// I'm not a React developer. Be advised! 
// If you are, and want to rewrite this the "right way", go ahead and do it :)
// This is plain Javascript and only requires basic calls to implement customizations


// Do simple XHR requests to the API on Mastodon
//  make sure you control errors correctly, as a Mastodon Server might not setup CORS correctly
function mastodon_get(path, payload, callbk)  { return mastodon_request('GET',  path, payload, callbk); }
function mastodon_post(path, payload, callbk) { return mastodon_request('POST', path, payload, callbk); }
function mastodon_request(method, path, payload, callbk) {
    payload = payload || null;
    var url      = 'https://'+fediloveApi.getCurrentInstance()+path;

    var oReq = new XMLHttpRequest();
    oReq.addEventListener("load", function() { callbk(this.responseText); });
    oReq.open(method, url);
    oReq.setRequestHeader('Authorization', 'Bearer '+fediloveApi.getAccessToken());
    oReq.send(payload);
}

function api_status_fav(dom, status_id) {
    var dislike = false;
    var path = `/api/v1/statuses/${status_id}/favourite`;
    if (dom.getAttribute('data-liked') === "1") {
        path = `/api/v1/statuses/${status_id}/unfavourite`;
        dislike = true;
    }
    mastodon_post(path, {}, function(data) {
        // to-do: check "data" if the POST succeded (for now we expect it did xD)
        if (!dislike) {
            $(dom).addClass('liked-msg');
            $(dom).attr('data-liked', 1);
            dom.style.animation = "spin2 .5s linear 1";
        } else {
            $(dom).removeClass('liked-msg');
            $(dom).attr('aria-label', '0 '+$(dom).attr('aria-label'));
            $(dom).removeAttr('data-liked');
            dom.style.animation = undefined;
        }
    });
}

// We use the already polished compose system to trick it to send messages using our custom UI
//  instead of the reply compose box show in every message when you hit "reply"
function api_send_message(dom) {

    // the status_id is the last part of our current URL
    const status_id = fediloveApi.getChatStatusId();
    const msgText = $('div#chat-compose-global textarea').val();
    if (msgText.trim() === '') {
        return false;
    }

    // search for the reply on status_id, dictated by URL
    $('button[id*=reply-]').each(function(i) {
        if ($(this).attr('id').includes('//'+status_id))
        {
            // click the reply button on the current status, dictated by URL
            if ($('#the-compose-box-input-'+status_id).length == 0) {
                $(this).click();
            }

            // wait for the button event to make the compose layer "visible"
            var _this = setInterval(function()
            {
                if ($('#the-compose-box-input-'+status_id).length > 0) {
                    // search for the user ID in the title attribute
                    $('a[id*=status-author-name-]').each(function(i2) {
                        if ($(this).attr('id').includes('//'+status_id))
                        {
                            // title contains the user ID on this server
                            var text = $(this).attr('title')+' '+msgText;

                            // set the text on thie invisible compose box of the status_id
                            $('textarea#the-compose-box-input-'+status_id).val(text);
                            // hit send :)
                            $('div#list-item-'+status_id+' div.status-article-compose-box > div.compose-box-button-wrapper button.compose-box-button').click();
                            // empty our message box
                            $('div#chat-compose-global textarea').val('');
                            fediloveUI.scrollChatToLastItem();
                        }
                    });

                    clearInterval(_this);
                }
            }, 100);
        }
    });
}

var fediloveUI = {
    scrollChatToLastItem: function() {
        const startLen = $('div.the-list > div').length;
        var count = 0;
        var _this = setInterval(function() {
            count++;
            var newLen = $('div.the-list > div').length;
            if (count >= 100 || newLen != startLen) {
                document.querySelector('div.the-list > div:last-child').scrollIntoView();
                clearInterval(_this);
            }
        }, 150);
    }
};

// objects to access from React code
var fediloveApi = {
    getAccessToken: function() {
        var instance = fediloveApi.getCurrentInstance();
        return JSON.parse(localStorage.store_loggedInInstances)[instance].access_token;
    },
    getCurrentInstance: function() {
        return JSON.parse(localStorage.store_currentInstance);
    },
    getChatStatusId: function() {
        var parts = window.location.pathname.split('/');
        return parts[parts.length-1];
    }
};
var fediloveReact = {};
var fediloveFunctions = {};
var fediloveData = {
    currentChat: null
};
var fediloveEvents = {
    onEmojiPicked: function(emoji) {
        var $txt = $("#chat-compose-global textarea");
        var caretPos = $txt[0].selectionStart;
        var textAreaTxt = $txt.val();
        $txt.val(textAreaTxt.substring(0, caretPos) + emoji + textAreaTxt.substring(caretPos));
    },
    onNewNotification: function (dataItems) {
        if (window.location.pathname.startsWith('/statuses/')) {
            if (fediloveFunctions.updateStatusAndThread !== undefined) {
                fediloveFunctions.updateStatusAndThread( fediloveApi.getCurrentInstance(), fediloveApi.getAccessToken(),
                    window.location.pathname, fediloveApi.getChatStatusId() );
                fediloveUI.scrollChatToLastItem();
            }
        }
    }
};


// this is our URL-based customizations made by JavaScript
var intervalChatCssChange = null;
function fedilove_customization() {
    document.body.classList = '';
    document.querySelector('.main-content').classList = "main-content";
    document.querySelector('#chat-compose-global').style = 'visibility: collapse';
    document.querySelector('#chat-party-hide').style = 'display: none !important';
    document.querySelector('nav#main-nav > ul.main-nav-ul').style = '';

    if (window.location.pathname.startsWith('/statuses/'))
    {
        $('div.main-content').addClass('chat');
        $('body').addClass('chat');
        document.querySelector('#chat-compose-global').style = '';
        document.querySelector('#chat-party-hide').style = '';
        document.querySelector('nav#main-nav > ul.main-nav-ul').style = 'display: none !important';

        // add some animations
        var style = document.createElement('style');
        style.innerHTML = '@keyframes spin2 { 100% { transform:rotate(-360deg); } }';
        document.body.appendChild(style);

        // this function changes the css class on articles (messages)
        //  that match the given account_id
        var makeMessageUIModifications = function(account_id) {
            if (intervalChatCssChange !== null) return;
            var theint = 150;
            setInterval(function()
            {
                intervalChatCssChange = this;

                // paint MY messages as mine
                $('div.main-content.chat article.status-article').each(function(i) {
                    if ($(this).find('a.status-author-name').attr('href').endsWith(`/accounts/${account_id}`)) {
                        $(this).addClass('mymsg');
                        theint = 250;
                    } else {
                        $(this).addClass('partymsg');
                    }
                });

                // paint LIKES
                $('a.status-favs-reblogs.status-favs').each(function(i) {
                    // easy, aria-label contains the times this status was fav
                    //  so, we use this as the input source to search for "0",
                    //  if no "0" found in text, we mark element as liked so we can apply styles and "undo like" function
                    if ($(this).attr('aria-label').search(/0/) == -1) {
                        $(this).addClass('liked-msg');
                        $(this).attr('data-liked', 1);
                    }
                });

                // remove liking functionality from our own messages
                $('div.the-list article.status-article.mymsg a.status-favs-reblogs').each(function(i) {
                    $(this).attr('onclick', 'return false;');
                });

            }, theint);
        };

        // get the userAccountId to check against the href /account/NUM on the messages
        //  so we can apply different style to my messages
        if (localStorage.store_userAccountId === undefined) {
            mastodon_get('/api/v1/accounts/verify_credentials', {}, function(data) {
                var json = JSON.parse(data);
                if (json !== undefined) {
                    localStorage.store_userAccountId = json.id;
                    makeMessageUIModifications(json.id);
                }
            });
        } else {
            makeMessageUIModifications(localStorage.store_userAccountId);
        }
    }
    else if (window.location.pathname == '/direct') {
        $('div.main-content').addClass('direct');
    }
    else if (window.location.pathname.startsWith('/notifications/mentions')) {
        $('nav.notification-filters li > a.focus-fix').attr('onclick', 'return false;');
    }
}

// we inject this script.js into the React framework at timelines.js
// Watch for URL changes every 1/2 seconds (this is efficient, don't worry about it!)
//  and dispatch a call to "fedilove_customization" to load page customizations depending on URL context
var theurl = null;
setInterval(function() {
    var newurl = window.location.pathname;
    if (newurl != theurl) {
        fedilove_customization();
        theurl = newurl;
    }
}, 250);