// admin.js — 账号管理（仅 admin 可见）

window.openAdminUsers = async () => {
  const overlay = document.createElement("div");
  overlay.id = "adminOverlay";
  overlay.className = "fixed inset-0 bg-black/40 z-[9998] flex items-center justify-center p-4";
  overlay.innerHTML = `
    <div class="bg-white rounded-xl shadow-2xl w-full max-w-3xl max-h-[85vh] flex flex-col">
      <div class="flex items-center justify-between px-6 py-4 border-b border-slate-200">
        <h2 class="text-lg font-semibold text-slate-800">账号管理</h2>
        <div class="flex items-center gap-2">
          <button class="btn btn-primary btn-sm" onclick="openUserForm()"><i data-lucide="plus" style="width:14px;height:14px"></i>新增账号</button>
          <button class="text-slate-400 hover:text-slate-700" onclick="closeAdminUsers()"><i data-lucide="x"></i></button>
        </div>
      </div>
      <div class="overflow-y-auto p-6" id="adminUserList"></div>
    </div>`;
  overlay.addEventListener("click", (e) => { if (e.target === overlay) closeAdminUsers(); });
  document.body.appendChild(overlay);
  if (window.lucide) lucide.createIcons();
  await loadUserList();
};

window.closeAdminUsers = () => {
  const el = document.getElementById("adminOverlay");
  if (el) el.remove();
};

async function loadUserList() {
  const list = document.getElementById("adminUserList");
  if (!list) return;
  list.innerHTML = `<div class="text-center text-slate-400 py-8">加载中...</div>`;
  try {
    const users = await api("/api/users");
    const tenants = await api("/api/tenants");
    list.innerHTML = `
      <table class="w-full text-sm">
        <thead>
          <tr class="border-b border-slate-200 text-slate-500 text-xs">
            <th class="text-left py-2 px-2">用户名</th>
            <th class="text-left py-2 px-2">显示名</th>
            <th class="text-left py-2 px-2">角色</th>
            <th class="text-left py-2 px-2">工作台</th>
            <th class="text-right py-2 px-2">操作</th>
          </tr>
        </thead>
        <tbody>
          ${users.map(u => `
            <tr class="border-b border-slate-100 hover:bg-slate-50">
              <td class="py-3 px-2 font-medium text-slate-800">${esc(u.username)}</td>
              <td class="py-3 px-2 text-slate-700">${esc(u.display_name)}</td>
              <td class="py-3 px-2">
                <span class="inline-flex items-center px-2 py-0.5 rounded text-xs font-medium ${u.role === 'admin' ? 'bg-blue-100 text-blue-700' : 'bg-slate-100 text-slate-600'}">${u.role === 'admin' ? '管理员' : 'OPC负责人'}</span>
              </td>
              <td class="py-3 px-2 text-slate-600 text-xs">${(u.tenants || []).map(t => `<span class="inline-block bg-slate-100 rounded px-1.5 py-0.5 mr-1 mb-1">${esc(t)}</span>`).join('') || '<span class="text-slate-400">—</span>'}</td>
              <td class="py-3 px-2 text-right">
                <button class="btn btn-ghost btn-sm" onclick="openUserForm(${u.id})"><i data-lucide="edit-2" style="width:14px;height:14px"></i>编辑</button>
                <button class="btn btn-ghost btn-sm text-red-600 hover:bg-red-50" onclick="deleteUser(${u.id}, '${esc(u.username)}')"><i data-lucide="trash-2" style="width:14px;height:14px"></i>删除</button>
              </td>
            </tr>
          `).join('')}
        </tbody>
      </table>`;
    if (window.lucide) lucide.createIcons();
  } catch (e) {
    list.innerHTML = `<div class="text-center text-red-600 py-8">加载失败：${esc(e.message)}</div>`;
  }
}

window.openUserForm = async (uid) => {
  let user = null;
  let userTenants = [];
  if (uid) {
    try {
      const users = await api("/api/users");
      user = users.find(u => u.id === uid);
      userTenants = user?.tenants || [];
    } catch (e) { toast("加载用户失败", "error"); return; }
  }
  const tenants = await api("/api/tenants");

  const modal = document.createElement("div");
  modal.id = "userFormModal";
  modal.className = "fixed inset-0 bg-black/40 z-[9999] flex items-center justify-center p-4";
  modal.innerHTML = `
    <div class="bg-white rounded-xl shadow-2xl w-full max-w-md">
      <div class="flex items-center justify-between px-6 py-4 border-b border-slate-200">
        <h3 class="text-base font-semibold text-slate-800">${user ? '编辑账号' : '新增账号'}</h3>
        <button class="text-slate-400 hover:text-slate-700" onclick="document.getElementById('userFormModal').remove()"><i data-lucide="x"></i></button>
      </div>
      <form class="p-6 space-y-4" onsubmit="submitUserForm(event, ${uid || 0})">
        <div>
          <label class="block text-xs font-medium text-slate-600 mb-1">用户名 ${user ? '<span class="text-slate-400">(不可修改)</span>' : '<span class="text-red-500">*</span>'}</label>
          <input name="username" class="form-ctrl w-full" value="${user ? esc(user.username) : ''}" ${user ? 'disabled' : 'required'} placeholder="登录用户名">
        </div>
        <div>
          <label class="block text-xs font-medium text-slate-600 mb-1">显示名 <span class="text-red-500">*</span></label>
          <input name="display_name" class="form-ctrl w-full" value="${user ? esc(user.display_name) : ''}" required placeholder="如：科普负责人">
        </div>
        <div>
          <label class="block text-xs font-medium text-slate-600 mb-1">密码 ${user ? '<span class="text-slate-400">(留空不修改)</span>' : '<span class="text-red-500">*</span>'}</label>
          <input name="password" type="password" class="form-ctrl w-full" ${user ? '' : 'required'} placeholder="${user ? '留空保持原密码' : '登录密码'}">
        </div>
        <div>
          <label class="block text-xs font-medium text-slate-600 mb-1">角色</label>
          <select name="role" class="form-ctrl w-full">
            <option value="opc_owner" ${user?.role === 'opc_owner' ? 'selected' : ''}>OPC负责人（仅看分配工作台）</option>
            <option value="admin" ${user?.role === 'admin' ? 'selected' : ''}>管理员（看所有工作台）</option>
          </select>
        </div>
        <div>
          <label class="block text-xs font-medium text-slate-600 mb-1">工作台权限 <span class="text-slate-400">(OPC负责人生效)</span></label>
          <div class="space-y-1.5">
            ${tenants.map(t => `
              <label class="flex items-center gap-2 cursor-pointer">
                <input type="checkbox" name="tenants" value="${esc(t)}" ${userTenants.includes(t) ? 'checked' : ''} class="rounded">
                <span class="text-sm text-slate-700">${esc(t)}</span>
              </label>
            `).join('')}
          </div>
        </div>
        <div class="flex justify-end gap-2 pt-2">
          <button type="button" class="btn btn-ghost btn-sm" onclick="document.getElementById('userFormModal').remove()">取消</button>
          <button type="submit" class="btn btn-primary btn-sm">保存</button>
        </div>
      </form>
    </div>`;
  modal.addEventListener("click", (e) => { if (e.target === modal) modal.remove(); });
  document.body.appendChild(modal);
  if (window.lucide) lucide.createIcons();
};

window.submitUserForm = async (event, uid) => {
  event.preventDefault();
  const form = event.target;
  const fd = new FormData(form);
  const payload = {
    username: fd.get("username"),
    display_name: fd.get("display_name"),
    password: fd.get("password"),
    role: fd.get("role"),
    tenants: fd.getAll("tenants"),
  };
  try {
    if (uid) {
      await api(`/api/users/${uid}`, { method: "PUT", body: JSON.stringify(payload) });
      toast("已更新", "success");
    } else {
      await api("/api/users", { method: "POST", body: JSON.stringify(payload) });
      toast("已新增", "success");
    }
    document.getElementById("userFormModal").remove();
    await loadUserList();
  } catch (e) {
    toast("保存失败：" + e.message, "error");
  }
};

window.deleteUser = async (uid, username) => {
  if (!confirm(`确认删除账号「${username}」？此操作不可撤销。`)) return;
  try {
    await api(`/api/users/${uid}`, { method: "DELETE" });
    toast("已删除", "success");
    await loadUserList();
  } catch (e) {
    toast("删除失败：" + e.message, "error");
  }
};