"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const chalk_1 = require("chalk");
const fs = require("fs");
const path = require("path");
const after_compile_1 = require("./after-compile");
const compilerSetup_1 = require("./compilerSetup");
const config_1 = require("./config");
const constants_1 = require("./constants");
const logger = require("./logger");
const servicesHost_1 = require("./servicesHost");
const utils_1 = require("./utils");
const watch_run_1 = require("./watch-run");
const instances = {};
/**
 * The loader is executed once for each file seen by webpack. However, we need to keep
 * a persistent instance of TypeScript that contains all of the files in the program
 * along with definition files and options. This function either creates an instance
 * or returns the existing one. Multiple instances are possible by using the
 * `instance` property.
 */
function getTypeScriptInstance(loaderOptions, loader) {
    if (instances.hasOwnProperty(loaderOptions.instance)) {
        const instance = instances[loaderOptions.instance];
        utils_1.ensureProgram(instance);
        return { instance: instances[loaderOptions.instance] };
    }
    const colors = new chalk_1.default.constructor({ enabled: loaderOptions.colors });
    const log = logger.makeLogger(loaderOptions, colors);
    const compiler = compilerSetup_1.getCompiler(loaderOptions, log);
    if (compiler.errorMessage !== undefined) {
        return { error: utils_1.makeError(colors.red(compiler.errorMessage), undefined) };
    }
    return successfulTypeScriptInstance(loaderOptions, loader, log, colors, compiler.compiler, compiler.compilerCompatible, compiler.compilerDetailsLogMessage);
}
exports.getTypeScriptInstance = getTypeScriptInstance;
function successfulTypeScriptInstance(loaderOptions, loader, log, colors, compiler, compilerCompatible, compilerDetailsLogMessage) {
    const configFileAndPath = config_1.getConfigFile(compiler, colors, loader, loaderOptions, compilerCompatible, log, compilerDetailsLogMessage);
    if (configFileAndPath.configFileError !== undefined) {
        const { message, file } = configFileAndPath.configFileError;
        return {
            error: utils_1.makeError(colors.red('error while reading tsconfig.json:' + constants_1.EOL + message), file)
        };
    }
    const { configFilePath, configFile } = configFileAndPath;
    const basePath = loaderOptions.context || path.dirname(configFilePath || '');
    const configParseResult = config_1.getConfigParseResult(compiler, configFile, basePath);
    if (configParseResult.errors.length > 0 && !loaderOptions.happyPackMode) {
        const errors = utils_1.formatErrors(configParseResult.errors, loaderOptions, colors, compiler, { file: configFilePath }, loader.context);
        loader._module.errors.push(...errors);
        return {
            error: utils_1.makeError(colors.red('error while parsing tsconfig.json'), configFilePath)
        };
    }
    const compilerOptions = compilerSetup_1.getCompilerOptions(configParseResult);
    const files = new Map();
    const otherFiles = new Map();
    // same strategy as https://github.com/s-panferov/awesome-typescript-loader/pull/531/files
    let { getCustomTransformers: customerTransformers } = loaderOptions;
    let getCustomTransformers = Function.prototype;
    if (typeof customerTransformers === 'function') {
        getCustomTransformers = customerTransformers;
    }
    else if (typeof customerTransformers === 'string') {
        try {
            customerTransformers = require(customerTransformers);
        }
        catch (err) {
            throw new Error(`Failed to load customTransformers from "${loaderOptions.getCustomTransformers}": ${err.message}`);
        }
        if (typeof customerTransformers !== 'function') {
            throw new Error(`Custom transformers in "${loaderOptions.getCustomTransformers}" should export a function, got ${typeof getCustomTransformers}`);
        }
        getCustomTransformers = customerTransformers;
    }
    if (loaderOptions.transpileOnly) {
        // quick return for transpiling
        // we do need to check for any issues with TS options though
        const program = configParseResult.projectReferences !== undefined
            ? compiler.createProgram({
                rootNames: configParseResult.fileNames,
                options: configParseResult.options,
                projectReferences: configParseResult.projectReferences
            })
            : compiler.createProgram([], compilerOptions);
        // happypack does not have _module.errors - see https://github.com/TypeStrong/ts-loader/issues/336
        if (!loaderOptions.happyPackMode) {
            const diagnostics = program.getOptionsDiagnostics();
            const errors = utils_1.formatErrors(diagnostics, loaderOptions, colors, compiler, { file: configFilePath || 'tsconfig.json' }, loader.context);
            loader._module.errors.push(...errors);
        }
        instances[loaderOptions.instance] = {
            compiler,
            compilerOptions,
            loaderOptions,
            files,
            otherFiles,
            program,
            dependencyGraph: {},
            reverseDependencyGraph: {},
            transformers: getCustomTransformers(),
            colors
        };
        return { instance: instances[loaderOptions.instance] };
    }
    // Load initial files (core lib files, any files specified in tsconfig.json)
    let normalizedFilePath;
    try {
        const filesToLoad = loaderOptions.onlyCompileBundledFiles
            ? configParseResult.fileNames.filter(fileName => constants_1.dtsDtsxOrDtsDtsxMapRegex.test(fileName))
            : configParseResult.fileNames;
        filesToLoad.forEach(filePath => {
            normalizedFilePath = path.normalize(filePath);
            files.set(normalizedFilePath, {
                text: fs.readFileSync(normalizedFilePath, 'utf-8'),
                version: 0
            });
        });
    }
    catch (exc) {
        return {
            error: utils_1.makeError(colors.red(`A file specified in tsconfig.json could not be found: ${normalizedFilePath}`), normalizedFilePath)
        };
    }
    // if allowJs is set then we should accept js(x) files
    const scriptRegex = configParseResult.options.allowJs === true
        ? /\.tsx?$|\.jsx?$/i
        : /\.tsx?$/i;
    const instance = (instances[loaderOptions.instance] = {
        compiler,
        compilerOptions,
        loaderOptions,
        files,
        otherFiles,
        languageService: null,
        version: 0,
        transformers: getCustomTransformers(),
        dependencyGraph: {},
        reverseDependencyGraph: {},
        modifiedFiles: null,
        colors
    });
    if (!loader._compiler.hooks) {
        throw new Error("You may be using an old version of webpack; please check you're using at least version 4");
    }
    if (loaderOptions.experimentalWatchApi && compiler.createWatchProgram) {
        log.logInfo('Using watch api');
        // If there is api available for watch, use it instead of language service
        instance.watchHost = servicesHost_1.makeWatchHost(scriptRegex, log, loader, instance, loaderOptions.appendTsSuffixTo, loaderOptions.appendTsxSuffixTo, configParseResult.projectReferences);
        instance.watchOfFilesAndCompilerOptions = compiler.createWatchProgram(instance.watchHost);
        instance.program = instance.watchOfFilesAndCompilerOptions
            .getProgram()
            .getProgram();
    }
    else {
        const servicesHost = servicesHost_1.makeServicesHost(scriptRegex, log, loader, instance, loaderOptions.experimentalFileCaching, configParseResult.projectReferences);
        instance.languageService = compiler.createLanguageService(servicesHost.servicesHost, compiler.createDocumentRegistry());
        if (servicesHost.clearCache !== null) {
            loader._compiler.hooks.watchRun.tap('ts-loader', servicesHost.clearCache);
        }
    }
    loader._compiler.hooks.afterCompile.tapAsync('ts-loader', after_compile_1.makeAfterCompile(instance, configFilePath));
    loader._compiler.hooks.watchRun.tapAsync('ts-loader', watch_run_1.makeWatchRun(instance));
    return { instance };
}
function getEmitOutput(instance, filePath) {
    const program = utils_1.ensureProgram(instance);
    if (program !== undefined) {
        const outputFiles = [];
        const writeFile = (fileName, text, writeByteOrderMark) => outputFiles.push({ name: fileName, writeByteOrderMark, text });
        const sourceFile = program.getSourceFile(filePath);
        // The source file will be undefined if it’s part of an unbuilt project reference
        if (sourceFile !== undefined || !utils_1.isUsingProjectReferences(instance)) {
            program.emit(sourceFile, writeFile, 
            /*cancellationToken*/ undefined, 
            /*emitOnlyDtsFiles*/ false, instance.transformers);
        }
        return outputFiles;
    }
    else {
        // Emit Javascript
        return instance.languageService.getProgram().getSourceFile(filePath) ===
            undefined
            ? []
            : instance.languageService.getEmitOutput(filePath).outputFiles;
    }
}
exports.getEmitOutput = getEmitOutput;
