#!/bin/bash

# Run this as root to install system-level config from dotfiles.
# Usage: sudo ./install-system.sh

set -e

DOTFILES="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

if [ "$EUID" -ne 0 ]; then
    echo "please run as root"
    exit 1
fi

backup_and_link() {
    local src="$1"
    local dst="$2"

    mkdir -p "$(dirname "$dst")"

    if [ -L "$dst" ]; then
        echo "already a symlink, skipping: $dst"
        return
    fi

    if [ -e "$dst" ]; then
        echo "backing up: $dst -> $dst.bak"
        mv "$dst" "$dst.bak"
    fi

    echo "linking: $dst -> $src"
    ln -s "$src" "$dst"
}

# Touchpad palm detection
backup_and_link "$DOTFILES/config/xorg.conf.d/70-touchpad.conf" "/etc/X11/xorg.conf.d/70-touchpad.conf"

# Kanata key remapper
backup_and_link "$DOTFILES/config/kanata/rc.kanata" "/etc/rc.d/rc.kanata"
chmod +x /etc/rc.d/rc.kanata

# Tailscale daemon
backup_and_link "$DOTFILES/config/tailscale/rc.tailscale" "/etc/rc.d/rc.tailscale"
chmod +x /etc/rc.d/rc.tailscale
mkdir -p /var/lib/tailscale
mkdir -p /var/run/tailscale

# autofs config
backup_and_link "$DOTFILES/config/autofs/auto.master" "/etc/auto.master"
backup_and_link "$DOTFILES/config/autofs/auto.mnt" "/etc/auto.mnt"

# MPD rc script
chmod +x /etc/rc.d/rc.autofs
backup_and_link "$DOTFILES/config/mpd/rc.mpd" "/etc/rc.d/rc.mpd"
chmod +x /etc/rc.d/rc.mpd
mkdir -p /mnt

# NetworkManager wifi power saving fix
backup_and_link "$DOTFILES/config/NetworkManager/wifi-powersave-off.conf" "/etc/NetworkManager/conf.d/wifi-powersave-off.conf"

if ! grep -q "rc.kanata" /etc/rc.d/rc.local; then
    echo "" >> /etc/rc.d/rc.local
    echo "# Start kanata key remapper" >> /etc/rc.d/rc.local
    echo "if [ -x /etc/rc.d/rc.kanata ]; then" >> /etc/rc.d/rc.local
    echo "    /etc/rc.d/rc.kanata start" >> /etc/rc.d/rc.local
    echo "fi" >> /etc/rc.d/rc.local
    echo "added kanata to rc.local"
else
    echo "rc.local already has kanata entry, skipping"
fi

# Add boot output logging if not present
if ! grep -q "tee /var/log/rc.local.log" /etc/rc.d/rc.local; then
    # Insert logging line after the shebang/header
    sed -i '/^#.*Local system/a\\n# Log all boot output to file while still showing on console\nexec > >(tee /var/log/rc.local.log) 2>&1' /etc/rc.d/rc.local
    echo "added boot logging to rc.local"
else
    echo "rc.local already has boot logging, skipping"
fi

# Add tailscale, autofs, mpd to rc.local if not present
if ! grep -q "rc.tailscale" /etc/rc.d/rc.local; then
    cat >> /etc/rc.d/rc.local << 'RCEOF'

# Start tailscale daemon
if [ -x /etc/rc.d/rc.tailscale ]; then
    /etc/rc.d/rc.tailscale start
fi

# Start autofs (handles NFS mounts on demand)
if [ -x /etc/rc.d/rc.autofs ]; then
    /etc/rc.d/rc.autofs start
fi

# Start MPD (autofs will mount /mnt/media on first access)
if [ -x /etc/rc.d/rc.mpd ]; then
    /etc/rc.d/rc.mpd start
fi
RCEOF
    echo "added tailscale/autofs/mpd to rc.local"
else
    echo "rc.local already has tailscale entry, skipping"
fi

echo ""
echo "done. reboot or restart X for xorg changes to take effect."