#!/bin/bash
#
# Wedding Phone Service Installer
# Installs the wedding phone as a systemd service
#

set -e

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

echo "=========================================="
echo "Wedding Phone Service Installer"
echo "=========================================="
echo ""

# Check if running as root
if [ "$EUID" -eq 0 ]; then
    echo -e "${RED}ERROR: Do not run this script as root or with sudo${NC}"
    echo "This script will prompt for sudo password when needed"
    exit 1
fi

# Get the directory where this script is located
SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
SERVICE_FILE="$SCRIPT_DIR/wedding-phone.service"

echo "Project directory: $SCRIPT_DIR"
echo ""

# Check if config.json exists
if [ ! -f "$SCRIPT_DIR/config.json" ]; then
    echo -e "${YELLOW}WARNING: config.json not found${NC}"
    echo "Creating config.json from config.example.json..."
    if [ -f "$SCRIPT_DIR/config.example.json" ]; then
        cp "$SCRIPT_DIR/config.example.json" "$SCRIPT_DIR/config.json"
        echo -e "${GREEN}✓ Created config.json${NC}"
        echo -e "${YELLOW}Please edit config.json to configure your system before starting the service${NC}"
        echo ""
    else
        echo -e "${RED}ERROR: config.example.json not found${NC}"
        exit 1
    fi
fi

# Check if UV is installed
if ! command -v uv &> /dev/null; then
    echo -e "${RED}ERROR: UV is not installed${NC}"
    echo "Install UV with: curl -LsSf https://astral.sh/uv/install.sh | sh"
    exit 1
fi

echo -e "${GREEN}✓ UV is installed${NC}"

# Install dependencies
echo ""
echo "Installing dependencies..."
cd "$SCRIPT_DIR"
make sync

echo -e "${GREEN}✓ Dependencies installed${NC}"
echo ""

# Find uv location
UV_PATH=$(which uv)
if [ -z "$UV_PATH" ]; then
    UV_PATH="$HOME/.local/bin/uv"
    if [ ! -f "$UV_PATH" ]; then
        echo -e "${RED}ERROR: Cannot find uv executable${NC}"
        echo "Checked: $(which uv), $HOME/.local/bin/uv"
        exit 1
    fi
fi

echo -e "${GREEN}✓ Found uv at: $UV_PATH${NC}"

# Update the service file with the correct path
echo "Configuring service file..."
TEMP_SERVICE="/tmp/wedding-phone.service"
CURRENT_USER=$(whoami)
USER_HOME=$(eval echo ~$CURRENT_USER)

cat "$SERVICE_FILE" | \
    sed "s|User=berwn|User=$CURRENT_USER|g" | \
    sed "s|Group=berwn|Group=$CURRENT_USER|g" | \
    sed "s|/home/berwn/wedding-phone|$SCRIPT_DIR|g" | \
    sed "s|/home/berwn/.local/bin/uv|$UV_PATH|g" | \
    sed "s|/home/berwn/.local/bin|$USER_HOME/.local/bin|g" \
    > "$TEMP_SERVICE"

echo -e "${GREEN}✓ Service file configured for user: $CURRENT_USER${NC}"
echo -e "${GREEN}✓ Working directory: $SCRIPT_DIR${NC}"
echo -e "${GREEN}✓ UV path: $UV_PATH${NC}"
echo ""

# Install the service
echo "Installing systemd service..."
sudo cp "$TEMP_SERVICE" /etc/systemd/system/wedding-phone.service
sudo systemctl daemon-reload

echo -e "${GREEN}✓ Service installed${NC}"
echo ""

# Ask if user wants to enable and start the service
read -p "Do you want to enable and start the service now? (y/n) " -n 1 -r
echo ""
if [[ $REPLY =~ ^[Yy]$ ]]; then
    echo "Enabling service to start on boot..."
    sudo systemctl enable wedding-phone.service
    echo -e "${GREEN}✓ Service enabled${NC}"

    echo ""
    echo "Starting service..."
    sudo systemctl start wedding-phone.service
    echo -e "${GREEN}✓ Service started${NC}"

    echo ""
    echo "Service status:"
    sudo systemctl status wedding-phone.service --no-pager
else
    echo ""
    echo "Service installed but not started."
    echo "To enable and start later, run:"
    echo "  sudo systemctl enable wedding-phone.service"
    echo "  sudo systemctl start wedding-phone.service"
fi

echo ""
echo "=========================================="
echo "Installation Complete!"
echo "=========================================="
echo ""
echo "Useful commands:"
echo "  Start service:   sudo systemctl start wedding-phone"
echo "  Stop service:    sudo systemctl stop wedding-phone"
echo "  Restart service: sudo systemctl restart wedding-phone"
echo "  View logs:       sudo journalctl -u wedding-phone -f"
echo "  Service status:  sudo systemctl status wedding-phone"
echo "  Disable service: sudo systemctl disable wedding-phone"
echo ""

# Clean up
rm -f "$TEMP_SERVICE"