// cockpit/fester-module/targets.js

/**
 * Fester Targets Module
 * Handles nodes, edges, metrics, heatmaps, and live updates for cockpit UI.
 */

(function(global) {

    const targetsModule = {
        nodes: {},
        edges: [],
        metrics: {},
        heatmaps: {},
        callbacks: [],

        /**
         * Register a callback to receive updated DAG data
         */
        onUpdate(callback) {
            if (typeof callback === 'function') {
                this.callbacks.push(callback);
            }
        },

        /**
         * Update the internal state from WS or iframe message
         */
        update(data) {
            if (!data) return;

            if (data.nodes) {
                data.nodes.forEach(node => this.nodes[node.id] = node);
            }
            if (data.edges) {
                this.edges = data.edges;
            }
            if (data.metrics) {
                Object.assign(this.metrics, data.metrics);
            }
            if (data.heatmaps) {
                Object.assign(this.heatmaps, data.heatmaps);
            }

            this.dispatch();
        },

        /**
         * Notify all registered callbacks with the updated data
         */
        dispatch() {
            const snapshot = {
                nodes: Object.values(this.nodes),
                edges: this.edges,
                metrics: this.metrics,
                heatmaps: this.heatmaps
            };
            this.callbacks.forEach(cb => cb(snapshot));
        },

        /**
         * Clear all stored DAG state
         */
        clear() {
            this.nodes = {};
            this.edges = [];
            this.metrics = {};
            this.heatmaps = {};
            this.dispatch();
        }
    };

    // Listen for iframe messages from cockpit.html
    window.addEventListener('message', (event) => {
        const data = event.data;
        if (data && typeof data === 'object') {
            targetsModule.update(data);
        }
    });

    // Expose module globally
    global.FesterTargets = targetsModule;

})(window);