#compdef rails
# ------------------------------------------------------------------------------
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# ------------------------------------------------------------------------------
# Description
# -----------
#
#  Completion script for Ruby on Rails (http://rubyonrails.org/).
#
# ------------------------------------------------------------------------------
# Authors
# -------
#
#  * Kazuya Takeshima (https://github.com/mitukiii)
#
# ------------------------------------------------------------------------------


_rails() {
  local context state line curcontext="$curcontext"

  if (( CURRENT > 2 )); then
    (( CURRENT-- ))
    shift words
    _call_function - "_rails_${words[1]}" || _nothing
  else
    __rails_commands
  fi
}

__rails_commands() {
  local context state line curcontext="$curcontext"

  local -a rails_options
  __rails_setup_rails_options

  _arguments -C \
    $rails_options \
    ': :->command'

  case "$state" in
    command)
      local -a commands
      local application_directory
      __rails_setup_application_directory

      if [ -n "$application_directory" ]; then
        commands=(
          {generate,g}'[Generate new code]'
          {console,c}'[Start the Rails console]'
          {server,s}'[Start the Rails server]'
          {dbconsole,db}'[Start a console for the database specified in config/database.yml]'
          application'[Generate the Rails application code]'
          {destroy,d}'[Undo code generated with "generate"]'
          benchmarker'[See how fast a piece of code runs]'
          profiler'[Get profile information from a piece of code]'
          plugin'[Install a plugin]'
          {runner,r}'[Run a piece of code in the application environment]'
          {test,t}'[Run tests]'
        )
      else
        commands=(
          new'[Create a new Rails application]'
        )
      fi

      _values 'command' $commands
      ;;
  esac
}

__rails_setup_application_directory() {
  application_directory="$(pwd)"

  while [ -n "$application_directory" ]; do
    if [ -f "${application_directory}/script/rails" -o -f "${application_directory}/bin/rails" ]; then
      return
    fi
    application_directory="${application_directory%/*}"
  done

  application_directory=
}

__rails_setup_rails_options() {
  rails_options=(
    {-h,--help}'[Show this help message and quit]'
    {-v,--version}'[Show Rails version number and quit]'
  )
}

__rails_setup_runtime_options() {
  runtime_options=(
    '(-f --force)'{-f,--force}'[Overwrite files that already exist]'
    '(-p --pretend)'{-p,--pretend}'[Run but do not make any changes]'
    '(-q --quiet)'{-q,--quiet}'[Suppress status output]'
    '(-s --skip)'{-s,--skip}'[Skip files that already exist]'
  )
}

__rails_setup_generators_options() {
  local -a runtime_options
  __rails_setup_runtime_options

  generators_options=(
    $runtime_options
    --skip-namespace'[Skip namespace (affects only isolated applications)]'
    --old-style-hash"[Force using old style hash (:foo => 'bar') on Ruby >= 1.9]"
  )
}

__rails_setup_model_generators_options() {
  local -a generators_options
  __rails_setup_generators_options

  model_generators_options=(
    $generators_options
    '(-o --orm)'{-o,--orm=}'[Orm to be invoked]:orm'
  )
}

__rails_setup_resource_generators_options() {
  local -a model_generators_options
  __rails_setup_model_generators_options

  resource_generators_options=(
    $model_generators_options
    --force-plural'[Forces the use of a plural ModelName]'
    --resource-route'[Indicates when to generate resource route]: :__rails_boolean'
  )
}

__rails_boolean() {
  _values 'boolean' 'true' 'false'
}

__rails_migration_fields() {
  if compset -P '*:*:'; then
    _values 'index' 'index' 'uniq'
  else
    if compset -P '*:'; then
      _values -s ':' 'type' 'string' 'text' 'integer' 'float' 'decimal' 'datetime' 'timestamp' 'time' 'date' 'binary' 'boolean' 'references'
    else
      _guard '[[:alnum:]_]#' 'field'
    fi
  fi
}

_rails_generate() {
  local context state line curcontext="$curcontext"

  if (( CURRENT > 2 )); then
    (( CURRENT-- ))
    shift words
    _call_function - "_rails_generate_${words[1]}" || _rails_generate_default
  else
    __rails_generate_commands
  fi
}

_rails_g() {
  _rails_generate
}

__rails_generate_commands() {
  local context curcontext="$curcontext" update_policy

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

  local application_directory
  __rails_setup_application_directory
  local cache_name
  cache_name="rails/${application_directory##*/}/all_generators"
  if ! _retrieve_cache ${cache_name}; then
    local -a all_generators
    all_generators=($(_call_program rails_generators rails generate 2> /dev/null | awk '/^  [a-zA-Z_]+/{ print $1 }'))
    _store_cache ${cache_name} all_generators
  fi

  local -a rails_generators
  rails_generators=(${all_generators:#*:*})
  _describe -t rails_generators 'rails generator' rails_generators

  local -a -U namespaces
  local namespace
  local -a generators
  namespaces=(${(R)${(M)all_generators:#*:*}%:*})
  for namespace in $namespaces; do
    generators=(${${(M)all_generators:#${namespace}:*}/:/\\:})
    _describe -t ${namespace}_generators "${namespace/_/ } generator" generators
  done
}

_rails_generate_commands_caching_policy() {
  local application_directory
  __rails_setup_application_directory

  if [ "${application_directory}/Gemfile" -nt "$1" ]; then
    return 0
  fi

  local -a oldp
  oldp=( "$1"(Nmw+1) )
  (( $#oldp ))
}

_rails_generate_default() {
  local -a generators_options
  __rails_setup_generators_options

  _arguments \
    $generators_options \
    '*:argument'
}

_rails_generate_assets() {
  local -a generators_options
  __rails_setup_generators_options

  _arguments \
    $generators_options \
    '(-j --javascripts)'{-j,--javascripts}'[Generate JavaScripts]: :__rails_boolean' \
    '(-y --stylesheets)'{-y,--stylesheets}'[Generate Stylesheets]: :__rails_boolean' \
    '(-je --javascript-engine)'{-je,--javascript-engine=}'[Engine for JavaScripts]:javascript engine' \
    '(-se --stylesheet-engine)'{-se,--stylesheet-engine=}'[Engine for Stylesheets]:stylesheet engine' \
    ': :_guard "^-*" "name"'
}

_rails_generate_controller() {
  local -a generators_options
  __rails_setup_generators_options

  _arguments \
    $generators_options \
    '(-e --template-engine)'{-e,--template-engine=}'[Template engine to be invoked]:template engine' \
    '(-t --test-framework)'{-t,--test-framework=}'[Test framework to be invoked]:test framework' \
    --helper'[Indicates when to generate helper]: :__rails_boolean' \
    --assets'[Indicates when to generate assets]: :__rails_boolean' \
    ': :_guard "^-*" "name"' \
    '*: :_guard "^-*" "action"'
}

_rails_generate_generator() {
  local -a generators_options
  __rails_setup_generators_options

  _arguments \
    $generators_options \
    --namespace'[Namespace generator under lib/generators/name]: :__rails_boolean' \
    ': :_guard "^-*" "name"'
}

_rails_generate_helper() {
  local -a generators_options
  __rails_setup_generators_options

  _arguments \
    $generators_options \
    '(-t --test-framework)'{-t,--test-framework=}'[Test framework to be invoked]:test framework' \
    ': :_guard "^-*" "name"' \
}

_rails_generate_integration_test() {
  local -a generators_options
  __rails_setup_generators_options

  _arguments \
    $generators_options \
    --integration-tool='[Integration tool to be invoke]:integration tool' \
    ': :_guard "^-*" "name"' \
}

_rails_generate_jbuilder() {
  local -a generators_options
  __rails_setup_generators_options

  _arguments \
    $generators_options \
    ': :_guard "^-*" "name"' \
    '*: :__rails_migration_fields'
}

_rails_generate_mailer() {
  local -a generators_options
  __rails_setup_generators_options

  _arguments \
    $generators_options \
    '(-e --template-engine)'{-e,--template-engine=}'[Template engine to be invoked]:template engine' \
    '(-t --test-framework)'{-t,--test-framework=}'[Test framework to be invoked]:test framework' \
    ': :_guard "^-*" "name"' \
    '*: :_guard "^-*" "method"'
}

_rails_generate_migration() {
  local -a modelgenerators_options
  __rails_setup_model_generators_options

  _arguments \
    $model_generators_options \
    ': :_guard "^-*" "name"' \
    '*: :__rails_migration_fields'
}

_rails_generate_model() {
  _rails_generate_migration
}

_rails_generate_observer() {
  local -a model_generators_options
  __rails_setup_model_generators_options

  _arguments \
    $model_generators_options \
    ': :_guard "^-*" "name"'
}

_rails_generate_performance_test() {
  local -a generators_options
  __rails_setup_generators_options

  _arguments \
    $generators_options \
    --performance-tool='[Performance tool to be invoked]:performance tool' \
    ': :_guard "^-*" "name"' \
}

_rails_generate_resource() {
  local context state line curcontext="$curcontext"

  local -a resource_generators_options
  __rails_setup_resource_generators_options

  _arguments -C \
    $resource_generators_options \
    '(-c --resource-controller)'{-c,--resource-controller=}'[Resource controller to be invoked]:name' \
    '(-a --actions)'{-a,--actions=}'[Actions for the resource controller]: :->actions' \
    ': :->name' \
    '*: :->fields'

  if (( words[(I)(--actions=*|-a)] > 0 && words[(I)(--actions=*|-a)] == words[(I)-*] )); then
    state=actions
  fi

  case "$state" in
    actions)
      _guard "[[:alnum:]_]#" "actions"
      ;;
    name)
      _guard "^-*" "name"
      ;;
    fields)
      __rails_migration_fields
      ;;
  esac
}

_rails_generate_scaffold() {
  local -a resource_generators_options
  __rails_setup_resource_generators_options

  _arguments \
    $resource_generators_options \
    '(-y --stylesheets)'{-y,--stylesheets}'[Generate Stylesheets]: :__rails_boolean' \
    '(-se --stylesheet-engine)'{-se,--stylesheet-engine=}'[Engine for Stylesheets]:stylesheet engine' \
    '(-c --scaffold-controller)'{-c,--scaffold-controller=}'[Scaffold controller to be invoked]:name' \
    --assets'[Indicates when to generate assets]:boolean:(true false)' \
    ': :_guard "^-*" "name"' \
    '*: :__rails_migration_fields'
}

_rails_generate_scaffold_controller() {
  local -a model_generators_options
  __rails_setup_model_generators_options

  _arguments \
    $model_generators_options \
    '(-e --template-engine)'{-e,--template-engine=}'[Template engine to be invoked]:template engine' \
    '(-t --test-framework)'{-t,--test-framework=}'[Test framework to be invoked]:test framework' \
      --helper'[Indicates when to generate helper]: :__rails_boolean' \
    ': :_guard "^-*" "name"'
}

_rails_generate_session_migration() {
  local -a model_generators_options
  __rails_setup_model_generators_options

  _arguments \
    $model_generators_options \
    ': :_guard "^-*" "name"'
}

_rails_generate_task() {
  local -a generators_options
  __rails_setup_generators_options

  _arguments \
    $generators_options \
    ': :_guard "^-*" "name"' \
    '*: :_guard "^-*" "action"'
}

_rails_console() {
  _arguments \
    '(- *)'{-h,--help}'[Show this help message]' \
    '(-s --sandbox)'{-s,--sandbox}'[Rollback database modifications on exit]' \
    --debugger'[Enable ruby-debugging for the console]'
}

_rails_c() {
  _rails_console
}

_rails_server() {
  _arguments \
    '(- *)'{-h,--help}'[Show this help message]' \
    '(-p --port)'{-p,--port=}'[Runs Rails on the specified port]: :_guard "[[\:digit\:]]#" "port"' \
    '(-b --binding)'{-b,--binding=}'[Binds Rails to the specified ip]:ip:_hosts' \
    '(-c --config)'{-c,--config=}'[Use custom rackup configuration file]:file:_files -g "*.ru"' \
    '(-d --daemon)'{-d,--daemon}'[Make server run as a Daemon]' \
    '(-u --debugger)'{-u,--debugger}'[Enable ruby-debugging for the server]' \
    '(-e --environment)'{-e,--environment=}'[Specifies the environment to run this server under (test/development/production)]:name:(test development production)' \
    '(-P --pid)'{-P,--pid=}'[Specifies the PID file]:pid:_files -g "*.pid"'
}

_rails_s() {
  _rails_server
}

_rails_dbconsole() {
  _arguments \
    '(- *)'--help'[Show this help message]' \
    '(-p --include-password)'{-p,--include-password}'[Automatically provide the password from database.yml]' \
    --mode'[Automatically put the sqlite3 database in the specified mode (html, list, line, column)]:mode:(html list line column)' \
    --header
}

_rails_new() {
  local context state line curcontext="$curcontext"

  local _a rails_options runtime_options
  __rails_setup_rails_options
  __rails_setup_runtime_options

  _arguments -C \
    $rails_options \
    $runtime_options \
    '(-r --ruby)'{-r,--ruby=}'[Path to the Ruby binary of your choice]:path' \
    '(-b --builder)'{-b,--builder=}'[Path to a application builder (can be a filesystem path or URL)]: :->path_or_url' \
    '(-m --template)'{-m,--template=}'[Path to an application template (can be a filesystem path or URL)]: :->path_or_url' \
    --skip-gemfile"[Don't create a Gemfile]" \
    --skip-bundle"[Don't run bundle install]" \
    '(-G --skip-git)'{-G,--skip-git}'[Skip Git ignores and keeps]' \
    '(-O --skip-active-record)'{-O,--skip-active-record}'[Skip Active Record files]' \
    '(-S --skip-sprockets)'{-S,--skip-sprockets}'[Skip Sprockets files]' \
    '(-d --database)'{-d,--database=}'[Preconfigure for selected database]:database:(mysql oracle postgresql sqlite3 frontbase ibm_db sqlserver jdbcmysql jdbcsqlite3 jdbcpostgresql jdbc)' \
    '(-j --javascript)'{-j,--javascript=}'[Preconfigure for selected JavaScript library]:javascript' \
    '(-J --skip-javascript)'{-J,--skip-javascript}'[Skip JavaScript files]' \
    --dev'[Setup the application with Gemfile pointing to your Rails checkout]' \
    --edge'[Setup the application with Gemfile pointing to Rails repository]' \
    '(-T --skip-test-unit)'{-T,--skip-test-unit}'[Skip Test::Unit files]' \
    --old-style-hash"[Force using old style hash (:foo => 'bar') on Ruby >= 1.9]" \
    ':app path:_directories'

  case "$state" in
    path_or_url)
      _alternative \
        'files:path:_files -g "*.rb"' \
        'url:url:_urls'
      ;;
  esac
}

_rails_application() {
  _rails_new
}

_rails_db() {
  _rails_dbconsole
}

_rails_destroy() {
  _rails_generate
}

_rails_d() {
  _rails_destroy
}

_rails_benchmarker() {
  _arguments \
    '(- *)'{-h,--help}'[Show this help message]' \
    '(-r --runs)'{-r,--runs}'[Number of runs]: :_guard "[[\:digit\:]]#" "number"' \
    '(-o --output)'{-o,--output}'[Directory to use when writing the results]:directory:_directories' \
    '(-m --metrics)'{-m,--metrics}'[Metrics to use]: :_values -s "," "metrics" "wall_time" "memory" "objects" "gc_runs" "gc_time"' \
    '*: :_guard "^-*" "ruby code"'
}

_rails_profiler() {
  _arguments \
    '(- *)'{-h,--help}'[Show this help message]' \
    '(-r --runs)'{-r,--runs}'[Number of runs]: :_guard "[[\:digit\:]]#" "number"' \
    '(-o --output)'{-o,--output}'[Directory to use when writing the results]:directory:_directories' \
    '(-m --metrics)'{-m,--metrics}'[Metrics to use]: :_values -s "," "metrics" "process_time" "memory" "objects"' \
    '(-f --formats)'{-f,--formats}'[Formats to output to]: :_values -s "," "formats" "flat" "graph" "html" "call_tree" "call_stack"' \
    '*: :_guard "^-*" "ruby code"'
}

_rails_plugin() {
  local context state line curcontext="$curcontext"

  if (( CURRENT > 2 )); then
    (( CURRENT-- ))
    shift words
    _call_function - "_rails_plugin_${words[1]}" || _nothing
  else
    __rails_plugin_commands
  fi
}

__rails_plugin_commands() {
  _values 'plugin command' \
    install'[Install plugin(s) from known repositories or URLs]' \
    remove'[Uninstall plugins]' \
    new
}

_rails_plugin_install() {
  _arguments \
    '(-x --externals)'{-x,--externals}'[Use svn:externals to grab the plugin. Enables plugin updates and plugin versioning]' \
    '(-o --checkout)'{-o,--checkout}'[Use svn checkout to grab the plugin. Enables updating but does not add a svn:externals entry]' \
    '(-e --export)'{-e,--export}'[Use svn export to grab the plugin. Exports the plugin, allowing you to check it into your local repository. Does not enable updates or add an svn:externals entry]' \
    '(-q --quiet)'{-q,--quiet}'[Suppresses the output from installation. Ignored if -v is passed (rails plugin -v install ...)]' \
    '(-r --revision)'{-r,--revision=}'[Checks out the given revision from subversion or git. Ignored if subversion/git is not used]:revision' \
    '(-f --force)'{-f,--force}"[Reinstalls a plugin if it's already installed]" \
    '*:plugin:_urls'
}

_rails_plugin_remove() {
  local -a plugins

  plugins=($(_call_program rails_plugins ls -1 vendor/plugins))

  _describe -t plugins 'plugin' plugins
}

_rails_plugin_new() {
  _rails_new
}

_rails_runner() {
  local context state line curcontext="$curcontext"

  _arguments -C \
    '(- *)'{-h,--help}'[Show this help message]' \
    '(-e --environment)'{-e,--environment=}'[Specifies the environment for the runner to operate under (test/development/production)]:name:(test development production)' \
    ': :->code_or_path'

  case "$state" in
    code_or_path)
      _alternative \
        'files:filename:_files -g "*.rb"' \
        'codes:ruby code:_guard "^-*" "ruby code"'
      ;;
  esac
}

_rails_r() {
  _rails_runner
}

_rails_test() {
  local context state line curcontext="$curcontext"

  _arguments -C \
    ': :->path'

  case "$state" in
    path)
      _alternative \
        'files:filename:_files -g "*.rb"'
      ;;
  esac
}

_rails_t() {
  _rails_test
}

_rails "$@"

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