/* jslint node: true */
/* eslint-disable no-console */
'use strict';

const printUsageAndSetExitCode	= require('./oputil_common.js').printUsageAndSetExitCode;
const ExitCodes					= require('./oputil_common.js').ExitCodes;
const argv						= require('./oputil_common.js').argv;
const initConfigAndDatabases	= require('./oputil_common.js').initConfigAndDatabases;
const getHelpFor				= require('./oputil_help.js').getHelpFor;
const Errors					= require('../enig_error.js').Errors;

const async						= require('async');
const _							= require('lodash');

exports.handleUserCommand		= handleUserCommand;

function getUser(userName, cb) {
    const User = require('../../core/user.js');
    User.getUserIdAndName(userName, (err, userId) => {
        if(err) {
            process.exitCode = ExitCodes.BAD_ARGS;
            return cb(err);
        }
        const u = new User();
        u.userId = userId;
        return cb(null, u);
    });
}

function initAndGetUser(userName, cb) {
    async.waterfall(
        [
            function init(callback) {
                initConfigAndDatabases(callback);
            },
            function getUserObject(callback) {
                getUser(userName, (err, user) => {
                    if(err) {
                        process.exitCode = ExitCodes.BAD_ARGS;
                        return callback(err);
                    }
                    return callback(null, user);
                });
            }
        ],
        (err, user) => {
            return cb(err, user);
        }
    );
}

function setAccountStatus(user, status) {
    if(argv._.length < 3) {
        return printUsageAndSetExitCode(getHelpFor('User'), ExitCodes.ERROR);
    }

    const AccountStatus = require('../../core/user.js').AccountStatus;
    const statusDesc = _.invert(AccountStatus)[status];
    user.persistProperty('account_status', status, err => {
        if(err) {
            process.exitCode = ExitCodes.ERROR;
            console.error(err.message);
        } else {
            console.info(`User status set to ${statusDesc}`);
        }
    });
}

function setUserPassword(user) {
    if(argv._.length < 4) {
        return printUsageAndSetExitCode(getHelpFor('User'), ExitCodes.ERROR);
    }

    async.waterfall(
        [
            function validate(callback) {
                //	:TODO: prompt if no password provided (more secure, no history, etc.)
                const password = argv._[argv._.length - 1];
                if(0 === password.length) {
                    return callback(Errors.Invalid('Invalid password'));
                }
                return callback(null, password);
            },
            function set(password, callback) {
                user.setNewAuthCredentials(password, err => {
                    if(err) {
                        process.exitCode = ExitCodes.BAD_ARGS;
                    }
                    return callback(err);
                });
            }
        ],
        err => {
            if(err) {
                console.error(err.message);
            } else {
                console.info('New password set');
            }
        }
    );
}

function removeUser() {
    console.error('NOT YET IMPLEMENTED');
}

function modUserGroups(user) {
    if(argv._.length < 3) {
        return printUsageAndSetExitCode(getHelpFor('User'), ExitCodes.ERROR);
    }

    let groupName = argv._[argv._.length - 1].toString().replace(/["']/g, '');	//	remove any quotes - necessary to allow "-foo"
    let action = groupName[0];	//	+ or -

    if('-' === action || '+' === action) {
        groupName = groupName.substr(1);
    }

    action = action || '+';

    if(0 === groupName.length) {
        return printUsageAndSetExitCode(getHelpFor('User'), ExitCodes.ERROR);
    }

    //
    //	Groups are currently arbritary, so do a slight validation
    //
    if(!/[A-Za-z0-9]+/.test(groupName)) {
        process.exitCode = ExitCodes.BAD_ARGS;
        return console.error('Bad group name');
    }

    function done(err) {
        if(err) {
            process.exitCode = ExitCodes.BAD_ARGS;
            console.error(err.message);
        } else {
            console.info('User groups modified');
        }
    }

    const UserGroup = require('../../core/user_group.js');
    if('-' === action) {
        UserGroup.removeUserFromGroup(user.userId, groupName, done);
    } else {
        UserGroup.addUserToGroup(user.userId, groupName, done);
    }
}

function activateUser(user) {
    const AccountStatus = require('../../core/user.js').AccountStatus;
    return setAccountStatus(user, AccountStatus.active);
}

function deactivateUser(user) {
    const AccountStatus = require('../../core/user.js').AccountStatus;
    return setAccountStatus(user, AccountStatus.inactive);
}

function disableUser(user) {
    const AccountStatus = require('../../core/user.js').AccountStatus;
    return setAccountStatus(user, AccountStatus.disabled);
}

function handleUserCommand() {
    function errUsage()  {
        return printUsageAndSetExitCode(getHelpFor('User'), ExitCodes.ERROR);
    }

    if(true === argv.help) {
        return errUsage();
    }

    const action		= argv._[1];
    const usernameIdx	= [ 'pass', 'passwd', 'password', 'group' ].includes(action) ? argv._.length - 2 : argv._.length - 1;
    const userName		= argv._[usernameIdx];

    if(!userName) {
        return errUsage();
    }

    initAndGetUser(userName, (err, user) => {
        if(err) {
            process.exitCode = ExitCodes.ERROR;
            return console.error(err.message);
        }

        return ({
            pass		: setUserPassword,
            passwd		: setUserPassword,
            password	: setUserPassword,

            rm			: removeUser,
            remove		: removeUser,
            del			: removeUser,
            delete		: removeUser,

            activate	: activateUser,
            deactivate	: deactivateUser,
            disable		: disableUser,

            group		: modUserGroups,
        }[action] || errUsage)(user);
    });
}