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

@inject(Project, CLIOptions, UI)
export default class ElementGenerator {
  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 custom element?");

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

    this.project.elements.add(
      ProjectItem.text(`${fileName}.js`, this.generateJSSource(className)),
      ProjectItem.text(`${fileName}.html`, this.generateHTMLSource(className))
    );

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

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

export class ${className} {
  @bindable value;

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

  generateHTMLSource(className) {
    return `<template>
  <h1>\${value}</h1>
</template>
`;
  }
}
