#!/bin/bash
set -euo pipefail

# Master installation script for Record Player Pi → Sonos AUX
# Usage: curl -fsSL https://git.geertrademakers.nl/master/sonos-aux-recordplayer-pi/raw/branch/master/install.sh | bash
# Or: wget -qO- https://git.geertrademakers.nl/master/sonos-aux-recordplayer-pi/raw/branch/master/install.sh | bash

REPO_URL="https://git.geertrademakers.nl/master/sonos-aux-recordplayer-pi.git"
INSTALL_DIR="/home/pi/sonos-aux-recordplayer-pi"
USER_HOME="/home/pi"

log() {
    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*" >&2
}

error() {
    log "❌ ERROR: $*"
    exit 1
}

success() {
    log "✅ $*"
}

info() {
    log "ℹ️  $*"
}

# Check if running as root for certain operations
check_sudo() {
    if ! sudo -n true 2>/dev/null; then
        info "This script requires sudo privileges. You may be prompted for your password."
    fi
}

# Detect if we're on a Raspberry Pi
check_pi() {
    if [ ! -f /proc/device-tree/model ] || ! grep -q "Raspberry Pi" /proc/device-tree/model 2>/dev/null; then
        info "⚠️  Warning: This doesn't appear to be a Raspberry Pi. Continuing anyway..."
    fi
}

# Install prerequisites
install_prerequisites() {
    info "Installing prerequisites..."
    
    sudo apt-get update -qq
    sudo apt-get install -y darkice icecast2 alsa-utils curl wget git || error "Failed to install prerequisites"
    
    success "Prerequisites installed"
}

# Clone or update repository
setup_repo() {
    if [ -d "$INSTALL_DIR" ]; then
        info "Repository exists, updating..."
        cd "$INSTALL_DIR"
        git pull || error "Failed to update repository"
    else
        info "Cloning repository..."
        git clone "$REPO_URL" "$INSTALL_DIR" || error "Failed to clone repository"
        cd "$INSTALL_DIR"
    fi
    
    success "Repository ready"
}

# Fix USB audio to always be card 0
fix_usb_audio() {
    info "Configuring USB audio as card 0..."
    
    # Blacklist built-in audio
    if ! grep -q "blacklist snd_bcm2835" /etc/modprobe.d/raspi-blacklist.conf 2>/dev/null; then
        echo "blacklist snd_bcm2835" | sudo tee -a /etc/modprobe.d/raspi-blacklist.conf >/dev/null
    fi
    
    # Fix USB audio index
    if [ -f /lib/modprobe.d/aliases.conf ]; then
        sudo sed -i 's/^options snd-usb-audio index=-2/#options snd-usb-audio index=-2/' /lib/modprobe.d/aliases.conf
    fi
    
    success "USB audio configuration updated (reboot required for full effect)"
}

# Deploy files
deploy_files() {
    info "Deploying files..."
    
    # Copy wrapper script
    sudo cp "$INSTALL_DIR/03-darkice-wrapper.sh" "$USER_HOME/darkice-wrapper.sh"
    sudo chmod +x "$USER_HOME/darkice-wrapper.sh"
    sudo chown root:audio "$USER_HOME/darkice-wrapper.sh"
    sudo chmod 755 "$USER_HOME/darkice-wrapper.sh"
    
    # Copy systemd service
    sudo cp "$INSTALL_DIR/04-sonos-aux.service" /etc/systemd/system/sonos-aux.service
    
    # Copy config if it doesn't exist
    if [ ! -f "$USER_HOME/darkice.cfg" ]; then
        cp "$INSTALL_DIR/darkice.cfg.example" "$USER_HOME/darkice.cfg"
        info "📝 Created darkice.cfg - please edit password and mountPoint!"
    else
        info "darkice.cfg already exists, skipping..."
    fi
    
    success "Files deployed"
}

# Setup Icecast
setup_icecast() {
    info "Setting up Icecast2..."
    
    sudo systemctl enable icecast2 || true
    sudo systemctl start icecast2 || true
    
    success "Icecast2 configured"
}

# Setup systemd service
setup_service() {
    info "Setting up systemd service..."
    
    sudo systemctl daemon-reload
    sudo systemctl enable sonos-aux.service
    
    success "Systemd service enabled"
}

# Main installation
main() {
    log "🚀 Starting Record Player Pi → Sonos AUX installation..."
    
    check_sudo
    check_pi
    
    install_prerequisites
    setup_repo
    fix_usb_audio
    deploy_files
    setup_icecast
    setup_service
    
    echo ""
    success "Installation complete!"
    echo ""
    info "Next steps:"
    echo "  1. Edit darkice.cfg: nano $USER_HOME/darkice.cfg"
    echo "     - Change 'password' to your Icecast source password"
    echo "     - Change 'mountPoint' if desired"
    echo ""
    echo "  2. Reboot: sudo reboot"
    echo ""
    echo "  3. After reboot, verify:"
    echo "     - journalctl -u sonos-aux.service -f"
    echo "     - Or run: $INSTALL_DIR/verify.sh"
    echo ""
    echo "  4. Add to Sonos: http://<pi-ip>:8000/rapi.mp3"
    echo ""
}

# Run main function
main "$@"