import QtQuick 2.12
import QtGraphicalEffects 1.12
import NERvGear.Preferences 1.0 as P

import "../../qml/api"

AdvpStyleTemplate {
    style: Rectangle {
        id: main
        width: widget.width;
        height: widget.height;

        property bool gradientEnable

        LinearGradient {
            id: gradient_mask
            anchors.fill: parent
            visible: gradientEnable
            gradient: Gradient {
                GradientStop { id: p_start;  position: 0.0 }
                GradientStop { id: p_middle;  position: 0.5 }
                GradientStop { id: p_end; position: 1.0 }
            }
        }

        layer.enabled: true
        layer.effect: OpacityMask{
            maskSource: AdvpCanvasTemplate {
                readonly property var audioData: new Array(128)

                readonly property bool autoNormalizing: configs["Data Settings"]["Auto Normalizing"]
                readonly property real amplitude: 400/configs["Data Settings"]["Amplitude"]

                readonly property int uDataLen: Math.pow(2, configs["Data Length"]);
                readonly property int dataLength: 64/uDataLen
                readonly property int unitStyle: configs["Data Settings"]["Unit Style"]

                readonly property int total: dataLength*2

                readonly property bool vertical_flag: configs["Direction"]
                readonly property real halfWidth: vertical_flag ? height/2 : width/2
                readonly property real halfHeight: vertical_flag ? width/2 : height/2
                readonly property real ux: halfWidth*2/(total+1)
                readonly property real _y_dy: centerRotateAngleTangent*halfWidth

                readonly property bool centerRotateFlag: configs["Rotate Settings"]["Center Enable"]
                readonly property real centerRotateAngleTangent: centerRotateFlag*Math.tan(configs["Rotate Settings"]["Center Angle"]*Math.PI/180)
                readonly property bool lineRotateFlag: configs["Rotate Settings"]["Line Enable"]
                readonly property real lineRotateAngleTangent: lineRotateFlag*Math.tan(configs["Rotate Settings"]["Line Angle"]*Math.PI/180)

                readonly property real xOffset: configs["Rotate Settings"]["X Offset"]/100
                readonly property real yOffset: configs["Rotate Settings"]["Y Offset"]/100
                readonly property real xScale: configs["Rotate Settings"]["X Scale"]/100
                readonly property real yScale: configs["Rotate Settings"]["Y Scale"]/100

                onWidthChanged: {
                    gradient_mask.end = Qt.point(width*(configs["Gradient Direction"]!==1), height*(configs["Gradient Direction"]%2));
                }

                onHeightChanged: {
                    gradient_mask.start = Qt.point(0, height*(configs["Gradient Direction"]===2));
                    gradient_mask.end = Qt.point(width*(configs["Gradient Direction"]!==1), height*(configs["Gradient Direction"]%2));
                }

                onConfigsUpdated: {
                    //尽量不要使用绑定configs的属性以免造成竞争，若一定要使用推荐使用Qt.callLater(()=>{})
                    gradientEnable = configs["Enable Gradient"];
                    context.lineWidth = configs["Line Width"];
                    main.color = configs["Line Color"];
                    if (gradientEnable) {
                        gradient_mask.start = Qt.point(0, height*(configs["Gradient Direction"]===2));
                        gradient_mask.end = Qt.point(width*(configs["Gradient Direction"]!==1), height*(configs["Gradient Direction"]%2));
                        p_start.color = configs["Start Position Color"];
                        p_middle.color = configs["Middle Position Color"];
                        p_end.color = configs["End Position Color"];
                    }
                }

                onAudioDataUpdeted: {
                    let normalizing_ratio = autoNormalizing ? data[128]*2 : amplitude;
                    if (unitStyle) {
                        //对数化显示
                        for(let i=0; i<dataLength; i++) {
                            audioData[i] = 0;
                            for(let j=0; j<uDataLen; j++) {
                                audioData[i] += Math.max(0, 0.4 * (Math.log10(data[63-i*uDataLen-j]/normalizing_ratio)) + 1.0);
                            }
                            audioData[i] /= uDataLen;
                        }
                        for(let i=dataLength; i<total; i++) {
                            audioData[i] = 0;
                            for(let j=0; j<uDataLen; j++) {
                                audioData[i] += Math.max(0, 0.4 * (Math.log10(data[i*uDataLen+j]/normalizing_ratio)) + 1.0);
                            }
                            audioData[i] /= uDataLen;
                        }
                    } else {
                        //线性化显示
                        for(let i=0; i<dataLength; i++) {
                            audioData[i] = 0;
                            for(let j=0; j<uDataLen; j++) {
                                audioData[i] += data[63-i*uDataLen-j];
                            }
                            audioData[i] /= (uDataLen * normalizing_ratio);
                        }
                        for(let i=dataLength; i<total; i++) {
                            audioData[i] = 0;
                            for(let j=0; j<uDataLen; j++) {
                                audioData[i] += data[i*uDataLen+j];
                            }
                            audioData[i] /= (uDataLen * normalizing_ratio);
                        }
                    }

                    context.clearRect(0, 0, width+32, height+32);
                    context.beginPath();
                    context.resetTransform();
                    if (vertical_flag) {
                        if (lineRotateFlag || centerRotateFlag) {
                            context.transform(yScale, lineRotateAngleTangent, -centerRotateAngleTangent, xScale, _y_dy+yOffset*height, xOffset*width-lineRotateAngleTangent*(halfHeight));
                        }
                        context.moveTo(halfHeight, 0);

                        for (let i=0; i<dataLength*2; i+=2) {
                            context.lineTo(halfHeight*(1+audioData[i]), ux*i);
                            context.lineTo(halfHeight*(1-audioData[i+1]), ux*(i+1));
                        }

                        context.lineTo(halfHeight, height);
                    } else {
                        if (lineRotateFlag || centerRotateFlag) {
                            context.transform(xScale, centerRotateAngleTangent, -lineRotateAngleTangent, yScale, xOffset*width+lineRotateAngleTangent*(halfHeight), yOffset*height-_y_dy);
                        }
                        context.moveTo(0, halfHeight);

                        for (let i=0; i<dataLength*2; i+=2) {
                            context.lineTo(ux*i, halfHeight*(1+audioData[i]));
                            context.lineTo(ux*(i+1), halfHeight*(1-audioData[i+1]));
                        }

                        context.lineTo(width, halfHeight);
                    }
                    context.stroke();
                    requestPaint();
                }

                onCompleted: {
                    for (let i = 0; i < 128; i++) {
                        audioData[i] = 0;
                    }
                }
            }
        }
    }

    defaultValues: {
        "Version": "1.2.0",
        "Enable Gradient": false,
        "Gradient Direction": 0,
        "Start Position Color": "#f44336",
        "Middle Position Color": "#4caf50",
        "End Position Color": "#03a9f4",
        "Line Color": "#ff4500",
        "Line Width": 1,
        "Data Length": 0,
        "Direction": 0,
        "Rotate Settings": {
            "Center Enable": false,
            "Center Angle": 10,
            "Line Enable": false,
            "Line Angle": 10,
            "X Scale": 100,
            "Y Scale": 100,
            "X Offset": 0,
            "Y Offset": 0
        },
        "Data Settings": {
            "Auto Normalizing": true,
            "Amplitude": 10,
            "Unit Style": 0
        }
    }

    preference: AdvpPreference {
        version: defaultValues["Version"]

        P.SwitchPreference {
            id: _cfg_enable_gradient
            name: "Enable Gradient"
            label: qsTr("Enable Gradient")
            defaultValue: defaultValues["Enable Gradient"]
        }

        P.SelectPreference {
            name: "Gradient Direction"
            label: qsTr("Gradient Direction")
            visible: _cfg_enable_gradient.value
            defaultValue: defaultValues["Gradient Direction"]
            model: [qsTr("Horizontal"), qsTr("Vertical"), qsTr("Oblique Upward"), qsTr("Oblique downward")]
        }

        P.ColorPreference {
            name: "Start Position Color"
            label: qsTr("Start Position Color")
            visible: _cfg_enable_gradient.value
            defaultValue: defaultValues["Start Position Color"]
        }

        P.ColorPreference {
            name: "Middle Position Color"
            label: qsTr("Middle Position Color")
            visible: _cfg_enable_gradient.value
            defaultValue: defaultValues["Middle Position Color"]
        }

        P.ColorPreference {
            name: "End Position Color"
            label: qsTr("End Position Color")
            visible: _cfg_enable_gradient.value
            defaultValue: defaultValues["End Position Color"]
        }

        P.Separator {}

        P.SelectPreference {
            name: "Direction"
            label: qsTr("Direction")
            defaultValue: defaultValues["Direction"]
            model: [qsTr("Horizontal"), qsTr("Vertical")]
        }

        P.ColorPreference {
            name: "Line Color"
            label: qsTr("Spectrum Line Color")
            visible: !_cfg_enable_gradient.value
            defaultValue: defaultValues["Line Color"]
        }

        P.SliderPreference {
            name: "Line Width"
            label: qsTr("Spectrum Line Width")
            from: 0.1
            to: 4
            stepSize: 0.1
            defaultValue: defaultValues["Line Width"]
            displayValue: value.toFixed(1) + "px"
        }

        P.SelectPreference {
            name: "Data Length"
            label: qsTr("Spectrum Length")
            defaultValue: defaultValues["Data Length"]
            model: [64, 32, 16, 8]
        }

        P.Separator {}

        P.DialogPreference {
            name: "Rotate Settings"
            label: qsTr("Rotate Settings")
            live: true
            icon.name: "regular:\uf1de"

            P.SwitchPreference {
                id: _cfg_preset_line_Rotate_Center_Enable
                name: "Center Enable"
                label: qsTr("Rotate Center Line")
                defaultValue: defaultValues["Rotate Settings"]["Center Enable"]
            }

            P.SliderPreference {
                name: "Center Angle"
                label: qsTr("Angle of Center Line")
                enabled: _cfg_preset_line_Rotate_Center_Enable.value
                from: -45
                to: 45
                stepSize: 1
                defaultValue: defaultValues["Rotate Settings"]["Center Angle"]
                displayValue: value + "°"
            }

            P.Separator {}

            P.SwitchPreference {
                id: _cfg_preset_line_Rotate_Line_Enable
                name: "Line Enable"
                label: qsTr("Rotate Spectrum Line")
                defaultValue: defaultValues["Rotate Settings"]["Line Enable"]
            }

            P.SliderPreference {
                name: "Line Angle"
                label: qsTr("Angle of Spectrum Line")
                enabled: _cfg_preset_line_Rotate_Line_Enable.value
                from: -45
                to: 45
                stepSize: 1
                defaultValue: defaultValues["Rotate Settings"]["Line Angle"]
                displayValue: value + "°"
            }

            P.Separator {}

            P.SliderPreference {
                name: "X Scale"
                label: qsTr("Scale of Center Line Direction")
                enabled: _cfg_preset_line_Rotate_Line_Enable.value || _cfg_preset_line_Rotate_Center_Enable.value
                from: 1
                to: 100
                stepSize: 1
                defaultValue: defaultValues["Rotate Settings"]["X Scale"]
                displayValue: value + "%"
            }

            P.SliderPreference {
                name: "Y Scale"
                label: qsTr("Scale of Spectrum Line Direction")
                enabled: _cfg_preset_line_Rotate_Line_Enable.value || _cfg_preset_line_Rotate_Center_Enable.value
                from: 1
                to: 100
                stepSize: 1
                defaultValue: defaultValues["Rotate Settings"]["Y Scale"]
                displayValue: value + "%"
            }

            P.SliderPreference {
                name: "X Offset"
                label: qsTr("Offset of Center Line Direction")
                enabled: _cfg_preset_line_Rotate_Line_Enable.value || _cfg_preset_line_Rotate_Center_Enable.value
                from: -100
                to: 100
                stepSize: 1
                defaultValue: defaultValues["Rotate Settings"]["X Offset"]
                displayValue: value + "%"
            }

            P.SliderPreference {
                name: "Y Offset"
                label: qsTr("Offset of Spectrum Line Direction")
                enabled: _cfg_preset_line_Rotate_Line_Enable.value || _cfg_preset_line_Rotate_Center_Enable.value
                from: -100
                to: 100
                stepSize: 1
                defaultValue: defaultValues["Rotate Settings"]["Y Offset"]
                displayValue: value + "%"
            }
        }

        P.Separator {}

        P.DialogPreference {
            name: "Data Settings"
            label: qsTr("Data Settings")
            live: true
            icon.name: "regular:\uf1de"

            P.SwitchPreference {
                id: _cfg_preset_line_dataSettings_autoNormalizing
                name: "Auto Normalizing"
                label: qsTr("Auto Normalizing")
                defaultValue: defaultValues["Data Settings"]["Auto Normalizing"]
            }

            P.SpinPreference {
                name: "Amplitude"
                label: qsTr("Amplitude Ratio")
                enabled: !_cfg_preset_line_dataSettings_autoNormalizing.value
                message: "1 to 100"
                display: P.TextFieldPreference.ExpandLabel
                editable: true
                from: 1
                to: 100
                defaultValue: defaultValues["Data Settings"]["Amplitude"]
            }

            P.Separator {}

            P.SelectPreference {
                name: "Unit Style"
                label: qsTr("Display Style")
                defaultValue: defaultValues["Data Settings"]["Unit Style"]
                model: [qsTr("Linear"), qsTr("Decibel")]
            }
        }
    }
}