# shellcheck shell=bash
# ==========================================================================
#         ____            _                     _____           _
#        / ___| _   _ ___| |_ ___ _ __ ___     |_   _|__   ___ | |___
#        \___ \| | | / __| __/ _ \ '_ ` _ \ _____| |/ _ \ / _ \| / __|
#         ___) | |_| \__ \ ||  __/ | | | | |_____| | (_) | (_) | \__ \
#        |____/ \__, |___/\__\___|_| |_| |_|     |_|\___/ \___/|_|___/
#               |___/
#                             --- System-Tools ---
#                  https://www.nntb.no/~dreibh/system-tools/
# ==========================================================================
#
# Unix Timestamp to Time Conversion
# Copyright (C) 2026 by Thomas Dreibholz
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Contact: thomas.dreibholz@gmail.com


# ###### Bash completion for unixts2time ####################################
_unixts2time()
{
   # Based on: https://www.benningtons.net/index.php/bash-completion/
   local cur prev words cword
   if type -t _comp_initialize >/dev/null; then
      _comp_initialize || return
   elif type -t _init_completion >/dev/null; then
      _init_completion || return
   else
      # Manual initialization for older bash completion versions:
      COMPREPLY=()
      cur="${COMP_WORDS[COMP_CWORD]}"
      # shellcheck disable=SC2034
      prev="${COMP_WORDS[COMP_CWORD-1]}"
      # shellcheck disable=SC2034,SC2124
      words="${COMP_WORDS[@]}"
      # shellcheck disable=SC2034
      cword="${COMP_CWORD}"
   fi

   # ====== Suggest time stamps as first parameter ==========================
   if [[ "${cur}" != -* ]] ; then
      local today
      # Suggested time stamp: today, 12:34:56.* in s, ms, µs, and ns.
      today="$(date +%s)"
      today="$(( ((today / 86400) * 86400) + (12*3600) + (34*60) + 56 ))"
      local timestampOptions=( "${today}" "${today}.789" "${today}111" "${today}222333" "${today}444555666" )

      compopt -o nosort 2>/dev/null || true   # No sorting (Bash >= 4.4)
      COMPREPLY=()
      for item in "${timestampOptions[@]}"; do
         if [[ "${item}" == "${cur}"* ]] ; then
            COMPREPLY+=( "${item}" )
         fi
      done
      return
   fi

   # ====== All options =====================================================
   local opts="
-H
--human-readable
-s
--seconds
-m
--milliseconds
-u
--microseconds
-n
--nanoseconds
-h
--help
-v
--version
--
"
   mapfile -t COMPREPLY < <(compgen -W "${opts}" -- "${cur}" )
   return 0
}

complete -F _unixts2time unixts2time
