import { sharedMemory } from "./sharedMemory";
import { Stop, System } from "./generated/graphql";

const baseUrl = "https://passiogo.com/mapGetData.php";

async function updateStopAndOrderedStopDataForSystem(systemToConstruct: System) {
  const params = {
    getStops: "2",
  };

  const formDataJsonObject = {
    "s0": systemToConstruct.id,
    "sA": "1",
  }
  const formData = new FormData();
  formData.set("json", JSON.stringify(formDataJsonObject));

  const query = new URLSearchParams(params).toString();
  const response = await fetch(`${baseUrl}?${query}`, {
    method: "POST",
    body: formData,
  });
  const json = await response.json();

  if (typeof json.stops === "object") {
    const jsonStops = Object.values(json.stops);

    systemToConstruct.stops = jsonStops.map((jsonStop: any) => {
      return {
        id: jsonStop.id,
        name: jsonStop.name,
        coordinates: {
          latitude: jsonStop.latitude,
          longitude: jsonStop.longitude,
        },
        system: systemToConstruct,
        etas: [],
        orderedStops: [],
      }
    });
  }
}

async function updateSystemData() {
  // Construct the graph from the bottom up, so that
  // system data is populated with all necessary fields

  const params = {
    getSystems: "2",
  };
  const query = new URLSearchParams(params).toString();
  const response = await fetch(`${baseUrl}?${query}`);
  const json = await response.json()

  if (typeof json.all === "object") {
    sharedMemory.systems = await Promise.all(json.all.map(async (jsonSystem: any) => {
      const constructedSystem: System = {
        id: jsonSystem.id,
        name: jsonSystem.fullname,
        routes: [],
        stops: [],
        shuttles: [],
      };

      try {
        await updateStopAndOrderedStopDataForSystem(constructedSystem);
      } catch (e) {
        console.error(e);
      }

      return constructedSystem;
    }));
  }
}

async function fetchDataAndUpdateStore() {
  try {
    await updateSystemData();
  } catch (e) {
    console.error(e);
  }
}

async function runDataUpdateScheduler() {
  // while (true) {
  const timeoutInMilliseconds = 10000;
  await fetchDataAndUpdateStore();
  await new Promise((resolve) => setTimeout(resolve, timeoutInMilliseconds));
  // }
}

function startDataUpdater() {
  runDataUpdateScheduler();
}

export { startDataUpdater };