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

const config			= require('../../core/config.js');
const db				= require('../../core/database.js');

const _					= require('lodash');
const async				= require('async');
const inq			    = require('inquirer');
const fs                = require('fs');
const hjson             = require('hjson');

const packageJson       = require('../../package.json');

exports.printUsageAndSetExitCode		= printUsageAndSetExitCode;
exports.getDefaultConfigPath			= getDefaultConfigPath;
exports.getConfigPath					= getConfigPath;
exports.initConfigAndDatabases			= initConfigAndDatabases;
exports.getAreaAndStorage				= getAreaAndStorage;
exports.looksLikePattern				= looksLikePattern;
exports.getAnswers                      = getAnswers;
exports.writeConfig                     = writeConfig;

const HJSONStringifyCommonOpts = exports.HJSONStringifyCommonOpts = {
    emitRootBraces  : true,
    bracesSameLine  : true,
    space           : 4,
    keepWsc         : true,
    quotes          : 'min',
    eol             : '\n',
};

const exitCodes = exports.ExitCodes = {
    SUCCESS		: 0,
    ERROR		: -1,
    BAD_COMMAND	: -2,
    BAD_ARGS	: -3,
};

const argv = exports.argv = require('minimist')(process.argv.slice(2), {
    alias : {
        h	 	: 'help',
        v		: 'version',
        c		: 'config',
        n		: 'no-prompt',
    }
});

function printUsageAndSetExitCode(errMsg, exitCode) {
    if(_.isUndefined(exitCode)) {
        exitCode = exitCodes.ERROR;
    }

    process.exitCode = exitCode;

    if(errMsg) {
        console.error(errMsg);
    }
}

function getDefaultConfigPath() {
    return './config/';
}

function getConfigPath() {
    const baseConfigPath = argv.config ? argv.config : config.getDefaultPath();
    return baseConfigPath + 'config.hjson';
}

function initConfig(cb) {
    const configPath = getConfigPath();

    config.init(configPath, { keepWsc : true, noWatch : true }, cb);
}

function initConfigAndDatabases(cb) {
    async.series(
        [
            function init(callback) {
                initConfig(callback);
            },
            function initDb(callback) {
                db.initializeDatabases(callback);
            },
            function initArchiveUtil(callback) {
                //  ensure we init ArchiveUtil without events
                require('../../core/archive_util').getInstance(true);  //  true=noWatch
                return callback(null);
            }
        ],
        err => {
            return cb(err);
        }
    );
}

function getAreaAndStorage(tags) {
    return tags.map(tag => {
        const parts = tag.toString().split('@');
        const entry = {
            areaTag	: parts[0],
        };
        entry.pattern = entry.areaTag;	//	handy
        if(parts[1]) {
            entry.storageTag = parts[1];
        }
        return entry;
    });
}

function looksLikePattern(tag) {
    //	globs can start with @
    if(tag.indexOf('@') > 0) {
        return false;
    }

    return /[*?[\]!()+|^]/.test(tag);
}

function getAnswers(questions, cb) {
    inq.prompt(questions).then( answers => {
        return cb(answers);
    });
}

function writeConfig(config, path) {
    config = hjson.stringify(config, HJSONStringifyCommonOpts)
        .replace(/%ENIG_VERSION%/g,     packageJson.version)
        .replace(/%HJSON_VERSION%/g,    hjson.version);

    try {
        fs.writeFileSync(path, config, 'utf8');
        return true;
    } catch(e) {
        return false;
    }
}