const MimeTypes = Object.freeze({
    "323": "text/h323",
    "3dmf": "x-world/x-3dmf",
    "3dm": "x-world/x-3dmf",
    "3g2": "video/3gpp2",
    "3gp": "video/3gpp",
    "7z": "application/x-7z-compressed",
    aab: "application/x-authorware-bin",
    aac: "audio/aac",
    aam: "application/x-authorware-map",
    aas: "application/x-authorware-seg",
    abc: "text/vnd.abc",
    acgi: "text/html",
    acx: "application/internet-property-stream",
    afl: "video/animaflex",
    ai: "application/postscript",
    aif: "audio/aiff",
    aifc: "audio/aiff",
    aiff: "audio/aiff",
    aim: "application/x-aim",
    aip: "text/x-audiosoft-intra",
    ani: "application/x-navi-animation",
    aos: "application/x-nokia-9000-communicator-add-on-software",
    appcache: "text/cache-manifest",
    application: "application/x-ms-application",
    aps: "application/mime",
    art: "image/x-jg",
    asf: "video/x-ms-asf",
    asm: "text/x-asm",
    asp: "text/asp",
    asr: "video/x-ms-asf",
    asx: "application/x-mplayer2",
    atom: "application/atom+xml",
    au: "audio/x-au",
    avi: "video/avi",
    avs: "video/avs-video",
    axs: "application/olescript",
    bas: "text/plain",
    bcpio: "application/x-bcpio",
    bin: "application/octet-stream",
    bm: "image/bmp",
    bmp: "image/bmp",
    boo: "application/book",
    book: "application/book",
    boz: "application/x-bzip2",
    bsh: "application/x-bsh",
    bz2: "application/x-bzip2",
    bz: "application/x-bzip",
    cat: "application/vnd.ms-pki.seccat",
    ccad: "application/clariscad",
    cco: "application/x-cocoa",
    cc: "text/plain",
    cdf: "application/cdf",
    cer: "application/pkix-cert",
    cha: "application/x-chat",
    chat: "application/x-chat",
    class: "application/x-java-applet",
    clp: "application/x-msclip",
    cmx: "image/x-cmx",
    cod: "image/cis-cod",
    coffee: "text/x-coffeescript",
    conf: "text/plain",
    cpio: "application/x-cpio",
    cpp: "text/plain",
    cpt: "application/x-cpt",
    crd: "application/x-mscardfile",
    crl: "application/pkix-crl",
    crt: "application/pkix-cert",
    csh: "application/x-csh",
    css: "text/css",
    c: "text/plain",
    "c++": "text/plain",
    cxx: "text/plain",
    dart: "application/dart",
    dcr: "application/x-director",
    deb: "application/x-deb",
    deepv: "application/x-deepv",
    def: "text/plain",
    deploy: "application/octet-stream",
    der: "application/x-x509-ca-cert",
    dib: "image/bmp",
    dif: "video/x-dv",
    dir: "application/x-director",
    disco: "text/xml",
    dll: "application/x-msdownload",
    dl: "video/dl",
    doc: "application/msword",
    docm: "application/vnd.ms-word.document.macroEnabled.12",
    docx: "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
    dot: "application/msword",
    dotm: "application/vnd.ms-word.template.macroEnabled.12",
    dotx: "application/vnd.openxmlformats-officedocument.wordprocessingml.template",
    dp: "application/commonground",
    drw: "application/drafting",
    dtd: "application/xml-dtd",
    dvi: "application/x-dvi",
    dv: "video/x-dv",
    dwf: "drawing/x-dwf (old)",
    dwg: "application/acad",
    dxf: "application/dxf",
    dxr: "application/x-director",
    elc: "application/x-elc",
    el: "text/x-script.elisp",
    eml: "message/rfc822",
    eot: "application/vnd.bw-fontobject",
    eps: "application/postscript",
    es: "application/x-esrehber",
    etx: "text/x-setext",
    evy: "application/envoy",
    exe: "application/octet-stream",
    f77: "text/plain",
    f90: "text/plain",
    fdf: "application/vnd.fdf",
    fif: "image/fif",
    flac: "audio/x-flac",
    fli: "video/fli",
    flo: "image/florian",
    flr: "x-world/x-vrml",
    flx: "text/vnd.fmi.flexstor",
    fmf: "video/x-atomic3d-feature",
    for: "text/plain",
    fpx: "image/vnd.fpx",
    frl: "application/freeloader",
    f: "text/plain",
    funk: "audio/make",
    g3: "image/g3fax",
    gif: "image/gif",
    gl: "video/gl",
    gsd: "audio/x-gsm",
    gsm: "audio/x-gsm",
    gsp: "application/x-gsp",
    gss: "application/x-gss",
    gtar: "application/x-gtar",
    g: "text/plain",
    gz: "application/x-gzip",
    gzip: "application/x-gzip",
    hdf: "application/x-hdf",
    help: "application/x-helpfile",
    hgl: "application/vnd.hp-HPGL",
    hh: "text/plain",
    hlb: "text/x-script",
    hlp: "application/x-helpfile",
    hpg: "application/vnd.hp-HPGL",
    hpgl: "application/vnd.hp-HPGL",
    hqx: "application/binhex",
    hta: "application/hta",
    htc: "text/x-component",
    h: "text/plain",
    htmls: "text/html",
    html: "text/html",
    htm: "text/html",
    htt: "text/webviewhtml",
    htx: "text/html",
    ice: "x-conference/x-cooltalk",
    ico: "image/x-icon",
    ics: "text/calendar",
    idc: "text/plain",
    ief: "image/ief",
    iefs: "image/ief",
    iges: "application/iges",
    igs: "application/iges",
    iii: "application/x-iphone",
    ima: "application/x-ima",
    imap: "application/x-httpd-imap",
    inf: "application/inf",
    ins: "application/x-internett-signup",
    ip: "application/x-ip2",
    isp: "application/x-internet-signup",
    isu: "video/x-isvideo",
    it: "audio/it",
    iv: "application/x-inventor",
    ivf: "video/x-ivf",
    ivr: "i-world/i-vrml",
    ivy: "application/x-livescreen",
    jam: "audio/x-jam",
    jar: "application/java-archive",
    java: "text/plain",
    jav: "text/plain",
    jcm: "application/x-java-commerce",
    jfif: "image/jpeg",
    "jfif-tbnl": "image/jpeg",
    jpeg: "image/jpeg",
    jpe: "image/jpeg",
    jpg: "image/jpeg",
    jps: "image/x-jps",
    js: "application/javascript",
    json: "application/json",
    jut: "image/jutvision",
    kar: "audio/midi",
    ksh: "text/x-script.ksh",
    la: "audio/nspaudio",
    lam: "audio/x-liveaudio",
    latex: "application/x-latex",
    list: "text/plain",
    lma: "audio/nspaudio",
    log: "text/plain",
    lsp: "application/x-lisp",
    lst: "text/plain",
    lsx: "text/x-la-asf",
    ltx: "application/x-latex",
    m13: "application/x-msmediaview",
    m14: "application/x-msmediaview",
    m1v: "video/mpeg",
    m2a: "audio/mpeg",
    m2v: "video/mpeg",
    m3u: "audio/x-mpequrl",
    m4a: "audio/mp4",
    m4v: "video/mp4",
    man: "application/x-troff-man",
    manifest: "application/x-ms-manifest",
    map: "application/x-navimap",
    mar: "text/plain",
    mbd: "application/mbedlet",
    mc$: "application/x-magic-cap-package-1.0",
    mcd: "application/mcad",
    mcf: "image/vasa",
    mcp: "application/netmc",
    mdb: "application/x-msaccess",
    mesh: "model/mesh",
    me: "application/x-troff-me",
    mid: "audio/midi",
    midi: "audio/midi",
    mif: "application/x-mif",
    mjf: "audio/x-vnd.AudioExplosion.MjuiceMediaFile",
    mjpg: "video/x-motion-jpeg",
    mm: "application/base64",
    mme: "application/base64",
    mny: "application/x-msmoney",
    mod: "audio/mod",
    mov: "video/quicktime",
    movie: "video/x-sgi-movie",
    mp2: "video/mpeg",
    mp3: "audio/mpeg",
    mp4: "video/mp4",
    mp4a: "audio/mp4",
    mp4v: "video/mp4",
    mpa: "audio/mpeg",
    mpc: "application/x-project",
    mpeg: "video/mpeg",
    mpe: "video/mpeg",
    mpga: "audio/mpeg",
    mpg: "video/mpeg",
    mpp: "application/vnd.ms-project",
    mpt: "application/x-project",
    mpv2: "video/mpeg",
    mpv: "application/x-project",
    mpx: "application/x-project",
    mrc: "application/marc",
    ms: "application/x-troff-ms",
    msh: "model/mesh",
    m: "text/plain",
    mvb: "application/x-msmediaview",
    mv: "video/x-sgi-movie",
    my: "audio/make",
    mzz: "application/x-vnd.AudioExplosion.mzz",
    nap: "image/naplps",
    naplps: "image/naplps",
    nc: "application/x-netcdf",
    ncm: "application/vnd.nokia.configuration-message",
    niff: "image/x-niff",
    nif: "image/x-niff",
    nix: "application/x-mix-transfer",
    nsc: "application/x-conference",
    nvd: "application/x-navidoc",
    nws: "message/rfc822",
    oda: "application/oda",
    ods: "application/oleobject",
    oga: "audio/ogg",
    ogg: "audio/ogg",
    ogv: "video/ogg",
    ogx: "application/ogg",
    omc: "application/x-omc",
    omcd: "application/x-omcdatamaker",
    omcr: "application/x-omcregerator",
    opus: "audio/ogg",
    oxps: "application/oxps",
    p10: "application/pkcs10",
    p12: "application/pkcs-12",
    p7a: "application/x-pkcs7-signature",
    p7b: "application/x-pkcs7-certificates",
    p7c: "application/pkcs7-mime",
    p7m: "application/pkcs7-mime",
    p7r: "application/x-pkcs7-certreqresp",
    p7s: "application/pkcs7-signature",
    part: "application/pro_eng",
    pas: "text/pascal",
    pbm: "image/x-portable-bitmap",
    pcl: "application/x-pcl",
    pct: "image/x-pict",
    pcx: "image/x-pcx",
    pdb: "chemical/x-pdb",
    pdf: "application/pdf",
    pfunk: "audio/make",
    pfx: "application/x-pkcs12",
    pgm: "image/x-portable-graymap",
    pic: "image/pict",
    pict: "image/pict",
    pkg: "application/x-newton-compatible-pkg",
    pko: "application/vnd.ms-pki.pko",
    pl: "text/plain",
    plx: "application/x-PiXCLscript",
    pm4: "application/x-pagemaker",
    pm5: "application/x-pagemaker",
    pma: "application/x-perfmon",
    pmc: "application/x-perfmon",
    pm: "image/x-xpixmap",
    pml: "application/x-perfmon",
    pmr: "application/x-perfmon",
    pmw: "application/x-perfmon",
    png: "image/png",
    pnm: "application/x-portable-anymap",
    pot: "application/vnd.ms-powerpoint",
    potm: "application/vnd.ms-powerpoint.template.macroEnabled.12",
    potx: "application/vnd.openxmlformats-officedocument.presentationml.template",
    pov: "model/x-pov",
    ppa: "application/vnd.ms-powerpoint",
    ppam: "application/vnd.ms-powerpoint.addin.macroEnabled.12",
    ppm: "image/x-portable-pixmap",
    pps: "application/vnd.ms-powerpoint",
    ppsm: "application/vnd.ms-powerpoint.slideshow.macroEnabled.12",
    ppsx: "application/vnd.openxmlformats-officedocument.presentationml.slideshow",
    ppt: "application/vnd.ms-powerpoint",
    pptm: "application/vnd.ms-powerpoint.presentation.macroEnabled.12",
    pptx: "application/vnd.openxmlformats-officedocument.presentationml.presentation",
    ppz: "application/mspowerpoint",
    pre: "application/x-freelance",
    prf: "application/pics-rules",
    prt: "application/pro_eng",
    ps: "application/postscript",
    p: "text/x-pascal",
    pub: "application/x-mspublisher",
    pvu: "paleovu/x-pv",
    pwz: "application/vnd.ms-powerpoint",
    pyc: "applicaiton/x-bytecode.python",
    py: "text/x-script.phyton",
    qcp: "audio/vnd.qcelp",
    qd3d: "x-world/x-3dmf",
    qd3: "x-world/x-3dmf",
    qif: "image/x-quicktime",
    qtc: "video/x-qtc",
    qtif: "image/x-quicktime",
    qti: "image/x-quicktime",
    qt: "video/quicktime",
    ra: "audio/x-pn-realaudio",
    ram: "audio/x-pn-realaudio",
    ras: "application/x-cmu-raster",
    rast: "image/cmu-raster",
    rexx: "text/x-script.rexx",
    rf: "image/vnd.rn-realflash",
    rgb: "image/x-rgb",
    rm: "application/vnd.rn-realmedia",
    rmi: "audio/mid",
    rmm: "audio/x-pn-realaudio",
    rmp: "audio/x-pn-realaudio",
    rng: "application/ringing-tones",
    rnx: "application/vnd.rn-realplayer",
    roff: "application/x-troff",
    rp: "image/vnd.rn-realpix",
    rpm: "audio/x-pn-realaudio-plugin",
    rss: "application/rss+xml",
    rtf: "text/richtext",
    rt: "text/richtext",
    rtx: "text/richtext",
    rv: "video/vnd.rn-realvideo",
    s3m: "audio/s3m",
    sbk: "application/x-tbook",
    scd: "application/x-msschedule",
    scm: "application/x-lotusscreencam",
    sct: "text/scriptlet",
    sdml: "text/plain",
    sdp: "application/sdp",
    sdr: "application/sounder",
    sea: "application/sea",
    set: "application/set",
    setpay: "application/set-payment-initiation",
    setreg: "application/set-registration-initiation",
    sgml: "text/sgml",
    sgm: "text/sgml",
    shar: "application/x-bsh",
    sh: "text/x-script.sh",
    shtml: "text/html",
    sid: "audio/x-psid",
    silo: "model/mesh",
    sit: "application/x-sit",
    skd: "application/x-koan",
    skm: "application/x-koan",
    skp: "application/x-koan",
    skt: "application/x-koan",
    sl: "application/x-seelogo",
    smi: "application/smil",
    smil: "application/smil",
    snd: "audio/basic",
    sol: "application/solids",
    spc: "application/x-pkcs7-certificates",
    spl: "application/futuresplash",
    spr: "application/x-sprite",
    sprite: "application/x-sprite",
    spx: "audio/ogg",
    src: "application/x-wais-source",
    ssi: "text/x-server-parsed-html",
    ssm: "application/streamingmedia",
    sst: "application/vnd.ms-pki.certstore",
    step: "application/step",
    s: "text/x-asm",
    stl: "application/sla",
    stm: "text/html",
    stp: "application/step",
    sv4cpio: "application/x-sv4cpio",
    sv4crc: "application/x-sv4crc",
    svf: "image/x-dwg",
    svg: "image/svg+xml",
    svr: "application/x-world",
    swf: "application/x-shockwave-flash",
    talk: "text/x-speech",
    t: "application/x-troff",
    tar: "application/x-tar",
    tbk: "application/toolbook",
    tcl: "text/x-script.tcl",
    tcsh: "text/x-script.tcsh",
    tex: "application/x-tex",
    texi: "application/x-texinfo",
    texinfo: "application/x-texinfo",
    text: "text/plain",
    tgz: "application/x-compressed",
    tiff: "image/tiff",
    tif: "image/tiff",
    tr: "application/x-troff",
    trm: "application/x-msterminal",
    ts: "text/x-typescript",
    tsi: "audio/tsp-audio",
    tsp: "audio/tsplayer",
    tsv: "text/tab-separated-values",
    ttf: "application/x-font-ttf",
    turbot: "image/florian",
    txt: "text/plain",
    uil: "text/x-uil",
    uls: "text/iuls",
    unis: "text/uri-list",
    uni: "text/uri-list",
    unv: "application/i-deas",
    uris: "text/uri-list",
    uri: "text/uri-list",
    ustar: "multipart/x-ustar",
    uue: "text/x-uuencode",
    uu: "text/x-uuencode",
    vcd: "application/x-cdlink",
    vcf: "text/vcard",
    vcard: "text/vcard",
    vcs: "text/x-vCalendar",
    vda: "application/vda",
    vdo: "video/vdo",
    vew: "application/groupwise",
    vivo: "video/vivo",
    viv: "video/vivo",
    vmd: "application/vocaltec-media-desc",
    vmf: "application/vocaltec-media-file",
    voc: "audio/voc",
    vos: "video/vosaic",
    vox: "audio/voxware",
    vqe: "audio/x-twinvq-plugin",
    vqf: "audio/x-twinvq",
    vql: "audio/x-twinvq-plugin",
    vrml: "application/x-vrml",
    vrt: "x-world/x-vrt",
    vsd: "application/x-visio",
    vst: "application/x-visio",
    vsw: "application/x-visio",
    w60: "application/wordperfect6.0",
    w61: "application/wordperfect6.1",
    w6w: "application/msword",
    wav: "audio/wav",
    wb1: "application/x-qpro",
    wbmp: "image/vnd.wap.wbmp",
    wcm: "application/vnd.ms-works",
    wdb: "application/vnd.ms-works",
    web: "application/vnd.xara",
    webm: "video/webm",
    wiz: "application/msword",
    wk1: "application/x-123",
    wks: "application/vnd.ms-works",
    wmf: "windows/metafile",
    wmlc: "application/vnd.wap.wmlc",
    wmlsc: "application/vnd.wap.wmlscriptc",
    wmls: "text/vnd.wap.wmlscript",
    wml: "text/vnd.wap.wml",
    wmp: "video/x-ms-wmp",
    wmv: "video/x-ms-wmv",
    wmx: "video/x-ms-wmx",
    woff: "application/x-woff",
    word: "application/msword",
    wp5: "application/wordperfect",
    wp6: "application/wordperfect",
    wp: "application/wordperfect",
    wpd: "application/wordperfect",
    wps: "application/vnd.ms-works",
    wq1: "application/x-lotus",
    wri: "application/mswrite",
    wrl: "application/x-world",
    wrz: "model/vrml",
    wsc: "text/scriplet",
    wsdl: "text/xml",
    wsrc: "application/x-wais-source",
    wtk: "application/x-wintalk",
    wvx: "video/x-ms-wvx",
    x3d: "model/x3d+xml",
    x3db: "model/x3d+fastinfoset",
    x3dv: "model/x3d-vrml",
    xaf: "x-world/x-vrml",
    xaml: "application/xaml+xml",
    xap: "application/x-silverlight-app",
    xbap: "application/x-ms-xbap",
    xbm: "image/x-xbitmap",
    xdr: "video/x-amt-demorun",
    xgz: "xgl/drawing",
    xht: "application/xhtml+xml",
    xhtml: "application/xhtml+xml",
    xif: "image/vnd.xiff",
    xla: "application/vnd.ms-excel",
    xlam: "application/vnd.ms-excel.addin.macroEnabled.12",
    xl: "application/excel",
    xlb: "application/excel",
    xlc: "application/excel",
    xld: "application/excel",
    xlk: "application/excel",
    xll: "application/excel",
    xlm: "application/excel",
    xls: "application/vnd.ms-excel",
    xlsb: "application/vnd.ms-excel.sheet.binary.macroEnabled.12",
    xlsm: "application/vnd.ms-excel.sheet.macroEnabled.12",
    xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    xlt: "application/vnd.ms-excel",
    xltm: "application/vnd.ms-excel.template.macroEnabled.12",
    xltx: "application/vnd.openxmlformats-officedocument.spreadsheetml.template",
    xlv: "application/excel",
    xlw: "application/excel",
    xm: "audio/xm",
    xml: "text/xml",
    xmz: "xgl/movie",
    xof: "x-world/x-vrml",
    xpi: "application/x-xpinstall",
    xpix: "application/x-vnd.ls-xpix",
    xpm: "image/xpm",
    xps: "application/vnd.ms-xpsdocument",
    "x-png": "image/png",
    xsd: "text/xml",
    xsl: "text/xml",
    xslt: "text/xml",
    xsr: "video/x-amt-showrun",
    xwd: "image/x-xwd",
    xyz: "chemical/x-pdb",
    z: "application/x-compressed",
    zip: "application/zip",
    zsh: "text/x-script.zsh",
} as const)

export function getMimeType(fileName: string): string {
    if (fileName == null) throw new Error("fileName is null!")
    const aos = MimeTypes["exe"]
    const dot = fileName.lastIndexOf(".")

    if (dot !== -1 && fileName.length > dot + 1) {
        const ext = fileName.substring(dot + 1)
        return ext in MimeTypes ? MimeTypes[ext as keyof typeof MimeTypes] : aos
    }

    return aos
}