const convert = require( 'color-convert' );
const fs = require( 'fs' );
const path = require( 'path' );

/**
 * Recursively find all files with extension in a directory
 * @param {string} dir The directory to search. Either absolute or relative path
 * @param {string} extension The file extension to look for
 * @returns {string[]} returns a list of html files with their full path
 */
const treeWalker = ( dir, extension, ignoreList ) => {
    const ls = fs.readdirSync( dir );
    const fileList = [];
    for ( let file in ls ) {
        if ( fs.statSync( path.join( dir, ls[ file ] ) ).isDirectory() ) {
            // Filter ignored directories
            if ( ignoreList === undefined || !ignoreList.includes( ls[ file ] ) ) {
                const newFiles = treeWalker( path.join( dir, ls[ file ] ), extension, ignoreList );
                for (let file = 0; file < newFiles.length; file++) {
                    fileList.push( newFiles[ file ] );
                }
            }
        } else if ( extension == '*' || ls[ file ].includes( extension ) ) {
            if ( ignoreList === undefined || !ignoreList.includes( ls[ file ] ) ) {
                fileList.push( path.join( dir, ls[ file ] ) );
            }
        }
    }

    return fileList;
}

const renderColourAsHex = ( colour ) => {
    return '#' + convert.default.rgb.hex( colour[ 0 ], colour[ 1 ], colour[ 2 ] );
}

const renderColourAsRGB = ( colour ) => {
    return `rgb( ${ colour[ 0 ] }, ${ colour[ 1 ] }, ${ colour[ 2 ] } )`
}

module.exports = {
    treeWalker,
    renderColourAsHex,
    renderColourAsRGB
}