#!/bin/sh
set -e
REPO="Himan-D/hystersis"
echo "Hystersis installer — https://code.hystersis.com"
echo "Resolving latest release for $REPO ..."

# Detect OS/ARCH -> artifact name matching .github/workflows/release.yml
OS=$(uname -s)
ARCH=$(uname -m)
case "${OS}-${ARCH}" in
  Darwin-arm64) BINARY="hystersis-macos-arm64" ;;
  Darwin-x86_64) BINARY="hystersis-macos-x64" ;;
  Linux-x86_64) BINARY="hystersis-linux-x64" ;;
  Linux-aarch64|Linux-arm64) BINARY="hystersis-linux-arm64" ;;
  *) echo "Unsupported platform: ${OS}-${ARCH}"; echo "Try: cargo install --git https://github.com/${REPO}"; exit 1 ;;
esac

# Try to get latest tag; handle no releases gracefully
API="https://api.github.com/repos/${REPO}/releases/latest"
VERSION=""
if command -v curl >/dev/null 2>&1; then
  VERSION=$(curl -fsSL "$API" 2>/dev/null | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' || true)
elif command -v wget >/dev/null 2>&1; then
  VERSION=$(wget -qO- "$API" 2>/dev/null | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' || true)
fi

if [ -z "$VERSION" ]; then
  echo ""
  echo "No published release found yet for ${REPO}."
  echo "Install from source (until first release is published):"
  echo "  cargo install --git https://github.com/${REPO} --package xai-hystersis-pager-bin --bin xai-hystersis-pager"
  echo "  # then: hystersis --help  (binary is xai-hystersis-pager)"
  echo ""
  echo "Or wait for: https://github.com/${REPO}/releases"
  echo "Installer is reachable at https://code.hystersis.com/install.sh — will auto-install once a release exists."
  exit 0
fi

URL="https://github.com/${REPO}/releases/download/${VERSION}/${BINARY}"
DEST="/usr/local/bin/hystersis"
echo "→ Downloading ${BINARY} ${VERSION} ..."
echo "  $URL"
# Need sudo for /usr/local/bin; fallback to $HOME/.local/bin
if [ -w "/usr/local/bin" ]; then
  curl -fsSL "$URL" -o "$DEST" && chmod +x "$DEST" && echo "✅ Installed to $DEST" && "$DEST" --version || hystersis --version || true
else
  mkdir -p "$HOME/.local/bin"
  DEST="$HOME/.local/bin/hystersis"
  curl -fsSL "$URL" -o "$DEST" && chmod +x "$DEST" && echo "✅ Installed to $DEST (add ~/.local/bin to PATH)" && "$DEST" --version || true
fi