# wget(1) completion                                       -*- shell-script -*-

_wget()
{
    local cur prev words cword split
    _init_completion -s || return

    case $prev in
        --version | --help | -!(-*)[hV])
            return
            ;;
        --progress)
            COMPREPLY=($(compgen -W 'bar dot' -- "$cur"))
            return
            ;;
        --bind-address)
            _ip_addresses
            return
            ;;
        --domains | --exclude-domains | -!(-*)D)
            _known_hosts_real -- "$cur"
            return
            ;;
        --restrict-file-names)
            local excludes=()
            case $cur in
                *unix* | *windows*)
                    excludes=(windows unix)
                    ;;&
                *lowercase* | *uppercase*)
                    excludes+=(lowercase uppercase)
                    ;;&
                *nocontrol*)
                    excludes+=(nocontrol)
                    ;;&
                *ascii*)
                    excludes+=(ascii)
                    ;;
            esac
            local excludes_str=$(
                export IFS='|'
                echo "${excludes[*]}"
            )

            # prevopt is the previous options string used as a prefix
            # to avoid COMPREPLY replacing them with the $lastopt completion
            local lastopt=${cur/*,/} prevopt=
            [[ $cur == *,* ]] && prevopt=${cur%,*},

            COMPREPLY=($(compgen -P "$prevopt" -X "@($excludes_str)" \
                -W 'unix windows nocontrol ascii lowercase uppercase' \
                -- "$lastopt"))

            # +o nospace when no more valid option is possible (= append a space)
            local opt_as_arr=(${COMPREPLY[0]//,/ })
            ((${#opt_as_arr[@]} < 4)) && compopt -o nospace
            return
            ;;
        --prefer-family)
            COMPREPLY=($(compgen -W 'IPv4 IPv6 none' -- "$cur"))
            return
            ;;
        --directory-prefix | --ca-directory | --warc-tempdir | -!(-*)P)
            _filedir -d
            return
            ;;
        --output-file | --append-output | --config | --load-cookies | --save-cookies | \
            --post-file | --certificate | --ca-certificate | --private-key | \
            --random-file | --egd-file | --warc-file | --warc-dedup | -!(-*)[oa])
            _filedir
            return
            ;;
        --output-document | --input-file | -!(-*)[Oi])
            _filedir && [[ $cur == - || -z $cur ]] && COMPREPLY+=(-)
            return
            ;;
        --secure-protocol)
            COMPREPLY=($(compgen -W 'auto SSLv2 SSLv3 TLSv1' -- "$cur"))
            return
            ;;
        --certificate-type | --private-key-type)
            COMPREPLY=($(compgen -W 'PEM DER' -- "$cur"))
            return
            ;;
        --follow-tags | --ignore-tags)
            local lastopt=${cur/*,/} prevopt=
            [[ $cur == *,* ]] && prevopt=${cur%,*},

            COMPREPLY=($(compgen -P "$prevopt" -W 'a abbr acronym address
                applet area b base basefont bdo big blockquote body br button
                caption center cite code col colgroup dd del dir div dfn dl dt
                em fieldset font form frame frameset h6 head hr html i iframe
                img input ins isindex kbd label legend li link map menu meta
                noframes noscript object ol optgroup option p param pre q s
                samp script select small span strike strong style sub sup table
                tbody td textarea tfoot th thead title tr tt u ul var xmp' \
                -- "$lastopt"))
            return
            ;;
        --tries | --timeout | --dns-timeout | --connect-timeout | --read-timeout | \
            --wait | --waitretry | --cut-dirs | --max-redirect | --level | -!(-*)[tTwl])
            # expect integer number
            COMPREPLY+=($(compgen -P "$cur" -W "{0..9}"))
            compopt -o nospace
            return
            ;;
        --quota | --limit-rate | --warc-max-size | -!(-*)Q)
            # expect size
            if [[ $cur == *[km] ]]; then
                COMPREPLY=($(compgen -W "$cur"))
            elif [[ $cur ]]; then
                COMPREPLY=($(compgen -P "$cur" -W "{0..9} k m"))
                compopt -o nospace
            else
                COMPREPLY=($(compgen -W "{0..9}"))
                compopt -o nospace
            fi
            return
            ;;
        --user | --http-user | --proxy-user | --ftp-user)
            COMPREPLY=($(compgen -W "$(command sed -n \
                '/^login/s/^[[:blank:]]*login[[:blank:]]//p' ~/.netrc \
                2>/dev/null)" -- "$cur"))
            return
            ;;
        --header)
            COMPREPLY=($(compgen -W 'Accept Accept-Charset Accept-Encoding
                Accept-Language Accept-Ranges Age Allow Authorization
                Cache-Control Connection Content-Encoding Content-Language
                Content-Length Content-Location Content-MD5 Content-Range
                Content-Type Date ETag Expect Expires From Host If-Match
                If-Modified-Since If-None-Match If-Range If-Unmodified-Since
                Last-Modified Location Max-Forwards Pragma Proxy-Authenticate
                Proxy-Authorization Range Referer Retry-After Server TE Trailer
                Transfer-Encoding Upgrade User-Agent Vary Via Warning
                WWW-Authenticate' -- "$cur"))
            compopt -o nospace
            return
            ;;
        --local-encoding | --remote-encoding)
            type -P xauth &>/dev/null && _xfunc iconv _iconv_charsets
            return
            ;;
        --execute | -!(-*)e)
            return # TODO base=STR
            ;;
        --report-speed)
            COMPREPLY=($(compgen -W 'bits' -- "$cur"))
            return
            ;;
        --regex-type)
            COMPREPLY=($(compgen -W 'posix' -- "$cur"))
            return
            ;;
        --base | --password | --ftp-password | --http-password | --proxy-password | \
            --default-page | --referer | --user-agent | --post-data | --warc-header | \
            --accept | --reject | --accept-regex | --reject-regex | --include-directories | \
            --exclude-directories | -!(-*)[BUARIX])
            # argument required but no completions available
            return
            ;;
    esac

    $split && return

    if [[ $cur == -* ]]; then
        COMPREPLY=($(compgen -W '$(_parse_help "$1")' -- "$cur"))
        [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
    fi

} &&
    complete -F _wget wget

# ex: filetype=sh
