use crate::error::Error;
use std::str::FromStr;

#[allow(non_camel_case_types)]
#[derive(Copy, Clone)]
pub(crate) enum CharSet {
    armscii8,
    ascii,
    big5,
    binary,
    cp1250,
    cp1251,
    cp1256,
    cp1257,
    cp850,
    cp852,
    cp866,
    cp932,
    dec8,
    eucjpms,
    euckr,
    gb18030,
    gb2312,
    gbk,
    geostd8,
    greek,
    hebrew,
    hp8,
    keybcs2,
    koi8r,
    koi8u,
    latin1,
    latin2,
    latin5,
    latin7,
    macce,
    macroman,
    sjis,
    swe7,
    tis620,
    ucs2,
    ujis,
    utf16,
    utf16le,
    utf32,
    utf8,
    utf8mb4,
}

impl CharSet {
    pub(crate) fn as_str(&self) -> &'static str {
        match self {
            CharSet::armscii8 => "armscii8",
            CharSet::ascii => "ascii",
            CharSet::big5 => "big5",
            CharSet::binary => "binary",
            CharSet::cp1250 => "cp1250",
            CharSet::cp1251 => "cp1251",
            CharSet::cp1256 => "cp1256",
            CharSet::cp1257 => "cp1257",
            CharSet::cp850 => "cp850",
            CharSet::cp852 => "cp852",
            CharSet::cp866 => "cp866",
            CharSet::cp932 => "cp932",
            CharSet::dec8 => "dec8",
            CharSet::eucjpms => "eucjpms",
            CharSet::euckr => "euckr",
            CharSet::gb18030 => "gb18030",
            CharSet::gb2312 => "gb2312",
            CharSet::gbk => "gbk",
            CharSet::geostd8 => "geostd8",
            CharSet::greek => "greek",
            CharSet::hebrew => "hebrew",
            CharSet::hp8 => "hp8",
            CharSet::keybcs2 => "keybcs2",
            CharSet::koi8r => "koi8r",
            CharSet::koi8u => "koi8u",
            CharSet::latin1 => "latin1",
            CharSet::latin2 => "latin2",
            CharSet::latin5 => "latin5",
            CharSet::latin7 => "latin7",
            CharSet::macce => "macce",
            CharSet::macroman => "macroman",
            CharSet::sjis => "sjis",
            CharSet::swe7 => "swe7",
            CharSet::tis620 => "tis620",
            CharSet::ucs2 => "ucs2",
            CharSet::ujis => "ujis",
            CharSet::utf16 => "utf16",
            CharSet::utf16le => "utf16le",
            CharSet::utf32 => "utf32",
            CharSet::utf8 => "utf8",
            CharSet::utf8mb4 => "utf8mb4",
        }
    }

    pub(crate) fn default_collation(&self) -> Collation {
        match self {
            CharSet::armscii8 => Collation::armscii8_general_ci,
            CharSet::ascii => Collation::ascii_general_ci,
            CharSet::big5 => Collation::big5_chinese_ci,
            CharSet::binary => Collation::binary,
            CharSet::cp1250 => Collation::cp1250_general_ci,
            CharSet::cp1251 => Collation::cp1251_general_ci,
            CharSet::cp1256 => Collation::cp1256_general_ci,
            CharSet::cp1257 => Collation::cp1257_general_ci,
            CharSet::cp850 => Collation::cp850_general_ci,
            CharSet::cp852 => Collation::cp852_general_ci,
            CharSet::cp866 => Collation::cp866_general_ci,
            CharSet::cp932 => Collation::cp932_japanese_ci,
            CharSet::dec8 => Collation::dec8_swedish_ci,
            CharSet::eucjpms => Collation::eucjpms_japanese_ci,
            CharSet::euckr => Collation::euckr_korean_ci,
            CharSet::gb18030 => Collation::gb18030_chinese_ci,
            CharSet::gb2312 => Collation::gb2312_chinese_ci,
            CharSet::gbk => Collation::gbk_chinese_ci,
            CharSet::geostd8 => Collation::geostd8_general_ci,
            CharSet::greek => Collation::greek_general_ci,
            CharSet::hebrew => Collation::hebrew_general_ci,
            CharSet::hp8 => Collation::hp8_english_ci,
            CharSet::keybcs2 => Collation::keybcs2_general_ci,
            CharSet::koi8r => Collation::koi8r_general_ci,
            CharSet::koi8u => Collation::koi8u_general_ci,
            CharSet::latin1 => Collation::latin1_swedish_ci,
            CharSet::latin2 => Collation::latin2_general_ci,
            CharSet::latin5 => Collation::latin5_turkish_ci,
            CharSet::latin7 => Collation::latin7_general_ci,
            CharSet::macce => Collation::macce_general_ci,
            CharSet::macroman => Collation::macroman_general_ci,
            CharSet::sjis => Collation::sjis_japanese_ci,
            CharSet::swe7 => Collation::swe7_swedish_ci,
            CharSet::tis620 => Collation::tis620_thai_ci,
            CharSet::ucs2 => Collation::ucs2_general_ci,
            CharSet::ujis => Collation::ujis_japanese_ci,
            CharSet::utf16 => Collation::utf16_general_ci,
            CharSet::utf16le => Collation::utf16le_general_ci,
            CharSet::utf32 => Collation::utf32_general_ci,
            CharSet::utf8 => Collation::utf8_unicode_ci,
            CharSet::utf8mb4 => Collation::utf8mb4_unicode_ci,
        }
    }
}

impl FromStr for CharSet {
    type Err = Error;

    fn from_str(char_set: &str) -> Result<Self, Self::Err> {
        Ok(match char_set {
            "armscii8" => CharSet::armscii8,
            "ascii" => CharSet::ascii,
            "big5" => CharSet::big5,
            "binary" => CharSet::binary,
            "cp1250" => CharSet::cp1250,
            "cp1251" => CharSet::cp1251,
            "cp1256" => CharSet::cp1256,
            "cp1257" => CharSet::cp1257,
            "cp850" => CharSet::cp850,
            "cp852" => CharSet::cp852,
            "cp866" => CharSet::cp866,
            "cp932" => CharSet::cp932,
            "dec8" => CharSet::dec8,
            "eucjpms" => CharSet::eucjpms,
            "euckr" => CharSet::euckr,
            "gb18030" => CharSet::gb18030,
            "gb2312" => CharSet::gb2312,
            "gbk" => CharSet::gbk,
            "geostd8" => CharSet::geostd8,
            "greek" => CharSet::greek,
            "hebrew" => CharSet::hebrew,
            "hp8" => CharSet::hp8,
            "keybcs2" => CharSet::keybcs2,
            "koi8r" => CharSet::koi8r,
            "koi8u" => CharSet::koi8u,
            "latin1" => CharSet::latin1,
            "latin2" => CharSet::latin2,
            "latin5" => CharSet::latin5,
            "latin7" => CharSet::latin7,
            "macce" => CharSet::macce,
            "macroman" => CharSet::macroman,
            "sjis" => CharSet::sjis,
            "swe7" => CharSet::swe7,
            "tis620" => CharSet::tis620,
            "ucs2" => CharSet::ucs2,
            "ujis" => CharSet::ujis,
            "utf16" => CharSet::utf16,
            "utf16le" => CharSet::utf16le,
            "utf32" => CharSet::utf32,
            "utf8" => CharSet::utf8,
            "utf8mb4" => CharSet::utf8mb4,

            _ => {
                return Err(Error::Configuration(
                    format!("unsupported MySQL charset: {}", char_set).into(),
                ));
            }
        })
    }
}

#[derive(Copy, Clone)]
#[allow(non_camel_case_types)]
#[repr(u8)]
pub(crate) enum Collation {
    armscii8_bin = 64,
    armscii8_general_ci = 32,
    ascii_bin = 65,
    ascii_general_ci = 11,
    big5_bin = 84,
    big5_chinese_ci = 1,
    binary = 63,
    cp1250_bin = 66,
    cp1250_croatian_ci = 44,
    cp1250_czech_cs = 34,
    cp1250_general_ci = 26,
    cp1250_polish_ci = 99,
    cp1251_bin = 50,
    cp1251_bulgarian_ci = 14,
    cp1251_general_ci = 51,
    cp1251_general_cs = 52,
    cp1251_ukrainian_ci = 23,
    cp1256_bin = 67,
    cp1256_general_ci = 57,
    cp1257_bin = 58,
    cp1257_general_ci = 59,
    cp1257_lithuanian_ci = 29,
    cp850_bin = 80,
    cp850_general_ci = 4,
    cp852_bin = 81,
    cp852_general_ci = 40,
    cp866_bin = 68,
    cp866_general_ci = 36,
    cp932_bin = 96,
    cp932_japanese_ci = 95,
    dec8_bin = 69,
    dec8_swedish_ci = 3,
    eucjpms_bin = 98,
    eucjpms_japanese_ci = 97,
    euckr_bin = 85,
    euckr_korean_ci = 19,
    gb18030_bin = 249,
    gb18030_chinese_ci = 248,
    gb18030_unicode_520_ci = 250,
    gb2312_bin = 86,
    gb2312_chinese_ci = 24,
    gbk_bin = 87,
    gbk_chinese_ci = 28,
    geostd8_bin = 93,
    geostd8_general_ci = 92,
    greek_bin = 70,
    greek_general_ci = 25,
    hebrew_bin = 71,
    hebrew_general_ci = 16,
    hp8_bin = 72,
    hp8_english_ci = 6,
    keybcs2_bin = 73,
    keybcs2_general_ci = 37,
    koi8r_bin = 74,
    koi8r_general_ci = 7,
    koi8u_bin = 75,
    koi8u_general_ci = 22,
    latin1_bin = 47,
    latin1_danish_ci = 15,
    latin1_general_ci = 48,
    latin1_general_cs = 49,
    latin1_german1_ci = 5,
    latin1_german2_ci = 31,
    latin1_spanish_ci = 94,
    latin1_swedish_ci = 8,
    latin2_bin = 77,
    latin2_croatian_ci = 27,
    latin2_czech_cs = 2,
    latin2_general_ci = 9,
    latin2_hungarian_ci = 21,
    latin5_bin = 78,
    latin5_turkish_ci = 30,
    latin7_bin = 79,
    latin7_estonian_cs = 20,
    latin7_general_ci = 41,
    latin7_general_cs = 42,
    macce_bin = 43,
    macce_general_ci = 38,
    macroman_bin = 53,
    macroman_general_ci = 39,
    sjis_bin = 88,
    sjis_japanese_ci = 13,
    swe7_bin = 82,
    swe7_swedish_ci = 10,
    tis620_bin = 89,
    tis620_thai_ci = 18,
    ucs2_bin = 90,
    ucs2_croatian_ci = 149,
    ucs2_czech_ci = 138,
    ucs2_danish_ci = 139,
    ucs2_esperanto_ci = 145,
    ucs2_estonian_ci = 134,
    ucs2_general_ci = 35,
    ucs2_general_mysql500_ci = 159,
    ucs2_german2_ci = 148,
    ucs2_hungarian_ci = 146,
    ucs2_icelandic_ci = 129,
    ucs2_latvian_ci = 130,
    ucs2_lithuanian_ci = 140,
    ucs2_persian_ci = 144,
    ucs2_polish_ci = 133,
    ucs2_roman_ci = 143,
    ucs2_romanian_ci = 131,
    ucs2_sinhala_ci = 147,
    ucs2_slovak_ci = 141,
    ucs2_slovenian_ci = 132,
    ucs2_spanish_ci = 135,
    ucs2_spanish2_ci = 142,
    ucs2_swedish_ci = 136,
    ucs2_turkish_ci = 137,
    ucs2_unicode_520_ci = 150,
    ucs2_unicode_ci = 128,
    ucs2_vietnamese_ci = 151,
    ujis_bin = 91,
    ujis_japanese_ci = 12,
    utf16_bin = 55,
    utf16_croatian_ci = 122,
    utf16_czech_ci = 111,
    utf16_danish_ci = 112,
    utf16_esperanto_ci = 118,
    utf16_estonian_ci = 107,
    utf16_general_ci = 54,
    utf16_german2_ci = 121,
    utf16_hungarian_ci = 119,
    utf16_icelandic_ci = 102,
    utf16_latvian_ci = 103,
    utf16_lithuanian_ci = 113,
    utf16_persian_ci = 117,
    utf16_polish_ci = 106,
    utf16_roman_ci = 116,
    utf16_romanian_ci = 104,
    utf16_sinhala_ci = 120,
    utf16_slovak_ci = 114,
    utf16_slovenian_ci = 105,
    utf16_spanish_ci = 108,
    utf16_spanish2_ci = 115,
    utf16_swedish_ci = 109,
    utf16_turkish_ci = 110,
    utf16_unicode_520_ci = 123,
    utf16_unicode_ci = 101,
    utf16_vietnamese_ci = 124,
    utf16le_bin = 62,
    utf16le_general_ci = 56,
    utf32_bin = 61,
    utf32_croatian_ci = 181,
    utf32_czech_ci = 170,
    utf32_danish_ci = 171,
    utf32_esperanto_ci = 177,
    utf32_estonian_ci = 166,
    utf32_general_ci = 60,
    utf32_german2_ci = 180,
    utf32_hungarian_ci = 178,
    utf32_icelandic_ci = 161,
    utf32_latvian_ci = 162,
    utf32_lithuanian_ci = 172,
    utf32_persian_ci = 176,
    utf32_polish_ci = 165,
    utf32_roman_ci = 175,
    utf32_romanian_ci = 163,
    utf32_sinhala_ci = 179,
    utf32_slovak_ci = 173,
    utf32_slovenian_ci = 164,
    utf32_spanish_ci = 167,
    utf32_spanish2_ci = 174,
    utf32_swedish_ci = 168,
    utf32_turkish_ci = 169,
    utf32_unicode_520_ci = 182,
    utf32_unicode_ci = 160,
    utf32_vietnamese_ci = 183,
    utf8_bin = 83,
    utf8_croatian_ci = 213,
    utf8_czech_ci = 202,
    utf8_danish_ci = 203,
    utf8_esperanto_ci = 209,
    utf8_estonian_ci = 198,
    utf8_general_ci = 33,
    utf8_general_mysql500_ci = 223,
    utf8_german2_ci = 212,
    utf8_hungarian_ci = 210,
    utf8_icelandic_ci = 193,
    utf8_latvian_ci = 194,
    utf8_lithuanian_ci = 204,
    utf8_persian_ci = 208,
    utf8_polish_ci = 197,
    utf8_roman_ci = 207,
    utf8_romanian_ci = 195,
    utf8_sinhala_ci = 211,
    utf8_slovak_ci = 205,
    utf8_slovenian_ci = 196,
    utf8_spanish_ci = 199,
    utf8_spanish2_ci = 206,
    utf8_swedish_ci = 200,
    utf8_tolower_ci = 76,
    utf8_turkish_ci = 201,
    utf8_unicode_520_ci = 214,
    utf8_unicode_ci = 192,
    utf8_vietnamese_ci = 215,
    utf8mb4_0900_ai_ci = 255,
    utf8mb4_bin = 46,
    utf8mb4_croatian_ci = 245,
    utf8mb4_czech_ci = 234,
    utf8mb4_danish_ci = 235,
    utf8mb4_esperanto_ci = 241,
    utf8mb4_estonian_ci = 230,
    utf8mb4_general_ci = 45,
    utf8mb4_german2_ci = 244,
    utf8mb4_hungarian_ci = 242,
    utf8mb4_icelandic_ci = 225,
    utf8mb4_latvian_ci = 226,
    utf8mb4_lithuanian_ci = 236,
    utf8mb4_persian_ci = 240,
    utf8mb4_polish_ci = 229,
    utf8mb4_roman_ci = 239,
    utf8mb4_romanian_ci = 227,
    utf8mb4_sinhala_ci = 243,
    utf8mb4_slovak_ci = 237,
    utf8mb4_slovenian_ci = 228,
    utf8mb4_spanish_ci = 231,
    utf8mb4_spanish2_ci = 238,
    utf8mb4_swedish_ci = 232,
    utf8mb4_turkish_ci = 233,
    utf8mb4_unicode_520_ci = 246,
    utf8mb4_unicode_ci = 224,
    utf8mb4_vietnamese_ci = 247,
}

impl Collation {
    pub(crate) fn as_str(&self) -> &'static str {
        match self {
            Collation::armscii8_bin => "armscii8_bin",
            Collation::armscii8_general_ci => "armscii8_general_ci",
            Collation::ascii_bin => "ascii_bin",
            Collation::ascii_general_ci => "ascii_general_ci",
            Collation::big5_bin => "big5_bin",
            Collation::big5_chinese_ci => "big5_chinese_ci",
            Collation::binary => "binary",
            Collation::cp1250_bin => "cp1250_bin",
            Collation::cp1250_croatian_ci => "cp1250_croatian_ci",
            Collation::cp1250_czech_cs => "cp1250_czech_cs",
            Collation::cp1250_general_ci => "cp1250_general_ci",
            Collation::cp1250_polish_ci => "cp1250_polish_ci",
            Collation::cp1251_bin => "cp1251_bin",
            Collation::cp1251_bulgarian_ci => "cp1251_bulgarian_ci",
            Collation::cp1251_general_ci => "cp1251_general_ci",
            Collation::cp1251_general_cs => "cp1251_general_cs",
            Collation::cp1251_ukrainian_ci => "cp1251_ukrainian_ci",
            Collation::cp1256_bin => "cp1256_bin",
            Collation::cp1256_general_ci => "cp1256_general_ci",
            Collation::cp1257_bin => "cp1257_bin",
            Collation::cp1257_general_ci => "cp1257_general_ci",
            Collation::cp1257_lithuanian_ci => "cp1257_lithuanian_ci",
            Collation::cp850_bin => "cp850_bin",
            Collation::cp850_general_ci => "cp850_general_ci",
            Collation::cp852_bin => "cp852_bin",
            Collation::cp852_general_ci => "cp852_general_ci",
            Collation::cp866_bin => "cp866_bin",
            Collation::cp866_general_ci => "cp866_general_ci",
            Collation::cp932_bin => "cp932_bin",
            Collation::cp932_japanese_ci => "cp932_japanese_ci",
            Collation::dec8_bin => "dec8_bin",
            Collation::dec8_swedish_ci => "dec8_swedish_ci",
            Collation::eucjpms_bin => "eucjpms_bin",
            Collation::eucjpms_japanese_ci => "eucjpms_japanese_ci",
            Collation::euckr_bin => "euckr_bin",
            Collation::euckr_korean_ci => "euckr_korean_ci",
            Collation::gb18030_bin => "gb18030_bin",
            Collation::gb18030_chinese_ci => "gb18030_chinese_ci",
            Collation::gb18030_unicode_520_ci => "gb18030_unicode_520_ci",
            Collation::gb2312_bin => "gb2312_bin",
            Collation::gb2312_chinese_ci => "gb2312_chinese_ci",
            Collation::gbk_bin => "gbk_bin",
            Collation::gbk_chinese_ci => "gbk_chinese_ci",
            Collation::geostd8_bin => "geostd8_bin",
            Collation::geostd8_general_ci => "geostd8_general_ci",
            Collation::greek_bin => "greek_bin",
            Collation::greek_general_ci => "greek_general_ci",
            Collation::hebrew_bin => "hebrew_bin",
            Collation::hebrew_general_ci => "hebrew_general_ci",
            Collation::hp8_bin => "hp8_bin",
            Collation::hp8_english_ci => "hp8_english_ci",
            Collation::keybcs2_bin => "keybcs2_bin",
            Collation::keybcs2_general_ci => "keybcs2_general_ci",
            Collation::koi8r_bin => "koi8r_bin",
            Collation::koi8r_general_ci => "koi8r_general_ci",
            Collation::koi8u_bin => "koi8u_bin",
            Collation::koi8u_general_ci => "koi8u_general_ci",
            Collation::latin1_bin => "latin1_bin",
            Collation::latin1_danish_ci => "latin1_danish_ci",
            Collation::latin1_general_ci => "latin1_general_ci",
            Collation::latin1_general_cs => "latin1_general_cs",
            Collation::latin1_german1_ci => "latin1_german1_ci",
            Collation::latin1_german2_ci => "latin1_german2_ci",
            Collation::latin1_spanish_ci => "latin1_spanish_ci",
            Collation::latin1_swedish_ci => "latin1_swedish_ci",
            Collation::latin2_bin => "latin2_bin",
            Collation::latin2_croatian_ci => "latin2_croatian_ci",
            Collation::latin2_czech_cs => "latin2_czech_cs",
            Collation::latin2_general_ci => "latin2_general_ci",
            Collation::latin2_hungarian_ci => "latin2_hungarian_ci",
            Collation::latin5_bin => "latin5_bin",
            Collation::latin5_turkish_ci => "latin5_turkish_ci",
            Collation::latin7_bin => "latin7_bin",
            Collation::latin7_estonian_cs => "latin7_estonian_cs",
            Collation::latin7_general_ci => "latin7_general_ci",
            Collation::latin7_general_cs => "latin7_general_cs",
            Collation::macce_bin => "macce_bin",
            Collation::macce_general_ci => "macce_general_ci",
            Collation::macroman_bin => "macroman_bin",
            Collation::macroman_general_ci => "macroman_general_ci",
            Collation::sjis_bin => "sjis_bin",
            Collation::sjis_japanese_ci => "sjis_japanese_ci",
            Collation::swe7_bin => "swe7_bin",
            Collation::swe7_swedish_ci => "swe7_swedish_ci",
            Collation::tis620_bin => "tis620_bin",
            Collation::tis620_thai_ci => "tis620_thai_ci",
            Collation::ucs2_bin => "ucs2_bin",
            Collation::ucs2_croatian_ci => "ucs2_croatian_ci",
            Collation::ucs2_czech_ci => "ucs2_czech_ci",
            Collation::ucs2_danish_ci => "ucs2_danish_ci",
            Collation::ucs2_esperanto_ci => "ucs2_esperanto_ci",
            Collation::ucs2_estonian_ci => "ucs2_estonian_ci",
            Collation::ucs2_general_ci => "ucs2_general_ci",
            Collation::ucs2_general_mysql500_ci => "ucs2_general_mysql500_ci",
            Collation::ucs2_german2_ci => "ucs2_german2_ci",
            Collation::ucs2_hungarian_ci => "ucs2_hungarian_ci",
            Collation::ucs2_icelandic_ci => "ucs2_icelandic_ci",
            Collation::ucs2_latvian_ci => "ucs2_latvian_ci",
            Collation::ucs2_lithuanian_ci => "ucs2_lithuanian_ci",
            Collation::ucs2_persian_ci => "ucs2_persian_ci",
            Collation::ucs2_polish_ci => "ucs2_polish_ci",
            Collation::ucs2_roman_ci => "ucs2_roman_ci",
            Collation::ucs2_romanian_ci => "ucs2_romanian_ci",
            Collation::ucs2_sinhala_ci => "ucs2_sinhala_ci",
            Collation::ucs2_slovak_ci => "ucs2_slovak_ci",
            Collation::ucs2_slovenian_ci => "ucs2_slovenian_ci",
            Collation::ucs2_spanish_ci => "ucs2_spanish_ci",
            Collation::ucs2_spanish2_ci => "ucs2_spanish2_ci",
            Collation::ucs2_swedish_ci => "ucs2_swedish_ci",
            Collation::ucs2_turkish_ci => "ucs2_turkish_ci",
            Collation::ucs2_unicode_520_ci => "ucs2_unicode_520_ci",
            Collation::ucs2_unicode_ci => "ucs2_unicode_ci",
            Collation::ucs2_vietnamese_ci => "ucs2_vietnamese_ci",
            Collation::ujis_bin => "ujis_bin",
            Collation::ujis_japanese_ci => "ujis_japanese_ci",
            Collation::utf16_bin => "utf16_bin",
            Collation::utf16_croatian_ci => "utf16_croatian_ci",
            Collation::utf16_czech_ci => "utf16_czech_ci",
            Collation::utf16_danish_ci => "utf16_danish_ci",
            Collation::utf16_esperanto_ci => "utf16_esperanto_ci",
            Collation::utf16_estonian_ci => "utf16_estonian_ci",
            Collation::utf16_general_ci => "utf16_general_ci",
            Collation::utf16_german2_ci => "utf16_german2_ci",
            Collation::utf16_hungarian_ci => "utf16_hungarian_ci",
            Collation::utf16_icelandic_ci => "utf16_icelandic_ci",
            Collation::utf16_latvian_ci => "utf16_latvian_ci",
            Collation::utf16_lithuanian_ci => "utf16_lithuanian_ci",
            Collation::utf16_persian_ci => "utf16_persian_ci",
            Collation::utf16_polish_ci => "utf16_polish_ci",
            Collation::utf16_roman_ci => "utf16_roman_ci",
            Collation::utf16_romanian_ci => "utf16_romanian_ci",
            Collation::utf16_sinhala_ci => "utf16_sinhala_ci",
            Collation::utf16_slovak_ci => "utf16_slovak_ci",
            Collation::utf16_slovenian_ci => "utf16_slovenian_ci",
            Collation::utf16_spanish_ci => "utf16_spanish_ci",
            Collation::utf16_spanish2_ci => "utf16_spanish2_ci",
            Collation::utf16_swedish_ci => "utf16_swedish_ci",
            Collation::utf16_turkish_ci => "utf16_turkish_ci",
            Collation::utf16_unicode_520_ci => "utf16_unicode_520_ci",
            Collation::utf16_unicode_ci => "utf16_unicode_ci",
            Collation::utf16_vietnamese_ci => "utf16_vietnamese_ci",
            Collation::utf16le_bin => "utf16le_bin",
            Collation::utf16le_general_ci => "utf16le_general_ci",
            Collation::utf32_bin => "utf32_bin",
            Collation::utf32_croatian_ci => "utf32_croatian_ci",
            Collation::utf32_czech_ci => "utf32_czech_ci",
            Collation::utf32_danish_ci => "utf32_danish_ci",
            Collation::utf32_esperanto_ci => "utf32_esperanto_ci",
            Collation::utf32_estonian_ci => "utf32_estonian_ci",
            Collation::utf32_general_ci => "utf32_general_ci",
            Collation::utf32_german2_ci => "utf32_german2_ci",
            Collation::utf32_hungarian_ci => "utf32_hungarian_ci",
            Collation::utf32_icelandic_ci => "utf32_icelandic_ci",
            Collation::utf32_latvian_ci => "utf32_latvian_ci",
            Collation::utf32_lithuanian_ci => "utf32_lithuanian_ci",
            Collation::utf32_persian_ci => "utf32_persian_ci",
            Collation::utf32_polish_ci => "utf32_polish_ci",
            Collation::utf32_roman_ci => "utf32_roman_ci",
            Collation::utf32_romanian_ci => "utf32_romanian_ci",
            Collation::utf32_sinhala_ci => "utf32_sinhala_ci",
            Collation::utf32_slovak_ci => "utf32_slovak_ci",
            Collation::utf32_slovenian_ci => "utf32_slovenian_ci",
            Collation::utf32_spanish_ci => "utf32_spanish_ci",
            Collation::utf32_spanish2_ci => "utf32_spanish2_ci",
            Collation::utf32_swedish_ci => "utf32_swedish_ci",
            Collation::utf32_turkish_ci => "utf32_turkish_ci",
            Collation::utf32_unicode_520_ci => "utf32_unicode_520_ci",
            Collation::utf32_unicode_ci => "utf32_unicode_ci",
            Collation::utf32_vietnamese_ci => "utf32_vietnamese_ci",
            Collation::utf8_bin => "utf8_bin",
            Collation::utf8_croatian_ci => "utf8_croatian_ci",
            Collation::utf8_czech_ci => "utf8_czech_ci",
            Collation::utf8_danish_ci => "utf8_danish_ci",
            Collation::utf8_esperanto_ci => "utf8_esperanto_ci",
            Collation::utf8_estonian_ci => "utf8_estonian_ci",
            Collation::utf8_general_ci => "utf8_general_ci",
            Collation::utf8_general_mysql500_ci => "utf8_general_mysql500_ci",
            Collation::utf8_german2_ci => "utf8_german2_ci",
            Collation::utf8_hungarian_ci => "utf8_hungarian_ci",
            Collation::utf8_icelandic_ci => "utf8_icelandic_ci",
            Collation::utf8_latvian_ci => "utf8_latvian_ci",
            Collation::utf8_lithuanian_ci => "utf8_lithuanian_ci",
            Collation::utf8_persian_ci => "utf8_persian_ci",
            Collation::utf8_polish_ci => "utf8_polish_ci",
            Collation::utf8_roman_ci => "utf8_roman_ci",
            Collation::utf8_romanian_ci => "utf8_romanian_ci",
            Collation::utf8_sinhala_ci => "utf8_sinhala_ci",
            Collation::utf8_slovak_ci => "utf8_slovak_ci",
            Collation::utf8_slovenian_ci => "utf8_slovenian_ci",
            Collation::utf8_spanish_ci => "utf8_spanish_ci",
            Collation::utf8_spanish2_ci => "utf8_spanish2_ci",
            Collation::utf8_swedish_ci => "utf8_swedish_ci",
            Collation::utf8_tolower_ci => "utf8_tolower_ci",
            Collation::utf8_turkish_ci => "utf8_turkish_ci",
            Collation::utf8_unicode_520_ci => "utf8_unicode_520_ci",
            Collation::utf8_unicode_ci => "utf8_unicode_ci",
            Collation::utf8_vietnamese_ci => "utf8_vietnamese_ci",
            Collation::utf8mb4_0900_ai_ci => "utf8mb4_0900_ai_ci",
            Collation::utf8mb4_bin => "utf8mb4_bin",
            Collation::utf8mb4_croatian_ci => "utf8mb4_croatian_ci",
            Collation::utf8mb4_czech_ci => "utf8mb4_czech_ci",
            Collation::utf8mb4_danish_ci => "utf8mb4_danish_ci",
            Collation::utf8mb4_esperanto_ci => "utf8mb4_esperanto_ci",
            Collation::utf8mb4_estonian_ci => "utf8mb4_estonian_ci",
            Collation::utf8mb4_general_ci => "utf8mb4_general_ci",
            Collation::utf8mb4_german2_ci => "utf8mb4_german2_ci",
            Collation::utf8mb4_hungarian_ci => "utf8mb4_hungarian_ci",
            Collation::utf8mb4_icelandic_ci => "utf8mb4_icelandic_ci",
            Collation::utf8mb4_latvian_ci => "utf8mb4_latvian_ci",
            Collation::utf8mb4_lithuanian_ci => "utf8mb4_lithuanian_ci",
            Collation::utf8mb4_persian_ci => "utf8mb4_persian_ci",
            Collation::utf8mb4_polish_ci => "utf8mb4_polish_ci",
            Collation::utf8mb4_roman_ci => "utf8mb4_roman_ci",
            Collation::utf8mb4_romanian_ci => "utf8mb4_romanian_ci",
            Collation::utf8mb4_sinhala_ci => "utf8mb4_sinhala_ci",
            Collation::utf8mb4_slovak_ci => "utf8mb4_slovak_ci",
            Collation::utf8mb4_slovenian_ci => "utf8mb4_slovenian_ci",
            Collation::utf8mb4_spanish_ci => "utf8mb4_spanish_ci",
            Collation::utf8mb4_spanish2_ci => "utf8mb4_spanish2_ci",
            Collation::utf8mb4_swedish_ci => "utf8mb4_swedish_ci",
            Collation::utf8mb4_turkish_ci => "utf8mb4_turkish_ci",
            Collation::utf8mb4_unicode_520_ci => "utf8mb4_unicode_520_ci",
            Collation::utf8mb4_unicode_ci => "utf8mb4_unicode_ci",
            Collation::utf8mb4_vietnamese_ci => "utf8mb4_vietnamese_ci",
        }
    }
}

// Handshake packet have only 1 byte for collation_id.
// So we can't use collations with ID > 255.
impl FromStr for Collation {
    type Err = Error;

    fn from_str(collation: &str) -> Result<Self, Self::Err> {
        Ok(match collation {
            "big5_chinese_ci" => Collation::big5_chinese_ci,
            "swe7_swedish_ci" => Collation::swe7_swedish_ci,
            "utf16_unicode_ci" => Collation::utf16_unicode_ci,
            "utf16_icelandic_ci" => Collation::utf16_icelandic_ci,
            "utf16_latvian_ci" => Collation::utf16_latvian_ci,
            "utf16_romanian_ci" => Collation::utf16_romanian_ci,
            "utf16_slovenian_ci" => Collation::utf16_slovenian_ci,
            "utf16_polish_ci" => Collation::utf16_polish_ci,
            "utf16_estonian_ci" => Collation::utf16_estonian_ci,
            "utf16_spanish_ci" => Collation::utf16_spanish_ci,
            "utf16_swedish_ci" => Collation::utf16_swedish_ci,
            "ascii_general_ci" => Collation::ascii_general_ci,
            "utf16_turkish_ci" => Collation::utf16_turkish_ci,
            "utf16_czech_ci" => Collation::utf16_czech_ci,
            "utf16_danish_ci" => Collation::utf16_danish_ci,
            "utf16_lithuanian_ci" => Collation::utf16_lithuanian_ci,
            "utf16_slovak_ci" => Collation::utf16_slovak_ci,
            "utf16_spanish2_ci" => Collation::utf16_spanish2_ci,
            "utf16_roman_ci" => Collation::utf16_roman_ci,
            "utf16_persian_ci" => Collation::utf16_persian_ci,
            "utf16_esperanto_ci" => Collation::utf16_esperanto_ci,
            "utf16_hungarian_ci" => Collation::utf16_hungarian_ci,
            "ujis_japanese_ci" => Collation::ujis_japanese_ci,
            "utf16_sinhala_ci" => Collation::utf16_sinhala_ci,
            "utf16_german2_ci" => Collation::utf16_german2_ci,
            "utf16_croatian_ci" => Collation::utf16_croatian_ci,
            "utf16_unicode_520_ci" => Collation::utf16_unicode_520_ci,
            "utf16_vietnamese_ci" => Collation::utf16_vietnamese_ci,
            "ucs2_unicode_ci" => Collation::ucs2_unicode_ci,
            "ucs2_icelandic_ci" => Collation::ucs2_icelandic_ci,
            "sjis_japanese_ci" => Collation::sjis_japanese_ci,
            "ucs2_latvian_ci" => Collation::ucs2_latvian_ci,
            "ucs2_romanian_ci" => Collation::ucs2_romanian_ci,
            "ucs2_slovenian_ci" => Collation::ucs2_slovenian_ci,
            "ucs2_polish_ci" => Collation::ucs2_polish_ci,
            "ucs2_estonian_ci" => Collation::ucs2_estonian_ci,
            "ucs2_spanish_ci" => Collation::ucs2_spanish_ci,
            "ucs2_swedish_ci" => Collation::ucs2_swedish_ci,
            "ucs2_turkish_ci" => Collation::ucs2_turkish_ci,
            "ucs2_czech_ci" => Collation::ucs2_czech_ci,
            "ucs2_danish_ci" => Collation::ucs2_danish_ci,
            "cp1251_bulgarian_ci" => Collation::cp1251_bulgarian_ci,
            "ucs2_lithuanian_ci" => Collation::ucs2_lithuanian_ci,
            "ucs2_slovak_ci" => Collation::ucs2_slovak_ci,
            "ucs2_spanish2_ci" => Collation::ucs2_spanish2_ci,
            "ucs2_roman_ci" => Collation::ucs2_roman_ci,
            "ucs2_persian_ci" => Collation::ucs2_persian_ci,
            "ucs2_esperanto_ci" => Collation::ucs2_esperanto_ci,
            "ucs2_hungarian_ci" => Collation::ucs2_hungarian_ci,
            "ucs2_sinhala_ci" => Collation::ucs2_sinhala_ci,
            "ucs2_german2_ci" => Collation::ucs2_german2_ci,
            "ucs2_croatian_ci" => Collation::ucs2_croatian_ci,
            "latin1_danish_ci" => Collation::latin1_danish_ci,
            "ucs2_unicode_520_ci" => Collation::ucs2_unicode_520_ci,
            "ucs2_vietnamese_ci" => Collation::ucs2_vietnamese_ci,
            "ucs2_general_mysql500_ci" => Collation::ucs2_general_mysql500_ci,
            "hebrew_general_ci" => Collation::hebrew_general_ci,
            "utf32_unicode_ci" => Collation::utf32_unicode_ci,
            "utf32_icelandic_ci" => Collation::utf32_icelandic_ci,
            "utf32_latvian_ci" => Collation::utf32_latvian_ci,
            "utf32_romanian_ci" => Collation::utf32_romanian_ci,
            "utf32_slovenian_ci" => Collation::utf32_slovenian_ci,
            "utf32_polish_ci" => Collation::utf32_polish_ci,
            "utf32_estonian_ci" => Collation::utf32_estonian_ci,
            "utf32_spanish_ci" => Collation::utf32_spanish_ci,
            "utf32_swedish_ci" => Collation::utf32_swedish_ci,
            "utf32_turkish_ci" => Collation::utf32_turkish_ci,
            "utf32_czech_ci" => Collation::utf32_czech_ci,
            "utf32_danish_ci" => Collation::utf32_danish_ci,
            "utf32_lithuanian_ci" => Collation::utf32_lithuanian_ci,
            "utf32_slovak_ci" => Collation::utf32_slovak_ci,
            "utf32_spanish2_ci" => Collation::utf32_spanish2_ci,
            "utf32_roman_ci" => Collation::utf32_roman_ci,
            "utf32_persian_ci" => Collation::utf32_persian_ci,
            "utf32_esperanto_ci" => Collation::utf32_esperanto_ci,
            "utf32_hungarian_ci" => Collation::utf32_hungarian_ci,
            "utf32_sinhala_ci" => Collation::utf32_sinhala_ci,
            "tis620_thai_ci" => Collation::tis620_thai_ci,
            "utf32_german2_ci" => Collation::utf32_german2_ci,
            "utf32_croatian_ci" => Collation::utf32_croatian_ci,
            "utf32_unicode_520_ci" => Collation::utf32_unicode_520_ci,
            "utf32_vietnamese_ci" => Collation::utf32_vietnamese_ci,
            "euckr_korean_ci" => Collation::euckr_korean_ci,
            "utf8_unicode_ci" => Collation::utf8_unicode_ci,
            "utf8_icelandic_ci" => Collation::utf8_icelandic_ci,
            "utf8_latvian_ci" => Collation::utf8_latvian_ci,
            "utf8_romanian_ci" => Collation::utf8_romanian_ci,
            "utf8_slovenian_ci" => Collation::utf8_slovenian_ci,
            "utf8_polish_ci" => Collation::utf8_polish_ci,
            "utf8_estonian_ci" => Collation::utf8_estonian_ci,
            "utf8_spanish_ci" => Collation::utf8_spanish_ci,
            "latin2_czech_cs" => Collation::latin2_czech_cs,
            "latin7_estonian_cs" => Collation::latin7_estonian_cs,
            "utf8_swedish_ci" => Collation::utf8_swedish_ci,
            "utf8_turkish_ci" => Collation::utf8_turkish_ci,
            "utf8_czech_ci" => Collation::utf8_czech_ci,
            "utf8_danish_ci" => Collation::utf8_danish_ci,
            "utf8_lithuanian_ci" => Collation::utf8_lithuanian_ci,
            "utf8_slovak_ci" => Collation::utf8_slovak_ci,
            "utf8_spanish2_ci" => Collation::utf8_spanish2_ci,
            "utf8_roman_ci" => Collation::utf8_roman_ci,
            "utf8_persian_ci" => Collation::utf8_persian_ci,
            "utf8_esperanto_ci" => Collation::utf8_esperanto_ci,
            "latin2_hungarian_ci" => Collation::latin2_hungarian_ci,
            "utf8_hungarian_ci" => Collation::utf8_hungarian_ci,
            "utf8_sinhala_ci" => Collation::utf8_sinhala_ci,
            "utf8_german2_ci" => Collation::utf8_german2_ci,
            "utf8_croatian_ci" => Collation::utf8_croatian_ci,
            "utf8_unicode_520_ci" => Collation::utf8_unicode_520_ci,
            "utf8_vietnamese_ci" => Collation::utf8_vietnamese_ci,
            "koi8u_general_ci" => Collation::koi8u_general_ci,
            "utf8_general_mysql500_ci" => Collation::utf8_general_mysql500_ci,
            "utf8mb4_unicode_ci" => Collation::utf8mb4_unicode_ci,
            "utf8mb4_icelandic_ci" => Collation::utf8mb4_icelandic_ci,
            "utf8mb4_latvian_ci" => Collation::utf8mb4_latvian_ci,
            "utf8mb4_romanian_ci" => Collation::utf8mb4_romanian_ci,
            "utf8mb4_slovenian_ci" => Collation::utf8mb4_slovenian_ci,
            "utf8mb4_polish_ci" => Collation::utf8mb4_polish_ci,
            "cp1251_ukrainian_ci" => Collation::cp1251_ukrainian_ci,
            "utf8mb4_estonian_ci" => Collation::utf8mb4_estonian_ci,
            "utf8mb4_spanish_ci" => Collation::utf8mb4_spanish_ci,
            "utf8mb4_swedish_ci" => Collation::utf8mb4_swedish_ci,
            "utf8mb4_turkish_ci" => Collation::utf8mb4_turkish_ci,
            "utf8mb4_czech_ci" => Collation::utf8mb4_czech_ci,
            "utf8mb4_danish_ci" => Collation::utf8mb4_danish_ci,
            "utf8mb4_lithuanian_ci" => Collation::utf8mb4_lithuanian_ci,
            "utf8mb4_slovak_ci" => Collation::utf8mb4_slovak_ci,
            "utf8mb4_spanish2_ci" => Collation::utf8mb4_spanish2_ci,
            "utf8mb4_roman_ci" => Collation::utf8mb4_roman_ci,
            "gb2312_chinese_ci" => Collation::gb2312_chinese_ci,
            "utf8mb4_persian_ci" => Collation::utf8mb4_persian_ci,
            "utf8mb4_esperanto_ci" => Collation::utf8mb4_esperanto_ci,
            "utf8mb4_hungarian_ci" => Collation::utf8mb4_hungarian_ci,
            "utf8mb4_sinhala_ci" => Collation::utf8mb4_sinhala_ci,
            "utf8mb4_german2_ci" => Collation::utf8mb4_german2_ci,
            "utf8mb4_croatian_ci" => Collation::utf8mb4_croatian_ci,
            "utf8mb4_unicode_520_ci" => Collation::utf8mb4_unicode_520_ci,
            "utf8mb4_vietnamese_ci" => Collation::utf8mb4_vietnamese_ci,
            "gb18030_chinese_ci" => Collation::gb18030_chinese_ci,
            "gb18030_bin" => Collation::gb18030_bin,
            "greek_general_ci" => Collation::greek_general_ci,
            "gb18030_unicode_520_ci" => Collation::gb18030_unicode_520_ci,
            "utf8mb4_0900_ai_ci" => Collation::utf8mb4_0900_ai_ci,
            "cp1250_general_ci" => Collation::cp1250_general_ci,
            "latin2_croatian_ci" => Collation::latin2_croatian_ci,
            "gbk_chinese_ci" => Collation::gbk_chinese_ci,
            "cp1257_lithuanian_ci" => Collation::cp1257_lithuanian_ci,
            "dec8_swedish_ci" => Collation::dec8_swedish_ci,
            "latin5_turkish_ci" => Collation::latin5_turkish_ci,
            "latin1_german2_ci" => Collation::latin1_german2_ci,
            "armscii8_general_ci" => Collation::armscii8_general_ci,
            "utf8_general_ci" => Collation::utf8_general_ci,
            "cp1250_czech_cs" => Collation::cp1250_czech_cs,
            "ucs2_general_ci" => Collation::ucs2_general_ci,
            "cp866_general_ci" => Collation::cp866_general_ci,
            "keybcs2_general_ci" => Collation::keybcs2_general_ci,
            "macce_general_ci" => Collation::macce_general_ci,
            "macroman_general_ci" => Collation::macroman_general_ci,
            "cp850_general_ci" => Collation::cp850_general_ci,
            "cp852_general_ci" => Collation::cp852_general_ci,
            "latin7_general_ci" => Collation::latin7_general_ci,
            "latin7_general_cs" => Collation::latin7_general_cs,
            "macce_bin" => Collation::macce_bin,
            "cp1250_croatian_ci" => Collation::cp1250_croatian_ci,
            "utf8mb4_general_ci" => Collation::utf8mb4_general_ci,
            "utf8mb4_bin" => Collation::utf8mb4_bin,
            "latin1_bin" => Collation::latin1_bin,
            "latin1_general_ci" => Collation::latin1_general_ci,
            "latin1_general_cs" => Collation::latin1_general_cs,
            "latin1_german1_ci" => Collation::latin1_german1_ci,
            "cp1251_bin" => Collation::cp1251_bin,
            "cp1251_general_ci" => Collation::cp1251_general_ci,
            "cp1251_general_cs" => Collation::cp1251_general_cs,
            "macroman_bin" => Collation::macroman_bin,
            "utf16_general_ci" => Collation::utf16_general_ci,
            "utf16_bin" => Collation::utf16_bin,
            "utf16le_general_ci" => Collation::utf16le_general_ci,
            "cp1256_general_ci" => Collation::cp1256_general_ci,
            "cp1257_bin" => Collation::cp1257_bin,
            "cp1257_general_ci" => Collation::cp1257_general_ci,
            "hp8_english_ci" => Collation::hp8_english_ci,
            "utf32_general_ci" => Collation::utf32_general_ci,
            "utf32_bin" => Collation::utf32_bin,
            "utf16le_bin" => Collation::utf16le_bin,
            "binary" => Collation::binary,
            "armscii8_bin" => Collation::armscii8_bin,
            "ascii_bin" => Collation::ascii_bin,
            "cp1250_bin" => Collation::cp1250_bin,
            "cp1256_bin" => Collation::cp1256_bin,
            "cp866_bin" => Collation::cp866_bin,
            "dec8_bin" => Collation::dec8_bin,
            "koi8r_general_ci" => Collation::koi8r_general_ci,
            "greek_bin" => Collation::greek_bin,
            "hebrew_bin" => Collation::hebrew_bin,
            "hp8_bin" => Collation::hp8_bin,
            "keybcs2_bin" => Collation::keybcs2_bin,
            "koi8r_bin" => Collation::koi8r_bin,
            "koi8u_bin" => Collation::koi8u_bin,
            "utf8_tolower_ci" => Collation::utf8_tolower_ci,
            "latin2_bin" => Collation::latin2_bin,
            "latin5_bin" => Collation::latin5_bin,
            "latin7_bin" => Collation::latin7_bin,
            "latin1_swedish_ci" => Collation::latin1_swedish_ci,
            "cp850_bin" => Collation::cp850_bin,
            "cp852_bin" => Collation::cp852_bin,
            "swe7_bin" => Collation::swe7_bin,
            "utf8_bin" => Collation::utf8_bin,
            "big5_bin" => Collation::big5_bin,
            "euckr_bin" => Collation::euckr_bin,
            "gb2312_bin" => Collation::gb2312_bin,
            "gbk_bin" => Collation::gbk_bin,
            "sjis_bin" => Collation::sjis_bin,
            "tis620_bin" => Collation::tis620_bin,
            "latin2_general_ci" => Collation::latin2_general_ci,
            "ucs2_bin" => Collation::ucs2_bin,
            "ujis_bin" => Collation::ujis_bin,
            "geostd8_general_ci" => Collation::geostd8_general_ci,
            "geostd8_bin" => Collation::geostd8_bin,
            "latin1_spanish_ci" => Collation::latin1_spanish_ci,
            "cp932_japanese_ci" => Collation::cp932_japanese_ci,
            "cp932_bin" => Collation::cp932_bin,
            "eucjpms_japanese_ci" => Collation::eucjpms_japanese_ci,
            "eucjpms_bin" => Collation::eucjpms_bin,
            "cp1250_polish_ci" => Collation::cp1250_polish_ci,

            _ => {
                return Err(Error::Configuration(
                    format!("unsupported MySQL collation: {}", collation).into(),
                ));
            }
        })
    }
}