#!/bin/bash

set -e

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

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

    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"
}

backup_and_link "$DOTFILES/config/starship.toml" "$HOME/.config/starship.toml"
backup_and_link "$DOTFILES/config/profile"       "$HOME/.profile"
backup_and_link "$DOTFILES/config/xinitrc"       "$HOME/.xinitrc"
backup_and_link "$DOTFILES/vimrc"                "$HOME/.vimrc"
backup_and_link "$DOTFILES/config/wezterm"       "$HOME/.config/wezterm"
backup_and_link "$DOTFILES/config/fish"          "$HOME/.config/fish"
backup_and_link "$DOTFILES/config/tmux"          "$HOME/.config/tmux"
backup_and_link "$DOTFILES/config/senpai"        "$HOME/.config/senpai"
backup_and_link "$DOTFILES/config/kanata"        "$HOME/.config/kanata"
backup_and_link "$DOTFILES/config/nyxt"          "$HOME/.config/nyxt"
backup_and_link "$DOTFILES/config/yazi"          "$HOME/.config/yazi"

backup_and_link "$DOTFILES/config/rofi"          "$HOME/.config/rofi"

# GTK themes
backup_and_link "$DOTFILES/config/gtk-2.0/gtkrc" "$HOME/.gtkrc-2.0"
backup_and_link "$DOTFILES/config/gtk-3.0"        "$HOME/.config/gtk-3.0"
backup_and_link "$DOTFILES/config/gtk-4.0"        "$HOME/.config/gtk-4.0"

# Zed: link individual files to preserve extra live data (themes, backups, etc.)
mkdir -p "$HOME/.config/zed"
for src in "$DOTFILES/config/zed/"*; do
    dst="$HOME/.config/zed/$(basename "$src")"
    backup_and_link "$src" "$dst"
done

# System-level links (requires root)
if [ "$EUID" -eq 0 ]; then
    echo ""
    echo "=== system links ==="
    backup_and_link "$DOTFILES/config/kanata/rc.kanata" "/etc/rc.d/rc.kanata"
    chmod +x /etc/rc.d/rc.kanata

    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
else
    echo ""
    echo "skipping system links (run as root to install /etc/rc.d/rc.kanata and hook into rc.local)"
fi