/**
 * Copyright (c) Microsoft Corporation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import type { BrowserContextOptions } from '../../../..';
import { LanguageGenerator, LanguageGeneratorOptions, toSignalMap } from './language';
import { ActionInContext } from './codeGenerator';
import { Action, actionTitle } from './recorderActions';
import { toModifiers } from './utils';
import deviceDescriptors = require('../../deviceDescriptors');
import { JavaScriptFormatter } from './javascript';

export class JavaLanguageGenerator implements LanguageGenerator {
  id = 'java';
  fileName = '<java>';
  highlighter = 'java';

  generateAction(actionInContext: ActionInContext): string {
    const { action, pageAlias } = actionInContext;
    const formatter = new JavaScriptFormatter(6);
    formatter.newLine();
    formatter.add('// ' + actionTitle(action));

    if (action.name === 'openPage') {
      formatter.add(`Page ${pageAlias} = context.newPage();`);
      if (action.url && action.url !== 'about:blank' && action.url !== 'chrome://newtab/')
        formatter.add(`${pageAlias}.navigate("${action.url}");`);
      return formatter.format();
    }

    const subject = actionInContext.isMainFrame ? pageAlias :
      (actionInContext.frameName ?
        `${pageAlias}.frame(${quote(actionInContext.frameName)})` :
        `${pageAlias}.frameByUrl(${quote(actionInContext.frameUrl)})`);

    const signals = toSignalMap(action);

    if (signals.dialog) {
      formatter.add(`  ${pageAlias}.onceDialog(dialog -> {
        System.out.println(String.format("Dialog message: %s", dialog.message()));
        dialog.dismiss();
      });`);
    }

    const actionCall = this._generateActionCall(action);
    let code = `${subject}.${actionCall};`;

    if (signals.popup) {
      code = `Page ${signals.popup.popupAlias} = ${pageAlias}.waitForPopup(() -> {
        ${code}
      });`;
    }

    if (signals.download) {
      code = `Download download = ${pageAlias}.waitForDownload(() -> {
        ${code}
      });`;
    }

    if (signals.waitForNavigation) {
      code = `
      // ${pageAlias}.waitForNavigation(new Page.WaitForNavigationOptions().withUrl(${quote(signals.waitForNavigation.url)}), () ->
      ${pageAlias}.waitForNavigation(() -> {
        ${code}
      });`;
    }

    formatter.add(code);

    if (signals.assertNavigation)
      formatter.add(`// assert ${pageAlias}.url().equals(${quote(signals.assertNavigation.url)});`);
    return formatter.format();
  }

  private _generateActionCall(action: Action): string {
    switch (action.name) {
      case 'openPage':
        throw Error('Not reached');
      case 'closePage':
        return 'close()';
      case 'click': {
        let method = 'click';
        if (action.clickCount === 2)
          method = 'dblclick';
        return `${method}(${quote(action.selector)})`;
      }
      case 'check':
        return `check(${quote(action.selector)})`;
      case 'uncheck':
        return `uncheck(${quote(action.selector)})`;
      case 'fill':
        return `fill(${quote(action.selector)}, ${quote(action.text)})`;
      case 'setInputFiles':
        return `setInputFiles(${quote(action.selector)}, ${formatPath(action.files.length === 1 ? action.files[0] : action.files)})`;
      case 'press': {
        const modifiers = toModifiers(action.modifiers);
        const shortcut = [...modifiers, action.key].join('+');
        return `press(${quote(action.selector)}, ${quote(shortcut)})`;
      }
      case 'navigate':
        return `navigate(${quote(action.url)})`;
      case 'select':
        return `selectOption(${quote(action.selector)}, ${formatSelectOption(action.options.length > 1 ? action.options : action.options[0])})`;
    }
  }

  generateHeader(options: LanguageGeneratorOptions): string {
    const formatter = new JavaScriptFormatter();
    formatter.add(`
    import com.microsoft.playwright.*;
    import com.microsoft.playwright.options.*;

    public class Example {
      public static void main(String[] args) {
        try (Playwright playwright = Playwright.create()) {
          Browser browser = playwright.${options.browserName}().launch(${formatLaunchOptions(options.launchOptions)});
          BrowserContext context = browser.newContext(${formatContextOptions(options.contextOptions, options.deviceName)});`);
    return formatter.format();
  }

  generateFooter(saveStorage: string | undefined): string {
    const storageStateLine = saveStorage ? `\n      context.storageState(new BrowserContext.StorageStateOptions().withPath(${quote(saveStorage)}));` : '';
    return `\n      // ---------------------${storageStateLine}
    }
  }
}`;
  }
}

function formatPath(files: string | string[]): string {
  if (Array.isArray(files)) {
    if (files.length === 0)
      return 'new Path[0]';
    return `new Path[] {${files.map(s => 'Paths.get(' + quote(s) + ')').join(', ')}}`;
  }
  return `Paths.get(${quote(files)})`;
}

function formatSelectOption(options: string | string[]): string {
  if (Array.isArray(options)) {
    if (options.length === 0)
      return 'new String[0]';
    return `new String[] {${options.map(s => quote(s)).join(', ')}}`;
  }
  return quote(options);
}

function formatLaunchOptions(options: any): string {
  const lines = [];
  if (!Object.keys(options).length)
    return '';
  lines.push('new BrowserType.LaunchOptions()');
  if (typeof options.headless === 'boolean')
    lines.push(`  .withHeadless(false)`);
  return lines.join('\n');
}

function formatContextOptions(contextOptions: BrowserContextOptions, deviceName: string | undefined): string {
  const lines = [];
  if (!Object.keys(contextOptions).length && !deviceName)
    return '';
  const device = deviceName ? deviceDescriptors[deviceName] : {};
  const options: BrowserContextOptions = { ...device, ...contextOptions };
  lines.push('new Browser.NewContextOptions()');
  if (options.colorScheme)
    lines.push(`  .withColorScheme(ColorScheme.${options.colorScheme.toUpperCase()})`);
  if (options.geolocation)
    lines.push(`  .withGeolocation(${options.geolocation.latitude}, ${options.geolocation.longitude})`);
  if (options.locale)
    lines.push(`  .withLocale("${options.locale}")`);
  if (options.proxy)
    lines.push(`  .withProxy(new Proxy("${options.proxy.server}"))`);
  if (options.timezoneId)
    lines.push(`  .withTimezoneId("${options.timezoneId}")`);
  if (options.userAgent)
    lines.push(`  .withUserAgent("${options.userAgent}")`);
  if (options.viewport)
    lines.push(`  .withViewportSize(${options.viewport.width}, ${options.viewport.height})`);
  if (options.deviceScaleFactor)
    lines.push(`  .withDeviceScaleFactor(${options.deviceScaleFactor})`);
  if (options.isMobile)
    lines.push(`  .withIsMobile(${options.isMobile})`);
  if (options.hasTouch)
    lines.push(`  .withHasTouch(${options.hasTouch})`);
  if (options.storageState)
    lines.push(`  .withStorageStatePath(Paths.get(${quote(options.storageState as string)}))`);

  return lines.join('\n');
}

function quote(text: string, char: string = '\"') {
  if (char === '\'')
    return char + text.replace(/[']/g, '\\\'') + char;
  if (char === '"')
    return char + text.replace(/["]/g, '\\"') + char;
  if (char === '`')
    return char + text.replace(/[`]/g, '\\`') + char;
  throw new Error('Invalid escape char');
}