// Extend the existing email settings page using its authenticated admin API and styles.
const fieldClass='flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50';
const buttonClass='inline-flex items-center justify-center whitespace-nowrap rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50 bg-primary text-primary-foreground shadow hover:bg-primary/90 h-9 px-4 py-2';
function el(tag, text, className){const node=document.createElement(tag);if(text)node.textContent=text;if(className)node.className=className;return node;}
async function api(action, payload) {
  let token; try { token=JSON.parse(localStorage.getItem('XBOARD_ACCESS_TOKEN')||'null'); } catch { throw new Error('请重新登录后台'); }
  if(!token?.value || (token.expire!=null && token.expire<=Date.now())) throw new Error('请重新登录后台');
  const base=new URL(window.settings?.base_url||'/',location.origin);
  if(base.origin!==location.origin) throw new Error('后台接口必须同源');
  const url=base.pathname.replace(/\/$/,'')+'/api/v2/'+encodeURIComponent(window.settings.secure_path)+'/config/'+action;
  const response=await fetch(url,{method:payload?'POST':'GET',credentials:'same-origin',headers:{Authorization:token.value,'Content-Type':'application/json','Content-Language':'zh-CN'},...(payload?{body:JSON.stringify(payload)}:{})});
  const data=await response.json();
  if(!response.ok || data.status==='fail' || data.data===false) throw new Error(data.message||'请求失败，请检查输入');
  return data.data;
}
const groups=[
  ['发送渠道', [['enabled','启用邮件记录与分流','checkbox'],['resend_enabled','验证码、登录链接和工单通知优先 Resend','checkbox'],['resend_key','Resend API 密钥','password'],['resend_from','Resend 发件地址','email'],['resend_webhook_secret','Resend 回调签名密钥（选填）','password'],['reply_to','统一回复地址（常规邮箱）','email'],['daily_limit','日额度上限','number'],['monthly_limit','月额度上限','number']]],
  ['常规邮箱收件与自动回复', [['inbound_enabled','启用收件','checkbox'],['imap_host','IMAP 主机','text'],['imap_port','IMAP TLS 端口','number'],['imap_username','IMAP 用户名','text'],['imap_password','IMAP 密码','password'],['imap_folder','收件文件夹','text'],['auto_reply_enabled','自动确认收件（按发件地址限频）','checkbox'],['auto_reply_subject','自动回复标题','text'],['auto_reply_text','自动回复内容','textarea']]],
  ['每天八点汇报', [['report_enabled','启用 master 汇报','checkbox'],['master_url','Master 基础地址（HTTPS）','url'],['master_bot_code','Master 机器人代号','text'],['master_chat_code','Master 接收会话代号','text']]],
];
function control(key,label,type,value,configured){
  const wrap=el('div',null,'space-y-2');
  const id='mail-flow-'+key;
  const caption=el('label',label,'font-medium text-base');caption.htmlFor=id;wrap.append(caption);
  let input;
  if(type==='checkbox'){
    input=el('button');input.type='button';input.setAttribute('role','switch');input.checked=!!value;
    input.className='peer inline-flex h-5 w-9 shrink-0 cursor-pointer items-center rounded-full border-2 border-transparent shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-primary data-[state=unchecked]:bg-input';
    const thumb=el('span',null,'pointer-events-none block h-4 w-4 rounded-full bg-background shadow-lg ring-0 transition-transform data-[state=checked]:translate-x-4 data-[state=unchecked]:translate-x-0');input.append(thumb);
    const sync=()=>{const state=input.checked?'checked':'unchecked';input.dataset.state=state;thumb.dataset.state=state;input.setAttribute('aria-checked',String(input.checked));};
    input.addEventListener('click',()=>{input.checked=!input.checked;sync();});sync();
    const row=el('div',null,'flex items-center justify-between gap-4');wrap.replaceChildren(row);row.append(caption,input);
  }else{
    input=el(type==='textarea'?'textarea':'input');if(type!=='textarea')input.type=type;
    input.className=fieldClass+(type==='textarea'?' min-h-24 py-2':'');
    if(type==='password'){input.autocomplete='new-password';input.placeholder=configured?'已配置，留空保留':'尚未配置';}
    else input.value=value??'';
    if(type==='number'){input.step='1';input.min='1';if(key==='daily_limit')input.max='100';if(key==='monthly_limit')input.max='3000';if(key==='imap_port')input.max='65535';}
    wrap.append(input);
  }
  input.id=id;input.name=key;
  return {wrap,input,type};
}
async function render(host){
  const loading=el('p','正在读取邮件渠道设置…','text-sm text-muted-foreground');host.append(loading);
  try{
    const data=await api('mailFlowStatus');if(!host.isConnected)return;
    if(data.automatic_mail_level==null)throw new Error('自动邮件档位暂不可读取，请稍后重试');
    const form=el('form',null,'space-y-6');const inputs={};
    const policy=el('section',null,'space-y-4');policy.append(el('h3','自动邮件档位','text-lg font-semibold'));
    const tierWrap=el('div',null,'space-y-2');const label=el('label','自动邮件档位','font-medium text-base');label.htmlFor='mail-flow-tier';
    const tier=el('select');tier.id='mail-flow-tier';tier.name='automatic_mail_level';tier.className=fieldClass;
    for(const [value,text] of [[1,'一档：保持原有提醒'],[2,'二档：仅套餐到期时提醒'],[3,'三档：关闭自动批量提醒']]){const option=el('option',text);option.value=String(value);tier.append(option);}
    tier.value=String(data.automatic_mail_level);tierWrap.append(label,tier,el('p','管理员人工群发、验证码、登录邮件、工单回应通知和来信自动回复始终允许。到期通知须同时满足后台允许和用户未关闭提醒。','text-[0.8rem] text-muted-foreground'));policy.append(tierWrap);form.append(policy);
    for(const [title,fields] of groups){
      const section=el('section',null,'space-y-4 border-t pt-6');section.append(el('h3',title==='发送渠道'?'Resend 与邮件发送渠道':title,'text-lg font-semibold'));
      if(title==='发送渠道')section.append(el('p','Resend 额度不足时使用原常规邮箱。其他通知仍走常规邮箱；密钥留空保留现有值。','text-sm text-muted-foreground'));
      if(title==='常规邮箱收件与自动回复')section.append(el('p','收件及自动回复使用常规邮箱。每个发件地址北京时间每天仅回复一次，无需绑定网站账号。','text-sm text-muted-foreground'));
      if(title==='每天八点汇报')section.append(el('p','北京时间每天早上八点汇报；机器人和接收会话代号留空使用 master 默认配置。','text-sm text-muted-foreground'));
      for(const [key,text,type] of fields){const item=control(key,text,type,data.settings[key],data.settings[key+'_configured']);inputs[key]=item;section.append(item.wrap);}
      form.append(section);
    }
    const message=el('p',null,'text-sm text-muted-foreground');message.setAttribute('role','status');
    const save=el('button','保存邮件渠道设置',buttonClass);save.type='submit';form.append(message,save);
    form.addEventListener('submit',async event=>{
      event.preventDefault();if(!form.reportValidity())return;
      if((inputs.enabled.input.checked||Number(tier.value)===2)&&!data.database_ready){message.textContent='数据库尚未就绪，暂不可启用。';return;}
      if(inputs.inbound_enabled.input.checked&&!data.settings.inbound_enabled&&!data.imap_available){message.textContent='收件需要安装 PHP IMAP 扩展。';return;}
      const values={};for(const [key,{input,type}] of Object.entries(inputs)){
        if(type==='checkbox')values[key]=input.checked;
        else if(type==='password'&&!input.value)continue;
        else values[key]=type==='number'?Number(input.value):input.value;
      }
      save.disabled=true;message.textContent='正在保存…';
      try{await api('save',{mail_flow:values,automatic_mail_level:Number(tier.value)});message.textContent='邮件渠道设置已保存。';}
      catch(error){message.textContent=error.message;}
      finally{save.disabled=false;}
    });
    host.replaceChildren(form);
    const history=el('details',null,'border-t pt-6 mt-6');history.append(el('summary','邮件处理与汇报记录','cursor-pointer text-sm font-medium'));
    history.append(el('pre',data.messages.map(m=>`${m.created_at} · ${m.purpose} · ${m.channel||'待选择'} · ${m.status}`).join('\n')||'暂无邮件记录','text-xs whitespace-pre-wrap mt-4'));
    for(const incoming of data.messages.filter(m=>m.direction==='in')){
      const view=el('button','查看来信：'+incoming.email,buttonClass+' mt-3');view.type='button';const content=el('pre',null,'text-sm whitespace-pre-wrap mt-3');history.append(view,content);
      view.addEventListener('click',async()=>{view.disabled=true;try{const mail=await api('mailFlowIncoming?id='+encodeURIComponent(incoming.id));content.textContent=mail.subject+'\n\n'+mail.text;}catch(error){content.textContent=error.message;}finally{view.disabled=false;}});
    }
    history.append(el('pre','最近汇报：\n'+(data.reports.map(r=>r.report_date+' · '+r.status).join('\n')||'暂无汇报记录'),'text-xs whitespace-pre-wrap mt-4'));host.append(history);
  }catch(error){if(!host.isConnected)return;host.replaceChildren(el('p',error.message,'text-sm text-destructive'));const retry=el('button','重新读取',buttonClass+' mt-3');retry.type='button';retry.addEventListener('click',()=>{host.replaceChildren();render(host);});host.append(retry);}
}
function mount(){
  const current=document.getElementById('mail-flow-settings');
  const panel=location.hash.split('?')[0]==='#/config/system/email'?document.querySelector('#root [role="tabpanel"][data-state="active"]'):null;
  if(!panel?.querySelector('input[name="email_host"]')){current?.remove();return;}
  if(current?.parentElement===panel)return;
  current?.remove();const host=el('section',null,'border-t mt-6 pt-6');host.id='mail-flow-settings';panel.append(host);render(host);
}
let scheduled=false;
const schedule=()=>{if(scheduled)return;scheduled=true;requestAnimationFrame(()=>{scheduled=false;mount();});};
window.addEventListener('hashchange',schedule);
new MutationObserver(schedule).observe(document.getElementById('root'),{childList:true,subtree:true});schedule();