#!/bin/zsh
  
  # Each line in this string has the following entries separated by a space
  # character.

  # <repo-url>, <plugin-location>, <bundle-type>

  # FIXME: Is not kept local by zsh!

  local _ANTIGEN_BUNDLE_RECORD=""

  
  # Syntaxes

  #   bundle <url> [<loc>=/]

  bundle () {
  
      # Bundle spec arguments' default values.
      local url="$ANTIGEN_DEFAULT_REPO_URL"
      local loc=/

      local btype=plugin

  
      # Set spec values based on the positional arguments.

      local position_args='url loc'

      local i=1
      while ! [[ -z $1 || $1 == --*=* ]]; do

          local arg_name="$(echo "$position_args" | cut -d\  -f$i)"
          local arg_value="$1"

          eval "local $arg_name='$arg_value'"
          shift
          i=$(($i + 1))
      done

      # Check if url is just the plugin name. Super short syntax.
      if [[ "$url" != */* ]]; then
          loc="plugins/$url"
          url="$ANTIGEN_DEFAULT_REPO_URL"
      fi

      # Set spec values from keyword arguments, if any. The remaining arguments
      # are all assumed to be keyword arguments.
      while [[ $1 == --*=* ]]; do

          local arg_name="$(echo "$1" | cut -d= -f1 | sed 's/^--//')"
          local arg_value="$(echo "$1" | cut -d= -f2)"

          eval "local $arg_name='$arg_value'"
          shift
      done
  
      # Resolve the url.
      if [[ $url != git://* && $url != https://* ]]; then

          url="${url%.git}"

          url="https://github.com/$url.git"

      fi

      # Add it to the record.

      _ANTIGEN_BUNDLE_RECORD="$_ANTIGEN_BUNDLE_RECORD
  $url $loc $btype"
  
      -antigen-ensure-repo "$url"

      bundle-load "$url" "$loc" "$btype"

  }

  -antigen-get-clone-dir () {
      # Takes a repo url and gives out the path that this url needs to be cloned
      # to. Doesn't actually clone anything.
      # TODO: Memoize?
      echo -n $ADOTDIR/repos/
      echo "$1" | sed \
          -e 's/\.git$//' \
          -e 's./.-SLASH-.g' \
          -e 's.:.-COLON-.g'

  }

  -antigen-get-clone-url () {
      # Takes a repo's clone dir and gives out the repo's original url that was
      # used to create the given directory path.
      # TODO: Memoize?
      echo "$1" | sed \
          -e "s:^$ADOTDIR/repos/::" \
          -e 's/$/.git/' \
          -e 's.-SLASH-./.g' \
          -e 's.-COLON-.:.g'
  }

  -antigen-ensure-repo () {
  
      local update=false
      if [[ $1 == --update ]]; then
          update=true
          shift
      fi
  
      local handled_repos=""
      local install_bundles=""
  
      local url="$1"

      local clone_dir="$(-antigen-get-clone-dir $url)"

  
      if ! echo "$handled_repos" | grep -Fqm1 "$url"; then
          if [[ ! -d $clone_dir ]]; then
              git clone "$url" "$clone_dir"
          elif $update; then
              git --git-dir "$clone_dir/.git" pull
          fi
  
          handled_repos="$handled_repos
  $url"
      fi

  }

  bundle-update () {
      # Update your bundles, i.e., `git pull` in all the plugin repos.
      -bundle-echo-record | awk '{print $1}' | sort -u | while read url; do
          -antigen-ensure-repo --update "$url"
      done
  }

  bundle-load () {

      local url="$1"
      local location="$(-antigen-get-clone-dir "$url")/$2"
      local btype="$3"

      if [[ $btype == theme ]]; then

          # Of course, if its a theme, the location would point to the script
          # file.
          source "$location"

      else

          # Source the plugin script
          # FIXME: I don't know. Looks very very ugly. Needs a better
          # implementation once tests are ready.
          local script_loc="$(ls "$location" | grep -m1 '.plugin.zsh$')"
          if [[ -f $script_loc ]]; then
              # If we have a `*.plugin.zsh`, source it.
              source "$script_loc"
          elif [[ ! -z "$(ls "$location" | grep -m1 '.zsh$')" ]]; then
              # If there is no `*.plugin.zsh` file, source *all* the `*.zsh`
              # files.
              for script ($location/*.zsh) source "$script"
          fi
  
          # Add to $fpath, for completion(s)
          fpath=($location $fpath)
  
      fi

  }

  bundle-cleanup () {
  
      if [[ ! -d "$ADOTDIR/repos" || -z "$(ls "$ADOTDIR/repos/")" ]]; then
          echo "You don't have any bundles."
          return 0
      fi
  
      # Find directores in ADOTDIR/repos, that are not in the bundles record.
      local unused_clones="$(comm -13 \
          <(-bundle-echo-record | awk '{print $1}' | sort -u) \
          <(ls "$ADOTDIR/repos" | while read line; do
                  -antigen-get-clone-url "$line"
              done))"
  
      if [[ -z $unused_clones ]]; then
          echo "You don't have any unidentified bundles."
          return 0
      fi
  
      echo 'You have clones for the following repos, but are not used.'
      echo "$unused_clones" | sed 's/^/  /'
  
      echo -n '
  Delete them all? [y/N] '
      if read -q; then
          echo
          echo
          echo "$unused_clones" | while read url; do
              echo -n "Deleting clone for $url..."
              rm -rf "$(-antigen-get-clone-dir $url)"
              echo ' done.'
          done
      else
          echo
          echo Nothing deleted.
      fi
  }

  bundle-lib () {

      bundle --loc=lib

  }
  
  bundle-theme () {
      local url="$ANTIGEN_DEFAULT_REPO_URL"
      local name="${1:-robbyrussell}"

      bundle --loc=themes/$name.zsh-theme --btype=theme

  }

  bundle-apply () {

      # Initialize completion.

      # TODO: Only load completions if there are any changes to the bundle
      # repositories.

      compinit -i
  }

  bundle-list () {
      # List all currently installed bundles

      if [[ -z "$_ANTIGEN_BUNDLE_RECORD" ]]; then

          echo "You don't have any bundles." >&2
          return 1
      else

          -bundle-echo-record | awk '{print $1 " " $2 " " $3}'

      fi
  }

  # Echo the bundle specs as in the record. The first line is not echoed since it
  # is a blank line.

  -bundle-echo-record () {

      echo "$_ANTIGEN_BUNDLE_RECORD" | sed -n '1!p'

  }
  
  -bundle-env-setup () {

      # Pre-startup initializations

      -set-default ANTIGEN_DEFAULT_REPO_URL \
          https://github.com/robbyrussell/oh-my-zsh.git

      -set-default ADOTDIR $HOME/.antigen

  
      # Load the compinit module
      autoload -U compinit
  
      # Without the following, `compdef` function is not defined.
      compinit -i

  }
  
  # Same as `export $1=$2`, but will only happen if the name specified by `$1` is
  # not already set.
  -set-default () {

      local arg_name="$1"
      local arg_value="$2"

      eval "test -z \"\$$arg_name\" && export $arg_name='$arg_value'"
  }
  
  -bundle-env-setup