# copy this into ~/.config/fish/completions/ to enable autocomplete for the watson time tracker

function __fish_watson_needs_sub -d "provides a list of sub commands"
  set cmd (commandline -opc)
  if [ (count $cmd) -eq 1 -a $cmd[1] = 'watson' ]
    return 0
  end
  return 1
end

function __fish_watson_using_command -d "determine if watson is using the passed command"
  set cmd (commandline -opc)
  if [ (count $cmd) -ge 2 -a $cmd[1] = 'watson' ]
    if [ $argv[1] = $cmd[2] ]
      return 0
    end
    return 1
  end
  return 1
end

function __fish_watson_set_cache_vars -d "set vars used for caches"
  if test -n "$WATSON_DIR"
    set -g _watson_dir $WATSON_DIR
  else
    # TODO: set dir for Darwin (not sure how to do regex in fish) #
    set -g _watson_dir "$HOME/.config/watson"
  end
  set -g _watson_frame_file "$_watson_dir/frames"
  set -g _watson_projects_cache "$_watson_dir/projects_cache"
  set -g _watson_tags_cache "$_watson_dir/tags_cache"
  set -g _watson_frames_cache "$_watson_dir/frames_cache"
end

function __get_date_num -d "return last modified time of file"
	date -r $argv[1] +%s
end

function __fish_watson_check_if_refresh_cache -d "see if cache file needs refreshing"
  if begin not test -e $argv[1];
    or test (__get_date_num $_watson_frame_file) \
    -gt (__get_date_num $argv[1]); end
    return 1
  else
    return 0
  end
end

function __fish_watson_get_projects -d "return a list of projects"
  __fish_watson_set_cache_vars
  __fish_watson_check_if_refresh_cache $_watson_projects_cache
  # if test $status -eq 1
    # command watson projects | tee $_watson_projects_cache
  # else
    # cat $_watson_projects_cache
  # end
  cat $_watson_projects_cache
end

function __fish_watson_get_tags -d "return a list of tags"
  __fish_watson_set_cache_vars
  __fish_watson_check_if_refresh_cache $_watson_tags_cache
  # if test $status -eq 1
    # command watson tags | tee $_watson_tags_cache
  # else
    # cat $_watson_tags_cache
  # end
  cat $_watson_tags_cache
end

function __fish_watson_get_frames -d "return a list of frames" #TODO, use watson logs to get more info
  __fish_watson_set_cache_vars
  __fish_watson_check_if_refresh_cache $_watson_frames_cache
  if test $status -eq 1
    command watson frames | tee $_watson_frames_cache
  else
    cat $_watson_frames_cache
  end
end

function __fish_watson_has_project -d "determine if watson is using a passed command and if it has a project"
  set cmd (commandline -opc)
  if [ (count $cmd) -gt 2 -a $cmd[1] = 'watson' ]
    if [ $argv[1] = $cmd[2] ]
      if contains "$cmd[3]" (__fish_watson_get_projects)
        return 0
      end
    end
  end
  return 1
end

function __fish_watson_has_from -d "determine if watson is using a passed command and if it is using from"
  set cmd (commandline -opc)
  if [ (count $cmd) -gt 2 -a $cmd[1] = 'watson' ]
    if [ $argv[1] = $cmd[2] ]
      if contains -- "$cmd[3]" -f --from
        return 0
      end
    end
  end
  return 1
end

function __fish_watson_needs_project -d "check if we need a project"
  set cmd (commandline -opc)
  if [ (count $cmd) -ge 2 -a $cmd[1] = 'watson' ]
    if [ $argv[1] = $cmd[2] ]
      for i in $cmd
        if contains $i (__fish_watson_get_projects)
          return 1 # return 1 because we alredy have a project
        end
      end
      return 0 # we are using $argv as our command and the command does not contain any projects
    end
  end
  return 1
end

# if a backend.url is set, use it in the command description
if [ -e ~/.config/watson/config ]
  set url_string (command watson config backend.url 2> /dev/null)
  if test -n "$url_string"
    set url $url_string
  end
else
  set url "a remote Crick server"
end

# ungrouped
complete -f -c watson -n '__fish_watson_needs_sub' -a cancel -d "Cancel the last start command"
complete -f -c watson -n '__fish_watson_needs_sub' -a stop -d " Stop monitoring time for the current project"
complete -f -c watson -n '__fish_watson_needs_sub' -a frames -d "Display the list of all frame IDs"
complete -f -c watson -n '__fish_watson_needs_sub' -a help -d "Display help information"
complete -f -c watson -n '__fish_watson_needs_sub' -a projects -d "Display the list of projects"
complete -f -c watson -n '__fish_watson_needs_sub' -a tags -d "Display the list of tags"
complete -f -c watson -n '__fish_watson_needs_sub' -a sync -d "sync your work with $url"

# config
complete -f -c watson -n '__fish_watson_needs_sub' -a config -d "Get and set configuration options"
complete -f -c watson -n '__fish_watson_using_command config' -s e -l edit -d "Edit the config with an editor"

# edit
complete -f -c watson -n '__fish_watson_needs_sub' -a edit -d "Edit a frame"
complete -f -c watson -n '__fish_watson_using_command edit' -a "(__fish_watson_get_frames)"

# log
complete -f -c watson -n '__fish_watson_needs_sub' -a log -d "Display sessions during the given timespan"
complete -f -c watson -n '__fish_watson_using_command log' -s c -l current -d "include the running frame"
complete -f -c watson -n '__fish_watson_using_command log' -s C -l no-current -d "exclude the running frame (default)"
complete -f -c watson -n '__fish_watson_using_command log' -s f -l from -d "Start date for log"
complete -f -c watson -n '__fish_watson_has_from log' -s t -l to -d "end date for log"
complete -f -c watson -n '__fish_watson_using_command log' -s y -l year -d "show the last year"
complete -f -c watson -n '__fish_watson_using_command log' -s m -l month -d "show the last month"
complete -f -c watson -n '__fish_watson_using_command log' -s w -l week -d "show week-to-day"
complete -f -c watson -n '__fish_watson_using_command log' -s d -l day -d "show today"
complete -f -c watson -n '__fish_watson_using_command log' -s a -l all -d "show all"
complete -f -c watson -n '__fish_watson_using_command log' -s p -l project -d "restrict to project" -a "(__fish_watson_get_projects)"
complete -f -c watson -n '__fish_watson_using_command log' -s T -l tag -d "restrict to tag" -a "(__fish_watson_get_tags)"
complete -f -c watson -n '__fish_watson_using_command log' -s j -l json -d "output json"
complete -f -c watson -n '__fish_watson_using_command log' -s g -l pager -d "view through pager"
complete -f -c watson -n '__fish_watson_using_command log' -s G -l no-pager -d "don't vew through pager"

# merge
complete -f -c watson -n '__fish_watson_needs_sub' -a merge -d "merge existing frames with conflicting ones"
complete -f -c watson -n '__fish_watson_using_command merge' -s f -l force -d "silently merge"

# remove
complete -f -c watson -n '__fish_watson_needs_sub' -a remove -d "Remove a frame"
complete -f -c watson -n '__fish_watson_using_command remove' -a "(__fish_watson_get_frames)"
complete -f -c watson -n '__fish_watson_using_command remove' -s f -l force -d "silently remove"

# rename
complete -f -c watson -n '__fish_watson_needs_sub' -a rename -d "Rename a project or tag"
complete -f -c watson -n '__fish_watson_using_command rename' -a "(__fish_watson_get_projects) (__fish_watson_get_tags)"

# report
complete -f -c watson -n '__fish_watson_needs_sub' -a report -d "Display a report of time spent"
complete -f -c watson -n '__fish_watson_using_command report' -s c -l current -d "include the running frame"
complete -f -c watson -n '__fish_watson_using_command report' -s C -l no-current -d "exclude the running frame (default)"
complete -f -c watson -n '__fish_watson_using_command report' -s f -l from -d "Start date for report"
complete -f -c watson -n '__fish_watson_has_from report' -s t -l to -d "end date for report"
complete -f -c watson -n '__fish_watson_using_command report' -s y -l year -d "show the last year"
complete -f -c watson -n '__fish_watson_using_command report' -s m -l month -d "show the last month"
complete -f -c watson -n '__fish_watson_using_command report' -s w -l week -d "show week-to-day"
complete -f -c watson -n '__fish_watson_using_command report' -s d -l day -d "show today"
complete -f -c watson -n '__fish_watson_using_command report' -s a -l all -d "show all"
complete -f -c watson -n '__fish_watson_using_command report' -s p -l project -d "restrict to project" -a "(__fish_watson_get_projects)"
complete -f -c watson -n '__fish_watson_using_command report' -s T -l tag -d "restrict to tag" -a "(__fish_watson_get_tags)"
complete -f -c watson -n '__fish_watson_using_command report' -s j -l json -d "output json"
complete -f -c watson -n '__fish_watson_using_command report' -s g -l pager -d "view through pager"
complete -f -c watson -n '__fish_watson_using_command report' -s G -l no-pager -d "don't vew through pager"

complete -f -c watson -n '__fish_watson_needs_sub' -a restart -d "Restart monitoring time for a stopped project"
complete -f -c watson -n '__fish_watson_using_command restart' -s s -l stop -d "stop running project"
complete -f -c watson -n '__fish_watson_using_command restart' -s S -l no-stop -d "do not stop running project"
complete -f -c watson -n '__fish_watson_using_command restart' -a "(__fish_watson_get_frames)"

# start
complete -f -c watson -n '__fish_watson_needs_sub' -a start -d "Start monitoring time for a project"
complete -f -c watson -n '__fish_watson_needs_project start' -a "(__fish_watson_get_projects)"
complete -f -c watson -n '__fish_watson_has_project start' -a "+(__fish_watson_get_tags)"

# status
complete -f -c watson -n '__fish_watson_needs_sub' -a status -d "Display when the current project was started and time spent"
complete -f -c watson -n '__fish_watson_using_command status' -s p -l project -d "only show project"
complete -f -c watson -n '__fish_watson_using_command status' -s t -l tags -d "only show tags"
complete -f -c watson -n '__fish_watson_using_command status' -s e -l elapsed -d "only show elapsed time"