const fs = require('fs');
const path = require('path');


//读取系统配置文件
const systemConfig = require(path.resolve(process.cwd(),'config/index'));
const appDirectory = fs.realpathSync(process.cwd());
const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
const { systemPath } = systemConfig;
const appSrc = resolveApp(systemPath.appSrc);
const moduleFileExtensions:Array<string> = [
  "ts",
  "tsx",
  "json",
  "js",
  "png"
];

/**
 * 文件路径
*/
const resolveModule = (resolveFn, filePath:string) => {
  const extension = moduleFileExtensions.find((extension:string) =>
    fs.existsSync(resolveFn(`${filePath}.${extension}`))
  );
  if (extension) {
    return resolveFn(`${filePath}.${extension}`);
  }

  return resolveFn(`${filePath}.js`);
};

/** 解析 appPathAlias 配置 */
const transformAppPathAlias = (appPathAlias) => {(<any>Object).entries(appPathAlias).forEach((path,index)=>{path[1]=`${appSrc}/${path[1]}`;appPathAlias[path[0]]=path[1]}); return appPathAlias};

module.exports={
  appSrc,	
  appdllLibrary: resolveModule(resolveApp,systemPath.appdllLibrary),
  appTsConfig: resolveModule(resolveApp,systemPath.appTsConfig),
  appIndex: resolveModule(resolveApp,systemPath.appIndex),
  appFavicon: resolveModule(resolveApp,systemPath.appFavicon),
  appNodeModules: resolveApp(systemPath.appNodeModules),
  appStatic: resolveApp(systemPath.appStatic),
  appLog: resolveApp(systemPath.appLog),
  appBuild: resolveApp(systemPath.appBuild),
  appLoader: resolveApp(systemPath.appLoader),
  appPathAlias: transformAppPathAlias(systemPath.appPathAlias),                 
  appExcludeCssModule:systemPath.appExcludeCssModule&&systemPath.appExcludeCssModule.map((path,index)=>new RegExp(`[\\\\/]node_modules[\\\\/].*${path}`)),
  appConfig:systemPath.appConfig&&systemPath.appConfig.map((path,index)=>resolveApp(path)),
  appTsLoader:systemPath.appTsLoader&&systemPath.appTsLoader.map((path,index)=>resolveApp(path)),
  webpackTsConfig: resolveModule(resolveApp,systemPath.webpackTsConfig),
}

interface Array<T> {
  find(predicate: (search: T) => boolean) : T;
}