#!/usr/bin/env bash
# eximagent installer — picks the right binary for your platform.
# Usage:
#   curl -fsSL https://raw.githubusercontent.com/EximAgent/cli/main/install.sh | sh
#   curl -fsSL https://raw.githubusercontent.com/EximAgent/cli/main/install.sh | EXIMAGENT_VERSION=v0.0.36 sh
set -euo pipefail
INSTALL_DIR="${EXIMAGENT_INSTALL_DIR:-${HOME}/.eximagent/bin}"
SYMLINK_DIR="${EXIMAGENT_SYMLINK_DIR:-/usr/local/bin}"
GITHUB_REPO="EximAgent/cli"
os=""
case "$(uname -s)" in
  Darwin) os="darwin" ;;
  Linux) os="linux" ;;
  MINGW*|MSYS*|CYGWIN*)
    echo "[eximagent] Windows detected — bash installer is best-effort; the supported path is:" >&2
    echo "    irm https://install.eximagent.ai/install.ps1 | iex   (PowerShell)" >&2
    echo "    npm i -g eximagent                                   (Node 20+)" >&2
    os="windows" ;;
  *) echo "[eximagent] unsupported OS: $(uname -s)" >&2; exit 1 ;;
esac
arch=""
case "$(uname -m)" in
  arm64|aarch64) arch="arm64" ;;
  x86_64|amd64) arch="x64" ;;
  *) echo "[eximagent] unsupported arch: $(uname -m)" >&2; exit 1 ;;
esac
target="${os}-${arch}"
[ "${os}" = "windows" ] && target="${target}.exe"
if [ -z "${EXIMAGENT_VERSION:-}" ]; then
  if command -v curl >/dev/null 2>&1; then
    tag=$(curl -fsSL "https://api.github.com/repos/${GITHUB_REPO}/releases/latest" | sed -n 's/.*"tag_name":[[:space:]]*"\([^"]*\)".*/\1/p' | head -1)
  else
    tag=$(wget -qO- "https://api.github.com/repos/${GITHUB_REPO}/releases/latest" | sed -n 's/.*"tag_name":[[:space:]]*"\([^"]*\)".*/\1/p' | head -1)
  fi
  [ -z "${tag}" ] && { echo "[eximagent] could not resolve latest release tag" >&2; exit 1; }
else
  tag="${EXIMAGENT_VERSION}"
fi
url="https://github.com/${GITHUB_REPO}/releases/download/${tag}/eximagent-${target}"
mkdir -p "${INSTALL_DIR}"
dest="${INSTALL_DIR}/eximagent-${target}"
echo "[eximagent] fetching ${target} from ${tag}..." >&2
if command -v curl >/dev/null 2>&1; then
  curl -fsSL "${url}" -o "${dest}"
elif command -v wget >/dev/null 2>&1; then
  wget -qO "${dest}" "${url}"
else
  echo "[eximagent] need curl or wget" >&2; exit 1
fi
chmod +x "${dest}"
shim="${INSTALL_DIR}/eximagent"
ln -sf "${dest}" "${shim}"
if [ -w "${SYMLINK_DIR}" ]; then
  ln -sf "${shim}" "${SYMLINK_DIR}/eximagent"
  echo "[eximagent] installed → ${SYMLINK_DIR}/eximagent" >&2
else
  echo "[eximagent] installed → ${shim}" >&2
  echo "[eximagent] add ${INSTALL_DIR} to PATH, or run: sudo ln -sf ${shim} ${SYMLINK_DIR}/eximagent" >&2
fi
echo "[eximagent] try: eximagent --version && eximagent login" >&2