pragma Singleton
pragma ComponentBehavior: Bound

import QtCore
import QtQuick
import Quickshell
import Quickshell.Io

Singleton {

    id: root

    property var appUsageRanking: {}

    Component.onCompleted: {
        loadSettings();
    }

    function loadSettings() {
        parseSettings(settingsFile.text());
    }

    function parseSettings(content) {
        try {
            if (content && content.trim()) {
                var settings = JSON.parse(content);
                appUsageRanking = settings.appUsageRanking || {};
            }
        } catch (e) {
        }
    }

    function saveSettings() {
        settingsFile.setText(JSON.stringify({
            "appUsageRanking": appUsageRanking
        }, null, 2));
    }

    function addAppUsage(app) {
        if (!app)
            return;

        var appId = app.id || (app.execString || app.exec || "");
        if (!appId)
            return;

        var currentRanking = Object.assign({}, appUsageRanking);
        
        if (currentRanking[appId]) {
            currentRanking[appId].usageCount = (currentRanking[appId].usageCount || 1) + 1;
            currentRanking[appId].lastUsed = Date.now();
            currentRanking[appId].icon = app.icon || currentRanking[appId].icon || "application-x-executable";
            currentRanking[appId].name = app.name || currentRanking[appId].name || "";
        } else {
            currentRanking[appId] = {
                "name": app.name || "",
                "exec": app.execString || app.exec || "",
                "icon": app.icon || "application-x-executable",
                "comment": app.comment || "",
                "usageCount": 1,
                "lastUsed": Date.now()
            };
        }
        
        appUsageRanking = currentRanking;
        saveSettings();
    }

    function getAppUsageRanking() {
        return appUsageRanking;
    }

    function getRankedApps() {
        var apps = [];
        for (var appId in appUsageRanking) {
            var appData = appUsageRanking[appId];
            apps.push({
                id: appId,
                name: appData.name,
                exec: appData.exec,
                icon: appData.icon,
                comment: appData.comment,
                usageCount: appData.usageCount,
                lastUsed: appData.lastUsed
            });
        }
        
        return apps.sort(function(a, b) {
            if (a.usageCount !== b.usageCount)
                return b.usageCount - a.usageCount;
            return a.name.localeCompare(b.name);
        });
    }

    function cleanupAppUsageRanking(availableAppIds) {
        var currentRanking = Object.assign({}, appUsageRanking);
        var hasChanges = false;
        
        for (var appId in currentRanking) {
            if (availableAppIds.indexOf(appId) === -1) {
                delete currentRanking[appId];
                hasChanges = true;
            }
        }
        
        if (hasChanges) {
            appUsageRanking = currentRanking;
            saveSettings();
        }
    }

    FileView {
        id: settingsFile

        path: StandardPaths.writableLocation(StandardPaths.GenericStateLocation) + "/DankMaterialShell/appusage.json"
        blockLoading: true
        blockWrites: true
        watchChanges: true
        onLoaded: {
            parseSettings(settingsFile.text());
        }
        onLoadFailed: (error) => {
        }
    }
}