/*---------------------------------------------------------------------------------------------
 *  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/composer';
const languageSettings = {
  schemas: [],
  completion: true,
};
const fileMatch = ['*.yml', '*.yaml'];
languageSettings.schemas.push({ uri, fileMatch });
languageService.configure(languageSettings);

describe('Auto Completion Tests', () => {
  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)
    );
  }

  describe('yamlCompletion with composer', function() {
    describe('doComplete', function() {
      it('Array autocomplete without word', done => {
        const content = 'authors:\n  - ';
        const completion = parseSetup(content, 14);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Array autocomplete without word on array symbol', done => {
        const content = 'authors:\n  -';
        const completion = parseSetup(content, 13);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Array autocomplete without word on space before array symbol', done => {
        const content = 'authors:\n  - name: test\n  ';
        const completion = parseSetup(content, 24);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Array autocomplete with letter', done => {
        const content = 'authors:\n  - n';
        const completion = parseSetup(content, 14);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Array autocomplete without word (second item)', done => {
        const content = 'authors:\n  - name: test\n    ';
        const completion = parseSetup(content, 32);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Array autocomplete with letter (second item)', done => {
        const content = 'authors:\n  - name: test\n    e';
        const completion = parseSetup(content, 27);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocompletion after array', done => {
        const content = 'authors:\n  - name: test\n';
        const completion = parseSetup(content, 24);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocompletion after array with depth', done => {
        const content = 'archive:\n  exclude:\n  - test\n';
        const completion = parseSetup(content, 29);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocompletion after array with depth', done => {
        const content =
          'autoload:\n  classmap:\n  - test\n  exclude-from-classmap:\n  - test\n  ';
        const completion = parseSetup(content, 70);
        completion
          .then(function(result) {
            assert.notEqual(result.items.length, 0);
          })
          .then(done, done);
      });
    });

    describe('Failure tests', function() {
      it('Autocompletion has no results on value when they are not available', done => {
        const content = 'time: ';
        const completion = parseSetup(content, 6);
        completion
          .then(function(result) {
            assert.equal(result.items.length, 0);
          })
          .then(done, done);
      });

      it('Autocompletion has no results on value when they are not available (with depth)', done => {
        const content = 'archive:\n  exclude:\n    - test\n    ';
        const completion = parseSetup(content, 33);
        completion
          .then(function(result) {
            assert.equal(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);
  }
}