import * as vscode from 'vscode';

import { CommandEntry } from './commands';

export class CommandItem extends vscode.TreeItem {
  constructor(
    public readonly label: string,
    public readonly command: vscode.Command
  ) {
    super(label, vscode.TreeItemCollapsibleState.None);
  }
};

export default class CommandNodeProvider implements vscode.TreeDataProvider<CommandItem> {
  private items: CommandItem[] = [];

  public constructor(commands: CommandEntry[]) {
    // build and cache command items
    for (const c of commands) {
      let humanReadable = c.name.replace(/^mind-reader\./, ''); // strip extensions name
      // Convert camelCaseText to Title Case Text
      humanReadable = humanReadable.replace(/([A-Z])/g, ' $1');
      humanReadable = humanReadable.charAt(0).toUpperCase() + humanReadable.slice(1);

      this.items.push(new CommandItem(
        humanReadable,
        {
          title: humanReadable,
          command: c.name,
          tooltip: humanReadable
        }
      ));
    }
  }

  public getTreeItem(item: CommandItem): vscode.TreeItem {
    return item;
  }

  public async getChildren(): Promise<CommandItem[]> {
    return Promise.resolve(this.items);
  }
}