#!/bin/sh
set -e

REPO="charlie0077/tmux-manager"
BIN="tmux-manager"
INSTALL_DIR="/usr/local/bin"

# Detect OS
OS=$(uname -s | tr '[:upper:]' '[:lower:]')
case "$OS" in
  linux)  OS="linux" ;;
  darwin) OS="darwin" ;;
  *)
    echo "Unsupported OS: $OS"
    exit 1
    ;;
esac

# Detect arch
ARCH=$(uname -m)
case "$ARCH" in
  x86_64)          ARCH="amd64" ;;
  aarch64 | arm64) ARCH="arm64" ;;
  *)
    echo "Unsupported architecture: $ARCH"
    exit 1
    ;;
esac

# Get latest release tag
LATEST=$(curl -fsSL "https://api.github.com/repos/${REPO}/releases/latest" \
  | grep '"tag_name"' | head -1 | sed 's/.*"tag_name": *"\([^"]*\)".*/\1/')

if [ -z "$LATEST" ]; then
  echo "Could not determine latest release. Check https://github.com/${REPO}/releases"
  exit 1
fi

FILENAME="${BIN}_${OS}_${ARCH}"
URL="https://github.com/${REPO}/releases/download/${LATEST}/${FILENAME}"

echo "Installing ${BIN} ${LATEST} (${OS}/${ARCH})..."

TMP=$(mktemp)
curl -fsSL "$URL" -o "$TMP"
chmod +x "$TMP"

if [ -w "$INSTALL_DIR" ]; then
  mv "$TMP" "${INSTALL_DIR}/${BIN}"
else
  sudo mv "$TMP" "${INSTALL_DIR}/${BIN}"
fi

echo "Installed to ${INSTALL_DIR}/${BIN}"
echo "Run: ${BIN}"