import { dom } from "./dom.js";
import { formatValue } from "./points.js";
import { state } from "./state.js";

export function appendLog(line) {
  const div = document.createElement("div");
  div.className = "log-line";
  div.textContent = line;
  dom.logView.appendChild(div);
  dom.logView.scrollTop = dom.logView.scrollHeight;
}

export function startLogs() {
  if (state.logSource) {
    state.logSource.close();
  }

  state.logSource = new EventSource("/api/logs/stream");
  state.logSource.addEventListener("log", (event) => {
    const data = JSON.parse(event.data);
    (data.lines || []).forEach(appendLog);
  });
}

export function startPointSocket() {
  const protocol = location.protocol === "https:" ? "wss" : "ws";
  const ws = new WebSocket(`${protocol}://${location.host}/ws/public`);
  state.pointSocket = ws;

  ws.onmessage = (event) => {
    try {
      const payload = JSON.parse(event.data);
      if (payload.type !== "PointNewValue" && payload.type !== "point_new_value") {
        return;
      }

      const data = payload.data;
      const entry = state.pointEls.get(data.point_id);
      if (!entry) {
        return;
      }

      entry.value.textContent = formatValue(data);
      entry.quality.className = `badge quality-${(data.quality || "unknown").toLowerCase()}`;
      entry.quality.textContent = (data.quality || "unknown").toUpperCase();
      entry.time.textContent = data.timestamp || "--";
    } catch {
      // ignore malformed messages
    }
  };

  ws.onclose = () => {
    window.setTimeout(startPointSocket, 2000);
  };
}