import { getStartPositionInLine, setStartPositionInLine } from './position.js';
import { formatLine, load, save, formatTable, redrawTables, appendData, dpwidth } from './md.js';

function timeoutSave() {
    if (window.tos !== null) {
        window.clearTimeout(window.tos);
    } 
    window.tos = window.setTimeout(onsave, 5000);
}

function ontextarea(e) {
    let ta = document.getElementById('ta');
    if (ta.style.display != 'inline') {
        ta.style.display = 'inline';
    } else {
        ta.style.display = 'none';
    }
}

function onsave(e) {
    let saveButton = document.getElementById('saveButton');
    saveButton.disabled = true;
    let text = save(document.getElementById('ta'), document.getElementById('mdnotes'));
    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange = function() {
        if (this.readyState == 4 && this.status != 200) {
            saveButton.disabled = false;
            alert(xhttp.responseText);
        }
    }
    xhttp.open("PUT", document.location.href, true);
    xhttp.send(text);
}

function onload(e) {
    load(document.getElementById('ta'), document.getElementById('mdnotes'));
}

function onedit(e) {
    console.log('onedit');
    timeoutSave();
    saveButton.disabled = false;
    let ret = getStartPositionInLine();
    let line = ret[0];
    let position = ret[1];

    if (line.innerText == '\n') {
        line.className = 'mdnotes_line';
        line.classList.add('body');
        return;
    }

    let prevline = line.previousSibling;
    if (prevline != null && prevline.innerText == '\n') {
        prevline.className = 'mdnotes_line';
        prevline.classList.add('body');
    }

    let newline = formatLine(line.innerText);
    line.parentNode.replaceChild(newline, line);
    formatTable(newline, dpwidth());
    setStartPositionInLine(newline, position);
    console.log('onedit fin');
}

function onkeydown(e) {
    if (e.key != 'Tab') {
        return true;
    }

    e.preventDefault();
    let key = ' ';
    let ret = getStartPositionInLine();
    let line = ret[0];
    let position = ret[1];
    let txt = line.innerText;
    if (position == 0) {
        line.innerHTML = key + txt;    // 4 espaces =>  
    } else {
        line.innerHTML = txt.substring(0, position) + key + txt.substring(position, txt.length);
    }
    setStartPositionInLine(line, position + 1);
    onedit(e);
    return false;
}

function onkeypress(e) {
    if (e.key == 'Escape') {
        e.preventDefault();
        document.getElementById('mdnotes').blur();
        if (saveButton.disabled == false) {
            onsave();
        }
        return false;
    }
    if (e.key == 'Enter') {

    }
}

function onkeyup(e) {
    if (e.key == 'Escape') {
        e.preventDefault();
        document.getElementById('mdnotes').blur();
        if (saveButton.disabled == false) {
            onsave();
        }
        return false;
    }
}

function onpaste(e) {
    e.preventDefault();
    timeoutSave();
    let data = e.clipboardData.getData('text/plain');
    appendData(document.getElementById('mdnotes'), data);
    saveButton.disabled = false;
    return false;
}

function oncopy(e) {
    //alert(e.clipboardData.getData('text/plain'));
}

function onlockbutton(e) {
    let lockButton = document.getElementById('lockButton');
    let mdnotes = document.getElementById('mdnotes');
    if (lockButton.checked) {
        mdnotes.contentEditable = false;
    } else {
        mdnotes.contentEditable = true;
    }
}

function ondrag(e) {
    // alert('drag');
}

function ondragenter(e) {
    // alert('enter');
}

function ondragleave(e) {
    // alert('leave')
}

function init(pagename = null) {
    /*if (pagename != null) {
        window.history.replaceState(null, '', '/page/' + pagename);
    }*/
    let mdnotesdiv = document.getElementById('mdnotes');

    dpwidth(mdnotesdiv);

    mdnotesdiv.addEventListener('input', onedit);
    mdnotesdiv.addEventListener('keyup', onkeyup);
    mdnotesdiv.addEventListener('keypress', onkeypress);
    mdnotesdiv.addEventListener('keydown', onkeydown);
    mdnotesdiv.addEventListener('paste', onpaste);
    mdnotesdiv.addEventListener('copy', oncopy);
    mdnotesdiv.addEventListener('blur', () => {redrawTables(mdnotesdiv); onsave()});
    mdnotesdiv.addEventListener('focus', () => {redrawTables(mdnotesdiv, dpwidth());});
    mdnotesdiv.addEventListener('drag', ondrag);
    mdnotesdiv.addEventListener('dragenter', ondragenter);
    mdnotesdiv.addEventListener('dragleave', ondragleave);

    let saveButton = document.getElementById('saveButton');
    saveButton.disabled = true;
    saveButton.addEventListener('click', onsave);
    let taButton = document.getElementById('taButton');
    taButton.addEventListener('click', ontextarea);
    let lockButton = document.getElementById('lockButton');
    lockButton.addEventListener('click', onlockbutton);
    onload();
}

export { init };