/*jslint onevar: false, browser: true, evil: true, laxbreak: true, undef: true, nomen: true, eqeqeq: true, bitwise: true, maxerr: 1000, immed: false, white: false, plusplus: false, regexp: false, undef: false */
// Released under the MIT/X11 license
// http://www.opensource.org/licenses/mit-license.php
"use strict";
var util = require("util");
var apiUtils = require("api-utils");
var simpleStorage = require("simple-storage");
var preferences = require("preferences-service");
var Color = require("color").Color;

var TriagedDistro = 13;
var NumberOfFrames = 7;
var bugURL = "https://bugzilla.redhat.com/show_bug.cgi?id=";

// ====================================================================================
// BZPage's methods
var BZPage = function BZPage(win, config) {
    var keys = "";
    for (var key in config) {
        keys += key + ", ";
    }
    console.log("config keys = " + keys);

    // constants
    this.SalmonPink = new Color(255, 224, 176); // RGB 255, 224, 176; HSL 36, 2,
                                                // 85
    this.ReporterColor = new Color(255, 255, 166); // RGB 255, 255, 166; HSL 60, 2,
                                                   // 83
    // initialize dynamic properties
    this.win = win;
    this.doc = win.document;
    this.packages = this.getInstalledPackages(config);

    if ("commentStrings" in config.gJSONData) {
        this.commentStrings = config.gJSONData.commentStrings;
    }

    if ("constantData" in config.gJSONData) {
        this.constantData = config.gJSONData.constantData;
    }

    if ("CCmaintainer" in config.gJSONData.constantData) {
        this.defBugzillaMaintainerArr = config.gJSONData.constantData.CCmaintainer;
    }

    if ("suspiciousComponents" in config.gJSONData.configData) {
        this.suspiciousComponents = config.gJSONData.configData.suspiciousComponents;
    }

    if ("submitsLogging" in config.gJSONData.configData &&
        config.gJSONData.configData.submitsLogging) {
        this.log = config.logger;
        console.log("length of this.log.store = " + this.log.getLength());
        this.setUpLogging();
    }

    this.submitHandlerInstalled = false;
    this.bugNo = util.getBugNo(this.doc.location.toString());

    this.reporter = this.getReporter();
    this.product = this.getOptionValue("product");
    this.component = this.getOptionValue("component");
    this.version = this.getVersion();
    this.title = this.doc.getElementById("short_desc_nonedit_display").textContent;
    this.CCList = this.getCCList();

    // Prepare for query buttons
    // FIXME getting null for commentArea sometimes
    var commentArea = this.doc.getElementById("comment_status_commit");
    if (commentArea) {
        var brElementPlacer = commentArea.getElementsByTagName("br");
        brElementPlacer = brElementPlacer[0];
        if (brElementPlacer) {
            brElementPlacer.setAttribute("id","brElementPlacer_location");
            brElementPlacer.parentNode.insertBefore(this.doc.createElement("br"),
                brElementPlacer);
        }
    } else {
        console.log("Cannot find element with 'comment_status_commit' ID!");
    }

    this.generateButtons();
};

/**
 * Get the ID of the bug.
 *
 * @return string
 */
BZPage.prototype.getBugId = function getBugId () {
    return util.getBugNo(this.doc.location.href);
};

/**
 *
 */
BZPage.prototype.getInstalledPackages = function getInstalledPackages(cfg) {
    var installedPackages = {};

    if (cfg.gJSONData && ("commentPackages" in cfg.gJSONData)) {
        // TODO: Temporary hack ... should be replaced by a proper configuration
        // when replacement for jetpack.storage.settings lands
        var enabledPackages = cfg.gJSONData.configData.enabledPacks.split(/[, ]/);
        enabledPackages.forEach(function (pkg, idx, arr) {
            if (pkg in cfg.gJSONData.commentPackages) {
                installedPackages[pkg] = cfg.gJSONData.commentPackages[pkg];
            }
        });
    }
    return installedPackages;
};

/**
 * Actual execution function
 *
 * @param cmdLabel String with the name of the command to be executed
 * @param cmdParams Object with the appropriate parameters for the command
 */
BZPage.prototype.centralCommandDispatch = function centralCommandDispatch (cmdLabel, cmdParams) {
    switch (cmdLabel) {
        case "resolution":
        case "product":
        case "component":
        case "version":
        case "priority":
            this.selectOption(cmdLabel, cmdParams);
            break;
        case "status":
            this.selectOption("bug_status", cmdParams);
            break;
        case "platform":
            this.selectOption("rep_platform", cmdParams);
            break;
        case "os":
            this.selectOption("op_sys", cmdParams);
            break;
        case "severity":
            this.selectOption("bug_severity", cmdParams);
            break;
        case "target":
            this.selectOption("target_milestone", cmdParams);
            break;
        case "addKeyword":
            this.addStuffToTextBox("keywords",cmdParams);
            break;
        case "removeKeyword":
            this.removeStuffFromTextBox("keywords", cmdParams);
            break;
        case "addWhiteboard":
            this.addStuffToTextBox("status_whiteboard",cmdParams);
            break;
        case "removeWhiteboard":
            this.removeStuffFromTextBox("status_whiteboard",cmdParams);
            break;
        case "assignee":
            this.changeAssignee(cmdParams);
            break;
        case "qacontact":
            this.clickMouse("bz_qa_contact_edit_action");
            this.doc.getElementById("qa_contact").value = cmdParams;
            break;
        case "url":
            this.clickMouse("bz_url_edit_action");
            this.doc.getElementById("bug_file_loc").value = cmdParams;
            break;
        // TODO dependson/blocked doesn't work. Find out why.
        case "addDependsOn":
            this.clickMouse("dependson_edit_action");
            this.addStuffToTextBox("dependson", cmdParams);
            break;
        case "removeDependsOn":
            this.clickMouse("dependson_edit_action");
            this.removeStuffFromTextBox("dependson", cmdParams);
            break;
        case "addBlocks":
            this.clickMouse("blocked_edit_action");
            this.addStuffToTextBox("blocked", cmdParams);
            break;
        case "removeBlocks":
            this.clickMouse("blocked_edit_action");
            this.removeStuffFromTextBox("blocked", cmdParams);
            break;
        case "comment":
            this.addStuffToTextBox("comment", cmdParams);
            break;
        case "commentIdx":
            var commentText = this.commentStrings[cmdParams];
            this.addStuffToTextBox("comment", commentText);
            break;
        case "setNeedinfo":
            // cmdParams are actually ignored for now; we may in future
            // distinguish different actors to be target of needinfo
            this.setNeedinfoReporter();
            break;
        case "addCC":
            this.addToCCList(cmdParams);
            break;
        // TODO flags, see also

        case "commit":
            if (cmdParams) {
                // Directly commit the form
                this.doc.forms.namedItem("changeform").submit();
            }
            break;
    }
};

/**
 * Take the ID of the package/id combination, and execute it
 *
 * @param String combined package + "//" + id combination
 * Fetches the command object from this.installedPackages and then
 * goes through all commands contained in it, and calls
 * this.centralCommandDispatch to execute them.
 */
BZPage.prototype.executeCommand = function executeCommand (cmd) {
    var cmdArr = cmd.split("//");
    var commentObj = this.packages[cmdArr[0]][cmdArr[1]];

    for (var key in commentObj) {
        this.centralCommandDispatch(key,commentObj[key]);
    }
};

/**
 * Add XGL to the CC list
 *
 * @param evt Event which made this function active
 * @return none
 */
BZPage.prototype.changeAssignee = function changeAssignee (newAssignee) {
    var defAssigneeButton = null;
    this.addToCCList(this.owner);
    if (newAssignee === null) {
        this.doc.getElementById("set_default_assignee").removeAttribute(
            "checked");
        return ;
    }

    if (this.getDefaultAssignee) {
        if (newAssignee === "default") {
            var defAss = this.getDefaultAssignee();
            if (defAss) {
                newAssignee = defAss;
            } else {
                return ;
            }
        }
    }

    if (newAssignee) {
        this.clickMouse("bz_assignee_edit_action");
        this.doc.getElementById("assigned_to").value = newAssignee;
        this.doc.getElementById("set_default_assignee").checked = false;
        defAssigneeButton = this.doc.getElementById("setDefaultAssignee_btn");
        if (defAssigneeButton) {
            defAssigneeButton.style.display = "none";
        }
    }
};

/**
 * Adds new option to the 'comment_action' scroll down box
 *
 * @param pkg String package name
 * @param cmd String with the name of the command
 * If the 'comment_action' scroll down box doesn't exist, this
 * function will set up new one.
 */
BZPage.prototype.addToCommentsDropdown = function addToCommentsDropdown (pkg, cmd) {
    var select = this.doc.getElementById("comment_action");
    if (!select) {
        var that = this;
        this.doc.getElementById("comments").innerHTML +=
            "<div id='make_bugzilla_comment_action'>" +
            "  <label for='comment_action'>Add Comment: </label>" +
            "  <select id='comment_action'>" +
            "    <option value=''>-- Select Comment from List --</option>" +
            "</div>";
        select = this.doc.getElementById("comment_action");
        select.addEventListener("change", function () {
            var value = "";
            var valueElement = that.doc.getElementById("comment_action");
            if (valueElement) {
                value = valueElement.getAttribute("value");
            } else {
                return;
            }
            that.executeCommand(value);
        }, false);
    }

    var opt = this.doc.createElement("option");
    opt.value = pkg + "//" + cmd;
    opt.textContent = this.packages[pkg][cmd].name;
    select.appendChild(opt);
};

/**
 * Generic function to add new button to the page. Actually copies new button
 * from the old one (in order to have the same look-and-feel, etc.
 *
 * @param location Object around which the new button will be added
 * @param after Boolean before or after location ?
 * @param pkg String which package to take the command from
 * @param id String which command to take
 * @return none
 */
BZPage.prototype.createNewButton = function createNewButton (location, after, pkg, id) {
    var that = this;
    var cmdObj = this.packages[pkg][id];
    var newId = id + "_btn";
    var label = cmdObj.name;

    // protection against double-firings
    if (this.doc.getElementById(newId)) {
        console.log("Element with id " + newId + "already exists!");
        return ;
    }

    // creation of button might be conditional on existence of data in constantData
    if ("ifExist" in cmdObj) {
        if (!(cmdObj.ifExist in this.constantData)) {
            return ;
        }
    }

    var newButton = this.doc.createElement("input");
    newButton.setAttribute("id", newId);
    newButton.setAttribute("type", "button");
    newButton.value = label;
    newButton.addEventListener("click", function(evt) {
        that.executeCommand(pkg + "//" + id);
    }, false);

    var originalLocation = this.doc.getElementById(location);

    if (after) {
        originalLocation.parentNode.insertBefore(newButton,
                originalLocation.nextSibling);
        originalLocation.parentNode.insertBefore(this.doc
                .createTextNode("\u00A0"), newButton);
    } else {
        originalLocation.parentNode.insertBefore(newButton, originalLocation);
        originalLocation.parentNode.insertBefore(this.doc
                .createTextNode("\u00A0"), originalLocation);
    }
};

/**
 *
 */
BZPage.prototype.generateButtons = function generateButtons () {
    var topRowPosition = "topRowPositionID";
    var bottomRowPosition = "commit";

    // create anchor for the top toolbar
    var commentBox = this.doc.getElementById("comment");
    var brElement = this.doc.createElement("br");
    brElement.setAttribute("id",topRowPosition);
    commentBox.parentNode.normalize();
    commentBox.parentNode.insertBefore(brElement, commentBox);

    for (var pkg in this.packages) {
        for (var cmdIdx in this.packages[pkg]) {
            var cmdObj = this.packages[pkg][cmdIdx];
            switch (cmdObj.position) {
                case "topRow":
                    this.createNewButton(topRowPosition, false, pkg, cmdIdx);
                    break;
                case "bottomRow":
                    this.createNewButton(bottomRowPosition, false, pkg, cmdIdx);
                    break;
                case "dropDown":
                    this.addToCommentsDropdown(pkg,cmdIdx);
                    break;
                default: // [+-]ID
                    var firstChr = cmdObj.position.charAt(0);
                    var newId = cmdObj.position.substr(1);
                    this.createNewButton(newId, firstChr === "+", pkg, cmdIdx);
                    break;
            }
        }
    }
};

/**
 * Get the current email of the reporter of the bug.
 *
 * @return string
 */
BZPage.prototype.getReporter = function getReporter () {
    var reporterElement = this.doc.
        querySelector("#bz_show_bug_column_2 > table .vcard:first-of-type > a");
    if (reporterElement) {
        return reporterElement.textContent;
    }
    return "";
};

/**
 * Get the current version of the Fedora release ... even if changed meanwhile
 * by bug triager.
 *
 * @return string (integer for released Fedora, float for RHEL, rawhide)
 */
BZPage.prototype.getVersion = function getVersion () {
    var verStr = this.getOptionValue("version").toLowerCase();
    var verNo = 0;
    if (/rawhide/.test(verStr)) {
        verNo = 999;
    } else {
        verNo = Number(verStr);
    }
    return verNo;
};

BZPage.prototype.commentsWalker = function commentsWalker (fce) {
    var comments = this.doc.getElementById("comments").getElementsByClassName(
            "bz_comment");
    Array.forEach(comments, function(item) {
        fce(item);
    }, this);
};

/**
 * Set background color of all comments made by reporter in ReporterColor color
 *
 */
BZPage.prototype.checkComments = function checkComments () {
    var that = this;
    this.commentsWalker(function(x) {
        var email = x.getElementsByClassName("vcard")[0]
                .getElementsByTagName("a")[0].textContent;
        if (new RegExp(that.reporter).test(email)) {
            x.style.backgroundColor = that.ReporterColor.toString();
        }
    });
};

BZPage.prototype.collectComments = function collectComments () {
    var outStr = "";
    this.commentsWalker(function(x) {
        outStr += x.getElementsByTagName("pre")[0].textContent + "\n";
    });
    return outStr.trim();
};


/**
 * Select option with given label on the <SELECT> element with given id.
 *
 * Also execute change HTMLEvent, so that the form behaves accordingly.
 *
 * @param id
 * @param label
 * @return none
 *
 * FIXME bugzilla-comments version has this signature:
 * selectOption = function selectOption(select, value) {
       var doc = select[0].ownerDocument;
       select.val(value);
 */
BZPage.prototype.selectOption = function selectOption (id, label) {
    var sel = this.doc.getElementById(id);
    sel.value = label;
    var intEvent = this.doc.createEvent("HTMLEvents");
    intEvent.initEvent("change", true, true);
    sel.dispatchEvent(intEvent);
};

/**
 * Send mouse click to the specified element
 *
 * @param String ID of the element to send mouseclick to
 * @return None
 */
BZPage.prototype.clickMouse = function clickMouse (targetID) {
    var localEvent = this.doc.createEvent("MouseEvents");
    localEvent.initMouseEvent("click", true, true, this.doc.defaultView, 0, 0,
            0, 0, 0, false, false, false, false, 0, null);
    this.doc.getElementById(targetID).dispatchEvent(localEvent);
};

/**
 * Add object to the text box (comment box or status whiteboard)
 *
 * @param id String with the id of the element
 * @param stuff String/Array to be added to the comment box
 *
 * @return none
 */
BZPage.prototype.addStuffToTextBox = function addStuffToTextBox (id, stuff) {
    var textBox = this.doc.getElementById(id);
    if (textBox.tagName.toLowerCase() === "textarea") {
        stuff = textBox.value ? "\n\n" + stuff : stuff;
        textBox.value += stuff;
    } else {
        textBox.value = util.addCSVValue(textBox.value,stuff);
    }
};

/**
 * Remove a keyword from the element if it is there
 *
 * @param id String with the id of the element
 * @param stuff String/Array with keyword(s) to be removed
 */
BZPage.prototype.removeStuffFromTextBox = function removeStuffFromTextBox (id, stuff) {
    var changedElement = this.getElementById(id);
    changedElement.value = util.removeCSVValue(changedElement.value,stuff);
};

/**
 * generalized hasKeyword ... search in the value of the box with given id
 *
 * @param id String with ID of the element we want to check
 * @param str String to be searched for
 * @return Boolean found?
 */
BZPage.prototype.idContainsWord = function idContainsWord (id, str) {
    var kwd = "";
    try {
        kwd = this.doc.getElementById(id).value;
    } catch (e) {
        // For those who don't have particular element at all or if it is empty
        return false;
    }
    return (kwd.trim().indexOf(str) !== -1);
};

/**
 * Check for the presence of a keyword
 *
 * @param str String with the keyword
 * @return Boolean
 */
BZPage.prototype.hasKeyword = function hasKeyword (str) {
    return (this.idContainsWord('keywords', str));
};

/**
 *
 */
BZPage.prototype.getOptionValue = function getOptionValue (id) {
    // Some special bugs don't have version for example
    var element = this.doc.getElementById(id);
    if (element) {
        return element.value;
    } else {
        console.error("Failed to find element with id = " + id);
        return "#NA";
    }
};

/**
 * Set the bug to NEEDINFO state
 *
 * Working function.
 * @return none
 * @todo TODO we may extend this to general setNeedinfo function
 * with parameter [reporter|assignee|general-email-address]
 */
BZPage.prototype.setNeedinfoReporter = function setNeedinfoReporter () {
    this.clickMouse("needinfo");
    this.selectOption("needinfo_role", "reporter");
};

/**
 *
 */
BZPage.prototype.getOwner = function getOwner () {
    var priorityParent = this.doc.querySelector("label[for~='target_milestone']")
        .parentNode.parentNode.parentNode;
    var assigneeAElement = priorityParent.querySelector("tr:nth-of-type(1) a.email");
    var assgineeHref = decodeURI(assigneeAElement.getAttribute("href"));
    var email = assgineeHref.split(":")[1];
    return email;
};

/**
 * Get login of the currently logged-in user.
 *
 * @return String with the login name of the currently logged-in user
 */
BZPage.prototype.getLogin = function getLogin () {
    var lastLIElement = this.doc.querySelector("#header ul.links li:last-of-type");
    var loginArr = lastLIElement.textContent.split("\n");
    var loginStr = loginArr[loginArr.length - 1].trim();
    return loginStr;
};

/**
 * Return maintainer which is per default by bugzilla
 * (which is not necessarily the one who is default maintainer per component)
 *
 * @return String with the maintainer's email address
 */
BZPage.prototype.getDefaultBugzillaMaintainer = function getDefaultBugzillaMaintainer (component) {
    var address = util.filterByRegexp(this.defBugzillaMaintainerArr, component);
    return address;
};

/**
 * collect the list of attachments in a structured format
 *
 * @return Array of arrays, one for each attachments;
 * each record has string name of the attachment, integer its id number,
 *         string of MIME type, integer of size in kilobytes, and the whole
 *         element itself
 */
BZPage.prototype.getAttachments = function getAttachments () {
    var outAtts = [];
    var atts = this.doc.getElementById("attachment_table")
            .getElementsByTagName("tr");
    for ( var i = 1, ii = atts.length - 1; i < ii; i++) {
        outAtts.push(this.parseAttachmentLine(atts[i]));
    }
    return outAtts;
};

/**
 * returns password from the current storage, or if there isn't
 * one, then it will ask user for it.
 *
 * @return String with the password
 */
BZPage.prototype.getPassword = function getPassword () {
    if (preferences.isSet("BZpassword")) {
        return preferences.get("BZpassword",undefined);
    } else {
        var passwordText = util.getPassword();
        if (passwordText) {
            preferences.set("BZpassword", passwordText);
        }
    }
};

/**
 *
 */
BZPage.prototype.setUpLogging = function setUpLogging () {
    // Protection against double-call
    if (this.doc.getElementById("generateTSButton")) {
        console.log("Logging has been already set up!");
        return ;
    }

    // For adding additional buttons to the top toolbar
    var additionalButtons = this.doc.querySelector("#bugzilla-body *.related_actions");
    var that = this;

    // logging all submits for timesheet
    // FIXME we should merge in functionality of RHBugzillaPage.submitCallback
    // and actually make it working
    // Maybe rewriting whole offline capability into a separate object?
    if (!this.submitHandlerInstalled) {
        console.log("Installing submit callback!");
        this.doc.forms.namedItem("changeform").addEventListener("submit",function (evt) {
            console.log("Submit callback!");

            var resp = that.log.addLogRecord(that);
            if (resp === null) {
                console.log("Avoiding submitting!");
                // FIXME doesn't work ... still submitting'
                evt.stopPropagation();
                evt.preventDefault();
            }
        }, false);
        this.submitHandlerInstalled = true;
    }

    var generateTimeSheetUI = this.doc.createElement("li");
    generateTimeSheetUI.innerHTML = "\u00A0-\u00A0<a href='#' id='generateTSButton'>"
            + "Generate timesheet</a>";
    additionalButtons.appendChild(generateTimeSheetUI);
    this.doc.getElementById("generateTSButton").addEventListener(
            "click",
            function(evt) {
                that.log.createBlankPage.call(that.log, "TimeSheet",
                        that.log.generateTimeSheet);
                evt.stopPropagation();
                evt.preventDefault();
            }, false);

    var clearLogsUI = this.doc.createElement("li");
    clearLogsUI.innerHTML = "\u00A0-\u00A0<a href='#' id='clearLogs'>"
            + "Clear logs</a>";
    additionalButtons.appendChild(clearLogsUI);
    var clearLogAElem = this.doc.getElementById("clearLogs");
    clearLogAElem.addEventListener("click", function() {
        that.log.store = {};
        this.style.color = that.log.EmptyLogsColor;
        this.style.fontWeight = "normal";
        console.log("this.store wiped out!");
    }, false);

    if (this.log.store.length > 0) {
        clearLogAElem.style.color = this.log.FullLogsColor;
        clearLogAElem.style.fontWeight = "bolder";
    } else {
        clearLogAElem.style.color = this.log.EmptyLogsColor;
        clearLogAElem.style.fontWeight = "normal";
    }
};

/**
 * adds a person to the CC list, if it isn't already there
 *
 * @param who String with email address or "self" if the current user
 * of the bugzilla should be added
 */
BZPage.prototype.addToCCList = function addToCCList (who) {
    if (!who) {
        return ;
    }
    if (who === "self") {
        this.doc.getElementById("addselfcc").checked = true;
    } else {
        this.clickMouse("cc_edit_area_showhide");
        if (!util.isInList(who, this.CCList)) {
            this.addStuffToTextBox("newcc",who);
        }
    }
};

/**
 * a collect a list of emails on CC list
 *
 * @return Array with email addresses as Strings.
 */
BZPage.prototype.getCCList = function getCCList () {
    var CCListSelect = this.doc.getElementById("cc");
    outCCList = [];
    if (CCListSelect) {
        outCCList = Array.map(CCListSelect.options, function(item) {
            return item.value;
        });
    }
    return outCCList;
};

// exports.BZPage = apiUtils.publicConstructor(BZPage);
exports.BZPage = BZPage;