export const getBostonAreaWeather = functions.https.onRequest(async (request, response) => {
    try {
        const areaSnapshot = await admin.firestore().doc("areas/greater-boston").get()
        const cities = areaSnapshot.data().cities
        const promises = []
        cities.forEach(city => {
            const p = admin.firestore().doc(`cities-weather/${city}`).get()
            promises.push(p)
        })

        const snapshots = await Promise.all(promises)

        const results = []
        snapshots.forEach(snap => {
            const data = snap.data()
            data.city = snap.id
            results.push(data)
        })

        response.send(results)
    }
    catch (error) {
        console.error(error)
        response.status(500).send(error)
    }
})