# terax-shell-integration (bashrc)
#
# Differences vs zsh integration:
# - We emulate login-shell init manually (/etc/profile, profile files) because
#   bash ignores --rcfile when started with -l.
# - Pre-exec marker uses PS0 (bash 4.4+). On older bash (macOS default 3.2) we
#   skip it — a fragile DEBUG-trap alternative would clobber the user's own
#   traps and interact badly with debuggers.

if [ -z "$__TERAX_HOOKS_LOADED" ]; then
  __TERAX_HOOKS_LOADED=1

  [ -f /etc/profile ] && source /etc/profile
  [ -f /etc/bashrc ] && source /etc/bashrc
  if [ -f "$HOME/.bash_profile" ]; then
    source "$HOME/.bash_profile"
  elif [ -f "$HOME/.bash_login" ]; then
    source "$HOME/.bash_login"
  elif [ -f "$HOME/.profile" ]; then
    source "$HOME/.profile"
  fi
  # .bashrc may have been sourced already by .bash_profile; sourcing again is
  # safe for idempotent rc files (the common case). If yours has side effects
  # on reload, guard with a flag.
  [ -f "$HOME/.bashrc" ] && source "$HOME/.bashrc"

  _terax_urlencode() {
    local LC_ALL=C s="$1" i c
    for (( i=0; i<${#s}; i++ )); do
      c="${s:i:1}"
      case "$c" in
        [a-zA-Z0-9/._~-]) printf '%s' "$c" ;;
        *) printf '%%%02X' "'$c" ;;
      esac
    done
  }

  _terax_precmd() {
    local _terax_ret=$?
    printf '\e]133;D;%s\e\\' "$_terax_ret"
    printf '\e]7;file://%s%s\e\\' "${HOSTNAME:-$(uname -n 2>/dev/null)}" "$(_terax_urlencode "$PWD")"
    if [ -z "$__TERAX_PS1_INJECTED" ]; then
      PS1='\[\e]133;B\e\\\]'"$PS1"
      __TERAX_PS1_INJECTED=1
    fi
    printf '\e]133;A\e\\'
  }

  case ":${PROMPT_COMMAND:-}:" in
    *":_terax_precmd:"*) ;;
    *) PROMPT_COMMAND="_terax_precmd${PROMPT_COMMAND:+;$PROMPT_COMMAND}" ;;
  esac

  # Pre-exec marker via PS0 (bash 4.4+). PS0 is expanded just before a command
  # runs — cleaner than a DEBUG trap, which would clobber user traps and fire
  # on every command including inside PROMPT_COMMAND.
  if [ "${BASH_VERSINFO[0]:-0}" -gt 4 ] \
     || { [ "${BASH_VERSINFO[0]:-0}" -eq 4 ] && [ "${BASH_VERSINFO[1]:-0}" -ge 4 ]; }; then
    PS0='\[\e]133;C\e\\\]'"${PS0:-}"
  fi

  # terax_open: open file in editor tab via OSC 8888.
  # Usage: terax_open <file>
  terax_open() {
    local file="$1"

    if [ -z "$file" ]; then
      printf "usage: terax_open <file>\n" >&2
      return 1
    fi

    # Resolve relative paths relative to PWD.
    if [[ "$file" != /* ]]; then
      file="$PWD/$file"
    fi

    # Check that the path exists and is a regular file.
    if [ ! -f "$file" ]; then
      printf "terax_open: not a file: %s\n" "$file" >&2
      return 1
    fi

    # Emit OSC 8888 with URL-encoded file path.
    printf '\e]8888;file=%s\e\\' "$(_terax_urlencode "$file")"
  }

  # Shorthand alias.
  alias tp='terax_open'

  _terax_precmd
fi
: