import QtQuick
import Quickshell
import Quickshell.Wayland
import "." as M

PanelWindow {
    id: root

    required property var screen

    color: "transparent"

    WlrLayershell.layer: WlrLayer.Background
    WlrLayershell.exclusiveZone: -1
    WlrLayershell.namespace: "nova-overview-backdrop"
    mask: Region {}

    anchors.top: true
    anchors.left: true
    anchors.right: true
    anchors.bottom: true

    // Slow drifting gradient background
    Rectangle {
        anchors.fill: parent
        property real _phase: 0
        NumberAnimation on _phase {
            from: 0
            to: 360
            duration: 30000
            loops: Animation.Infinite
        }
        gradient: Gradient {
            orientation: Gradient.Horizontal
            GradientStop {
                position: 0
                color: Qt.rgba(M.Theme.base0C.r, M.Theme.base0C.g, M.Theme.base0C.b, 0.25)
            }
            GradientStop {
                position: 0.5
                color: Qt.rgba(M.Theme.base0E.r, M.Theme.base0E.g, M.Theme.base0E.b, 0.15)
            }
            GradientStop {
                position: 1
                color: Qt.rgba(M.Theme.base09.r, M.Theme.base09.g, M.Theme.base09.b, 0.25)
            }
        }
    }

    // Scanning line — slow horizontal sweep
    Rectangle {
        id: scanLine
        width: 2
        height: parent.height
        opacity: 0.3
        color: M.Theme.base0D

        NumberAnimation on x {
            from: 0
            to: root.width
            duration: 8000
            loops: Animation.Infinite
            easing.type: Easing.InOutSine
        }

        // Glow trail
        Rectangle {
            anchors.top: parent.top
            anchors.bottom: parent.bottom
            anchors.right: parent.left
            width: 60
            gradient: Gradient {
                orientation: Gradient.Horizontal
                GradientStop {
                    position: 0
                    color: "transparent"
                }
                GradientStop {
                    position: 1
                    color: Qt.rgba(M.Theme.base0D.r, M.Theme.base0D.g, M.Theme.base0D.b, 0.15)
                }
            }
        }
    }

    // Vertical scan line — slower
    Rectangle {
        id: vScanLine
        width: parent.width
        height: 1
        opacity: 0.2
        color: M.Theme.base0E

        NumberAnimation on y {
            from: 0
            to: root.height
            duration: 12000
            loops: Animation.Infinite
            easing.type: Easing.InOutSine
        }
    }

    // Floating hex grid
    Canvas {
        anchors.fill: parent
        opacity: 0.15

        onPaint: {
            const ctx = getContext("2d");
            const w = width, h = height;
            ctx.clearRect(0, 0, w, h);
            ctx.strokeStyle = M.Theme.base05.toString();
            ctx.lineWidth = 0.5;

            const size = 40;
            const dx = size * 1.5;
            const dy = size * Math.sqrt(3);

            for (let col = -1; col < w / dx + 1; col++) {
                for (let row = -1; row < h / dy + 1; row++) {
                    const cx = col * dx;
                    const cy = row * dy + (col % 2 ? dy / 2 : 0);
                    ctx.beginPath();
                    for (let i = 0; i < 6; i++) {
                        const angle = Math.PI / 3 * i - Math.PI / 6;
                        const px = cx + size * 0.5 * Math.cos(angle);
                        const py = cy + size * 0.5 * Math.sin(angle);
                        if (i === 0)
                            ctx.moveTo(px, py);
                        else
                            ctx.lineTo(px, py);
                    }
                    ctx.closePath();
                    ctx.stroke();
                }
            }
        }
    }
}