"use strict";var e=require("@csstools/postcss-progressive-custom-properties"),o=require("@csstools/css-tokenizer"),r=require("@csstools/utilities"),t=require("@csstools/css-parser-algorithms");const s="--csstools-color-scheme--dark",n="initial";function toggleNameGenerator(e){return`--csstools-light-dark-toggle--${e}`}const i=/dark/i,a=/light/i;function colorSchemes(e){const r=o.tokenize({css:e});let t=!1,s=!1;return r.forEach((e=>{o.isTokenIdent(e)&&(a.test(e[4].value)?t=!0:i.test(e[4].value)&&(s=!0))})),[t,s]}const c=/^light-dark$/i;function isComma(e){return t.isTokenNode(e)&&o.isTokenComma(e.value)}function parseLightDark(e){if(!t.isFunctionNode(e)||!c.test(e.getName()))return!1;const o=e.value.filter((e=>!t.isWhitespaceNode(e)&&!t.isCommentNode(e)));if(3!==o.length)return!1;let r=o[0];const s=o[1];let n=o[2];if(!r||!s||!n)return!1;if(!isComma(s))return!1;if(isComma(r)||isComma(n))return!1;if(t.isFunctionNode(r)){const e=[r];t.walk(e,(({node:e,parent:o},r)=>{recurseLightDark(e,o,r,!0)})),[r]=e}if(t.isFunctionNode(n)){const e=[n];t.walk(e,(({node:e,parent:o},r)=>{recurseLightDark(e,o,r,!1)})),[n]=e}return[r,n]}function recurseLightDark(e,o,r,s){if("number"!=typeof r)return;const n=parseLightDark(e);if(!n)return;let i=n[s?0:1];if(t.isFunctionNode(i)){const e=[i];t.walk(e,(({node:e,parent:o},r)=>{recurseLightDark(e,o,r,s)})),[i]=e}o.value[r]=i}function transformLightDark(e,r){const n=new Map,i=t.replaceComponentValues(t.parseCommaSeparatedListOfComponentValues(o.tokenize({css:e})),(e=>{const i=parseLightDark(e);if(!i)return;const[a,c]=i,l=r();return n.set(l,`var(${s}) ${a.toString()}`),new t.FunctionNode([o.TokenType.Function,"var(",-1,-1,{value:"var"}],[o.TokenType.CloseParen,")",-1,-1,void 0],[new t.TokenNode([o.TokenType.Ident,l,-1,-1,{value:l}]),new t.TokenNode([o.TokenType.Comma,",",-1,-1,void 0]),new t.WhitespaceNode([[o.TokenType.Whitespace," ",-1,-1,void 0]]),c])}));return{value:t.stringify(i),toggles:n}}const l=/^color-scheme$/i,u=/\blight-dark\(/i,basePlugin=e=>({postcssPlugin:"postcss-light-dark-function",prepare(){let o=0;const currentToggleNameGenerator=()=>toggleNameGenerator(o++);return{postcssPlugin:"postcss-light-dark-function",Declaration(o,{atRule:t,rule:i}){const a=o.parent;if(a){if(l.test(o.prop)){if(a.some((e=>"decl"===e.type&&e.prop===s)))return;const[e,r]=colorSchemes(o.value);if(e&&r){o.cloneBefore({prop:s,value:" "});const e=a.clone();e.removeAll(),e.append(o.clone({prop:s,value:n}));const r=t({name:"media",params:"(prefers-color-scheme: dark)",source:a.source});return r.append(e),void a.after(r)}return r?void o.cloneBefore({prop:s,value:n}):e?void o.cloneBefore({prop:s,value:" "}):void 0}if(u.test(o.value)){if(r.hasFallback(o))return;if(r.hasSupportsAtRuleAncestor(o,u))return;const t=transformLightDark(o.value,currentToggleNameGenerator);if(t.value===o.value)return;for(const[e,r]of t.toggles)o.cloneBefore({prop:e,value:r});if(o.cloneBefore({value:t.value}),o.variable&&o.parent){const e=i({selector:"& *",source:o.source});for(const[r,s]of t.toggles)e.append(o.clone({prop:r,value:s}));e.append(o.clone({value:t.value})),o.parent.append(e)}e?.preserve||o.remove()}}}}}});basePlugin.postcss=!0;const postcssPlugin=o=>{const r=Object.assign({enableProgressiveCustomProperties:!0,preserve:!0},o);return r.enableProgressiveCustomProperties&&r.preserve?{postcssPlugin:"postcss-light-dark-function",plugins:[e(),basePlugin(r)]}:basePlugin(r)};postcssPlugin.postcss=!0,module.exports=postcssPlugin;