import { ChoiceRequest, CampaignGroup } from "../../models";
import { getDeviceOS } from "../../utils/RequestUtils";
import { AbstractStep } from "../abstractStep";
import { StepResult } from "../stepResult";

class ProgrammaticIVTStep extends AbstractStep {
  constructor() {
    super("programmatic_ivt", ["with_ip", "with_ua"]);
    this.autoPassCampaignGroup = CampaignGroup.Managed | CampaignGroup.Fallback;
  }

  async run(request: ChoiceRequest): Promise<StepResult> {
    const result = new StepResult();
    const isIVT = ProgrammaticIVTStep.isIVT(request, result);

    if (!isIVT) {
      result.passCampaigns(...request.campaigns);
    }

    return result;
  }

  private static isIVT(request: ChoiceRequest, result: StepResult): boolean {
    let ivt = false;
    request.device ??= {};
    const device = request.device;

    if (
      (!device.ip || device.ip === "0.0.0.0" || device.ip === "255.255.255.255") &&
      (!device.ipv6 || device.ipv6 === "" || device.ipv6 === "::1")
    ) {
      result.setMetricLabel("with_ip", false);
      ivt = true;
    } else if (!device.ua || device.ua === "") {
      result.setMetricLabel("with_ip", true);
      result.setMetricLabel("with_ua", false);
      if (
        getDeviceOS(request.device) === "android" &&
        device.os_version &&
        device.os_version !== "" &&
        device.name &&
        device.name !== ""
      ) {
        // fallback
        device.ua = `Mozilla/5.0 (Linux; Android ${device.os_version}; ${device.name} Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.64 Mobile Safari/537.36`;
      } else {
        ivt = true;
      }
    } else {
      result.setMetricLabel("with_ip", true);
      result.setMetricLabel("with_ua", true);
    }
    return ivt;
  }
}

export default ProgrammaticIVTStep;