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

const safeCommands = ['command:settings', 'command:grant', 'command:revoke'];

class Permissions extends Inhibitor {

    constructor(client) {

        super(client, {
            name: 'permissions',
            priority: 10,
            guarded: true,
            guild: true
        });

    }

    async execute(message, command) {
        const { permissionType } = message.guild._settings;

        let missing = [];
        if(permissionType === 'discord') {
            missing = this._checkDiscord(message, command.memberPermissions);
        } else if(permissionType === 'grant') {
            // vv Prevent Softlock vv
            if(safeCommands.includes(command.resolveable) && (this._checkDiscord(message, ['ADMINISTRATOR']).length === 0 || this._checkDiscord(message, ['MANAGE_GUILD']).length === 0)) {
                return super._succeed();
            }
            missing = await this._checkGrants(message, command.resolveable);
        } else {
            missing = this._checkDiscord(message, command.memberPermissions);
            missing.concat(await this._checkGrants(message, command.resolveable));
        }

        if(missing.length > 0) {
            return super._fail({ missing: missing.join(', ') });
        }
        return super._succeed();

    }

    _checkDiscord(message, permissions) {
        return message.channel.permissionsFor(message.member).missing(permissions);
    }

    async _checkGrants(message, permission) { //async just incase
        const _permissions = await message.guild.permissions();
        const roles = message.member.roles.cache.map((r) => r.id);
        const { channelId } = message.channel;
        const { userId } = message.member;

        let allowed = false;
        for(const [ id, permissions ] of Object.entries(_permissions)) {
            if(id === userId || roles.includes(id)) {
                if(permissions.global.includes(permission)) {
                    allowed = true; break; 
                }
                const channel = permissions.channels[channelId];
                if(!channel) continue;
                if(channel.includes(permission)) allowed = true; break;
            }
            continue;
        }
        return allowed ? [] : [permission];
    }

}

module.exports = Permissions;