#compdef docker-machine
# Description
# -----------
#  zsh completion for docker-machine
#  https://github.com/leonhartX/docker-machine-zsh-completion
# -------------------------------------------------------------------------
# Version
# -------
#  0.1.1
# -------------------------------------------------------------------------
# Authors
# -------
#  * Ke Xu <leonhartx.k@gmail.com>
# -------------------------------------------------------------------------
# Inspiration
# -----------
#  * @sdurrheimer docker-compose-zsh-completion https://github.com/sdurrheimer/docker-compose-zsh-completion
#  * @ilkka _docker-machine


__docker-machine_get_hosts() {
    [[ $PREFIX = -* ]] && return 1
    local state
    declare -a hosts
    state=$1; shift
    if [[ $state != all ]]; then
        hosts=(${(f)"$(_call_program commands docker-machine ls -q --filter state=$state)"})
    else
        hosts=(${(f)"$(_call_program commands docker-machine ls -q)"})
    fi
    _describe 'host' hosts "$@" && ret=0
    return ret
}

__docker-machine_hosts_with_state() {
    declare -a hosts
    hosts=(${(f)"$(_call_program commands docker-machine ls -f '{{.Name}}\:{{.DriverName}}\({{.State}}\)\ {{.URL}}')"})
    _describe 'host' hosts
}

__docker-machine_hosts_all() {
    __docker-machine_get_hosts all "$@"
}

__docker-machine_hosts_running() {
    __docker-machine_get_hosts Running "$@"
}

__docker-machine_get_swarm() {
    declare -a swarms
    swarms=(${(f)"$(_call_program commands docker-machine ls -f {{.Swarm}} | awk '{print $1}')"})
    _describe 'swarm' swarms
}

__docker-machine_hosts_and_files() {
    _alternative "hosts:host:__docker-machine_hosts_all -qS ':'" 'files:files:_path_files'
}

__docker-machine_filters() {
    [[ $PREFIX = -* ]] && return 1
    integer ret=1

    if compset -P '*='; then
        case "${${words[-1]%=*}#*=}" in
            (driver)
                _describe -t driver-filter-opts "driver filter" opts_driver && ret=0
                ;;
            (swarm)
                __docker-machine_get_swarm && ret=0
                ;;
            (state)
                opts_state=('Running' 'Paused' 'Saved' 'Stopped' 'Stopping' 'Starting' 'Error')
                _describe -t state-filter-opts "state filter" opts_state && ret=0
                ;;
            (name)
                __docker-machine_hosts_all && ret=0
                ;;
            (label)
                _message 'label' && ret=0
                ;;
            *)
                _message 'value' && ret=0
                ;;
        esac
    else
        opts=('driver' 'swarm' 'state' 'name' 'label')
        _describe -t filter-opts "filter" opts -qS "=" && ret=0
    fi
    return ret
}

__get_swarm_discovery() {
    declare -a masters services
    local service
    services=()
    masters=($(docker-machine ls -f {{.Swarm}} |grep '(master)' |awk '{print $1}'))
    for master in $masters; do
         service=${${${(f)"$(_call_program commands docker-machine inspect -f '{{.HostOptions.SwarmOptions.Discovery}}:{{.Name}}' $master)"}/:/\\:}}
         services=($services $service)
    done
    _describe -t services "swarm service" services && ret=0
    return ret
}

__get_create_argument() {
    typeset -g docker_machine_driver
    if [[ CURRENT -le 2 ]]; then
        docker_machine_driver="none"
    elif [[ CURRENT > 2 && $words[CURRENT-2] = '-d' || $words[CURRENT-2] = '--driver' ]]; then
        docker_machine_driver=$words[CURRENT-1]
    elif [[ $words[CURRENT-1] =~ '^(-d|--driver)=' ]]; then
        docker_machine_driver=${${words[CURRENT-1]}/*=/}
    fi
    local driver_opt_cmd
    local -a opts_provider opts_common opts_read_argument
    opts_read_argument=(
        ": :->argument"
    )
    opts_common=(
        $opts_help \
        '(--driver -d)'{--driver=,-d=}'[Driver to create machine with]:dirver:->driver-option' \
        '--engine-install-url=[Custom URL to use for engine installation]:url' \
        '*--engine-opt=[Specify arbitrary flags to include with the created engine in the form flag=value]:flag' \
        '*--engine-insecure-registry=[Specify insecure registries to allow with the created engine]:registry' \
        '*--engine-registry-mirror=[Specify registry mirrors to use]:mirror' \
        '*--engine-label=[Specify labels for the created engine]:label' \
        '--engine-storage-driver=[Specify a storage driver to use with the engine]:storage-driver:->storage-driver-option' \
        '*--engine-env=[Specify environment variables to set in the engine]:environment' \
        '--swarm[Configure Machine with Swarm]' \
        '--swarm-image=[Specify Docker image to use for Swarm]:image' \
        '--swarm-master[Configure Machine to be a Swarm master]' \
        '--swarm-discovery=[Discovery service to use with Swarm]:service:->swarm-service' \
        '--swarm-strategy=[Define a default scheduling strategy for Swarm]:strategy:(spread binpack random)' \
        '*--swarm-opt=[Define arbitrary flags for swarm]:flag' \
        '*--swarm-join-opt=[Define arbitrary flags for Swarm join]:flag' \
        '--swarm-host=[ip/socket to listen on for Swarm master]:host' \
        '--swarm-addr=[addr to advertise for Swarm (default: detect and use the machine IP)]:address' \
        '--swarm-experimental[Enable Swarm experimental features]' \
        '*--tls-san=[Support extra SANs for TLS certs]:option'
    )
    driver_opt_cmd="docker-machine create -d $docker_machine_driver | grep $docker_machine_driver | sed -e 's/\(--.*\)\ *\[\1[^]]*\]/*\1/g' -e 's/\(\[[^]]*\)/\\\\\\1\\\\/g' -e 's/\".*\"\(.*\)/\1/g' | awk '{printf \"%s[\", \$1; for(i=2;i<=NF;i++) {printf \"%s \", \$i}; print \"]\"}'"
    if [[ $docker_machine_driver != "none" ]]; then
        opts_provider=(${(f)"$(_call_program commands $driver_opt_cmd)"})
        _arguments \
            $opts_provider \
            $opts_read_argument \
            $opts_common && ret=0
    else
        _arguments $opts_common && ret=0
    fi
    case $state in
        (driver-option)
            _describe -t driver-option "driver" opts_driver && ret=0
            ;;
        (storage-driver-option)
            _describe -t storage-driver-option "storage driver" opts_storage_driver && ret=0
            ;;
        (swarm-service)
            __get_swarm_discovery && ret=0
            ;;
        (argument)
            ret=0
            ;;
    esac
    return ret
}


__docker-machine_subcommand() {
    local -a opts_help
    opts_help=("(- :)--help[Print usage]")
    local -a opts_only_host opts_driver opts_storage_driver opts_state
    opts_only_host=(
        "$opts_help"
        "*:host:__docker-machine_hosts_all"
    )
    opts_driver=('amazonec2' 'azure' 'digitalocean' 'exoscale' 'generic' 'google' 'hyperv' 'none' 'openstack' 'rackspace' 'softlayer' 'virtualbox' 'vmwarefusion' 'vmwarevcloudair' 'vmwarevsphere')
    opts_storage_driver=('overlay' 'aufs' 'btrfs' 'devicemapper' 'vfs' 'zfs')
    integer ret=1

    case "$words[1]" in
        (active)
            _arguments \
                $opts_help \
                '(--timeout -t)'{--timeout=,-t=}'[Timeout in seconds, default to 10s]:seconds' && ret=0
            ;;
        (config)
            _arguments \
                $opts_help \
                '--swarm[Display the Swarm config instead of the Docker daemon]' \
                "*:host:__docker-machine_hosts_all" && ret=0
            ;;
        (create)
            __get_create_argument
           ;;
        (env)
            _arguments \
                $opts_help \
                '--swarm[Display the Swarm config instead of the Docker daemon]' \
                '--shell=[Force environment to be configured for a specified shell: \[fish, cmd, powershell\], default is auto-detect]:shell' \
                '(--unset -u)'{--unset,-u}'[Unset variables instead of setting them]' \
                '--no-proxy[Add machine IP to NO_PROXY environment variable]' \
                '*:host:__docker-machine_hosts_running' && ret=0
            ;;
        (help)
            _arguments ':subcommand:__docker-machine_commands' && ret=0
            ;;
        (inspect)
            _arguments \
                $opts_help \
                '(--format -f)'{--format=,-f=}'[Format the output using the given go template]:template' \
                '*:host:__docker-machine_hosts_all' && ret=0
            ;;
        (ip)
            _arguments \
                $opts_help \
                '*:host:__docker-machine_hosts_running' && ret=0
            ;;
        (kill)
             _arguments \
                $opts_help \
                '*:host:__docker-machine_hosts_with_state' && ret=0
            ;;
        (ls)
            _arguments \
                $opts_help \
                '(--quiet -q)'{--quiet,-q}'[Enable quiet mode]' \
                '*--filter=[Filter output based on conditions provided]:filter:->filter-options' \
                '(--timeout -t)'{--timeout=,-t=}'[Timeout in seconds, default to 10s]:seconds' \
                '(--format -f)'{--format=,-f=}'[Pretty-print machines using a Go template]:template' && ret=0
            case $state in
                (filter-options)
                    __docker-machine_filters && ret=0
                    ;;
            esac
            ;;
        (provision)
            _arguments $opts_only_host && ret=0
            ;;
        (regenerate-certs)
            _arguments \
                $opts_help \
                '(--force -f)'{--force,-f}'[Force rebuild and do not prompt]' \
                '*:host:__docker-machine_hosts_all' && ret=0
            ;;
        (restart)
            _arguments \
                $opts_help \
                '*:host:__docker-machine_hosts_with_state' && ret=0
            ;;
        (rm)
            _arguments \
                $opts_help \
                '(--force -f)'{--force,-f}'[Remove local configuration even if machine cannot be removed, also implies an automatic yes (`-y`)]' \
                '-y[Assumes automatic yes to proceed with remove, without prompting further user confirmation]' \
                '*:host:__docker-machine_hosts_with_state' && ret=0
            ;;
        (scp)
            _arguments \
                $opts_help \
                '(--recursive -r)'{--recursive,-r}'[Copy files recursively (required to copy directories))]' \
                '*:files:__docker-machine_hosts_and_files' && ret=0
            ;;
        (ssh)
            _arguments \
                $opts_help \
                '*:host:__docker-machine_hosts_running' && ret=0
            ;;
        (start)
            _arguments \
                $opts_help \
                '*:host:__docker-machine_hosts_with_state' && ret=0
            ;;
        (status)
            _arguments $opts_only_host && ret=0
            ;;
        (stop)
            _arguments \
                $opts_help \
                '*:host:__docker-machine_hosts_with_state' && ret=0
            ;;
        (upgrade)
            _arguments $opts_only_host && ret=0
            ;;
        (url)
            _arguments \
                $opts_help \
                '*:host:__docker-machine_hosts_running' && ret=0
            ;;
    esac

    return ret
}


__docker-machine_commands() {
    local cache_policy

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

    if ( [[ ${+_docker_machine_subcommands} -eq 0 ]] || _cache_invalid docker_machine_subcommands) \
        && ! _retrieve_cache docker_machine_subcommands;
    then
        local -a lines
        lines=(${(f)"$(_call_program commands docker-machine 2>&1)"})
        _docker_machine_subcommands=(${${${lines[$((${lines[(i)Commands:]} + 1)),${lines[(I)  *]}]}## #}/$'\t'##/:})
        (( $#_docker_machine_subcommands > 0 )) && _store_cache docker_machine_subcommands _docker_machine_subcommands
    fi
    _describe -t docker-machine-commands "docker-machine command" _docker_machine_subcommands
}

__docker-machine_caching_policy() {
    oldp=( "$1"(Nmh+1) )
    (( $#oldp ))
}

_docker-machine() {
    if [[ $service != docker-machine ]]; then
        _call_function - _$service
        return
    fi

    local curcontext="$curcontext" state line
    integer ret=1
    typeset -A opt_args

    _arguments -C \
        "(- :)"{-h,--help}"[Show help]" \
        "(-D --debug)"{-D,--debug}"[Enable debug mode]" \
        '(-s --storage-path)'{-s,--storage-path}'[Configures storage path]:file:_files' \
        '--tls-ca-cert[CA to verify remotes against]:file:_files' \
        '--tls-ca-key[Private key to generate certificates]:file:_files' \
        '--tls-client-cert[Client cert to use for TLS]:file:_files' \
        '--tls-client-key[Private key used in client TLS auth]:file:_files' \
        '--github-api-token[Token to use for requests to the GitHub API]' \
        '--native-ssh[Use the native (Go-based) SSH implementation.]' \
        '--bugsnag-api-token[Bugsnag API token for crash reporting]' \
        '(- :)'{-v,--version}'[Print the version]' \
        "(-): :->command" \
        "(-)*:: :->option-or-argument" && ret=0

    case $state in
        (command)
            __docker-machine_commands && ret=0
            ;;
        (option-or-argument)
            curcontext=${curcontext%:*:*}:docker-machine-$words[1]:
            __docker-machine_subcommand && ret=0
            ret=0
            ;;
    esac

    return ret
}

_docker-machine "$@"