'use strict';

function utf8ToBinaryString(str) {
	var escstr = encodeURIComponent(str);
	// replaces any uri escape sequence, such as %0A,
	// with binary escape, such as 0x0A
	var binstr = escstr.replace(/%([0-9A-F]{2})/g, function(match, p1) {
		return String.fromCharCode(parseInt(p1, 16));
	});

	return binstr;
}

function utf8ToBuffer(str) {
	var binstr = utf8ToBinaryString(str);
	var buf = binaryStringToBuffer(binstr);
	return buf;
}

function utf8ToBase64(str) {
	var binstr = utf8ToBinaryString(str);
	return btoa(binstr);
}

function binaryStringToUtf8(binstr) {
	var escstr = binstr.replace(/(.)/g, function(m, p) {
		var code = p
			.charCodeAt(0)
			.toString(16)
			.toUpperCase();
		if (code.length < 2) {
			code = '0' + code;
		}
		return '%' + code;
	});

	return decodeURIComponent(escstr);
}

function bufferToUtf8(buf) {
	var binstr = bufferToBinaryString(buf);

	return binaryStringToUtf8(binstr);
}

function base64ToUtf8(b64) {
	var binstr = atob(b64);

	return binaryStringToUtf8(binstr);
}

function bufferToBinaryString(buf) {
	var binstr = Array.prototype.map
		.call(buf, function(ch) {
			return String.fromCharCode(ch);
		})
		.join('');

	return binstr;
}

function bufferToBase64(arr) {
	var binstr = bufferToBinaryString(arr);
	return btoa(binstr);
}

function binaryStringToBuffer(binstr) {
	var buf;

	if ('undefined' !== typeof Uint8Array) {
		buf = new Uint8Array(binstr.length);
	} else {
		buf = [];
	}

	Array.prototype.forEach.call(binstr, function(ch, i) {
		buf[i] = ch.charCodeAt(0);
	});

	return buf;
}

function base64ToBuffer(base64) {
	var binstr = atob(base64);
	var buf = binaryStringToBuffer(binstr);
	return buf;
}

module.exports = {
	utf8ToBinaryString: utf8ToBinaryString,
	utf8ToBuffer: utf8ToBuffer,
	utf8ToBase64: utf8ToBase64,
	binaryStringToUtf8: binaryStringToUtf8,
	bufferToUtf8: bufferToUtf8,
	base64ToUtf8: base64ToUtf8,
	bufferToBinaryString: bufferToBinaryString,
	bufferToBase64: bufferToBase64,
	binaryStringToBuffer: binaryStringToBuffer,
	base64ToBuffer: base64ToBuffer
};

/** WEBPACK **/
module.exports.bufferToHex = function(buf) {
	return require('./hex.js').bufferToHex(buf);
};
module.exports.hexToBuffer = function(hex) {
	return require('./hex.js').hexToBuffer(hex);
};
module.exports.bufferToBase32 = function(buf) {
	return require('./base32.js').bufferToBase32(buf);
};
module.exports.base32ToBuffer = function(b32) {
	return require('./base32.js').base32ToBuffer(b32);
};
/** END WEBPACK **/