install.sh

#!/usr/bin/env bash
#
# codex-usage installer.
#
# One-liner:
#   curl -fsSL https://raw.githubusercontent.com/mbogdan0/codex-usage/main/install.sh | bash
#
# Installs the `codex-usage` command into ~/.local/bin and adds a shell alias.
# Sensible defaults; pass -y (or set CODEX_USAGE_YES=1) to skip confirmation.
#
# Overridable via env:
#   INSTALL_DIR   where the command is placed   (default: ~/.local/bin)
#   BRANCH        branch to download from       (default: main)

set -euo pipefail

REPO="mbogdan0/codex-usage"
BRANCH="${BRANCH:-main}"
INSTALL_DIR="${INSTALL_DIR:-$HOME/.local/bin}"
CMD_NAME="codex-usage"
RAW_URL="https://raw.githubusercontent.com/${REPO}/${BRANCH}/codex-usage.sh"

ASSUME_YES="${CODEX_USAGE_YES:-0}"
[ "${1:-}" = "-y" ] && ASSUME_YES=1

# ── Pretty output ────────────────────────────────────────
if [ -t 1 ]; then
  BOLD="$(printf '\033[1m')"; DIM="$(printf '\033[2m')"
  GREEN="$(printf '\033[32m')"; YELLOW="$(printf '\033[33m')"; RESET="$(printf '\033[0m')"
else
  BOLD=""; DIM=""; GREEN=""; YELLOW=""; RESET=""
fi
info()  { printf '%s\n' "$*"; }
ok()    { printf '%s✓%s %s\n' "$GREEN" "$RESET" "$*"; }
warn()  { printf '%s!%s %s\n' "$YELLOW" "$RESET" "$*"; }
die()   { printf 'Error: %s\n' "$*" >&2; exit 1; }

# ── Locate the source script (local clone or download) ───
resolve_source() {
  local self_dir
  self_dir="$(cd "$(dirname "${BASH_SOURCE[0]:-$0}")" 2>/dev/null && pwd || true)"

  if [ -n "$self_dir" ] && [ -f "$self_dir/codex-usage.sh" ]; then
    SRC="$self_dir/codex-usage.sh"          # running from a clone
    SRC_KIND="local"
  else
    SRC="$(mktemp -t codex-usage.XXXXXX)"    # piped via curl → download it
    SRC_KIND="download"
    if command -v curl >/dev/null 2>&1; then
      curl -fsSL "$RAW_URL" -o "$SRC" || die "download failed: $RAW_URL"
    elif command -v wget >/dev/null 2>&1; then
      wget -qO "$SRC" "$RAW_URL" || die "download failed: $RAW_URL"
    else
      die "need curl or wget to download the script"
    fi
    trap 'rm -f "$SRC"' EXIT
  fi
}

# ── Detect shell rc for the alias ────────────────────────
detect_rc() {
  case "$(basename "${SHELL:-}")" in
    zsh)  RC="$HOME/.zshrc" ;;
    bash) [ "$(uname)" = "Darwin" ] && RC="$HOME/.bash_profile" || RC="$HOME/.bashrc" ;;
    *)    RC="" ;;
  esac
}

resolve_source
detect_rc

TARGET="$INSTALL_DIR/$CMD_NAME"
ALIAS_LINE="alias ${CMD_NAME}=\"${TARGET}\""

info ""
info "${BOLD}codex-usage installer${RESET}"
info "  ${DIM}source :${RESET} $SRC_KIND"
info "  ${DIM}command:${RESET} $TARGET"
info "  ${DIM}alias  :${RESET} ${RC:-<manual — shell not detected>}"
info ""

if [ "$ASSUME_YES" != "1" ] && [ -e /dev/tty ]; then
  printf 'Proceed with these defaults? [Y/n] '
  read -r reply < /dev/tty || reply=""
  case "$reply" in [nN]*) info "Aborted."; exit 0 ;; esac
fi

# ── Install the command ──────────────────────────────────
mkdir -p "$INSTALL_DIR"
install -m 0755 "$SRC" "$TARGET" 2>/dev/null || { cp "$SRC" "$TARGET"; chmod 0755 "$TARGET"; }
ok "Installed $CMD_NAME → $TARGET"

# ── Wire up the alias (idempotent) ───────────────────────
if [ -n "$RC" ]; then
  if [ -f "$RC" ] && grep -q "alias ${CMD_NAME}=" "$RC"; then
    ok "Alias already present in $RC"
  else
    printf '\n# codex-usage\n%s\n' "$ALIAS_LINE" >> "$RC"
    ok "Added alias to $RC"
  fi
  ACTIVATE="source \"$RC\""
else
  warn "Could not detect your shell rc. Add this line manually:"
  info "    $ALIAS_LINE"
  ACTIVATE="add the alias above, then reload your shell"
fi

# ── Dependency check (script needs these at runtime) ─────
missing=""
for c in codex jq python3; do
  command -v "$c" >/dev/null 2>&1 || missing="$missing $c"
done
[ -n "$missing" ] && warn "Missing runtime dependencies:$missing"

info ""
ok "Done. To start using it now:"
info "    ${BOLD}${ACTIVATE}${RESET}"
info "    ${BOLD}${CMD_NAME}${RESET}"
info ""