import QtQuick 2.5
import Qt.labs.settings 1.0

Item {
    id: appWindow

    onWidthChanged: {
        globalUtil.reset()
    }

    QtObject {
        id: globalVars
        property real goldenRatio
        property real imageWidthOverride
        property bool globalDeathTimer

        function reset() {
            goldenRatio = 1.61803398875
            imageWidthOverride = -1
            globalDeathTimer = false
        }

        Component.onCompleted: reset()
    }

    QtObject {
        id: globalUtil
        property int itemCount
        property int currentColumn: 0
        property bool primed: d.primedColumns === globalSettings.columnCount

        property int adjustedInterval: 1000*(globalSettings.interval > 60 ? 60*(globalSettings.interval-60) : Math.max(globalSettings.interval, 1))

        function registerColumnPrimed() {
            d.primedColumns++
        }

        function reset() {
            if (d.currentViewFilename) {
                globalVars.reset()
                artViewLoader.source = ""
                artViewLoader.source = d.currentViewFilename
                itemCount = currentColumn = d.primedColumns = 0
            }
        }

        function columnSelection() {
            if (globalSettings.commonFeedRoundRobin) {
                var ret = currentColumn
                currentColumn = (currentColumn + 1) % globalSettings.columnCount
                return ret
            } else {
                return Math.floor(Math.random()*globalSettings.columnCount)
            }
        }

        function columnWidthRatio(ratio, col) {
            return (1 - ratio)/(1 - Math.pow(ratio, col))
        }
    }

    QtObject {
        id: d
        property int primedColumns: 0
        property string currentViewFilename
        property string overrideViewFilename
        property bool displayUnlicensed: false

        function setView(view) {
            d.currentViewFilename = deriveViewPath(overrideViewFilename.length ? overrideViewFilename : view)
        }

        function deriveViewPath(view) {
            return "views/" + view.toLowerCase() + "/" + view + ".qml"
        }

        onCurrentViewFilenameChanged: {
            globalUtil.reset()
        }
    }

    Settings {
        id: globalSettings
        // This colCount + col ratio requires 700M graphical mem at 1080p on the pi
        property int columnCount: 8
        property int interval: 5
        property int itemLimit: -1
        property int artFrameWidth: 0

        property string effect: ""
        property string artView: "Trivial"
        property string backdrop

        property bool randomBackdropColor: false
        property bool smoothArt: false
        property bool randomlyMirrorArt: false
        property bool commonFeed: true
        property bool commonFeedRoundRobin: true
        property bool unlicensed: false
        property bool fadeInImages: true
        property bool useGoldenRatio: false
        property bool infoTray: false
        property bool rebootNecessary: true

        property real randomlyMirrorArtFreq: 0.5
        property real artOpacity: 1.0
        property real lessGoldenRatio: 1.4

        onColumnCountChanged: globalUtil.reset()

        Component.onCompleted: {
            d.setView(artView)
        }
    }

    Item {
        id: root

        focus: true
        anchors.fill: parent
        Keys.forwardTo: [artViewLoader.item, toplevelhandler]

        Loader {
            id: artViewLoader
            z: 1
            anchors.fill: parent
        }

        Component.onCompleted: {
            if (globalSettings.backdrop != "") {
                Qt.createQmlObject(globalSettings.backdrop + ' { anchors.fill: parent }', root)
            }

            if (globalSettings.rebootNecessary) {
                Qt.createQmlObject('RebootReq { z: 2; anchors { top: parent.top; right: parent.right } }', root)
            }

            if (globalSettings.infoTray) {
                Qt.createQmlObject('InfoTray { z: 2; anchors { bottom: parent.bottom; left: parent.left } }', root)
            }

            if (globalSettings.unlicensed) {
                Qt.createQmlObject('Unlicensed { z: 3 }', root)
            }
        }
    }

    Item {
        id: toplevelhandler
        focus: true
        Keys.onPressed: {
            switch(event.key) {
            case Qt.Key_Left:
                globalSettings.columnCount = Math.max(globalSettings.columnCount - 1, 1);
                break;
            case Qt.Key_Right:
                globalSettings.columnCount++;
                break;
            case Qt.Key_Escape:
                Qt.quit();
                break;
            case Qt.Key_F10:
                globalSettings.showViewItemCount = !globalSettings.showViewItemCount;
                break;
            default:
                console.log('Key not handled')
            }
        }
    }
}