'use strict';
const { getClient, getPrefix, publish } = require('./client');
const { allOutputs } = require('../registry');
const { sendCommand } = require('../control');

function subscribeAll() {
  const client = getClient();
  if (!client) return;
  const prefix = getPrefix();

  for (const out of allOutputs()) {
    const topic = `${prefix}/${out.moduleSlug}/output/${out.index}/set`;
    client.subscribe(topic);
  }

  client.on('message', async (topic, buf) => {
    const prefix_ = `${prefix}/`;
    if (!topic.startsWith(prefix_)) return;

    // Match: {prefix}/{slug}/output/{index}/set
    const parts = topic.slice(prefix_.length).split('/');
    if (parts.length !== 4 || parts[1] !== 'output' || parts[3] !== 'set') return;

    const [slug, , indexStr] = parts;
    const outputIndex = parseInt(indexStr, 10);

    let cmd;
    try {
      cmd = JSON.parse(buf.toString());
    } catch {
      console.warn(`[commands] Invalid JSON on ${topic}`);
      return;
    }

    // Find module by slug
    const output = allOutputs().find(o => o.moduleSlug === slug && o.index === outputIndex);
    if (!output) {
      console.warn(`[commands] No output found for ${slug}/output/${outputIndex}`);
      return;
    }

    try {
      await sendCommand(output.moduleId, outputIndex, cmd);
      // Reflect running state optimistically
      const stateValue = (cmd.action === 'run' || cmd.action === 'boost') ? 1 : 0;
      publish(`${slug}/output/${outputIndex}/state`, { value: stateValue, ts: new Date().toISOString() });
      console.log(`[commands] ${slug}/output/${outputIndex} → ${cmd.action}`);
    } catch (e) {
      console.error(`[commands] Command failed for ${slug}/output/${outputIndex}:`, e.message);
    }
  });

  console.log(`[commands] Subscribed to ${allOutputs().length} output set topics`);
}

module.exports = { subscribeAll };