function skuDlg(cur){
  cur=cur||{};
  const types=['subs','inapp','one_time'];
  return modal({
    title: cur.id ? '编辑 SKU' : '添加 SKU',
    okText: '保存',
    fields:[
      {label:'名称', value:cur.title||''},
      {label:'包名', value:cur.package||'', placeholder:'com.example.app'},
      {label:'SKU', value:cur.sku||''},
      {label:'类型 subs / inapp / one_time', value:cur.product_type||'subs', placeholder:types.join(' / ')},
      {label:'默认 offer token（可选）', value:cur.offer_token||''},
      {label:'备注', value:cur.note||''}
    ]
  });
}
async function addSkuDlg(){
  const v=await skuDlg(null);
  if(!v) return;
  const body={title:String(v[0]||'').trim(), package:String(v[1]||'').trim(), sku:String(v[2]||'').trim(), product_type:String(v[3]||'subs').trim()||'subs', offer_token:String(v[4]||'').trim(), note:String(v[5]||'').trim()};
  if(!body.package || !body.sku) return fail('无法添加','包名和 SKU 必填');
  const j=await api('/api/skus',{method:'POST',body:JSON.stringify(body)});
  if(j.error) return fail('无法添加', j.error);
  notice('已添加', body.sku);
  await loadAll(); render(false);
}
async function editSku(id){
  const cur=(cache.skus||[]).find(s=>Number(s.id)===Number(id));
  if(!cur) return fail('无法编辑','找不到 SKU');
  const v=await skuDlg(cur);
  if(!v) return;
  const body={title:String(v[0]||'').trim(), package:String(v[1]||'').trim(), sku:String(v[2]||'').trim(), product_type:String(v[3]||'subs').trim()||'subs', offer_token:String(v[4]||'').trim(), note:String(v[5]||'').trim()};
  if(!body.package || !body.sku) return fail('无法保存','包名和 SKU 必填');
  const j=await api('/api/skus/'+id,{method:'PUT',body:JSON.stringify(body)});
  if(j.error) return fail('无法保存', j.error);
  notice('已保存', body.sku);
  await loadAll(); render(false);
}
async function delSku(id){
  const cur=(cache.skus||[]).find(s=>Number(s.id)===Number(id));
  const ok=await modal({title:'删除 SKU', message:'删除 '+(cur?(cur.title||cur.sku):('#'+id))+'？报价也会一起去掉。', okText:'删除', cancelText:'取消'});
  if(!ok) return;
  const j=await api('/api/skus/'+id,{method:'DELETE'});
  if(j.error) return fail('无法删除', j.error);
  notice('已删除', cur?(cur.sku||''):('#'+id));
  await loadAll(); render(false);
}