/*
 * Copyright 2015,2016 Open Networking Laboratory
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 ONOS GUI -- SVG -- Glyph Service
 */
(function () {
    'use strict';

    // injected references
    var $log, fs, sus;

    // internal state
    var glyphs = d3.map();

    // ----------------------------------------------------------------------
    // Base set of Glyphs...

    var birdData = {
            _bird: "352 224 113 112",
            bird: "M427.7,300.4 c-6.9,0.6-13.1,5-19.2,7.1c-18.1,6.2-33.9," +
            "9.1-56.5,4.7c24.6,17.2,36.6,13,63.7,0.1c-0.5,0.6-0.7,1.3-1.3," +
            "1.9c1.4-0.4,2.4-1.7,3.4-2.2c-0.4,0.7-0.9,1.5-1.4,1.9c2.2-0.6," +
            "3.7-2.3,5.9-3.9c-2.4,2.1-4.2,5-6,8c-1.5,2.5-3.1,4.8-5.1,6.9c-1," +
            "1-1.9,1.9-2.9,2.9c-1.4,1.3-2.9,2.5-5.1,2.9c1.7,0.1,3.6-0.3,6.5" +
            "-1.9c-1.6,2.4-7.1,6.2-9.9,7.2c10.5-2.6,19.2-15.9,25.7-18c18.3" +
            "-5.9,13.8-3.4,27-14.2c1.6-1.3,3-1,5.1-0.8c1.1,0.1,2.1,0.3,3.2," +
            "0.5c0.8,0.2,1.4,0.4,2.2,0.8l1.8,0.9c-1.9-4.5-2.3-4.1-5.9-6c-2.3" +
            "-1.3-3.3-3.8-6.2-4.9c-7.1-2.6-11.9,11.7-11.7-5c0.1-8,4.2-14.4," +
            "6.4-22c1.1-3.8,2.3-7.6,2.4-11.5c0.1-2.3,0-4.7-0.4-7c-2-11.2-8.4" +
            "-21.5-19.7-24.8c-1-0.3-1.1-0.3-0.9,0c9.6,17.1,7.2,38.3,3.1,54.2" +
            "C429.9,285.5,426.7,293.2,427.7,300.4z"
        },

    // TODO: ONOS-2566 glyphs for device types:
    //          otn, roadm_otn, firewall, balancer, ips, ids,
    //          controller, virtual, fiber_switch, other

    // NOTE: when adding glyphs, please also update TopoConstants.Glyphs class.

        tableFrame = 'M6.3,5.3h8.5v14.2h-8.5z' +
            'M95.3,5.3h8.5v14.2h-8.5z' +
            'M18.5,5.3h15.6v14.2h-15.6z' +
            'M37.9,5.3h15.6v14.2h-15.6z' +
            'M57,5.3h15.6v14.2h-15.6z' +
            'M76.1,5.3h15.6v14.2h-15.6z' +
            'M6.3,23.9h97.5v80.75h-97.5z',

        glyphDataSet = {
            _viewbox: "0 0 110 110",

            unknown: "M35,40a5,5,0,0,1,5-5h30a5,5,0,0,1,5,5v30a5,5,0,0,1-5,5" +
            "h-30a5,5,0,0,1-5-5z",

            query: "M51.4,69.9c0-0.9,0-1.6,0-2.1c0-2.7,0.4-5.1,1.2-7.1" +
            "c0.6-1.5,1.5-3,2.8-4.5c0.9-1.1,2.6-2.7,5.1-4.8c2.4-2.1,4-3.8," +
            "4.8-5.1 c0.7-1.3,1.1-2.6,1.1-4.1c0-2.7-1.1-5.1-3.2-7.1c-2.1-2" +
            "-4.8-3.1-7.9-3.1c-3,0-5.5,0.9-7.5,2.8c-2,1.9-3.3,4.8-4,8.7l-7.2" +
            "-0.8 c0.7-5.3,2.6-9.3,5.8-12.1c3.2-2.8,7.5-4.2,12.8-4.2c5.6,0," +
            "10.1,1.5,13.4,4.5c3.3,3,5,6.7,5,10.9c0,2.5-0.6,4.8-1.8,6.8 " +
            "s-3.5,4.6-6.9,7.6c-2.3,2-3.8,3.5-4.5,4.4c-0.7,1-1.2,2-1.6,3.3" +
            "c-0.3,1.2-0.5,3.2-0.6,6H51.4z M51,83.8v-7.9h8v7.9H51z",

            node: "M15,100a5,5,0,0,1-5-5v-65a5,5,0,0,1,5-5h80a5,5,0,0,1,5,5" +
            "v65a5,5,0,0,1-5,5zM14,22.5l11-11a10,3,0,0,1,10-2h40a10,3,0,0,1," +
            "10,2l11,11zM16,35a5,5,0,0,1,10,0a5,5,0,0,1-10,0z",

            switch: "M10,20a10,10,0,0,1,10-10h70a10,10,0,0,1,10,10v70a10,10," +
            "0,0,1-10,10h-70a10,10,0,0,1-10-10zM60,26l12,0,0-8,18,13-18,13,0" +
            "-8-12,0zM60,60l12,0,0-8,18,13-18,13,0-8-12,0zM50,40l-12,0,0-8" +
            "-18,13,18,13,0-8,12,0zM50,74l-12,0,0-8-18,13,18,13,0-8,12,0z",

            roadm: "M10,35l25-25h40l25,25v40l-25,25h-40l-25-25zM58,26l12,0,0" +
            "-8,18,13-18,13,0-8-12,0zM58,60l12,0,0-8,18,13-18,13,0-8-12,0z" +
            "M52,40l-12,0,0-8-18,13,18,13,0-8,12,0zM52,74l-12,0,0-8-18,13," +
            "18,13,0-8,12,0z",

            otn: "M10,35l25-25h40l25,25v40l-25,25h-40l-25-25zM58,26l12,0,0" +
            "-8,18,13-18,13,0-8-12,0zM58,60l12,0,0-8,18,13-18,13,0-8-12,0z" +
            "M52,40l-12,0,0-8-18,13,18,13,0-8,12,0zM52,74l-12,0,0-8-18,13," +
            "18,13,0-8,12,0z",

            endstation: "M10,15a5,5,0,0,1,5-5h65a5,5,0,0,1,5,5v80a5,5,0,0,1" +
            "-5,5h-65a5,5,0,0,1-5-5zM87.5,14l11,11a3,10,0,0,1,2,10v40a3,10," +
            "0,0,1,-2,10l-11,11zM17,19a2,2,0,0,1,2-2h56a2,2,0,0,1,2,2v26a2," +
            "2,0,0,1-2,2h-56a2,2,0,0,1-2-2zM20,20h54v10h-54zM20,33h54v10h" +
            "-54zM42,70a5,5,0,0,1,10,0a5,5,0,0,1-10,0z",

            router: "M10,55A45,45,0,0,1,100,55A45,45,0,0,1,10,55M20,50l12,0," +
            "0-8,18,13-18,13,0-8-12,0zM90,50l-12,0,0-8-18,13,18,13,0-8,12,0z" +
            "M50,47l0-12-8,0,13-18,13,18-8,0,0,12zM50,63l0,12-8,0,13,18,13" +
            "-18-8,0,0-12z",

            bgpSpeaker: "M10,40a45,35,0,0,1,90,0Q100,77,55,100Q10,77,10,40z" +
            "M50,29l12,0,0-8,18,13-18,13,0-8-12,0zM60,57l-12,0,0-8-18,13," +
            "18,13,0-8,12,0z",

            microwave: "M85,71.2c-8.9,10.5-29.6,8.7-45.3-3.5C23.9,55.4,19.8," +
            "37,28.6,26.5C29.9,38.6,71.5,69.9,85,71.2z M92.7,76.2M16.2,15 " +
            "M69.5,100.7v-4c0-1.4-1.2-2.2-2.6-2.2H19.3c-1.4,0-2.8,0.7-2.8,2.2" +
            "v3.9c0,0.7,0.8,1,1.5,1h50.3C69,101.5,69.5,101.3,69.5,100.7z " +
            "M77.3,7.5l0,3.7c9,0.1,16.3,7.1,16.2,15.7l3.9,0C97.5,16.3,88.5," +
            "7.6,77.3,7.5z M77.6,14.7l0,2.5c5.3,0,9.7,4.2,9.6,9.3l2.6,0C89.9" +
            ",20,84.4,14.7,77.6,14.7z M82.3,22.2c-1.3-1.2-2.9-1.9-4.7-1.9" +
            "l0,1.2c1.4,0,2.8,0.6,3.8,1.5c1,1,1.6,2.3,1.6,3.7l1.3,0C84.3,25.1," +
            "83.6,23.4,82.3,22.2z M38.9,69.5l-5.1,23h16.5l-2.5-17.2C44.1,73.3," +
            "38.9,69.5,38.9,69.5zM58.1,54.1c13.7,10.1,26.5,16.8,29.2,13.7" +
            "c2.7-3.1-5.6-13-19.3-24.4 M62.9,34.2 M62,37.9C47.7,27.3,33.7,20," +
            "31,23.1c-2.7,3.2,7,14.2,20.6,26 M73.9,25.7c-2.9,0.1-5.2,2.3-5.1," +
            "4.8c0,0.7,0.2,1.4,0.6,2l0,0L53.8,49.7l3.3,2.5L72.7,35l-0.4-0.3" +
            "c0.6,0.2,1.3,0.3,1.9,0.3c2.9-0.1,5.2-2.3,5.1-4.9C79.3,27.6,76.8," +
            "25.6,73.9,25.7z",

            chain: "M60.4,77.6c-4.9,5.2-9.6,11.3-15.3,16.3c-8.6,7.5-20.4,6.8" +
            "-28-0.8c-7.7-7.7-8.4-19.6-0.8-28.4c6.5-7.4,13.5-14.4,20.9-20.9" +
            "c7.5-6.7,19.2-6.7,26.5-0.8c3.5,2.8,4.4,6.1,2.2,8.7c-2.7,3.1" +
            "-5.5,2.5-8.5,0.3c-4.7-3.4-9.7-3.2-14,0.9C37.1,58.7,31,64.8," +
            "25.2,71c-4.2,4.4-4.2,10.6-0.6,14.3c3.7,3.7,9.7,3.7,14.3-0.4" +
            "c2.9-2.5,5.3-5.5,8.3-8c1-0.9,3-1.1,4.4-0.9C54.8,76.3,57.9,77.1," +
            "60.4,77.6zM49.2,32.2c5-5.2,9.7-10.9,15.2-15.7c12.8-11,31.2" +
            "-4.9,34.3,11.2C100,34.2,98.3,40.2,94,45c-6.7,7.4-13.7,14.6" +
            "-21.2,21.2C65.1,73,53.2,72.7,46,66.5c-3.2-2.8-3.9-5.8-1.6-8.4" +
            "c2.6-2.9,5.3-2.4,8.2-0.3c5.2,3.7,10,3.3,14.7-1.1c5.8-5.6,11.6" +
            "-11.3,17.2-17.2c4.6-4.8,4.9-11.1,0.9-15c-3.9-3.9-10.1-3.4-15," +
            "1.2c-3.1,2.9-5.7,7.4-9.3,8.5C57.6,35.3,53,33,49.2,32.2z",

            crown: "M99.5,21.6c0,3-2.3,5.4-5.1,5.4c-0.3,0-0.7,0-1-0.1c-1.8," +
            "4-4.8,10-7.2,17.3c-3.4,10.6-0.9,26.2,2.7,27.3C90.4,72,91.3," +
            "75,88,75H22.7c-3.3,0-2.4-3-0.9-3.5c3.6-1.1,6.1-16.7,2.7-27.3" +
            "c-2.4-7.4-5.4-13.5-7.2-17.5c-0.5,0.2-1,0.3-1.6,0.3c-2.8,0" +
            "-5.1-2.4-5.1-5.4c0-3,2.3-5.4,5.1-5.4c2.8,0,5.1,2.4,5.1,5.4c0," +
            "1-0.2,1.9-0.7,2.7c0.7,0.8,1.4,1.6,2.4,2.6c8.8,8.9,11.9,12.7," +
            "18.1,11.7c6.5-1,11-8.2,13.3-14.1c-2-0.8-3.3-2.7-3.3-5.1c0-3," +
            "2.3-5.4,5.1-5.4c2.8,0,5.1,2.4,5.1,5.4c0,2.5-1.6,4.5-3.7,5.2" +
            "c2.3,5.9,6.8,13,13.2,14c6.2,1,9.3-2.7,18.1-11.7c0.7-0.7,1.4" +
            "-1.5,2-2.1c-0.6-0.9-1-2-1-3.1c0-3,2.3-5.4,5.1-5.4C97.2,16.2," +
            "99.5,18.6,99.5,21.6zM92,87.9c0,2.2-1.7,4.1-3.8,4.1H22.4c" +
            "-2.1,0-4.4-1.9-4.4-4.1v-3.3c0-2.2,2.3-4.5,4.4-4.5h65.8c2.1," +
            "0,3.8,2.3,3.8,4.5V87.9z",

            lock: "M79.4,48.6h-2.7c0.2-5.7-0.2-20.4-7.9-28.8c-3.6-3.9-8.3" +
            "-5.9-13.7-5.9c-5.4,0-10.2,2-13.8,5.9c-7.8,8.4-8.3,23.2-8.1,28.8" +
            "h-2.7c-4.4,0-8,2.6-8,5.9v35.7c0,3.3,3.6,5.9,8,5.9h48.9c4.4,0," +
            "8-2.6,8-5.9V54.5C87.5,51.3,83.9,48.6,79.4,48.6z M48.1,26.1c1.9" +
            "-2,4.1-2.9,7-2.9c2.9,0,5.1,0.9,6.9,2.9c5,5.4,5.6,17.1,5.4,22.6" +
            "h-25C42.3,43.1,43.1,31.5,48.1,26.1z",

            topo: 'M97.2,76.3H86.6l-7.7-21.9H82c1,0,1.9-0.8,1.9-1.9V35.7c' +
            '0-1-0.8-1.9-1.9-1.9H65.2c-1,0-1.9,0.8-1.9,1.9v2.6L33.4,26.1v-11' +
            'c0-1-0.8-1.9-1.9-1.9H14.7c-1,0-1.9,0.8-1.9,1.9v16.8c0,1,0.8,' +
            '1.9,1.9,1.9h16.8c1,0,1.9-0.8,1.9-1.9v-2.6l29.9,12.2v9L30.5,76.9' +
            'c-0.3-0.3-0.8-0.5-1.3-0.5H12.4c-1,0-1.9,0.8-1.9,1.9V95c0,1,0.8,' +
            '1.9,1.9,1.9h16.8c1,0,1.9-0.8,1.9-1.9v-6.9h47.4V95c0,1,0.8,1.9,' +
            '1.9,1.9h16.8c1,0,1.9-0.8,1.9-1.9V78.2C99.1,77.2,98.2,76.3,97.2,' +
            '76.3z M31.1,85.1v-4.9l32.8-26.4c0.3,0.3,0.8,0.5,1.3,0.5h10.5l' +
            '7.7,21.9h-3c-1,0-1.9,0.8-1.9,1.9v6.9H31.1z',

            refresh: 'M102.6,40.8L88.4,70.5L69.8,43.4L80,42.6c-0.7-2.3-1.7-' +
            '5.1-3.4-7.8C71.8,27,64,23.1,53.5,23.1c-19.5,0-24.8,11.2-24.8,' +
            '11.3l-10.1-4.3c0.3-0.7,7.9-18,35-18c24.8,0,35,17.3,37.7,29.6L' +
            '102.6,40.8z M81.5,74.5c-0.2,0.5-5.5,11.4-24.9,11.4c-10.5,0-18.3' +
            '-3.9-23.1-11.7c-1.7-2.8-2.8-5.6-3.4-7.8l10.2-0.8L21.7,38.5L7.5,' +
            '68.2l11.4-0.9c2.7,12.3,12.9,29.6,37.7,29.6c26.9,0,34.6-17.2,34.9' +
            '-18L81.5,74.5z',

            garbage: 'M94.6,20.2c0,2.7-2.1,4.8-4.8,4.8H19.2c-2.7,0-4.8-2.1-' +
            '4.8-4.8s2.1-4.8,4.8-4.8h27.6c-0.8-0.7-1.4-1.7-1.4-2.9c0-2.1,1.7-' +
            '3.9,3.9-3.9h10.4c2.1,0,3.9,1.7,3.9,3.9c0,1.2-0.5,2.2-1.4,2.9h' +
            '27.6C92.5,15.4,94.6,17.6,94.6,20.2z M91,33.4v64.8c0,2-1.7,3.6-' +
            '3.8,3.6h-65c-2.1,0-3.8-1.6-3.8-3.6V33.4c0-2,1.7-3.6,3.8-3.6h65C' +
            '89.3,29.8,91,31.4,91,33.4z M31.5,37.7c0-2.1-1.2-3.8-2.7-3.8h-0.7' +
            'c-1.5,0-2.7,1.7-2.7,3.8v55.9c0,2.1,1.2,3.8,2.7,3.8h0.7c1.5,0,2.7' +
            '-1.7,2.7-3.8V37.7z M58.5,37.7c0-2.1-1.8-3.8-4-3.8h-1c-2.2,0-4,' +
            '1.7-4,3.8v55.9c0,2.1,1.8,3.8,4,3.8h1c2.2,0,4-1.7,4-3.8V37.7z M' +
            '83.5,37.7c0-2.1-1.2-3.8-2.7-3.8h-0.7c-1.5,0-2.7,1.7-2.7,3.8v55.9' +
            'c0,2.1,1.2,3.8,2.7,3.8h0.7c1.5,0,2.7-1.7,2.7-3.8V37.7z',


            // --- Navigation glyphs ------------------------------------

            flowTable: tableFrame +
            'M86,63.2c0,3.3-2.7,6-6,6c-2.8,0-5.1-1.9-5.8-' +
            '4.5H63.3v5.1c0,0.9-0.7,1.5-1.5,1.5h-5.2v10.6c2.6,0.7,4.5,3,4.5,' +
            '5.8c0,3.3-2.7,6-6,6c-3.3,0-6-2.7-6-6c0-2.8,1.9-5.1,4.4-5.8V71.3' +
            'H48c-0.9,0-1.5-0.7-1.5-1.5v-5.1H36c-0.7,2.6-3,4.4-5.8,4.4c-3.3,' +
            '0-6-2.7-6-6s2.7-6,6-6c2.8,0,5.2,1.9,5.8,4.5h10.5V56c0-0.9,0.7-' +
            '1.5,1.5-1.5h5.5V43.8c-2.6-0.7-4.5-3-4.5-5.8c0-3.3,2.7-6,6-6s6,' +
            '2.7,6,6c0,2.8-1.9,5.1-4.5,5.8v10.6h5.2c0.9,0,1.5,0.7,1.5,1.5v' +
            '5.6h10.8c0.7-2.6,3-4.5,5.8-4.5C83.3,57.1,86,59.8,86,63.2z ' +
            'M55.1,42.3c2.3,0,4.3-1.9,4.3-4.3c0-2.3-1.9-4.3-4.3-4.3' +
            's-4.3,1.9-4.3,4.3C50.8,40.4,52.7,42.3,55.1,42.3z ' +
            'M34.4,63.1c0-2.3-1.9-4.3-4.3-4.3s-4.3,1.9-4.3,4.3' +
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            nextIntent: "M88.1,55.7L34.6,13.1c0,0-1.6-0.5-2.1-0.2c-1.9,1.2" +
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            flows: "M93.8,46.1c-4.3,0-8,3-9,7H67.9v-8.8c0-1.3-1.1-2.4-2.4" +
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            eqMaster: "M100.1,46.9l-10.8-25h0.2c0.5,0,0.8-0.5,0.8-1.1v-3.2" +
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            "-2.3v-8C101.6,48,101,47.3,100.1,46.9z M22,23.7l10.8,22.8H12.1" +
            "L22,23.7z M97.9,46.5H77.2L88,23.7L97.9,46.5z"
        },

        badgeDataSet = {
            _viewbox: "0 0 10 10",

            uiAttached: "M2,2.5a.5,.5,0,0,1,.5-.5h5a.5,.5,0,0,1,.5,.5v3" +
            "a.5,.5,0,0,1-.5,.5h-5a.5,.5,0,0,1-.5-.5zM2.5,2.8a.3,.3,0,0,1," +
            ".3-.3h4.4a.3,.3,0,0,1,.3,.3v2.4a.3,.3,0,0,1-.3,.3h-4.4" +
            "a.3,.3,0,0,1-.3-.3zM2,6.55h6l1,1.45h-8z",

            checkMark: "M2.6,4.5c0,0,0.7-0.4,1.2,0.3l1.0," +
            "1.8c0,0,2.7-5.4,2.8-5.7c0,0,0.5-0.9,1.4-0.1c0," +
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            "0.5-1.2,0.1S2.2,5.4,2.2,5.4S2.2,4.7,2.6,4.5z",

            xMark: "M9.0,7.2C8.2,6.9,7.4,6.1,6.7,5.2c0.4-0.5," +
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            "C9.8,7.9,9.0,7.2,9.0,7.2z",

            triangleUp: "M0.5,6.2c0,0,3.8-3.8,4.2-4.2C5,1.7,5.3,2,5.3,2l4.3," +
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            triangleDown: "M9.5,4.2c0,0-3.8,3.8-4.2,4.2c-0.3,0.3-0.5,0-0.5," +
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            plus: "M4,2h2v2h2v2h-2v2h-2v-2h-2v-2h2z",

            minus: "M2,4h6v2h-6z",

            play: "M2.5,2l5.5,3l-5.5,3z",

            stop: "M2.5,2.5h5v5h-5z"
        },

        spriteData = {
            _cloud: '0 0 110 110',
            cloud: "M37.6,79.5c-6.9,8.7-20.4,8.6-22.2-2.7" +
            "M16.3,41.2c-0.8-13.9,19.4-19.2,23.5-7.8" +
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            "M95.8,58.5c10-4.1,11.7-17.8-0.9-19.8" +
            "M18.1,76.4C5.6,80.3,3.8,66,13.8,61.5" +
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            "M93.6,74.7c10.2-2,10.7-14,5.8-18.3" +
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            "M70.4,31c11.8-10.4,26.2-5.2,24.7,10.1"
        };

    // ----------------------------------------------------------------------
    // === Constants

    var msgGS = 'GlyphService.',
        rg = "registerGlyphs(): ",
        rgs = "registerGlyphSet(): ";

    // ----------------------------------------------------------------------

    function warn(msg) {
        $log.warn(msgGS + msg);
    }

    function addToMap(key, value, vbox, overwrite, dups) {
        if (!overwrite && glyphs.get(key)) {
            dups.push(key);
        } else {
            glyphs.set(key, {id: key, vb: vbox, d: value});
        }
    }

    function reportDups(dups, which) {
        var ok = (dups.length == 0),
            msg = 'ID collision: ';

        if (!ok) {
            dups.forEach(function (id) {
                warn(which + msg + '"' + id + '"');
            });
        }
        return ok;
    }

    function reportMissVb(missing, which) {
        var ok = (missing.length == 0),
            msg = 'Missing viewbox property: ';

        if (!ok) {
            missing.forEach(function (vbk) {
                warn(which + msg + '"' + vbk + '"');
            });
        }
        return ok;
    }

    // ----------------------------------------------------------------------
    // === API functions ===

    function clear() {
        // start with a fresh map
        glyphs = d3.map();
    }

    function init() {
        registerGlyphs(birdData);
        registerGlyphSet(glyphDataSet);
        registerGlyphSet(badgeDataSet);
        registerGlyphs(spriteData);
    }

    function registerGlyphs(data, overwrite) {
        var dups = [],
            missvb = [];

        angular.forEach(data, function (value, key) {
            var vbk = '_' + key,
                vb = data[vbk];

            if (key[0] !== '_') {
                if (!vb) {
                    missvb.push(vbk);
                    return;
                }
                addToMap(key, value, vb, overwrite, dups);
            }
        });
        return reportDups(dups, rg) && reportMissVb(missvb, rg);
    }

    function registerGlyphSet(data, overwrite) {
        var dups = [],
            vb = data._viewbox;

        if (!vb) {
            warn(rgs + 'no "_viewbox" property found');
            return false;
        }

        angular.forEach(data, function (value, key) {
            if (key[0] !== '_') {
                addToMap(key, value, vb, overwrite, dups);
            }
        });
        return reportDups(dups, rgs);
    }

    function ids() {
        return glyphs.keys();
    }

    function glyph(id) {
        return glyphs.get(id);
    }

    function glyphDefined(id) {
        return glyphs.has(id);
    }

    // Note: defs should be a D3 selection of a single <defs> element
    function loadDefs(defs, glyphIds, noClear) {
        var list = fs.isA(glyphIds) || ids(),
            clearCache = !noClear;

        if (clearCache) {
            // remove all existing content
            defs.html(null);
        }

        // load up the requested glyphs
        list.forEach(function (id) {
            var g = glyph(id);
            if (g) {
                if (noClear) {
                    // quick exit if symbol is already present
                    if (defs.select('symbol#' + g.id).size() > 0) {
                        return;
                    }
                }
                defs.append('symbol')
                    .attr({ id: g.id, viewBox: g.vb })
                    .append('path').attr('d', g.d);
            }
        });
    }

    // trans can specify translation [x,y]
    function addGlyph(elem, glyphId, size, overlay, trans) {
        var sz = size || 40,
            ovr = !!overlay,
            xns = fs.isA(trans),
            atr = {
                width: sz,
                height: sz,
                'class': 'glyph',
                'xlink:href': '#' + glyphId
            };

        if (xns) {
            atr.transform = sus.translate(trans);
        }
        return elem.append('use').attr(atr).classed('overlay', ovr);
    }

    // ----------------------------------------------------------------------

    angular.module('onosSvg')
    .factory('GlyphService',
        ['$log', 'FnService', 'SvgUtilService',

        function (_$log_, _fs_, _sus_) {
            $log = _$log_;
            fs = _fs_;
            sus = _sus_;

            return {
                clear: clear,
                init: init,
                registerGlyphs: registerGlyphs,
                registerGlyphSet: registerGlyphSet,
                ids: ids,
                glyph: glyph,
                glyphDefined: glyphDefined,
                loadDefs: loadDefs,
                addGlyph: addGlyph
            };
        }]
    )
    .run(['$log', function ($log) {
        $log.debug('Clearing glyph cache');
        clear();
    }]);

}());