pragma Singleton
pragma ComponentBehavior: Bound

import qs.config
import qs.utils
import Caelestia
import Quickshell
import Quickshell.Io
import QtQuick

Singleton {
    id: root

    property bool showPreview
    property string scheme
    property string flavour
    readonly property bool light: showPreview ? previewLight : currentLight
    property bool currentLight
    property bool previewLight
    readonly property M3Palette palette: showPreview ? preview : current
    readonly property M3TPalette tPalette: M3TPalette {}
    readonly property M3Palette current: M3Palette {}
    readonly property M3Palette preview: M3Palette {}
    readonly property Transparency transparency: Transparency {}
    property real wallLuminance

    function getLuminance(c: color): real {
        if (c.r == 0 && c.g == 0 && c.b == 0)
            return 0;
        return Math.sqrt(0.299 * (c.r ** 2) + 0.587 * (c.g ** 2) + 0.114 * (c.b ** 2));
    }

    function alterColour(c: color, a: real, layer: int): color {
        const luminance = getLuminance(c);

        const offset = (!light || layer == 1 ? 1 : -layer / 2) * (light ? 0.2 : 0.3) * (1 - transparency.base) * (1 + wallLuminance * (light ? (layer == 1 ? 3 : 1) : 2.5));
        const scale = (luminance + offset) / luminance;
        const r = Math.max(0, Math.min(1, c.r * scale));
        const g = Math.max(0, Math.min(1, c.g * scale));
        const b = Math.max(0, Math.min(1, c.b * scale));

        return Qt.rgba(r, g, b, a);
    }

    function layer(c: color, layer: var): color {
        if (!transparency.enabled)
            return c;

        return layer === 0 ? Qt.alpha(c, transparency.base) : alterColour(c, transparency.layers, layer ?? 1);
    }

    function on(c: color): color {
        if (c.hslLightness < 0.5)
            return Qt.hsla(c.hslHue, c.hslSaturation, 0.9, 1);
        return Qt.hsla(c.hslHue, c.hslSaturation, 0.1, 1);
    }

    function load(data: string, isPreview: bool): void {
        const colours = isPreview ? preview : current;
        const scheme = JSON.parse(data);

        if (!isPreview) {
            root.scheme = scheme.name;
            flavour = scheme.flavour;
            currentLight = scheme.mode === "light";
        } else {
            previewLight = scheme.mode === "light";
        }

        for (const [name, colour] of Object.entries(scheme.colours)) {
            const propName = name.startsWith("term") ? name : `m3${name}`;
            if (colours.hasOwnProperty(propName))
                colours[propName] = `#${colour}`;
        }
    }

    function setMode(mode: string): void {
        Quickshell.execDetached(["caelestia", "scheme", "set", "--notify", "-m", mode]);
    }

    FileView {
        path: `${Paths.state}/scheme.json`
        watchChanges: true
        onFileChanged: reload()
        onLoaded: root.load(text(), false)
    }

    Connections {
        target: Wallpapers

        function onCurrentChanged(): void {
            const current = Wallpapers.current;
            CUtils.getAverageLuminance(current, l => {
                if (Wallpapers.current == current)
                    root.wallLuminance = l;
            });
        }
    }

    component Transparency: QtObject {
        readonly property bool enabled: Appearance.transparency.enabled
        readonly property real base: Appearance.transparency.base - (root.light ? 0.1 : 0)
        readonly property real layers: Appearance.transparency.layers
    }

    component M3TPalette: QtObject {
        readonly property color m3primary_paletteKeyColor: root.layer(root.palette.m3primary_paletteKeyColor)
        readonly property color m3secondary_paletteKeyColor: root.layer(root.palette.m3secondary_paletteKeyColor)
        readonly property color m3tertiary_paletteKeyColor: root.layer(root.palette.m3tertiary_paletteKeyColor)
        readonly property color m3neutral_paletteKeyColor: root.layer(root.palette.m3neutral_paletteKeyColor)
        readonly property color m3neutral_variant_paletteKeyColor: root.layer(root.palette.m3neutral_variant_paletteKeyColor)
        readonly property color m3background: root.layer(root.palette.m3background, 0)
        readonly property color m3onBackground: root.layer(root.palette.m3onBackground)
        readonly property color m3surface: root.layer(root.palette.m3surface, 0)
        readonly property color m3surfaceDim: root.layer(root.palette.m3surfaceDim, 0)
        readonly property color m3surfaceBright: root.layer(root.palette.m3surfaceBright, 0)
        readonly property color m3surfaceContainerLowest: root.layer(root.palette.m3surfaceContainerLowest)
        readonly property color m3surfaceContainerLow: root.layer(root.palette.m3surfaceContainerLow)
        readonly property color m3surfaceContainer: root.layer(root.palette.m3surfaceContainer)
        readonly property color m3surfaceContainerHigh: root.layer(root.palette.m3surfaceContainerHigh)
        readonly property color m3surfaceContainerHighest: root.layer(root.palette.m3surfaceContainerHighest)
        readonly property color m3onSurface: root.layer(root.palette.m3onSurface)
        readonly property color m3surfaceVariant: root.layer(root.palette.m3surfaceVariant, 0)
        readonly property color m3onSurfaceVariant: root.layer(root.palette.m3onSurfaceVariant)
        readonly property color m3inverseSurface: root.layer(root.palette.m3inverseSurface, 0)
        readonly property color m3inverseOnSurface: root.layer(root.palette.m3inverseOnSurface)
        readonly property color m3outline: root.layer(root.palette.m3outline)
        readonly property color m3outlineVariant: root.layer(root.palette.m3outlineVariant)
        readonly property color m3shadow: root.layer(root.palette.m3shadow)
        readonly property color m3scrim: root.layer(root.palette.m3scrim)
        readonly property color m3surfaceTint: root.layer(root.palette.m3surfaceTint)
        readonly property color m3primary: root.layer(root.palette.m3primary)
        readonly property color m3onPrimary: root.layer(root.palette.m3onPrimary)
        readonly property color m3primaryContainer: root.layer(root.palette.m3primaryContainer)
        readonly property color m3onPrimaryContainer: root.layer(root.palette.m3onPrimaryContainer)
        readonly property color m3inversePrimary: root.layer(root.palette.m3inversePrimary)
        readonly property color m3secondary: root.layer(root.palette.m3secondary)
        readonly property color m3onSecondary: root.layer(root.palette.m3onSecondary)
        readonly property color m3secondaryContainer: root.layer(root.palette.m3secondaryContainer)
        readonly property color m3onSecondaryContainer: root.layer(root.palette.m3onSecondaryContainer)
        readonly property color m3tertiary: root.layer(root.palette.m3tertiary)
        readonly property color m3onTertiary: root.layer(root.palette.m3onTertiary)
        readonly property color m3tertiaryContainer: root.layer(root.palette.m3tertiaryContainer)
        readonly property color m3onTertiaryContainer: root.layer(root.palette.m3onTertiaryContainer)
        readonly property color m3error: root.layer(root.palette.m3error)
        readonly property color m3onError: root.layer(root.palette.m3onError)
        readonly property color m3errorContainer: root.layer(root.palette.m3errorContainer)
        readonly property color m3onErrorContainer: root.layer(root.palette.m3onErrorContainer)
        readonly property color m3primaryFixed: root.layer(root.palette.m3primaryFixed)
        readonly property color m3primaryFixedDim: root.layer(root.palette.m3primaryFixedDim)
        readonly property color m3onPrimaryFixed: root.layer(root.palette.m3onPrimaryFixed)
        readonly property color m3onPrimaryFixedVariant: root.layer(root.palette.m3onPrimaryFixedVariant)
        readonly property color m3secondaryFixed: root.layer(root.palette.m3secondaryFixed)
        readonly property color m3secondaryFixedDim: root.layer(root.palette.m3secondaryFixedDim)
        readonly property color m3onSecondaryFixed: root.layer(root.palette.m3onSecondaryFixed)
        readonly property color m3onSecondaryFixedVariant: root.layer(root.palette.m3onSecondaryFixedVariant)
        readonly property color m3tertiaryFixed: root.layer(root.palette.m3tertiaryFixed)
        readonly property color m3tertiaryFixedDim: root.layer(root.palette.m3tertiaryFixedDim)
        readonly property color m3onTertiaryFixed: root.layer(root.palette.m3onTertiaryFixed)
        readonly property color m3onTertiaryFixedVariant: root.layer(root.palette.m3onTertiaryFixedVariant)
    }

    component M3Palette: QtObject {
        property color m3primary_paletteKeyColor: "#a26387"
        property color m3secondary_paletteKeyColor: "#8b6f7d"
        property color m3tertiary_paletteKeyColor: "#9c6c53"
        property color m3neutral_paletteKeyColor: "#7f7478"
        property color m3neutral_variant_paletteKeyColor: "#827379"
        property color m3background: "#181115"
        property color m3onBackground: "#eddfe4"
        property color m3surface: "#181115"
        property color m3surfaceDim: "#181115"
        property color m3surfaceBright: "#40373b"
        property color m3surfaceContainerLowest: "#130c10"
        property color m3surfaceContainerLow: "#211a1d"
        property color m3surfaceContainer: "#251e21"
        property color m3surfaceContainerHigh: "#30282b"
        property color m3surfaceContainerHighest: "#3b3236"
        property color m3onSurface: "#eddfe4"
        property color m3surfaceVariant: "#504349"
        property color m3onSurfaceVariant: "#d3c2c9"
        property color m3inverseSurface: "#eddfe4"
        property color m3inverseOnSurface: "#362e32"
        property color m3outline: "#9c8d93"
        property color m3outlineVariant: "#504349"
        property color m3shadow: "#000000"
        property color m3scrim: "#000000"
        property color m3surfaceTint: "#fbb1d8"
        property color m3primary: "#fbb1d8"
        property color m3onPrimary: "#511d3e"
        property color m3primaryContainer: "#6b3455"
        property color m3onPrimaryContainer: "#ffd8ea"
        property color m3inversePrimary: "#864b6e"
        property color m3secondary: "#dfbecd"
        property color m3onSecondary: "#402a36"
        property color m3secondaryContainer: "#5a424f"
        property color m3onSecondaryContainer: "#fcd9e9"
        property color m3tertiary: "#f3ba9c"
        property color m3onTertiary: "#4a2713"
        property color m3tertiaryContainer: "#b8856a"
        property color m3onTertiaryContainer: "#000000"
        property color m3error: "#ffb4ab"
        property color m3onError: "#690005"
        property color m3errorContainer: "#93000a"
        property color m3onErrorContainer: "#ffdad6"
        property color m3primaryFixed: "#ffd8ea"
        property color m3primaryFixedDim: "#fbb1d8"
        property color m3onPrimaryFixed: "#370728"
        property color m3onPrimaryFixedVariant: "#6b3455"
        property color m3secondaryFixed: "#fcd9e9"
        property color m3secondaryFixedDim: "#dfbecd"
        property color m3onSecondaryFixed: "#291520"
        property color m3onSecondaryFixedVariant: "#58404c"
        property color m3tertiaryFixed: "#ffdbca"
        property color m3tertiaryFixedDim: "#f3ba9c"
        property color m3onTertiaryFixed: "#311302"
        property color m3onTertiaryFixedVariant: "#653d27"
        property color term0: "#353434"
        property color term1: "#fe45a7"
        property color term2: "#ffbac0"
        property color term3: "#ffdee3"
        property color term4: "#b3a2d5"
        property color term5: "#e491bd"
        property color term6: "#ffba93"
        property color term7: "#edd2d5"
        property color term8: "#b29ea1"
        property color term9: "#ff7db7"
        property color term10: "#ffd2d5"
        property color term11: "#fff1f2"
        property color term12: "#babfdd"
        property color term13: "#f3a9cd"
        property color term14: "#ffd1c0"
        property color term15: "#ffffff"
    }
}