import { apiFetch } from "./api.js";
import { openChart } from "./chart.js";
import { dom } from "./dom.js";
import { loadEquipments, renderEquipmentOptions } from "./equipment.js";
import { state } from "./state.js";

export function formatValue(monitor) {
  if (!monitor) {
    return "--";
  }
  if (monitor.value_text) {
    return monitor.value_text;
  }
  if (monitor.value === null || monitor.value === undefined) {
    return "--";
  }
  return typeof monitor.value === "string" ? monitor.value : JSON.stringify(monitor.value);
}

export function renderSelectedNodes() {
  dom.selectedCount.textContent = `已选中 ${state.selectedNodeIds.size} 个节点`;
}

function renderNode(node) {
  const details = document.createElement("details");
  const summary = document.createElement("summary");

  if (node.children?.length) {
    summary.classList.add("has-children");
  }

  const checkbox = document.createElement("input");
  checkbox.type = "checkbox";
  checkbox.checked = state.selectedNodeIds.has(node.id);
  checkbox.addEventListener("change", () => {
    if (checkbox.checked) {
      state.selectedNodeIds.add(node.id);
    } else {
      state.selectedNodeIds.delete(node.id);
    }
    renderSelectedNodes();
  });

  const label = document.createElement("span");
  label.className = "node-label";
  label.textContent = `${node.display_name || node.browse_name} (${node.node_class})`;

  summary.append(checkbox, label);
  details.appendChild(summary);

  (node.children || []).forEach((child) => {
    details.appendChild(renderNode(child));
  });

  return details;
}

export async function loadTree() {
  if (!state.selectedSourceId) {
    dom.nodeTree.innerHTML = '<div class="muted">请选择数据源</div>';
    return;
  }

  const data = await apiFetch(`/api/source/${state.selectedSourceId}/node-tree`);
  dom.nodeTree.innerHTML = "";
  (data || []).forEach((node) => dom.nodeTree.appendChild(renderNode(node)));
}

export async function createPoints() {
  if (!state.selectedNodeIds.size) {
    return;
  }

  await apiFetch("/api/point/batch", {
    method: "POST",
    body: JSON.stringify({ node_ids: Array.from(state.selectedNodeIds) }),
  });

  state.selectedNodeIds.clear();
  renderSelectedNodes();
  dom.pointModal.classList.add("hidden");
  await loadPoints();
}

export async function loadPoints() {
  const sourceQuery = state.selectedSourceId ? `&source_id=${state.selectedSourceId}` : "";
  const data = await apiFetch(
    `/api/point?page=${state.pointsPage}&page_size=${state.pointsPageSize}${sourceQuery}`,
  );

  const items = data.data || [];
  state.pointsTotal = typeof data.total === "number" ? data.total : items.length;
  state.pointEls.clear();
  dom.pointList.innerHTML = "";

  if (!items.length) {
    dom.pointList.innerHTML = '<tr><td colspan="6" class="empty-state">暂无点位</td></tr>';
    dom.pointsPageInfo.textContent = `${state.pointsPage} / 1`;
    return;
  }

  items.forEach((item) => {
    const point = item.point || item;
    const monitor = item.point_monitor || null;
    const equipment = point.equipment_id ? state.equipmentMap.get(point.equipment_id) : null;
    const tr = document.createElement("tr");

    tr.addEventListener("click", () => {
      openChart(point.id, point.name).catch((error) => {
        dom.statusText.textContent = error.message;
      });
    });

    tr.innerHTML = `
      <td>
        <div class="point-name">${point.name}</div>
        <div class="point-id">${point.node_id}</div>
      </td>
      <td><span class="point-value">${formatValue(monitor)}</span></td>
      <td><span class="badge quality-${(monitor?.quality || "unknown").toLowerCase()}">${(monitor?.quality || "unknown").toUpperCase()}</span></td>
      <td>
        <div class="point-meta">
          <div>${equipment ? equipment.name : '<span class="muted">未绑定</span>'}</div>
          <div class="point-role">${point.signal_role || "--"}</div>
        </div>
      </td>
      <td><span class="muted">${monitor?.timestamp || "--"}</span></td>
      <td></td>
    `;

    const actionCell = tr.lastElementChild;

    const bindBtn = document.createElement("button");
    bindBtn.className = "secondary";
    bindBtn.textContent = "绑定";
    bindBtn.addEventListener("click", (event) => {
      event.stopPropagation();
      openPointBinding(point);
    });

    const deleteBtn = document.createElement("button");
    deleteBtn.className = "danger";
    deleteBtn.textContent = "删除";
    deleteBtn.addEventListener("click", (event) => {
      event.stopPropagation();
      deletePoint(point.id).catch((error) => {
        dom.statusText.textContent = error.message;
      });
    });

    actionCell.append(bindBtn, deleteBtn);
    dom.pointList.appendChild(tr);

    state.pointEls.set(point.id, {
      row: tr,
      value: tr.querySelector(".point-value"),
      quality: tr.querySelector(".badge"),
      time: tr.querySelector("td:nth-child(5) .muted"),
    });
  });

  const totalPages = Math.max(1, Math.ceil(state.pointsTotal / state.pointsPageSize));
  dom.pointsPageInfo.textContent = `${state.pointsPage} / ${totalPages}`;
}

export function openPointBinding(point) {
  dom.bindingPointId.value = point.id;
  dom.bindingPointName.value = point.name || "";
  dom.bindingSignalRole.value = point.signal_role || "";
  renderEquipmentOptions(point.equipment_id || "");
  dom.pointBindingModal.classList.remove("hidden");
}

export async function savePointBinding(event) {
  event.preventDefault();

  await apiFetch(`/api/point/${dom.bindingPointId.value}`, {
    method: "PUT",
    body: JSON.stringify({
      equipment_id: dom.bindingEquipmentId.value || null,
      signal_role: dom.bindingSignalRole.value.trim() || null,
    }),
  });

  dom.pointBindingModal.classList.add("hidden");
  await loadEquipments();
  await loadPoints();
}

export async function deletePoint(pointId) {
  if (!window.confirm("确认删除该点位？")) {
    return;
  }

  await apiFetch(`/api/point/${pointId}`, { method: "DELETE" });
  await loadPoints();
}