/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {HtmlParser} from '@angular/compiler/src/html_parser';
import {ExtractionResult, extractAstMessages} from '@angular/compiler/src/i18n/extractor';
import {beforeEach, ddescribe, describe, expect, iit, inject, it, xdescribe, xit} from '@angular/core/testing/testing_internal';

import {serializeHtmlAst} from '../html_ast_serializer_spec'

export function main() {
  ddescribe(
      'MessageExtractor',
      () => {
        function getExtractionResult(
            html: string, implicitTags: string[],
            implicitAttrs: {[k: string]: string[]}): ExtractionResult {
          const htmlParser = new HtmlParser();
          const parseResult = htmlParser.parse(html, 'extractor spec', true);
          if (parseResult.errors.length > 1) {
            throw Error(`unexpected parse errors: ${parseResult.errors.join('\n')}`);
          }

          return extractAstMessages(parseResult.rootNodes, implicitTags, implicitAttrs);
        }

        function extract(
            html: string, implicitTags: string[] = [],
            implicitAttrs: {[k: string]: string[]} = {}): [string[], string, string][] {
          const messages = getExtractionResult(html, implicitTags, implicitAttrs).messages;

          // clang-format off
          // https://github.com/angular/clang-format/issues/35
          return messages.map(
              message => [serializeHtmlAst(message.ast), message.meaning, message.description, ]) as [string[], string, string][];
          // clang-format on
        }

        function extractErrors(
            html: string, implicitTags: string[] = [],
            implicitAttrs: {[k: string]: string[]} = {}): any[] {
          const errors = getExtractionResult(html, implicitTags, implicitAttrs).errors;

          return errors.map((e): [string, string] => [e.msg, e.span.toString()]);
        }

        describe('elements', () => {
          it('should extract from elements', () => {
            expect(extract('<div i18n="m|d">text<span>nested</span></div>')).toEqual([
              [['text', '<span>nested</span>'], 'm', 'd'],
            ]);
          });

          it('should not create a message for empty elements',
             () => { expect(extract('<div i18n="m|d"></div>')).toEqual([]); });
        });

        describe('blocks', () => {
          it('should extract from blocks', () => {
            expect(extract(`<!-- i18n: meaning1|desc1 -->message1<!-- /i18n -->
         <!-- i18n: meaning2 -->message2<!-- /i18n -->
         <!-- i18n -->message3<!-- /i18n -->`))
                .toEqual([
                  [['message1'], 'meaning1', 'desc1'],
                  [['message2'], 'meaning2', ''],
                  [['message3'], '', ''],
                ]);
          });

          it('should extract all siblings', () => {
            expect(
                extract(
                    `<!-- i18n -->text<p>html<b>nested</b></p>{count, plural, =0 {<span>html</span>}}{{interp}}<!-- /i18n -->`))
                .toEqual([
                  [['{count, plural, =0 {<span>html</span>}}'], '', ''],
                  [
                    [
                      'text', '<p>html<b>nested</b></p>', '{count, plural, =0 {<span>html</span>}}',
                      '{{interp}}'
                    ],
                    '', ''
                  ],
                ]);
          });

          it('should ignore other comments', () => {
            expect(extract(`<!-- i18n: meaning1|desc1 --><!-- other -->message1<!-- /i18n -->`))
                .toEqual([
                  [['message1'], 'meaning1', 'desc1'],
                ]);
          });

          it('should not create a message for empty blocks',
             () => { expect(extract(`<!-- i18n: meaning1|desc1 --><!-- /i18n -->`)).toEqual([]); });
        });

        describe('ICU messages', () => {
          it('should extract ICU messages from translatable elements', () => {
            // single message when ICU is the only children
            expect(extract('<div i18n="m|d">{count, plural, =0 {text}}</div>')).toEqual([
              [['{count, plural, =0 {text}}'], 'm', 'd'],
            ]);

            // one message for the element content and one message for the ICU
            expect(extract('<div i18n="m|d">before{count, plural, =0 {text}}after</div>')).toEqual([
              [['before', '{count, plural, =0 {text}}', 'after'], 'm', 'd'],
              [['{count, plural, =0 {text}}'], '', ''],
            ]);
          });

          it('should extract ICU messages from translatable block', () => {
            // single message when ICU is the only children
            expect(extract('<!-- i18n:m|d -->{count, plural, =0 {text}}<!-- /i18n -->')).toEqual([
              [['{count, plural, =0 {text}}'], 'm', 'd'],
            ]);

            // one message for the block content and one message for the ICU
            expect(extract('<!-- i18n:m|d -->before{count, plural, =0 {text}}after<!-- /i18n -->'))
                .toEqual([
                  [['{count, plural, =0 {text}}'], '', ''],
                  [['before', '{count, plural, =0 {text}}', 'after'], 'm', 'd'],
                ]);
          });

          it('should not extract ICU messages outside of i18n sections',
             () => { expect(extract('{count, plural, =0 {text}}')).toEqual([]); });

          it('should not extract nested ICU messages', () => {
            expect(extract('<div i18n="m|d">{count, plural, =0 { {sex, gender, =m {m}} }}</div>'))
                .toEqual([
                  [['{count, plural, =0 {{sex, gender, =m {m}} }}'], 'm', 'd'],
                ]);
          });
        });

        describe('attributes', () => {
          it('should extract from attributes outside of translatable section', () => {
            expect(extract('<div i18n-title="m|d" title="msg"></div>')).toEqual([
              [['title="msg"'], 'm', 'd'],
            ]);
          });

          it('should extract from attributes in translatable element', () => {
            expect(extract('<div i18n><p><b i18n-title="m|d" title="msg"></b></p></div>')).toEqual([
              [['<p><b i18n-title="m|d" title="msg"></b></p>'], '', ''],
              [['title="msg"'], 'm', 'd'],
            ]);
          });

          it('should extract from attributes in translatable block', () => {
            expect(
                extract('<!-- i18n --><p><b i18n-title="m|d" title="msg"></b></p><!-- /i18n -->'))
                .toEqual([
                  [['title="msg"'], 'm', 'd'],
                  [['<p><b i18n-title="m|d" title="msg"></b></p>'], '', ''],
                ]);
          });

          it('should extract from attributes in translatable ICU', () => {
            expect(
                extract(
                    '<!-- i18n -->{count, plural, =0 {<p><b i18n-title="m|d" title="msg"></b></p>}}<!-- /i18n -->'))
                .toEqual([
                  [['title="msg"'], 'm', 'd'],
                  [['{count, plural, =0 {<p><b i18n-title="m|d" title="msg"></b></p>}}'], '', ''],
                ]);
          });

          it('should extract from attributes in non translatable ICU', () => {
            expect(extract('{count, plural, =0 {<p><b i18n-title="m|d" title="msg"></b></p>}}'))
                .toEqual([
                  [['title="msg"'], 'm', 'd'],
                ]);
          });

          it('should not create a message for empty attributes',
             () => { expect(extract('<div i18n-title="m|d" title></div>')).toEqual([]); });
        });

        describe('implicit tags', () => {
          it('should extract from implicit tags', () => {
            expect(extract('<b>bold</b><i>italic</i>', ['b'])).toEqual([
              [['bold'], '', ''],
            ]);
          });
        });

        describe('implicit attributes', () => {
          it('should extract implicit attributes', () => {
            expect(extract('<b title="bb">bold</b><i title="ii">italic</i>', [], {'b': ['title']}))
                .toEqual([
                  [['title="bb"'], '', ''],
                ]);
          });
        });

        describe('errors', () => {
          describe('elements', () => {
            it('should report nested translatable elements', () => {
              expect(extractErrors(`<p i18n><b i18n></b></p>`)).toEqual([
                [
                  'Could not mark an element as translatable inside a translatable section',
                  '<b i18n>'
                ],
              ]);
            });

            it('should report translatable elements in implicit elements', () => {
              expect(extractErrors(`<p><b i18n></b></p>`, ['p'])).toEqual([
                [
                  'Could not mark an element as translatable inside a translatable section',
                  '<b i18n>'
                ],
              ]);
            });

            it('should report translatable elements in translatable blocks', () => {
              expect(extractErrors(`<!-- i18n --><b i18n></b><!-- /i18n -->`)).toEqual([
                [
                  'Could not mark an element as translatable inside a translatable section',
                  '<b i18n>'
                ],
              ]);
            });
          });

          describe('blocks', () => {
            it('should report nested blocks', () => {
              expect(extractErrors(`<!-- i18n --><!-- i18n --><!-- /i18n --><!-- /i18n -->`))
                  .toEqual([
                    ['Could not start a block inside a translatable section', '<!--'],
                    ['Trying to close an unopened block', '<!--'],
                  ]);

            });

            it('should report unclosed blocks', () => {
              expect(extractErrors(`<!-- i18n -->`)).toEqual([
                ['Unclosed block', '<!--'],
              ]);
            });

            it('should report translatable blocks in translatable elements', () => {
              expect(extractErrors(`<p i18n><!-- i18n --><!-- /i18n --></p>`)).toEqual([
                ['Could not start a block inside a translatable section', '<!--'],
                ['Trying to close an unopened block', '<!--'],
              ]);
            });

            it('should report translatable blocks in implicit elements', () => {
              expect(extractErrors(`<p><!-- i18n --><!-- /i18n --></p>`, ['p'])).toEqual([
                ['Could not start a block inside a translatable section', '<!--'],
                ['Trying to close an unopened block', '<!--'],
              ]);
            });

            it('should report when start and end of a block are not at the same level', () => {
              expect(extractErrors(`<!-- i18n --><p><!-- /i18n --></p>`)).toEqual([
                ['I18N blocks should not cross element boundaries', '<!--'],
                ['Unclosed block', '<p>'],
              ]);

              expect(extractErrors(`<p><!-- i18n --></p><!-- /i18n -->`)).toEqual([
                ['I18N blocks should not cross element boundaries', '<!--'],
                ['Unclosed block', '<!--'],
              ]);
            });
          });

          describe('implicit elements', () => {
            it('should report nested implicit elements', () => {
              expect(extractErrors(`<p><b></b></p>`, ['p', 'b'])).toEqual([
                ['Could not mark an element as translatable inside a translatable section', '<b>'],
              ]);
            });

            it('should report implicit element in translatable element', () => {
              expect(extractErrors(`<p i18n><b></b></p>`, ['b'])).toEqual([
                ['Could not mark an element as translatable inside a translatable section', '<b>'],
              ]);
            });

            it('should report implicit element in translatable blocks', () => {
              expect(extractErrors(`<!-- i18n --><b></b><!-- /i18n -->`, ['b'])).toEqual([
                ['Could not mark an element as translatable inside a translatable section', '<b>'],
              ]);
            });
          });
        });
      });
}