#!/bin/sh
set -e

# Umono CLI Installer
# Usage: curl -fsSL https://umono.io/install.sh | sh

REPO="umono-cms/cli"
INSTALL_DIR="$HOME/.local/bin"
BINARY_NAME="umono"

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
NC='\033[0m' # No Color

info() {
    printf "${GREEN}==>${NC} %s\n" "$1"
}

warn() {
    printf "${YELLOW}warning:${NC} %s\n" "$1"
}

error() {
    printf "${RED}error:${NC} %s\n" "$1" >&2
    exit 1
}

# Detect OS
detect_os() {
    case "$(uname -s)" in
        Linux*)  echo "linux" ;;
        Darwin*) echo "darwin" ;;
        *)       error "Unsupported operating system: $(uname -s)" ;;
    esac
}

# Detect architecture
detect_arch() {
    case "$(uname -m)" in
        x86_64)  echo "amd64" ;;
        amd64)   echo "amd64" ;;
        arm64)   echo "arm64" ;;
        aarch64) echo "arm64" ;;
        *)       error "Unsupported architecture: $(uname -m)" ;;
    esac
}

# Get latest release version from GitHub
get_latest_version() {
    if command -v curl > /dev/null 2>&1; then
        curl -fsSL "https://api.github.com/repos/${REPO}/releases/latest" | grep '"tag_name"' | sed -E 's/.*"([^"]+)".*/\1/'
    elif command -v wget > /dev/null 2>&1; then
        wget -qO- "https://api.github.com/repos/${REPO}/releases/latest" | grep '"tag_name"' | sed -E 's/.*"([^"]+)".*/\1/'
    else
        error "curl or wget is required"
    fi
}

# Download file
download() {
    url="$1"
    output="$2"
    
    if command -v curl > /dev/null 2>&1; then
        curl -fsSL "$url" -o "$output"
    elif command -v wget > /dev/null 2>&1; then
        wget -q "$url" -O "$output"
    else
        error "curl or wget is required"
    fi
}

# Check if directory is in PATH
check_path() {
    case ":$PATH:" in
        *":$1:"*) return 0 ;;
        *) return 1 ;;
    esac
}

main() {
    info "Installing Umono CLI..."
    
    OS=$(detect_os)
    ARCH=$(detect_arch)
    
    info "Detected platform: ${OS}/${ARCH}"
    
    # Get latest version
    VERSION=$(get_latest_version)
    if [ -z "$VERSION" ]; then
        error "Failed to get latest version"
    fi
    
    info "Latest version: ${VERSION}"
    
    # Create install directory if it doesn't exist
    mkdir -p "$INSTALL_DIR"
    
    # Build download URL
    ARCHIVE_NAME="umono-cli_${VERSION}_${OS}_${ARCH}.tar.gz"
    DOWNLOAD_URL="https://github.com/${REPO}/releases/download/${VERSION}/${ARCHIVE_NAME}"
    
    # Create temp directory
    TMP_DIR=$(mktemp -d)
    trap 'rm -rf "$TMP_DIR"' EXIT
    
    # Download
    info "Downloading ${ARCHIVE_NAME}..."
    download "$DOWNLOAD_URL" "$TMP_DIR/archive.tar.gz"
    
    # Extract
    info "Extracting..."
    tar -xzf "$TMP_DIR/archive.tar.gz" -C "$TMP_DIR"
    
    # Install
    info "Installing to ${INSTALL_DIR}..."
    mv "$TMP_DIR/$BINARY_NAME" "$INSTALL_DIR/$BINARY_NAME"
    chmod +x "$INSTALL_DIR/$BINARY_NAME"
    
    # Verify installation
    printf "\n"
    info "Umono CLI installed successfully!"
    printf "\n"
    echo "  Version: ${VERSION}"
    echo "  Path:    ${INSTALL_DIR}/${BINARY_NAME}"
    printf "\n"
    
    # Check PATH
    if ! check_path "$INSTALL_DIR"; then
        warn "$INSTALL_DIR is not in your PATH"
        printf "\n"
        echo "Add this to your shell config (~/.bashrc, ~/.zshrc, etc.):"
        printf "\n"
        echo "  export PATH=\"\$HOME/.local/bin:\$PATH\""
        printf "\n"
        echo "Then restart your terminal or run: source ~/.bashrc"
        printf "\n"
    else
        echo "Get started:"
        echo "  umono create my-website"
        printf "\n"
    fi
}

main