import { apiFetch } from "./api.js";
import { dom } from "./dom.js";
import { loadPoints, loadTree, renderSelectedNodes } from "./points.js";
import { state } from "./state.js";

export function renderSources() {
  dom.sourceList.innerHTML = "";

  state.sources.forEach((source) => {
    const item = document.createElement("div");
    item.className = `list-item ${state.selectedSourceId === source.id ? "selected" : ""}`;
    item.innerHTML = `
      <div class="row">
        <strong>${source.name}</strong>
        <span class="badge ${source.is_connected ? "" : "offline"}">${source.is_connected ? "在线" : "离线"}</span>
      </div>
      <div class="muted">${source.endpoint}</div>
    `;

    item.addEventListener("click", () => {
      selectSource(source.id).catch((error) => {
        dom.statusText.textContent = error.message;
      });
    });

    const actions = document.createElement("div");
    actions.className = "row";

    const selectBtn = document.createElement("button");
    selectBtn.textContent = "选入点位";
    selectBtn.addEventListener("click", (event) => {
      event.stopPropagation();
      selectSource(source.id)
        .then(() => {
          dom.pointModal.classList.remove("hidden");
          return loadTree();
        })
        .catch((error) => {
          dom.statusText.textContent = error.message;
        });
    });

    const editBtn = document.createElement("button");
    editBtn.className = "secondary";
    editBtn.textContent = "编辑";
    editBtn.addEventListener("click", (event) => {
      event.stopPropagation();
      dom.sourceId.value = source.id;
      dom.sourceName.value = source.name || "";
      dom.sourceEndpoint.value = source.endpoint || "";
      dom.sourceEnabled.checked = !!source.enabled;
      dom.sourceModal.classList.remove("hidden");
    });

    const reconnectBtn = document.createElement("button");
    reconnectBtn.className = "secondary";
    reconnectBtn.textContent = "重连";
    reconnectBtn.addEventListener("click", (event) => {
      event.stopPropagation();
      reconnectSource(source.id, source.name).catch((error) => {
        dom.statusText.textContent = error.message;
      });
    });

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

    actions.append(selectBtn, editBtn, reconnectBtn, deleteBtn);
    item.appendChild(actions);
    dom.sourceList.appendChild(item);
  });
}

export async function loadSources() {
  state.sources = await apiFetch("/api/source");
  renderSources();
}

export async function selectSource(sourceId) {
  state.selectedSourceId = sourceId;
  state.selectedNodeIds.clear();
  state.pointsPage = 1;
  renderSources();
  renderSelectedNodes();
  await loadPoints();
  await loadTree();
}

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

  const payload = {
    name: dom.sourceName.value.trim(),
    endpoint: dom.sourceEndpoint.value.trim(),
    enabled: dom.sourceEnabled.checked,
  };

  const id = dom.sourceId.value;
  await apiFetch(id ? `/api/source/${id}` : "/api/source", {
    method: id ? "PUT" : "POST",
    body: JSON.stringify(payload),
  });

  dom.sourceModal.classList.add("hidden");
  dom.sourceForm.reset();
  await loadSources();
}

export async function deleteSource(sourceId) {
  if (!window.confirm("确认删除该 Source？")) {
    return;
  }

  await apiFetch(`/api/source/${sourceId}`, { method: "DELETE" });
  await loadSources();
}

export async function reconnectSource(sourceId, name) {
  dom.statusText.textContent = `正在重连 ${name || "Source"}...`;
  await apiFetch(`/api/source/${sourceId}/reconnect`, { method: "POST" });
  await loadSources();
  dom.statusText.textContent = "Ready";
}

export async function browseNodes() {
  if (!state.selectedSourceId) {
    throw new Error("请先选择数据源");
  }

  await apiFetch(`/api/source/${state.selectedSourceId}/browse`, { method: "POST" });
  await loadTree();
}