codex-profiles 0.1.0

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

CODEX_DIR="$HOME/.codex"
AUTH="$CODEX_DIR/auth.json"
PROFILES="$CODEX_DIR/profiles"
USAGE="$PROFILES/usage.tsv"

mkdir -p "$PROFILES"
chmod 700 "$PROFILES"

usage() {
  echo "Usage:"
  echo "  cx save            Save current auth.json"
  echo "  cx load [id]       Load profile (default: oldest used)"
  echo "  cx list            List profiles by last used"
  echo "  cx current         Show current account_id"
  exit 1
}

account_id() {
  jq -r '.tokens.account_id // empty' "$AUTH"
}

now() {
  date +%s
}

touch "$USAGE"

update_usage() {
  local id="$1"
  local ts
  ts="$(now)"

  # remove existing entry
  grep -v "^$id[[:space:]]" "$USAGE" > "$USAGE.tmp" || true
  mv "$USAGE.tmp" "$USAGE"

  echo -e "$id\t$ts" >> "$USAGE"
}

oldest_profile() {
  sort -k2 -n "$USAGE" | head -n1 | cut -f1
}

[[ $# -eq 0 ]] && usage

case "$1" in
  save)
    [[ -f "$AUTH" ]] || { echo "No auth.json found"; exit 1; }

    ID="$(account_id)"
    [[ -n "$ID" ]] || { echo "account_id not found"; exit 1; }

    cp "$AUTH" "$PROFILES/$ID.json"
    update_usage "$ID"

    echo "Saved profile $ID"
    ;;

  load)
    if [[ -n "${2:-}" ]]; then
      ID="$2"
    else
      ID="$(oldest_profile)"
      [[ -n "$ID" ]] || { echo "No profiles available"; exit 1; }
      echo "Auto-selected oldest profile: $ID"
    fi

    SRC="$PROFILES/$ID.json"
    [[ -f "$SRC" ]] || { echo "Profile $ID not found"; exit 1; }

    cp "$SRC" "$AUTH"
    update_usage "$ID"

    echo "Loaded profile $ID"
    ;;

  list)
    printf "%-40s  %s\n" "ACCOUNT_ID" "LAST_USED"
    sort -k2 -n "$USAGE" | while read -r id ts; do
      printf "%-40s  %s\n" "$id" "$(date -d "@$ts")"
    done
    ;;

  current)
    [[ -f "$AUTH" ]] || { echo "No active auth"; exit 1; }
    account_id
    ;;

  *)
    usage
    ;;
esac