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#compdef docker 
#
# zsh completion for docker (http://docker.io)
#
# version:  0.2.2
# author:   Felix Riedel
# license:  BSD License
# github:   https://github.com/felixr/docker-zsh-completion
#

__parse_docker_list() {
    sed -e '/^ID/d' -e 's/[ ]\{2,\}/|/g' -e 's/ \([hdwm]\)\(inutes\|ays\|ours\|eeks\)/\1/' | awk ' BEGIN {FS="|"} { printf("%s:%7s, %s\n", $1, $4, $2)}'
}

__docker_stoppedcontainers() {
    local expl
    declare -a stoppedcontainers 
    stoppedcontainers=(${(f)"$(docker ps -a | grep --color=never 'Exit' |  __parse_docker_list )"})
    _describe -t containers-stopped "Stopped Containers" stoppedcontainers 
}

__docker_runningcontainers() {
    local expl
    declare -a containers 

    containers=(${(f)"$(docker ps | __parse_docker_list)"})
    _describe -t containers-active "Running Containers" containers 
}

__docker_containers () {
    __docker_stoppedcontainers 
    __docker_runningcontainers
}

__docker_images () {
    local expl
    declare -a images
    images=(${(f)"$(docker images | awk '(NR > 1){printf("%s\\:%s\n", $1,$2)}')"})
    images=($images ${(f)"$(docker images | awk '(NR > 1){printf("%s:%-15s in %s\n", $3,$2,$1)}')"})
    _describe -t docker-images "Images" images
}

__docker_tags() {
    local expl
    declare -a tags
    tags=(${(f)"$(docker images | awk '(NR>1){print $2}'| sort | uniq)"})
    _describe -t docker-tags "tags" tags
}

__docker_search() {
    # declare -a dockersearch
    local cache_policy
    zstyle -s ":completion:${curcontext}:" cache-policy cache_policy
    if [[ -z "$cache_policy" ]]; then
        zstyle ":completion:${curcontext}:" cache-policy __docker_caching_policy 
    fi

    local searchterm cachename
    searchterm="${words[$CURRENT]%/}"
    cachename=_docker-search-$searchterm

    local expl
    local -a result 
    if ( [[ ${(P)+cachename} -eq 0 ]] || _cache_invalid ${cachename#_} ) \
        && ! _retrieve_cache ${cachename#_}; then
        _message "Searching for ${searchterm}..."
        result=(${(f)"$(docker search ${searchterm} | awk '(NR>2){print $1}')"})
        _store_cache ${cachename#_} result
    fi 
    _wanted dockersearch expl 'Available images' compadd -a result 
}

__docker_caching_policy()
{
  # oldp=( "$1"(Nmh+24) )     # 24 hour
  oldp=( "$1"(Nmh+1) )     # 24 hour
  (( $#oldp ))
}


__docker_repositories () {
    local expl
    declare -a repos
    repos=(${(f)"$(docker images | sed -e '1d' -e 's/[ ].*//' | sort | uniq)"})
    _describe -t docker-repos "Repositories" repos
}

__docker_commands () {
    # local -a  _docker_subcommands
    local cache_policy

    zstyle -s ":completion:${curcontext}:" cache-policy cache_policy
    if [[ -z "$cache_policy" ]]; then
        zstyle ":completion:${curcontext}:" cache-policy __docker_caching_policy 
    fi

    if ( [[ ${+_docker_subcommands} -eq 0 ]] || _cache_invalid docker_subcommands) \
        && ! _retrieve_cache docker_subcommands; 
    then
        _docker_subcommands=(${${(f)"$(_call_program commands 
        docker 2>&1 | sed -e '1,6d' -e '/^[ ]*$/d' -e 's/[ ]*\([^ ]\+\)\s*\([^ ].*\)/\1:\2/' )"}})
        _docker_subcommands=($_docker_subcommands 'help:Show help for a command') 
        _store_cache docker_subcommands _docker_subcommands
    fi
    _describe -t docker-commands "docker command" _docker_subcommands
}

__docker_subcommand () {
    local -a _command_args
    case "$words[1]" in
        (attach|wait)
            _arguments ':containers:__docker_runningcontainers'
            ;;
        (build)
            _arguments \
                '-t=-:repository:__docker_repositories' \
                ':path or URL:_directories'
            ;;
        (commit)
            _arguments \
                ':container:__docker_containers' \
                ':repository:__docker_repositories' \
                ':tag: '
            ;;
        (diff|export|logs)
            _arguments '*:containers:__docker_containers'
            ;;
        (history)
            _arguments '*:images:__docker_images'
            ;;
        (images)
            _arguments \
                '-a[Show all images]' \
                ':repository:__docker_repositories'
            ;;
        (inspect)
            _arguments '*:containers:__docker_containers'
            ;;
        (history)
            _arguments ':images:__docker_images'
            ;;
        (kill)
            _arguments '*:containers:__docker_runningcontainers'
            ;;
        (port)
            _arguments '1:containers:__docker_runningcontainers'
            ;;
        (start)
            _arguments '*:containers:__docker_stoppedcontainers'
            ;;
        (rm)
            _arguments '-v[Remove the volumes associated to the container]' \
                '*:containers:__docker_stoppedcontainers'
            ;;
        (rmi)
            _arguments '-v[Remove the volumes associated to the container]' \
                '*:images:__docker_images'
            ;;
        (top)
            _arguments '1:containers:__docker_runningcontainers'
            ;;
        (restart|stop)
            _arguments '-t=-[Number of seconds to try to stop for before killing the container]:seconds to before killing:(1 5 10 30 60)' \
                '*:containers:__docker_runningcontainers'
            ;;
        (top)
            _arguments ':containers:__docker_runningcontainers'
            ;;
        (ps)
            _arguments '-a[Show all containers. Only running containers are shown by default]' \
                '-h[Show help]' \
                '--before-id=-[Show only container created before Id, include non-running one]:containers:__docker_containers' \
            '-n=-[Show n last created containers, include non-running one]:n:(1 5 10 25 50)'
            ;;
        (tag)
            _arguments \
                '-f[force]'\
                ':image:__docker_images'\
                ':repository:__docker_repositories' \
                ':tag:__docker_tags'
            ;;
        (run)
            _arguments \
                '-a=-[Attach to stdin, stdout or stderr]:toggle:(true false)' \
                '-c=-[CPU shares (relative weight)]:CPU shares: ' \
                '-d[Detached mode: leave the container running in the background]' \
                '*--dns=[Set custom dns servers]:dns server: ' \
                '*-e=[Set environment variables]:environment variable: ' \
                '--entrypoint=-[Overwrite the default entrypoint of the image]:entry point: ' \
                '-h=-[Container host name]:hostname:_hosts' \
                '-i[Keep stdin open even if not attached]' \
                '-m=-[Memory limit (in bytes)]:limit: ' \
                '*-p=-[Expose a container''s port to the host]:port:_ports' \
                '-t=-[Allocate a pseudo-tty]:toggle:(true false)' \
                '-u=-[Username or UID]:user:_users' \
                '*-v=-[Bind mount a volume (e.g. from the host: -v /host:/container, from docker: -v /container)]:volume: '\
                '--volumes-from=-[Mount volumes from the specified container]:volume: ' \
                '(-):images:__docker_images' \
                '(-):command: _command_names -e' \
                '*::arguments: _normal'
                ;;
        (pull|search)
            _arguments ':name:__docker_search'
            ;;
        (help)
            _arguments ':subcommand:__docker_commands'
            ;;
        (*)
            _message 'Unknown sub command'
    esac

}

_docker () {
    local curcontext="$curcontext" state line
    typeset -A opt_args

    _arguments -C \
      '-H=-[tcp://host:port to bind/connect to]:socket: ' \
         '(-): :->command' \
         '(-)*:: :->option-or-argument' 

    if (( CURRENT == 1 )); then

    fi
    case $state in 
        (command)
            __docker_commands
            ;;
        (option-or-argument)
            curcontext=${curcontext%:*:*}:docker-$words[1]:
            __docker_subcommand 
            ;;
    esac
}

_docker "$@"