/*
 * Copyright 2015 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," +
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            "-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.

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

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            query: "M51.4,69.9c0-0.9,0-1.6,0-2.1c0-2.7,0.4-5.1,1.2-7.1" +
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            "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" +
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            endstation: "M10,15a5,5,0,0,1,5-5h65a5,5,0,0,1,5,5v80a5,5,0,0,1" +
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            "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" +
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        },

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

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

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

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

        spriteData = {
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        };

    // ----------------------------------------------------------------------
    // === 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();
    }]);

}());