pragma Singleton
pragma ComponentBehavior: Bound

import QtQuick
import Quickshell
import qs.Common

Singleton {
    id: root

    property var registeredWidgets: ({})
    property var registeredWidgetsList: []

    signal registryChanged

    Component.onCompleted: {
        registerBuiltins();
        Qt.callLater(syncPluginWidgets);
    }

    Connections {
        target: PluginService
        function onPluginLoaded(pluginId) {
            const plugin = PluginService.availablePlugins[pluginId];
            if (plugin?.type === "desktop")
                syncPluginWidgets();
        }
        function onPluginUnloaded(pluginId) {
            syncPluginWidgets();
        }
        function onPluginListUpdated() {
            syncPluginWidgets();
        }
    }

    function registerBuiltins() {
        registerWidget({
            id: "desktopClock",
            name: I18n.tr("Desktop Clock", "Desktop clock widget name"),
            icon: "schedule",
            description: I18n.tr("Analog, digital, or stacked clock display", "Desktop clock widget description"),
            type: "builtin",
            component: "qs.Modules.BuiltinDesktopPlugins.DesktopClockWidget",
            settingsComponent: "qs.Modules.Settings.DesktopWidgetSettings.ClockSettings",
            defaultConfig: getDefaultClockConfig(),
            defaultSize: {
                width: 280,
                height: 180
            }
        });

        registerWidget({
            id: "systemMonitor",
            name: I18n.tr("System Monitor", "System monitor widget name"),
            icon: "monitoring",
            description: I18n.tr("CPU, memory, network, and disk monitoring", "System monitor widget description"),
            type: "builtin",
            component: "qs.Modules.BuiltinDesktopPlugins.SystemMonitorWidget",
            settingsComponent: "qs.Modules.Settings.DesktopWidgetSettings.SystemMonitorSettings",
            defaultConfig: getDefaultSystemMonitorConfig(),
            defaultSize: {
                width: 320,
                height: 480
            }
        });
    }

    function getDefaultClockConfig() {
        return {
            style: "analog",
            transparency: 0.8,
            colorMode: "primary",
            customColor: "#ffffff",
            showDate: true,
            showAnalogNumbers: false,
            showAnalogSeconds: true,
            displayPreferences: ["all"]
        };
    }

    function getDefaultSystemMonitorConfig() {
        return {
            showHeader: true,
            transparency: 0.8,
            colorMode: "primary",
            customColor: "#ffffff",
            showCpu: true,
            showCpuGraph: true,
            showCpuTemp: true,
            showGpuTemp: false,
            gpuPciId: "",
            showMemory: true,
            showMemoryGraph: true,
            showNetwork: true,
            showNetworkGraph: true,
            showDisk: true,
            showTopProcesses: false,
            topProcessCount: 3,
            topProcessSortBy: "cpu",
            layoutMode: "auto",
            graphInterval: 60,
            displayPreferences: ["all"]
        };
    }

    function registerWidget(widgetDef) {
        if (!widgetDef?.id)
            return;

        const newMap = Object.assign({}, registeredWidgets);
        newMap[widgetDef.id] = widgetDef;
        registeredWidgets = newMap;
        _updateWidgetsList();
        registryChanged();
    }

    function unregisterWidget(widgetId) {
        if (!registeredWidgets[widgetId])
            return;

        const newMap = Object.assign({}, registeredWidgets);
        delete newMap[widgetId];
        registeredWidgets = newMap;
        _updateWidgetsList();
        registryChanged();
    }

    function getWidget(widgetType) {
        return registeredWidgets[widgetType] ?? null;
    }

    function getDefaultConfig(widgetType) {
        const widget = getWidget(widgetType);
        if (!widget)
            return {};

        if (widget.type === "builtin") {
            switch (widgetType) {
            case "desktopClock":
                return getDefaultClockConfig();
            case "systemMonitor":
                return getDefaultSystemMonitorConfig();
            default:
                return widget.defaultConfig ?? {};
            }
        }

        return widget.defaultConfig ?? {};
    }

    function getDefaultSize(widgetType) {
        const widget = getWidget(widgetType);
        return widget?.defaultSize ?? {
            width: 200,
            height: 200
        };
    }

    function syncPluginWidgets() {
        const desktopPlugins = PluginService.pluginDesktopComponents;
        const availablePlugins = PluginService.availablePlugins;
        const currentPluginIds = [];

        for (const pluginId in desktopPlugins) {
            currentPluginIds.push(pluginId);
            const plugin = availablePlugins[pluginId];
            if (!plugin)
                continue;

            if (registeredWidgets[pluginId]?.type === "plugin")
                continue;

            registerWidget({
                id: pluginId,
                name: plugin.name || pluginId,
                icon: plugin.icon || "extension",
                description: plugin.description || "",
                type: "plugin",
                component: null,
                settingsComponent: plugin.settingsPath || null,
                defaultConfig: {
                    displayPreferences: ["all"]
                },
                defaultSize: {
                    width: 200,
                    height: 200
                },
                pluginInfo: plugin
            });
        }

        const toRemove = [];
        for (const widgetId in registeredWidgets) {
            const widget = registeredWidgets[widgetId];
            if (widget.type !== "plugin")
                continue;
            if (!currentPluginIds.includes(widgetId))
                toRemove.push(widgetId);
        }

        for (const widgetId of toRemove) {
            unregisterWidget(widgetId);
        }
    }

    function _updateWidgetsList() {
        const result = [];
        for (const key in registeredWidgets) {
            result.push(registeredWidgets[key]);
        }
        result.sort((a, b) => {
            if (a.type === "builtin" && b.type !== "builtin")
                return -1;
            if (a.type !== "builtin" && b.type === "builtin")
                return 1;
            return (a.name || "").localeCompare(b.name || "");
        });
        registeredWidgetsList = result;
    }

    function getBuiltinWidgets() {
        return registeredWidgetsList.filter(w => w.type === "builtin");
    }

    function getPluginWidgets() {
        return registeredWidgetsList.filter(w => w.type === "plugin");
    }

    function getAllWidgets() {
        return registeredWidgetsList;
    }
}