package pwgenerator

// Defaults.
const (
	DefCount  uint = 1
	DefMaxLen uint = 256
	DefMinLin uint = 1
)

// Hash algorithms. TODO.
const (
	HashNull pwHash = iota
	HashArgon2i
	HashScryptSha256
	HashCryptSha256
	HashCryptSha512
	HashBcrypt
	HashBcryptSha256
	HashPbkdf2Sha1
	HashPbkdf2Sha256
	HashPbkdf2Sha512
)

// Pre-defined charsets.
var (
	// upper contains the characters from 0x41 to 0x5a ([A-Z]).
	upper CharSet = CharSet{
		'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
		'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
	}
	// lower contains the characters from 0x61 to 0x7a ([a-z]).
	lower CharSet = CharSet{
		'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
		'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
	}
	// alpha contains upper and lower.
	alpha CharSet = append(upper, lower...)
	// numeric contains the characters from 0x30 to 0x39 ([0-9]).
	numeric CharSet = CharSet{
		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
	}
	// alphaNumeric combines alpha and numeric. This is, by far, the most widely-supported charset.
	alphaNumeric CharSet = append(alpha, numeric...)
	/*
		symbols contains the characters from:
			0x21 to 0x2f
			0x3a to 0x40
			0x5b to 0x60
			0x7b to 0x7e
	*/
	symbols CharSet = CharSet{
		// 0x21 to 0x2f
		'!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/',
		// 	0x3a to 0x40
		':', ';', '<', '=', '>', '?', '@',
		//	0x5b to 0x60
		'[', '\\', ']', '^', '_', '`',
		//	0x7b to 0x7e
		'{', '|', '}', '~',
	}
	// safeAscii can be expected to support strong passwords while also be reasonably supported JUST about in every application.
	safeAscii CharSet = append(alphaNumeric, symbols...)
	/*
		extendedSymbols contains the characters from 0x80 to 0xff, excluding:
			0x81, 0x8d, 0x8f, 0x90, 0x9d, 0xa0, 0xad
		as they have no defined ASCII mapping.
	*/
	extendedSymbols CharSet = CharSet{
		'€', '‚', 'ƒ', '„', '…', '†', '‡', 'ˆ', '‰', 'Š', '‹', 'Œ',
		'Ž', '‘', '’', '“', '”', '•', '–', '—', '˜', '™', 'š', '›',
		'œ', 'ž', 'Ÿ', '¡', '¢', '£', '¤', '¥', '¦', '§', '¨', '©',
		'ª', '«', '¬', '®', '¯', '°', '±', '²', '³', '´', 'µ', '¶',
		'·', '¸', '¹', 'º', '»', '¼', '½', '¾', '¿', 'À', 'Á', 'Â',
		'Ã', 'Ä', 'Å', 'Æ', 'Ç', 'È', 'É', 'Ê', 'Ë', 'Ì', 'Í', 'Î',
		'Ï', 'Ð', 'Ñ', 'Ò', 'Ó', 'Ô', 'Õ', 'Ö', '×', 'Ø', 'Ù', 'Ú',
		'Û', 'Ü', 'Ý', 'Þ', 'ß', 'à', 'á', 'â', 'ã', 'ä', 'å', 'æ',
		'ç', 'è', 'é', 'ê', 'ë', 'ì', 'í', 'î', 'ï', 'ð', 'ñ', 'ò',
		'ó', 'ô', 'õ', 'ö', '÷', 'ø', 'ù', 'ú', 'û', 'ü', 'ý', 'þ',
	}
	// allSymbols contains all printable non-alphanumerics.
	allSymbols CharSet = append(symbols, extendedSymbols...)
)

var (
	/*
		AmbiguousChars are visually-ambiguous characters that may be hard to visually differentiate
		depending on the font (especially in monospace fonts).

		To be specifically clear, each character is provided with its ASCII hex value.
		If you need the decimal/octal/etc. reference instead, you can cross-reference
		it via https://square-r00t.net/ascii.html.
	*/
	// TODO: finish this; left off at 0xaa.
	AmbiguousChars []Char = []Char{
		'`',  // 0x60
		'\'', // 0x27
		'‘',  // 0x91
		'’',  // 0x92
		'"',  // 0x22
		'“',  // 0x93
		'”',  // 0x94
		'¨',  // 0xa8
		'*',  // 0x2a
		'•',  // 0x95
		',',  // 0x2c
		'.',  // 0x2e
		'‚',  // 0x82
		'…',  // 0x85
		'!',  // 0x21
		'¡',  // 0xa1
		'1',  // 0x31
		'I',  // 0x49
		'l',  // 0x6c
		'|',  // 0x7c
		'¦',  // 0xa6
		'c',  // 0x63
		'¢',  // 0xa2
		'0',  // 0x30
		'O',  // 0x4f
		'o',  // 0x6f
		'$',  // 0x24
		'S',  // 0x53
		's',  // 0x73
		'Š',  // 0x8a
		'š',  // 0x9a
		'§',  // 0xa7
		'-',  // 0x2d
		'_',  // 0x5f
		'–',  // 0x96
		'—',  // 0x97
		'~',  // 0x7e
		'˜',  // 0x98
		'^',  // 0x5e
		'ˆ',  // 0x88
		'%',  // 0x25
		'‰',  // 0x89
		'<',  // 0x3c
		'‹',  // 0x8b
		'>',  // 0x3e
		'›',  // 0x9b
		'Y',  // 0x59
		'Ÿ',  // 0x9f
		'¥',  // 0xa5
		'Z',  // 0x5a
		'z',  // 0x7a
		'Ž',  // 0x8e
		'ž',  // 0x9e
		'(',  // 0x28
		'[',  // 0x5b
		'{',  // 0x7b
		')',  // 0x29
		']',  // 0x5d
		'}',  // 0x7d
	}
)