#!/usr/bin/env bash
# sloptrap
set -euo pipefail

IS_MAC=false
if [[ $(uname -s 2>/dev/null) == "Darwin" ]]; then
  IS_MAC=true
  mac_gnu_bins=(
    /opt/homebrew/opt/coreutils/libexec/gnubin
    /usr/local/opt/coreutils/libexec/gnubin
    /opt/homebrew/opt/gnu-tar/libexec/gnubin
    /usr/local/opt/gnu-tar/libexec/gnubin
  )
  for bin_dir in "${mac_gnu_bins[@]}"; do
    [[ -d $bin_dir ]] || continue
    case ":$PATH:" in
      *":$bin_dir:"*)
        ;;
      *)
        path_head=${PATH%%:*}
        path_rest=""
        if [[ $PATH == *:* ]]; then
          path_rest=${PATH#*:}
        fi
        case "$path_head" in
          /tmp/*|/var/folders/*|"$HOME"/*)
            if [[ -n $path_rest ]]; then
              PATH="$path_head:$bin_dir:$path_rest"
            else
              PATH="$path_head:$bin_dir"
            fi
            ;;
          *)
            PATH="$bin_dir:$PATH"
            ;;
        esac
        unset -v path_head path_rest
        ;;
    esac
  done
  export PATH
fi

REQUIRED_BREW_PKGS="coreutils gnu-tar jq"

require_cmd() {
  if command -v "$1" >/dev/null 2>&1; then
    return 0
  fi
  if $IS_MAC; then
    error "'$1' is required; install with: brew install $REQUIRED_BREW_PKGS"
  else
    error "'$1' is required"
  fi
}
for c in curl tar sha256sum realpath jq; do require_cmd "$c"; done

COLOR_TEXT=$'\033[38;5;247m'
COLOR_HIGHLIGHT=$'\033[38;5;202m'
COLOR_ERROR=$'\033[38;5;160m'
COLOR_COMMENT=$'\033[38;5;242m'
RESET=$'\033[0m'
BOLD=$'\033[1m'

PREFIX_TEXT=$'\033[38;5;247m░\033[0m '
PREFIX_HIGHLIGHT=$'\033[38;5;202m█\033[0m '
PREFIX_ERROR=$'\033[38;5;160m▒\033[0m '
PREFIX_COMMENT=$'\033[38;5;242m▒\033[0m '

print_styled() {
  local color=$1
  local prefix=$2
  local fmt=$3
  shift 3
  printf '%s' "$prefix"
  printf '%b' "$color"
  if (($# > 0)); then
    local -a colored_args=()
    local arg
    for arg in "$@"; do
      colored_args+=("$COLOR_HIGHLIGHT$arg$color")
    done
    # Format strings are defined within sloptrap, not user input.
    # shellcheck disable=SC2059
    printf "$fmt" "${colored_args[@]}"
  else
    printf '%b' "$fmt"
  fi
  printf '%b' "$RESET"
}

print_styled_err() {
  local color=$1
  local prefix=$2
  local fmt=$3
  shift 3
  printf '%s' "$prefix" >&2
  printf '%b' "$color" >&2
  if (($# > 0)); then
    local -a colored_args=()
    local arg
    for arg in "$@"; do
      colored_args+=("$COLOR_HIGHLIGHT$arg$color")
    done
    # Format strings are defined within sloptrap, not user input.
    # shellcheck disable=SC2059
    printf "$fmt" "${colored_args[@]}" >&2
  else
    printf '%b' "$fmt" >&2
  fi
  printf '%b' "$RESET" >&2
}

info_line() {
  print_styled "$COLOR_TEXT" "$PREFIX_TEXT" "$@"
}

highlight_line() {
  print_styled "$COLOR_HIGHLIGHT" "$PREFIX_TEXT" "$@"
}

status_line() {
  print_styled "$COLOR_COMMENT" "$PREFIX_TEXT" "$@"
}

comment_line() {
  print_styled "$COLOR_COMMENT" "$PREFIX_COMMENT" "$@"
}

warn_line() {
  print_styled_err "$COLOR_HIGHLIGHT" "$PREFIX_HIGHLIGHT" "$@"
}

error_line() {
  print_styled_err "$COLOR_ERROR" "$PREFIX_ERROR" "$@"
}

print_banner() {
  printf '%b' "${COLOR_HIGHLIGHT}${BOLD}"
  cat <<'EOF'
  ██████  ██▓     ▒█████   ██▓███  ▄▄▄█████▓ ██▀███   ▄▄▄       ██▓███  
▒██    ▒ ▓██▒    ▒██▒  ██▒▓██░  ██▒▓  ██▒ ▓▒▓██ ▒ ██▒▒████▄    ▓██░  ██▒
░ ▓██▄   ▒██░    ▒██░  ██▒▓██░ ██▓▒▒ ▓██░ ▒░▓██ ░▄█ ▒▒██  ▀█▄  ▓██░ ██▓▒
  ▒   ██▒▒██░    ▒██   ██░▒██▄█▓▒ ▒░ ▓██▓ ░ ▒██▀▀█▄  ░██▄▄▄▄██ ▒██▄█▓▒ ▒
▒██████▒▒░██████▒░ ████▓▒░▒██▒ ░  ░  ▒██▒ ░ ░██▓ ▒██▒ ▓█   ▓██▒▒██▒ ░  ░
▒ ▒▓▒ ▒ ░░ ▒░▓  ░░ ▒░▒░▒░ ▒▓▒░ ░  ░  ▒ ░░   ░ ▒▓ ░▒▓░ ▒▒   ▓▒█░▒▓▒░ ░  
░ ░▒  ░ ░░ ░ ▒░ https://git.sk4.nz/sk4nz/skz-sloptrap  ▒   ▒▒ ░░▒ ░     
   ░  ░    ░ ░   ░ ░ ░ ▒  ░░         ░        ░░   ░   ░   ▒   ░░       
      ░      ░  ░    ░ ░                       ░           ░  ░         
EOF
  printf '%b' "$RESET"
}

MANIFEST_BASENAME=".sloptrap"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
VALID_NAME_REGEX='^[A-Za-z0-9_.-]+$'
DEFAULT_CODEX_ARGS=(--sandbox workspace-write)
SLOPTRAP_IMAGE_LABEL_KEY="net.sk4nz.sloptrap.managed"
SLOPTRAP_IMAGE_LABEL="${SLOPTRAP_IMAGE_LABEL_KEY}=1"

usage() {
  print_banner
  info_line "Usage: %s [options] <code-directory> [target ...]\n" "$0"
  info_line "Options:\n"
  comment_line "  --dry-run         Show planned container command(s) and exit\n"
  comment_line "  --print-config    Display resolved manifest values\n"
  comment_line "  -h, --help        Show this message\n"
  info_line "\n"
  comment_line "Each project supplies configuration via a %s file in its root.\n" "$MANIFEST_BASENAME"
  info_line "Example manifest entries:\n"
  comment_line "  name=my-project\n"
  comment_line "  packages_extra=kubectl helm\n"
  comment_line "  default_targets=run\n"
  comment_line "  codex_args=--sandbox workspace-write\n"
  info_line "\n"
  info_line "Example targets:\n"
  comment_line "  run               Build if needed, then launch Codex\n"
  comment_line "  resume <id>       Build if needed, then run 'codex resume <id>'\n"
  comment_line "  shell             Drop into an interactive /bin/bash session\n"
  comment_line "  clean             Remove the project container/image cache\n"
  comment_line "  prune             Remove dangling/unused sloptrap images\n"
}

error() {
  error_line "error: %s\n" "$1"
  exit 1
}

warn() {
  warn_line "warning: %s\n" "$1"
}

trim() {
  local value=$1
  value="${value#"${value%%[![:space:]]*}"}"
  value="${value%"${value##*[![:space:]]}"}"
  printf '%s' "$value"
}

resolve_path_relaxed() {
  local candidate=$1
  local resolved
  if resolved=$(realpath -m "$candidate" 2>/dev/null); then
    printf '%s' "$resolved"
    return 0
  fi
  return 1
}

resolve_path_strict() {
  local candidate=$1
  local resolved
  if resolved=$(resolve_path_relaxed "$candidate"); then
    printf '%s' "$resolved"
    return 0
  fi
  error "failed to resolve path '$candidate'; install GNU coreutils for realpath support"
}

declare -A MANIFEST=()
declare -a SLOPTRAP_IGNORE_ENTRIES=()
declare -a IGNORE_MOUNT_ARGS=()
MANIFEST_PRESENT=false

CURRENT_IGNORE_FILE=""
CONTAINER_ENGINE=""
CODEX_HOME_HOST=""
CODEX_HOME_BOOTSTRAP=false
NEED_LOGIN=false
IGNORE_STUB_BASE=""
IGNORE_HELPER_ROOT=""
ALLOW_HOST_NETWORK=false

declare -a SLOPTRAP_TEMP_PATHS=()

register_temp_path() {
  SLOPTRAP_TEMP_PATHS+=("$1")
}

cleanup_temp_paths() {
  local path
  for path in "${SLOPTRAP_TEMP_PATHS[@]}"; do
    [[ -n ${path:-} ]] || continue
    rm -rf "$path" >/dev/null 2>&1 || true
  done
}

cleanup_ignore_stub_dir() {
  local helper_root=${IGNORE_HELPER_ROOT:-}
  local stub_base=${IGNORE_STUB_BASE:-}
  [[ -n $helper_root && -n $stub_base ]] || return 0
  [[ -d $stub_base ]] || return 0
  local resolved_helper resolved_stub
  if ! resolved_helper=$(resolve_path_relaxed "$helper_root"); then
    warn "failed to resolve helper root '$helper_root' during cleanup"
    return 0
  fi
  if ! resolved_stub=$(resolve_path_relaxed "$stub_base"); then
    warn "failed to resolve helper stub '$stub_base' during cleanup"
    return 0
  fi
  case "$resolved_stub" in
    "$resolved_helper"/session-*|"$resolved_helper"/fallback)
      rm -rf "$resolved_stub"
      ;;
    *)
      warn "refusing to remove unexpected helper path '$resolved_stub'"
      ;;
  esac
}

sloptrap_exit_trap() {
  cleanup_temp_paths
  cleanup_ignore_stub_dir
}

trap sloptrap_exit_trap EXIT INT TERM HUP

create_temp_dir() {
  local label=${1:-tmp}
  local template="${TMPDIR:-/tmp}/sloptrap.${label}.XXXXXXXX"
  local dir
  if ! dir=$(mktemp -d "$template"); then
    error "failed to create temporary directory under ${TMPDIR:-/tmp}"
  fi
  register_temp_path "$dir"
  printf '%s' "$dir"
}

write_embedded_dockerfile() {
  cat <<'EOF'
# Dockerfile.sloptrap
ARG BASE_IMAGE=debian:trixie-slim
FROM ${BASE_IMAGE}

ENV DEBIAN_FRONTEND=noninteractive

ARG BASE_PACKAGES="curl bash ca-certificates libstdc++6 ripgrep xxd file procps"
ARG EXTRA_PACKAGES=""
RUN apt-get update \
 && apt-get install -y --no-install-recommends apt-utils ${BASE_PACKAGES} ${EXTRA_PACKAGES} \
 && rm -rf /var/lib/apt/lists/*

ARG CODEX_UID=1337
ARG CODEX_GID=1337
RUN groupadd --gid ${CODEX_GID} sloptrap \
 && useradd --create-home --home-dir /home/sloptrap \
            --gid sloptrap --uid ${CODEX_UID} --shell /bin/bash sloptrap

ARG CODEX_BIN=codex
ARG CODEX_CONF=config/config.toml
COPY ${CODEX_BIN} /usr/local/bin/codex

RUN chown -R sloptrap:sloptrap /home/sloptrap
USER sloptrap

WORKDIR /workspace

ENV SHELL=/bin/bash HOME=/home/sloptrap
ENTRYPOINT ["codex"]
EOF
}

populate_dockerfile() {
  local destination=$1
  mkdir -p "$(dirname "$destination")"
  if [[ -n $SLOPTRAP_DOCKERFILE_SOURCE ]]; then
    if [[ ! -f $SLOPTRAP_DOCKERFILE_SOURCE ]]; then
      error "container recipe '$SLOPTRAP_DOCKERFILE_SOURCE' not found"
    fi
    cp "$SLOPTRAP_DOCKERFILE_SOURCE" "$destination"
  else
    write_embedded_dockerfile >"$destination"
  fi
}

validate_basename() {
  local name=$1
  [[ $name =~ ^[A-Za-z0-9._+-]+$ ]] || error "invalid basename '$name'"
}

sanitize_engine_name() {
  local name=$1
  local lowered=${name,,}
  if [[ $lowered != "$name" ]]; then
    warn "normalizing name '$name' to '$lowered' for container engine compatibility"
  fi
  if [[ ! $lowered =~ ^[a-z0-9_.-]+$ ]]; then
    error "engine name '$name' is invalid after normalization"
  fi
  printf '%s' "$lowered"
}

prepare_build_context() {
  if [[ -n $SLOPTRAP_BUILD_CONTEXT && -d $SLOPTRAP_BUILD_CONTEXT ]]; then
    return 0
  fi
  SLOPTRAP_BUILD_CONTEXT=$(create_temp_dir "context")
  SLOPTRAP_DOCKERFILE_PATH="$SLOPTRAP_BUILD_CONTEXT/Dockerfile.sloptrap"
  populate_dockerfile "$SLOPTRAP_DOCKERFILE_PATH"
  validate_basename "$SLOPTRAP_CODEX_BIN_NAME"
  CODEX_BIN_PATH="$SLOPTRAP_BUILD_CONTEXT/$SLOPTRAP_CODEX_BIN_NAME"
}

select_codex_home() {
  local preferred="$HOME/.codex"
  if [[ -L $preferred ]]; then
    error "Codex home '$preferred' must not be a symlink"
  fi
  if [[ -e $preferred && ! -d $preferred ]]; then
    error "expected Codex home '$preferred' to be a directory"
  fi

  CODEX_HOME_HOST="$preferred"
  if [[ -d $CODEX_HOME_HOST ]]; then
    CODEX_HOME_HOST="$(cd "$CODEX_HOME_HOST" && pwd -P)"
    CODEX_HOME_BOOTSTRAP=false
  else
    CODEX_HOME_BOOTSTRAP=true
  fi
}

assert_path_within_code_dir() {
  local candidate=$1
  local resolved
  resolved=$(resolve_path_strict "$candidate")
  if [[ $resolved != "$CODE_DIR" && $resolved != "$CODE_DIR/"* ]]; then
    error "path '$candidate' escapes project root '$CODE_DIR'"
  fi
}

ensure_ignore_helper_root() {
  local helper_root="$CODE_DIR/.sloptrap-ignores"
  if [[ -L $helper_root ]]; then
    error "$helper_root: helper directory may not be a symlink"
  fi
  if [[ -e $helper_root && ! -d $helper_root ]]; then
    error "$helper_root: expected a directory"
  fi
  assert_path_within_code_dir "$helper_root"
  IGNORE_HELPER_ROOT="$helper_root"
}

sanitize_ignore_rel() {
  local rel=$1
  local original=$rel
  local source=${CURRENT_IGNORE_FILE:-$MANIFEST_PATH}
  while [[ $rel == ./* ]]; do
    rel=${rel:2}
  done
  if [[ -z $rel || $rel == "." ]]; then
    error "$source: .sloptrapignore entry '$original' may not target the project root"
  fi
  if [[ ${rel:0:1} == "/" ]]; then
    error "$source: .sloptrapignore entry '$original' must be relative"
  fi
  local IFS='/'
  local -a segments=()
  read -r -a segments <<< "$rel"
  if [[ ${#segments[@]} -eq 0 ]]; then
    error "$source: .sloptrapignore entry '$original' is invalid"
  fi
  local segment
  for segment in "${segments[@]}"; do
    if [[ -z $segment || $segment == "." || $segment == ".." ]]; then
      error "$source: .sloptrapignore entry '$original' uses disallowed path components"
    fi
  done
  if [[ ${rel//$'\n'/} != "$rel" || ${rel//$'\r'/} != "$rel" ]]; then
    error "$source: .sloptrapignore entry '$original' contains control characters"
  fi
  local resolved
  resolved=$(resolve_path_strict "$CODE_DIR/$rel")
  if [[ $resolved != "$CODE_DIR" && $resolved != "$CODE_DIR/"* ]]; then
    error "$source: .sloptrapignore entry '$original' resolves outside the project root"
  fi
  printf '%s' "$rel"
}

resolve_sloptrap_ignore() {
  local root=$1
  local ignore_file="$root/.sloptrapignore"
  SLOPTRAP_IGNORE_ENTRIES=()
  [[ -f $ignore_file ]] || return 0

  CURRENT_IGNORE_FILE="$ignore_file"
  local -a patterns=()
  local line trimmed
  while IFS= read -r line || [[ -n $line ]]; do
    trimmed="$(trim "$line")"
    [[ -z $trimmed ]] && continue
    [[ ${trimmed:0:1} == "#" ]] && continue
    patterns+=("$trimmed")
  done <"$ignore_file"
  [[ ${#patterns[@]} -gt 0 ]] || return 0

  local -A selected=()
  local pattern negate anchored dir_only raw had_match
  local -a matches
  local match rel
  local prev_gs prev_ng prev_dg
  prev_gs=$(shopt -p globstar 2>/dev/null || true)
  prev_ng=$(shopt -p nullglob 2>/dev/null || true)
  prev_dg=$(shopt -p dotglob 2>/dev/null || true)
  shopt -s globstar nullglob dotglob
  for pattern in "${patterns[@]}"; do
    negate=false
    anchored=false
    dir_only=false
    raw="$pattern"
    had_match=false
    if [[ ${raw:0:1} == "!" ]]; then
      negate=true
      raw=${raw:1}
    fi
    if [[ ${raw:0:1} == "/" ]]; then
      anchored=true
      raw=${raw:1}
    fi
    if [[ ${raw: -1} == "/" ]]; then
      dir_only=true
      raw=${raw%/}
    fi
    [[ -n $raw ]] || raw="."
    matches=()
    if $anchored; then
      while IFS= read -r match; do
        matches+=("$root/$match")
      done < <(
        cd "$root" && { compgen -G "$raw" || true; }
      )
    else
      while IFS= read -r match; do
        matches+=("$root/$match")
      done < <(
        cd "$root" && { compgen -G "$raw" || true; }
      )
      while IFS= read -r match; do
        matches+=("$root/$match")
      done < <(
        cd "$root" && { compgen -G "**/$raw" || true; }
      )
    fi
    local -A seen=()
    for match in "${matches[@]}"; do
      [[ -e $match ]] || continue
      if [[ $match != "$root" && $match != $root/* ]]; then
        continue
      fi
      rel=${match#"$root"/}
      [[ -n $rel ]] || rel="."
      if $dir_only && [[ ! -d $match ]]; then
        continue
      fi
      if [[ -n ${seen[$rel]-} ]]; then
        continue
      fi
      seen[$rel]=1
      rel=$(sanitize_ignore_rel "$rel")
      had_match=true
      if $negate; then
        unset 'selected[$rel]'
      else
        if [[ -d $match ]]; then
          selected[$rel]="dir"
        else
          selected[$rel]="file"
        fi
      fi
    done
    if ! $had_match && ! $negate; then
      warn "${CURRENT_IGNORE_FILE:-$MANIFEST_PATH}: .sloptrapignore entry '$pattern' matched no files"
    fi
  done
  eval "$prev_gs"
  eval "$prev_ng"
  eval "$prev_dg"

  if [[ ${#selected[@]} -eq 0 ]]; then
    CURRENT_IGNORE_FILE=""
    return 0
  fi
  SLOPTRAP_IGNORE_ENTRIES=()
  for rel in "${!selected[@]}"; do
    SLOPTRAP_IGNORE_ENTRIES+=("${selected[$rel]}"$'\t'"$rel")
  done
  mapfile -t SLOPTRAP_IGNORE_ENTRIES < <(printf '%s\n' "${SLOPTRAP_IGNORE_ENTRIES[@]}" | sort)
  CURRENT_IGNORE_FILE=""
}

escape_mount_value() {
  local value=$1
  value=${value//\\/\\\\}
  value=${value//,/\\,}
  value=${value//=/\\=}
  printf '%s' "$value"
}

prepare_ignore_mounts() {
  IGNORE_MOUNT_ARGS=()
  [[ ${#SLOPTRAP_IGNORE_ENTRIES[@]} -gt 0 ]] || return 0
  local container_root="${SLOPTRAP_WORKDIR:-/workspace}"
  if [[ $container_root != "/" ]]; then
    container_root="${container_root%/}"
    [[ -n $container_root ]] || container_root="/"
  fi
  local entry type rel target host_path stub_base target_mount host_path_mount
  stub_base="$IGNORE_STUB_BASE"
  assert_path_within_code_dir "$stub_base"
  rm -rf "$stub_base" 2>/dev/null || true
  if ! mkdir -p "$stub_base/files" 2>/dev/null; then
    stub_base="$CODE_DIR/.sloptrap-ignores/fallback"
    assert_path_within_code_dir "$stub_base"
    rm -rf "$stub_base" 2>/dev/null || true
    mkdir -p "$stub_base/files"
  fi
  IGNORE_STUB_BASE="$stub_base"
  for entry in "${SLOPTRAP_IGNORE_ENTRIES[@]}"; do
    type=${entry%%$'\t'*}
    rel=${entry#*$'\t'}
    if [[ $container_root == "/" ]]; then
      target="/$rel"
    else
      target="$container_root/$rel"
    fi
    target_mount=$(escape_mount_value "$target")
    case "$type" in
      dir)
        IGNORE_MOUNT_ARGS+=("--mount" "type=tmpfs,target=$target_mount")
        ;;
      file)
        host_path="$stub_base/files/$rel"
        assert_path_within_code_dir "$host_path"
        mkdir -p "$(dirname "$host_path")"
        : > "$host_path"
        host_path_mount=$(escape_mount_value "$host_path")
        IGNORE_MOUNT_ARGS+=("--mount" "type=bind,source=$host_path_mount,target=$target_mount,readonly")
        ;;
    esac
  done
}

ensure_safe_for_make() {
  local key=$1
  local value=$2
  if [[ $value == *'$'* || $value == *'`'* ]]; then
    error "$MANIFEST_PATH: value for '$key' must not contain \$ or \` characters"
  fi
  if [[ $value == *$'\n'* ]]; then
    error "$MANIFEST_PATH: value for '$key' must not span multiple lines"
  fi
}

validate_package_list() {
  local key=$1
  local raw=$2
  local source=${3:-$MANIFEST_PATH}
  [[ -z $raw ]] && return 0
  local token
  for token in $raw; do
    if [[ ! $token =~ ^[A-Za-z0-9+.-]+$ ]]; then
      error "$source: invalid package name '$token' in '$key'"
    fi
  done
}

detect_container_engine() {
  local override=${SLOPTRAP_CONTAINER_ENGINE-}
  if [[ -n $override ]]; then
    local engine="${override,,}"
    if ! command -v "$engine" >/dev/null 2>&1; then
      error "container engine '$engine' not found in PATH"
    fi
    printf '%s' "$engine"
    return 0
  fi
  if command -v podman >/dev/null 2>&1; then
    printf 'podman'
    return 0
  fi
  if command -v docker >/dev/null 2>&1; then
    printf 'docker'
    return 0
  fi
  error "container engine not found in PATH; install podman (preferred) or docker, or set SLOPTRAP_CONTAINER_ENGINE explicitly"
}

parse_manifest() {
  local manifest_path=$1
  local line key value
  while IFS= read -r line || [[ -n $line ]]; do
    line="$(trim "$line")"
    [[ -z $line ]] && continue
    [[ ${line:0:1} == "#" ]] && continue
    if [[ $line != *"="* ]]; then
      error "$manifest_path: expected KEY=VALUE entry (got '$line')"
    fi
    key="$(trim "${line%%=*}")"
    value="$(trim "${line#*=}")"
    if [[ -z $key ]]; then
      error "$manifest_path: blank key in line '$line'"
    fi
    if [[ ( ${value:0:1} == '"' && ${value: -1} == '"' ) || ( ${value:0:1} == "'" && ${value: -1} == "'" ) ]]; then
      value="${value:1:-1}"
    fi
    if [[ $key == make.* ]]; then
      error "$manifest_path: make.* overrides are no longer supported; use packages_extra instead"
    fi
    MANIFEST["$key"]=$value
  done < "$manifest_path"
}

print_config() {
  local manifest_path=$1
  info_line "manifest_path=%s\n" "$manifest_path"
  info_line "manifest_present=%s\n" "$MANIFEST_PRESENT"
  info_line "project_name=%s\n" "$PROJECT_NAME"
  info_line "project_dir=%s\n" "$CODE_DIR"
  info_line "resolved_targets=%s\n" "${DEFAULT_TARGETS[*]}"
  info_line "container_engine=%s\n" "$CONTAINER_ENGINE"
  info_line "image_name=%s\n" "$SLOPTRAP_IMAGE_NAME"
  info_line "container_name=%s\n" "$SLOPTRAP_CONTAINER_NAME"
  info_line "codex_home=%s\n" "$CODEX_HOME_HOST"
  info_line "codex_home_bootstrap=%s\n" "$CODEX_HOME_BOOTSTRAP"
  info_line "codex_archive=%s\n" "$SLOPTRAP_CODEX_ARCHIVE"
  info_line "codex_url=%s\n" "$SLOPTRAP_CODEX_URL"
  info_line "needs_login=%s\n" "$NEED_LOGIN"
  info_line "codex_args=%s\n" "$CODEX_ARGS_DISPLAY"
  info_line "ignore_stub_base=%s\n" "$IGNORE_STUB_BASE"
  if [[ ${#SLOPTRAP_IGNORE_ENTRIES[@]} -gt 0 ]]; then
    local ignore_paths
    ignore_paths=$(printf '%s ' "${SLOPTRAP_IGNORE_ENTRIES[@]}")
    ignore_paths=${ignore_paths% }
    info_line "ignore_paths=%s\n" "$ignore_paths"
  else
    info_line "ignore_paths=\n"
  fi
  if [[ -n $SLOPTRAP_DOCKERFILE_SOURCE ]]; then
    info_line "dockerfile_source=%s\n" "$SLOPTRAP_DOCKERFILE_SOURCE"
  else
    info_line "dockerfile_source=embedded\n"
  fi
  for key in "${!MANIFEST[@]}"; do
    info_line "%s=%s\n" "$key" "${MANIFEST[$key]}"
  done
}

declare -a CONTAINER_SHARED_OPTS=()
declare -a BASE_CONTAINER_CMD=()
SLOPTRAP_IMAGE_NAME=""
SLOPTRAP_CONTAINER_NAME=""
SLOPTRAP_DOCKERFILE_PATH=""
SLOPTRAP_BUILD_CONTEXT=""
SLOPTRAP_DOCKERFILE_SOURCE=""
CODEX_BIN_PATH=""
SLOPTRAP_SHARED_DIR_ABS=""
SLOPTRAP_PACKAGES_BASE=""
SLOPTRAP_PACKAGES_EXTRA_RESOLVED=""
SLOPTRAP_CODEX_BIN_NAME=""
SLOPTRAP_CODEX_URL=""
SLOPTRAP_CODEX_ARCHIVE=""
SLOPTRAP_CODEX_HOME_CONT=""
SLOPTRAP_SECURITY_OPTS_EXTRA=""
SLOPTRAP_VOLUME_LABEL=""
SLOPTRAP_WORKDIR=${SLOPTRAP_WORKDIR-}
SLOPTRAP_NETWORK_NAME=""
SLOPTRAP_LIMITS_PID=""
SLOPTRAP_LIMITS_RAM=""
SLOPTRAP_LIMITS_SWP=""
SLOPTRAP_LIMITS_SHM=""
SLOPTRAP_LIMITS_CPU=""
SLOPTRAP_TMPFS_PATHS=""
SLOPTRAP_ROOTFS_READONLY=""

get_env_default() {
  local var=$1
  local default=$2
  local value
  if value=$(printenv "$var" 2>/dev/null); then
    printf '%s' "$value"
  else
    printf '%s' "$default"
  fi
}

validate_codex_archive_name() {
  local name=$1
  [[ $name =~ ^codex-[A-Za-z0-9_.-]+$ ]] || error "invalid Codex archive name '$name'"
}

detect_codex_archive_name() {
  local os arch codex_os codex_arch
  os=$(uname -s 2>/dev/null || true)
  arch=$(uname -m 2>/dev/null || true)
  [[ -n $os ]] || error "failed to detect host OS for Codex download"
  [[ -n $arch ]] || error "failed to detect host architecture for Codex download"
  case "$os" in
    Linux|Darwin) codex_os="unknown-linux-gnu" ;; # Codex runs inside a Debian-based image
    *) error "unsupported host OS '$os' for Codex download" ;;
  esac
  case "$arch" in
    x86_64|amd64) codex_arch="x86_64" ;;
    arm64|aarch64) codex_arch="aarch64" ;;
    *) error "unsupported host architecture '$arch' for Codex download" ;;
  esac
  printf 'codex-%s-%s' "$codex_arch" "$codex_os"
}

resolve_container_workdir() {
  if [[ -z ${SLOPTRAP_WORKDIR:-} ]]; then
    SLOPTRAP_WORKDIR=$(get_env_default "SLOPTRAP_WORKDIR" "/workspace")
  fi
  [[ -n $SLOPTRAP_WORKDIR ]] || SLOPTRAP_WORKDIR="/workspace"
  if [[ $SLOPTRAP_WORKDIR == "/" ]]; then
    error "SLOPTRAP_WORKDIR may not be '/'; use a subdirectory like /workspace"
  fi
}

print_command() {
  local rendered=""
  if [[ $# -gt 0 ]]; then
    rendered=$(printf '%q ' "$@")
    rendered=${rendered% }
  fi
  comment_line "%s\n" "$rendered"
}

run_or_print() {
  if $DRY_RUN; then
    print_command "$@"
    return 0
  fi
  "$@"
}

ensure_codex_home_dir() {
  if [[ -d $CODEX_HOME_HOST ]]; then
    return 0
  fi
  if $DRY_RUN; then
    print_command mkdir -p "$CODEX_HOME_HOST"
    return 0
  fi
  mkdir -p "$CODEX_HOME_HOST"
}

fetch_latest_codex_digest() {
  local api_url="https://api.github.com/repos/openai/codex/releases/latest"
  local target_asset="${SLOPTRAP_CODEX_ARCHIVE}.tar.gz"
  [[ -n $SLOPTRAP_CODEX_ARCHIVE ]] || error "Codex archive name is not set"
  if ! command -v jq >/dev/null 2>&1; then
    error "jq is required to verify the Codex binary digest"
  fi
  local response
  if ! response=$(curl -fsSL "$api_url"); then
    error "failed to download Codex release metadata from GitHub"
  fi
  local digest_line
  digest_line=$(jq -r --arg name "$target_asset" '.assets[] | select(.name == $name) | .digest' <<<"$response" | head -n 1)
  if [[ -z $digest_line || $digest_line == "null" ]]; then
    error "failed to resolve Codex digest from GitHub response"
  fi
  digest_line=${digest_line#sha256:}
  printf '%s' "$digest_line"
}

ensure_codex_binary() {
  prepare_build_context
  if [[ -x $CODEX_BIN_PATH ]]; then
    return 0
  fi
  local tar_transform="s/${SLOPTRAP_CODEX_ARCHIVE}/${SLOPTRAP_CODEX_BIN_NAME}/"
  local download_dir
  download_dir=$(create_temp_dir "codex")
  local tmp_archive="$download_dir/codex.tar.gz"
  if $DRY_RUN; then
    print_command curl -Lso "$tmp_archive" "$SLOPTRAP_CODEX_URL"
    print_command sha256sum -c -
    print_command tar -xzf "$tmp_archive" --transform="$tar_transform" -C "$SLOPTRAP_BUILD_CONTEXT"
    print_command chmod 0755 "$CODEX_BIN_PATH"
    return 0
  fi
  if ! curl -Lso "$tmp_archive" "$SLOPTRAP_CODEX_URL"; then
    rm -rf "$download_dir"
    error "failed to download Codex binary from '$SLOPTRAP_CODEX_URL'"
  fi
  local expected_digest
  expected_digest=$(fetch_latest_codex_digest)
  if ! printf "%s  %s\n" "$expected_digest" "$tmp_archive" | sha256sum -c - >/dev/null 2>&1; then
    rm -rf "$download_dir" "$CODEX_BIN_PATH"
    error "checksum verification failed for $SLOPTRAP_CODEX_BIN_NAME"
  fi
  if ! tar -xzf "$tmp_archive" --transform="$tar_transform" -C "$SLOPTRAP_BUILD_CONTEXT"; then
    rm -rf "$download_dir"
    error "failed to extract Codex binary"
  fi
  rm -rf "$download_dir"
  chmod 0755 "$CODEX_BIN_PATH"
}

ensure_safe_sandbox() {
  local -a args=("$@")
  local sandbox_mode=""
  local i=0
  while [[ $i -lt ${#args[@]} ]]; do
    if [[ ${args[$i]} == "--sandbox" ]]; then
      if (( i + 1 >= ${#args[@]} )); then
        error "$MANIFEST_PATH: '--sandbox' flag requires a mode (workspace-write or workspace-read-only)"
      fi
      sandbox_mode="${args[$((i + 1))]}"
    fi
    ((i+=1))
  done
  if [[ -z $sandbox_mode ]]; then
    error "$MANIFEST_PATH: codex_args must include '--sandbox <mode>' (workspace-write or workspace-read-only)"
  fi
  case "$sandbox_mode" in
    workspace-write|workspace-read-only)
      ;;
    *)
      error "$MANIFEST_PATH: sandbox mode '$sandbox_mode' is not allowed (expected workspace-write or workspace-read-only)"
      ;;
  esac
}

normalize_package_list() {
  local raw=$1
  raw="$(trim "$raw")"
  [[ -z $raw ]] && return 0
  local -a tokens=()
  read -r -a tokens <<< "$raw"
  printf '%s' "${tokens[*]}"
}

prepare_container_runtime() {
  resolve_container_workdir
  SLOPTRAP_PACKAGES_EXTRA_RESOLVED=$PACKAGES_EXTRA
  SLOPTRAP_SHARED_DIR_ABS="$CODE_DIR"
  if [[ ! -d $SLOPTRAP_SHARED_DIR_ABS ]]; then
    error "shared directory '$SLOPTRAP_SHARED_DIR_ABS' does not exist"
  fi
  SLOPTRAP_SHARED_DIR_ABS="$(cd "$SLOPTRAP_SHARED_DIR_ABS" && pwd -P)"

  local dockerfile_override
  dockerfile_override=$(get_env_default "SLOPTRAP_DOCKERFILE_PATH" "")
  if [[ -n $dockerfile_override ]]; then
    if [[ $dockerfile_override != /* ]]; then
      dockerfile_override="$SCRIPT_DIR/$dockerfile_override"
    fi
    if [[ ! -f $dockerfile_override ]]; then
      error "container recipe '$dockerfile_override' not found"
    fi
    SLOPTRAP_DOCKERFILE_SOURCE="$dockerfile_override"
  elif [[ -f "$SCRIPT_DIR/Dockerfile.sloptrap" ]]; then
    SLOPTRAP_DOCKERFILE_SOURCE="$SCRIPT_DIR/Dockerfile.sloptrap"
  else
    SLOPTRAP_DOCKERFILE_SOURCE=""
  fi

  SLOPTRAP_PACKAGES_BASE=$(get_env_default "SLOPTRAP_PACKAGES" "curl bash ca-certificates libstdc++6 git ripgrep xxd file procps")
  validate_package_list "SLOPTRAP_PACKAGES" "$SLOPTRAP_PACKAGES_BASE" "SLOPTRAP_PACKAGES"
  local default_codex_archive
  default_codex_archive=$(detect_codex_archive_name)
  local env_codex_archive
  env_codex_archive=$(printenv "SLOPTRAP_CODEX_ARCHIVE" 2>/dev/null || true)
  if [[ -n $env_codex_archive ]]; then
    SLOPTRAP_CODEX_ARCHIVE=$env_codex_archive
  else
    SLOPTRAP_CODEX_ARCHIVE=$default_codex_archive
  fi
  validate_codex_archive_name "$SLOPTRAP_CODEX_ARCHIVE"
  local default_codex_url="https://github.com/openai/codex/releases/latest/download/${SLOPTRAP_CODEX_ARCHIVE}.tar.gz"
  SLOPTRAP_CODEX_URL=$(get_env_default "SLOPTRAP_CODEX_URL" "$default_codex_url")
  if [[ -z $env_codex_archive ]]; then
    local inferred_archive
    inferred_archive=$(basename "${SLOPTRAP_CODEX_URL%%\?*}")
    inferred_archive=${inferred_archive%.tar.gz}
    if [[ $inferred_archive == codex-* ]]; then
      validate_codex_archive_name "$inferred_archive"
      SLOPTRAP_CODEX_ARCHIVE=$inferred_archive
    fi
  fi
  SLOPTRAP_CODEX_BIN_NAME=$(get_env_default "SLOPTRAP_CODEX_BIN" "codex")
  SLOPTRAP_CODEX_HOME_CONT=$(get_env_default "SLOPTRAP_CODEX_HOME_CONT" "/codex")
  SLOPTRAP_CODEX_UID=$(get_env_default "SLOPTRAP_CODEX_UID" "1337")
  SLOPTRAP_CODEX_GID=$(get_env_default "SLOPTRAP_CODEX_GID" "1337")
  SLOPTRAP_SECURITY_OPTS_EXTRA=$(get_env_default "SLOPTRAP_SECURITY_OPTS_EXTRA" "")
  local default_network="bridge"
  if [[ $CONTAINER_ENGINE == "podman" ]]; then
    if command -v slirp4netns >/dev/null 2>&1; then
      default_network="slirp4netns"
    else
      warn "podman detected but 'slirp4netns' is missing; falling back to 'bridge' networking"
    fi
  fi
  SLOPTRAP_NETWORK_NAME=$(get_env_default "SLOPTRAP_NETWORK_NAME" "$default_network")
  if $ALLOW_HOST_NETWORK; then
    SLOPTRAP_NETWORK_NAME="host"
  elif [[ $SLOPTRAP_NETWORK_NAME == "host" ]]; then
    error "$MANIFEST_PATH: host networking requires allow_host_network=true"
  fi
  SLOPTRAP_LIMITS_PID=$(get_env_default "SLOPTRAP_LIMITS_PID" "1024")
  SLOPTRAP_LIMITS_RAM=$(get_env_default "SLOPTRAP_LIMITS_RAM" "1024m")
  SLOPTRAP_LIMITS_SWP=$(get_env_default "SLOPTRAP_LIMITS_SWP" "1024m")
  SLOPTRAP_LIMITS_SHM=$(get_env_default "SLOPTRAP_LIMITS_SHM" "1024m")
  SLOPTRAP_LIMITS_CPU=$(get_env_default "SLOPTRAP_LIMITS_CPU" "8")
  SLOPTRAP_TMPFS_PATHS=$(get_env_default "SLOPTRAP_TMPFS_PATHS" "/tmp:exec /run /run/lock")
  SLOPTRAP_ROOTFS_READONLY=$(get_env_default "SLOPTRAP_ROOTFS_READONLY" "1")
  SLOPTRAP_IMAGE_NAME=$(get_env_default "SLOPTRAP_IMAGE_NAME" "${PROJECT_NAME}-sloptrap-image")
  SLOPTRAP_CONTAINER_NAME=$(get_env_default "SLOPTRAP_CONTAINER_NAME" "${PROJECT_NAME}-sloptrap-container")
  SLOPTRAP_IMAGE_NAME=$(sanitize_engine_name "$SLOPTRAP_IMAGE_NAME")
  SLOPTRAP_CONTAINER_NAME=$(sanitize_engine_name "$SLOPTRAP_CONTAINER_NAME")

  local -a network_opts=(--network "$SLOPTRAP_NETWORK_NAME" --init)
  local -a security_opts=(--cap-drop=ALL --security-opt no-new-privileges)
  if [[ -n $SLOPTRAP_SECURITY_OPTS_EXTRA ]]; then
    local -a extra_opts=()
    read -r -a extra_opts <<< "$SLOPTRAP_SECURITY_OPTS_EXTRA"
    security_opts+=("${extra_opts[@]}")
  fi
  local -a resource_opts=(
    --pids-limit "$SLOPTRAP_LIMITS_PID"
    --memory "$SLOPTRAP_LIMITS_RAM"
    --memory-swap "$SLOPTRAP_LIMITS_SWP"
    --shm-size "$SLOPTRAP_LIMITS_SHM"
    --cpus "$SLOPTRAP_LIMITS_CPU"
  )
  local -a tmpfs_opts=()
  if [[ -n $SLOPTRAP_TMPFS_PATHS ]]; then
    local -a tmpfs_paths=()
    read -r -a tmpfs_paths <<< "$SLOPTRAP_TMPFS_PATHS"
    local path
    for path in "${tmpfs_paths[@]}"; do
      tmpfs_opts+=(--tmpfs "$path")
    done
  fi

  local rootfs_flag=()
  case "${SLOPTRAP_ROOTFS_READONLY,,}" in
    1|true|yes)
      rootfs_flag=(--read-only)
      ;;
  esac

  if [[ $CONTAINER_ENGINE == "podman" ]]; then
    SLOPTRAP_VOLUME_LABEL=":Z"
  else
    SLOPTRAP_VOLUME_LABEL=""
  fi

  local -a volume_opts=(
    -v "$SLOPTRAP_SHARED_DIR_ABS:$SLOPTRAP_WORKDIR$SLOPTRAP_VOLUME_LABEL"
    -v "$CODEX_HOME_HOST:$SLOPTRAP_CODEX_HOME_CONT$SLOPTRAP_VOLUME_LABEL"
  )

  local -a env_args=(
    -e "HOME=$SLOPTRAP_CODEX_HOME_CONT"
    -e "XDG_CONFIG_HOME=$SLOPTRAP_CODEX_HOME_CONT/config"
    -e "XDG_CACHE_HOME=$SLOPTRAP_CODEX_HOME_CONT/cache"
    -e "XDG_STATE_HOME=$SLOPTRAP_CODEX_HOME_CONT/state"
    -e "CODEX_HOME=$SLOPTRAP_CODEX_HOME_CONT"
  )

  local uid gid
  uid=$(id -u)
  gid=$(id -g)
  local -a user_opts=("--user" "$uid:$gid")
  if [[ $CONTAINER_ENGINE == "podman" ]]; then
    user_opts=(--userns="keep-id:uid=$uid,gid=$gid" "${user_opts[@]}")
  fi

  CONTAINER_SHARED_OPTS=(
    "${network_opts[@]}"
    "${security_opts[@]}"
    "${resource_opts[@]}"
    "${rootfs_flag[@]}"
    "${tmpfs_opts[@]}"
    "${volume_opts[@]}"
    "${env_args[@]}"
    "${IGNORE_MOUNT_ARGS[@]}"
    "${user_opts[@]}"
    -w "$SLOPTRAP_WORKDIR"
  )

  BASE_CONTAINER_CMD=(
    "$CONTAINER_ENGINE" run --rm -it
    --name "$SLOPTRAP_CONTAINER_NAME"
    "${CONTAINER_SHARED_OPTS[@]}"
  )
}

build_image() {
  ensure_codex_binary
  print_banner
  local extra_packages_arg
  extra_packages_arg=$(normalize_package_list "$SLOPTRAP_PACKAGES_EXTRA_RESOLVED")
  if ! $DRY_RUN; then
    status_line "Building %s\n" "$SLOPTRAP_IMAGE_NAME"
  fi
  local -a cmd=(
    "$CONTAINER_ENGINE" build --quiet
    -t "$SLOPTRAP_IMAGE_NAME"
    -f "$SLOPTRAP_DOCKERFILE_PATH"
    --label "$SLOPTRAP_IMAGE_LABEL"
    --build-arg "BASE_PACKAGES=$SLOPTRAP_PACKAGES_BASE"
    --build-arg "CODEX_BIN=$SLOPTRAP_CODEX_BIN_NAME"
    --build-arg "CODEX_UID=$SLOPTRAP_CODEX_UID"
    --build-arg "CODEX_GID=$SLOPTRAP_CODEX_GID"
  )
  if [[ -n $extra_packages_arg ]]; then
    cmd+=(--build-arg "EXTRA_PACKAGES=$extra_packages_arg")
  fi
  cmd+=("$SLOPTRAP_BUILD_CONTEXT")
  if $DRY_RUN; then
    run_or_print "${cmd[@]}"
    return
  fi

  local build_output
  if ! build_output=$("${cmd[@]}"); then
    return 1
  fi
  build_output=$(trim "$build_output")
  if [[ -n $build_output ]]; then
    comment_line "Image %s\n" "$build_output"
  fi
}

rebuild_image() {
  ensure_codex_binary
  if ! $DRY_RUN; then
    status_line "Rebuilding %s (no cache)\n" "$SLOPTRAP_IMAGE_NAME"
  fi
  local extra_packages_arg
  extra_packages_arg=$(normalize_package_list "$SLOPTRAP_PACKAGES_EXTRA_RESOLVED")
  local -a cmd=(
    "$CONTAINER_ENGINE" build --no-cache
    -t "$SLOPTRAP_IMAGE_NAME"
    -f "$SLOPTRAP_DOCKERFILE_PATH"
    --label "$SLOPTRAP_IMAGE_LABEL"
    --build-arg "BASE_PACKAGES=$SLOPTRAP_PACKAGES_BASE"
    --build-arg "CODEX_BIN=$SLOPTRAP_CODEX_BIN_NAME"
    --build-arg "CODEX_UID=$SLOPTRAP_CODEX_UID"
    --build-arg "CODEX_GID=$SLOPTRAP_CODEX_GID"
  )
  if [[ -n $extra_packages_arg ]]; then
    cmd+=(--build-arg "EXTRA_PACKAGES=$extra_packages_arg")
  fi
  cmd+=("$SLOPTRAP_BUILD_CONTEXT")
  if $DRY_RUN; then
    run_or_print "${cmd[@]}"
    return
  fi

  local build_output
  if ! build_output=$("${cmd[@]}"); then
    return 1
  fi
  build_output=$(trim "$build_output")
  if [[ -n $build_output ]]; then
    comment_line "Image %s\n" "$build_output"
  fi
}

build_if_missing() {
  if $DRY_RUN; then
    print_command "$CONTAINER_ENGINE" image inspect "$SLOPTRAP_IMAGE_NAME"
    return 0
  fi
  if "$CONTAINER_ENGINE" image inspect "$SLOPTRAP_IMAGE_NAME" >/dev/null 2>&1; then
    return 0
  fi
  build_image
}

stop_container() {
  if $DRY_RUN; then
    print_command "$CONTAINER_ENGINE" stop "$SLOPTRAP_CONTAINER_NAME"
    return 0
  fi
  "$CONTAINER_ENGINE" stop "$SLOPTRAP_CONTAINER_NAME" >/dev/null 2>&1 || true
}

clean_environment() {
  if ! $DRY_RUN; then
    status_line "Cleaning %s\n" "$PROJECT_NAME"
  fi
  local helper_root="$CODE_DIR/.sloptrap-ignores"
  if [[ -L $helper_root ]]; then
    error "$helper_root: helper directory may not be a symlink"
  fi
  assert_path_within_code_dir "$helper_root"
  stop_container
  if $DRY_RUN; then
    print_command "$CONTAINER_ENGINE" rm -f "$SLOPTRAP_CONTAINER_NAME"
    print_command "$CONTAINER_ENGINE" rmi "$SLOPTRAP_IMAGE_NAME"
    print_command rm -rf "$helper_root"
    return 0
  fi
  "$CONTAINER_ENGINE" rm -f "$SLOPTRAP_CONTAINER_NAME" >/dev/null 2>&1 || true
  "$CONTAINER_ENGINE" rmi "$SLOPTRAP_IMAGE_NAME" >/dev/null 2>&1 || true
  rm -rf "$helper_root"
}

prune_sloptrap_images() {
  if ! $DRY_RUN; then
    status_line "Pruning unused sloptrap images\n"
  fi
  local -a cmd=(
    "$CONTAINER_ENGINE" image prune --force --all
    --filter "label=$SLOPTRAP_IMAGE_LABEL"
  )
  run_or_print "${cmd[@]}"
}

run_codex_command() {
  local -a extra_args=("$@")
  local -a cmd=("${BASE_CONTAINER_CMD[@]}" "$SLOPTRAP_IMAGE_NAME")
  if [[ ${#CODEX_ARGS_ARRAY[@]} -gt 0 ]]; then
    cmd+=("${CODEX_ARGS_ARRAY[@]}")
  fi
  if [[ ${#extra_args[@]} -gt 0 ]]; then
    cmd+=("${extra_args[@]}")
  fi
  run_or_print "${cmd[@]}"
}

run_codex() {
  if ! $DRY_RUN; then
    status_line "Running %s\n" "$SLOPTRAP_IMAGE_NAME"
  fi
  run_codex_command
}

run_login_target() {
  if ! $DRY_RUN; then
    status_line "Login %s\n" "$SLOPTRAP_IMAGE_NAME"
  fi
  local -a cmd=("${BASE_CONTAINER_CMD[@]}" "$SLOPTRAP_IMAGE_NAME" login)
  run_or_print "${cmd[@]}"
}

run_shell_target() {
  if ! $DRY_RUN; then
    status_line "Shell %s\n" "$SLOPTRAP_IMAGE_NAME"
  fi
  local -a cmd=("${BASE_CONTAINER_CMD[@]}" --entrypoint /bin/bash "$SLOPTRAP_IMAGE_NAME")
  run_or_print "${cmd[@]}"
}

run_resume_target() {
  local session_id=$1
  if ! $DRY_RUN; then
    status_line "Resume %s (%s)\n" "$SLOPTRAP_IMAGE_NAME" "$session_id"
  fi
  run_codex_command resume "$session_id"
}

process_resume_target() {
  local session_id=$1
  if [[ -z $session_id ]]; then
    error "target 'resume' requires a session identifier"
  fi
  build_if_missing
  run_resume_target "$session_id"
}

dispatch_target() {
  local target=$1
  case "$target" in
    build)
      build_image
      ;;
    rebuild)
      rebuild_image
      ;;
    build-if-missing)
      build_if_missing
      ;;
    run)
      build_if_missing
      run_codex
      ;;
    login)
      build_if_missing
      ensure_codex_home_dir
      run_login_target
      ;;
    shell)
      build_if_missing
      run_shell_target
      ;;
    stop)
      stop_container
      ;;
    clean)
      clean_environment
      ;;
    prune)
      prune_sloptrap_images
      ;;
    *)
      error "unknown target '$target'"
      ;;
  esac
}

DRY_RUN=false
PRINT_CONFIG=false

while [[ $# -gt 0 ]]; do
  case "$1" in
    --dry-run)
      DRY_RUN=true
      shift
      ;;
    --print-config)
      PRINT_CONFIG=true
      shift
      ;;
    -h|--help)
      usage
      exit 0
      ;;
    --)
      shift
      break
      ;;
    -*)
      usage >&2
      error "unknown flag '$1'"
      ;;
    *)
      break
      ;;
  esac
done

if [[ $# -lt 1 ]]; then
  usage >&2
  exit 1
fi

CODE_DIR_INPUT=$1
shift

if [[ ! -d $CODE_DIR_INPUT ]]; then
  error "code directory '$CODE_DIR_INPUT' does not exist"
fi

CODE_DIR="$(cd "$CODE_DIR_INPUT" && pwd -P)"
if [[ $CODE_DIR == "/" ]]; then
  error "project root may not be '/'"
fi
MANIFEST_PATH="$CODE_DIR/$MANIFEST_BASENAME"

if [[ -f $MANIFEST_PATH ]]; then
  MANIFEST_PRESENT=true
  parse_manifest "$MANIFEST_PATH"
fi

PROJECT_NAME=${MANIFEST[name]-$(basename "$CODE_DIR")}
if [[ -z $PROJECT_NAME ]]; then
  error "$MANIFEST_PATH: project name resolved to empty string"
fi
if [[ ! $PROJECT_NAME =~ $VALID_NAME_REGEX ]]; then
  error "$MANIFEST_PATH: invalid project name '$PROJECT_NAME' (allowed: letters, digits, ., _, -)"
fi

select_codex_home "$CODE_DIR"
ensure_ignore_helper_root
IGNORE_STUB_BASE="$IGNORE_HELPER_ROOT/session-${BASHPID:-$$}"
resolve_sloptrap_ignore "$CODE_DIR"
resolve_container_workdir
NEED_LOGIN=false
if [[ $CODEX_HOME_BOOTSTRAP == true ]]; then
  NEED_LOGIN=true
elif [[ ! -f "$CODEX_HOME_HOST/auth.json" ]]; then
  NEED_LOGIN=true
fi

TARGETS=("$@")
if [[ ${#TARGETS[@]} -eq 0 ]]; then
  if [[ -n ${MANIFEST[default_targets]-} ]]; then
    read -r -a TARGETS <<< "${MANIFEST[default_targets]}"
  elif [[ -n ${MANIFEST[default_target]-} ]]; then
    read -r -a TARGETS <<< "${MANIFEST[default_target]}"
  else
    TARGETS=("run")
  fi
fi

DEFAULT_TARGETS=("${TARGETS[@]}")

PACKAGES_EXTRA=${MANIFEST[packages_extra]-}
if [[ -n ${MANIFEST[allow_host_network]-} ]]; then
  case "${MANIFEST[allow_host_network],,}" in
    1|true|yes)
      ALLOW_HOST_NETWORK=true
      ;;
    0|false|no)
      ALLOW_HOST_NETWORK=false
      ;;
    *)
      error "$MANIFEST_PATH: allow_host_network must be true or false (got '${MANIFEST[allow_host_network]}')"
      ;;
  esac
fi

forbidden_keys=(container_opts_extra security_opts_extra env_extra env_passthrough)
for forbidden_key in "${forbidden_keys[@]}"; do
  if [[ -n ${MANIFEST[$forbidden_key]-} ]]; then
    error "$MANIFEST_PATH: key '$forbidden_key' has been removed for security reasons"
  fi
done

if [[ -n $PACKAGES_EXTRA ]]; then
  ensure_safe_for_make "packages_extra" "$PACKAGES_EXTRA"
  validate_package_list "packages_extra" "$PACKAGES_EXTRA"
fi
CONTAINER_ENGINE="$(detect_container_engine)"
CODEX_ARGS_ARRAY=("${DEFAULT_CODEX_ARGS[@]}")
if [[ -n ${MANIFEST[codex_args]-} ]]; then
  ensure_safe_for_make "codex_args" "${MANIFEST[codex_args]}"
  declare -a manifest_codex_args=()
  read -r -a manifest_codex_args <<< "${MANIFEST[codex_args]}"
  CODEX_ARGS_ARRAY+=("${manifest_codex_args[@]}")
  unset -v manifest_codex_args
fi
declare -a sanitized_codex_args=()
declare -a sandbox_pair=()
codex_args_index=0
while [[ $codex_args_index -lt ${#CODEX_ARGS_ARRAY[@]} ]]; do
  if [[ ${CODEX_ARGS_ARRAY[$codex_args_index]} == "--sandbox" ]]; then
    if (( codex_args_index + 1 >= ${#CODEX_ARGS_ARRAY[@]} )); then
      error "$MANIFEST_PATH: '--sandbox' flag requires a mode (workspace-write or workspace-read-only)"
    fi
    sandbox_pair=(--sandbox "${CODEX_ARGS_ARRAY[$((codex_args_index + 1))]}")
    ((codex_args_index+=2))
    continue
  fi
  sanitized_codex_args+=("${CODEX_ARGS_ARRAY[$codex_args_index]}")
  ((codex_args_index+=1))
done
if [[ ${#sandbox_pair[@]} -gt 0 ]]; then
  sanitized_codex_args+=("${sandbox_pair[@]}")
fi
CODEX_ARGS_ARRAY=("${sanitized_codex_args[@]}")
unset -v sanitized_codex_args sandbox_pair codex_args_index
ensure_safe_sandbox "${CODEX_ARGS_ARRAY[@]}"
if [[ ${#CODEX_ARGS_ARRAY[@]} -gt 0 ]]; then
  CODEX_ARGS_DISPLAY=$(printf '%s ' "${CODEX_ARGS_ARRAY[@]}")
  CODEX_ARGS_DISPLAY=${CODEX_ARGS_DISPLAY% }
else
  CODEX_ARGS_DISPLAY=""
fi

prepare_ignore_mounts "$CODE_DIR"
prepare_container_runtime

if $PRINT_CONFIG; then
  print_config "$MANIFEST_PATH"
  exit 0
fi

AUTO_LOGIN=false
if [[ $NEED_LOGIN == true ]]; then
  AUTO_LOGIN=true
  for tgt in "${TARGETS[@]}"; do
    if [[ $tgt == "login" ]]; then
      AUTO_LOGIN=false
      break
    fi
  done
fi

if $AUTO_LOGIN; then
  if ! $DRY_RUN; then
    status_line "Codex login required (%s)\n" "$CODEX_HOME_HOST"
  fi
  ensure_codex_home_dir
  dispatch_target login
fi

target_index=0
while (( target_index < ${#TARGETS[@]} )); do
  current_target="${TARGETS[$target_index]}"
  if [[ $current_target == "resume" ]]; then
    if (( target_index + 1 >= ${#TARGETS[@]} )); then
      error "target 'resume' requires a session identifier"
    fi
    process_resume_target "${TARGETS[$((target_index + 1))]}"
    ((target_index+=2))
    continue
  fi
  dispatch_target "$current_target"
  ((target_index+=1))
done