import QtQuick
import qs.Common
import qs.Services
import qs.Widgets

DankOSD {
    id: root

    readonly property bool useVertical: isVerticalLayout
    property int _displayVolume: 0

    function _syncVolume() {
        if (!AudioService.sink?.audio)
            return;
        _displayVolume = Math.min(AudioService.sinkMaxVolume, Math.round(AudioService.sink.audio.volume * 100));
    }

    osdWidth: useVertical ? (40 + Theme.spacingS * 2) : Math.min(260, Screen.width - Theme.spacingM * 2)
    osdHeight: useVertical ? Math.min(260, Screen.height - Theme.spacingM * 2) : (40 + Theme.spacingS * 2)
    autoHideInterval: 3000
    enableMouseInteraction: true

    Connections {
        target: AudioService.sink?.audio ?? null

        function onVolumeChanged() {
            root._syncVolume();
            if (SettingsData.osdVolumeEnabled)
                root.show();
        }

        function onMutedChanged() {
            if (SettingsData.osdVolumeEnabled)
                root.show();
        }
    }

    Connections {
        target: AudioService

        function onSinkChanged() {
            root._syncVolume();
            if (root.shouldBeVisible && SettingsData.osdVolumeEnabled)
                root.show();
        }
    }

    content: Loader {
        anchors.fill: parent
        sourceComponent: useVertical ? verticalContent : horizontalContent
    }

    Component {
        id: horizontalContent

        Item {
            property int gap: Theme.spacingS

            anchors.centerIn: parent
            width: parent.width - Theme.spacingS * 2
            height: 40

            Rectangle {
                width: Theme.iconSize
                height: Theme.iconSize
                radius: Theme.iconSize / 2
                color: "transparent"
                x: parent.gap
                anchors.verticalCenter: parent.verticalCenter

                DankIcon {
                    anchors.centerIn: parent
                    name: AudioService.sink?.audio?.muted ? "volume_off" : "volume_up"
                    size: Theme.iconSize
                    color: muteButton.containsMouse ? Theme.primary : Theme.surfaceText
                }

                MouseArea {
                    id: muteButton

                    anchors.fill: parent
                    hoverEnabled: true
                    cursorShape: Qt.PointingHandCursor
                    onClicked: AudioService.toggleMute()
                    onContainsMouseChanged: setChildHovered(containsMouse || volumeSlider.containsMouse)
                }
            }

            DankSlider {
                id: volumeSlider

                width: parent.width - Theme.iconSize - parent.gap * 3
                height: 40
                x: parent.gap * 2 + Theme.iconSize
                anchors.verticalCenter: parent.verticalCenter
                minimum: 0
                maximum: AudioService.sinkMaxVolume
                enabled: AudioService.sink?.audio ?? false
                showValue: true
                unit: "%"
                thumbOutlineColor: Theme.surfaceContainer
                valueOverride: root._displayVolume
                alwaysShowValue: SettingsData.osdAlwaysShowValue

                Component.onCompleted: {
                    root._syncVolume();
                    value = root._displayVolume;
                }

                onSliderValueChanged: newValue => {
                    if (!AudioService.sink?.audio)
                        return;
                    SessionData.suppressOSDTemporarily();
                    AudioService.sink.audio.volume = newValue / 100;
                    resetHideTimer();
                }

                onContainsMouseChanged: setChildHovered(containsMouse || muteButton.containsMouse)

                Binding on value {
                    value: root._displayVolume
                    when: !volumeSlider.pressed
                }
            }
        }
    }

    Component {
        id: verticalContent

        Item {
            anchors.fill: parent
            property int gap: Theme.spacingS

            Rectangle {
                width: Theme.iconSize
                height: Theme.iconSize
                radius: Theme.iconSize / 2
                color: "transparent"
                anchors.horizontalCenter: parent.horizontalCenter
                y: gap

                DankIcon {
                    anchors.centerIn: parent
                    name: AudioService.sink?.audio?.muted ? "volume_off" : "volume_up"
                    size: Theme.iconSize
                    color: muteButtonVert.containsMouse ? Theme.primary : Theme.surfaceText
                }

                MouseArea {
                    id: muteButtonVert

                    anchors.fill: parent
                    hoverEnabled: true
                    cursorShape: Qt.PointingHandCursor
                    onClicked: AudioService.toggleMute()
                    onContainsMouseChanged: setChildHovered(containsMouse || vertSliderArea.containsMouse)
                }
            }

            Item {
                id: vertSlider
                width: 12
                height: parent.height - Theme.iconSize - gap * 3 - 24
                anchors.horizontalCenter: parent.horizontalCenter
                y: gap * 2 + Theme.iconSize

                property bool dragging: false
                property int value: root._displayVolume

                Rectangle {
                    id: vertTrack
                    width: parent.width
                    height: parent.height
                    anchors.centerIn: parent
                    color: Theme.outline
                    radius: Theme.cornerRadius
                }

                Rectangle {
                    id: vertFill
                    width: parent.width
                    height: (vertSlider.value / AudioService.sinkMaxVolume) * parent.height
                    anchors.bottom: parent.bottom
                    anchors.horizontalCenter: parent.horizontalCenter
                    color: Theme.primary
                    radius: Theme.cornerRadius
                }

                Rectangle {
                    id: vertHandle
                    width: 24
                    height: 8
                    radius: Theme.cornerRadius
                    y: {
                        const ratio = vertSlider.value / AudioService.sinkMaxVolume;
                        const travel = parent.height - height;
                        return Math.max(0, Math.min(travel, travel * (1 - ratio)));
                    }
                    anchors.horizontalCenter: parent.horizontalCenter
                    color: Theme.primary
                    border.width: 3
                    border.color: Theme.surfaceContainer
                }

                MouseArea {
                    id: vertSliderArea
                    anchors.fill: parent
                    anchors.margins: -12
                    enabled: AudioService.sink?.audio ?? false
                    hoverEnabled: true
                    cursorShape: Qt.PointingHandCursor

                    onContainsMouseChanged: setChildHovered(containsMouse || muteButtonVert.containsMouse)

                    onPressed: mouse => {
                        vertSlider.dragging = true;
                        updateVolume(mouse);
                    }

                    onReleased: vertSlider.dragging = false

                    onPositionChanged: mouse => {
                        if (pressed)
                            updateVolume(mouse);
                    }

                    onClicked: mouse => updateVolume(mouse)

                    function updateVolume(mouse) {
                        if (!AudioService.sink?.audio)
                            return;
                        const maxVol = AudioService.sinkMaxVolume;
                        const ratio = 1.0 - (mouse.y / height);
                        const volume = Math.max(0, Math.min(maxVol, Math.round(ratio * maxVol)));
                        SessionData.suppressOSDTemporarily();
                        AudioService.sink.audio.volume = volume / 100;
                        resetHideTimer();
                    }
                }
            }

            StyledText {
                anchors.bottom: parent.bottom
                anchors.horizontalCenter: parent.horizontalCenter
                anchors.bottomMargin: gap
                text: vertSlider.value + "%"
                font.pixelSize: Theme.fontSizeSmall
                color: Theme.surfaceText
                visible: SettingsData.osdAlwaysShowValue
            }
        }
    }
}
