/**
 *
 * @param {any} str
 */
function log(str) {
    console.log(JSON.stringify(str, undefined, 4))
}

/**
 * convert object to string
 * @param {any} obj object
 */
function obj2str(obj) {
    if (Array.isArray(obj)) {
        return JSON.stringify(
            obj.map(function (idx) {
                return obj2str(idx)
            })
        )
    } else if (typeof obj === "object" && obj !== null) {
        var elements = Object.keys(obj)
            .sort()
            .map(function (key) {
                var val = obj2str(obj[key])
                if (val) {
                    return key + ":" + val
                }
            })

        var elementsCleaned = []
        for (var i = 0; i < elements.length; i++) {
            if (elements[i]) elementsCleaned.push(elements[i])
        }

        return "{" + elementsCleaned.join("|") + "}"
    }

    if (obj) return obj
}
var { LIGHTHOUSE_TOKEN } = require("../config")

/**
 * clear SSR cache
 * @returns {number}
 */
function clearSSRCache() {
    var info = context.db.deleteMany("ssr", {})
    context.response.header("X-SSR-Cleared", info.removed)
    return info.removed
}

function calculateAverageDynamically(dbObjs) {
    const sumObj = {}
    let count = 0

    dbObjs.forEach((obj) => {
        accumulate(obj, sumObj)
        count++
    })

    function accumulate(sourceObj, targetObj) {
        for (const key in sourceObj) {
            if (typeof sourceObj[key] === "number") {
                targetObj[key] = (targetObj[key] || 0) + sourceObj[key]
            } else if (typeof sourceObj[key] === "object" && sourceObj[key] !== null) {
                targetObj[key] = targetObj[key] || {}
                accumulate(sourceObj[key], targetObj[key])
            }
        }
    }

    function average(targetObj) {
        for (const key in targetObj) {
            if (typeof targetObj[key] === "number") {
                targetObj[key] = targetObj[key] / count
            } else if (typeof targetObj[key] === "object") {
                average(targetObj[key])
            }
        }
    }

    average(sumObj)
    return sumObj
}

function run(url) {
    const response = context.http
        .fetch(url, {
            timeout: 300,
            method: "GET",
            headers: {
                "Content-Type": "application/json",
            },
        })
        .body.json()
    // needs enough traffic to be collected
    const cruxMetrics = {
        "First Contentful Paint": response?.loadingExperience?.metrics?.FIRST_CONTENTFUL_PAINT_MS?.category,
        "First Input Delay": response?.loadingExperience?.metrics?.FIRST_INPUT_DELAY_MS?.category,
    }
    const lighthouse = response.lighthouseResult
    const lighthouseMetrics = {
        FCPS: lighthouse.audits["first-contentful-paint"].score * 100,
        FCPV: lighthouse.audits["first-contentful-paint"].numericValue / 1000,
        FMPS: lighthouse.audits["first-meaningful-paint"].score * 100,
        FMPV: lighthouse.audits["first-meaningful-paint"].numericValue / 1000,

        SIS: lighthouse.audits["speed-index"].score * 100,
        SIV: lighthouse.audits["speed-index"].numericValue / 1000,
        TTIS: lighthouse.audits["interactive"].score * 100,
        TTIV: lighthouse.audits["interactive"].numericValue / 1000,

        FPIDS: lighthouse.audits["max-potential-fid"].score * 100,
        FPIDV: lighthouse.audits["max-potential-fid"].numericValue / 1000,
    }

    let dbObject = {
        cruxMetrics,
        lighthouseMetrics,
        performance: Math.round(lighthouse.categories.performance.score * 100),
        accessibility: Math.round(lighthouse.categories.accessibility.score * 100),
        bestPractices: Math.round(lighthouse.categories["best-practices"].score * 100),
        seo: Math.round(lighthouse.categories.seo.score * 100),
    }
    return dbObject
}
function setUpQuery(subPath = "/") {
    const api = "https://www.googleapis.com/pagespeedonline/v5/runPagespeed"
    let params = `category=performance&category=accessibility&category=best-practices&category=seo`

    const parameters = {
        url: encodeURIComponent(`https://allkids-erfurt.de/${subPath}`),
        key: LIGHTHOUSE_TOKEN,
    }

    let query = `${api}?`
    for (let key in parameters) {
        query += `${key}=${parameters[key]}&`
    }
    query += params // Append other parameters without URL encoding
    return query
}

module.exports = {
    log,
    clearSSRCache,
    obj2str,
    run,
    setUpQuery,
    calculateAverageDynamically,
}