#!/bin/bash

set -e

# Cartesia CLI installation script
# This script downloads and installs the latest version of the Cartesia CLI

REPO="cartesia-ai/cli"
BINARY_NAME="cartesia"
INSTALL_DIR="${INSTALL_DIR:-$HOME/.cartesia/bin}"

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# Print colored output
print_status() {
    echo -e "${GREEN}[INFO]${NC} $1"
}

print_warning() {
    echo -e "${YELLOW}[WARN]${NC} $1"
}

print_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

# Detect OS and architecture
detect_platform() {
    local os arch
    
    case "$(uname -s)" in
        Darwin*)    os="darwin" ;;
        Linux*)     os="linux" ;;
        *)          print_error "Unsupported operating system: $(uname -s)"; exit 1 ;;
    esac
    
    case "$(uname -m)" in
        x86_64|amd64)   arch="amd64" ;;
        arm64|aarch64)  arch="arm64" ;;
        *)              print_error "Unsupported architecture: $(uname -m)"; exit 1 ;;
    esac
    
    echo "${os}-${arch}"
}

# Get the latest release version from GitHub API
get_latest_version() {
    local latest_url="https://api.github.com/repos/${REPO}/releases/latest"
    
    if command -v curl >/dev/null 2>&1; then
        curl -s "${latest_url}" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' | sed 's/^v//'
    elif command -v wget >/dev/null 2>&1; then
        wget -qO- "${latest_url}" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' | sed 's/^v//'
    else
        print_error "Neither curl nor wget is available. Please install one of them."
        exit 1
    fi
}

# Add directory to PATH in shell profile
add_to_path() {
    local install_dir="$1"
    local shell_profile=""
    
    # Detect shell and profile file
    case "$SHELL" in
        */bash*)
            if [ -f "$HOME/.bashrc" ]; then
                shell_profile="$HOME/.bashrc"
            elif [ -f "$HOME/.bash_profile" ]; then
                shell_profile="$HOME/.bash_profile"
            elif [ -f "$HOME/.profile" ]; then
                shell_profile="$HOME/.profile"
            fi
            ;;
        */zsh*)
            if [ -f "$HOME/.zshrc" ]; then
                shell_profile="$HOME/.zshrc"
            elif [ -f "$HOME/.zprofile" ]; then
                shell_profile="$HOME/.zprofile"
            fi
            ;;
        */fish*)
            # Fish uses a different syntax, handle separately if needed
            shell_profile=""
            ;;
        *)
            if [ -f "$HOME/.profile" ]; then
                shell_profile="$HOME/.profile"
            fi
            ;;
    esac
    
    # Check if directory is already in PATH
    case ":$PATH:" in
        *":$install_dir:"*) 
            print_status "Directory $install_dir is already in PATH"
            return 0
            ;;
    esac
    
    # Add to PATH in shell profile
    if [ -n "$shell_profile" ] && [ -w "$shell_profile" ]; then
        if ! grep -q "export PATH.*$install_dir" "$shell_profile" 2>/dev/null; then
            echo "" >> "$shell_profile"
            echo "# Added by Cartesia CLI installer" >> "$shell_profile"
            echo "export PATH=\"$install_dir:\$PATH\"" >> "$shell_profile"
            print_status "Added $install_dir to PATH in $shell_profile"
            print_warning "Please restart your shell or run: source $shell_profile"
        else
            print_status "PATH entry already exists in $shell_profile"
        fi
    else
        print_warning "Could not automatically add to PATH. Please add the following to your shell profile:"
        print_warning "  export PATH=\"$install_dir:\$PATH\""
    fi
}

# Download and install the binary
install_binary() {
    local version="$1"
    local platform="$2"
    local archive_name="${BINARY_NAME}-${platform}.tar.gz"
    local download_url="https://github.com/${REPO}/releases/download/v${version}/${archive_name}"
    local temp_dir
    
    temp_dir=$(mktemp -d)
    trap "rm -rf ${temp_dir}" EXIT
    
    print_status "Downloading ${BINARY_NAME} v${version} for ${platform}..."
    
    if command -v curl >/dev/null 2>&1; then
        curl -sL "${download_url}" -o "${temp_dir}/${archive_name}"
    elif command -v wget >/dev/null 2>&1; then
        wget -q "${download_url}" -O "${temp_dir}/${archive_name}"
    fi
    
    if [ ! -f "${temp_dir}/${archive_name}" ]; then
        print_error "Failed to download ${archive_name}"
        exit 1
    fi
    
    print_status "Extracting archive..."
    tar -xzf "${temp_dir}/${archive_name}" -C "${temp_dir}"
    
    # Create install directory if it doesn't exist
    mkdir -p "${INSTALL_DIR}"
    
    # Install binary (no sudo needed for user directory)
    install -m 755 "${temp_dir}/${BINARY_NAME}" "${INSTALL_DIR}/${BINARY_NAME}"
    
    print_status "Successfully installed ${BINARY_NAME} to ${INSTALL_DIR}/${BINARY_NAME}"
}

# Verify installation
verify_installation() {
    if command -v "${BINARY_NAME}" >/dev/null 2>&1; then
        local installed_version
        installed_version=$("${BINARY_NAME}" version 2>/dev/null | head -n1 || echo "unknown")
        print_status "Installation verified: ${installed_version}"
        print_status ""
        print_status "Get started with: ${BINARY_NAME} auth login"
    else
        print_error "Installation failed. ${BINARY_NAME} not found in PATH."
        print_error "Make sure ${INSTALL_DIR} is in your PATH."
        exit 1
    fi
}

# Main installation flow
main() {
    print_status "Installing Cartesia CLI..."
    
    # Check for required tools
    if ! command -v tar >/dev/null 2>&1; then
        print_error "tar is required but not installed."
        exit 1
    fi
    
    # Detect platform
    local platform
    platform=$(detect_platform)
    print_status "Detected platform: ${platform}"
    
    # Get latest version
    local version
    version=$(get_latest_version)
    if [ -z "${version}" ]; then
        print_error "Failed to get latest version information"
        exit 1
    fi
    print_status "Latest version: v${version}"
    
    # Install binary
    install_binary "${version}" "${platform}"
    
    # Add to PATH
    add_to_path "${INSTALL_DIR}"
    
    # Verify installation
    verify_installation
}

# Handle command line arguments
case "${1:-}" in
    --help|-h)
        echo "Cartesia CLI Installation Script"
        echo ""
        echo "Usage: $0 [options]"
        echo ""
        echo "Options:"
        echo "  --help, -h     Show this help message"
        echo ""
        echo "Environment Variables:"
        echo "  INSTALL_DIR    Installation directory (default: ~/.cartesia/bin)"
        echo ""
        echo "Examples:"
        echo "  # Install to default location"
        echo "  curl -sSL https://raw.githubusercontent.com/cartesia-ai/cli/main/scripts/install.sh | bash"
        echo ""
        echo "  # Install to custom location"
        echo "  INSTALL_DIR=~/.local/bin curl -sSL https://raw.githubusercontent.com/cartesia-ai/cli/main/scripts/install.sh | bash"
        exit 0
        ;;
    *)
        main "$@"
        ;;
esac