import { Rule } from "../rule";
import { Context } from "../context";
import { Options } from "../options";
import { Client } from "../client";

export default class ResourceGroupTag extends Rule {
  private readonly tagName: string;
  private readonly tagPattern: string;

  constructor(context: Context, options: Options) {
    super(context, options);
    this.tagName = options.string("name");
    this.tagPattern = options.string("pattern");
  }

  async run(client: Client): Promise<void> {
    const pattern = new RegExp(`^${this.tagPattern}$`);

    const resourceGroups = await client.listResourceGroups();
    for (const resourceGroup of resourceGroups) {
      const tagValue = resourceGroup.tags
        ? resourceGroup.tags[this.tagName]
        : null;
      if (tagValue == null) {
        this.report(resourceGroup, "resourceGroupTagMissing", {
          name: resourceGroup.name,
          tag: this.tagName
        });
      } else if (!tagValue.match(pattern)) {
        this.report(resourceGroup, "resourceGroupTagDoesNotMatchPattern", {
          name: resourceGroup.name,
          tag: this.tagName,
          value: tagValue,
          pattern: pattern.toString()
        });
      }
    }
  }
}