// ==UserScript==
// @name         Wayfarer Exporter
// @version      0.9
// @description  Export nominations data from Wayfarer to IITC in Wayfarer Planner
// @namespace    https://gitlab.com/NvlblNm/wayfarer/
// @downloadURL  https://gitlab.com/NvlblNm/wayfarer/raw/master/wayfarer-exporter.user.js
// @homepageURL  https://gitlab.com/NvlblNm/wayfarer/
// @match        https://wayfarer.nianticlabs.com/*
// ==/UserScript==

/* eslint-env es6 */
/* eslint no-var: "error" */

function init() {
    // const w = typeof unsafeWindow === 'undefined' ? window : unsafeWindow;
    let tryNumber = 15

    // let nominationController;

    // queue of updates to send
    const pendingUpdates = []
    // keep track of how many request are being sent at the moment
    let sendingUpdates = 0
    // limit to avoid errors with Google
    const maxSendingUpdates = 8
    // counters for the log
    let totalUpdates = 0
    let sentUpdates = 0

    // logger containers
    let updateLog
    let logger
    let msgLog

        /**
         * Overwrite the open method of the XMLHttpRequest.prototype to intercept the server calls
         */
    ;(function (open) {
        XMLHttpRequest.prototype.open = function (method, url) {
            if (url === '/api/v1/vault/manage') {
                if (method === 'GET') {
                    this.addEventListener('load', parseNominations, false)
                }
            }
            open.apply(this, arguments)
        }
    })(XMLHttpRequest.prototype.open)

    addConfigurationButton()

    let sentNominations
    function parseNominations(e) {
        try {
            const response = this.response
            const json = JSON.parse(response)
            sentNominations = json && json.result && json.result.nominations
            if (!sentNominations) {
                logMessage('Failed to parse nominations from Wayfarer')
                return
            }
            analyzeCandidates()
        } catch (e) {
            console.log(e) // eslint-disable-line no-console
        }
    }

    let currentCandidates
    function analyzeCandidates(result) {
        if (!sentNominations) {
            setTimeout(analyzeCandidates, 200)
            return
        }

        getAllCandidates().then(function (candidates) {
            if (!candidates) {
                return
            }

            currentCandidates = candidates
            logMessage(`Analyzing ${sentNominations.length} nominations.`)
            let modifiedCandidates = false
            sentNominations.forEach((nomination) => {
                if (checkNomination(nomination)) {
                    modifiedCandidates = true
                }
            })
            if (modifiedCandidates) {
                localStorage['wayfarerexporter-candidates'] =
                    JSON.stringify(currentCandidates)
            } else {
                logMessage('No modifications detected on the nominations.')
                logMessage('Closing in 5 secs.')
                setTimeout(removeLogger, 5 * 1000)
            }
        })
    }

    /*
        returns true if it has modified the currentCandidates object and we must save it to localStorage after the loop ends
    */
    function checkNomination(nomination) {
        // console.log(nomination);
        const id = nomination.id
        // if we're already tracking it...
        const existingCandidate = currentCandidates[id]

        if (existingCandidate) {
            if (nomination.status === 'ACCEPTED') {
                // Ok, we don't have to track it any longer.
                logMessage(`Approved candidate ${nomination.title}`)
                deleteCandidate(nomination)
                delete currentCandidates[id]
                return true
            }
            if (nomination.status === 'REJECTED') {
                rejectCandidate(nomination, existingCandidate)
                // can be appealed, so keeping
                updateLocalCandidate(id, nomination)
                return true
            }
            if (nomination.status === 'DUPLICATE') {
                rejectCandidate(nomination, existingCandidate)
                delete currentCandidates[id]
                return true
            }
            if (nomination.status === 'WITHDRAWN') {
                rejectCandidate(nomination, existingCandidate)
                delete currentCandidates[id]
                return true
            }
            if (nomination.status === 'APPEALED') {
                updateLocalCandidate(id, nomination)
                appealCandidate(nomination, existingCandidate)
                return true
            }
            // catches following changes: held -> nominated, nominated -> held, held -> nominated -> voting
            if (
                statusConvertor(nomination.status) !== existingCandidate.status
            ) {
                updateLocalCandidate(id, nomination)
                updateCandidate(nomination, 'status')
                return true
            }

            // check for title and description updates only
            if (
                nomination.title !== existingCandidate.title ||
                nomination.description !== existingCandidate.description
            ) {
                currentCandidates[id].title = nomination.title
                currentCandidates[id].description = nomination.description
                updateCandidate(nomination, 'title or description')
                return true
            }

            return false
        }

        if (
            nomination.status === 'NOMINATED' ||
            nomination.status === 'VOTING' ||
            nomination.status === 'HELD' ||
            nomination.status === 'APPEALED' ||
            nomination.status === 'NIANTIC_REVIEW'
        ) {
            /*
            Try to find nominations added manually in IITC:
            same name in the same level 17 cell
            */
            const cell17 = S2.S2Cell.FromLatLng(nomination, 17)
            const cell17id = cell17.toString()
            Object.keys(currentCandidates).forEach((idx) => {
                const candidate = currentCandidates[idx]
                // if it finds a candidate in the same level 17 cell and less than 20 meters away, handle it as the nomination for this
                if (
                    candidate.cell17id === cell17id &&
                    getDistance(candidate, nomination) < 20
                ) {
                    // if we find such candidate, remove it because we're gonna add now the new one with a new id
                    logMessage(`Found manual candidate for ${candidate.title}`)
                    deleteCandidate({ id: idx })
                }
            })
            addCandidate(nomination)
            currentCandidates[nomination.id] = {
                cell17id: S2.S2Cell.FromLatLng(nomination, 17).toString(),
                title: nomination.title,
                description: nomination.description,
                lat: nomination.lat,
                lng: nomination.lng,
                status: statusConvertor(nomination.status)
            }
            return true
        }
        return false
    }

    // https://stackoverflow.com/a/1502821/250294
    function getDistance(p1, p2) {
        const rad = function (x) {
            return (x * Math.PI) / 180
        }

        const R = 6378137 // Earth’s mean radius in meter
        const dLat = rad(p2.lat - p1.lat)
        const dLong = rad(p2.lng - p1.lng)
        const a =
            Math.sin(dLat / 2) * Math.sin(dLat / 2) +
            Math.cos(rad(p1.lat)) *
                Math.cos(rad(p2.lat)) *
                Math.sin(dLong / 2) *
                Math.sin(dLong / 2)
        const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a))
        return R * c // returns the distance in meter
    }

    function statusConvertor(status) {
        if (status === 'HELD') {
            return 'held'
        }
        if (status === 'NOMINATED') {
            return 'submitted'
        }
        if (status === 'VOTING') {
            return 'voting'
        }
        if (
            status === 'REJECTED' ||
            status === 'DUPLICATE' ||
            status === 'WITHDRAWN'
        ) {
            return 'rejected'
        }
        if (status === 'APPEALED') {
            return 'appealed'
        }

        return status
    }

    function updateLocalCandidate(id, nomination) {
        currentCandidates[id].status = statusConvertor(nomination.status)
        currentCandidates[id].title = nomination.title
        currentCandidates[id].description = nomination.description
    }

    function addCandidate(nomination) {
        logMessage(`New candidate ${nomination.title}`)
        console.log('Tracking new nomination', nomination)
        updateStatus(nomination, statusConvertor(nomination.status))
    }

    function updateCandidate(nomination, change) {
        logMessage(`Updated candidate ${nomination.title} - changed ${change}`)
        console.log('Updated existing nomination', nomination)
        updateStatus(nomination, statusConvertor(nomination.status))
    }

    function deleteCandidate(nomination) {
        console.log('Deleting nomination', nomination)
        updateStatus(nomination, 'delete')
    }

    function rejectCandidate(nomination, existingCandidate) {
        if (existingCandidate.status === 'rejected') {
            return
        }

        logMessage(`Rejected nomination ${nomination.title}`)
        console.log('Rejected nomination', nomination)
        updateStatus(nomination, 'rejected')
    }

    function appealCandidate(nomination, existingCandidate) {
        if (existingCandidate.status === 'appealed') {
            return
        }

        logMessage(`Appealed nomination ${nomination.title}`)
        console.log('Appealed nomination', nomination)
        updateStatus(nomination, statusConvertor(nomination.status))
    }

    function updateStatus(nomination, newStatus) {
        const formData = new FormData()
        // if there's an error, let's retry 3 times. This is a custom property for us.
        formData.retries = 3

        formData.append('status', newStatus)
        formData.append('id', nomination.id)
        formData.append('lat', nomination.lat)
        formData.append('lng', nomination.lng)
        formData.append('title', nomination.title)
        formData.append('description', nomination.description)
        formData.append('submitteddate', nomination.day)
        formData.append('candidateimageurl', nomination.imageUrl)
        getName()
            .then((name) => {
                formData.append('nickname', name)
            })
            .catch((error) => {
                console.log('Catched load name error', error)
                formData.append('nickname', 'wayfarer')
            })
            .finally(() => {
                pendingUpdates.push(formData)
                totalUpdates++
                sendUpdate()
            })
    }

    let name
    let nameLoadingTriggered = false
    function getName() {
        return new Promise(function (resolve, reject) {
            if (!nameLoadingTriggered) {
                nameLoadingTriggered = true
                const url =
                    'https://wayfarer.nianticlabs.com/api/v1/vault/properties'
                fetch(url)
                    .then((response) => {
                        response.json().then((json) => {
                            name = json.result.socialProfile.name
                            logMessage(`Loaded name ${name}`)
                            resolve(name)
                        })
                    })
                    .catch((error) => {
                        console.log('Catched fetch error', error)
                        logMessage('Loading name failed. Using wayfarer')
                        name = 'wayfarer'
                        resolve(name)
                    })
            } else {
                const loop = () =>
                    name !== undefined ? resolve(name) : setTimeout(loop, 2000)
                loop()
            }
        })
    }

    // Send updates one by one to avoid errors from Google
    function sendUpdate() {
        updateProgressLog()

        if (sendingUpdates >= maxSendingUpdates) {
            return
        }
        if (pendingUpdates.length === 0) {
            return
        }

        sentUpdates++
        sendingUpdates++
        updateProgressLog()

        const formData = pendingUpdates.shift()
        const options = {
            method: 'POST',
            body: formData
        }

        fetch(getUrl(), options)
            .then((data) => {})
            .catch((error) => {
                console.log('Catched fetch error', error) // eslint-disable-line no-console
                logMessage(error)
                // one retry less
                formData.retries--
                if (formData.retries > 0) {
                    // if we should still retry, put it at the end of the queue
                    pendingUpdates.push(formData)
                }
            })
            .finally(() => {
                sendingUpdates--
                sendUpdate()
            })
    }

    function updateProgressLog() {
        const count = pendingUpdates.length

        if (count === 0) {
            updateLog.textContent = 'All updates sent.'
        } else {
            updateLog.textContent = `Sending ${sentUpdates}/${totalUpdates} updates to the spreadsheet.`
        }
    }

    function getUrl() {
        return localStorage['wayfarerexporter-url']
    }

    function addConfigurationButton() {
        const ref = document.querySelector('.sidebar-link[href$="nominations"]')

        if (!ref) {
            if (tryNumber === 0) {
                document
                    .querySelector('body')
                    .insertAdjacentHTML(
                        'afterBegin',
                        '<div class="alert alert-danger"><strong><span class="glyphicon glyphicon-remove"></span> Wayfarer Exporter initialization failed, refresh page</strong></div>'
                    )
                return
            }
            setTimeout(addConfigurationButton, 1000)
            tryNumber--
            return
        }

        addCss()

        const link = document.createElement('a')
        link.className =
            'mat-tooltip-trigger sidebar-link sidebar-wayfarerexporter'
        link.title = 'Configure Exporter'
        link.innerHTML =
            '<svg viewBox="0 0 24 24" class="sidebar-link__icon"><path d="M12,1L8,5H11V14H13V5H16M18,23H6C4.89,23 4,22.1 4,21V9A2,2 0 0,1 6,7H9V9H6V21H18V9H15V7H18A2,2 0 0,1 20,9V21A2,2 0 0,1 18,23Z" /></svg><span> Exporter</span>'
        // const ref = document.querySelector('.sidebar__item--nominations');

        ref.parentNode.insertBefore(link, ref.nextSibling)

        link.addEventListener('click', function (e) {
            e.preventDefault()

            const currentUrl = getUrl()
            const url = window.prompt(
                'Script Url for Wayfarer Planner',
                currentUrl
            )
            if (!url) {
                return
            }

            loadPlannerData(url).then(analyzeCandidates)
        })
    }

    function addCss() {
        const css = `
            .sidebar-wayfarerexporter svg {
                width: 24px;
                height: 24px;
                filter: none;
                fill: currentColor;
            }

            .wayfarer-exporter_log {
                background: #fff;
                box-shadow: 0 2px 5px 0 rgba(0, 0, 0, .16), 0 2px 10px 0 rgba(0, 0, 0, .12);
                display: flex;
                flex-direction: column;
                max-height: 100%;
                padding: 5px;
                position: absolute;
                top: 0;
                z-index: 2;
            }
            .wayfarer-exporter_log h3 {
                margin-right: 1em;
                margin-top: 0;
            }
            .wayfarer-exporter_closelog    {
                cursor: pointer;
                position: absolute;
                right: 0;
            }
            .wayfarer-exporter_log-wrapper {
                overflow: auto;
            }
            `
        const style = document.createElement('style')
        style.type = 'text/css'
        style.innerHTML = css
        document.querySelector('head').appendChild(style)
    }

    function getAllCandidates() {
        const promesa = new Promise(function (resolve, reject) {
            const storedData = localStorage['wayfarerexporter-candidates']
            const lastUpdate = localStorage['wayfarerexporter-lastupdate'] || 0
            const now = new Date().getTime()
            // cache it for 12 hours
            if (!storedData || now - lastUpdate > 12 * 60 * 60 * 1000) {
                resolve(loadPlannerData())
                return
            }
            resolve(JSON.parse(storedData))
        })

        return promesa
    }

    function loadPlannerData(newUrl) {
        let url = newUrl || getUrl()
        if (!url) {
            url = window.prompt('Script Url for Wayfarer Planner')
            if (!url) {
                return null
            }
        }
        if (!url.startsWith('https://script.google.com/macros/')) {
            alert(
                'The url of the script seems to be wrong, please paste the URL provided after "creating the webapp"'
            )
            return null
        }
        if (url.includes('echo') || !url.endsWith('exec')) {
            alert(
                'You must use the short URL provided by "creating the webapp", not the long one after executing the script.'
            )
            return null
        }
        if (url.includes(' ')) {
            alert(
                "Warning, the URL contains at least one space. Check that you've copied it properly."
            )
            return null
        }
        const fetchOptions = {
            method: 'GET'
        }

        return fetch(url, fetchOptions)
            .then(function (response) {
                return response.text()
            })
            .then(function (data) {
                return JSON.parse(data)
            })
            .then(function (allData) {
                const submitted = allData.filter(
                    (c) =>
                        c.status === 'submitted' ||
                        c.status === 'voting' ||
                        c.status === 'NIANTIC_REVIEW' ||
                        c.status === 'potential' ||
                        c.status === 'held' ||
                        c.status === 'rejected' ||
                        c.status === 'appealed'
                )

                const candidates = {}
                submitted.forEach((c) => {
                    candidates[c.id] = {
                        cell17id: S2.S2Cell.FromLatLng(c, 17).toString(),
                        title: c.title,
                        description: c.description,
                        lat: c.lat,
                        lng: c.lng,
                        status: c.status
                    }
                })
                localStorage['wayfarerexporter-url'] = url
                localStorage['wayfarerexporter-lastupdate'] =
                    new Date().getTime()
                localStorage['wayfarerexporter-candidates'] =
                    JSON.stringify(candidates)
                const tracked = Object.keys(candidates).length
                logMessage(
                    `Loaded a total of ${allData.length} candidates from the spreadsheet.`
                )
                logMessage(`Currently tracking: ${tracked}.`)

                return candidates
            })
            .catch(function (e) {
                console.log(e) // eslint-disable-line no-console
                alert(
                    "Wayfarer Planner. Failed to retrieve data from the scriptURL.\r\nVerify that you're using the right URL and that you don't use any extension that blocks access to google."
                )
                return null
            })
    }

    function removeLogger() {
        logger.parentNode.removeChild(logger)
        logger = null
    }

    function logMessage(txt) {
        if (!logger) {
            logger = document.createElement('div')
            logger.className = 'wayfarer-exporter_log'
            document.body.appendChild(logger)
            const img = document.createElement('img')
            img.src = '/img/sidebar/clear-24px.svg'
            img.className = 'wayfarer-exporter_closelog'
            img.height = 24
            img.width = 24
            img.addEventListener('click', removeLogger)
            logger.appendChild(img)
            const title = document.createElement('h3')
            title.textContent = 'Wayfarer exporter'
            logger.appendChild(title)

            updateLog = document.createElement('div')
            updateLog.className = 'wayfarer-exporter_log-counter'
            logger.appendChild(updateLog)

            msgLog = document.createElement('div')
            msgLog.className = 'wayfarer-exporter_log-wrapper'
            logger.appendChild(msgLog)
        }
        const div = document.createElement('div')
        div.textContent = txt
        msgLog.appendChild(div)
    }

    /**
     S2 extracted from Regions Plugin
     https:static.iitc.me/build/release/plugins/regions.user.js
    */
    const S2 = {}
    const d2r = Math.PI / 180.0

    function LatLngToXYZ(latLng) {
        const phi = latLng.lat * d2r
        const theta = latLng.lng * d2r
        const cosphi = Math.cos(phi)

        return [
            Math.cos(theta) * cosphi,
            Math.sin(theta) * cosphi,
            Math.sin(phi)
        ]
    }

    function largestAbsComponent(xyz) {
        const temp = [Math.abs(xyz[0]), Math.abs(xyz[1]), Math.abs(xyz[2])]

        if (temp[0] > temp[1]) {
            if (temp[0] > temp[2]) {
                return 0
            }
            return 2
        }

        if (temp[1] > temp[2]) {
            return 1
        }

        return 2
    }

    function faceXYZToUV(face, xyz) {
        let u, v

        switch (face) {
            case 0:
                u = xyz[1] / xyz[0]
                v = xyz[2] / xyz[0]
                break
            case 1:
                u = -xyz[0] / xyz[1]
                v = xyz[2] / xyz[1]
                break
            case 2:
                u = -xyz[0] / xyz[2]
                v = -xyz[1] / xyz[2]
                break
            case 3:
                u = xyz[2] / xyz[0]
                v = xyz[1] / xyz[0]
                break
            case 4:
                u = xyz[2] / xyz[1]
                v = -xyz[0] / xyz[1]
                break
            case 5:
                u = -xyz[1] / xyz[2]
                v = -xyz[0] / xyz[2]
                break
            default:
                throw { error: 'Invalid face' }
        }

        return [u, v]
    }

    function XYZToFaceUV(xyz) {
        let face = largestAbsComponent(xyz)

        if (xyz[face] < 0) {
            face += 3
        }

        const uv = faceXYZToUV(face, xyz)

        return [face, uv]
    }

    function UVToST(uv) {
        const singleUVtoST = function (uv) {
            if (uv >= 0) {
                return 0.5 * Math.sqrt(1 + 3 * uv)
            }
            return 1 - 0.5 * Math.sqrt(1 - 3 * uv)
        }

        return [singleUVtoST(uv[0]), singleUVtoST(uv[1])]
    }

    function STToIJ(st, order) {
        const maxSize = 1 << order

        const singleSTtoIJ = function (st) {
            const ij = Math.floor(st * maxSize)
            return Math.max(0, Math.min(maxSize - 1, ij))
        }

        return [singleSTtoIJ(st[0]), singleSTtoIJ(st[1])]
    }

    // S2Cell class
    S2.S2Cell = function () {}

    // static method to construct
    S2.S2Cell.FromLatLng = function (latLng, level) {
        const xyz = LatLngToXYZ(latLng)
        const faceuv = XYZToFaceUV(xyz)
        const st = UVToST(faceuv[1])
        const ij = STToIJ(st, level)

        return S2.S2Cell.FromFaceIJ(faceuv[0], ij, level)
    }

    S2.S2Cell.FromFaceIJ = function (face, ij, level) {
        const cell = new S2.S2Cell()
        cell.face = face
        cell.ij = ij
        cell.level = level

        return cell
    }

    S2.S2Cell.prototype.toString = function () {
        return (
            'F' +
            this.face +
            'ij[' +
            this.ij[0] +
            ',' +
            this.ij[1] +
            ']@' +
            this.level
        )
    }
}

init()