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function strip(h){if(!h)return"";var d=document.createElement("div");d.innerHTML=h;d.querySelectorAll('[style*="display:none"],[style*="display: none"]').forEach(function(el){el.remove()});return d.textContent.trim()}
function esc(s){return s.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/"/g,"&quot;")}
function yr(s){var m=(s||"").match(/\b(19|20)\d{2}\b/);return m?m[0]:""}
function absUrl(href,base){try{return new URL(href,base).href}catch(e){return href}}
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function setBusy(b){var btn=$i("tasl-gobtn");btn.disabled=b;btn.textContent=b?"Looking up…":"Look it up";}
function loadImg(src){var img=$i("tasl-img");img.style.display="none";$i("tasl-imgph").style.display="flex";img.src=src;}
function detectType(url){try{var u=new URL(url),h=u.hostname;if(h.includes("commons.wikimedia.org"))return"wm-commons";if(h.includes("upload.wikimedia.org"))return"wm-upload";if(/\.(jpe?g|png|gif|webp|svg|tiff?)(\?|$)/i.test(u.pathname))return"direct-img";return"webpage";}catch(e){return"invalid"}}
function wmFilename(url){try{var u=new URL(url);var m1=u.pathname.match(/\/wiki\/(File:[^?#]+)/i);if(m1)return decodeURIComponent(m1[1]);var m2=u.pathname.match(/\/wikipedia\/commons(?:\/thumb)?\/[a-f0-9]\/[a-f0-9]+\/([^/]+?)(?:\/|$)/i);if(m2)return"File:"+decodeURIComponent(m2[1]);}catch(e){}return null;}
function parseArtist(html){if(!html)return{name:"",url:""};var d=document.createElement("div");d.innerHTML=html;d.querySelectorAll('[style*="display:none"],[style*="display: none"]').forEach(function(el){el.remove()});var name="",url="";var links=d.querySelectorAll("a");if(links.length){name=links[0].textContent.trim();links.forEach(function(a){if(url)return;var h=a.getAttribute("href")||"";if(h.startsWith("https://")||h.startsWith("http://"))url=h;else if(h.startsWith("//"))url="https:"+h;});}else{name=d.textContent.trim();}
return{name:name,url:url};}
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var type=detectType(raw);if(type==="invalid"){setStatus("error","⚠","That doesn't look like a valid URL. Make sure it starts with https://");return}
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var api="https://commons.wikimedia.org/w/api.php?action=query&titles="+encodeURIComponent(fname)+"&prop=imageinfo&iiprop=url|user|extmetadata|size&iiextmetadatalanguage=en&format=json&origin=*";fetch(api).then(function(r){return r.json()}).then(function(data){var page=Object.values(data.query.pages)[0];if(!page||page.missing!==undefined){setStatus("error","✗","File not found on Wikimedia Commons. Check the URL.");setBusy(false);return}
var info=page.imageinfo[0],m=info.extmetadata||{};var pageLink="https://commons.wikimedia.org/wiki/"+encodeURIComponent(fname);var title=strip(m.ObjectName&&m.ObjectName.value||m.Title&&m.Title.value||fname.replace(/^File:/,"").replace(/\.[^.]+$/,""));var artistParsed=parseArtist(m.Artist&&m.Artist.value||"");var author=artistParsed.name||strip(info.user||"");var authorUrl=artistParsed.url;var licShort=(m.LicenseShortName&&m.LicenseShortName.value||"").trim();var licUrl=m.LicenseUrl&&m.LicenseUrl.value||"";var year=yr(strip(m.DateTimeOriginal&&m.DateTimeOriginal.value||m.DateTime&&m.DateTime.value||""));setF("title",title,!!title);setF("author",author,!!author);setF("authorurl",authorUrl,!!authorUrl);setF("source",pageLink,true);loadImg(info.url);if(info.width&&info.height)$i("tasl-imgcap").textContent=info.width+" × "+info.height+" px";var licOk=applyLicKey(licShort.toLowerCase())||applyLicUrl(licUrl);if(year){$i("tasl-yr").checked=true;$i("tasl-yrwrap").style.display="inline";$i("tasl-yrval").value=year}
var filled=[title,author,pageLink].filter(Boolean).length;setStatus("success","✓",filled+" of 3 TASL fields auto-filled."+(licOk?" License detected: "+licShort+".":' License "'+licShort+'" — please select it manually.')+" Always verify before publishing.");setBusy(false);taslGen();}).catch(function(e){setStatus("error","✗","Couldn't reach Wikimedia: "+e.message+". Check your connection and try again.");setBusy(false);});}
function fetchProxy(pageUrl){setStatus("loading",null,"Fetching page… (a public CORS proxy is used — only the URL is sent, no personal data)");var proxyUrl="https://api.allorigins.win/get?url="+encodeURIComponent(pageUrl);fetch(proxyUrl).then(function(r){if(!r.ok)throw new Error("Proxy returned "+r.status);return r.json();}).then(function(json){if(!json.contents)throw new Error("Empty page.");var doc=new DOMParser().parseFromString(json.contents,"text/html");function getMeta(names){for(var i=0;i<names.length;i++){var el=doc.querySelector('meta[property="'+names[i]+'"],meta[name="'+names[i]+'"]');if(el&&el.content&&el.content.trim())return el.content.trim()}return""}
var title=getMeta(["og:title","twitter:title","title"])||doc.title||"";var author=getMeta(["author","article:author","og:author","dc.creator"]);var image=getMeta(["og:image","twitter:image"]);var licEl=doc.querySelector('link[rel="license"]')||doc.querySelector('a[rel="license"]');var licHref=licEl?(licEl.getAttribute("href")||""):"";title=title.replace(/\s*[|—–\-]\s*.{1,40}$/,"").trim();setF("title",title,!!title);setF("author",author,!!author);setF("source",pageUrl,true);if(image)loadImg(absUrl(image,pageUrl));var licOk=licHref?applyLicUrl(absUrl(licHref,pageUrl)):false;var filled=[title,author].filter(Boolean).length;setStatus(filled>0?"partial":"partial","ℹ️",filled>0?"Found "+filled+" field(s) from page metadata."+(licOk?" License detected.":" Please select the license manually.")+" Review all fields carefully.":"Couldn't find metadata automatically on this page. Please fill in the fields manually — check the image's original page for author and license details.");setBusy(false);taslGen();}).catch(function(){setStatus("error","✗","Couldn't fetch this page automatically. Please fill in the fields manually — the information is usually listed near the image on its original website.");setBusy(false);});}
function applyLicKey(key){key=(key||"").trim().toLowerCase();if(!LIC_MAP[key])return false;setLicUI(LIC_MAP[key][0],LIC_MAP[key][1],true);return true;}
function applyLicUrl(url){if(!url)return false;var u=url.toLowerCase();if(u.includes("/zero/")){setLicUI("CC0","1.0",true);return true}
if(u.includes("/publicdomain/mark")){setLicUI("Public Domain","",true);return true}
var m=u.match(/\/licenses\/(by(?:-sa|-nd|-nc|-nc-sa|-nc-nd)?)\/([\d.]+)/i);if(m){var k="CC "+m[1].toUpperCase();if(LICS[k]){setLicUI(k,m[2],true);return true}}
return false;}
function setLicUI(lic,ver,auto){document.querySelectorAll("#tasl-app .t-lopt").forEach(function(o){o.classList.remove("sel","taf")});var el=document.querySelector("#tasl-app .t-lopt[data-lic='"+lic+"']");if(el){el.classList.add("sel");if(auto)el.classList.add("taf")}
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else{vs.disabled=!(LICS[lic]&&LICS[lic].ver)}
note.style.display=auto?"inline":"none";}
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function buildHtml(d){if(!d.licUrl)return"";var p=[];if(d.title)p.push(d.source?'<a href="'+esc(d.source)+'">"'+esc(d.title)+'"</a>':'"'+esc(d.title)+'"');if(d.author){p.push((d.authorUrl?'by <a href="'+esc(d.authorUrl)+'">'+esc(d.author)+"</a>":"by "+esc(d.author))+(d.year?" ("+d.year+")":""));}else if(d.year)p.push("("+d.year+")");p.push(d.modified?"is adapted and shared under":"is licensed under");p.push('<a href="'+esc(d.licUrl)+'">'+esc(d.licName)+"</a>");return p.join(" ");}
function buildMd(d){if(!d.licUrl)return"";var p=[];if(d.title)p.push(d.source?'["'+d.title+'"]('+d.source+')':'"'+d.title+'"');if(d.author){p.push((d.authorUrl?"by ["+d.author+"]("+d.authorUrl+")":"by "+d.author)+(d.year?" ("+d.year+")":""));}else if(d.year)p.push("("+d.year+")");p.push(d.modified?"is adapted and shared under":"is licensed under");p.push("["+d.licName+"]("+d.licUrl+")");return p.join(" ");}
function buildPlain(d){if(!d.licUrl)return"";var lines=[];if(d.title)lines.push("Title: "+d.title);if(d.author)lines.push("Author: "+d.author+(d.year?" ("+d.year+")":""));if(d.authorUrl)lines.push("Author profile: "+d.authorUrl);if(d.source)lines.push("Source: "+d.source);lines.push("License: "+d.licName);lines.push("License URL: "+d.licUrl);if(d.modified)lines.push("(This is an adaptation of the original work.)");return lines.join("\n");}
window.taslGen=function(){var d=getData(),h=buildHtml(d),md=buildMd(d),pt=buildPlain(d);var pv=$i("tasl-out-preview");if(h){pv.innerHTML=h;pv.classList.remove("empty")}
else{pv.textContent="Select a license above to generate your attribution.";pv.classList.add("empty")}
$i("tasl-out-html").textContent=h;$i("tasl-out-markdown").textContent=md;$i("tasl-out-plain").textContent=pt;};window.taslTab=function(tab,btn){activeTab=tab;document.querySelectorAll("#tasl-app .t-tab").forEach(function(b){b.classList.remove("on")});document.querySelectorAll("#tasl-app .t-panel").forEach(function(p){p.classList.remove("on")});btn.classList.add("on");$i("tasl-panel-"+tab).classList.add("on");};window.taslCopy=function(){var map={preview:"tasl-out-preview",html:"tasl-out-html",markdown:"tasl-out-markdown",plain:"tasl-out-plain"};var text=($i(map[activeTab]).textContent||"").trim();if(!text||text==="Select a license above to generate your attribution.")return;function showToast(){var t=$i("tasl-toast");t.textContent="Copied!";t.classList.add("show");setTimeout(function(){t.classList.remove("show")},2200)}
if(navigator.clipboard){navigator.clipboard.writeText(text).then(showToast).catch(function(){fb(text,showToast)})}
else fb(text,showToast);function fb(t,cb){var ta=document.createElement("textarea");ta.value=t;ta.style.cssText="position:fixed;opacity:0";document.body.appendChild(ta);ta.select();document.execCommand("copy");document.body.removeChild(ta);cb()}};taslGen();})();