import { inject } from "aurelia-dependency-injection";
import { Project, ProjectItem, CLIOptions, UI } from "aurelia-cli";

@inject(Project, CLIOptions, UI)
export default class GeneratorGenerator {
  constructor(project, options, ui) {
    this.project = project;
    this.options = options;
    this.ui = ui;
  }

  async execute() {
    const name = await this.ui.ensureAnswer(this.options.args[0], "What would you like to call the generator?");

    let fileName = this.project.makeFileName(name);
    let className = this.project.makeClassName(name);

    this.project.generators.add(ProjectItem.text(`${fileName}.js`, this.generateSource(className)));

    await this.project.commitChanges();
    await this.ui.log(`Created ${fileName}.`);
  }

  generateSource(className) {
    return `import {inject} from 'aurelia-dependency-injection';
import {Project, ProjectItem, CLIOptions, UI} from 'aurelia-cli';

@inject(Project, CLIOptions, UI)
export default class ${className}Generator {
  constructor(project, options, ui) {
    this.project = project;
    this.options = options;
    this.ui = ui;
  }

  execute() {
    return this.ui
      .ensureAnswer(this.options.args[0], 'What would you like to call the new item?')
      .then(name => {
        let fileName = this.project.makeFileName(name);
        let className = this.project.makeClassName(name);

        this.project.elements.add(
          ProjectItem.text(\`\${fileName}.js\`, this.generateSource(className))
        );

        return this.project.commitChanges()
          .then(() => this.ui.log(\`Created \${fileName}.\`));
      });
  }

  generateSource(className) {
return \`import {bindable} from 'aurelia-framework';

export class \${className} {
  @bindable value;

  valueChanged(newValue, oldValue) {
    //
  }
}
\`
  }
}
`;
  }
}
