/**
 * Script for overlay.ejs
 */

/* Overlay Wrapper Functions */

/**
 * Check to see if the overlay is visible.
 * 
 * @returns {boolean} Whether or not the overlay is visible.
 */
function isOverlayVisible(){
    return document.getElementById('main').hasAttribute('overlay')
}

let overlayHandlerContent

let overlayContainer = document.getElementById('overlayContainer')
let accountSelectContent = document.getElementById('accountSelectContent')

/**
 * Overlay keydown handler for a non-dismissable overlay.
 * 
 * @param {KeyboardEvent} e The keydown event.
 */
function overlayKeyHandler (e){
    if(e.key === 'Enter' || e.key === 'Escape'){
        if (overlayContainer.hasAttribute('popup')) {
            toggleOverlay(false)
        } else {
            document.getElementById(overlayHandlerContent).getElementsByClassName('overlayKeybindEnter')[0].click()
        }
    }
}
/**
 * Overlay keydown handler for a dismissable overlay.
 * 
 * @param {KeyboardEvent} e The keydown event.
 */
function overlayKeyDismissableHandler (e){
    if(e.key === 'Enter'){
        document.getElementById(overlayHandlerContent).getElementsByClassName('overlayKeybindEnter')[0].click()
    } else if(e.key === 'Escape'){
        document.getElementById(overlayHandlerContent).getElementsByClassName('overlayKeybindEsc')[0].click()
    }
}

/**
 * Bind overlay keydown listeners for escape and exit.
 * 
 * @param {boolean} state Whether or not to add new event listeners.
 * @param {string} content The overlay content which will be shown.
 * @param {boolean} dismissable Whether or not the overlay is dismissable 
 */
function bindOverlayKeys(state, content, dismissable){
    overlayHandlerContent = content
    document.removeEventListener('keydown', overlayKeyHandler)
    document.removeEventListener('keydown', overlayKeyDismissableHandler)
    if(state){
        if(dismissable){
            document.addEventListener('keydown', overlayKeyDismissableHandler)
        } else {
            document.addEventListener('keydown', overlayKeyHandler)
        }
    }
}

/**
 * Toggle the visibility of the overlay.
 * 
 * @param {boolean} toggleState True to display, false to hide.
 * @param {boolean} dismissable Optional. True to show the dismiss option, otherwise false.
 * @param {string} content Optional. The content div to be shown.
 * @param {boolean} popup Optional. True to show the overlay as a popup that is easily dismissable and interactible.
 */
function toggleOverlay(toggleState, dismissable = false, content = 'overlayContent', popup = false){
    if(toggleState == null){
        toggleState = !document.getElementById('main').hasAttribute('overlay')
    }
    if(typeof dismissable === 'string'){
        content = dismissable
        dismissable = false
    }
    bindOverlayKeys(toggleState, content, dismissable)
    if(toggleState){
        document.getElementById('main').setAttribute('overlay', true)
        overlayContainer.setAttribute('content', content)
        overlayContainer.setAttribute('popup', popup)

        // Make things untabbable.
        $('#main *').attr('tabindex', '-1')
        $('#' + content).parent().children().hide()
        $('#' + content).show()
        if(dismissable){
            $('#overlayDismiss').show()
        } else {
            $('#overlayDismiss').hide()
        }
        $('#overlayContainer').fadeIn({
            duration: 250,
            start: () => {
                if(getCurrentView() === VIEWS.settings){
                    document.getElementById('settingsContainer').style.backgroundColor = 'transparent'
                }
            }
        })
    } else {
        document.getElementById('main').removeAttribute('overlay')
        overlayContainer.removeAttribute('content')

        // Make things tabbable.
        $('#main *').removeAttr('tabindex')
        $('#overlayContainer').fadeOut({
            duration: 250,
            start: () => {
                if(getCurrentView() === VIEWS.settings){
                    document.getElementById('settingsContainer').style.backgroundColor = 'rgba(0, 0, 0, 0.50)'
                }
            },
            complete: () => {
                $('#' + content).parent().children().hide()
                $('#' + content).show()
                if(dismissable){
                    $('#overlayDismiss').show()
                } else {
                    $('#overlayDismiss').hide()
                }
            }
        })
    }
}

async function toggleServerSelection(toggleState){
    await prepareServerSelectionList()
    toggleOverlay(toggleState, false, 'serverSelectContent', true)
}

async function toggleAccountSelection(toggleState, popup = false){    
    if (popup) {
        // set the accountSelectActions div to display: none to avoid colliding with the validateSelectedAccount function
        document.getElementById('accountSelectActions').style.display = 'none'
    } else {
        // set the overlayContainer div to display: block, this is not done while closing the overlay because of the fadeOut effect
        document.getElementById('accountSelectActions').style.display = 'block'
    }

    // show the overlay
    await prepareAccountSelectionList()
    toggleOverlay(toggleState, false, 'accountSelectContent', popup)
}

/**
 * Set the content of the overlay.
 * 
 * @param {string} title Overlay title text.
 * @param {string} description Overlay description text.
 * @param {string} acknowledge Acknowledge button text.
 * @param {string} dismiss Dismiss button text.
 */
function setOverlayContent(title, description, acknowledge, dismiss = Lang.queryJS('overlay.dismiss')){
    document.getElementById('overlayTitle').innerHTML = title
    document.getElementById('overlayDesc').innerHTML = description
    document.getElementById('overlayAcknowledge').innerHTML = acknowledge
    document.getElementById('overlayDismiss').innerHTML = dismiss
}

/**
 * Set the onclick handler of the overlay acknowledge button.
 * If the handler is null, a default handler will be added.
 * 
 * @param {function} handler 
 */
function setOverlayHandler(handler){
    if(handler == null){
        document.getElementById('overlayAcknowledge').onclick = () => {
            toggleOverlay(false)
        }
    } else {
        document.getElementById('overlayAcknowledge').onclick = handler
    }
}

/**
 * Set the onclick handler of the overlay dismiss button.
 * If the handler is null, a default handler will be added.
 * 
 * @param {function} handler 
 */
function setDismissHandler(handler){
    if(handler == null){
        document.getElementById('overlayDismiss').onclick = () => {
            toggleOverlay(false)
        }
    } else {
        document.getElementById('overlayDismiss').onclick = handler
    }
}

/* Account Select button */

// Bind account select confirm button.
document.getElementById('accountSelectConfirm').addEventListener('click', async () => {
    const listings = document.getElementsByClassName('accountListing')
    for(let i=0; i<listings.length; i++){
        if(listings[i].hasAttribute('selected')){
            const authAcc = ConfigManager.setSelectedAccount(listings[i].getAttribute('uuid'))
            ConfigManager.save()
            updateSelectedAccount(authAcc)
            if(getCurrentView() === VIEWS.settings) {
                await prepareSettings()
            }
            toggleOverlay(false)
            validateSelectedAccount()
            return
        }
    }
    // None are selected? Not possible right? Meh, handle it.
    if(listings.length > 0){
        const authAcc = ConfigManager.setSelectedAccount(listings[0].getAttribute('uuid'))
        ConfigManager.save()
        updateSelectedAccount(authAcc)
        if(getCurrentView() === VIEWS.settings) {
            await prepareSettings()
        }
        toggleOverlay(false)
        validateSelectedAccount()
    }
})

// Bind account select cancel button.
document.getElementById('accountSelectCancel').addEventListener('click', () => {
    $('#accountSelectContent').fadeOut(250, () => {
        $('#overlayContent').fadeIn(250)
    })
})

// Bind account select manage button.
document.getElementById('accountSelectManage').addEventListener('click', async () => {
    await prepareSettings()
    switchView(getCurrentView(), VIEWS.settings, 500, 500, () => {
        settingsNavItemListener(document.getElementById('settingsNavAccount'), false)
    })
    toggleOverlay(false)
})

// Make the Server Selection background clickable to close the overlay.
overlayContainer.addEventListener('click', e => {
    if (e.target === overlayContainer) {
        // This function only works if the overlay is a popup
        if(overlayContainer.hasAttribute('popup')) {
            toggleOverlay(false)
        }
    }
})

async function setServerListingHandlers(){
    const listings = Array.from(document.getElementsByClassName('serverListing'))
    listings.map(async (val) => {
        val.onclick = async e => {
            const serv = (await DistroAPI.getDistribution()).getServerById(val.getAttribute('servid'))
            updateSelectedServer(serv)
            refreshServerStatus(true)
            toggleOverlay(false)
        }
    })
}

async function setAccountListingHandlers(){
    const listings = Array.from(document.getElementsByClassName('accountListing'))
    listings.map(async (val) => {
        val.onclick = async e => {
            // popup mode
            if(overlayContainer.hasAttribute('popup')){
                const authAcc = ConfigManager.setSelectedAccount(val.getAttribute('uuid'))
                ConfigManager.save()
                updateSelectedAccount(authAcc)
                if(getCurrentView() === VIEWS.settings) {
                    await prepareSettings()
                }
                toggleOverlay(false)
                validateSelectedAccount()
                return    
            } else {
                if(val.hasAttribute('selected')){
                    return
                }
                const cListings = document.getElementsByClassName('accountListing')
                for(let i=0; i<cListings.length; i++){
                    if(cListings[i].hasAttribute('selected')){
                        cListings[i].removeAttribute('selected')
                    }
                }
                val.setAttribute('selected', '')
                document.activeElement.blur()
            }
        }
    })
}

async function populateServerListings(){
    const distro = await DistroAPI.getDistribution()
    const giaSel = ConfigManager.getSelectedServer()
    const servers = distro.servers
    let htmlString = ''
    for(const serv of servers){
        htmlString += `<button class="serverListing" servid="${serv.rawServer.id}" ${serv.rawServer.id === giaSel ? 'selected' : ''}>
            <img class="serverListingImg" src="${serv.rawServer.icon}"/>
            <div class="serverListingDetails">
                <span class="serverListingName">${serv.rawServer.name}</span>
                <span class="serverListingDescription">${serv.rawServer.description}</span>
                <div class="serverListingInfo">
                    <div class="serverListingVersion">${serv.rawServer.minecraftVersion}</div>
                    <div class="serverListingRevision">${serv.rawServer.version}</div>
                    ${serv.rawServer.mainServer ? `<div class="serverListingStarWrapper">
                        <svg id="Layer_1" viewBox="0 0 107.45 104.74" width="20px" height="20px">
                            <defs>
                                <style>.cls-1{fill:#fff;}.cls-2{fill:none;stroke:#fff;stroke-miterlimit:10;}</style>
                            </defs>
                            <path class="cls-1" d="M100.93,65.54C89,62,68.18,55.65,63.54,52.13c2.7-5.23,18.8-19.2,28-27.55C81.36,31.74,63.74,43.87,58.09,45.3c-2.41-5.37-3.61-26.52-4.37-39-.77,12.46-2,33.64-4.36,39-5.7-1.46-23.3-13.57-33.49-20.72,9.26,8.37,25.39,22.36,28,27.55C39.21,55.68,18.47,62,6.52,65.55c12.32-2,33.63-6.06,39.34-4.9-.16,5.87-8.41,26.16-13.11,37.69,6.1-10.89,16.52-30.16,21-33.9,4.5,3.79,14.93,23.09,21,34C70,86.84,61.73,66.48,61.59,60.65,67.36,59.49,88.64,63.52,100.93,65.54Z"/>
                            <circle class="cls-2" cx="53.73" cy="53.9" r="38"/>
                        </svg>
                        <span class="serverListingStarTooltip">${Lang.queryJS('settings.serverListing.mainServer')}</span>
                    </div>` : ''}
                </div>
            </div>
        </button>`
    }
    document.getElementById('serverSelectListScrollable').innerHTML = htmlString

}

function populateAccountListings(){
    const accountsObj = ConfigManager.getAuthAccounts()
    const accounts = Array.from(Object.keys(accountsObj), v=>accountsObj[v])
    let htmlString = ''
    for(let i=0; i<accounts.length; i++){
        htmlString += `<button class="accountListing" uuid="${accounts[i].uuid}" ${!i && !overlayContainer.hasAttribute("popup") ? 'selected' : ''}>
            <img src="https://mc-heads.net/head/${accounts[i].uuid}/40">
            <div class="accountListingName">${accounts[i].displayName}</div>
        </button>`
    }
    document.getElementById('accountSelectListScrollable').innerHTML = htmlString

}

async function prepareServerSelectionList(){
    await populateServerListings()
    await setServerListingHandlers()
}

async function prepareAccountSelectionList(){
    populateAccountListings()
    await setAccountListingHandlers()
}