import net.http
import json

struct MimeType {
    source       string
    extensions   []string
    compressible bool
    charset      string
}

fn main() {
    mime_folder := dir(executable())
    chdir(mime_folder)!
    //
    mt_json := http.get('https://raw.githubusercontent.com/jshttp/mime-db/master/db.json')!
    mt_map := json.decode(map[string]MimeType, mt_json.body)!

    mut ext_to_mt_str := map[string]string{}
    for mt_str, mt in mt_map {
        for ext in mt.extensions {
            ext_to_mt_str[ext] = mt_str
        }
    }
    ext_to_mt_str['v'] = 'text/x-vlang'
    ext_to_mt_str['vsh'] = 'text/x-vlang'

    write_file('db.v', '
    module mime

    // FILE AUTOGENERATED BY `build.vsh` - DO NOT MANUALLY EDIT

    const db = ${mt_map}
    
    const ext_to_mt_str = ${ext_to_mt_str}    
    ')!
    execute('${@VEXE} fmt -w db.v')
    println('db.v was regenerated. New file size: ${file_size('db.v')} bytes .')
}