIndents } = require('common-tags');
const { Util } = require('../../../../../util/');

const pageSize = 10;

class HistoryCommand extends Command {

    constructor(client) {

        super(client, {
            name: 'history',
            module: 'moderation',
            usage: "[user..|channel..]",
            aliases: [
                'moderation'
            ],
            memberPermissions: ['MANAGE_MESSAGES'],
            guildOnly: true,
            arguments: [
                {
                    name: 'before', //Search for moderation actions before x
                    usage: '<date>',
                    type: 'DATE',
                    types: ['FLAG'],
                    required: true
                },
                {
                    name: 'after', //Search for moderation actions after x
                    usage: '<date>',
                    type: 'DATE',
                    types: ['FLAG'],
                    required: true
                },
                {
                    name: 'export', //Export moderation actions in a JSON.
                    type: 'BOOLEAN',
                    types: ['FLAG'],
                    default: true
                },
                {
                    name: 'private', //Send moderation history in DMs.
                    type: 'BOOLEAN',
                    types: ['FLAG'],
                    default: true
                } //filter, exclude, verbose (NO PAGESIZE)
            ],
            throttling: {
                usages: 2,
                duration: 5
            }
        });

        this.client = client;

    }

    async execute(message, { params, args }) {
        
        const query = {
            guild: message.guild.id
        };
        
        const { parsed, parameters } = await this.client.resolver.infinite(params, [
            this.client.resolver.resolveMember.bind(this.client.resolver),
            this.client.resolver.resolveUser.bind(this.client.resolver),
            this.client.resolver.resolveChannel.bind(this.client.resolver)
        ], true, message.guild, (c) => c.type === 'text');

        if(parsed.length > 0) query.target = { $in: parsed.map((p) => p.id) }; //Add resolved ids to the query.
        if(args.before || args.after) {
            query.timestamp = {};
            if(args.before) query.timestamp.$lt = args.before.value.valueOf(); //Add before timestamps to the query.
            if(args.after) query.timestamp.$gt = args.after.value.valueOf(); //Add after timestamps to the query.
        }

        let page = 1;
        if(parameters.length > 0) {
            const number = parseInt(parameters[0]);
            if(!Number.isNaN(number) && number > 1) {
                page = number;
            }
        }
        
        const collectionSize = await this.client.storageManager.mongodb.infractions.count(query);
        if(collectionSize === 0) {
            return message.respond(message.format('C_HISTORY_NORESULTS'), {
                emoji: 'failure'
            });
        }

        const maxPage = Math.ceil(collectionSize/pageSize);
        if(page > maxPage) page = maxPage;

        const infractions = await this.client.storageManager.mongodb.db.collection('infractions').find(query)
            .sort({ timestamp: -1 }).skip((page-1)*pageSize).limit(pageSize).toArray();

        const embed = {
            author: {
                name: 'Search Results',
                icon_url: message.guild.iconURL() //eslint-disable-line camelcase
            },
            fields: [],
            footer: {
                text: `Page ${page}/${maxPage} | ${collectionSize} Results`
            }
        };

        for(const infraction of infractions) {
            let target = null;
            if(infraction.targetType === 'user') {
                target = await this.client.resolver.resolveUser(infraction.target);
            } else {
                target = await this.client.resolver.resolveChannel(infraction.target, true, message.guild);
            }
            embed.fields.push({
                name: `**[${infraction.case}] ${infraction.type}** ${target ? `*${infraction.targetType === 'user' ? Util.escapeMarkdown(target.tag) : `#${target.name}`}*` : `Missing ${infraction.targetType}`}`,
                value: stripIndents`**Reason: ** \`${infraction.reason}\``
            });
        }

        message.embed(embed);

    }

}

module.exports = HistoryCommand;