// runner.js — 新建评估视图：列出场景、触发评估、轮询任务状态与日志。

const Runner = {
  selectedScenario: null,
  pollTimer: null,

  // 绑定运行按钮。
  init() {
    document.getElementById("run-btn").addEventListener("click", () => Runner.trigger());
    document.getElementById("view-report-btn").addEventListener("click", () => {
      if (Runner.lastRunId) {
        App.currentRunId = Runner.lastRunId;
        App.enableReportNav();
        App.switchView("report");
      }
    });
  },

  // 加载并渲染可触发的场景列表。
  async loadScenarios() {
    const list = document.getElementById("scenario-list");
    list.innerHTML = '<p class="muted">加载中…</p>';
    try {
      const data = await API.scenarios();
      const scenarios = data.scenarios || [];
      if (scenarios.length === 0) {
        list.innerHTML = '<p class="muted">未在 scenarios/ 下找到场景文件。</p>';
        return;
      }
      list.innerHTML = "";
      scenarios.forEach((sc) => list.appendChild(Runner.renderScenarioItem(sc)));
    } catch (err) {
      list.innerHTML = `<p class="muted">加载失败：${App.escape(err.message)}</p>`;
    }
  },

  // 构造单个场景条目。
  renderScenarioItem(sc) {
    const item = document.createElement("div");
    const invalid = !!sc.error;
    item.className = "scenario-item" + (invalid ? " invalid" : "");

    const modeTag = sc.mode
      ? `<span class="tag mode-${App.escape(sc.mode)}">${App.escape(sc.mode)}</span>`
      : "";
    const metricCount = (sc.metrics || []).length;

    item.innerHTML = `
      <div>
        <div class="scenario-name">${App.escape(sc.scenario_name || sc.path)}</div>
        <div class="scenario-path">${App.escape(sc.path)}</div>
        ${sc.error ? `<div class="scenario-path" style="color:#dc2626">${App.escape(sc.error)}</div>` : ""}
      </div>
      <div class="scenario-tags">
        ${modeTag}
        <span class="tag">${metricCount} 指标</span>
      </div>
    `;

    if (!invalid) {
      item.addEventListener("click", () => {
        document.querySelectorAll(".scenario-item").forEach((el) => el.classList.remove("selected"));
        item.classList.add("selected");
        Runner.selectedScenario = sc.path;
        document.getElementById("selected-scenario").textContent = sc.path;
        document.getElementById("run-btn").disabled = false;
      });
    }
    return item;
  },

  // 触发评估并开始轮询。
  async trigger() {
    if (!Runner.selectedScenario) return;
    const runBtn = document.getElementById("run-btn");
    runBtn.disabled = true;

    const panel = document.getElementById("task-panel");
    const logBox = document.getElementById("task-log");
    const statusBadge = document.getElementById("task-status");
    const reportBtn = document.getElementById("view-report-btn");
    panel.hidden = false;
    reportBtn.hidden = true;
    logBox.textContent = "";
    Runner._setStatus(statusBadge, "queued");

    try {
      const resp = await API.triggerEvaluation(Runner.selectedScenario);
      Runner.poll(resp.task_id);
    } catch (err) {
      Runner._setStatus(statusBadge, "failed");
      logBox.textContent = `触发失败：${err.message}`;
      runBtn.disabled = false;
    }
  },

  // 周期性轮询任务状态，刷新日志与徽标。
  poll(taskId) {
    const logBox = document.getElementById("task-log");
    const statusBadge = document.getElementById("task-status");
    const reportBtn = document.getElementById("view-report-btn");
    const runBtn = document.getElementById("run-btn");

    if (Runner.pollTimer) clearInterval(Runner.pollTimer);
    Runner.pollTimer = setInterval(async () => {
      try {
        const status = await API.taskStatus(taskId);
        logBox.textContent = (status.logs || []).join("\n");
        logBox.scrollTop = logBox.scrollHeight;
        Runner._setStatus(statusBadge, status.status);

        if (status.status === "completed" || status.status === "failed") {
          clearInterval(Runner.pollTimer);
          runBtn.disabled = false;
          if (status.status === "completed" && status.run_id) {
            Runner.lastRunId = status.run_id;
            reportBtn.hidden = false;
          }
        }
      } catch (err) {
        clearInterval(Runner.pollTimer);
        logBox.textContent += `\n轮询失败：${err.message}`;
        runBtn.disabled = false;
      }
    }, 1200);
  },

  // 更新状态徽标的文本与配色类。
  _setStatus(badge, status) {
    badge.textContent = status;
    badge.className = "badge " + status;
  },
};