# Souce bash specific set up,
[[ -f ~/.bashrc ]] && . ~/.bashrc

# Environment.
export EDITOR="nano"
export LANG="en_GB.UTF-8"
export LC_COLLATE="POSIX"	# 'C' causes issues with some applications
# export LC_CTYPE="POSIX"	# Not sure why I set this in the first place...
export LESS="-RMi -PM?f%F:stdin.    --    Page %dt of %D    --    %lt/%L (%Pt\%)$"
export MANPAGER="less -Mis -PM'Page %dt$'"
export PAGER="less"
export PATH="/usr/local/sbin:/usr/sbin:/opt/sbin:/sbin:$PATH"
export VISUAL="$EDITOR"
[[ -x /usr/bin/lesspipe ]] && eval "$(SHELL=/bin/sh lesspipe)"

# Platform specific set up.
_PLATFORM="$(uname -s)"
if [[ "$_PLATFORM" = "Linux" ]]; then
  export I_WANT_A_BROKEN_PS=1
  export LYNX_CFG="$HOME/.lynx.cfg"
  export LYNX_LSS="$HOME/.lynx.lss"
  export MANPATH="$HOME/.local/share/man:$MANPATH"
  hash dircolors >/dev/null 2>&1 && eval "$(dircolors -b ~/.dir_colors)"
elif [[ "$_PLATFORM" = "Darwin" ]]; then
  export LSCOLORS="ExGxdxdxCxDxDxbcacbeae"
  export MANPATH="/opt/local/share/man:$MANPATH"
  export PATH="/opt/local/sbin:/opt/local/bin:$PATH"
else
  echo "${BASH_SOURCE##*/}: unsupported platform: $_PLATFORM" >&2
fi
unset _PLATFORM

# Add bin directories to PATH.
[[ -d "$HOME/files/bin" ]] && export PATH="$HOME/files/bin:$PATH"
[[ -d "$HOME/.local/bin" ]] && export PATH="$HOME/.local/bin:$PATH"
[[ -d "$HOME/bin" ]] && export PATH="$HOME/bin:$PATH"

# Make ssh-agent work better.
hash ssh-add ssh-agent >/dev/null 2>&1 && {
  if [[ -z "$SSH_AUTH_SOCK" ]]; then
    # Try to find an existing agent socket to connect to.
    SSH_AUTH_SOCK="$(_find_agent_sock)"
    if ((${PIPESTATUS[0]} == 0)); then
      # Found a socket.
      export SSH_AUTH_SOCK
      echo "Connected to ssh-agent."
      alias ssh='ssh-add -l >/dev/null 2>&1 && unalias ssh || { ssh-add && unalias ssh; }; ssh'
    else
      # No viable socket - try to start an agent.
      eval "$(ssh-agent -s | grep -v 'echo')"
      ssh-add -l >/dev/null 2>&1
      if (( $? < 2 )); then
        # Agent started - add new socket to the agent sockets file.
        if [[ "$_PLATFORM" == "Linux" ]]; then
          # Linux has 'flock', thankfully.
          if exec 9>~/.ssh/agents.lock && flock -E 10 -w 0.5 9; then
            _GOT_LOCK=1
          else
            echo "$(tput setaf 1 || tput AF 1)Failed to obtain lockfile!$(tput op)"
          fi
        elif [[ "$_PLATFORM" == "Darwin" ]]; then
          # Do locking the sucky way on OSX.
          for ((I=0; I < 5; I++)); do
            if shlock -f "/tmp/agents.lock.$$" -p "$$"; then
              _GOT_LOCK=1
              break
            else
              sleep 0.1
            fi
          done
          [[ "${_GOT_LOCK:-0}" == "0" ]] && echo "$(tput setaf 1 || tput AF 1)Failed to obtain lockfile!$(tput op)"
        else
          echo "$(tput setaf 1 || tput AF 1)File locking unsupported - skipping clean up of agents file!$(tput op)"
        fi
        [[ "$_GOT_LOCK" == "1" ]] && {
          if _push_agent_sock; then
            echo "Started new ssh-agent."
          else
            echo "$(tput setaf 1 || tput AF 1)Started new ssh-agent, but failed to register socket!$(tput op)"
          fi
        }
        if [[ "$_PLATFORM" == "Linux" ]]; then
          exec 9>&-
        elif [[ "$_PLATFORM" == "Darwin" ]]; then
          rm -f "/tmp/agents.lock.$$"
        fi
        alias ssh='ssh-add -l >/dev/null 2>&1 && unalias ssh || { ssh-add && unalias ssh; }; ssh'
      else
        echo "$(tput setaf 1 || tput AF 1)Failed to start new ssh-agent!$(tput op)"
        unset SSH_AGENT_PID SSH_AUTH_SOCK
      fi
    fi
  else
    # Got a forwarded ssh-agent connection.
    export SSH_AUTH_SOCK
    ssh-add -l >/dev/null 2>&1
    if (( $? < 2 )); then
      # Agent is connected - add new socket to the agent sockets file.
      if [[ "$_PLATFORM" == "Linux" ]]; then
        # Linux has 'flock', thankfully.
        if exec 9>~/.ssh/agents.lock && flock -E 10 -w 0.5 9; then
          _GOT_LOCK=1
        else
          echo "$(tput setaf 1 || tput AF 1)Failed to obtain lockfile!$(tput op)"
        fi
      elif [[ "$_PLATFORM" == "Darwin" ]]; then
        # Do locking the sucky way on OSX.
        for ((I=0; I < 5; I++)); do
          if shlock -f "/tmp/agents.lock.$$" -p "$$"; then
            _GOT_LOCK=1
            break
          else
            sleep 0.1
          fi
        done
        [[ "${_GOT_LOCK:-0}" == "0" ]] && echo "$(tput setaf 1 || tput AF 1)Failed to obtain lockfile!$(tput op)"
      else
        echo "$(tput setaf 1 || tput AF 1)File locking unsupported - skipping update of agents file!$(tput op)"
      fi
      [[ "${_GOT_LOCK:-0}" == "1" ]] && {
        if _push_agent_sock; then
          echo "Connected to forwarded ssh-agent."
        else
          echo -e "$(tput setaf 1 || tput AF 1)Failed to register forwarded ssh-agent socket!$(tput op)"
        fi
      }
      if [[ "$_PLATFORM" == "Linux" ]]; then
        exec 9>&-
      elif [[ "$_PLATFORM" == "Darwin" ]]; then
        rm -f "/tmp/agents.lock.$$"
      fi
      alias ssh='ssh-add -l >/dev/null 2>&1 && unalias ssh || { ssh-add && unalias ssh; }; ssh'
    else
      echo -e "$(tput setaf 1 || tput AF 1)Problem connecting to forwarded ssh-agent!$(tput op)"
    fi
  fi
  echo
}
unset I _GOT_LOCK

# Screen.
hash screen >/dev/null 2>&1 && {
  if [[ ! -e ~/.hushlogin ]]; then
    if [[ ! -z "$STY" ]]; then
      echo "Screen $STY, window $WINDOW."
      echo
    else
      _SCREENS="$( screen -ls | grep '[[:alpha:]]' | egrep -v '^([[:digit:]]+|No) Socket(s)?' )"
      if [[ -n "$_SCREENS" ]]; then
        echo "$_SCREENS"
        echo
      else
        echo "No screens."
        echo
      fi
      unset _SCREENS
    fi
  fi
}

# Mail check.
[[ ! -z "$SSH_CONNECTION" ]] && {
  if [[ -s /var/spool/mail/$USER ]]; then
    if [[ -N /var/spool/mail/$USER ]]; then
      echo "You have new mail."
      echo
    else
      echo "You have mail."
      echo
    fi
#  else
#    echo "No mail."
#    echo
  fi
}