// Unreal Engine Tools — official plugin.
// The core app keeps the build engine (UnrealBuildTool / MSBuild), the build
// overlay and the log reader; this plugin is just the Unreal-facing surface:
// a "Build Solution" action and a live Unreal-log view. Reached through the
// permission-gated `host.ue` bridge.

export function activate(host) {
  const ue = host.ue;
  if (!ue) { host.log("no ue bridge — plugin.json needs the \"ue\" permission"); return; }

  // Build the game target (UnrealBuildTool for the game module, MSBuild for plain C++).
  host.ui.addMenuItem("🔨 Build Solution (Unreal)", () => {
    if (!ue.hasProject()) { host.flash("No Unreal project in the current working folder.", true); return; }
    ue.build(); // triggers the core build flow + overlay
  });

  // Launch the Unreal editor by opening the detected .uproject.
  host.ui.addMenuItem("🚀 Launch Unreal Engine", () => {
    if (!ue.hasProject()) { host.flash("No Unreal project in the current working folder.", true); return; }
    ue.launch();
  });

  // Live Unreal editor log (tails Saved/Logs). Opens from the Actions menu.
  host.ui.addView({
    id: "unreal-log",
    title: "Unreal Log",
    render: (el) => {
      el.style.cssText = "display:flex;flex-direction:column;height:100%;min-height:340px";
      const pre = document.createElement("pre");
      pre.style.cssText =
        "flex:1;margin:0;overflow:auto;white-space:pre-wrap;word-break:break-word;" +
        "font:11.5px/1.6 var(--mono,ui-monospace,monospace);color:var(--muted,#9a9aa8)";
      el.appendChild(pre);
      let alive = true;
      async function tick() {
        if (!alive) return;
        try {
          if (!ue.hasProject()) { pre.textContent = "No Unreal project in the current working folder."; return; }
          const atBottom = pre.scrollTop + pre.clientHeight >= pre.scrollHeight - 30;
          const txt = await ue.readLog(200000);
          pre.textContent = txt || "No Unreal log yet. It appears when the editor writes to Saved/Logs (i.e. while Unreal is running).";
          if (atBottom) pre.scrollTop = pre.scrollHeight;
        } catch (e) { pre.textContent = String(e); }
      }
      tick();
      const id = setInterval(tick, 1500);
      return () => { alive = false; clearInterval(id); };
    },
  });

  host.log("Unreal Engine Tools activated");
}