/*
 * MIT License
 *
 * Copyright (c) 2019 Alexey Edelev <semlanik@gmail.com>
 *
 * This file is part of NeuralNetwork project https://git.semlanik.org/semlanik/NeuralNetwork
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the Software
 * without restriction, including without limitation the rights to use, copy, modify,
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and
 * to permit persons to whom the Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies
 * or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

import QtQuick 2.11
import QtQuick.Window 2.11
import QtQuick.Controls 1.4
import NeuralNetworkUi 0.1
import remotecontrol 1.0

ApplicationWindow {
    id: root
    visible: true
    width: 1024
    height: 768

    Rectangle {
        id: bottomLayer
        anchors.fill: parent
        color: "#000000"
    }

    Row {
        id: rowww
        anchors.left: parent.left
        anchors.top: parent.top
        anchors.margins: 10
        Repeater {
            id: layerRepeater
            model: visualizerModel.sizes.length
            delegate: Item {
                id: layerDelegate
                property alias neurons: neuronRepeater
                anchors.verticalCenter: parent.verticalCenter
                property int layerIndex: model.index
                property int layerSize: visualizerModel.sizes[layerIndex]
                width: 120
                height: activationsColumn.height
                Column {
                    id: activationsColumn
                    width: 50
                    spacing: 10
                    Repeater {
                        id: neuronRepeater
                        model: layerSize
                        delegate:Rectangle {
                            width: 20
                            height: 20
                            radius: 10
                            color: "#00ffffff"
                            Rectangle {
                                id: neuron
                                property ValueIndicator activation: visualizerModel.activation(layerIndex, model.index)

                                anchors.fill: parent
                                radius: 15
                                color: "#00ff00"
                                ColorAnimation {
                                    id: anim
                                    target: neuron
                                    property: "color"
                                    to: "#000000"
                                    duration: 100
                                }

                                function updateColor() {
                                    var alpha = activation.value;
                                    neuron.color = anim.to
                                    anim.stop()
                                    anim.from = anim.to
                                    anim.to = Qt.rgba(0, 1, 0, Math.max(0.08, alpha))
                                    anim.start()
                                }
                                Component.onCompleted: {
                                    visualizerModel.activationTrigger(layerIndex).updateLayer.connect(neuron.updateColor);
                                }
                            }
                        }
                    }
                }
            }
        }
        onWidthChanged: {
            console.log("width: " + width)
            if (width !== visualizerModel.sizes.length*120) {
                return
            }

            for (var i = 1; i < layerRepeater.count; i++) {
                var neurons = layerRepeater.itemAt(i).neurons
                var neuronsPrev = layerRepeater.itemAt(i - 1).neurons
                for (var j = 0; j < neurons.count; j++) {
                    var neuron = neurons.itemAt(j)
                    var coord = layerRepeater.itemAt(i).mapToItem(root.contentItem, neuron.x + neuron.width/2, neuron.y + neuron.height/2)
                    for(var k = 0; k < neuronsPrev.count; k++) {
                        var neuronPrev = neuronsPrev.itemAt(k)
                        var coordPrev = layerRepeater.itemAt(i - 1).mapToItem(root.contentItem, neuronPrev.x + neuronPrev.width/2, neuronPrev.y + neuronPrev.height/2)
                        var angle =  Math.atan2(coordPrev.y - coord.y, coordPrev.x - coord.x) * 180 / Math.PI
                        var length = Math.sqrt(Math.pow(coordPrev.x - coord.x, 2) + Math.pow(coordPrev.y - coord.y, 2))
                        var obj = connectionComponent.createObject(bottomLayer, {
                                                    x: coord.x,
                                                    y: coord.y,
                                                    width: length,
                                                    angle: angle,
                                                    weight: visualizerModel.weight(i, j, k),
                                                })
                        visualizerModel.weightTrigger(i).updateLayer.connect(obj.updateColor);
                    }
                }
            }
        }
    }

    Component {
        id: connectionComponent
        Rectangle {
            id: connection
            property alias angle: trans.angle
            property ValueIndicator weight: null

            transformOrigin: Item.Left
            transform: Rotation {
                id: trans
            }
            color: "transparent"
            height: 1
            function updateColor() {
                var newColor = weight.value;
                connection.color = Qt.rgba(newColor, 0, 1.0 - newColor, newColor > 0 ? 0.5 : 0.0)
            }
        }
    }

    Row {
        anchors.right: parent.right
        anchors.top: parent.top
        anchors.margins: 20
        spacing: 10
        Text {
            color: "#ffffff"
            text: "Active state: " + visualizerModel.networkState.state
        }

        Button {
            id: start
            text: "Start"

            enabled: visualizerModel.networkState.state === NetworkState.Idle
            onClicked: {
                visualizerModel.start();
            }
        }
    }
}