/*******************************
            Set-up
*******************************/

const
    fs             = require('fs'),
    path           = require('path'),
    requireDotFile = require('require-dot-file'),
    defaults       = require('../defaults'),
    release        = require('./release')
;

/*******************************
          When to Ask
*******************************/

/* Preconditions for install questions */

let when = {

    // path
    changeRoot: function (questions) {
        return questions.useRoot !== undefined && questions.useRoot !== true;
    },

    // permissions
    changePermissions: function (questions) {
        return questions.changePermissions === true;
    },

    // install
    hasConfig: function () {
        return requireDotFile('semantic.json', process.cwd());
    },

    allowOverwrite: function (questions) {
        return questions.overwrite === undefined || questions.overwrite === 'yes';
    },
    notAuto: function (questions) {
        return questions.install !== 'auto' && (questions.overwrite === undefined || questions.overwrite === 'yes');
    },
    custom: function (questions) {
        return questions.install === 'custom' && (questions.overwrite === undefined || questions.overwrite === 'yes');
    },
    express: function (questions) {
        return questions.install === 'express' && (questions.overwrite === undefined || questions.overwrite === 'yes');
    },

    // customize
    customize: function (questions) {
        return questions.customize === true;
    },
    primaryColor: function (questions) {
        return questions.primaryColor;
    },
    secondaryColor: function (questions) {
        return questions.secondaryColor;
    },
};

/*******************************
        Response Filters
*******************************/

/* Filters to user input from install questions */

let filter = {
    removeTrailingSlash: function (path) {
        return path.replace(/(\/$|\\$)+/gm, '');
    },
};

/*******************************
          Configuration
*******************************/

module.exports = {

    // check whether install is setup
    isSetup: function () {
        return when.hasConfig();
    },

    // detect whether there is a semantic.json configuration and that the auto-install option is set to true
    shouldAutoInstall: function () {
        let
            config = when.hasConfig()
        ;

        return config.autoInstall;
    },

    // checks if files are in a PM directory
    getPackageManager: function (directory) {
        let
            // returns last matching result (avoid sub-module detection)
            walk = function (directory) {
                let
                    pathArray     = directory.split(path.sep),
                    folder        = pathArray[pathArray.length - 1],
                    nextDirectory = path.join(directory, path.sep, '..')
                ;
                if (folder === 'bower_components') {
                    return {
                        name: 'Bower',
                        root: nextDirectory,
                    };
                }
                if (folder === 'node_modules') {
                    return {
                        name: 'NPM',
                        root: nextDirectory,
                    };
                }
                if (folder === 'composer') {
                    return {
                        name: 'Composer',
                        root: nextDirectory,
                    };
                }
                if (path.resolve(directory) === path.resolve(nextDirectory)) {
                    return false;
                }

                // recurse downward
                return walk(nextDirectory);
            }
        ;
        // start walk from current directory if none specified
        directory = directory || path.join(__dirname, path.sep);

        return walk(directory);
    },

    // checks if files is PMed submodule
    isSubModule: function (directory) {
        let
            moduleFolders = 0,
            walk = function (directory) {
                let
                    pathArray     = directory.split(path.sep),
                    folder        = pathArray[pathArray.length - 2],
                    nextDirectory = path.join(directory, path.sep, '..')
                ;
                if (['bower_components', 'node_modules', 'composer'].includes(folder)) {
                    moduleFolders++;
                } else if (folder === '.pnpm') {
                    moduleFolders--;
                }
                if (path.resolve(directory) === path.resolve(nextDirectory)) {
                    return moduleFolders > 1;
                }

                // recurse downward
                return walk(nextDirectory);
            }
        ;
        // start walk from current directory if none specified
        directory = directory || path.join(__dirname, path.sep);

        return walk(directory);
    },

    createJSON: function (answers) {
        let
            json = {
                paths: {
                    source: {},
                    output: {},
                },
            }
        ;

        // add components
        if (answers.components) {
            json.components = answers.components;
        }

        // add rtl choice
        if (answers.rtl) {
            json.rtl = answers.rtl;
        }

        // add permissions
        if (answers.permission) {
            json.permission = answers.permission;
        }

        // add path to semantic
        if (answers.semanticRoot) {
            json.base = path.normalize(answers.semanticRoot);
        }

        // record version number to avoid re-installing on same version
        json.version = release.version;

        // add dist folder paths
        if (answers.dist) {
            answers.dist = path.normalize(answers.dist);

            json.paths.output = {
                packaged: path.normalize(answers.dist + '/'),
                uncompressed: path.normalize(answers.dist + '/components/'),
                compressed: path.normalize(answers.dist + '/components/'),
                themes: path.normalize(answers.dist + '/themes/'),
            };
        }

        // add site path
        if (answers.site) {
            json.paths.source.site = path.normalize(answers.site + '/');
        }
        if (answers.packaged) {
            json.paths.output.packaged = path.normalize(answers.packaged + '/');
        }
        if (answers.compressed) {
            json.paths.output.compressed = path.normalize(answers.compressed + '/');
        }
        if (answers.uncompressed) {
            json.paths.output.uncompressed = path.normalize(answers.uncompressed + '/');
        }

        return json;
    },

    // files cleaned up after install
    setupFiles: [
        './src/theme.config.example',
        './semantic.json.example',
        './src/_site',
    ],

    regExp: {
        // used to match siteFolder variable in theme.less
        siteVariable: /@siteFolder .*'(.*)/gm,
    },

    // source paths (when installing)
    source: {
        config: './semantic.json.example',
        definitions: './src/definitions',
        gulpFile: './gulpfile.js',
        overridesImport: './src/overrides.less',
        lessImport: './src/semantic.less',
        site: './src/_site',
        tasks: './tasks',
        themeConfig: './src/theme.config.example',
        themeImport: './src/theme.less',
        themes: './src/themes',
        defaultTheme: './src/themes/default',
        userGulpFile: './tasks/config/npm/gulpfile.js',
    },

    // expected final filenames
    files: {
        config: 'semantic.json',
        overridesImport: 'src/overrides.less',
        lessImport: 'src/semantic.less',
        site: 'src/site',
        themeConfig: 'src/theme.config',
        themeImport: 'src/theme.less',
    },

    // folder paths to files relative to root
    folders: {
        config: './',
        definitions: 'src/definitions/',
        overridesImport: 'src/',
        lessImport: 'src/',
        modules: 'node_modules/',
        site: 'src/site/',
        tasks: 'tasks/',
        themeConfig: 'src/',
        themeImport: 'src/',
        themes: 'src/themes/',

        defaultTheme: 'default/', // only path that is relative to another directory and not root
    },

    // questions asked during install
    questions: {

        root: [
            {
                type: 'list',
                name: 'useRoot',
                message:
          '{packageMessage} Is this your project folder? {root}',
                choices: [
                    {
                        name: 'Yes',
                        value: true,
                    },
                    {
                        name: 'No, let me specify',
                        value: false,
                    },
                ],
            },
            {
                type: 'input',
                name: 'customRoot',
                message: 'Please enter the absolute path to your project root',
                default: '/my/project/path',
                when: when.changeRoot,
            },
            {
                type: 'input',
                name: 'semanticRoot',
                message: 'Where should we put Fomantic UI inside your project?',
                default: 'semantic/',
            },
        ],

        setup: [
            {
                type: 'list',
                name: 'overwrite',
                message: 'It looks like you have a semantic.json file already.',
                when: when.hasConfig,
                choices: [
                    {
                        name: 'Yes, extend my current settings.',
                        value: 'yes',
                    },
                    {
                        name: 'Skip install',
                        value: 'no',
                    },
                ],
            },
            {
                type: 'list',
                name: 'install',
                message: 'Set-up Fomantic UI',
                when: when.allowOverwrite,
                choices: [
                    {
                        name: 'Automatic (Use default locations and all components)',
                        value: 'auto',
                    },
                    {
                        name: 'Express (Set components and output folder)',
                        value: 'express',
                    },
                    {
                        name: 'Custom (Customize all src/dist values)',
                        value: 'custom',
                    },
                ],
            },
            {
                type: 'checkbox',
                name: 'components',
                message: 'What components should we include in the package?',

                // duplicated manually from tasks/defaults.js with additional property
                choices: [
                    { name: '\u001B[4mGlobal\u001B[0m', disabled: 'Styles that are applied across a site' },
                    { name: 'reset', checked: true },
                    { name: 'site', checked: true },
                    { name: '\u001B[4mElements\u001B[0m', disabled: 'Page elements with a single function' },
                    { name: 'button', checked: true },
                    { name: 'container', checked: true },
                    { name: 'divider', checked: true },
                    { name: 'emoji', checked: true },
                    { name: 'flag', checked: true },
                    { name: 'header', checked: true },
                    { name: 'icon', checked: true },
                    { name: 'image', checked: true },
                    { name: 'input', checked: true },
                    { name: 'label', checked: true },
                    { name: 'list', checked: true },
                    { name: 'loader', checked: true },
                    { name: 'rail', checked: true },
                    { name: 'reveal', checked: true },
                    { name: 'segment', checked: true },
                    { name: 'step', checked: true },
                    { name: '\u001B[4mCollections\u001B[0m', disabled: 'Heterogeneous groups of components' },
                    { name: 'breadcrumb', checked: true },
                    { name: 'form', checked: true },
                    { name: 'grid', checked: true },
                    { name: 'menu', checked: true },
                    { name: 'message', checked: true },
                    { name: 'table', checked: true },
                    { name: '\u001B[4mViews\u001B[0m', disabled: 'Convention for presenting specific types of content' },
                    { name: 'ad', checked: true },
                    { name: 'card', checked: true },
                    { name: 'comment', checked: true },
                    { name: 'feed', checked: true },
                    { name: 'item', checked: true },
                    { name: 'statistic', checked: true },
                    { name: '\u001B[4mModules\u001B[0m', disabled: 'Components which need Javascript for interactivity' },
                    { name: 'accordion', checked: true },
                    { name: 'calendar', checked: true },
                    { name: 'checkbox', checked: true },
                    { name: 'dimmer', checked: true },
                    { name: 'dropdown', checked: true },
                    { name: 'embed', checked: true },
                    { name: 'flyout', checked: true },
                    { name: 'modal', checked: true },
                    { name: 'nag', checked: true },
                    { name: 'placeholder', checked: true },
                    { name: 'popup', checked: true },
                    { name: 'progress', checked: true },
                    { name: 'slider', checked: true },
                    { name: 'rating', checked: true },
                    { name: 'search', checked: true },
                    { name: 'shape', checked: true },
                    { name: 'sidebar', checked: true },
                    { name: 'sticky', checked: true },
                    { name: 'tab', checked: true },
                    { name: 'text', checked: true },
                    { name: 'toast', checked: true },
                    { name: 'transition', checked: true },
                    { name: '\u001B[4mBehaviors\u001B[0m', disabled: 'Standalone javascript components' },
                    { name: 'api', checked: true },
                    { name: 'form', checked: true },
                    { name: 'state', checked: true },
                    { name: 'visibility', checked: true },
                ],
                when: when.notAuto,
            },
            {
                type: 'list',
                name: 'changePermissions',
                when: when.notAuto,
                message: 'Should we set permissions on outputted files?',
                choices: [
                    {
                        name: 'No',
                        value: false,
                    },
                    {
                        name: 'Yes',
                        value: true,
                    },
                ],
            },
            {
                type: 'input',
                name: 'permission',
                message: 'What octal file permission should outputted files receive?',
                default: defaults.permission,
                when: when.changePermissions,
            },
            {
                type: 'list',
                name: 'rtl',
                message: 'Do you use a RTL (Right-To-Left) language?',
                when: when.notAuto,
                choices: [
                    {
                        name: 'No',
                        value: false,
                    },
                    {
                        name: 'Yes',
                        value: true,
                    },
                    {
                        name: 'Build Both',
                        value: 'both',
                    },
                ],
            },
            {
                type: 'input',
                name: 'dist',
                message: 'Where should we output Fomantic UI?',
                default: defaults.paths.output.packaged,
                filter: filter.removeTrailingSlash,
                when: when.express,
            },
            {
                type: 'input',
                name: 'site',
                message: 'Where should we put your site folder?',
                default: defaults.paths.source.site,
                filter: filter.removeTrailingSlash,
                when: when.custom,
            },
            {
                type: 'input',
                name: 'packaged',
                message: 'Where should we output a packaged version?',
                default: defaults.paths.output.packaged,
                filter: filter.removeTrailingSlash,
                when: when.custom,
            },
            {
                type: 'input',
                name: 'compressed',
                message: 'Where should we output compressed components?',
                default: defaults.paths.output.compressed,
                filter: filter.removeTrailingSlash,
                when: when.custom,
            },
            {
                type: 'input',
                name: 'uncompressed',
                message: 'Where should we output uncompressed components?',
                default: defaults.paths.output.uncompressed,
                filter: filter.removeTrailingSlash,
                when: when.custom,
            },
        ],

        cleanup: [
            {
                type: 'list',
                name: 'cleanup',
                message: 'Should we remove set-up files?',
                choices: [
                    {
                        name: 'Yes (re-install will require redownloading fomantic).',
                        value: 'yes',
                    },
                    {
                        name: 'No Thanks',
                        value: 'no',
                    },
                ],
            },
            {
                type: 'list',
                name: 'build',
                message: 'Do you want to build Fomantic now?',
                choices: [
                    {
                        name: 'Yes',
                        value: 'yes',
                    },
                    {
                        name: 'No',
                        value: 'no',
                    },
                ],
            },
        ],
        site: [
            {
                type: 'list',
                name: 'customize',
                message: 'You have not yet customized your site, can we help you do that?',
                choices: [
                    {
                        name: 'Yes, ask me a few questions',
                        value: true,
                    },
                    {
                        name: 'No I\'ll do it myself',
                        value: false,
                    },
                ],
            },
            {
                type: 'list',
                name: 'headerFont',
                message: 'Select your header font',
                choices: [
                    {
                        name: 'Helvetica Neue, Arial, sans-serif',
                        value: 'Helvetica Neue, Arial, sans-serif;',
                    },
                    {
                        name: 'Lato (Google Fonts)',
                        value: 'Lato',
                    },
                    {
                        name: 'Open Sans (Google Fonts)',
                        value: 'Open Sans',
                    },
                    {
                        name: 'Source Sans Pro (Google Fonts)',
                        value: 'Source Sans Pro',
                    },
                    {
                        name: 'Droid (Google Fonts)',
                        value: 'Droid',
                    },
                    {
                        name: 'I\'ll choose on my own',
                        value: false,
                    },
                ],
                when: when.customize,
            },
            {
                type: 'list',
                name: 'pageFont',
                message: 'Select your page font',
                choices: [
                    {
                        name: 'Helvetica Neue, Arial, sans-serif',
                        value: 'Helvetica Neue, Arial, sans-serif;',
                    },
                    {
                        name: 'Lato (Import from Google Fonts)',
                        value: 'Lato',
                    },
                    {
                        name: 'Open Sans (Import from Google Fonts)',
                        value: 'Open Sans',
                    },
                    {
                        name: 'Source Sans Pro (Import from Google Fonts)',
                        value: 'Source Sans Pro',
                    },
                    {
                        name: 'Droid (Google Fonts)',
                        value: 'Droid',
                    },
                    {
                        name: 'I\'ll choose on my own',
                        value: false,
                    },
                ],
                when: when.customize,
            },
            {
                type: 'list',
                name: 'fontSize',
                message: 'Select your base font size',
                default: '14px',
                choices: [
                    {
                        name: '12px',
                    },
                    {
                        name: '13px',
                    },
                    {
                        name: '14px (Recommended)',
                        value: '14px',
                    },
                    {
                        name: '15px',
                    },
                    {
                        name: '16px',
                    },
                    {
                        name: 'I\'ll choose on my own',
                        value: false,
                    },
                ],
                when: when.customize,
            },
            {
                type: 'list',
                name: 'primaryColor',
                message: 'Select the closest name for your primary brand color',
                default: '14px',
                choices: [
                    {
                        name: 'Blue',
                    },
                    {
                        name: 'Green',
                    },
                    {
                        name: 'Orange',
                    },
                    {
                        name: 'Pink',
                    },
                    {
                        name: 'Purple',
                    },
                    {
                        name: 'Red',
                    },
                    {
                        name: 'Teal',
                    },
                    {
                        name: 'Yellow',
                    },
                    {
                        name: 'Black',
                    },
                    {
                        name: 'I\'ll choose on my own',
                        value: false,
                    },
                ],
                when: when.customize,
            },
            {
                type: 'input',
                name: 'PrimaryHex',
                message: 'Enter a hexcode for your primary brand color',
                when: when.primaryColor,
            },
            {
                type: 'list',
                name: 'secondaryColor',
                message: 'Select the closest name for your secondary brand color',
                default: '14px',
                choices: [
                    {
                        name: 'Blue',
                    },
                    {
                        name: 'Green',
                    },
                    {
                        name: 'Orange',
                    },
                    {
                        name: 'Pink',
                    },
                    {
                        name: 'Purple',
                    },
                    {
                        name: 'Red',
                    },
                    {
                        name: 'Teal',
                    },
                    {
                        name: 'Yellow',
                    },
                    {
                        name: 'Black',
                    },
                    {
                        name: 'I\'ll choose on my own',
                        value: false,
                    },
                ],
                when: when.customize,
            },
            {
                type: 'input',
                name: 'secondaryHex',
                message: 'Enter a hexcode for your secondary brand color',
                when: when.secondaryColor,
            },
        ],

    },

    settings: {

        /* Rename Files */
        rename: {
            json: { extname: '.json' },
        },

        /* Copy Install Folders */
        wrench: {

            // overwrite existing files update & install (default theme / definition)
            overwrite: {
                forceDelete: true,
                excludeHiddenUnix: true,
                preserveFiles: false,
            },

            // only create files that don't exist (site theme update)
            merge: {
                forceDelete: false,
                excludeHiddenUnix: true,
                preserveFiles: true,
            },

        },
    },
};