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import QtQuick 2.11
import QtQuick.Templates 2.4 as T
import QtQuick.Controls.Material 2.4
import QtQuick.Controls.Material.impl 2.4
import "../polyconst.js" as Constants

T.Slider {
    id: control
    property string title
    property color accent: Material.foreground
    property bool show_labels: true
    property bool is_log: false

    implicitWidth: Math.max(background ? background.implicitWidth : 0,
                           (handle ? handle.implicitWidth : 0) + leftPadding + rightPadding)
    implicitHeight: Math.max(background ? background.implicitHeight : 0,
                            (handle ? handle.implicitHeight : 0) + topPadding + bottomPadding)

    padding: 6

	function logslider(position) {
		// linear in to log out
		// input position will be between 0 and 1
		var minp = 0;
		var maxp = 1;

		// The output result should be between 20 an 20000
		var minv = Math.log(20);
		var maxv = Math.log(20000);

		// calculate adjustment factor
		var scale = (maxv-minv) / (maxp-minp);

		return Math.exp(minv + scale*(position-minp));
	}

	function logposition(value) {
		// log in to linear out
		// input position will be between 0 and 1
		var minp = 0;
		var maxp = 1;

		// The output result should be between 20 an 200000
		var minv = Math.log(20);
		var maxv = Math.log(20000);

		// calculate adjustment factor
		var scale = (maxv-minv) / (maxp-minp);

		return (Math.log(value)-minv) / scale + minp;
	}

    function format_value(value){
        // console.log("value is", value, "is log", control.is_log);
        var v;
        if (control.is_log){
            v = logslider(value);
        } else {
            v = value;
        }
        return v.toFixed(control.stepSize == 1.0 && control.title != "pitch" ? 0 : 2)
    
    }

    onPressedChanged: {
        if (pressed){
            title_footer.show_footer_value = true
        }
        else {
            title_footer.show_footer_value = false
        }
    }
    onMoved: {
        title_footer.current_footer_value = value
    }

	Text { 
		visible: control.show_labels
        // anchors.centerIn: parent
        x: control.leftPadding + (control.horizontal ? handle.width + padding : (control.availableWidth - width) / 2)
        y: control.topPadding + (control.horizontal ? (control.availableHeight - height) / 2 : control.availableHeight + 20 )
        text: title + (control.horizontal ? "  "+format_value(control.value) : "")
        // height: 15
        color: "white"
        horizontalAlignment: Text.AlignHCenter
        verticalAlignment: Text.AlignVCenter
        font {
            // pixelSize: fontSizeMedium
            pixelSize: 24
            capitalization: Font.AllUppercase
            family: mainFont.name
        }
        z: 10
    }

    Text {
        visible : !(control.horizontal) && control.show_labels
        // anchors.centerIn: parent
        x: control.leftPadding + (control.horizontal ? handle.width + padding : (control.availableWidth - width) / 2)
        y: control.topPadding + (control.horizontal ? (control.availableHeight - height) / 2 : control.availableHeight + 45 ) 
        text: format_value(control.value)
        // height: 15
        color: accent
        horizontalAlignment: Text.AlignHCenter
        verticalAlignment: Text.AlignVCenter
        font {
            // pixelSize: fontSizeMedium
            pixelSize: 30
            capitalization: Font.AllUppercase
            family: mainFont.name
        }
        z: 10
    }

    handle: Rectangle {
        x: control.leftPadding + (control.horizontal ? control.visualPosition * (control.availableWidth - width) : (control.availableWidth - width) / 2)
        y: control.topPadding + (control.horizontal ? (control.availableHeight - height) / 2 : control.visualPosition * (control.availableHeight - height))
        // value: control.value
        // handleHasFocus: control.visualFocus
        // handlePressed: control.pressed
        // handleHovered: control.hovered
        id: handleRect
        width: control.horizontal ? 25 : 46
        height: control.horizontal ? control.availableHeight - 1 : 46
        radius: control.horizontal ? 6 : 23
        color: accent
        scale: control.pressed ? 1.5 : 1


        Behavior on scale {
            NumberAnimation {
                duration: 250
            }
        }

    }

    // handle: Rectangle {
    //     x: control.leftPadding + (control.horizontal ? control.visualPosition * (control.availableWidth - width) : (control.availableWidth - width) / 2)
    //     y: control.topPadding + (control.horizontal ? (control.availableHeight - height) / 2 : control.visualPosition * (control.availableHeight - height))
    //     // value: control.value
    //     height: 25
    //     width: 25
    // } 

    background: Rectangle {
        x: control.leftPadding + (control.horizontal ? 0 : (control.availableWidth - width) / 2)
        y: control.topPadding + (control.horizontal ? (control.availableHeight - height) / 2 : 0)
        implicitWidth: control.horizontal ? 420 : 56
        implicitHeight: control.horizontal ? 56 : 420
        // width: control.horizontal ? control.availableWidth : 30
        // height: control.horizontal ? 30 : control.availableHeight
        width: control.availableWidth 
        height: control.availableHeight
        color: control.Material.background
        border { 
            width:control.horizontal ? 2 : 0;
            color: accent;
        }
        scale: control.horizontal && control.mirrored ? -1 : 1
        radius: 6
        

        Rectangle {
            visible: !control.horizontal
            x: (parent.width - width) / 2
            y: 0
            radius: 3
            // y: control.visualPosition * parent.height
            width: 10
            // height: control.position * parent.height
            height: parent.height
            color: Constants.outline_color
        }
    }
}