/*! @file

    @id $Id$

    This is the main application as it is fully run in the user's browser.

*/
//       1         2         3         4         5         6         7         8
// 45678901234567890123456789012345678901234567890123456789012345678901234567890

var socket = io.connect();
var focused = null;

var docker = new Docker();

function htmlenc(html) {
    return $('<div/>').text(html).html();
}

function htmldec(data) {
    return $('<div/>').html(data).text();
}

/// Show error messsage
/** Fades in an error message and logs to console.
    @param data (optional) The error can be a string or any structure.
                Strings are shown to the user, structures are logged only.
    @param stay (optional) If not given as @c true, reloads page after 5s. */
function error(data) {
    $("#status").fadeOut("slow", function() {
        $("#status").addClass("error")
        $("#status").removeClass("notice")
        $("#status").removeClass("success")
        if (data) {
            if (typeof data == 'string') {
                $("#status").html(data);
                console.log("error: "+data);
            } else {
                $("#status").html('unknown error: '+JSON.stringify(data));
                console.log("error: ", data);
                console.log((new Error('stacktrace')));
            }
        } else {
            $("#status").html('error');
            console.log("error");
        }
        $("#status").fadeIn("slow");
    });
}

/// Show notice messsage
/** Fades in an notice message and logs to console.
    @param text (optional) The data is a string. */
function notice(text) {
    $("#status").fadeOut("slow", function() {
        $("#status").addClass("notice")
        $("#status").removeClass("error")
        $("#status").removeClass("success")
        if (text) {
            $("#status").html(text);
            console.log("notice: "+text);
        } else {
            $("#status").html('');
            console.log("notice");
        }
        $("#status").fadeIn("slow");
    });
}

/// Show notice messsage
/** Fades in an success message and logs to console.
    @param text (optional) The data is a string. */
function success(text) {
    $("#status").fadeOut("slow", function() {
        $("#status").addClass("success")
        $("#status").removeClass("error")
        $("#status").removeClass("notice")
        if (text) {
            $("#status").html(text);
            console.log("success: "+text);
        } else {
            $("#status").html('');
            console.log("success");
        }
        $("#status").fadeIn("slow");
    });
}

/// Show status message in the main screen area
/** @param text Text is a message or some complex HTML from the server.
    @param msg The success message text */
function status(text, msg) {
    $("#main").hide();
    $("#main").html(text);
    if (msg) success(msg);
    else setTimeout("$('#status').fadeOut('slow')", 5000);
    zoom(0);
    stats();
    $("#main").show();
    $("form input:first-child").focus();
    docker.containers.contextmenu("#main");
}

function emit(signal, data) {
    console.log("<-snd "+signal, data);
    socket.emit(signal, data);
}

function connected() {
    console.log("server connected");
    $("#connectionstatus #bad").hide();
    $("#connectionstatus #good").show();
    success("server connected");
}

function disconnected() {
    console.log("server disconnected");
    $("#connectionstatus #good").hide();
    $("#connectionstatus #bad").show();
    error("server disconnected", true);
}

function connectionstatus() {
    if (socket.connected) connected(); else disconnected();
}

/// Toggle Menu Display
function togglemenu() {
    $("#menu").toggle();
}

/// Upload a configuration and send it to server
function upload(evt) {
    if (!window.FileReader)
        return error("your browser does not support file upload", true);
    for (var i=0, f; f=evt.target.files[i]; ++i) {
        var file = f;
        var reader = new FileReader();
        reader.onload = function(evt) {
            if (evt.target.error) return error("error reading file", true);
            if (evt.target.readyState==0) return notice("waiting for data …");
            if (evt.target.readyState==1) return notice("loading data …");
            emit("create", evt.target.result);
        }
        reader.readAsText(file);
    }
}

function create() {
    $("#create form fieldset input.add").click(function() {
        $(this).siblings("select").append('<option>'+$(this).siblings("input").map(function() {return $(this).text()}).get().join(':'))+'</option>')
    });
    //$("#preview").html(Viz("digraph {\nrankdir="+rankdir+";\n"+docker.containers.graph()+"\n}"));
}

var zoomlevel = 0;
function zoom(incr = 0) {
    zoomlevel = (zoomlevel+incr)%2;
    switch (zoomlevel) {
        case 0: {
            $("#main svg").css("width", "auto");
            $("#main svg").css("height", "auto");
            $("#main svg").css("max-width", "100%");
            $("#main svg").css("max-height", "100%");
        } break;
        case 1: {
            $("#main svg").css("width", "100%");
            $("#main svg").css("height", "auto");
            $("#main svg").css("max-width", "100%");
            $("#main svg").css("max-height", "none");
        } break;
        case 2: {
            $("#main.svg").css("width", "auto");
            $("#main.svg").css("height", "100%");
            $("#main.svg").css("max-width", "none");
            $("#main.svg").css("max-height", "100%");
        } break;
    }
}

var viz = null;
var vizmore = null;
var rankdir = "LR";
function rotateviz() {
    if (!viz) return;
    if (rankdir == "LR")
        rankdir = "TB";
    else
        rankdir = "LR";
    showviz();
}
function showviz(vizpath, more) {
    if (!vizpath) {
        vizpath = viz;
        more = vizmore;
    } else {
        viz = vizpath;
        vizmore = more;
    }
    res = "digraph {\n"+"  rankdir="+rankdir+";\n"+viz+"\n}";
    try {
        status(more?Viz(res)+more:Viz(res));
        $('#main a > ellipse + text').attr('font-size', '12');
        $('#main a > ellipse + text + text')
            .attr('font-weight', 'bold')
            .attr('font-size', '16')
            .each(function() {$(this).attr('y', parseFloat($(this).attr('y'))+1.0)});
        $('#main a > ellipse + text + text + text').attr('font-size', '12');
    } catch(e) {
        (res = res.split("\n")).forEach(function(v, i, a) {
            a[i] = ("000"+(i+1)).slice(-3)+": "+v;
        });
        status("<h2>Exception Caught:</h2><p>"+e+"<p><pre>"+res.join("\n")+"</pre>");
    }
}

function details(name) {
    if (name) focused = name;
    else if (!focused) return overview();
    showviz(docker.containers.subgraph(focused));
}

/// Convert number of bytes to readable text
function size(num) {
    if (num>0.6*1024) {
        if (num>0.6*1024*1024) {
            if (num>0.6*1024*1024*1024) {
                if (num>0.6*1024*1024*1024*1024) {
                    return Math.round(num/1024/1024/1024/1024)+"TB";
                } else {
                    return Math.round(num/1024/1024/1024)+"GB";
                }
            } else {
                return Math.round(num/1024/1024)+"MB";
            }
        } else {
            return Math.round(num/1024)+"kB";
        }
    } else {
        return num+"B";
    }
}

var oldoldstats = null;
var oldstats = null;
function stats(data) {
    console.log("->rcv stats");
    if (!data && oldstats && oldoldstats) {
        data = oldstats;
        oldstats = oldoldstats;
    }
    if (oldstats) for (name in data) {
        var s = data[name];
        var o = oldstats[name];
        if (!o|| !s) continue;
        $('#main text + text:contains("'+name+'") + text')
            .html('cpu: '
                  +(Math.round((s.cpuacct.usage.data-o.cpuacct.usage.data)
                               /(s.cpuacct.usage.date-o.cpuacct.usage.date)
                               /100)
                    /100)
                  +'% mem: '
                  +size(s.memory.usage_in_bytes.data));
    }
    oldoldstats = oldstats;
    oldstats = data;
}

function images(i) {
    console.log("->rcv images");
    docker.images.set(i);
}

function containers(c) {
    console.log("->rcv containers");
    docker.containers.set(c);
    if (focused && docker.containers.exists(focused))
        details(focused);
    else
        overview();
}

function showImage() {
    $("#create").hide();
    $("#logs").hide();
    $("#console").hide();
    $("#close").hide();
    $("#imagetools").show();
    $("#main").show();
}

function showCreate() {
    $("#main").hide();
    $("#logs").hide();
    $("#console").hide();
    $("#imagetools").hide();
    $("#close").show();
    $("#create").show();
    create();
}

function showConsole() {
    $("#main").hide();
    $("#create").hide();
    $("#logs").hide();
    $("#imagetools").hide();
    $("#console").show();
    $("#close").show();
    // $("#command").focus();
    // $("#command").val("");
    // if ($("#screen").val()!="") $("#screen").append("\n");
}

function showLogs() {
    $("#main").hide();
    $("#create").hide();
    $("#console").hide();
    $("#imagetools").hide();
    $("#close").show();
    $("#logs").show();
}

function logs(data) {
    console.log("->rcv logs("+data.name+")");
    if (data.type=='done') {
        $("#logs").append('<span class="'+data.type+'">\nDONE</span>');
    } else {
        $("#logs").append('<span class="'+data.type+'">'+htmlenc(data.text)+'</span>');
    }
}

function strInsert(str, pos, txt) {
    return str.slice(0, pos)+txt+str.slice(pos);
}

function ansifilter(data) {
    console.log("ansifilter");
    var res = data;
    var pos = -1;
    var spans = 0;
    while ((pos=res.indexOf("\x1B[")) >= 0) {
        var end = res.indexOf("m", pos+2);
        if (end>0) {
            var control= res.slice(pos+2, end);
            res = res.slice(0, pos)+res.slice(end+1);
            control.split(';').forEach(function(c) {
                switch (parseInt(c)) {
                    // set
                    case 1: res = strInsert(res, pos, '<span class="bold">'); ++spans; break;
                    case 2: res = strInsert(res, pos, '<span class="dim">'); ++spans; break;
                    case 4: res = strInsert(res, pos, '<span class="underlined">'); ++spans; break;
                    case 5: res = strInsert(res, pos, '<span class="blink">'); ++spans; break;
                    case 7: res = strInsert(res, pos, '<span class="reverse">'); ++spans; break;
                    case 8: res = strInsert(res, pos, '<span class="hidden">'); ++spans; break;
                    // reset
                    case 0: for (;spans;--spans) res = strInsert(res, pos, "</span>"); break;
                    case 21: if (spans) --spans; res = strInsert(res, pos, "</span>"); break;
                    case 22: if (spans) --spans; res = strInsert(res, pos, "</span>"); break;
                    case 23: if (spans) --spans; res = strInsert(res, pos, "</span>"); break;
                    case 25: if (spans) --spans; res = strInsert(res, pos, "</span>"); break;
                    case 27: if (spans) --spans; res = strInsert(res, pos, "</span>"); break;
                    case 28: if (spans) --spans; res = strInsert(res, pos, "</span>"); break;
                    // fg colors
                    case 39: res = strInsert(res, pos, '<span class="fgdefault">'); ++spans; break;
                    case 30: res = strInsert(res, pos, '<span class="fgblack">'); ++spans; break;
                    case 31: res = strInsert(res, pos, '<span class="fgred">'); ++spans; break;
                    case 32: res = strInsert(res, pos, '<span class="fggreen">'); ++spans; break;
                    case 33: res = strInsert(res, pos, '<span class="fgyellow">'); ++spans; break;
                    case 34: res = strInsert(res, pos, '<span class="fgblue">'); ++spans; break;
                    case 35: res = strInsert(res, pos, '<span class="fgmagenta">'); ++spans; break;
                    case 36: res = strInsert(res, pos, '<span class="fgcyan">'); ++spans; break;
                    case 37: res = strInsert(res, pos, '<span class="fglightgrey">'); ++spans; break;
                    case 90: res = strInsert(res, pos, '<span class="fgdarkgrey">'); ++spans; break;
                    case 91: res = strInsert(res, pos, '<span class="fglightred">'); ++spans; break;
                    case 92: res = strInsert(res, pos, '<span class="fglightgreen">'); ++spans; break;
                    case 93: res = strInsert(res, pos, '<span class="fglightyellow">'); ++spans; break;
                    case 94: res = strInsert(res, pos, '<span class="fglightblue">'); ++spans; break;
                    case 95: res = strInsert(res, pos, '<span class="fglightmagenta">'); ++spans; break;
                    case 96: res = strInsert(res, pos, '<span class="fglightcyan">'); ++spans; break;
                    case 97: res = strInsert(res, pos, '<span class="fgwhite">'); ++spans; break;
                    // bg colors
                    case 49: res = strInsert(res, pos, '<span class="bgdefault">'); ++spans; break;
                    case 40: res = strInsert(res, pos, '<span class="bgblack">'); ++spans; break;
                    case 41: res = strInsert(res, pos, '<span class="bgred">'); ++spans; break;
                    case 42: res = strInsert(res, pos, '<span class="bggreen">'); ++spans; break;
                    case 43: res = strInsert(res, pos, '<span class="bgyellow">'); ++spans; break;
                    case 44: res = strInsert(res, pos, '<span class="bgblue">'); ++spans; break;
                    case 45: res = strInsert(res, pos, '<span class="bgmagenta">'); ++spans; break;
                    case 46: res = strInsert(res, pos, '<span class="bgcyan">'); ++spans; break;
                    case 47: res = strInsert(res, pos, '<span class="bglightgrey">'); ++spans; break;
                    case 100: res = strInsert(res, pos, '<span class="bgdarkgrey">'); ++spans; break;
                    case 101: res = strInsert(res, pos, '<span class="bglightred">'); ++spans; break;
                    case 102: res = strInsert(res, pos, '<span class="bglightgreen">'); ++spans; break;
                    case 103: res = strInsert(res, pos, '<span class="bglightyellow">'); ++spans; break;
                    case 104: res = strInsert(res, pos, '<span class="bglightblue">'); ++spans; break;
                    case 105: res = strInsert(res, pos, '<span class="bglightmagenta">'); ++spans; break;
                    case 106: res = strInsert(res, pos, '<span class="bglightcyan">'); ++spans; break;
                    case 107: res = strInsert(res, pos, '<span class="bgwhite">'); ++spans; break;
                    
                }
            });
        } else {
            break;
        }
    }
    for (;spans;--spans) res += "</span>";
    console.log(res);
    return res.replace(/\r\r\n/g, '\n');
}

function ascii(txt) {
    var res = "";
    for (i=0; i<txt.length; ++i) {
        if (res) res += ",";
        res += txt.charCodeAt(i).toString();
    }
    return res;
}

function bash_data(data) {
    console.log("->rcv bash-data("+data.name+")", data);
    if (data.type=='done') {
        $("#screen").append('<span class="'+data.type+'">\nDONE</span>');
    } else {
        var buff = "";
        console.log("ASCII: ", ascii(data.text));
        for (var i=0; i<data.text.length; ++i) {
            switch (data.text.charCodeAt(i)) {
            case 7:
            case 8:
                if (buff.length) $("#screen").append(ansifilter(htmlenc(buff)));
                buff = "";
                $('#screen').html(function (_,txt) {
                    return txt.slice(0, -1);
                });
                break;
            default: buff += data.text[i];
            }
        }
        if (buff.length) $("#screen").append(ansifilter(htmlenc(buff)));
    }
    $("#screen").animate({
        scrollTop: $("#screen").prop('scrollHeight')
    }, 500);
    $("#screen").focus();
}

function overview() {
    focused = null;
    showviz(docker.containers.graph());
}

/// Initial Function: Startup
/** Decide whether to login or to create a new user */
function start() {
    $("#imagetools").hide();
    $("#close").hide();
    $("#popup").hide();
    $("#menu").hide();
    $("#username").html(window.location.hostname)
    try {
        status("Starting up ...");
        emit("images");
        emit("containers");
        showImage();
    } catch (m) {
        error(m);
    }
}

function init() {
    socket.io
        .on("connect", connected)
        .on("reconnect", connected)
        .on("disconnect", disconnected)
        .on("error", disconnected);
    socket
        .on("fail", error)
        .on("containers", containers)
        .on("images", images)
        .on("stats", stats)
        .on("logs", logs)
        .on("bash-data", bash_data);
    start();
}

/// On Load, Call @ref start
/*
 $(window.onbeforeunload = function() {
    return "Are you sure you want to navigate away?";
});
 */
$(init);