$(document).ready(function() {
    $('label').popover();
});

/**
 * Launches the parsing process by calling the parser with the data entered in the interface,
 * and processing the results.
 */
function parse() {
    var textToParse = $("#lojban-text-area").val();
    $("#result-row").slideDown();
    try {
        var start = new Date().getTime();
        var parse = camxes.parse(textToParse);
        var end = new Date().getTime();
        $("#time-label").html("(parsing took " + (end - start) + " ms)");
        parse = remove_morphology(parse);
        parse = remove_spaces(parse);
        var simplified = simplifyTree(parse);
        numberSumti(simplified);
        
        if (parse) {
            tokens = [];
            findTokens(parse, tokens);
            
            var $parseResultHighlighted = $("#parse-result-highlighted");
            showHighlighting(simplified[0], tokens, $parseResultHighlighted);
            
            var $parseResultRaw = $("#parse-result-raw");
            showRawTree(parse, $parseResultRaw);
            
            var $parseResultTree = $("#parse-result-tree");
            showParseTree(parse, $parseResultTree);
            
            var $parseResultSimplified = $("#parse-result-simplified");
            showSimplifiedTree(simplified, $parseResultSimplified);
            
            var $parseResultBoxes = $("#parse-result-boxes");
            showBoxes(simplified, $parseResultBoxes);
            
            var $parseResultGlossing = $("#parse-result-glossing");
            showGlossing(tokens, $parseResultGlossing);
        }
        $("#parse-result-highlighted-tab").html("Highlighted");
        $("#parse-result-tree-tab").html("Parse tree");
        $("#parse-result-raw-tab").html("Raw tree");
        $("#parse-result-simplified-tab").html("Simplified tree");
        $("#parse-result-boxes-tab").html("Boxes");
        $("#parse-result-glossing-tab").html("Glosses");
    } catch (e) {
        if (e.name && e.name === "SyntaxError") {
            $("#parse-result-highlighted-tab").html("<span class=\"muted\">Highlighted</span>");
            showSyntaxError(e, textToParse, $("#parse-result-highlighted"));
            $("#parse-result-raw-tab").html("<span class=\"muted\">Raw tree</span>");
            showSyntaxError(e, textToParse, $("#parse-result-raw"));
            $("#parse-result-simplified-tab").html("<span class=\"muted\">Simplified tree</span>");
            showSyntaxError(e, textToParse, $("#parse-result-simplified"));
            $("#parse-result-tree-tab").html("<span class=\"muted\">Parse tree</span>");
            showSyntaxError(e, textToParse, $("#parse-result-tree"));
            $("#parse-result-boxes-tab").html("<span class=\"muted\">Boxes</span>");
            showSyntaxError(e, textToParse, $("#parse-result-boxes"));
            $("#parse-result-glossing-tab").html("<span class=\"muted\">Glosses</span>");
            showSyntaxError(e, textToParse, $("#parse-result-glossing"));
        } else {
            throw e;
        }
    }
}

/**
 * Finds all tokens in the resulting parse tree, and puts them in the tokens array.
 */
function findTokens(parse, tokens) {
    
    if (parse instanceof Array) {
        if (parse.length == 2 && isString(parse[0]) && isString(parse[1])) {
            tokens.push(parse[1]);
        } else {
            for (child in parse) {
                findTokens(parse[child], tokens);
            }
        }
    }
}

/**
 * Shows the parse result in the interface.
 */
function showRawTree(parse, $element) {
    $element.html("<pre>" + JSON.stringify(parse, undefined, 2) + "</pre>");
}

/**
 * Shows the parse result in the interface.
 */
function showParseTree(parse, $element) {
    $element.html(constructParseTreeOutput(parse, 0));
}

function constructParseTreeOutput(parse, depth) {
    
    // precaution against infinite recursion; this should not actually happen of course
    if (depth > 50) {
        return "<b>too much recursion :-(</b>";
    }
    
    // if we get null, just print that
    if (parse === null) {
        return "<i>(none?)</i>";
    }
    
    // if we get undefined, just print that
    if (!parse) {
        return "<i>(undefined?)</i>";
    }
    
    if (parse instanceof Array) {
        
        if (parse.length == 0) {
            return "<i>(empty array?)</i>";
        }
        
        var output = "";
        
        // what is the type of parse[0]?
        if (isString(parse[0])) {
            // it is the type
            output += parse[0] + ":";
            
            if (isString(parse[1])) {
                // a literal
                output += "<b> [" + getVlasiskuLink(parse[1]) + "]</b>";
                if (shortDescriptions[parse[1]]) {
                    output += " <span class=\"translation\">" + shortDescriptions[parse[1]] + "</span>";
                }
                return output;
            }
            
            output += "<ul>";
            for (var child in parse) {
                if (child !== "0") {
                    output += "<li>" + constructParseTreeOutput(parse[child], depth + 1) + "</li>";
                }
            }
            output += "</ul>";
            return output;
        } else {
            output += "<i>a list:</i>";
            output += "<ol>";
            for (var child in parse) {
                output += "<li>" + constructParseTreeOutput(parse[child], depth + 1) + "</li>";
            }
            output += "</ol>";
            return output;
        }
    
        return "<i>(huh 2?)</i>";
    }
    
    return "<i>(huh? " + parse + ")</i>";
}

/**
 * Shows the simplified parse tree in the interface.
 */
function showSimplifiedTree(simplified, $element) {
    $element.html(constructSimplifiedTreeOutput(simplified[0], 0));
}

function constructSimplifiedTreeOutput(parse, depth) {
    
    // precaution against infinite recursion; this should not actually happen of course
    if (depth > 50) {
        return "<b>too much recursion :-(</b>";
    }
    
    // if we get null, just print that
    if (parse === null) {
        return "<i>(none?)</i>";
    }
    
    // if we get undefined, just print that
    if (!parse) {
        return "<i>(undefined?)</i>";
    }
    
    var output = parse.type;
    if (parse.sumtiPlace) {
        output += parse.sumtiPlace;
    }
    
    if (parse.word) {
        
        // we have a terminal
        output += " <b>[" + getVlasiskuLink(parse.word) + "]</b>";
        if (shortDescriptions[parse.word]) {
            output += " <span class=\"translation\">" + shortDescriptions[parse.word] + "</span>";
        }
        
    } else {
        
        // we have a non-terminal
    
        output += "<ul>";

        for (var child in parse.children) {
            output += "<li>";
            output += constructSimplifiedTreeOutput(parse.children[child], depth + 1);
            output += "</li>";
        }
    
        output += "</ul>";
    }
    
    return output;
}

/**
 * Shows the boxes in the interface.
 */
function showBoxes(simplified, $element) {
    
    var output = "";
    
    output += constructBoxesOutput(simplified[0], 0);
    
    /*output += "<p>Legend: ";
    var types = ["sentence", "prenex", "selbri", "sumti"];
    for (var type in types) {
        output += "<div class=\"" + boxClassForType({ type: types[type] }) + "\">" + types[type] + "</div>";
    }
    output += "</p>";*/
    
    $element.html(output);
}

function constructBoxesOutput(parse, depth) {
    
    // precaution against infinite recursion; this should not actually happen of course
    if (depth > 50) {
        return "<b>too much recursion :-(</b>";
    }
    
    // if we get null, just print that
    if (parse === null) {
        return "<i>(none?)</i>";
    }
    
    // if we get undefined, just print that
    if (!parse) {
        return "<i>(undefined?)</i>";
    }
    
    var output = "";
    
    if (parse.word) {
        
        output += "<div class=\"box box-terminal\">";
        
        // we have a terminal
        output += "&nbsp;<b>" + getVlasiskuLink(parse.word) + "</b>&nbsp;<br>";
        output += "&nbsp;" + parse.type + "&nbsp;<br>";
        if (shortDescriptions[parse.word]) {
            output += "<span class=\"translation\">&nbsp;" + shortDescriptions[parse.word] + "&nbsp;</span>";
        } else {
            output += "...";
        }
        
        output += "</div>";
        
    } else {
        
        // we have a non-terminal
        
        output += "<div class=\"" + boxClassForType(parse) + "\">";
        
        for (var child in parse.children) {
            output += constructBoxesOutput(parse.children[child], depth + 1);
        }
        
        if (boxClassForType(parse) !== "box box-not-shown") {
            output += "<br>" + parse.type;
            if (parse.sumtiPlace) {
                output += parse.sumtiPlace;
            }
        }
        
        output += "</div>";
    }
    
    return output;
}

function boxClassForType(parse) {
    
    if (parse.type === "sentence") {
        return "box box-sentence";
    }
    
    if (parse.type === "sumti x") {
        if (parse.sumtiPlace > 5) {
            return "box box-sumti6";
        } else if (parse.sumtiPlace == "fai") {
            return "box box-sumti-fai";
        } else {
            return "box box-sumti" + parse.sumtiPlace;
        }
    }
    
    if (parse.type === "modal sumti") {
        return "box box-modal";
    }
    
    if (parse.type === "sumti") {
        return "box box-sumti";
    }
    
    if (parse.type === "selbri") {
        return "box box-selbri";
    }
    
    if (parse.type === "prenex") {
        return "box box-prenex";
    }
    
    return "box box-not-shown";
}

/**
 * Shows a syntax error in the interface.
 */
function showSyntaxError(e, textToParse, $element) {
    
    var output = "<div class=\"alert\">" +
    "<p><b>Syntax error</b> on line <b>" + 
    e.line +
    "</b>, at column <b>" +
    e.column +
    "</b>: " +
    e.message +
    "</p>" +
    "<p class=\"error-sentence\">" +
    generateErrorPosition(e, textToParse) + 
    "</p>" +
    generateFixes(e) +
    "</div>";
    
    $element.html(output);
}

/**
 * Generates the text sample that shows the error position.
 */
function generateErrorPosition(e, textToParse) {
    
    //"mi vau <span class=\"error-marker\">&#9652;</span> do cusku ..." +
    
    var before = textToParse.substring(e.offset - 20, e.offset);
    
    var after = textToParse.substring(e.offset + 0, e.offset + 20);
    
    if (e.offset > 20) {
        before = "..." + before;
    }
    if (e.offset < textToParse.length - 20) {
        after = after + "...";
    }
    
    return before + "<span class=\"error-marker\">&#9652;</span>" + after;
}

function generateFixes(e) {
    if (!e.fix) {
        //return "<p><i>No quick fixes available.</i></p>";
        return "";
    }
    
    var fixes = "<p>Quick fixes:<ul>";
    
    for (var f in e.fix) {
        var fix = (e.fix)[f];
        fixes += "<li>";
        
        if (fix.fixFunction) {
            fixes += "<a>";
            fixes += fix.name;
            fixes += "</a>";
        } else {
            fixes += fix.name;
        }
        
        fixes += "</li>";
    }
    
    fixes += "</ul></p>";
    
    return fixes;
}

/**
 * Shows the highlighting in the interface.
 */
function showHighlighting(simplified, tokens, $element) {
    
    var output = "";
    
    if ($("#latin-button").hasClass('active')) {
        var mode = 1;
        var classString = "latin-highlighting";
    } else if ($("#cyrillic-button").hasClass('active')) {
        var mode = 2;
        var classString = "cyrillic-highlighting";
    } else if ($("#tengwar-button").hasClass('active')) {
        var mode = 3;
        var classString = "tengwar-highlighting";
    } else if ($("#hiragana-button").hasClass('active')) {
        var mode = 4;
        var classString = "hiragana-highlighting";
    }
    
    output += "<span class=\"highlighting " + classString + "\"><big>";
    output += markupHighlighting(simplified, mode);
    output += "</big></span>";
    
    $element.html(output);
}

function markupHighlighting(simplified, mode) {
    
    var output = "";
    var beforeOutput = "";
    var afterOutput = " ";
        
    if (simplified.type === "selbri") {
        beforeOutput += "<span class=\"lojban-selbri\">";
        afterOutput = "</span> ";
    } else if (simplified.type === "modal sumti") {
        beforeOutput += "<span class=\"lojban-modal\"><sup>m</sup>";
        afterOutput = "</span> ";
    } else if (simplified.type === "sumti x") {
        if (simplified.sumtiPlace > 5) {
            beforeOutput += "<span class=\"lojban-sumti6\"><sup>" + simplified.sumtiPlace + "</sup>";
            afterOutput = "</span> ";
        } else {
            beforeOutput += "<span class=\"lojban-sumti" + simplified.sumtiPlace + "\"><sup>" + simplified.sumtiPlace + "</sup>";
            afterOutput = "</span> ";
        }
    } else if (simplified.type === "prenex") {
        beforeOutput += "<span class=\"lojban-prenex\"><sup>p</sup>";
        afterOutput = "</span> ";
    } else if (simplified.type === "free") {
        beforeOutput += "<span class=\"lojban-vocative\"><sup>v</sup>";
        afterOutput = "</span> ";
    }
    
    if (simplified.word) {
        output += outputWord(simplified.word, mode);
    } else {
        if (beforeOutput === "") {
            for (child in simplified.children) {
                output += markupHighlighting(simplified.children[child], mode);
            }
        } else {
            output += "<span class=\"lojban-nesting\">" + enumerateTokens(simplified, mode) + "</span>";
        }
    }
    
    return beforeOutput + output + afterOutput;
}

function enumerateTokens(simplified, mode) {
    
    var output = "";
    
    if (simplified.word) {
        output += outputWord(simplified.word, mode);
    } else {
        for (child in simplified.children) {
            var textToAdd = enumerateTokens(simplified.children[child], mode);
            if (textToAdd) {
                output += textToAdd + " ";
            }
        }
    }
    
    if (endsWith(output, " ")) {
        output = output.substring(0, output.length - 1);
    }
    
    return output;
}

function isModalSumti(sumti) {
    var tag = sumti[1][0];
    return tag === "tag"; // TODO It would be much nicer to make some methods for walking the parse tree, and using them
}

function markupError(error, before, after) { // TODO
    before[error.position] = "<span class=\"lojban-error\" title=\"" + error.message + "\">" + before[error.position];
    after[error.position] = after[error.position] + "</span>";
}

/**
 * Shows the glossing in the interface.
 */
function showGlossing(text, $element) {
    
    var output = "<dl class=\"dl-horizontal\">";
    
    for (var j = 0; j < text.length; j++) {
        output += "<dt>" + getVlasiskuLink(text[j]) + "</dt>";
        
        if (shortDescriptions[text[j]]) {
            output += "<dd>" + shortDescriptions[text[j]] + "</dd>";
        } else {
            output += "<dd><span class=\"muted\">(?)</span></dd>";
        }
    }
    
    output += "</dl>";
    
    $element.html(output);
}

/**
 * Shows the translation in the interface.
 */
function showTranslation(parse, text, $element) {
    
    var output = "<p class=\"muted\">This translation feature tries to give an approximate translation of the Lojban text into English. However, it does only work for a few sentences as of now. (Try [mi gleki] or something simple like that...)</p>";
    
    //var translation = translate(parse);
    var translation = "Sorry! Translation is switched off at the moment, to prevent crashes in the other parts :-(";
    output += "<center><big>" + translation + "</big></center>";
    
    $element.html(output);
}

// Auxiliary

function isString(s) {
    return typeof(s) === 'string' || s instanceof String;
}

function getVlasiskuLink(word) {
    return "<a href=\"http://vlasisku.lojban.org/vlasisku/" + word + "\">" + outputWord(word, getSelectedMode()) + "</a>";
}

function outputWord(word, mode) {
    if (mode === 1) { // Latin mode
        return addDotsToWord(word);
    } else if (mode === 2) { // Cyrillic mode
        return wordToCyrillic(addDotsToWord(word));
    } else if (mode === 3) { // Tengwar mode
        return wordToTengwar(addDotsToWord(word));
    } else if (mode === 4) { // Hiragana mode
        return wordToHiragana(addDotsToWord(word));
    }
}

function getSelectedMode() {
    if ($("#latin-button").hasClass('active')) {
        return 1;
    } else if ($("#cyrillic-button").hasClass('active')) {
        return 2;
    } else if ($("#tengwar-button").hasClass('active')) {
        return 3;
    } else if ($("#hiragana-button").hasClass('active')) {
        return 4;
    }
}

function endsWith(str, suffix) {
    return str.indexOf(suffix, str.length - suffix.length) !== -1;
}