const express = require('express'),
    path = require('path'),
    fs = require('fs'),
    WebSocket = require('ws'),
    minify = require('minify-html'),
    sha256 = require('sha256')

var app = express()

const PORT = process.env.PORT || 8080

const staticpath = path.join(__dirname, 'static')
const resourcePath = path.join(__dirname, 'resources')

const mainpage = resourcePath + '/mainPage.html'
var lanyardData = undefined

var config = JSON.parse(fs.readFileSync(path.join(__dirname, 'config.json')))

var thumborInstances = config.thumborInstances

var activityImages = config.activityImages

var highlight = config.highlightedWords

var uptime = Date.now()
var lastLanyardUpdate = Date.now()

var thumbCount = 0

function getThumbor() {
    thumbCount += 1
    return thumborInstances[thumbCount % thumborInstances.length] + "unsafe"
}
app.use(express.static(staticpath))

app.listen(PORT, () => {
    console.log("Violet's Purgatory is now listening on port: " + PORT)
})

if (!fs.existsSync(path.join(staticpath, 'cached'))) {
    fs.mkdirSync(path.join(staticpath, 'cached'))
}

var randomQuotes = config.quotes

function get_img_url(activity, size="large_image") {

    if ("assets" in activity) {
        var image = activity.assets[size]

        if (image) {
            if (image.includes("https/")) {
                return decodeURIComponent('https://' + image.substr(image.indexOf('https/') + 6, image.length))
            } else if (image.includes("spotify")) {
                return decodeURIComponent('https://i.scdn.co/image/' + image.substr(image.indexOf('spotify:') + 8, image.length))
            } else {
                return decodeURIComponent(`https://cdn.discordapp.com/app-assets/${activity.application_id}/${image}.png`)
            }
        }
    }

    if (!image) {
        if (activity.name in activityImages) {
            return decodeURIComponent(activityImages[activity.name])
        } else {
            return null
        }
    }
}

function timeFormatter(seconds) {
    seconds = Math.ceil(seconds)
    var minutes = Math.floor(seconds / 60)

    if (seconds % 60 < 10) {
        return `${minutes}:0${seconds % 60}`
    } else {
        return `${minutes}:${seconds % 60}`
    }

}

function gameTimeFormatter(seconds) {
    seconds = Math.ceil(seconds)
    var minutes = Math.ceil(seconds / 60)
    var hours = Math.floor(minutes / 60)
    if (seconds <= 60) {
        return 'Under a minute'
    } else if (minutes < 60) {
        return `${minutes} Minutes`
    }

    return `${hours} hours and ${minutes % 60} minutes`

}

async function pageUpdate() {

    var genStart = Date.now()

    var statuses = {
        "online": {
            "text": "Online",
            "color": "rgb(100, 255, 100)"
        },
        "dnd": {
            "text": "DND",
            "color": "rgb(255, 100, 100)"
        },
        "idle": {
            "text": "Idle",
            "color": "rgb(255, 255, 75)"
        },
        "offline": {
            "text": "Offline",
            "color": "rgb(125, 125, 125)"
        }
    }

    var html = fs.readFileSync(mainpage).toString()

    var addedHTML = ""

    if (lanyardData) {
        var statusData = statuses[lanyardData.discord_status]

        addedHTML += `<p style="color: ${statusData.color}">${statusData.text}</p>`
        addedHTML += `<style>.pfp { border-color: ${statusData.color} !important }</style>`
    }

    html = html.replace("{LANYARD_STATUS}", addedHTML)

    addedHTML = ""

    if (lanyardData && lanyardData.activities.length > 0) {
        if (lanyardData.activities[0].type == 4) {
            var status = lanyardData.activities[0]
            addedHTML += "<hr><p>"
            if (status.emoji) {
                if (status.emoji.id) {
                    addedHTML += `<img class="emoji" src="${getThumbor()}/https://cdn.discordapp.com/emojis/${status.emoji.id}.webp?size=32&quality=lossless"/> `
                } else {
                    addedHTML += status.emoji.name
                }
            }
            if (status.state) {
                addedHTML += `<em><span style="color: lightgray; white-space: pre-wrap">"`
                // addedHTML += (status.state || "")
                var splitStatus = status.state.split(' ')

                for (let index = 0; index < splitStatus.length; index++) {
                    const text = splitStatus[index];
                    if (highlight[text]) {
                        addedHTML += `<span style="color: ${highlight[text]}">${text}</span>`
                    } else {
                        addedHTML += text
                    }
                    addedHTML += ' '
                }
                addedHTML = addedHTML.trim()
                addedHTML += `"</span>`
            }
            addedHTML += ` - ${lanyardData.discord_user.display_name} ${new Date(Date.now()).getFullYear()}</em></p>`
        }
    }

    html = html.replace("{LANYARD_QUOTE}", addedHTML)

    addedHTML = ""

    var debounce = false

    if (lanyardData && lanyardData.activities.length > 0) {
        for (let index = 0; index < lanyardData.activities.length; index++) {
            const activity = lanyardData.activities[index];

            var found = false
            for (let index = 0; index < lanyardData.activities.length; index++) {
                const act = lanyardData.activities[index]
                if (act.name == activity.name) {
                    if (Object.keys(act).length > Object.keys(activity).length) {
                        found = true
                    }
                }
            }
            if (found) {
                continue
            }

            if (!debounce && activity.type != 4) {
                addedHTML += `<h2><hr>What I'm up to:</h2><div class="container-fluid row" style="margin: 0; padding: 0; display: flex;">`
                debounce = true
            }


            function get_img(activity, size="large_image") {
                if (get_img_url(activity, size)) {
                    var fn = sha256(get_img_url(activity, size))
                    var fp = path.join(staticpath, 'cached', fn)
    
                    if (!fs.existsSync(fp)) {
                        return 'imgs/notFound.png'
                    } else if (fs.statSync(fp).size < 1000) {
                        fs.rmSync(fp)
                    }
                } else {
                    return 'imgs/notFound.png'
                }

                return '/cached/' + fn
            }

            function songStats() {
                var html = ``

                if (activity.assets && activity.assets.large_text != activity.details) {
                    html += `
                    <br> Album: ${activity.assets.large_text || " "}
                    <br> Artist: ${activity.state || " "}
                    `
                } else {
                    html += `<br> Artist: ${activity.state || " "}`
                }

                return html
            }
            if (activity.type == 2) {
                var timeLeft = Math.round((activity.timestamps.end - Date.now()) / 1000)
                var currentPercent = (Date.now() - activity.timestamps.start) / (activity.timestamps.end - activity.timestamps.start) * 100
                addedHTML += `
                <div class="chip activity col-md-6 testing">
                    <img src="${get_img(activity)}" title="${activity.assets.large_text || activity.assets.small_text}">
                        <p>
                            Listening to <span style="color: limegreen;">${activity.name}</span> 
                            <br> Song: ${activity.details || " "}
                            ${songStats()}
                            <br>
                            <span class="lengthBar lengthBar${index}"><span></span></span>
                            ${timeFormatter((activity.timestamps.end - activity.timestamps.start) / 1000)}
                        </p>
                    </div>

                <style>

                .lengthBar${index} > span {
                    animation-name: songSlider${index};
                    animation-duration: ${timeLeft}s;
                    animation-timing-function: linear;
                }

                @keyframes songSlider${index} {
                    0% {
                        width: ${currentPercent}%;
                    }
                    100% {
                        width: 100%;
                    }
                }
                </style>
                `
            } else if (activity.type == 0) {
                var time = activity.created_at
                if (activity.timestamps) {
                    time = activity.timestamps.start
                }
                if (!activity.assets) {
                    activity.assets = { "large_text": " ", "small_text": " " }
                }

                function smch() {
                    if (get_img_url(activity, "small_image")) { 
                        return `<img class="smallimg" src="${get_img(activity, "small_image")}" title="${activity.assets.small_text}">`
                    }
                    return ""
                }


                addedHTML += `
                    <div class="chip activity col-md-6 testing">
                            <img src="${get_img(activity)}" title="${activity.assets.large_text}">
                            ${smch()}
                            <p>
                                Playing <span style="color: rgb(255, 100, 150);">${activity.name}</span> 
                                <br> ${(activity.details || activity.assets.large_text || " ")}
                                <br> ${(activity.state || activity.assets.small_text || " ")}
                                <br> ${gameTimeFormatter((Date.now() - time) / 1000)}
                            </p>

                    </div>
                `
            } else if (activity.type != 4) {
                var time = activity.created_at
                if (activity.timestamps) {
                    time = activity.timestamps.start
                }
                if (!activity.assets) {
                    activity.assets = { "large_text": " ", "small_text": " " }
                }

                addedHTML += `
                    <div class="chip activity col-md-6 testing">
                            <img src="${get_img(activity)}" title="${activity.assets.large_text || activity.assets.small_text}">
                            <p>
                                <span style="color: rgb(225, 200, 255);">${activity.name}</span> 
                                <br> ${(activity.details || activity.assets.large_text || " ")}
                                <br> ${(activity.state || activity.assets.small_text || " ")}
                                <br> ${gameTimeFormatter((Date.now() - time) / 1000)}
                            </p>

                    </div>
                `
            }
        }
    }

    if (addedHTML) {
        addedHTML += "</div>"
    }

    html = html.replace("{LANYARD_FULL}", addedHTML)

    addedHTML = ""

    var socialsHTML = fs.readFileSync(path.join(__dirname, 'static/socials/index.html')).toString()
    addedHTML += socialsHTML.substring(socialsHTML.indexOf("<h1>"), socialsHTML.indexOf("</body>"))

    html = html.replace("{SOCIALS}", addedHTML)

    var now = new Date()

    currentMonth = now.getMonth() + 1

    if ([11, 12].includes(currentMonth)) { // The Below HTML is copy and pasted from that one site :>
        html = html.replace("{SEASONAL_EFFECT}", fs.readFileSync(path.join(__dirname, 'static/snow.html')))
    } else {
        html = html.replace("{SEASONAL_EFFECT}", "")
    }

    var quote = randomQuotes[Math.floor(Math.random() * randomQuotes.length)]

    var splitQuote = quote.split(' ')

    var finalQuote = ''

    for (let index = 0; index < splitQuote.length; index++) {
        const text = splitQuote[index];
        if (highlight[text]) {
            finalQuote += `<span style="color: ${highlight[text]}">${text}</span>`
        } else {
            finalQuote += text
        }
        finalQuote += ' '
    }

    quote = finalQuote.trim()

    quote = quote.replace("{QUOTE_COUNT}", randomQuotes.length)

    html = html.replace("{RANDOM_QUOTE}", quote)

    if (process.env.BRANCH == "dev") {
        html = html.replace("{OPPOSITE_URL}", "www")
        html = html.replace("{OPPOSITE_BRANCH}", "Main")
    } else {
        html = html.replace("{OPPOSITE_URL}", "beta")
        html = html.replace("{OPPOSITE_BRANCH}", "Beta")
    }

    html = html.replace("{UPTIME}", gameTimeFormatter((Date.now() - uptime) / 1000) + ' ago')
    html = html.replace("{LAST_LANYARD}", gameTimeFormatter((Date.now() - lastLanyardUpdate) / 1000) + ' ago')
    html = html.replace("{QUOTE_COUNT}", randomQuotes.length)
    html = html.replace("{CACHED_IMAGES}", fs.readdirSync(path.join(staticpath, 'cached')).length)

    html = html.replace("{GENERATION_TIME}", Math.ceil(Date.now() - genStart).toString() + 'ms')

    //fs.writeFileSync(path.join(__dirname, 'static/index.html'), html)
    return html
}


// Lanyard Stuffs

var lanyard = new WebSocket('wss://api.lanyard.rest/socket')

function beat(dur) {
    lanyard.send(JSON.stringify({
        op: 3
    }))
    setTimeout(() => {
        beat(dur)
    }, dur);
}

lanyard.addEventListener("message", (res) => {
    var data = JSON.parse(res.data)
    if (data.op == 1) {
        beat(data.d.heartbeat_interval)
        lanyard.send(JSON.stringify({
            op: 2,
            d: {
                subscribe_to_id: "534132311781015564"
            }
        }))
    } else if (data.op == 0) {
        lanyardData = data.d
        lastLanyardUpdate = Date.now()

        for (let index = 0; index < lanyardData.activities.length; index++) {
            const activity = lanyardData.activities[index];

            if (get_img_url(activity)) {
                var fn = sha256(get_img_url(activity))
                var fp = path.join(__dirname, 'static/cached', fn)
                if (!fs.existsSync(fp)) {
                    var wrst = fs.createWriteStream(fp)

                    fetch(`${get_img_url(activity)}`)
                        .then((response) => response.body)
                        .then((body) => {
                            const stream = new WritableStream({
                                write(chunk) {
                                    wrst.write(chunk)
                                }
                            })

                            body.pipeTo(stream)
                        })
                }
            }
            if (get_img_url(activity, "small_image")) {
                var fn = sha256(get_img_url(activity, "small_image"))
                var fp = path.join(__dirname, 'static/cached', fn)
                if (!fs.existsSync(fp)) {
                    var wrst = fs.createWriteStream(fp)

                    fetch(`${get_img_url(activity, "small_image")}`)
                        .then((response) => response.body)
                        .then((body) => {
                            const stream = new WritableStream({
                                write(chunk) {
                                    wrst.write(chunk)
                                }
                            })

                            body.pipeTo(stream)
                        })
                }
            }
        }
        
    }
})

app.get('/', async (req, res) => {
    var html = await (pageUpdate())
    res.send(minify.minify(html))
})

app.use((req, res, next) => {
    res.status(404).send(`
        <link rel="stylesheet" href="/style.css">
        <h1>404</h1>
        <p>Uh oh... I think your lost? There's nothing here :P</p>
        `)
})