#!/bin/bash

# Check that script is not running as root
if [ "$EUID" -eq 0 ]; then
    echo "Error: This script should not be run as root"
    echo "Please run this script as the normal user that will be used to run the music players"
    echo "The script will use 'sudo' when elevated privileges are needed"
    exit 1
fi

# Check if running Debian 13/Trixie
if [ ! -f /etc/debian_version ]; then
    echo "Error: This script requires Debian"
    exit 1
fi

debian_version=$(cat /etc/debian_version)
if ! echo "$debian_version" | grep -q "^13\." && ! grep -q "trixie" /etc/os-release 2>/dev/null; then
    echo "Current Debian version: $debian_version"
    echo "This script requires Debian 13 (Trixie)"
    
    # Check if we're on a compatible version for upgrade
    if echo "$debian_version" | grep -q "^12\." || grep -q "bookworm" /etc/os-release 2>/dev/null; then
        echo ""
        echo "You appear to be running Debian 12 (Bookworm)"
        echo "An upgrade script is available to upgrade to Debian 13 (Trixie)"
        echo ""
        echo "Would you like to run the upgrade script now? [y/N]"
        read -r response
        
        if [[ "$response" =~ ^[Yy]$ ]]; then
            if [ -f "./upgrade-to-trixie" ]; then
                echo "Starting upgrade script..."
                ./upgrade-to-trixie
                exit $?
            else
                echo "Error: upgrade-to-trixie script not found in current directory"
                echo "Please run: ./upgrade-to-trixie manually"
                exit 1
            fi
        else
            echo "To upgrade manually, run: ./upgrade-to-trixie"
            exit 1
        fi
    else
        echo "Automatic upgrade is only supported from Debian 12 (Bookworm)"
        echo "Please manually upgrade to Debian 13 (Trixie) and run this script again"
        exit 1
    fi
fi

echo "Detected Debian 13/Trixie - proceeding with installation"

# Add HiFiBerry repository if not already present
if ! grep -q "debianrepo.hifiberry.com" /etc/apt/sources.list.d/hifiberry.list 2>/dev/null; then
    echo "Adding HiFiBerry repository..."
    echo "deb [signed-by=/usr/share/keyrings/hifiberry-archive-keyring.gpg] http://debianrepo.hifiberry.com trixie main" | sudo tee /etc/apt/sources.list.d/hifiberry.list
    wget -O- "https://keys.openpgp.org/vks/v1/by-fingerprint/4192E989F186E770B273F98B7997FC464E443CFA" | gpg --dearmor | sudo tee /usr/share/keyrings/hifiberry-archive-keyring.gpg > /dev/null
else
    echo "HiFiBerry repository already configured"
fi

sudo apt update -y
sudo apt install -y hbos-minimal

# Base configuration
sudo config-configtxt --default-config

# Check if $USER is set, otherwise set it
if [ -z "$USER" ]; then
    echo "USER environment variable is not set, defaulting to 'hifiberry'"
    USER=`whoami`
fi

# Write current username to /etc/hifiberry.user
echo "$USER" | sudo tee /etc/hifiberry.user

# Linger for current user
echo "Enabling linger for user $USER"
sudo loginctl enable-linger "$USER"

# Configure user manager to forward logs to system journal
echo "Configuring user manager to forward logs to system journal..."
sudo mkdir -p /etc/systemd/user.conf.d
sudo tee /etc/systemd/user.conf.d/journal.conf > /dev/null <<EOF
[Manager]
DefaultStandardOutput=journal
DefaultStandardError=journal
EOF

# Reload the systemd user manager
echo "Reloading systemd user manager..."
systemctl --user daemon-reexec