#!/bin/sh

echo 'backing up previous log file to ~/.update-home-old.log'
mv ~/.update-home.log ~/.update-home-old.log &>> /dev/null

if ! test -d ~/.dotfiles; then
    echo '.dotfiles should be at ~/.dotfiles; reinstalling dotfiles at ~/.dotfiles...'
    git clone git@git.sr.ht:~jjanzen/.dotfiles ~/.dotfiles >> ~/.update-home.log 2>&1
fi

echo 'retrieving the latest changes (any unmerged local changes will be stashed)...'
{
    git stash
    git checkout main
    git pull --rebase
} >> ~/.update-home.log 2>&1

CWD=$(pwd)

if [ "$(uname)" = 'Darwin' ]; then
    echo 'detected Mac OS; installing Mac OS configuration...'
    cd ~/.dotfiles/macos/ || exit
elif [ "$(uname)" = 'Linux' ] && grep 'ID=gentoo' /etc/os-release; then
    echo 'detected Gentoo; installing Gentoo configuration...'
    cd ~/.dotfiles/gentoo/ || exit
else
    echo 'unsupported operating system'
    exit 1
fi

echo 'installing configuration files...'
find -- . -type f -name "*.org" | while read -r file; do
    echo "    installing $file..."
    emacs --batch "$file" -f package-initialize --eval '(org-babel-tangle)' >> ~/.update-home.log 2>&1
done

echo 'installing wallpaper...'
cp .wallpaper ~/.wallpaper
if [ "$(uname)" = 'Darwin' ]; then
    osascript -e "tell application \"System Events\" to tell every desktop to set picture to \"/$HOME/.wallpaper\" as POSIX file"
fi

echo 'installing fonts...'
fonts_changed=false
mkdir -p ~/.local/share/fonts
if ! test -d ~/.local/share/fonts/ComputerModern; then
    echo '    Computer Modern font missing. Installing...'
    tar xf .local/share/fonts/ComputerModern.tar.gz -C ~/.local/share/fonts >> ~/.update-home.log 2>&1
    fonts_changed=true
fi
if ! test -f ~/.local/share/fonts/NFM.ttf; then
    echo '    Nerd Font Mono font missing. Installing...'
    tar xf .local/share/fonts/NFM.tar.gz -C ~/.local/share/fonts >> ~/.update-home.log 2>&1
    fonts_changed=true
fi
if ! test -d ~/.local/share/fonts/SauceCodePro; then
    echo '    Source Code Pro Nerd Font missing. Installing...'
    tar xf .local/share/fonts/SauceCodePro.tar.gz -C ~/.local/share/fonts >> ~/.update-home.log 2>&1
    fonts_changed=true
fi

if [ $fonts_changed = true ]; then
    echo '   updating the font cache...'
    fc-cache -f >> ~/.update-home.log
fi

cd "$CWD" || exit