// runner.js — 新建评估视图：列出场景、LLM角色配置、权重配置、触发评估、轮询任务状态。

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

  init() {
    document.getElementById("run-btn").addEventListener("click", () => Runner.trigger());
    document.getElementById("view-report-btn").addEventListener("click", () => {
      if (Runner.lastRunId) {
        App.enableReportNav();
        App.navigate("report", Runner.lastRunId);
      }
    });
    document.getElementById("add-doc-weight-btn").addEventListener("click", () => Runner._addDocWeightRow());
  },

  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>`;
    }
    Runner._populateProfileSelects();
  },

  async _populateProfileSelects() {
    const cached = Profiles.getAll();
    const profiles = cached.length > 0
      ? cached
      : (await API.profiles().catch(() => ({ profiles: [] }))).profiles;
    ["role-judge", "role-answer", "role-dataset"].forEach(id => {
      const sel = document.getElementById(id);
      sel.innerHTML = '<option value="">— 使用场景原始配置 —</option>';
      profiles.forEach(p => {
        const opt = document.createElement("option");
        opt.value = p.profile_id;
        opt.textContent = `${p.name}  (${p.model})`;
        sel.appendChild(opt);
      });
    });
  },

  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;
        Runner.selectedScenarioInfo = sc;
        document.getElementById("selected-scenario").textContent = sc.path;
        document.getElementById("run-btn").disabled = false;
        document.getElementById("llm-assignment-panel").hidden = false;
        Runner._renderWeightPanel(sc);
        document.getElementById("weight-config-panel").hidden = false;
      });
    }
    return item;
  },

  // 根据选中场景渲染指标权重行（动态生成，按场景 metrics 列表）
  _renderWeightPanel(sc) {
    const metricRows = document.getElementById("metric-weight-rows");
    metricRows.innerHTML = "";
    const metrics = sc.metrics || [];
    const existingWeights = sc.metric_weights || {};
    metrics.forEach(metric => {
      const row = document.createElement("div");
      row.className = "weight-row";
      const currentVal = existingWeights[metric] != null ? existingWeights[metric] : 1.0;
      row.innerHTML = `
        <span class="weight-row-label">${App.escape(metric)}</span>
        <input class="weight-row-input" type="number" min="0" step="0.1"
               data-metric="${App.escape(metric)}" value="${currentVal}" />
      `;
      metricRows.appendChild(row);
    });

    // 填充已有文档权重
    const docRows = document.getElementById("doc-weight-rows");
    docRows.innerHTML = "";
    const existingDocWeights = sc.doc_weights || {};
    Object.entries(existingDocWeights).forEach(([docName, w]) => {
      Runner._addDocWeightRow(docName, w);
    });
  },

  // 添加一行文档权重输入
  _addDocWeightRow(docName, weight) {
    const name = docName !== undefined ? docName : "";
    const w = weight !== undefined ? weight : 1.0;
    const container = document.getElementById("doc-weight-rows");
    const row = document.createElement("div");
    row.className = "weight-row";
    row.innerHTML = `
      <input class="doc-weight-name" type="text" placeholder="PDF 文件名（如 322_双源CT.pdf）" value="${App.escape(String(name))}" />
      <input class="weight-row-input" type="number" min="0" step="0.1" value="${w}" />
      <button class="weight-row-remove" title="删除">✕</button>
    `;
    row.querySelector(".weight-row-remove").addEventListener("click", () => row.remove());
    container.appendChild(row);
  },

  // 收集权重面板当前值；全等权时返回 null（不发送）
  _collectWeights() {
    const metricWeights = {};
    document.querySelectorAll("#metric-weight-rows .weight-row-input").forEach(input => {
      const metric = input.dataset.metric;
      const val = parseFloat(input.value);
      if (metric && !isNaN(val)) metricWeights[metric] = val;
    });

    const docWeights = {};
    document.querySelectorAll("#doc-weight-rows .weight-row").forEach(row => {
      const nameInput = row.querySelector(".doc-weight-name");
      const valInput = row.querySelector(".weight-row-input");
      if (!nameInput || !valInput) return;
      const name = nameInput.value.trim();
      const val = parseFloat(valInput.value);
      if (name && !isNaN(val)) docWeights[name] = val;
    });

    const allMetricDefault = Object.values(metricWeights).every(v => Math.abs(v - 1.0) < 1e-9);
    const noDocWeights = Object.keys(docWeights).length === 0;
    if (allMetricDefault && noDocWeights) return { metricWeights: null, docWeights: null };
    return { metricWeights, docWeights };
  },

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

  async _applyProfilesIfNeeded(logBox) {
    const judgeId = document.getElementById("role-judge").value;
    const answerId = document.getElementById("role-answer").value;
    const datasetId = document.getElementById("role-dataset").value;
    const { metricWeights, docWeights } = Runner._collectWeights();

    if (!judgeId && !answerId && !datasetId && !metricWeights && !docWeights) return;

    logBox.textContent = "正在将 LLM 配置和权重写入场景文件…\n";
    const body = {
      scenario_path: Runner.selectedScenario,
      judge_profile_id: judgeId || null,
      answer_profile_id: answerId || null,
      dataset_profile_id: datasetId || null,
      metric_weights: metricWeights,
      doc_weights: docWeights,
    };
    const result = await API.applyProfiles(body);
    const fields = (result.patched_fields || []).join(", ");
    logBox.textContent += fields
      ? `✓ 已更新字段：${fields}\n`
      : "（未找到可更新的字段，继续运行）\n";
  },

  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;
            sessionStorage.setItem("rag_run_id", status.run_id);
            reportBtn.hidden = false;
          }
        }
      } catch (err) {
        clearInterval(Runner.pollTimer);
        logBox.textContent += `\n轮询失败：${err.message}`;
        runBtn.disabled = false;
      }
    }, 1200);
  },

  _setStatus(badge, status) {
    badge.textContent = status;
    badge.className = "badge " + status;
  },
};