import {
  MergeStrategy,
  SchematicContext,
  Tree,
  VirtualTree
} from '@angular-devkit/schematics';
import { isObservable, of } from 'rxjs';
import { tap } from 'rxjs/operators';

import { getFileContent } from '../test';
import { Schema } from './schema';
import { updateWchtoolsOptions } from './update.wchtoolsoptions';

describe('update.wchtoolsoptions', () => {
  const context: SchematicContext = ({
    engine: null,
    debug: false,
    strategy: MergeStrategy.Default
  } as {}) as SchematicContext;

  it('create the missing file', () => {
    const pkg = {};

    const options: Schema = {
      url: 'http:/example.org'
    };

    const tree = new VirtualTree();
    tree.create('package.json', JSON.stringify(pkg));

    const res = updateWchtoolsOptions(options)(tree, context);

    const rxRes = isObservable(res) ? res : of(res as Tree);

    return rxRes
      .pipe(
        tap(tree => {
          // verify the url
          expect(tree).toBeTruthy();
          if (tree) {
            // check that we have the file
            const data = JSON.parse(
              getFileContent(tree, '/data/.wchtoolsoptions.json')
            );
            expect(data['x-ibm-dx-tenant-base-url']).toEqual(options.url);
          }
        })
      )
      .toPromise();
  });

  it('should migrate an existing options file', () => {
    const pkg = {
      config: {
        data: './data-test'
      }
    };

    const oldOps = {
      old: true,
      ['x-ibm-dx-tenant-base-url']: 'http://old.url'
    };

    const options: Schema = {
      url: 'http:/example.org'
    };

    const tree = new VirtualTree();
    tree.create('package.json', JSON.stringify(pkg));
    tree.create('/data-test/.wchtoolsoptions', JSON.stringify(oldOps));

    const res = updateWchtoolsOptions(options)(tree, context);

    const rxRes = isObservable(res) ? res : of(res as Tree);

    return rxRes
      .pipe(
        tap(tree => {
          // verify the url
          expect(tree).toBeTruthy();
          if (tree) {
            // check that we have the file
            const data = JSON.parse(
              getFileContent(tree, '/data-test/.wchtoolsoptions.json')
            );
            expect(data['x-ibm-dx-tenant-base-url']).toEqual(options.url);
            // validate that the old file does not exist
            expect(tree.exists('/data-test/.wchtoolsoptions')).toBeFalsy();
            // check that the files has been migrated
            expect(data.old).toBeTruthy();
          }
        })
      )
      .toPromise();
  });

  it('should create a new options file', () => {
    const pkg = {
      config: {
        data: './data-test'
      }
    };

    const options: Schema = {
      url: 'http:/example.org'
    };

    const tree = new VirtualTree();
    tree.create('package.json', JSON.stringify(pkg));

    const res = updateWchtoolsOptions(options)(tree, context);

    const rxRes = isObservable(res) ? res : of(res as Tree);

    return rxRes
      .pipe(
        tap(tree => {
          // verify the url
          expect(tree).toBeTruthy();
          if (tree) {
            const data = JSON.parse(
              getFileContent(tree, '/data-test/.wchtoolsoptions.json')
            );
            expect(data['x-ibm-dx-tenant-base-url']).toEqual(options.url);
          }
        })
      )
      .toPromise();
  });
});