pragma Singleton
pragma ComponentBehavior: Bound

import QtCore
import QtQuick
import Quickshell
import qs.Common

Singleton {
    id: root

    readonly property string configDir: Paths.strip(StandardPaths.writableLocation(StandardPaths.ConfigLocation))
    readonly property string hyprDmsDir: configDir + "/hypr/dms"
    readonly property string outputsPath: hyprDmsDir + "/outputs.conf"

    function getOutputIdentifier(output, outputName) {
        if (SettingsData.displayNameMode === "model" && output.make && output.model) {
            return "desc:" + output.make + " " + output.model;
        }
        return outputName;
    }

    function generateOutputsConfig(outputsData) {
        if (!outputsData || Object.keys(outputsData).length === 0)
            return;
        let lines = ["# Auto-generated by DMS - do not edit manually", ""];

        for (const outputName in outputsData) {
            const output = outputsData[outputName];
            if (!output)
                continue;
            let resolution = "preferred";
            if (output.modes && output.current_mode !== undefined) {
                const mode = output.modes[output.current_mode];
                if (mode)
                    resolution = mode.width + "x" + mode.height + "@" + (mode.refresh_rate / 1000).toFixed(3);
            }

            const x = output.logical?.x ?? 0;
            const y = output.logical?.y ?? 0;
            const position = x + "x" + y;

            const scale = output.logical?.scale ?? 1.0;

            const identifier = getOutputIdentifier(output, outputName);
            let monitorLine = "monitor = " + identifier + ", " + resolution + ", " + position + ", " + scale;

            const transform = transformToHyprland(output.logical?.transform ?? "Normal");
            if (transform !== 0)
                monitorLine += ", transform, " + transform;

            if (output.vrr_supported && output.vrr_enabled)
                monitorLine += ", vrr, 1";

            lines.push(monitorLine);
        }

        lines.push("");

        const content = lines.join("\n");

        Proc.runCommand("hypr-write-outputs", ["sh", "-c", `mkdir -p "${hyprDmsDir}" && cat > "${outputsPath}" << 'EOF'\n${content}EOF`], (output, exitCode) => {
            if (exitCode !== 0) {
                console.warn("HyprlandService: Failed to write outputs config:", output);
                return;
            }
            console.info("HyprlandService: Generated outputs config at", outputsPath);
            if (CompositorService.isHyprland)
                reloadConfig();
        });
    }

    function reloadConfig() {
        Proc.runCommand("hyprctl-reload", ["hyprctl", "reload"], (output, exitCode) => {
            if (exitCode !== 0)
                console.warn("HyprlandService: hyprctl reload failed:", output);
        });
    }

    function transformToHyprland(transform) {
        switch (transform) {
        case "Normal":
            return 0;
        case "90":
            return 1;
        case "180":
            return 2;
        case "270":
            return 3;
        case "Flipped":
            return 4;
        case "Flipped90":
            return 5;
        case "Flipped180":
            return 6;
        case "Flipped270":
            return 7;
        default:
            return 0;
        }
    }

    function hyprlandToTransform(value) {
        switch (value) {
        case 0:
            return "Normal";
        case 1:
            return "90";
        case 2:
            return "180";
        case 3:
            return "270";
        case 4:
            return "Flipped";
        case 5:
            return "Flipped90";
        case 6:
            return "Flipped180";
        case 7:
            return "Flipped270";
        default:
            return "Normal";
        }
    }
}