const { User, GuildMember } = require('discord.js');
const { stripIndents } = require('common-tags')

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

class RevokeCommand extends Command {

    constructor(client) {

        super(client, {
            name: 'revoke',
            module: 'administration',
            usage: "<role|user> <permissions..>",
            examples: [
                "\"Server Moderators\" module:moderation",
                "@nolan#2887 command:kick",
                "132620781791346688 moderation"
            ],
            // memberPermissions: ['ADMINISTRATOR', 'MANAGE_GUILD'],
            showUsage: true,
            guildOnly: true,
            arguments: [
                {
                    name: 'channel',
                    aliases: [
                        'channels'
                    ],
                    type: 'CHANNEL',
                    types: ['FLAG', 'VERBAL'],
                    infinite: true
                }
            ]
        });

    }

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

        const _permissions = await message.guild.permissions();

        const [ parse, ...perms ] = params;
        const resolveable = await this._parseResolveable(message, parse);
        if((resolveable && !_permissions[resolveable.id] && !_permissions[parse])) {
            await message.respond(message.format('C_REVOKE_RESOLVEERROR', { id: resolveable.id }), { emoji: 'failure' });
            return undefined;
        }

        if(perms.length === 0) {
            await message.respond(message.format('C_REVOKE_MISSINGPERMPARAM'), { emoji: 'failure' });
            return undefined;
        }

        const permission = resolveable ? _permissions[resolveable.id] : _permissions[parse];

        const permissions = this.client.registry.components.filter(c=>
            c.type === 'command'
            || c.type === 'module'
        );

        let parsed = [];
        if(perms[0] === 'all') {
            parsed = this.client.registry.components.filter(c=>c.grantable && c.type === 'command').map(c=>c.resolveable);
        } else {
            for(const perm of perms) {
                const search = permissions.filter(filterInexact(perm)).first();
                if(search?.type === 'module') {
                    for(const component of search.components.values()) {
                        if(component.type === 'command') parsed.push(component.resolveable);
                        //add check for grantable
                    }
                } else if (search?.type === 'command'){
                    //add check for grantable
                    parsed.push(search.resolveable);
                } else {
                    if(args.channel) {
                        for(let channel of args.channel.value) {
                            if(permission.channels[channel.id].includes(perm)) parsed.push(perm); 
                        }
                    } else {
                        if(permission.global.includes(perm)) parsed.push(perm);
                    }
                }
            }
        }

        let removed = [];
        if(args.channel) {
            for(const channel of args.channel.value) {
                const existingChannel = permission.channels[channel.id];
                if(existingChannel) {
                    for(const parse of parsed) {
                        const index = existingChannel.indexOf(parse);
                        if(index > -1) {
                            removed.push(parse);
                            permission.channels[channel.id].splice(index, 1);
                        }
                    }
                    if(existingChannel.length === 0) delete permission.channels[channel.id];
                } else {
                    continue;
                }
            }
        } else {
            for(const parse of parsed) {
                console.log(permission);
                const index = permission.global.indexOf(parse);
                if(index > -1) {
                    removed.push(parse);
                    permission.global.splice(index, 1);
                }
            }
        }

        delete _permissions._id; //some bullshit..

        //check for deletion, saves DB space.
        //NOTE: DO NOT REMOVE THE _PERMISSIONS VARIABLE.
        if(permission.global.length === 0 && Object.keys(permission.channels).length === 0) {
            console.log("DELETING FOR SOME REASON WHY")
            try {
                await this.client.transactionHandler.send({
                    provider: 'mongodb',
                    request: {
                        type: 'remove',
                        collection: 'permissions',
                        query: {
                            guildId: message.guild.id
                        }
                    }
                });
            } catch(error) {
                this.client.logger.warn(`Attempted to delete collection permissions:${message.guild.id} but failed.`);
            }
        } else {
            try {
                await this.client.transactionHandler.send({
                    provider: 'mongodb',
                    request: {
                        type: 'updateOne',
                        collection: 'permissions',
                        query: {
                            guildId: message.guild.id
                        },
                        data: _permissions
                    }
                }); 
            } catch(error) {
                await message.respond(message.format('C_REVOKE_DATABASEERROR'), { emoji: 'failure' });
                return undefined;
            }
        }

        const name = resolveable instanceof GuildMember 
            ? resolveable?.user?.tag 
            : resolveable instanceof User
                ? resolveable?.tag
                : resolveable?.name;

        if(removed.length > 0) {
            await message.respond(stripIndents`${message.format('C_REVOKE_SUCCESS', { removed: removed.map(r=>`\`${r}\``).join(', '), resolveable: name || parsed })}${args.channel ? ` ${message.format('C_REVOKE_SUCCESSALT', { channels: args.channel.value.map(c=>`\`#${c.name}\``).join(', ')})}` : '.'}
                ${removed.length < parsed.length ? message.format('C_REVOKE_SUCCESSFAILED'): ''}`, { emoji: 'success' });
        } else {
            await message.respond(message.format('C_REVOKE_FAILED', { resolveable: name || parsed }), { emoji: 'failure' });
        }
        
    }

    async _parseResolveable(message, resolveable) {
        let parsed = await this.client.resolver.resolveRole(resolveable, true, message.guild);
        if(!parsed) {
            parsed = await this.client.resolver.resolveUser(resolveable, true, message.guild);
        }
        return parsed || null;
    }

}

module.exports = RevokeCommand;

const filterInexact = (search) => {
    return comp => comp.id.toLowerCase().includes(search) ||
        comp.resolveable.toLowerCase().includes(search) ||
        (comp.aliases && (comp.aliases.some(ali => `${comp.type}:${ali}`.toLowerCase().includes(search)) ||
        comp.aliases.some(ali => ali.toLowerCase().includes(search))));
};