const FORMAT = {
    hourly: {
        temperature: {
            type: 'number',
            unit: '°C',
        },
        precipitationProbability: {
            type: 'number',
            unit: '%',
        },
        // weatherCode: {
        //     type: 'number',
        //     unit: 'Aeronautica Militare Weather Icons',
        // },
    },
    daily: {
        minimumTemperature: {
            type: 'number',
            unit: '°C',
        },
        maximumTemperature: {
            type: 'number',
            unit: '°C',
        },
        // weatherCode: {
        //     type: 'number',
        //     unit: 'Aeronautica Militare Weather Icons',
        // },
    },
}

const range = (start, end) => {
    /// returns [start .. (end-1)]
    return [...Array(end - start).keys()].map(x => x + start)
}

const parseTemp = el => {
    // return el.textContent
    return parseFloat(el.textContent)
}
const parsePrecProb = el => {
    const text = el.textContent.trim()
    return parseFloat(text)
    return text
    if (text === 'assenti') return 0
    if (text === 'deboli') return 0.05

    try {
        //TODO not 100% sure that this would work as it was never tested
    } catch (error) {
        console.log(error)
        return text
    }
}

export default async browser => {
    const page = await browser.newPage()
    await page.goto('https://www.meteoam.it/it/meteo-citta/pisa')

    const meteogramInfoContainer = await page
        .locator('.meteogram-info-container')
        .waitHandle()

    const startTime = new Date().getHours() + 1
    const endTime = 24

    const scrapeColumn = async i => {
        const column = await meteogramInfoContainer.$(
            `#weather_info_container_${i}`,
        )

        const tempDiv = await column.$('.weather-info-temperature')
        const precProbDiv = await column.$('.weather-rain-probability')

        const temperature = await tempDiv.evaluate(parseTemp)
        const precipitationProbability =
            await precProbDiv.evaluate(parsePrecProb)

        return { temperature, precipitationProbability }
    }

    const scrapeBlock = async i => {
        const block = await meteogramInfoContainer.$(
            `.swiper-slide[aria-label="${i + 1} / 5"]`,
        )

        const tempMaxDiv = await block.$('.meteogram-info-temp-max')
        const tempMinDiv = await block.$('.meteogram-info-temp-min')

        const maximumTemperature = await tempMaxDiv.evaluate(parseTemp)
        const minimumTemperature = await tempMinDiv.evaluate(parseTemp)

        return { minimumTemperature, maximumTemperature }
    }

    const scrapeToday = async () => {
        let today = {}
        const indices = range(startTime, endTime)
        const results = await Promise.all(indices.map(scrapeColumn))

        for (let i = startTime; i < endTime; i++) {
            today[i] = results[i - startTime]
        }

        return today
    }

    const scrapeTomorrow = async () => {
        let tomorrow = {}
        const indices = range(24 - startTime, 48 - startTime)
        const results = await Promise.all(indices.map(scrapeColumn))

        for (let i = 0; i < 24; i++) {
            tomorrow[i] = results[i]
        }

        return tomorrow
    }

    const scrapeDayAfterTomorrow = async () => {
        let dayAfterTomorrow = {}
        const indices = range(48 - startTime, 72 - startTime)
        const results = await Promise.all(indices.map(scrapeColumn))

        for (let i = 0; i < 24; i++) {
            dayAfterTomorrow[i] = results[i]
        }

        return dayAfterTomorrow
    }

    const scrapeWeek = async () => {
        let week = {}
        const indices = range(0, 5)
        const results = await Promise.all(indices.map(scrapeBlock))

        for (let i = 0; i < 5; i++) {
            week[i] = results[i]
        }

        return week
    }

    const [today, tomorrow, dayAfterTomorrow, week] = await Promise.all([
        scrapeToday(),
        scrapeTomorrow(),
        scrapeDayAfterTomorrow(),
        scrapeWeek(),
    ])

    await page.close()

    return {
        format: FORMAT,
        today,
        tomorrow,
        dayAfterTomorrow,
        week,
    }
}