# set up
if [ ! -d "${HOME}/.zsh/completion" ]; then
  mkdir -p "${HOME}/.zsh/completion"

  echo 'Downloading completions'
  curl -L https://raw.githubusercontent.com/docker/compose/1.23.1/contrib/completion/zsh/_docker-compose > ${HOME}/.zsh/completion/_docker-compose
  curl -L https://raw.githubusercontent.com/docker/cli/18.09/contrib/completion/zsh/_docker > ${HOME}/.zsh/completion/_docker
fi

fpath=(${HOME}/.zsh/completion $fpath)

# make autocompletion faster by caching
autoload -Uz compinit

compinit -d "$HOME/.zsh/cache/zcompdump"

zstyle ':completion:*' use-cache on
zstyle ':completion:*' cache-path $HOME/.zsh/cache

# use menu
zstyle ':completion:*' menu select

# enable approximate autocompletion
zstyle ':completion:*' completer _complete _match _approximate
zstyle ':completion:*:match:*' original only
# zstyle ':completion:*:approximate:*' max-errors 1 numeric
# zstyle -e ':completion:*:approximate:*' max-errors 'reply=($((($#PREFIX+$#SUFFIX)/3)) numeric)'

# Smart matching of dashed values, e.g. f-b matching foo-bar
zstyle ':completion:*' matcher-list 'r:|[._-]=* r:|=*'

# Group results by category
zstyle ':completion:*' group-name ''

# Keep directories and files separated
zstyle ':completion:*' list-dirs-first true

# Don't try parent path completion if the directories exist
zstyle ':completion:*' accept-exact-dirs true

zstyle ':completion:*' squeeze-slashes true

# Always use menu selection for `cd -`
zstyle ':completion:*:*:cd:*:directory-stack' force-list always
zstyle ':completion:*:*:cd:*:directory-stack' menu yes select

# ignore completion functions for commands you don't have
zstyle ':completion:*:functions' ignored-patterns '(_*|pre(cmd|exec)|TRAP*)'

# Prettier completion for processes
zstyle ':completion:*:*:*:*:processes' force-list always
zstyle ':completion:*:*:*:*:processes' menu yes select
zstyle ':completion:*:*:*:*:processes' list-colors '=(#b) #([0-9]#) ([0-9a-z-]#)*=01;34=0=01'
zstyle ':completion:*:*:*:*:processes' command "ps -u $USER -o pid,user,args -w -w"

zstyle ':filter-select:highlight' matched fg=red
zstyle ':filter-select' max-lines 10
zstyle ':filter-select' rotate-list yes
zstyle ':filter-select' case-insensitive yes # enable case-insensitive search

# Use ls-colors for path completions
function _set-list-colors() {
  zstyle ':completion:*' list-colors ${(s.:.)LS_COLORS}
  unfunction _set-list-colors
}
sched 0 _set-list-colors  # deferred since LC_COLORS might not be available yet