"use strict";

const systemPromptInput = document.getElementById("systemPromptInput");
const systemPromptPath = document.getElementById("systemPromptPath");
const saveSystemPromptBtn = document.getElementById("saveSystemPromptBtn");
const refreshSettingsBtn = document.getElementById("refreshSettingsBtn");
const settingsStatus = document.getElementById("settingsStatus");
const skillsList = document.getElementById("skillsList");
const skillsCount = document.getElementById("skillsCount");
const extensionsList = document.getElementById("extensionsList");
const extensionsMeta = document.getElementById("extensionsMeta");
const settingsNavBtns = document.querySelectorAll(".settings-nav-btn");
const settingsPanes = document.querySelectorAll(".settings-pane");

const SETTINGS_PANE_KEY = "sproutclaw-settings-pane";

function escHtml(s) {
  const div = document.createElement("div");
  div.textContent = s;
  return div.innerHTML;
}

function setSettingsStatus(text, kind = "") {
  if (!settingsStatus) return;
  settingsStatus.textContent = text || "";
  settingsStatus.className = `settings-status${kind ? ` ${kind}` : ""}`;
}

function showSettingsPane(paneId) {
  const id = ["prompt", "skills", "extensions"].includes(paneId) ? paneId : "prompt";
  settingsNavBtns.forEach((btn) => {
    const active = btn.dataset.pane === id;
    btn.classList.toggle("is-active", active);
    btn.setAttribute("aria-selected", active ? "true" : "false");
  });
  settingsPanes.forEach((pane) => {
    const active = pane.id === `pane-${id}`;
    pane.classList.toggle("is-active", active);
    pane.toggleAttribute("hidden", !active);
  });
  try {
    sessionStorage.setItem(SETTINGS_PANE_KEY, id);
  } catch {
    /* ignore */
  }
}

function initSettingsNav() {
  settingsNavBtns.forEach((btn) => {
    btn.addEventListener("click", () => showSettingsPane(btn.dataset.pane));
  });
  let initial = "prompt";
  try {
    const saved = sessionStorage.getItem(SETTINGS_PANE_KEY);
    if (["prompt", "skills", "extensions"].includes(saved)) initial = saved;
  } catch {
    /* ignore */
  }
  showSettingsPane(initial);
}

async function loadSettings() {
  if (skillsList) skillsList.innerHTML = '<div class="settings-empty">加载中...</div>';
  if (extensionsList) extensionsList.innerHTML = '<div class="settings-empty">加载中...</div>';
  setSettingsStatus("");
  try {
    const res = await fetch("/api/settings");
    const data = await res.json().catch(() => ({}));
    if (!res.ok || data.error) throw new Error(data.error || res.statusText);
    if (systemPromptInput) systemPromptInput.value = data.systemPrompt || "";
    if (systemPromptPath) systemPromptPath.textContent = data.systemPromptPath || "";
    renderSkills(data.skills || []);
    renderExtensions(data.extensions || [], data.extensionsPath || "");
  } catch (err) {
    if (skillsList) skillsList.innerHTML = `<div class="settings-empty">加载失败: ${escHtml(err.message)}</div>`;
    if (extensionsList) extensionsList.innerHTML = `<div class="settings-empty">加载失败: ${escHtml(err.message)}</div>`;
    setSettingsStatus(`加载设置失败: ${err.message}`, "error");
  }
}

function renderSkills(skills) {
  if (!skillsList) return;
  if (skillsCount) skillsCount.textContent = `${skills.length} 个已加载`;
  if (!skills.length) {
    skillsList.innerHTML = '<div class="settings-empty">暂无已加载 skills</div>';
    return;
  }

  skillsList.innerHTML = skills.map((skill) => {
    const meta = [skill.scope, skill.source].filter(Boolean).join(" · ");
    const path = skill.path || "";
    return `<div class="skill-item">
      <div class="skill-title-row">
        <div class="skill-name">${escHtml(skill.name || skill.command || "未命名")}</div>
        ${meta ? `<div class="skill-meta">${escHtml(meta)}</div>` : ""}
      </div>
      ${skill.description ? `<div class="skill-desc">${escHtml(skill.description)}</div>` : ""}
      ${path ? `<div class="skill-path">${escHtml(path)}</div>` : ""}
    </div>`;
  }).join("");
}

function renderExtensions(extensions, extensionsPath) {
  if (!extensionsList) return;
  if (extensionsMeta) {
    extensionsMeta.textContent = extensionsPath
      ? `${extensions.length} 个已加载 · ${extensionsPath}`
      : `${extensions.length} 个已加载`;
  }
  if (!extensions.length) {
    extensionsList.innerHTML = '<div class="settings-empty">暂无已加载插件扩展</div>';
    return;
  }

  extensionsList.innerHTML = extensions.map((extension) => {
    const meta = extension.kind || [extension.scope, extension.source].filter(Boolean).join(" · ");
    const counts = [
      [`命令`, extension.commands?.length || 0],
      [`工具`, extension.tools?.length || 0],
      [`事件`, extension.handlers?.length || 0],
      [`Flags`, extension.flags?.length || 0],
      [`快捷键`, extension.shortcuts?.length || 0],
    ].filter(([, count]) => count > 0);
    const hasDetails = ["commands", "tools", "handlers", "flags", "shortcuts"].some((key) => extension[key]?.length);
    return `<div class="extension-item">
      <div class="extension-title-row">
        <div class="extension-name">${escHtml(extension.name || extension.path || "未命名")}</div>
        ${meta ? `<div class="extension-meta">${escHtml(meta)}</div>` : ""}
      </div>
      ${counts.length ? `<div class="extension-counts">${counts.map(([label, count]) => `<span>${escHtml(label)} ${count}</span>`).join("")}</div>` : ""}
      ${hasDetails ? `<details class="extension-details">
        <summary>查看注册项</summary>
        ${renderNameList("命令", extension.commands)}
        ${renderNameList("工具", extension.tools)}
        ${renderNameList("事件", extension.handlers)}
        ${renderNameList("Flags", extension.flags)}
        ${renderNameList("快捷键", extension.shortcuts)}
      </details>` : ""}
      ${extension.location ? `<div class="extension-path">${escHtml(extension.location)}</div>` : ""}
    </div>`;
  }).join("");
}

function renderNameList(label, items) {
  if (!Array.isArray(items) || !items.length) return "";
  return `<div class="extension-name-list">
    <span>${escHtml(label)}</span>
    <div>${items.map((item) => `<code>${escHtml(item)}</code>`).join("")}</div>
  </div>`;
}

async function saveSystemPrompt() {
  if (!systemPromptInput || !saveSystemPromptBtn) return;
  saveSystemPromptBtn.disabled = true;
  setSettingsStatus("保存中...");
  try {
    const res = await fetch("/api/settings/system-prompt", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ systemPrompt: systemPromptInput.value }),
    });
    const data = await res.json().catch(() => ({}));
    if (!res.ok || data.error) throw new Error(data.error || res.statusText);
    if (systemPromptPath && data.systemPromptPath) systemPromptPath.textContent = data.systemPromptPath;
    setSettingsStatus("已保存，Agent 已重新加载", "ok");
  } catch (err) {
    setSettingsStatus(`保存失败: ${err.message}`, "error");
  } finally {
    saveSystemPromptBtn.disabled = false;
  }
}

initSettingsNav();
saveSystemPromptBtn?.addEventListener("click", saveSystemPrompt);
refreshSettingsBtn?.addEventListener("click", loadSettings);
document.getElementById("refreshExtensionsBtn")?.addEventListener("click", loadSettings);
loadSettings();