use ahash::{HashMap, HashSet};
use core::ops::RangeInclusive;
use encoding::all::encodings;
use once_cell::sync::Lazy;
use regex::Regex;

pub static TOO_BIG_SEQUENCE: usize = 1_000_000; // 10E6
pub(crate) static MAX_PROCESSED_BYTES: usize = 500_000;
pub(crate) static TOO_SMALL_SEQUENCE: usize = 32;
pub(crate) static UTF8_MAXIMAL_ALLOCATION: usize = 1_112_064;
pub(crate) static COMMON_SAFE_ASCII_CHARACTERS: &'static str = "<>=:/&;{}[],|\"-";

// Contain for each eligible encoding a list of/item bytes SIG/BOM
pub(crate) static ENCODING_MARKS: Lazy<HashMap<&'static str, &'static [u8]>> = Lazy::new(|| {
    HashMap::from_iter([
        ("utf-8", b"\xef\xbb\xbf".as_slice()),
        ("gb18030", b"\x84\x31\x95\x33".as_slice()),
        ("utf-16le", b"\xff\xfe".as_slice()),
        ("utf-16be", b"\xfe\xff".as_slice()),
    ])
});

pub(crate) static UNICODE_RANGES_COMBINED: Lazy<[(&'static str, RangeInclusive<u32>); 279]> =
    Lazy::new(|| {
        [
            ("Control character", 0..=31),
            ("Basic Latin", 32..=127),
            ("Latin-1 Supplement", 128..=255),
            ("Latin Extended-A", 256..=383),
            ("Latin Extended-B", 384..=591),
            ("IPA Extensions", 592..=687),
            ("Spacing Modifier Letters", 688..=767),
            ("Combining Diacritical Marks", 768..=879),
            ("Greek and Coptic", 880..=1023),
            ("Cyrillic", 1024..=1279),
            ("Cyrillic Supplement", 1280..=1327),
            ("Armenian", 1328..=1423),
            ("Hebrew", 1424..=1535),
            ("Arabic", 1536..=1791),
            ("Syriac", 1792..=1871),
            ("Arabic Supplement", 1872..=1919),
            ("Thaana", 1920..=1983),
            ("NKo", 1984..=2047),
            ("Samaritan", 2048..=2111),
            ("Mandaic", 2112..=2143),
            ("Syriac Supplement", 2144..=2159),
            ("Arabic Extended-A", 2208..=2303),
            ("Devanagari", 2304..=2431),
            ("Bengali", 2432..=2559),
            ("Gurmukhi", 2560..=2687),
            ("Gujarati", 2688..=2815),
            ("Oriya", 2816..=2943),
            ("Tamil", 2944..=3071),
            ("Telugu", 3072..=3199),
            ("Kannada", 3200..=3327),
            ("Malayalam", 3328..=3455),
            ("Sinhala", 3456..=3583),
            ("Thai", 3584..=3711),
            ("Lao", 3712..=3839),
            ("Tibetan", 3840..=4095),
            ("Myanmar", 4096..=4255),
            ("Georgian", 4256..=4351),
            ("Hangul Jamo", 4352..=4607),
            ("Ethiopic", 4608..=4991),
            ("Ethiopic Supplement", 4992..=5023),
            ("Cherokee", 5024..=5119),
            ("Unified Canadian Aboriginal Syllabics", 5120..=5759),
            ("Ogham", 5760..=5791),
            ("Runic", 5792..=5887),
            ("Tagalog", 5888..=5919),
            ("Hanunoo", 5920..=5951),
            ("Buhid", 5952..=5983),
            ("Tagbanwa", 5984..=6015),
            ("Khmer", 6016..=6143),
            ("Mongolian", 6144..=6319),
            (
                "Unified Canadian Aboriginal Syllabics Extended",
                6320..=6399,
            ),
            ("Limbu", 6400..=6479),
            ("Tai Le", 6480..=6527),
            ("New Tai Lue", 6528..=6623),
            ("Khmer Symbols", 6624..=6655),
            ("Buginese", 6656..=6687),
            ("Tai Tham", 6688..=6831),
            ("Combining Diacritical Marks Extended", 6832..=6911),
            ("Balinese", 6912..=7039),
            ("Sundanese", 7040..=7103),
            ("Batak", 7104..=7167),
            ("Lepcha", 7168..=7247),
            ("Ol Chiki", 7248..=7295),
            ("Cyrillic Extended C", 7296..=7311),
            ("Sundanese Supplement", 7360..=7375),
            ("Vedic Extensions", 7376..=7423),
            ("Phonetic Extensions", 7424..=7551),
            ("Phonetic Extensions Supplement", 7552..=7615),
            ("Combining Diacritical Marks Supplement", 7616..=7679),
            ("Latin Extended Additional", 7680..=7935),
            ("Greek Extended", 7936..=8191),
            ("General Punctuation", 8192..=8303),
            ("Superscripts and Subscripts", 8304..=8351),
            ("Currency Symbols", 8352..=8399),
            ("Combining Diacritical Marks for Symbols", 8400..=8447),
            ("Letterlike Symbols", 8448..=8527),
            ("Number Forms", 8528..=8591),
            ("Arrows", 8592..=8703),
            ("Mathematical Operators", 8704..=8959),
            ("Miscellaneous Technical", 8960..=9215),
            ("Control Pictures", 9216..=9279),
            ("Optical Character Recognition", 9280..=9311),
            ("Enclosed Alphanumerics", 9312..=9471),
            ("Box Drawing", 9472..=9599),
            ("Block Elements", 9600..=9631),
            ("Geometric Shapes", 9632..=9727),
            ("Miscellaneous Symbols", 9728..=9983),
            ("Dingbats", 9984..=10175),
            ("Miscellaneous Mathematical Symbols-A", 10176..=10223),
            ("Supplemental Arrows-A", 10224..=10239),
            ("Braille Patterns", 10240..=10495),
            ("Supplemental Arrows-B", 10496..=10623),
            ("Miscellaneous Mathematical Symbols-B", 10624..=10751),
            ("Supplemental Mathematical Operators", 10752..=11007),
            ("Miscellaneous Symbols and Arrows", 11008..=11263),
            ("Glagolitic", 11264..=11359),
            ("Latin Extended-C", 11360..=11391),
            ("Coptic", 11392..=11519),
            ("Georgian Supplement", 11520..=11567),
            ("Tifinagh", 11568..=11647),
            ("Ethiopic Extended", 11648..=11743),
            ("Cyrillic Extended-A", 11744..=11775),
            ("Supplemental Punctuation", 11776..=11903),
            ("CJK Radicals Supplement", 11904..=12031),
            ("Kangxi Radicals", 12032..=12255),
            ("Ideographic Description Characters", 12272..=12287),
            ("CJK Symbols and Punctuation", 12288..=12351),
            ("Hiragana", 12352..=12447),
            ("Katakana", 12448..=12543),
            ("Bopomofo", 12544..=12591),
            ("Hangul Compatibility Jamo", 12592..=12687),
            ("Kanbun", 12688..=12703),
            ("Bopomofo Extended", 12704..=12735),
            ("CJK Strokes", 12736..=12783),
            ("Katakana Phonetic Extensions", 12784..=12799),
            ("Enclosed CJK Letters and Months", 12800..=13055),
            ("CJK Compatibility", 13056..=13311),
            ("CJK Unified Ideographs Extension A", 13312..=19903),
            ("Yijing Hexagram Symbols", 19904..=19967),
            ("CJK Unified Ideographs", 19968..=40959),
            ("Yi Syllables", 40960..=42127),
            ("Yi Radicals", 42128..=42191),
            ("Lisu", 42192..=42239),
            ("Vai", 42240..=42559),
            ("Cyrillic Extended-B", 42560..=42655),
            ("Bamum", 42656..=42751),
            ("Modifier Tone Letters", 42752..=42783),
            ("Latin Extended-D", 42784..=43007),
            ("Syloti Nagri", 43008..=43055),
            ("Common Indic Number Forms", 43056..=43071),
            ("Phags-pa", 43072..=43135),
            ("Saurashtra", 43136..=43231),
            ("Devanagari Extended", 43232..=43263),
            ("Kayah Li", 43264..=43311),
            ("Rejang", 43312..=43359),
            ("Hangul Jamo Extended-A", 43360..=43391),
            ("Javanese", 43392..=43487),
            ("Myanmar Extended-B", 43488..=43519),
            ("Cham", 43520..=43615),
            ("Myanmar Extended-A", 43616..=43647),
            ("Tai Viet", 43648..=43743),
            ("Meetei Mayek Extensions", 43744..=43775),
            ("Ethiopic Extended-A", 43776..=43823),
            ("Latin Extended-E", 43824..=43887),
            ("Cherokee Supplement", 43888..=43967),
            ("Meetei Mayek", 43968..=44031),
            ("Hangul Syllables", 44032..=55215),
            ("Hangul Jamo Extended-B", 55216..=55295),
            ("High Surrogates", 55296..=56191),
            ("High Private Use Surrogates", 56192..=56319),
            ("Low Surrogates", 56320..=57343),
            ("Private Use Area", 57344..=63743),
            ("CJK Compatibility Ideographs", 63744..=64255),
            ("Alphabetic Presentation Forms", 64256..=64335),
            ("Arabic Presentation Forms-A", 64336..=65023),
            ("Variation Selectors", 65024..=65039),
            ("Vertical Forms", 65040..=65055),
            ("Combining Half Marks", 65056..=65071),
            ("CJK Compatibility Forms", 65072..=65103),
            ("Small Form Variants", 65104..=65135),
            ("Arabic Presentation Forms-B", 65136..=65279),
            ("Halfwidth and Fullwidth Forms", 65280..=65519),
            ("Specials", 65520..=65535),
            ("Linear B Syllabary", 65536..=65663),
            ("Linear B Ideograms", 65664..=65791),
            ("Aegean Numbers", 65792..=65855),
            ("Ancient Greek Numbers", 65856..=65935),
            ("Ancient Symbols", 65936..=65999),
            ("Phaistos Disc", 66000..=66047),
            ("Lycian", 66176..=66207),
            ("Carian", 66208..=66271),
            ("Coptic Epact Numbers", 66272..=66303),
            ("Old Italic", 66304..=66351),
            ("Gothic", 66352..=66383),
            ("Old Permic", 66384..=66431),
            ("Ugaritic", 66432..=66463),
            ("Old Persian", 66464..=66527),
            ("Deseret", 66560..=66639),
            ("Shavian", 66640..=66687),
            ("Osmanya", 66688..=66735),
            ("Osage", 66736..=66815),
            ("Elbasan", 66816..=66863),
            ("Caucasian Albanian", 66864..=66927),
            ("Linear A", 67072..=67455),
            ("Cypriot Syllabary", 67584..=67647),
            ("Imperial Aramaic", 67648..=67679),
            ("Palmyrene", 67680..=67711),
            ("Nabataean", 67712..=67759),
            ("Hatran", 67808..=67839),
            ("Phoenician", 67840..=67871),
            ("Lydian", 67872..=67903),
            ("Meroitic Hieroglyphs", 67968..=67999),
            ("Meroitic Cursive", 68000..=68095),
            ("Kharoshthi", 68096..=68191),
            ("Old South Arabian", 68192..=68223),
            ("Old North Arabian", 68224..=68255),
            ("Manichaean", 68288..=68351),
            ("Avestan", 68352..=68415),
            ("Inscriptional Parthian", 68416..=68447),
            ("Inscriptional Pahlavi", 68448..=68479),
            ("Psalter Pahlavi", 68480..=68527),
            ("Old Turkic", 68608..=68687),
            ("Old Hungarian", 68736..=68863),
            ("Rumi Numeral Symbols", 69216..=69247),
            ("Brahmi", 69632..=69759),
            ("Kaithi", 69760..=69839),
            ("Sora Sompeng", 69840..=69887),
            ("Chakma", 69888..=69967),
            ("Mahajani", 69968..=70015),
            ("Sharada", 70016..=70111),
            ("Sinhala Archaic Numbers", 70112..=70143),
            ("Khojki", 70144..=70223),
            ("Multani", 70272..=70319),
            ("Khudawadi", 70320..=70399),
            ("Grantha", 70400..=70527),
            ("Newa", 70656..=70783),
            ("Tirhuta", 70784..=70879),
            ("Siddham", 71040..=71167),
            ("Modi", 71168..=71263),
            ("Mongolian Supplement", 71264..=71295),
            ("Takri", 71296..=71375),
            ("Ahom", 71424..=71487),
            ("Warang Citi", 71840..=71935),
            ("Zanabazar Square", 72192..=72271),
            ("Soyombo", 72272..=72367),
            ("Pau Cin Hau", 72384..=72447),
            ("Bhaiksuki", 72704..=72815),
            ("Marchen", 72816..=72895),
            ("Masaram Gondi", 72960..=73055),
            ("Cuneiform", 73728..=74751),
            ("Cuneiform Numbers and Punctuation", 74752..=74879),
            ("Early Dynastic Cuneiform", 74880..=75087),
            ("Egyptian Hieroglyphs", 77824..=78895),
            ("Anatolian Hieroglyphs", 82944..=83583),
            ("Bamum Supplement", 92160..=92735),
            ("Mro", 92736..=92783),
            ("Bassa Vah", 92880..=92927),
            ("Pahawh Hmong", 92928..=93071),
            ("Miao", 93952..=94111),
            ("Ideographic Symbols and Punctuation", 94176..=94207),
            ("Tangut", 94208..=100_351),
            ("Tangut Components", 100_352..=101_119),
            ("Kana Supplement", 110_592..=110_847),
            ("Kana Extended-A", 110_848..=110_895),
            ("Nushu", 110_960..=111_359),
            ("Duployan", 113_664..=113_823),
            ("Shorthand Format Controls", 113_824..=113_839),
            ("Byzantine Musical Symbols", 118_784..=119_039),
            ("Musical Symbols", 119_040..=119_295),
            ("Ancient Greek Musical Notation", 119_296..=119_375),
            ("Tai Xuan Jing Symbols", 119_552..=119_647),
            ("Counting Rod Numerals", 119_648..=119_679),
            ("Mathematical Alphanumeric Symbols", 119_808..=120_831),
            ("Sutton SignWriting", 120_832..=121_519),
            ("Glagolitic Supplement", 122_880..=122_927),
            ("Mende Kikakui", 124_928..=125_151),
            ("Adlam", 125_184..=125_279),
            ("Arabic Mathematical Alphabetic Symbols", 126_464..=126_719),
            ("Mahjong Tiles", 126_976..=127_023),
            ("Domino Tiles", 127_024..=127_135),
            ("Playing Cards", 127_136..=127_231),
            ("Enclosed Alphanumeric Supplement", 127_232..=127_487),
            ("Enclosed Ideographic Supplement", 127_488..=127_743),
            ("Miscellaneous Symbols and Pictographs", 127_744..=128_511),
            ("Emoticons range(Emoji)", 128_512..=128_591),
            ("Ornamental Dingbats", 128_592..=128_639),
            ("Transport and Map Symbols", 128_640..=128_767),
            ("Alchemical Symbols", 128_768..=128_895),
            ("Geometric Shapes Extended", 128_896..=129_023),
            ("Supplemental Arrows-C", 129_024..=129_279),
            ("Supplemental Symbols and Pictographs", 129_280..=129_535),
            ("CJK Unified Ideographs Extension B", 131_072..=173_791),
            ("CJK Unified Ideographs Extension C", 173_824..=177_983),
            ("CJK Unified Ideographs Extension D", 177_984..=178_207),
            ("CJK Unified Ideographs Extension E", 178_208..=183_983),
            ("CJK Unified Ideographs Extension F", 183_984..=191_471),
            ("CJK Compatibility Ideographs Supplement", 194_560..=195_103),
            ("Tags", 917_504..=917_631),
            ("Variation Selectors Supplement", 917_760..=917_999),
        ]
    });

pub(crate) static UNICODE_SECONDARY_RANGE_KEYWORD: Lazy<HashSet<&'static str>> = Lazy::new(|| {
    HashSet::from_iter([
        "Extended",
        "Extensions",
        "Modifier",
        "Marks",
        "Punctuation",
        "Symbols",
        "Forms",
        "Operators",
        "Miscellaneous",
        "Drawing",
        "Block",
        "Shapes",
        "Supplemental",
        "Supplement",
        "Tags",
    ])
});

pub(crate) static RE_POSSIBLE_ENCODING_INDICATION: Lazy<Regex> = Lazy::new(|| {
    Regex::new(
    r#"(?:(?:encoding)|(?:charset)|(?:coding))(?:[\:= ]{1,10})(?:["']?)([a-zA-Z0-9\-_]+)(?:["']?)"#
).unwrap()
});

pub static IANA_SUPPORTED: Lazy<Vec<&'static str>> = Lazy::new(|| {
    encodings()
        .iter()
        .filter(|&enc| !["error", "encoder-only-utf-8", "pua-mapped-binary"].contains(&enc.name()))
        .map(|&enc| enc.whatwg_name().unwrap_or(enc.name()))
        .collect()
});

pub static IANA_SUPPORTED_COUNT: Lazy<usize> = Lazy::new(|| IANA_SUPPORTED.len());

// chardet encoding names (in lowercase!)
pub static CHARDET_CORRESPONDENCE: Lazy<HashMap<&'static str, &'static str>> = Lazy::new(|| {
    HashMap::from_iter([
        ("tis-620", "windows-874"),
        ("utf-16", "utf-16le"),
        ("maccyrillic", "x-mac-cyrillic"),
        ("gb2312", "gbk"),
        ("cp949", "euc-kr"),
    ])
});

// aliases (labels) are from https://encoding.spec.whatwg.org/#concept-encoding-get -> as is + lowercased
pub static IANA_SUPPORTED_ALIASES: Lazy<HashMap<&'static str, Vec<&'static str>>> =
    Lazy::new(|| {
        HashMap::from_iter([
            (
                "utf-8",
                vec![
                    "unicode-1-1-utf-8",
                    "unicode11utf8",
                    "unicode20utf8",
                    "utf-8",
                    "utf8",
                    "x-unicode20utf8",
                ],
            ),
            ("ibm866", vec!["866", "cp866", "csibm866", "ibm866"]),
            (
                "iso-8859-2",
                vec![
                    "csisolatin2",
                    "iso-8859-2",
                    "iso-ir-101",
                    "iso8859-2",
                    "iso88592",
                    "iso_8859-2",
                    "iso_8859-2:1987",
                    "l2",
                    "latin2",
                ],
            ),
            (
                "iso-8859-3",
                vec![
                    "csisolatin3",
                    "iso-8859-3",
                    "iso-ir-109",
                    "iso8859-3",
                    "iso88593",
                    "iso_8859-3",
                    "iso_8859-3:1988",
                    "l3",
                    "latin3",
                ],
            ),
            (
                "iso-8859-4",
                vec![
                    "csisolatin4",
                    "iso-8859-4",
                    "iso-ir-110",
                    "iso8859-4",
                    "iso88594",
                    "iso_8859-4",
                    "iso_8859-4:1988",
                    "l4",
                    "latin4",
                ],
            ),
            (
                "iso-8859-5",
                vec![
                    "csisolatincyrillic",
                    "cyrillic",
                    "iso-8859-5",
                    "iso-ir-144",
                    "iso8859-5",
                    "iso88595",
                    "iso_8859-5",
                    "iso_8859-5:1988",
                ],
            ),
            (
                "iso-8859-6",
                vec![
                    "arabic",
                    "asmo-708",
                    "csiso88596e",
                    "csiso88596i",
                    "csisolatinarabic",
                    "ecma-114",
                    "iso-8859-6",
                    "iso-8859-6-e",
                    "iso-8859-6-i",
                    "iso-ir-127",
                    "iso8859-6",
                    "iso88596",
                    "iso_8859-6",
                    "iso_8859-6:1987",
                ],
            ),
            (
                "iso-8859-7",
                vec![
                    "csisolatingreek",
                    "ecma-118",
                    "elot_928",
                    "greek",
                    "greek8",
                    "iso-8859-7",
                    "iso-ir-126",
                    "iso8859-7",
                    "iso88597",
                    "iso_8859-7",
                    "iso_8859-7:1987",
                    "sun_eu_greek",
                ],
            ),
            (
                "iso-8859-8",
                vec![
                    "csiso88598e",
                    "csisolatinhebrew",
                    "hebrew",
                    "iso-8859-8",
                    "iso-8859-8-e",
                    "iso-ir-138",
                    "iso8859-8",
                    "iso88598",
                    "iso_8859-8",
                    "iso_8859-8:1988",
                    "visual",
                ],
            ),
            (
                "iso-8859-8-i",
                vec!["csiso88598i", "iso-8859-8-i", "logical"],
            ),
            (
                "iso-8859-10",
                vec![
                    "csisolatin6",
                    "iso-8859-10",
                    "iso-ir-157",
                    "iso8859-10",
                    "iso885910",
                    "l6",
                    "latin6",
                ],
            ),
            (
                "iso-8859-13",
                vec!["iso-8859-13", "iso8859-13", "iso885913"],
            ),
            (
                "iso-8859-14",
                vec!["iso-8859-14", "iso8859-14", "iso885914"],
            ),
            (
                "iso-8859-15",
                vec![
                    "csisolatin9",
                    "iso-8859-15",
                    "iso8859-15",
                    "iso885915",
                    "iso_8859-15",
                    "l9",
                ],
            ),
            ("iso-8859-16", vec!["iso-8859-16"]),
            ("koi8-r", vec!["cskoi8r", "koi", "koi8", "koi8-r", "koi8_r"]),
            ("koi8-u", vec!["koi8-ru", "koi8-u"]),
            (
                "macintosh",
                vec!["csmacintosh", "mac", "macintosh", "x-mac-roman"],
            ),
            (
                "windows-874",
                vec![
                    "dos-874",
                    "iso-8859-11",
                    "iso8859-11",
                    "iso885911",
                    "tis-620",
                    "windows-874",
                ],
            ),
            ("windows-1250", vec!["cp1250", "windows-1250", "x-cp1250"]),
            ("windows-1251", vec!["cp1251", "windows-1251", "x-cp1251"]),
            (
                "windows-1252",
                vec![
                    "ansi_x3.4-1968",
                    "ascii",
                    "cp1252",
                    "cp819",
                    "csisolatin1",
                    "ibm819",
                    "iso-8859-1",
                    "iso-ir-100",
                    "iso8859-1",
                    "iso88591",
                    "iso_8859-1",
                    "iso_8859-1:1987",
                    "l1",
                    "latin1",
                    "us-ascii",
                    "windows-1252",
                    "x-cp1252",
                ],
            ),
            ("windows-1253", vec!["cp1253", "windows-1253", "x-cp1253"]),
            (
                "windows-1254",
                vec![
                    "cp1254",
                    "csisolatin5",
                    "iso-8859-9",
                    "iso-ir-148",
                    "iso8859-9",
                    "iso88599",
                    "iso_8859-9",
                    "iso_8859-9:1989",
                    "l5",
                    "latin5",
                    "windows-1254",
                    "x-cp1254",
                ],
            ),
            ("windows-1255", vec!["cp1255", "windows-1255", "x-cp1255"]),
            ("windows-1256", vec!["cp1256", "windows-1256", "x-cp1256"]),
            ("windows-1257", vec!["cp1257", "windows-1257", "x-cp1257"]),
            ("windows-1258", vec!["cp1258", "windows-1258", "x-cp1258"]),
            ("x-mac-cyrillic", vec!["x-mac-cyrillic", "x-mac-ukrainian"]),
            (
                "gbk",
                vec![
                    "chinese",
                    "csgb2312",
                    "csiso58gb231280",
                    "gb2312",
                    "gb_2312",
                    "gb_2312-80",
                    "gbk",
                    "iso-ir-58",
                    "x-gbk",
                ],
            ),
            ("gb18030", vec!["gb18030"]),
            (
                "big5",
                vec!["big5", "big5-hkscs", "cn-big5", "csbig5", "x-x-big5"],
            ),
            ("euc-jp", vec!["cseucpkdfmtjapanese", "euc-jp", "x-euc-jp"]),
            ("iso-2022-jp", vec!["csiso2022jp", "iso-2022-jp"]),
            (
                "shift_jis",
                vec![
                    "csshiftjis",
                    "ms932",
                    "ms_kanji",
                    "shift-jis",
                    "shift_jis",
                    "sjis",
                    "windows-31j",
                    "x-sjis",
                ],
            ),
            (
                "euc-kr",
                vec![
                    "cseuckr",
                    "csksc56011987",
                    "euc-kr",
                    "iso-ir-149",
                    "korean",
                    "ks_c_5601-1987",
                    "ks_c_5601-1989",
                    "ksc5601",
                    "ksc_5601",
                    "windows-949",
                ],
            ),
            (
                "replacement",
                vec![
                    "csiso2022kr",
                    "hz-gb-2312",
                    "iso-2022-cn",
                    "iso-2022-cn-ext",
                    "iso-2022-kr",
                    "replacement",
                ],
            ),
            ("utf-16be", vec!["unicodefffe", "utf-16be"]),
            (
                "utf-16le",
                vec![
                    "csunicode",
                    "iso-10646-ucs-2",
                    "ucs-2",
                    "unicode",
                    "unicodefeff",
                    "utf-16",
                    "utf-16le",
                ],
            ),
            ("x-user-defined", vec!["x-user-defined"]),
        ])
    });

pub static IANA_SUPPORTED_SIMILAR: Lazy<HashMap<&'static str, Vec<&'static str>>> =
    Lazy::new(|| {
        HashMap::from_iter([
            ("windows-1252", vec!["iso-8859-15", "windows-1254"]),
            ("windows-1253", vec!["iso-8859-7"]),
            ("windows-1254", vec!["iso-8859-15", "windows-1252"]),
            ("windows-1257", vec!["iso-8859-13"]),
            (
                "iso-8859-10",
                vec![
                    "iso-8859-14",
                    "iso-8859-15",
                    "iso-8859-4",
                    "windows-1254",
                    "windows-1252",
                ],
            ),
            ("iso-8859-13", vec!["windows-1257"]),
            (
                "iso-8859-14",
                vec![
                    "iso-8859-10",
                    "iso-8859-15",
                    "iso-8859-16",
                    "iso-8859-3",
                    "windows-1254",
                    "windows-1252",
                ],
            ),
            (
                "iso-8859-15",
                vec![
                    "windows-1252",
                    "windows-1254",
                    "iso-8859-10",
                    "iso-8859-14",
                    "iso-8859-16",
                    "iso-8859-3",
                ],
            ),
            (
                "iso-8859-16",
                vec![
                    "iso-8859-14",
                    "iso-8859-15",
                    "iso-8859-2",
                    "iso-8859-3",
                    "windows-1254",
                    "windows-1252",
                ],
            ),
            ("iso-8859-2", vec!["iso-8859-16", "iso-8859-4"]),
            (
                "iso-8859-3",
                vec![
                    "iso-8859-14",
                    "iso-8859-15",
                    "iso-8859-16",
                    "windows-1254",
                    "windows-1252",
                ],
            ),
            (
                "iso-8859-4",
                vec!["iso-8859-10", "iso-8859-2", "windows-1254", "windows-1252"],
            ),
            ("iso-8859-7", vec!["windows-1253"]),
            (
                "windows-1254",
                vec![
                    "windows-1252",
                    "windows-1258",
                    "iso-8859-10",
                    "iso-8859-14",
                    "iso-8859-15",
                    "iso-8859-16",
                    "iso-8859-3",
                    "iso-8859-4",
                ],
            ),
            (
                "windows-1252",
                vec![
                    "windows-1254",
                    "windows-1258",
                    "iso-8859-10",
                    "iso-8859-14",
                    "iso-8859-15",
                    "iso-8859-16",
                    "iso-8859-3",
                    "iso-8859-4",
                ],
            ),
        ])
    });