//******************************************************************
//
// Copyright 2015 Samsung Electronics All Rights Reserved.
//
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//
// 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.
//
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

// Note that this diagram is not the best example of efficient
// graphviz/doxygen use. It was recreating the look of an existing
// graphic and thus is focused too much on appearance over
// functionality.
//

digraph G {
    label = "Abstracted Architecture";

    z [
        label = "Resource Introspection",
        shape = box,
        style = filled,
        fillcolor="#efefef:#bdbdbd",
        gradientangle=270,
        width=8
    ];

    subgraph cluster_0 {
        label = "Connectivity Framework";
        labeljust="l";

        yy [
            label = "Connectivity API",
            shape = box,
            style = filled,
            color = "#4a7bbd",
            fillcolor="#e6efff:#a5c5ff",
            gradientangle=270,
            width=8
        ];

        subgraph cluster_1 {
            label = "Control layer";
            style=filled;
            color = "#4a7bbd";
            fillcolor="#e6efff:#a5c5ff";
            gradientangle=270;

            node [
                style=filled,
                color="#9cbd52",
                fillcolor="#f7ffe6:#deffad",
                gradientangle=270,
                shape=box
            ];

            a0 [label="Network\nConfiguration"];
            a1 [label="CoAP\nProtocol"];
            a2 [label="Interface\nController"];

            {rank = same a0 a1 a2}
        }

        subgraph cluster_2 {
            label = "Transport Adapter";
            style=filled;
            color = "#4a7bbd"
            fillcolor="#e6efff:#a5c5ff";
            gradientangle=270;
            node [
                style=filled,
                color="#9cbd52",
                fillcolor="#f7ffe6:#deffad",
                gradientangle=270,
                shape=box
            ];

            bb [label = "Common Adapter Interface", width=5];

            b0 [label="IP\nAdapter"];
            b1 [label="LE GATT\nAdapter"];
            b2 [label="BT SPP\nAdapter"];
            b3 [label="XXX\nAdapter"];

            {rank = same b0 b1 b2 b3}
        }

        subgraph cluster_3 {
            label = "Platform Adapter";
            style=filled;
            color = "#4a7bbd"
            fillcolor="#e6efff:#a5c5ff";
            gradientangle=270;
            node [
                style=filled
                color="#7b5aa5"
                fillcolor="#f7e6f7:#c5b5ef";
                gradientangle=270;
                shape=box
            ];

            c0 [label="Ubuntu\nAdapter\n(ETH/WIFI/BT)"];
            c1 [label="Android\nAdapter\n(WIFI/BLE/BT)"];
            c2 [label="Tizen\nAdapter\n(WIFI/BLE/BT)"];
            c3 [label="Arduino\nAdapter\n(ETH/WIFI/BLE)"];
            c4 [label="Platform\n(6loWPAN)\n ", color="#f7e6f7"];

            {rank = same c0 c1 c2 c3 c4}
        }
    }

    {
        node [
            style = filled,
            fillcolor="#efefef:#bdbdbd",
            gradientangle=270,
            shape=box
        ];

        d0 [label="Ubuntu"];
        d1 [label="Android"];
        d2 [label="Tizen"];
        d3 [label="Arduino"];
        d4 [label="????"];

        {rank = same d0 d1 d2 d3 d4}
    }

    subgraph cluster_lgd {
        label = "Legend";

        node [
            style = filled,
            width=0.25,
            height=0.25,
            fixedsize=true,
            shape=box,
            gradientangle=270
        ];

        e0 [label=" ", color="#4a7bbd", fillcolor="#e6efff:#a5c5ff"];
        e1 [label=" ", color="#9cbd52", fillcolor="#f7ffe6:#deffad"];
        e2 [label=" ", color="#7b5aa5", fillcolor="#f7e6f7:#c5b5ef"];
        e3 [label=" ", fillcolor="#efefef:#bdbdbd"];
        e_dummy[shape=point, style=invis];

        edge [penwidth=0,
              arrowhead=none,
              fontsize=10];
        e0 -> e1 [label="CA Component    "];
        e1 -> e2 [label="CA Module-platform independent    "];
        e2 -> e3 [label="CA Module-platform specific    "];
        e3 -> e_dummy [label="External"];

        {rank = same e0 e1 e2 e3 e_dummy}
    }

    // In order to control placement of the sets of items in a
    // top-to-bottom placement, invisible edges/arrows are used.
    // This gives a logcial control for the physical appearance we want.
    {
        edge[style = invis];

        // order groups to get top-to-bottom
        z -> yy
        yy -> {a0 a2}
        a1 -> bb
        {a0 a2} -> {b1 b2}
        bb -> {b1 b2}
        {b0 b1 b2 b3} -> c2
        c0 -> d0
        c1 -> d1
        c2 -> d2
        c3 -> d3
        d0 -> e0
        {d2} -> {e1 e2}
        d4 -> e3

        // order nodes left-to-right
        a0 -> a1 -> a2
        b0 -> b1 -> b2 -> b3
        c0 -> c1 -> c2 -> c3 -> c4
        d0 -> d1 -> d2 -> d3 -> d4
        e0 -> e1 -> e2 -> e3
    }
}