/*
 * 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 = {
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        },

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

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            "9.4,9.4,9.4c4.3,0,8-2.9,9-6.9h16.4v7.9c0,1.3,1.1,2.4,2.4,2.4" +
            "h8.6v16.6c-4,1.1-6.9,4.7-6.9,9c0,5.2,4.2,9.4,9.4,9.4c5.2,0," +
            "9.4-4.2,9.4-9.4c0-4.4-3-8-7.1-9.1V68.2h8.1c1.3,0,2.4-1.1,2.4" +
            "-2.4v-7.9h16.8c1.1,4,4.7,7,9,7c5.2,0,9.4-4.2,9.4-9.4S99,46.1," +
            "93.8,46.1z M48.7,16.3c0-3.5,2.9-6.4,6.4-6.4c3.5,0,6.4,2.9,6.4," +
            "6.4s-2.9,6.4-6.4,6.4C51.5,22.6,48.7,19.8,48.7,16.3zM16.2,61.7c" +
            "-3.5,0-6.4-2.9-6.4-6.4c0-3.5,2.9-6.4,6.4-6.4s6.4,2.9,6.4,6.4" +
            "C22.6,58.9,19.7,61.7,16.2,61.7z M61.4,93.7c0,3.5-2.9,6.4-6.4," +
            "6.4c-3.5,0-6.4-2.9-6.4-6.4c0-3.5,2.9-6.4,6.4-6.4C58.6,87.4," +
            "61.4,90.2,61.4,93.7z M93.8,61.8c-3.5,0-6.4-2.9-6.4-6.4c0-3.5," +
            "2.9-6.4,6.4-6.4s6.4,2.9,6.4,6.4C100.1,58.9,97.3,61.8,93.8,61.8z",

            eqMaster: "M100.1,46.9l-10.8-25h0.2c0.5,0,0.8-0.5,0.8-1.1v-3.2" +
            "c0-0.6-0.4-1.1-0.8-1.1H59.2v-5.1c0-0.5-0.8-1-1.7-1h-5.1c-0.9,0" +
            "-1.7,0.4-1.7,1v5.1l-30.2,0c-0.5,0-0.8,0.5-0.8,1.1v3.2c0,0.6," +
            "0.4,1.1,0.8,1.1h0.1l-10.8,25C9,47.3,8.4,48,8.4,48.8v1.6l0,0h0" +
            "v6.4c0,1.3,1.4,2.3,3.2,2.3h21.7c1.8,0,3.2-1,3.2-2.3v-8c0-0.9" +
            "-0.7-1.6-1.7-2L22.9,21.9h27.9v59.6l-29,15.9c0,1.2,1.8,2.2,4.1," +
            "2.2h58.3c2.3,0,4.1-1,4.1-2.2l-29-15.9V21.9h27.8L75.2,46.8c-1," +
            "0.4-1.7,1.1-1.7,2v8c0,1.3,1.4,2.3,3.2,2.3h21.7c1.8,0,3.2-1,3.2" +
            "-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," +
            "0,0.5,0.5,0,1.3S6.8,7.3,5.6,9.2c0,0-0.4," +
            "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," +
            "0.7-0.8,0.8-1.0C7.8,3.5,9.4,1.6,8.1,1.1" +
            "C6.8,0.6,6.6,1.7,6.6,1.7C6.4,2.1,6.0,2.7,5.4," +
            "3.4C4.9,2.5,4.5,1.9,4.5,1.9" +
            "S3.8,0.2,2.9,0.7C1.9,1.1,2.3,2.3,2.3,2.3c0.3,1.1,0.8,2.1,1.4,2.9" +
            "C2.5,6.4,1.3,7.4,1.3,7.4S0.8,7.8,0.8,8.1C0.9,8.3,0.9,9.6,2.4,9.1" +
            "C3.1,8.8,4.1,7.9,5.1,7.0c1.3,1.3,2.5,1.9,2.5,1.9s0.5,0.5,1.4-0.2" +
            "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," +
            "4.3c0,0,0.4,0.4-0.1,0.4c-1.7,0-8.2,0-8.8,0C0,6.6,0.5,6.2,0.5,6.2z",

            triangleDown: "M9.5,4.2c0,0-3.8,3.8-4.2,4.2c-0.3,0.3-0.5,0-0.5," +
            "0L0.5,4.2c0,0-0.4-0.4,0.1-0.4c1.7,0,8.2,0,8.8,0C10,3.8,9.5,4.2," +
            "9.5,4.2z",

            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" +
            "M38.9,30.9c5.1-9.4,15.1-8.5,16.9-1.3" +
            "M54.4,32.9c4-12.9,14.8-9.6,18.6-3.8" +
            "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" +
            "M16.2,62.4C2.1,58.4,3.5,36,16.8,36.6" +
            "M93.6,74.7c10.2-2,10.7-14,5.8-18.3" +
            "M71.1,79.3c11.2,7.6,24.6,6.4,22.1-11.7" +
            "M36.4,76.8c3.4,13.3,35.4,11.6,36.1-1.4" +
            "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() {
        clear();
        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);
    }

    // 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,
                loadDefs: loadDefs,
                addGlyph: addGlyph
            };
        }]
    );

}());