function toast(msg) {
  const el = document.getElementById("toast");
  el.textContent = msg;
  el.classList.remove("hidden");
  setTimeout(() => el.classList.add("hidden"), 2200);
}

document.querySelectorAll("[data-copy]").forEach((btn) => {
  btn.addEventListener("click", async () => {
    const text = btn.dataset.copy;
    try {
      await navigator.clipboard.writeText(text);
      toast("已复制到剪贴板");
    } catch {
      toast("复制失败，请手动选择文本");
    }
  });
});

const modal = document.getElementById("modal");
const addBtn = document.getElementById("addBtn");
const cancelBtn = document.getElementById("cancelBtn");
const confirmAddBtn = document.getElementById("confirmAddBtn");
const nodeName = document.getElementById("nodeName");

if (addBtn) {
  addBtn.addEventListener("click", () => {
    nodeName.value = "";
    modal.classList.remove("hidden");
    nodeName.focus();
  });
}

if (cancelBtn) {
  cancelBtn.addEventListener("click", () => modal.classList.add("hidden"));
}

if (confirmAddBtn) {
  confirmAddBtn.addEventListener("click", async () => {
    const name = nodeName.value.trim() || "新节点";
    confirmAddBtn.disabled = true;
    try {
      const res = await fetch("/api/nodes", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ name }),
      });
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "创建失败");
      location.reload();
    } catch (err) {
      toast(err.message);
    } finally {
      confirmAddBtn.disabled = false;
    }
  });
}

document.querySelectorAll(".delete-btn").forEach((btn) => {
  btn.addEventListener("click", async () => {
    const id = btn.dataset.id;
    if (!confirm("确定删除该节点？删除后对应链接将失效。")) return;
    btn.disabled = true;
    try {
      const res = await fetch(`/api/nodes/${id}`, { method: "DELETE" });
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "删除失败");
      location.reload();
    } catch (err) {
      toast(err.message);
      btn.disabled = false;
    }
  });
});

function setStatusBadge(el, online) {
  el.textContent = online ? "在线" : "离线";
  el.classList.toggle("online", online);
  el.classList.toggle("offline", !online);
}

function updateStats(data) {
  const summary = data.summary || {};
  const onlineEl = document.getElementById("summaryOnline");
  const upEl = document.getElementById("summaryUp");
  const downEl = document.getElementById("summaryDown");
  const statusEl = document.getElementById("summaryStatus");

  if (onlineEl) {
    onlineEl.textContent = `${summary.online || 0} / ${summary.total_nodes || 0}`;
  }
  if (upEl) upEl.textContent = summary.upload_speed_human || "0 B/s";
  if (downEl) downEl.textContent = summary.download_speed_human || "0 B/s";
  if (statusEl) {
    if (data.singbox) {
      statusEl.textContent = "正常";
      statusEl.className = "status-text ok";
    } else {
      statusEl.textContent = "不可用";
      statusEl.className = "status-text err";
    }
  }

  document.querySelectorAll(".node-card[data-id]").forEach((card) => {
    const node = (data.nodes || {})[card.dataset.id];
    if (!node) return;

    const status = card.querySelector('[data-role="status"]');
    if (status) setStatusBadge(status, node.online);

    const setText = (role, value) => {
      const el = card.querySelector(`[data-role="${role}"]`);
      if (el) el.textContent = value;
    };

    setText("connections", String(node.connections ?? 0));
    setText("speed-up", node.upload_speed_human || "0 B/s");
    setText("speed-down", node.download_speed_human || "0 B/s");
    setText("total-up", node.upload_total_human || "0 B");
    setText("total-down", node.download_total_human || "0 B");
  });
}

async function refreshStats() {
  try {
    const res = await fetch("/api/stats");
    if (!res.ok) return;
    const data = await res.json();
    updateStats(data);
  } catch {
    const statusEl = document.getElementById("summaryStatus");
    if (statusEl) {
      statusEl.textContent = "不可用";
      statusEl.className = "status-text err";
    }
  }
}

if (document.getElementById("summaryBar")) {
  refreshStats();
  setInterval(refreshStats, 5000);
}