/*---------------------------------------------------------------------------------------------
 *  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 { getLanguageService } from '../src/languageservice/yamlLanguageService';
import { schemaRequestService, workspaceContext } from './utils/testHelper';
import { getLineOffsets } from '../src/languageservice/utils/arrUtils';
import assert = require('assert');

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

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

describe('Auto Completion Tests', () => {
  describe('yamlCompletion with asmdef', 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('Array of enum autocomplete without word on array symbol', done => {
        const content = 'optionalUnityReferences:\n  -';
        const completion = parseSetup(content, 29);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Array of enum autocomplete without word', done => {
        const content = 'optionalUnityReferences:\n  - ';
        const completion = parseSetup(content, 30);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Array of enum autocomplete with letter', done => {
        const content = 'optionalUnityReferences:\n  - T';
        const completion = parseSetup(content, 31);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Array of enum autocomplete with multiline text', done => {
        const content = 'optionalUnityReferences:\n  - T\n    e\n';
        const completion = parseSetup(content, 31);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
            // textEdit must be single line
            assert.equal(result.items[0].textEdit, undefined);
          })
          .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);
    }
    return languageService.doComplete(document, position, false);
  } else {
    //All the nodes are loaded
    position.character = position.character - 1;
    return languageService.doComplete(document, position, false);
  }
}