/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Red Hat. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
import {
  IPCMessageReader,
  IPCMessageWriter,
  createConnection,
  IConnection,
  TextDocumentSyncKind,
  TextDocument,
  InitializeResult,
  RequestType,
} from 'vscode-languageserver';
import { xhr, XHRResponse, getErrorStatusDescription } from 'request-light';
import {
  getLanguageService,
  LanguageSettings,
} from '../../src/languageservice/yamlLanguageService';
import Strings = require('../../src/languageservice/utils/strings');
import { URI } from 'vscode-uri';
import { getLanguageService as getJSONLanguageService } from 'vscode-json-languageservice';
import * as URL from 'url';
import fs = require('fs');
import path = require('path');

namespace VSCodeContentRequest {
  export const type: RequestType<{}, {}, {}, {}> = new RequestType(
    'vscode/content'
  );
}

// Create a connection for the server.
let connection: IConnection = null;
if (process.argv.indexOf('--stdio') === -1) {
  connection = createConnection(
    new IPCMessageReader(process),
    new IPCMessageWriter(process)
  );
} else {
  connection = createConnection();
}

connection.onInitialize(
  (): InitializeResult => ({
    capabilities: {
      // Tell the client that the server works in FULL text document sync mode
      textDocumentSync: TextDocumentSyncKind.Full,
      // Tell the client that the server support code complete
      completionProvider: {
        resolveProvider: false,
      },
    },
  })
);

export let workspaceContext = {
  resolveRelativePath: (relativePath: string, resource: string) =>
    URL.resolve(resource, relativePath),
};

export let schemaRequestService = (uri: string): Thenable<string> => {
  if (Strings.startsWith(uri, 'file://')) {
    const fsPath = URI.parse(uri).fsPath;
    return new Promise<string>((c, e) => {
      fs.readFile(fsPath, 'UTF-8', (err, result) => {
        err ? e('') : c(result.toString());
      });
    });
  } else if (Strings.startsWith(uri, 'vscode://')) {
    return connection.sendRequest(VSCodeContentRequest.type, uri).then(
      responseText => responseText,
      error => error.message
    );
  }
  return xhr({ url: uri, followRedirects: 5 }).then(
    response => response.responseText,
    (error: XHRResponse) =>
      Promise.reject(
        error.responseText ||
          getErrorStatusDescription(error.status) ||
          error.toString()
      )
  );
};

export function toFsPath(str): string {
  if (typeof str !== 'string') {
    throw new TypeError(`Expected a string, got ${typeof str}`);
  }

  let pathName;
  pathName = path.resolve(str);
  pathName = pathName.replace(/\\/g, '/');
  // Windows drive letter must be prefixed with a slash
  if (pathName[0] !== '/') {
    pathName = `/${pathName}`;
  }
  return encodeURI(`file://${pathName}`).replace(/[?#]/g, encodeURIComponent);
}

export function configureLanguageService(languageSettings: LanguageSettings) {
  const languageService = getLanguageService(
    schemaRequestService,
    workspaceContext,
    [],
    null
  );

  languageService.configure(languageSettings);
  return languageService;
}

export function createJSONLanguageService() {
  return getJSONLanguageService({
    schemaRequestService,
    workspaceContext,
  });
}

export function setupTextDocument(content: string) {
  return TextDocument.create(TEST_URI, 'yaml', 0, content);
}

export const TEST_URI = 'file://~/Desktop/vscode-k8s/test.yaml';