/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Red Hat. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
import { TextDocument } from 'vscode-languageserver';
import { parse as parseYAML } from '../src/languageservice/parser/yamlParser';
import { getLineOffsets } from '../src/languageservice/utils/arrUtils';
import { getLanguageService } from '../src/languageservice/yamlLanguageService';
import { schemaRequestService, workspaceContext } from './testHelper';
const assert = require('assert');

const languageService = getLanguageService(
  schemaRequestService,
  workspaceContext,
  []
);

const uri = 'http://json.schemastore.org/bowerrc';
const languageSettings = {
  schemas: [],
  completion: true,
};
const fileMatch = ['*.yml', '*.yaml'];
languageSettings.schemas.push({ uri, fileMatch });
languageService.configure(languageSettings);

describe('Auto Completion Tests', () => {
  describe('yamlCompletion with bowerrc', function() {
    describe('doComplete', function() {
      function setup(content: string) {
        return TextDocument.create(
          'file://~/Desktop/vscode-k8s/test.yaml',
          'yaml',
          0,
          content
        );
      }

      function parseSetup(content: string, position) {
        const testTextDocument = setup(content);
        return completionHelper(
          testTextDocument,
          testTextDocument.positionAt(position)
        );
      }

      it('Autocomplete on root node without word', done => {
        const content = '';
        const completion = parseSetup(content, 0);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocomplete on root node with word', done => {
        const content = 'analyt';
        const completion = parseSetup(content, 6);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocomplete on default value (without value content)', done => {
        const content = 'directory: ';
        const completion = parseSetup(content, 12);
        completion
          .then(function(result) {
            expect(result.items.length).toEqual(1);
          })
          .then(done, done);
      });

      it('Autocomplete on default value (with value content)', done => {
        const content = 'directory: bow';
        const completion = parseSetup(content, 15);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocomplete on boolean value (without value content)', done => {
        const content = 'analytics: ';
        const completion = parseSetup(content, 11);
        completion
          .then(function(result) {
            expect(result.items.length).toEqual(2);
          })
          .then(done, done);
      });

      it('Autocomplete on boolean value (with value content)', done => {
        const content = 'analytics: fal';
        const completion = parseSetup(content, 11);
        completion
          .then(function(result) {
            assert.equal(result.items.length, 2);
          })
          .then(done, done);
      });

      it('Autocomplete on number value (without value content)', done => {
        const content = 'timeout: ';
        const completion = parseSetup(content, 9);
        completion
          .then(function(result) {
            expect(result.items.length).toEqual(1);
          })
          .then(done, done);
      });

      it('Autocomplete on number value (with value content)', done => {
        const content = 'timeout: 6';
        const completion = parseSetup(content, 10);
        completion
          .then(function(result) {
            assert.equal(result.items.length, 1);
          })
          .then(done, done);
      });

      it('Autocomplete key in middle of file', done => {
        const content = 'scripts:\n  post';
        const completion = parseSetup(content, 11);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocomplete key in middle of file 2', done => {
        const content = 'scripts:\n  postinstall: /test\n  preinsta';
        const completion = parseSetup(content, 31);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocomplete does not happen right after :', done => {
        const content = 'analytics:';
        const completion = parseSetup(content, 9);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocomplete does not happen right after : under an object', done => {
        const content = 'scripts:\n  postinstall:';
        const completion = parseSetup(content, 21);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocomplete on multi yaml documents in a single file on root', done => {
        const content = `---\nanalytics: true\n...\n---\n...`;
        const completion = parseSetup(content, 28);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocomplete on multi yaml documents in a single file on scalar', done => {
        const content = `---\nanalytics: true\n...\n---\njson: \n...`;
        const completion = parseSetup(content, 34);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });
    });
  });
});

function is_EOL(c) {
  return c === 0x0a /* LF */ || c === 0x0d /* CR */;
}

function completionHelper(document: TextDocument, textDocumentPosition) {
  // Get the string we are looking at via a substring
  const linePos = textDocumentPosition.line;
  const position = textDocumentPosition;
  const lineOffset = getLineOffsets(document.getText());
  const start = lineOffset[linePos]; // Start of where the autocompletion is happening
  let end = 0; // End of where the autocompletion is happening
  if (lineOffset[linePos + 1]) {
    end = lineOffset[linePos + 1];
  } else {
    end = document.getText().length;
  }

  while (end - 1 >= 0 && is_EOL(document.getText().charCodeAt(end - 1))) {
    end--;
  }

  const textLine = document.getText().substring(start, end);

  // Check if the string we are looking at is a node
  if (textLine.indexOf(':') === -1) {
    // We need to add the ":" to load the nodes

    let newText = '';

    // This is for the empty line case
    const trimmedText = textLine.trim();
    if (
      trimmedText.length === 0 ||
      (trimmedText.length === 1 && trimmedText[0] === '-')
    ) {
      // Add a temp node that is in the document but we don't use at all.
      newText =
        document.getText().substring(0, start + textLine.length) +
        (trimmedText[0] === '-' && !textLine.endsWith(' ') ? ' ' : '') +
        'holder:\r\n' +
        document
          .getText()
          .substr(lineOffset[linePos + 1] || document.getText().length);
      // For when missing semi colon case
    } else {
      // Add a semicolon to the end of the current line so we can validate the node
      newText =
        document.getText().substring(0, start + textLine.length) +
        ':\r\n' +
        document
          .getText()
          .substr(lineOffset[linePos + 1] || document.getText().length);
    }
    const jsonDocument = parseYAML(newText);
    return languageService.doComplete(document, position, jsonDocument);
  } else {
    // All the nodes are loaded
    position.character = position.character - 1;
    const jsonDocument = parseYAML(document.getText());
    return languageService.doComplete(document, position, jsonDocument);
  }
}