Reminders that get confirmed, not just sent.

interface Visit {
  visitId: string;
  phone: string;
  time: string;
  first: boolean;
}
interface Day { clinic: string; sendAtUtc: string; visits: Visit[] }

export class HealthLoop extends Workflow {
  async run(event: HealthEvent<Day>, step: HealthStep) {
    const { clinic, sendAtUtc, visits } = event.body;

    await step.do("Queue reminders", ({ ctx }) =>
      ctx.SMS.send({
        messages: visits.map((v) => ({
          destination: v.phone,
          content: `Reminder: your visit at ${clinic} is tomorrow, ${v.time}.`,
        })),
        options: { startDeliveryUtc: sendAtUtc, checkOptOuts: true },
      }),
    );

    for (const v of visits.filter((v) => v.first)) {
      const { sessionId } = await step.do(`Confirm ${v.visitId}`, ({ ctx }) =>
        ctx.startVoice({ loopId: "visit-confirmation", to: v.phone, body: { clinic, time: v.time } }),
      );
      const call = await step.waitForVoiceComplete({
        sessionId,
        timeout: "30 minutes",
      });

      await step.do(`Update ${v.visitId}`, async () => {
        await fetch(`${this.env.BOOKING_API}/visits/${v.visitId}/notes`, {
          method: "POST",
          body: JSON.stringify({ confirmationCall: call.summary }),
        });
      });
    }
  }
}