/*
    Onionr - Private P2P Communication

    This file handles the boards/circles interface

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

requested = []

var windowHeight = window.innerHeight;
webpassword = webpass
newPostForm = document.getElementById('addMsg')
firstLoad = true
lastLoadedBoard = 'global'
loadingMessage = document.getElementById('loadingBoard')

let toggleLoadingMessage = function(){
    switch (loadingMessage.style.display){
        case "block":
        case "inline":
        case "inline-block":
            loadingMessage.style.display = "none"
        break;
        default:
            loadingMessage.style.display = "initial"
        break;
    }
}

fetch('/flow/version', {
    method: 'GET',
    headers: {
      "token": webpass
    }})
.then((resp) => resp.text()) // Transform the data into json
.then(function(data) {
    document.getElementById('circlesVersion').innerText = data
})

function appendMessages(msg, blockHash, beforeHash){
    var humanDate = new Date(0)
    if (msg.length == 0){
        return
    }
    //var msg = JSON.parse(msg)
    var el = document.createElement('div')
    var msgDate = msg['meta']['time']
    var feed = document.getElementById("feed")
    var beforeEl = null

    if (msgDate === undefined){
        msgDate = 'unknown'
    }
    else{
        humanDate.setUTCSeconds(msgDate)
        msgDate = humanDate.toDateString()
    }
    el.className = 'entry'
    el.innerText = msg['content']
    if (beforeHash !== null){
        for (x = 0; x < feed.children.length; x++){
            if (feed.children[x].getAttribute('data-bl') === beforeHash){
                beforeEl = feed.children[x]
            }
        }
    }

    /* Template Test */
    // Test to see if the browser supports the HTML template element by checking
    // for the presence of the template element's content attribute.
    if ('content' in document.createElement('template')) {

        // Instantiate the table with the existing HTML tbody
        // and the row with the template
        var template = document.getElementById('cMsgTemplate')

        // Clone the new row and insert it into the table
        var clone = document.importNode(template.content, true)
        var div = clone.querySelectorAll("div")

        div[0].setAttribute('data-bl', blockHash)
        div[2].textContent = msg['content']
        if (typeof msg['meta']['signer'] != 'undefined'){
            div[3].textContent = msg['meta']['signer'].substr(0, 5)
            div[3].title = msg['meta']['signer']
        }
        div[4].textContent = msgDate

        loadingMessage.style.display = "none"
        if (firstLoad){
            //feed.appendChild(clone)
            feed.prepend(clone)
            firstLoad = false
        }
        else{
            if (beforeEl === null){
                feed.prepend(clone)
            }
            else{
                //feed.insertAfter(clone, beforeEl)
                beforeEl.insertAdjacentElement("beforebegin", clone)
            }

        }

    }
}

function getBlocks(){
    var feed = document.getElementById("feed")
    var ch = document.getElementById('feedIDInput').value
    if (lastLoadedBoard !== ch){
        toggleLoadingMessage()
        while (feed.firstChild) {
            feed.removeChild(feed.firstChild);
        }
        requested = [] // reset requested list
    }

    lastLoadedBoard = ch
    if (document.getElementById('none') !== null){
        document.getElementById('none').remove();

    }

    var feedText =  httpGet('/flow/getpostsbyboard/' + ch)
    var blockList = feedText.split(',')

    for (i = 0; i < blockList.length; i++){
        while (blockList[i].length < 64) { blockList[i] = "0" + blockList[i] }
        if (! requested.includes(blockList[i])){
            if (blockList[i].length == 0){
                continue
            }
            requested.push(blockList[i])
            loadMessage(blockList[i], blockList, i)
        }
    }
}

function loadMessage(blockHash, blockList, count){
    fetch('/getblockdata/' + blockHash, {
        method: 'GET',
        headers: {
          "token": webpass
        }})
    .then((resp) => resp.json())
    .then(function(data) {
        let before = blockList[count - 1]
        let delay = 2000
        if (typeof before == "undefined"){
            before = null
        }
        else{
            let existing = document.getElementsByClassName('cMsgBox')
            for (x = 0; x < existing.length; x++){
                if (existing[x].getAttribute('data-bl') === before){
                    delay = 0
                }
            }
        }
        setTimeout(function(){appendMessages(data, blockHash, before)}, delay)
        //appendMessages(data, blockHash, before)
      })
}


document.getElementById('refreshFeed').onclick = function(){
    getBlocks()
}

newPostForm.onsubmit = function(){
    var message = document.getElementById('newMsgText').value
    var channel = document.getElementById('feedIDInput').value
    var meta = {'ch': channel}
    let doSign = document.getElementById('postAnon').checked
    var postData = {'message': message, 'sign': doSign, 'type': 'brd', 'encrypt': false, 'meta': JSON.stringify(meta)}
    postData = JSON.stringify(postData)
    newPostForm.style.display = 'none'
    fetch('/insertblock', {
        method: 'POST',
        body: postData,
        headers: {
          "content-type": "application/json",
          "token": webpass
        }})
    .then((resp) => resp.text()) // Transform the data into json
    .then(function(data) {
        newPostForm.style.display = 'block'
        if (data == 'failure due to duplicate insert'){
            PNotify.error({
                text: "This message is already queued"
            })
            return
        }
        PNotify.success({
            text: "Message queued for posting"
          })
        setTimeout(function(){getBlocks()}, 500)
      })
    return false
}