/* ***** BEGIN LICENSE BLOCK *****
 * Distributed under the BSD license:
 *
 * Copyright (c) 2012, Ajax.org B.V.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Ajax.org B.V. nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ***** END LICENSE BLOCK ***** */

define(function(require, exports, module) {
"use strict";

var Renderer = require("../virtual_renderer").VirtualRenderer;
var Editor = require("../editor").Editor;
var Range = require("../range").Range;
var event = require("../lib/event");
var lang = require("../lib/lang");
var dom = require("../lib/dom");

var $singleLineEditor = function(el) {
    var renderer = new Renderer(el);

    renderer.$maxLines = 4;

    var editor = new Editor(renderer);

    editor.setHighlightActiveLine(false);
    editor.setShowPrintMargin(false);
    editor.renderer.setShowGutter(false);
    editor.renderer.setHighlightGutterLine(false);

    editor.$mouseHandler.$focusWaitTimout = 0;
    editor.$highlightTagPending = true;

    return editor;
};

var AcePopup = function(parentNode) {
    var el = dom.createElement("div");
    var popup = new $singleLineEditor(el);

    if (parentNode)
        parentNode.appendChild(el);
    el.style.display = "none";
    popup.renderer.content.style.cursor = "default";
    popup.renderer.setStyle("ace_autocomplete");

    popup.setOption("displayIndentGuides", false);
    popup.setOption("dragDelay", 150);

    var noop = function(){};

    popup.focus = noop;
    popup.$isFocused = true;

    popup.renderer.$cursorLayer.restartTimer = noop;
    popup.renderer.$cursorLayer.element.style.opacity = 0;

    popup.renderer.$maxLines = 8;
    popup.renderer.$keepTextAreaAtCursor = false;

    popup.setHighlightActiveLine(false);
    // set default highlight color
    popup.session.highlight("");
    popup.session.$searchHighlight.clazz = "ace_highlight-marker";

    popup.on("mousedown", function(e) {
        var pos = e.getDocumentPosition();
        popup.selection.moveToPosition(pos);
        selectionMarker.start.row = selectionMarker.end.row = pos.row;
        e.stop();
    });

    var lastMouseEvent;
    var hoverMarker = new Range(-1,0,-1,Infinity);
    var selectionMarker = new Range(-1,0,-1,Infinity);
    selectionMarker.id = popup.session.addMarker(selectionMarker, "ace_active-line", "fullLine");
    popup.setSelectOnHover = function(val) {
        if (!val) {
            hoverMarker.id = popup.session.addMarker(hoverMarker, "ace_line-hover", "fullLine");
        } else if (hoverMarker.id) {
            popup.session.removeMarker(hoverMarker.id);
            hoverMarker.id = null;
        }
    };
    popup.setSelectOnHover(false);
    popup.on("mousemove", function(e) {
        if (!lastMouseEvent) {
            lastMouseEvent = e;
            return;
        }
        if (lastMouseEvent.x == e.x && lastMouseEvent.y == e.y) {
            return;
        }
        lastMouseEvent = e;
        lastMouseEvent.scrollTop = popup.renderer.scrollTop;
        var row = lastMouseEvent.getDocumentPosition().row;
        if (hoverMarker.start.row != row) {
            if (!hoverMarker.id)
                popup.setRow(row);
            setHoverMarker(row);
        }
    });
    popup.renderer.on("beforeRender", function() {
        if (lastMouseEvent && hoverMarker.start.row != -1) {
            lastMouseEvent.$pos = null;
            var row = lastMouseEvent.getDocumentPosition().row;
            if (!hoverMarker.id)
                popup.setRow(row);
            setHoverMarker(row, true);
        }
    });
    popup.renderer.on("afterRender", function() {
        var row = popup.getRow();
        var t = popup.renderer.$textLayer;
        var selected = t.element.childNodes[row - t.config.firstRow];
        if (selected == t.selectedNode)
            return;
        if (t.selectedNode)
            dom.removeCssClass(t.selectedNode, "ace_selected");
        t.selectedNode = selected;
        if (selected)
            dom.addCssClass(selected, "ace_selected");
    });
    var hideHoverMarker = function() { setHoverMarker(-1) };
    var setHoverMarker = function(row, suppressRedraw) {
        if (row !== hoverMarker.start.row) {
            hoverMarker.start.row = hoverMarker.end.row = row;
            if (!suppressRedraw)
                popup.session._emit("changeBackMarker");
            popup._emit("changeHoverMarker");
        }
    };
    popup.getHoveredRow = function() {
        return hoverMarker.start.row;
    };

    event.addListener(popup.container, "mouseout", hideHoverMarker);
    popup.on("hide", hideHoverMarker);
    popup.on("changeSelection", hideHoverMarker);

    popup.session.doc.getLength = function() {
        return popup.data.length;
    };
    popup.session.doc.getLine = function(i) {
        var data = popup.data[i];
        if (typeof data == "string")
            return data;
        return (data && data.value) || "";
    };

    var bgTokenizer = popup.session.bgTokenizer;
    bgTokenizer.$tokenizeRow = function(row) {
        var data = popup.data[row];
        var tokens = [];
        if (!data)
            return tokens;
        if (typeof data == "string")
            data = {value: data};
        if (!data.caption)
            data.caption = data.value || data.name;

        var last = -1;
        var flag, c;
        for (var i = 0; i < data.caption.length; i++) {
            c = data.caption[i];
            flag = data.matchMask & (1 << i) ? 1 : 0;
            if (last !== flag) {
                tokens.push({type: data.className || "" + ( flag ? "completion-highlight" : ""), value: c});
                last = flag;
            } else {
                tokens[tokens.length - 1].value += c;
            }
        }

        if (data.meta) {
            var maxW = popup.renderer.$size.scrollerWidth / popup.renderer.layerConfig.characterWidth;
            var metaData = data.meta;
            if (metaData.length + data.caption.length > maxW - 2) {
                // trim meta to fit this popup and add ellipsis
                metaData = metaData.substr(0, maxW - data.caption.length - 3) + "\u2026"
            }
            tokens.push({type: "rightAlignedText", value: metaData});
        }
        return tokens;
    };
    bgTokenizer.$updateOnChange = noop;
    bgTokenizer.start = noop;

    popup.session.$computeWidth = function() {
        return this.screenWidth = 0;
    };

    // public
    popup.isOpen = false;
    popup.isTopdown = false;

    popup.data = [];
    popup.setData = function(list) {
        popup.setValue(lang.stringRepeat("\n", list.length), -1);
        popup.data = list || [];
        popup.setRow(0);
    };
    popup.getData = function(row) {
        return popup.data[row];
    };

    popup.getRow = function() {
        return selectionMarker.start.row;
    };
    popup.setRow = function(line) {
        line = Math.max(0, Math.min(this.data.length, line));
        if (selectionMarker.start.row != line) {
            popup.selection.clearSelection();
            selectionMarker.start.row = selectionMarker.end.row = line || 0;
            popup.session._emit("changeBackMarker");
            popup.moveCursorTo(line || 0, 0);
            if (popup.isOpen)
                popup._signal("select");
        }
    };

    popup.on("changeSelection", function() {
        if (popup.isOpen)
            popup.setRow(popup.selection.lead.row);
        popup.renderer.scrollCursorIntoView();
    });

    popup.hide = function() {
        this.container.style.display = "none";
        this._signal("hide");
        popup.isOpen = false;
    };
    popup.show = function(pos, lineHeight, topdownOnly) {
        var el = this.container;
        var screenHeight = window.innerHeight;
        var screenWidth = window.innerWidth;
        var renderer = this.renderer;
        // var maxLines = Math.min(renderer.$maxLines, this.session.getLength());
        var maxH = renderer.$maxLines * lineHeight * 1.4;
        var top = pos.top + this.$borderSize;
        var allowTopdown = top > screenHeight / 2 && !topdownOnly;
        if (allowTopdown && top + lineHeight + maxH > screenHeight) {
            renderer.$maxPixelHeight = top - 2 * this.$borderSize;
            el.style.top = "";
            el.style.bottom = screenHeight - top + "px";
            popup.isTopdown = false;
        } else {
            top += lineHeight;
            renderer.$maxPixelHeight = screenHeight - top - 0.2 * lineHeight;
            el.style.top = top + "px";
            el.style.bottom = "";
            popup.isTopdown = true;
        }

        el.style.display = "";
        this.renderer.$textLayer.checkForSizeChanges();

        var left = pos.left;
        if (left + el.offsetWidth > screenWidth)
            left = screenWidth - el.offsetWidth;

        el.style.left = left + "px";

        this._signal("show");
        lastMouseEvent = null;
        popup.isOpen = true;
    };

    popup.getTextLeftOffset = function() {
        return this.$borderSize + this.renderer.$padding + this.$imageSize;
    };

    popup.$imageSize = 0;
    popup.$borderSize = 1;

    return popup;
};

dom.importCssString("\
.ace_autocomplete.ace-tm .ace_marker-layer .ace_active-line {\
    background-color: #CAD6FA;\
    z-index: 1;\
}\
.ace_autocomplete.ace-tm .ace_line-hover {\
    border: 1px solid #abbffe;\
    margin-top: -1px;\
    background: rgba(233,233,253,0.4);\
}\
.ace_autocomplete .ace_line-hover {\
    position: absolute;\
    z-index: 2;\
}\
.ace_autocomplete .ace_scroller {\
   background: none;\
   border: none;\
   box-shadow: none;\
}\
.ace_rightAlignedText {\
    color: gray;\
    display: inline-block;\
    position: absolute;\
    right: 4px;\
    text-align: right;\
    z-index: -1;\
}\
.ace_autocomplete .ace_completion-highlight{\
    color: #000;\
    text-shadow: 0 0 0.01em;\
}\
.ace_autocomplete {\
    width: 280px;\
    z-index: 200000;\
    background: #fbfbfb;\
    color: #444;\
    border: 1px lightgray solid;\
    position: fixed;\
    box-shadow: 2px 3px 5px rgba(0,0,0,.2);\
    line-height: 1.4;\
}");

exports.AcePopup = AcePopup;

});
