import path from 'path';
const IS_NATIVE_WIN32_PATH = /^[a-z]:[/\\]|^\\\\/i;
const ABSOLUTE_SCHEME = /^[a-z0-9+\-.]+:/i;
function getURLType(source) {
    if (source[0] === '/') {
        if (source[1] === '/') {
            return 'scheme-relative';
        }
        return 'path-absolute';
    }
    if (IS_NATIVE_WIN32_PATH.test(source)) {
        return 'path-absolute';
    }
    return ABSOLUTE_SCHEME.test(source) ? 'absolute' : 'path-relative';
}
function normalizeSourceMap(map, resourceContext) {
    let newMap = map;
    // Some loader emit source map as string
    // Strip any JSON XSSI avoidance prefix from the string (as documented in the source maps specification), and then parse the string as JSON.
    if (typeof newMap === 'string') {
        newMap = JSON.parse(newMap);
    }
    delete newMap.file;
    const { sourceRoot } = newMap;
    delete newMap.sourceRoot;
    if (newMap.sources) {
        newMap.sources = newMap.sources.map((source)=>{
            const sourceType = getURLType(source);
            // Do no touch `scheme-relative` and `absolute` URLs
            if (sourceType === 'path-relative' || sourceType === 'path-absolute') {
                const absoluteSource = sourceType === 'path-relative' && sourceRoot ? path.resolve(sourceRoot, path.normalize(source)) : path.normalize(source);
                return path.relative(resourceContext, absoluteSource);
            }
            return source;
        });
    }
    return newMap;
}
function normalizeSourceMapAfterPostcss(map, resourceContext) {
    const newMap = map;
    // result.map.file is an optional property that provides the output filename.
    // Since we don't know the final filename in the webpack build chain yet, it makes no sense to have it.
    delete newMap.file;
    newMap.sourceRoot = '';
    newMap.sources = newMap.sources.map((source)=>{
        if (source.startsWith('<')) {
            return source;
        }
        const sourceType = getURLType(source);
        // Do no touch `scheme-relative`, `path-absolute` and `absolute` types
        if (sourceType === 'path-relative') {
            return path.resolve(resourceContext, source);
        }
        return source;
    });
    return newMap;
}
export { normalizeSourceMap, normalizeSourceMapAfterPostcss };

//# sourceMappingURL=utils.js.map