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

const { stripIndents } = require('common-tags');

class GrantCommand extends Command {

    constructor(client) {

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

    }

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

        // console.log(args.channel);

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

        const [ parse, ...perms ] = params;
        const resolveable = await this._parseResolveable(message, parse);
        if(!resolveable) return undefined;

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

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

        let parsed = [];
        if(perms.join(' ') === '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) failed.push(perm);
                if(search.type === 'module') {
                    for(const component of search.components.values()) {
                        if(component.type === 'command') parsed.push(component.resolveable);
                        //add check for grantable
                    }
                } else {
                    //add check for grantable
                    parsed.push(search.resolveable);
                }
            }
        }

        if(!_permissions[resolveable.id]) {
            _permissions[resolveable.id] = {
                global: [],
                channels: {}
            };
        }
        let existing = _permissions[resolveable.id];

        let pushed = [];
        let failed = [];
        if(args.channel) {
            for(const channel of args.channel.value) {
                const existingChannel = existing.channels[channel.id];
                if(existingChannel) {
                    for(const perm of parsed) {
                        if(existingChannel.includes(perm)) {
                            failed.push(perm);
                        } else {
                            existingChannel.push(perm);
                            pushed.push(perm);
                        }
                    }
                } else {
                    existing.channels[channel.id] = parsed;
                    pushed.concat(parsed)
                }
            }
        } else {
            for(const perm of parsed) {
                if(existing.global.includes(perm)) {
                    failed.push(perm);
                } else {
                    existing.global.push(perm);
                    pushed.push(perm);
                }
            }
        }

        delete _permissions._id; //some bullshit..

        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_GRANT_DATABASEERROR'), { emoji: 'failure' });
           return undefined;
        }

        if(pushed.length > 0) {
            return await message.respond(stripIndents`${message.format('C_GRANT_SUCCESS', { resolveable: resolveable.name || resolveable.user?.tag, permissions: pushed.map(p=>`\`${p}\``).join(', ') })}${args.channel ? ` ${message.format('C_GRANT_SUCCESSALT', { channels: args.channel.value.map(c=>`\`#${c.name}\``).join(', ')})}`: '.'}
                ${failed.length > 0 ? message.format('C_GRANT_SUCCESSFAILED', { resolveable: resolveable.user ? 'user' : 'role' }) : ''}`, { emoji: 'success' });
        } else {
            return await message.respond(message.format('C_GRANT_FAILED', { failed: failed.map(f=>`\`${f}\``).join(', '), resolveable: resolveable.user ? 'user' : 'role' }), { emoji: 'failure' })
        }


    }

    async _parseResolveable(message, resolveable) {
        let parsed = await this.client.resolver.resolveRoles(resolveable, message.guild);
        if(!parsed) {
            parsed = await this.client.resolver.resolveMembers(resolveable, message.guild);
            if(!parsed) {
                await message.respond(message.format('C_GRANT_RESOLVEERROR'), { emoji: 'failure' });
                return null;
            }
        }
        return parsed[0];
    }

}

module.exports = GrantCommand;

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))));
};