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var roundingPrecisionFrom = require('./rounding-precision').roundingPrecisionFrom;
var override = require('../utils/override');
var OptimizationLevel = {
Zero: '0',
One: '1',
Two: '2'
};
var DEFAULTS = {};
DEFAULTS[OptimizationLevel.Zero] = {};
DEFAULTS[OptimizationLevel.One] = {
cleanupCharsets: true,
normalizeUrls: true,
optimizeBackground: true,
optimizeBorderRadius: true,
optimizeFilter: true,
optimizeFontWeight: true,
optimizeOutline: true,
removeEmpty: true,
removeNegativePaddings: true,
removeQuotes: true,
removeWhitespace: true,
replaceMultipleZeros: true,
replaceTimeUnits: true,
replaceZeroUnits: true,
roundingPrecision: roundingPrecisionFrom(undefined),
selectorsSortingMethod: 'standard',
specialComments: 'all',
tidyAtRules: true,
tidyBlockScopes: true,
tidySelectors: true,
transform: noop
};
DEFAULTS[OptimizationLevel.Two] = {
mergeAdjacentRules: true,
mergeIntoShorthands: true,
mergeMedia: true,
mergeNonAdjacentRules: true,
mergeSemantically: false,
overrideProperties: true,
removeEmpty: true,
reduceNonAdjacentRules: true,
removeDuplicateFontRules: true,
removeDuplicateMediaBlocks: true,
removeDuplicateRules: true,
removeUnusedAtRules: false,
restructureRules: false,
skipProperties: []
};
var ALL_KEYWORD_1 = '*';
var ALL_KEYWORD_2 = 'all';
var FALSE_KEYWORD_1 = 'false';
var FALSE_KEYWORD_2 = 'off';
var TRUE_KEYWORD_1 = 'true';
var TRUE_KEYWORD_2 = 'on';
var LIST_VALUE_SEPARATOR = ',';
var OPTION_SEPARATOR = ';';
var OPTION_VALUE_SEPARATOR = ':';
function noop() {}
function optimizationLevelFrom(source) {
var level = override(DEFAULTS, {});
var Zero = OptimizationLevel.Zero;
var One = OptimizationLevel.One;
var Two = OptimizationLevel.Two;
if (undefined === source) {
delete level[Two];
return level;
}
if (typeof source == 'string') {
source = parseInt(source);
}
if (typeof source == 'number' && source === parseInt(Two)) {
return level;
}
if (typeof source == 'number' && source === parseInt(One)) {
delete level[Two];
return level;
}
if (typeof source == 'number' && source === parseInt(Zero)) {
delete level[Two];
delete level[One];
return level;
}
if (typeof source == 'object') {
source = covertValuesToHashes(source);
}
if (One in source && 'roundingPrecision' in source[One]) {
source[One].roundingPrecision = roundingPrecisionFrom(source[One].roundingPrecision);
}
if (Two in source && 'skipProperties' in source[Two] && typeof(source[Two].skipProperties) == 'string') {
source[Two].skipProperties = source[Two].skipProperties.split(LIST_VALUE_SEPARATOR);
}
if (Zero in source || One in source || Two in source) {
level[Zero] = override(level[Zero], source[Zero]);
}
if (One in source && ALL_KEYWORD_1 in source[One]) {
level[One] = override(level[One], defaults(One, normalizeValue(source[One][ALL_KEYWORD_1])));
delete source[One][ALL_KEYWORD_1];
}
if (One in source && ALL_KEYWORD_2 in source[One]) {
level[One] = override(level[One], defaults(One, normalizeValue(source[One][ALL_KEYWORD_2])));
delete source[One][ALL_KEYWORD_2];
}
if (One in source || Two in source) {
level[One] = override(level[One], source[One]);
} else {
delete level[One];
}
if (Two in source && ALL_KEYWORD_1 in source[Two]) {
level[Two] = override(level[Two], defaults(Two, normalizeValue(source[Two][ALL_KEYWORD_1])));
delete source[Two][ALL_KEYWORD_1];
}
if (Two in source && ALL_KEYWORD_2 in source[Two]) {
level[Two] = override(level[Two], defaults(Two, normalizeValue(source[Two][ALL_KEYWORD_2])));
delete source[Two][ALL_KEYWORD_2];
}
if (Two in source) {
level[Two] = override(level[Two], source[Two]);
} else {
delete level[Two];
}
return level;
}
function defaults(level, value) {
var options = override(DEFAULTS[level], {});
var key;
for (key in options) {
if (typeof options[key] == 'boolean') {
options[key] = value;
}
}
return options;
}
function normalizeValue(value) {
switch (value) {
case FALSE_KEYWORD_1:
case FALSE_KEYWORD_2:
return false;
case TRUE_KEYWORD_1:
case TRUE_KEYWORD_2:
return true;
default:
return value;
}
}
function covertValuesToHashes(source) {
var clonedSource = override(source, {});
var level;
var i;
for (i = 0; i <= 2; i++) {
level = '' + i;
if (level in clonedSource && (clonedSource[level] === undefined || clonedSource[level] === false)) {
delete clonedSource[level];
}
if (level in clonedSource && clonedSource[level] === true) {
clonedSource[level] = {};
}
if (level in clonedSource && typeof clonedSource[level] == 'string') {
clonedSource[level] = covertToHash(clonedSource[level], level);
}
}
return clonedSource;
}
function covertToHash(asString, level) {
return asString
.split(OPTION_SEPARATOR)
.reduce(function (accumulator, directive) {
var parts = directive.split(OPTION_VALUE_SEPARATOR);
var name = parts[0];
var value = parts[1];
var normalizedValue = normalizeValue(value);
if (ALL_KEYWORD_1 == name || ALL_KEYWORD_2 == name) {
accumulator = override(accumulator, defaults(level, normalizedValue));
} else {
accumulator[name] = normalizedValue;
}
return accumulator;
}, {});
}
module.exports = {
OptimizationLevel: OptimizationLevel,
optimizationLevelFrom: optimizationLevelFrom,
};