'use strict';

function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }

var fs = _interopDefault(require('fs'));
var path = _interopDefault(require('path'));
var File = _interopDefault(require('vinyl'));
var through = _interopDefault(require('through2'));
var PluginError = _interopDefault(require('plugin-error'));

var CharCodes;
(function (CharCodes) {
    CharCodes[CharCodes["LEFT_CURLY_BRACE"] = 123] = "LEFT_CURLY_BRACE";
    CharCodes[CharCodes["RIGHT_CURLY_BRACE"] = 125] = "RIGHT_CURLY_BRACE";
    CharCodes[CharCodes["SINGLE_QUOTE"] = 39] = "SINGLE_QUOTE";
    CharCodes[CharCodes["DOUBLE_QUOTE"] = 34] = "DOUBLE_QUOTE";
    CharCodes[CharCodes["BACK_QUOTE"] = 96] = "BACK_QUOTE";
    CharCodes[CharCodes["BACK_SLASH"] = 92] = "BACK_SLASH";
    CharCodes[CharCodes["SLASH"] = 47] = "SLASH";
    CharCodes[CharCodes["LESS_THAN"] = 60] = "LESS_THAN";
    CharCodes[CharCodes["GREATER_THAN"] = 62] = "GREATER_THAN";
    CharCodes[CharCodes["MINUS"] = 45] = "MINUS";
    CharCodes[CharCodes["UNDER_LINE"] = 95] = "UNDER_LINE";
    CharCodes[CharCodes["EQUALS"] = 61] = "EQUALS";
    CharCodes[CharCodes["EXCLAMATION"] = 33] = "EXCLAMATION";
    CharCodes[CharCodes["COLON"] = 58] = "COLON";
    CharCodes[CharCodes["LEFT_PAREN"] = 40] = "LEFT_PAREN";
    CharCodes[CharCodes["RIGHT_PAREN"] = 41] = "RIGHT_PAREN";
    CharCodes[CharCodes["DOT"] = 46] = "DOT";
    CharCodes[CharCodes["ASTERISK"] = 42] = "ASTERISK";
    CharCodes[CharCodes["TAB"] = 9] = "TAB";
    CharCodes[CharCodes["LINE_FEED"] = 10] = "LINE_FEED";
    CharCodes[CharCodes["CARRIAGE_RETURN"] = 13] = "CARRIAGE_RETURN";
    CharCodes[CharCodes["SPACE"] = 32] = "SPACE";
    CharCodes[CharCodes["UPPER_A"] = 65] = "UPPER_A";
    CharCodes[CharCodes["UPPER_Z"] = 90] = "UPPER_Z";
    CharCodes[CharCodes["LOWER_A"] = 97] = "LOWER_A";
    CharCodes[CharCodes["LOWER_Z"] = 122] = "LOWER_Z";
    CharCodes[CharCodes["_0"] = 48] = "_0";
    CharCodes[CharCodes["_9"] = 57] = "_9";
    CharCodes[CharCodes["$"] = 36] = "$";
})(CharCodes || (CharCodes = {}));

const parse = require('format-message-parse');
/**
 * Use parser from format-message-parse
 */
function parseTranslation(pattern) {
    return parse(pattern);
}

var WxmlState;
(function (WxmlState) {
    WxmlState[WxmlState["NORMAL"] = 1] = "NORMAL";
    WxmlState[WxmlState["WXS"] = 2] = "WXS";
    WxmlState[WxmlState["INT"] = 4] = "INT";
})(WxmlState || (WxmlState = {}));

var TranslationFunction;
(function (TranslationFunction) {
    TranslationFunction["default"] = "t";
})(TranslationFunction || (TranslationFunction = {}));
var I18nModuleName;
(function (I18nModuleName) {
    I18nModuleName["default"] = "i18n";
})(I18nModuleName || (I18nModuleName = {}));
var LocaleVariable;
(function (LocaleVariable) {
    LocaleVariable["default"] = "$_locale";
})(LocaleVariable || (LocaleVariable = {}));

const PLUGIN_NAME = '@miniprogram-i18n/gulp-i18n-locales';
const DEFAULT_WXS_FILENAME = 'locales.wxs';
const DEFAULT_JS_FILENAME = 'locales.js';
const DEFAULT_LOCALE = 'en-US';
const DEFAULT_FALLBACK_LOCALE = 'en-US';
const CORE_PATH = path.dirname(require.resolve('@miniprogram-i18n/core/package.json'));
function getWxsCode() {
    const code = fs.readFileSync(path.join(CORE_PATH, '/wxs.js'), 'utf-8');
    // FIXME: function name maybe mangled
    const runner = `module.exports.t = Interpreter.getMessageInterpreter(translations, fallbackLocale)`;
    return [code, runner].join('\n');
}
let firstFile;
const localeFile = {};
function parseTranslations(object) {
    const keys = Object.keys(object);
    for (const key of keys) {
        const val = object[key];
        if (typeof val === 'string') {
            object[key] = parseTranslation(val);
        }
        // TODO: this is currently not supported
        if (typeof val === 'object') {
            object[key] = parseTranslations(val);
        }
    }
    return object;
}
const gulpI18nLocalesLoader = (options) => {
    if (!options)
        options = {};
    function buffer(file, _, cb) {
        // Ignore empty file or not json files
        if (file.isNull() || path.extname(file.path) !== '.json') {
            return cb(null, file);
        }
        if (file.isStream()) {
            return cb(new PluginError(PLUGIN_NAME, 'Streaming data is not supported'));
        }
        if (!file.contents) {
            return cb(null, file);
        }
        if (!firstFile)
            firstFile = file;
        const basename = path.basename(file.path);
        const localeName = basename.split('.')[0];
        let content = null;
        try {
            content = JSON.parse(file.contents.toString('utf-8'));
            if (!localeFile[localeName])
                localeFile[localeName] = {};
            localeFile[localeName] = Object.assign({}, localeFile[localeName], parseTranslations(content));
        }
        catch (err) {
            return cb(new PluginError(PLUGIN_NAME, err));
        }
        cb();
    }
    function endStream(cb) {
        if (!firstFile)
            return cb();
        const wxsFileName = options && options.wxsFileName || DEFAULT_WXS_FILENAME;
        const jsFileName = options && options.jsFileName || DEFAULT_JS_FILENAME;
        const localeString = JSON.stringify(localeFile);
        const defaultLocale = options && options.defaultLocale || DEFAULT_LOCALE;
        const fallbackLocale = options && options.fallbackLocale || DEFAULT_FALLBACK_LOCALE;
        const wxsContent = `var fallbackLocale='${fallbackLocale}';var translations=${localeString};\n${getWxsCode()}`;
        const jsContent = `module.exports.fallbackLocale='${fallbackLocale}';module.exports.defaultLocale='${defaultLocale}';module.exports.translations=${localeString};`;
        const wxsFile = new File({
            cwd: firstFile.cwd,
            base: firstFile.base,
            path: path.join(firstFile.base, wxsFileName),
            contents: Buffer.from(wxsContent),
        });
        const jsFile = new File({
            cwd: firstFile.cwd,
            base: firstFile.base,
            path: path.join(firstFile.base, jsFileName),
            contents: Buffer.from(jsContent),
        });
        this.push(wxsFile);
        this.push(jsFile);
        cb();
    }
    return through.obj(buffer, endStream);
};

module.exports = gulpI18nLocalesLoader;