var Hack = require('./hack');
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var Marker = require('../tokenizer/marker');
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var Token = require('../tokenizer/token');
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var Match = {
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ASTERISK: '*',
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BACKSLASH: '\\',
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BANG: '!',
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BANG_SUFFIX_PATTERN: /!\w+$/,
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IMPORTANT_TOKEN: '!important',
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IMPORTANT_TOKEN_PATTERN: new RegExp('!important$', 'i'),
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IMPORTANT_WORD: 'important',
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IMPORTANT_WORD_PATTERN: new RegExp('important$', 'i'),
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SUFFIX_BANG_PATTERN: /!$/,
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UNDERSCORE: '_',
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VARIABLE_REFERENCE_PATTERN: /var\(--.+\)$/
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};
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function wrapAll(properties, includeVariable, skipProperties) {
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var wrapped = [];
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var single;
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var property;
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var i;
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for (i = properties.length - 1; i >= 0; i--) {
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property = properties[i];
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if (property[0] != Token.PROPERTY) {
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continue;
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}
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if (!includeVariable && someVariableReferences(property)) {
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continue;
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}
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if (skipProperties && skipProperties.indexOf(property[1][1]) > -1) {
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continue;
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}
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single = wrapSingle(property);
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single.all = properties;
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single.position = i;
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wrapped.unshift(single);
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}
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return wrapped;
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}
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function someVariableReferences(property) {
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var i, l;
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var value;
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// skipping `property` and property name tokens
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for (i = 2, l = property.length; i < l; i++) {
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value = property[i];
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if (value[0] != Token.PROPERTY_VALUE) {
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continue;
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}
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if (isVariableReference(value[1])) {
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return true;
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}
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}
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return false;
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}
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function isVariableReference(value) {
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return Match.VARIABLE_REFERENCE_PATTERN.test(value);
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}
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function isMultiplex(property) {
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var value;
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var i, l;
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for (i = 3, l = property.length; i < l; i++) {
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value = property[i];
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if (value[0] == Token.PROPERTY_VALUE && (value[1] == Marker.COMMA || value[1] == Marker.FORWARD_SLASH)) {
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return true;
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}
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}
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return false;
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}
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function hackFrom(property) {
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var match = false;
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var name = property[1][1];
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var lastValue = property[property.length - 1];
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if (name[0] == Match.UNDERSCORE) {
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match = [Hack.UNDERSCORE];
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} else if (name[0] == Match.ASTERISK) {
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match = [Hack.ASTERISK];
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} else if (lastValue[1][0] == Match.BANG && !lastValue[1].match(Match.IMPORTANT_WORD_PATTERN)) {
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match = [Hack.BANG];
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} else if (lastValue[1].indexOf(Match.BANG) > 0 && !lastValue[1].match(Match.IMPORTANT_WORD_PATTERN) && Match.BANG_SUFFIX_PATTERN.test(lastValue[1])) {
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match = [Hack.BANG];
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} else if (lastValue[1].indexOf(Match.BACKSLASH) > 0 && lastValue[1].indexOf(Match.BACKSLASH) == lastValue[1].length - Match.BACKSLASH.length - 1) {
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match = [Hack.BACKSLASH, lastValue[1].substring(lastValue[1].indexOf(Match.BACKSLASH) + 1)];
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} else if (lastValue[1].indexOf(Match.BACKSLASH) === 0 && lastValue[1].length == 2) {
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match = [Hack.BACKSLASH, lastValue[1].substring(1)];
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}
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return match;
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}
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function isImportant(property) {
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if (property.length < 3)
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return false;
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var lastValue = property[property.length - 1];
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if (Match.IMPORTANT_TOKEN_PATTERN.test(lastValue[1])) {
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return true;
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} else if (Match.IMPORTANT_WORD_PATTERN.test(lastValue[1]) && Match.SUFFIX_BANG_PATTERN.test(property[property.length - 2][1])) {
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return true;
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}
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return false;
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}
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function stripImportant(property) {
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var lastValue = property[property.length - 1];
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var oneButLastValue = property[property.length - 2];
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if (Match.IMPORTANT_TOKEN_PATTERN.test(lastValue[1])) {
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lastValue[1] = lastValue[1].replace(Match.IMPORTANT_TOKEN_PATTERN, '');
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} else {
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lastValue[1] = lastValue[1].replace(Match.IMPORTANT_WORD_PATTERN, '');
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oneButLastValue[1] = oneButLastValue[1].replace(Match.SUFFIX_BANG_PATTERN, '');
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}
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if (lastValue[1].length === 0) {
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property.pop();
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}
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if (oneButLastValue[1].length === 0) {
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property.pop();
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}
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}
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function stripPrefixHack(property) {
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property[1][1] = property[1][1].substring(1);
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}
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function stripSuffixHack(property, hackFrom) {
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var lastValue = property[property.length - 1];
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lastValue[1] = lastValue[1]
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.substring(0, lastValue[1].indexOf(hackFrom[0] == Hack.BACKSLASH ? Match.BACKSLASH : Match.BANG))
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.trim();
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if (lastValue[1].length === 0) {
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property.pop();
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}
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}
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function wrapSingle(property) {
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var importantProperty = isImportant(property);
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if (importantProperty) {
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stripImportant(property);
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}
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var whichHack = hackFrom(property);
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if (whichHack[0] == Hack.ASTERISK || whichHack[0] == Hack.UNDERSCORE) {
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stripPrefixHack(property);
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} else if (whichHack[0] == Hack.BACKSLASH || whichHack[0] == Hack.BANG) {
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stripSuffixHack(property, whichHack);
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}
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return {
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block: property[2] && property[2][0] == Token.PROPERTY_BLOCK,
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components: [],
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dirty: false,
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hack: whichHack,
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important: importantProperty,
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name: property[1][1],
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multiplex: property.length > 3 ? isMultiplex(property) : false,
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position: 0,
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shorthand: false,
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unused: false,
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value: property.slice(2)
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};
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}
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module.exports = {
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all: wrapAll,
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single: wrapSingle
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};
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