log_shell_init() {
  printf '%s\n' "shell-init: $*" >>/tmp/shell-init.log 2>/dev/null
}

ensure_bash_preexec() {
  # Load bash-preexec to wire preexec/precmd hooks for Atuin.
  if [ -n "${BASH_VERSION:-}" ] && [ -z "${bash_preexec_imported:-}" ] && [ -r "@BASHPREEXEC@" ]; then
    # shellcheck disable=SC1090
    . "@BASHPREEXEC@"
    log_shell_init "bash-preexec sourced"
  fi
}

append_prompt_command() {
  local cmd="$1"
  case ";${PROMPT_COMMAND:-};" in
    *";$cmd;"*) log_shell_init "PROMPT_COMMAND already has $cmd" ;;
    "")
      PROMPT_COMMAND="$cmd"
      log_shell_init "PROMPT_COMMAND set to $cmd"
      ;;
    *)
      PROMPT_COMMAND="${PROMPT_COMMAND%;};$cmd"
      log_shell_init "PROMPT_COMMAND appended $cmd -> ${PROMPT_COMMAND}"
      ;;
  esac
}

# Consider shells with a TTY interactive even if PS1 is empty.
interactive=0
if [ -t 1 ]; then
  interactive=1
elif [ -n "$PS1" ]; then
  interactive=1
fi

# Ensure a sane TERM for prompt tools.
if [ -z "${TERM:-}" ] || [ "$TERM" = "dumb" ]; then
  export TERM=xterm-256color
fi

log_shell_init "TERM=$TERM PS1=${PS1:-<empty>} SHELL=$SHELL interactive=$interactive"

# Ensure PS1 is set so Atuin/Starship init blocks run consistently.
if [ $interactive -eq 1 ] && [ -z "${PS1:-}" ]; then
  PS1='\\s-\\v\\$ '
fi

# Load bash-preexec early (needed by Atuin).
if [ $interactive -eq 1 ]; then
  ensure_bash_preexec
  if command -v __bp_install >/dev/null 2>&1; then
    __bp_install
  fi
fi

# Prompt via Starship (manual init to avoid PROMPT_COMMAND being lost).
if [ $interactive -eq 1 ] && command -v @STARSHIP@ >/dev/null 2>&1; then
  log_shell_init "starship init"
  case "$SHELL" in
    */bash) eval "$(@STARSHIP@ init bash)" ;;
    */zsh)  eval "$(@STARSHIP@ init zsh)" ;;
  esac
  append_prompt_command starship_precmd
else
  log_shell_init "starship skipped (not interactive or missing)"
fi

# Enable Atuin history integration after Starship so preexec/precmd arrays keep Atuin.
if [ $interactive -eq 1 ] && command -v @ATUIN@ >/dev/null 2>&1; then
  # Ensure session is established even if init script fails to export.
  if [ -z "${ATUIN_SESSION:-}" ]; then
    ATUIN_SESSION=$(@ATUIN@ uuid)
    export ATUIN_SESSION
    ATUIN_HISTORY_ID=""
  fi
  log_shell_init "atuin init"
  case "$SHELL" in
    */bash) eval "$(@ATUIN@ init bash)" ;;
    */zsh)  eval "$(@ATUIN@ init zsh)" ;;
  esac
  # Ensure Atuin hooks stay present.
  if [ -n "${preexec_functions[*]:-}" ]; then
    # Remove existing duplicates then prepend Atuin.
    tmp=()
    for f in "${preexec_functions[@]}"; do
      [ "$f" = "__atuin_preexec" ] && continue
      tmp+=("$f")
    done
    preexec_functions=(__atuin_preexec "${tmp[@]}")
    unset tmp
  else
    preexec_functions=(__atuin_preexec)
  fi
  if [ -n "${precmd_functions[*]:-}" ]; then
    tmp=()
    for f in "${precmd_functions[@]}"; do
      [ "$f" = "__atuin_precmd" ] && continue
      tmp+=("$f")
    done
    precmd_functions=(__atuin_precmd "${tmp[@]}")
    unset tmp
  else
    precmd_functions=(__atuin_precmd)
  fi
else
  log_shell_init "atuin skipped"
fi

# Directory jumping via zoxide.
if [ $interactive -eq 1 ] && command -v zoxide >/dev/null 2>&1; then
  log_shell_init "zoxide init"
  case "$SHELL" in
    */bash) eval "$(zoxide init bash)" ;;
    */zsh)  eval "$(zoxide init zsh)" ;;
  esac
else
  log_shell_init "zoxide skipped"
fi

# Ensure zoxide hook stays in PROMPT_COMMAND even if starship overwrote it.
if [ $interactive -eq 1 ] && command -v __zoxide_hook >/dev/null 2>&1; then
  append_prompt_command __zoxide_hook
fi

# Ensure bash-preexec precmd is present even if other init overwrote PROMPT_COMMAND.
if [ $interactive -eq 1 ] && command -v __bp_precmd_invoke_cmd >/dev/null 2>&1; then
  append_prompt_command __bp_precmd_invoke_cmd
fi
if [ $interactive -eq 1 ] && command -v __bp_interactive_mode >/dev/null 2>&1; then
  append_prompt_command __bp_interactive_mode
fi

# ls aliases via eza.
if command -v eza >/dev/null 2>&1; then
  alias ll='eza -l --icons=auto --group-directories-first'
  alias l.='eza -d .*'
  alias ls='eza'
  alias l1='eza -1'
fi

# grep aliases via ugrep.
if command -v ug >/dev/null 2>&1; then
  alias grep='ug'
  alias egrep='ug -E'
  alias fgrep='ug -F'
  alias xzgrep='ug -z'
  alias xzegrep='ug -zE'
  alias xzfgrep='ug -zF'
fi

# bat for cat.
if command -v bat >/dev/null 2>&1; then
  alias cat='bat --style=plain --pager=never' 2>/dev/null
fi