'use strict';
Object.assign(MESSAGES.zh,{'source-browser':'从来源选入照片'});
Object.assign(MESSAGES.en,{'source-browser':'Import from source'});
icons['source-browser']='▧';
const sourceBrowser={source:null,filters:{},offset:0,previous:[]};
function openSourceBrowser(sourceId){sourceBrowser.source=sourceId;sourceBrowser.offset=0;sourceBrowser.previous=[];return navigate('source-browser');}
views['source-browser']=async function(epoch){
 const sources=await api('/api/v1/source-libraries');if(epoch!==state.epoch)return;
 if(!sources.length)return navigate('gallery');
 if(!sources.some(s=>s.id===sourceBrowser.source)){sourceBrowser.source=sources[0].id;sourceBrowser.filters={};sourceBrowser.offset=0;sourceBrowser.previous=[];}
 const source=sources.find(s=>s.id===sourceBrowser.source),nas=source.kind==='synology-photos',f=sourceBrowser.filters;
 const input=(name,label,type='text',extra='')=>`<div class="field"><label for="browse-${name}">${label}</label><input id="browse-${name}" name="${name}" type="${type}" value="${esc(f[name]||'')}" ${extra}></div>`;
 $('#main').innerHTML=`<section class="card"><div class="library-source-toolbar"><div class="field"><label for="browse-source">${tr('照片来源','Photo source')}</label><select id="browse-source">${librarySelectOptions(sources,source.id,'')}</select></div><button id="browse-back">${tr('返回来源图库','Back to source library')}</button></div><p class="hint">${tr('按批读取照片信息，预览仅在进入可视区域时加载；选入后保存在本地，不会推送设备。','Reads metadata in bounded batches and loads previews on demand. Import stores locally without sending to devices.')}</p><form id="source-browser-filters"><fieldset ${nas?'':'disabled'}><div class="source-browser-filters">${input('filename',tr('文件名关键字','Filename keyword'),'search','maxlength="200"')}${input('folder',tr('文件夹关键字','Folder keyword'),'search','maxlength="500"')}${input('min_mb',tr('最小文件大小（MB）','Min file size (MB)'),'number','min="0" step="0.1" max="1000000"')}${input('max_mb',tr('最大文件大小（MB）','Max file size (MB)'),'number','min="0" step="0.1" max="1000000"')}${input('min_width',tr('最小宽度（px）','Min width (px)'),'number','min="0" max="100000"')}${input('max_width',tr('最大宽度（px）','Max width (px)'),'number','min="0" max="100000"')}${input('min_height',tr('最小高度（px）','Min height (px)'),'number','min="0" max="100000"')}${input('max_height',tr('最大高度（px）','Max height (px)'),'number','min="0" max="100000"')}<div class="field"><label for="browse-date_field">${tr('日期类型','Date type')}</label><select name="date_field" id="browse-date_field"><option value="indexed_time" ${f.date_field!=='time'?'selected':''}>${tr('NAS 创建／入库日期','NAS indexed date')}</option><option value="time" ${f.date_field==='time'?'selected':''}>${tr('照片拍摄日期','Photo date')}</option></select></div>${input('date_from',tr('开始日期','From date'),'date')}${input('date_to',tr('结束日期（含当天）','Through date (inclusive)'),'date')}<div class="field"><label for="browse-person_id">${tr('人物识别','Recognized person')}</label><select id="browse-person_id" name="person_id"><option value="">${tr('不限人物','Any person')}</option>${f.person_id?`<option value="${esc(f.person_id)}" selected>${esc(f.person_name||f.person_id)}</option>`:''}</select><small id="browse-people-status" class="hint"></small></div></div><div class="actions"><button type="submit" class="primary">${tr('搜索 / 筛选','Search / Filter')}</button><button type="reset">${tr('重置','Reset')}</button></div></fieldset></form><p class="hint">${nas?tr('筛选在当前来源设置范围内进行；日期使用系统时区，入库日期不等同于原文件的创建时间。筛选较少见照片时，可继续下一页检索，页面不会等待全库扫描。','Filters stay within this source. Dates use the system timezone; indexed dates are not original file creation dates. Continue through pages for rare matches without waiting for a full scan.'):tr('此来源使用现有目录接口；高级筛选和快速分页目前支持 Synology Photos。','This provider uses its existing catalog. Advanced filters and fast paging currently support Synology Photos.')}</p></section><p id="browse-status" role="status">${tr('正在读取本批照片…','Reading this batch…')}</p><div id="browse-gallery" class="gallery source-browser-gallery" aria-busy="true"></div><div class="actions library-pagination"><button id="browse-prev" ${sourceBrowser.previous.length?'':'disabled'}>${tr('上一页','Previous')}</button><button id="browse-next" disabled>${tr('下一页','Next')}</button></div>`;
 bind('browse-back',()=>{libraryUI.source=source.id;libraryUI.offset=0;return navigate('gallery');});
 $('#browse-source').onchange=()=>{sourceBrowser.filters={};return openSourceBrowser($('#browse-source').value);};
 $('#source-browser-filters').onsubmit=busy(async e=>{e.preventDefault();const values=Object.fromEntries(new FormData(e.currentTarget));const people=$('#browse-person_id');sourceBrowser.filters={...values,person_name:people.selectedOptions[0]?.textContent||''};sourceBrowser.offset=0;sourceBrowser.previous=[];await navigate();});
 $('#source-browser-filters').onreset=e=>{e.preventDefault();sourceBrowser.filters={};sourceBrowser.offset=0;sourceBrowser.previous=[];navigate();};
 const params=new URLSearchParams({offset:sourceBrowser.offset,limit:36});for(const [key,value] of Object.entries(f)){if(value!==''&&key!=='person_name'&&!key.endsWith('_mb'))params.set(key,value);}for(const [key,target] of [['min_mb','min_bytes'],['max_mb','max_bytes']])if(f[key]!==undefined&&f[key]!=='')params.set(target,Math.round(Number(f[key])*1024*1024));
 if(nas)loadBrowserPeople(source,epoch);
 let page;try{page=await api('/api/v1/source-libraries/'+encodeURIComponent(source.id)+'/browse?'+params);}catch(error){if(epoch!==state.epoch)return;$('#browse-status').textContent=error.message;$('#browse-gallery').setAttribute('aria-busy','false');return;}
 if(epoch!==state.epoch)return;
 $('#browse-status').textContent=tr(`本批找到 ${page.items.length} 张照片${page.paged_provider?`，检查 ${page.scanned} 条记录`:''}。${!page.items.length&&page.next_offset!==null?'可继续下一页检索。':''}`,`${page.items.length} matches in this batch${page.paged_provider?`, ${page.scanned} records checked`:''}.${!page.items.length&&page.next_offset!==null?' Continue to the next batch.':''}`);
 $('#browse-gallery').innerHTML=page.items.map((item,i)=>`<article class="card image-card"><button class="image-preview" data-browse-preview="${i}" ${item.preview_url?'':'disabled'}>${item.preview_url?`<img class="thumb" alt="${esc(item.name)}" data-src="${esc(item.preview_url)}">`:`<span class="empty">${tr('选入后预览','Preview after import')}</span>`}</button><h3 title="${esc(item.name)}">${esc(item.name)}</h3><small class="browse-folder">${esc(item.folder||item.source_path||'')}</small><small>${item.width&&item.height?`${item.width} × ${item.height} px · `:''}${item.filesize?`${(item.filesize/1024/1024).toFixed(2)} MB`:''}</small><small>${item.indexed_time?tr('入库：','Indexed: ')+esc(fmt(new Date(item.indexed_time*1000).toISOString())):''}</small><small>${item.time?tr('拍摄：','Photo: ')+esc(fmt(new Date(item.time*1000).toISOString())):''}</small><small>${esc((item.people||[]).map(p=>p.name).filter(Boolean).join('、'))}</small><div class="actions"><button data-browse-preview="${i}" ${item.preview_url?'':'disabled'}>${tr('预览','Preview')}</button><button class="primary" data-browse-import="${i}">${tr('选入本地','Import locally')}</button></div></article>`).join('');$('#browse-gallery').setAttribute('aria-busy','false');
 $('#browse-next').disabled=page.next_offset===null;
 $('#browse-next').textContent=tr('继续读取','Read next batch');
 if(!page.items.length)$('#browse-gallery').innerHTML=`<section class="card empty"><p>${page.next_offset!==null?tr('本批未找到匹配照片，不代表整个来源没有结果。请继续读取下一批。','No matches in this batch. This does not mean the entire source has no results. Read the next batch.'):tr('已读至来源末尾，当前筛选范围内没有更多结果。','End of source reached. No further results for these filters.')}</p></section>`;

 bind('browse-prev',()=>{sourceBrowser.offset=sourceBrowser.previous.pop()||0;return navigate();});
 bind('browse-next',()=>{if(page.next_offset===null)return;sourceBrowser.previous.push(sourceBrowser.offset);sourceBrowser.offset=page.next_offset;return navigate();});
 document.querySelectorAll('[data-browse-preview]').forEach(b=>b.onclick=busy(()=>{const item=page.items[b.dataset.browsePreview];return openImageViewer(item.preview_url,item.name);}));
 document.querySelectorAll('[data-browse-import]').forEach(b=>b.onclick=busy(async()=>{const item=page.items[b.dataset.browseImport];await api('/api/v1/source-libraries/'+encodeURIComponent(source.id)+'/import',{method:'POST',body:{item_id:item.id}});if(epoch!==state.epoch)return;b.textContent=tr('已选入','Imported');b.disabled=true;libraryUI.offset=0;toast(tr('已保存到来源图库','Saved in source library'));}));
 hydrateImages();
};
async function loadBrowserPeople(source,epoch){
 try{const people=await api('/api/v1/integrations/synology-photos/people?space='+encodeURIComponent(source.people_space||'shared'));if(epoch!==state.epoch)return;$('#browse-person_id').innerHTML='<option value="">'+tr('不限人物','Any person')+'</option>'+people.map(p=>`<option value="${p.id}" ${String(p.id)===String(sourceBrowser.filters.person_id)?'selected':''}>${esc(p.named?p.name:tr('未命名人物 ','Unnamed person ')+p.id)} (${p.count})</option>`).join('');}catch(error){if(epoch===state.epoch)$('#browse-people-status').textContent=tr('人物列表暂不可用，可继续浏览照片','People unavailable; photo browsing remains available');}
}