import { readFile, writeFile, replaceInFile } from './fs';
import { execAndWaitForOutputToMatch, npm, silentNpm, ng } from './process';
import { getGlobalVariable } from './env';

const packages = require('../../../../lib/packages').packages;


const tsConfigPath = 'tsconfig.json';


export function updateJsonFile(filePath: string, fn: (json: any) => any | void) {
  return readFile(filePath)
    .then(tsConfigJson => {
      const tsConfig = JSON.parse(tsConfigJson);
      const result = fn(tsConfig) || tsConfig;

      return writeFile(filePath, JSON.stringify(result, null, 2));
    });
}


export function updateTsConfig(fn: (json: any) => any | void) {
  return updateJsonFile(tsConfigPath, fn);
}


export function ngServe(...args: string[]) {
  return execAndWaitForOutputToMatch('ng',
    ['serve', ...args],
    /: Compiled successfully./);
}


export function createProject(name: string, ...args: string[]) {
  const argv: any = getGlobalVariable('argv');

  return Promise.resolve()
    .then(() => process.chdir(getGlobalVariable('tmp-root')))
    .then(() => ng('new', name, '--skip-install', ...args))
    .then(() => process.chdir(name))
    .then(() => useBuiltPackages())
    .then(() => useCIChrome('e2e'))
    .then(() => useCIChrome('src'))
    .then(() => useDevKitSnapshots())
    .then(() => argv['ng2'] ? useNg2() : Promise.resolve())
    .then(() => argv['ng4'] ? useNg4() : Promise.resolve())
    .then(() => argv['ng-snapshots'] || argv['ng-tag'] ? useSha() : Promise.resolve())
    .then(() => console.log(`Project ${name} created... Installing npm.`))
    .then(() => silentNpm('install'))
    .then(() => useCIDefaults(name));
}


export function useDevKit(devkitRoot: string) {
  return Promise.resolve()
    .then(() => {
      // Load the packages info for devkit.
      const devkitPackages = require(devkitRoot + '/lib/packages').packages;

      return updateJsonFile('package.json', json => {
          if (!json['dependencies']) {
            json['dependencies'] = {};
          }
          if (!json['devDependencies']) {
            json['devDependencies'] = {};
          }

          for (const packageName of Object.keys(devkitPackages)) {
            if (json['dependencies'].hasOwnProperty(packageName)) {
              json['dependencies'][packageName] = devkitPackages[packageName].tar;
            } else if (json['devDependencies'].hasOwnProperty(packageName)) {
              json['devDependencies'][packageName] = devkitPackages[packageName].tar;
            }
          }
        });
    });
}

export function useDevKitSnapshots() {
  return updateJsonFile('package.json', json => {
    // TODO: actually add these.
    // These were not working on any test that ran `npm i`.
    // json['devDependencies']['@angular-devkit/build-angular'] =
    //   'github:angular/angular-devkit-build-angular-builds';
    // // By adding build-ng-packagr preemptively, adding a lib will not update it.
    // json['devDependencies']['@angular-devkit/build-ng-packagr'] =
    //   'github:angular/angular-devkit-build-ng-packagr-builds';
  });
}

export function useBuiltPackages() {
  return Promise.resolve()
    .then(() => updateJsonFile('package.json', json => {
      if (!json['dependencies']) {
        json['dependencies'] = {};
      }
      if (!json['devDependencies']) {
        json['devDependencies'] = {};
      }

      for (const packageName of Object.keys(packages)) {
        if (json['dependencies'].hasOwnProperty(packageName)) {
          json['dependencies'][packageName] = packages[packageName].tar;
        } else if (json['devDependencies'].hasOwnProperty(packageName)) {
          json['devDependencies'][packageName] = packages[packageName].tar;
        }
      }
    }));
}

export function useSha() {
  const argv = getGlobalVariable('argv');
  if (argv['ng-snapshots'] || argv['ng-tag']) {
    // We need more than the sha here, version is also needed. Examples of latest tags:
    // 7.0.0-beta.4+dd2a650
    // 6.1.6+4a8d56a
    const label = argv['ng-tag'] ? argv['ng-tag'] : '';
    return updateJsonFile('package.json', json => {
      // Install over the project with snapshot builds.
      Object.keys(json['dependencies'] || {})
        .filter(name => name.match(/^@angular\//))
        .forEach(name => {
          const pkgName = name.split(/\//)[1];
          if (pkgName == 'cli') {
            return;
          }
          json['dependencies'][`@angular/${pkgName}`]
            = `github:angular/${pkgName}-builds${label}`;
        });

      Object.keys(json['devDependencies'] || {})
        .filter(name => name.match(/^@angular\//))
        .forEach(name => {
          const pkgName = name.split(/\//)[1];
          if (pkgName == 'cli') {
            return;
          }
          json['devDependencies'][`@angular/${pkgName}`]
            = `github:angular/${pkgName}-builds${label}`;
        });

      json['devDependencies']['typescript'] = '~3.0.1';
    });
  } else {
    return Promise.resolve();
  }
}

export function useNgVersion(version: string) {
  return updateJsonFile('package.json', json => {
    // Install over the project with specific versions.
    Object.keys(json['dependencies'] || {})
      .filter(name => name.match(/^@angular\//))
      .forEach(name => {
        const pkgName = name.split(/\//)[1];
        if (pkgName == 'cli') {
          return;
        }
        json['dependencies'][`@angular/${pkgName}`] = version;
      });

    Object.keys(json['devDependencies'] || {})
      .filter(name => name.match(/^@angular\//))
      .forEach(name => {
        const pkgName = name.split(/\//)[1];
        if (pkgName == 'cli') {
          return;
        }
        json['devDependencies'][`@angular/${pkgName}`] = version;
      });
    // TODO: determine the appropriate version for the Angular version
    if (version.startsWith('^5')) {
      json['devDependencies']['typescript'] = '~2.5.0';
      json['dependencies']['rxjs'] = '5.5.8';
    } else {
      json['devDependencies']['typescript'] = '~2.7.0';
      json['dependencies']['rxjs'] = '6.0.0-rc.0';
    }
  });
}

export function useCIDefaults(projectName = 'test-project') {
  return updateJsonFile('angular.json', workspaceJson => {
    // Disable progress reporting on CI to reduce spam.
    const appTargets = workspaceJson.projects[projectName].targets;
    appTargets.build.options.progress = false;
    appTargets.test.options.progress = false;
    // Disable auto-updating webdriver in e2e.
    const e2eTargets = workspaceJson.projects[projectName + '-e2e'].targets;
    e2eTargets.e2e.options.webdriverUpdate = false;
  })
  .then(() => updateJsonFile('package.json', json => {
    // We want to always use the same version of webdriver but can only do so on CircleCI.
    // Appveyor and Travis will use latest Chrome stable.
    // CircleCI (via ngcontainer:0.1.1) uses Chrome 63.0.3239.84.
    // Appveyor (via chocolatey) cannot use older versions of Chrome at all:
    // https://github.com/chocolatey/chocolatey-coreteampackages/tree/master/automatic/googlechrome
    // webdriver 2.33 matches Chrome 63.0.3239.84.
    // webdriver 2.37 matches Chrome 65.0.3325.18100 (latest stable).
    // The webdriver versions for latest stable will need to be manually updated.
    const webdriverVersion = process.env['CIRCLECI'] ? '2.33' : '2.37';
    const driverOption = process.env['CHROMEDRIVER_VERSION_ARG']
                         || `--versions.chrome ${webdriverVersion}`;
    json['scripts']['webdriver-update'] = 'webdriver-manager update' +
      ` --standalone false --gecko false ${driverOption}`;
  }))
  .then(() => npm('run', 'webdriver-update'));
}

export function useCIChrome(projectDir: string) {
  // There's a race condition happening in Chrome. Enabling logging in chrome used by
  // protractor actually fixes it. Logging is piped to a file so it doesn't affect our setup.
  // --no-sandbox is needed for Circle CI.
  // Travis can use headless chrome, but not appveyor.
  return Promise.resolve()
    .then(() => replaceInFile(`${projectDir}/protractor.conf.js`,
      `'browserName': 'chrome'`,
      `'browserName': 'chrome',
        chromeOptions: {
          args: [
            "--enable-logging",
            // "--no-sandbox",
            // "--headless"
          ]
        }
    `))
    // Not a problem if the file can't be found.
    // .catch(() => null)
    // .then(() => replaceInFile(`${projectDir}/karma.conf.js`, `browsers: ['Chrome'],`,
    //   `browsers: ['ChromeCI'],
    //   customLaunchers: {
    //     ChromeCI: {
    //       base: 'ChromeHeadless',
    //       flags: ['--no-sandbox']
    //     }
    //   },
    // `))
    .catch(() => null);
}

// Convert a Angular 5 project to Angular 2.
export function useNg2() {
  const ng2Deps: any = {
    'dependencies': {
      '@angular/common': '^2.4.0',
      '@angular/compiler': '^2.4.0',
      '@angular/core': '^2.4.0',
      '@angular/forms': '^2.4.0',
      '@angular/http': '^2.4.0',
      '@angular/platform-browser': '^2.4.0',
      '@angular/platform-browser-dynamic': '^2.4.0',
      '@angular/router': '^3.4.0',
      'zone.js': '^0.7.4'
    },
    'devDependencies': {
      '@angular/compiler-cli': '^2.4.0',
      '@types/jasmine': '~2.2.0',
      '@types/jasminewd2': undefined,
      'typescript': '~2.0.0'
    }
  };

  const tsconfigAppJson: any = {
    'compilerOptions': {
      'sourceMap': true,
      'declaration': false,
      'moduleResolution': 'node',
      'emitDecoratorMetadata': true,
      'experimentalDecorators': true,
      'target': 'es5',
      'lib': [
        'es2017',
        'dom'
      ],
      'outDir': '../out-tsc/app',
      'module': 'es2015',
      'baseUrl': '',
      'types': []
    },
    'exclude': [
      'test.ts',
      '**/*.spec.ts'
    ]
  };

  const tsconfigSpecJson: any = {
    'compilerOptions': {
      'sourceMap': true,
      'declaration': false,
      'moduleResolution': 'node',
      'emitDecoratorMetadata': true,
      'experimentalDecorators': true,
      'lib': [
        'es2017',
        'dom'
      ],
      'outDir': '../out-tsc/spec',
      'module': 'commonjs',
      'target': 'es5',
      'baseUrl': '',
      'types': [
        'jasmine',
        'node'
      ]
    },
    'files': [
      'test.ts'
    ],
    'include': [
      '**/*.spec.ts',
      '**/*.d.ts'
    ]
  };

  const tsconfigE2eJson: any = {
    'compilerOptions': {
      'sourceMap': true,
      'declaration': false,
      'moduleResolution': 'node',
      'emitDecoratorMetadata': true,
      'experimentalDecorators': true,
      'lib': [
        'es2017'
      ],
      'outDir': '../out-tsc/e2e',
      'module': 'commonjs',
      'target': 'es5',
      'types': [
        'jasmine',
        'node'
      ]
    }
  };


  return Promise.resolve()
    .then(() => updateJsonFile('package.json', json => {
      Object.keys(ng2Deps['dependencies']).forEach(pkgName => {
        json['dependencies'][pkgName] = ng2Deps['dependencies'][pkgName];
      });
      Object.keys(ng2Deps['devDependencies']).forEach(pkgName => {
        json['devDependencies'][pkgName] = ng2Deps['devDependencies'][pkgName];
      });
      console.log(JSON.stringify(json));
    }))
    .then(() => updateJsonFile('src/tsconfig.app.json', json =>
      Object.assign(json, tsconfigAppJson)))
    .then(() => updateJsonFile('src/tsconfig.spec.json', json =>
      Object.assign(json, tsconfigSpecJson)))
    .then(() => updateJsonFile('e2e/tsconfig.e2e.json', json =>
      Object.assign(json, tsconfigE2eJson)))
    .then(() => replaceInFile('src/test.ts', 'import \'zone.js/dist/zone-testing\';', `
      import 'zone.js/dist/long-stack-trace-zone';
      import 'zone.js/dist/proxy.js';
      import 'zone.js/dist/sync-test';
      import 'zone.js/dist/jasmine-patch';
      import 'zone.js/dist/async-test';
      import 'zone.js/dist/fake-async-test';
    `));
}

// Convert a Angular 5 project to Angular 4.
export function useNg4() {
  const ng4Deps: any = {
    'dependencies': {
      '@angular/common': '^4.4.6',
      '@angular/compiler': '^4.4.6',
      '@angular/core': '^4.4.6',
      '@angular/forms': '^4.4.6',
      '@angular/http': '^4.4.6',
      '@angular/platform-browser': '^4.4.6',
      '@angular/platform-browser-dynamic': '^4.4.6',
      '@angular/router': '^4.4.6',
      'zone.js': '^0.8.14'
    },
    'devDependencies': {
      '@angular/compiler-cli': '^4.4.6',
      'typescript': '~2.3.3'
    }
  };


  return Promise.resolve()
    .then(() => updateJsonFile('package.json', json => {
      Object.keys(ng4Deps['dependencies']).forEach(pkgName => {
        json['dependencies'][pkgName] = ng4Deps['dependencies'][pkgName];
      });
      Object.keys(ng4Deps['devDependencies']).forEach(pkgName => {
        json['devDependencies'][pkgName] = ng4Deps['devDependencies'][pkgName];
      });
      console.log(JSON.stringify(json));
    }));
}