'use strict';
const ZhaoGeography=(()=>{
  const data=typeof ZhaoGeographyData!=='undefined'?ZhaoGeographyData:require('./data/geography-data.js');
  const esc=s=>String(s??'').replace(/[&<>"']/g,c=>({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[c]));
  const fields=['province','city','district'];
  const key=p=>p?p+'Geography':'geography';
  const legacy=(item,p,f)=>item[p?p+f[0].toUpperCase()+f.slice(1):f]||'';
  function infer(item={},prefix=''){
    if(item[key(prefix)])return {...item[key(prefix)]};
    const v={mode:'china',body:'地球',countryCode:'CN',country:'中国',path:''};
    let children=data.china,manual=false,valid=true;
    for(const f of fields){
      v[f]=legacy(item,prefix,f);const selected=children.find(x=>x.name===v[f]);v[f+'Code']=selected?.code||'';
      if(v[f]&&!selected&&!manual)valid=false;
      manual=manual||!!selected?.manual;children=selected?.children||[];
    }
    const country=legacy(item,prefix,'country');
    if(country&&country!=='中国'&&country!=='中华人民共和国'){
      const match=Object.entries(data.countries).find(([,name])=>name===country);
      v.mode=match?'world':'custom';v.country=country;v.countryCode=match?.[0]||'';
    }else if(!valid){v.mode='custom';v.country=country||'中国';}
    return v;
  }
  function change(v,field,value){
    const next={...v,[field]:value};
    if(field==='provinceCode'){next.cityCode='';next.city='';next.districtCode='';next.district='';}
    if(field==='cityCode'){next.districtCode='';next.district='';}
    if(field==='countryCode'){next.province='';next.city='';next.district='';if(value==='CN')next.mode='china';}
    if(field==='mode'){
      Object.assign(next,{body:'地球',countryCode:value==='china'?'CN':'',country:value==='china'?'中国':'',provinceCode:'',cityCode:'',districtCode:'',province:'',city:'',district:'',path:''});
    }
    if(next.mode==='china'){
      let children=data.china,manual=false;
      for(const f of fields){if(manual)continue;const selected=children.find(x=>x.code===next[f+'Code']);next[f]=selected?.name||'';children=selected?.children||[];manual=!!selected?.manual;}
      next.country='中国';next.body='地球';next.countryCode='CN';
    }else if(next.mode==='world')next.country=data.countries[next.countryCode]||'';
    return next;
  }
  function label(v){return [v.body&&v.body!=='地球'?v.body:'',v.country,v.province,v.city,v.district,v.path].filter(Boolean).filter((x,i,a)=>!i||x!==a[i-1]).join(' · ');}
  function describe(item,prefix=''){
    if(item[key(prefix)])return label(item[key(prefix)]);
    return ['country',...fields].map(f=>legacy(item,prefix,f)).filter(Boolean).join(' · ');
  }
  function fill(form,item={}){
    for(const root of form.querySelectorAll('[data-geography]')){
      const prefix=root.dataset.geography||'';let value=infer(item,prefix);
      const title=root.dataset.geoTitle||'地域';
      function draw(){
        const select=(field,text,options,disabled=false)=>`<label>${text}<select data-geo-field="${field}" aria-label="${esc(title+' · '+text)}" ${disabled?'disabled':''}>${options.map(([id,name])=>`<option value="${esc(id)}" ${value[field]===id?'selected':''}>${esc(name)}</option>`).join('')}</select></label>`;
        const input=(field,text,placeholder='')=>`<label>${text}<input data-geo-field="${field}" value="${esc(value[field]||'')}" maxlength="${field==='path'?1000:100}" placeholder="${esc(placeholder)}" aria-label="${esc(title+' · '+text)}"></label>`;
        let html=select('mode','地域范围',[['china','中国'],['world','世界 · 国家／地区'],['custom','自定义 · 历史地名／其他天体']]);
        if(value.mode==='china'){
          const province=data.china.find(x=>x.code===value.provinceCode),city=province?.children.find(x=>x.code===value.cityCode);
          html+=select('provinceCode','省／自治区／直辖市',[['','请选择（可留空）'],...data.china.map(x=>[x.code,x.name])]);
          if(province?.manual)html+=input('city','城市／地区')+input('district','区县／区域');
          else html+=select('cityCode','地级市／州／盟',[['','请选择（可留空）'],...(province?.children||[]).map(x=>[x.code,x.name])],!province)+select('districtCode','区／县／县级市',[['','请选择（可留空）'],...(city?.children||[]).map(x=>[x.code,x.name])],!city);
          html+='<p class="description full">选择上级后再选下级；变更上级会清空下级。内置区划为 2023 年数据，港澳台下级、新设区划或旧地名可手动填写或使用自定义。</p>';
        }else if(value.mode==='world'){
          html+=select('countryCode','国家／地区',[['','请选择'],...Object.entries(data.countries).sort((a,b)=>a[1].localeCompare(b[1],'zh-CN'))]);
          html+=input('province','州／省／一级行政区')+input('city','城市／二级行政区')+input('district','区县／地方行政区');
          html+='<p class="description full">国家／地区使用选项；各国层级不同，下级按当地名称填写，不适用可留空。</p>';
        }else{
          html+=input('body','天体／世界','例如：地球、月球、火星')+input('country','国家／地区（可空）')+input('province','省州／大区（可空）')+input('city','城市／区域（可空）')+input('district','区县／分区（可空）')+input('path','补充层级路径','例如：基地 / 居住区 / 一号楼');
          html+='<p class="description full">自定义内容按原文保存，适合历史地名或扩展地域；不做行政区划校验。</p>';
        }
        root.innerHTML=`<legend>${esc(title)}</legend><div class="form-grid">${html}</div><output class="geo-path" aria-live="polite">${esc(label(value)||'地域待选择')}</output>`;
      }
      root.onchange=e=>{const field=e.target.dataset.geoField;if(!field)return;value=change(value,field,e.target.value);if(e.target.tagName==='SELECT'){draw();root.querySelector(`[data-geo-field="${field}"]`)?.focus();}else root.querySelector('output').textContent=label(value);};
      root.oninput=e=>{const field=e.target.dataset.geoField;if(field&&e.target.tagName==='INPUT'){value[field]=e.target.value;root.querySelector('output').textContent=label(value);}};
      root.geoValue=()=>({...value});draw();
    }
  }
  function collect(form){return Object.fromEntries([...form.querySelectorAll('[data-geography]')].map(root=>[key(root.dataset.geography||''),root.geoValue()]));}
  return {infer,change,label,describe,fill,collect};
})();
if(typeof module!=='undefined')module.exports=ZhaoGeography;