const express = require('express')

const rWeather = express.Router()

const { getWeather } = require("../WeatherApi/weather.js")

const { db } = require("../dbApi/index.js")

//send today weather

rWeather.get("/:location/:contryCode/:stateCode", async (req, res) => {

//prendo il parametro inviato

let location = (req.params.location).toLowerCase()

let contryCode = req.params.contryCode.toUpperCase()

let stateCode = req.params.stateCode.toUpperCase()

console.log(location, contryCode, stateCode)

//controllo che il parametro non sia null

if (location == undefined) {

res.status(500).send("Il campo Location non dev'essere null")

return

}

//definisco le variabili con dei valori di default

let result = undefined

let date = (new Date().toISOString()).substring(0, 10)

//recupero di dati dal db

await db.connect()

try {

result = await db.findWeather(location, contryCode, stateCode, date)

} catch (error) {

console.log(error)

}

console.log("result DB " + result.length)

//controllo se i dati che ho ricercato sono stati trovati

if (result) {

res.status(200).send(result)

return true

}

//recupero i dati dal API

result = await getWeather(location, contryCode, stateCode, undefined, new Date().toISOString().substring(0, 10))

if (!result) {

res.status(500).send("Location not found")

return

}

//li salvo nel db

await db.addPrevisions(location, contryCode, stateCode, result)

try {

result = await db.findWeather(location, contryCode, stateCode, date)

} catch (error) {

console.log(error)

}

//li invio dall'utente

res.status(200).send(result)

})

rWeather.get("/:location/:countryCode/:stateCode/:dateStart/:dateEnd", async (req, res) => {

let location = req.params.location.toLowerCase()

let countryCode = req.params.countryCode.toUpperCase()

let stateCode = req.params.stateCode.toUpperCase()

let dateS = req.params.dateStart

let dateE = req.params.dateEnd

let alphaTime = (new Date(dateE)).getTime() - (new Date(dateS)).getTime()

alphaTime = Math.floor(alphaTime / (1000 * 60 * 60 * 24))

let result = undefined

await db.connect()

result = await db.findWeather(location, countryCode, stateCode, dateE, dateS)

if (result) {

let date = controlResult(result, [dateS, dateE])

if (date) {

while (date.length > 0) {

console.log(date[0])

result = await getWeather(location, countryCode, stateCode, undefined, date[0])

await db.addPrevisions(location, countryCode, stateCode, result)

date.shift()

}

result = await db.findWeather(location, countryCode, stateCode, dateE, dateS)

res.status(200).send(result)

return

} else {

res.status(200).send(result)

return

}

}

result = await getWeather(location, countryCode, stateCode, dateS, dateE)

await db.addPrevisions(location, countryCode, stateCode, result)

result = await db.findWeather(location, countryCode, stateCode, dateE, dateS)

res.status(200).send(result)

})

function controlResult(object, range) {

let startD = parseInt(range[0].substring(8, 10))

let endD = parseInt(range[1].substring(8, 10))

let allD = []

let toReserch = []

// problema se due mesi differenti da errore ovviamente

for (let i = startD; i <= endD; i++) {

allD.push(i)

}

object.forEach(element => {

let date = parseInt(element["date"].substring(3, 5))

if (allD.includes(date)) {

const index = allD.indexOf(date);

if (index > -1) { // only splice array when item is found

allD.splice(index, 1); // 2nd parameter means remove one item only

}

}

})

//questo crea un bellissimo problema (se sono di due mesi diversi non funzia bene perchè non va)

allD.forEach(element => {

toReserch.push(range[0].substring(0, 8) + (element.toString().length < 2 ? "0" + element : element))

})

return toReserch.length < 1 ? undefined : toReserch

}

module.exports = { rWeather }