#!/bin/bash

SANDBOX_PATH="/tmp/.dotfiles-install-$(date +%H-%M-%s)"
TARGET_PATH="$HOME"


SUB="$(pwd)/home/user"


_die() {
    echo "$0: $1" >&2
    exit $2
}

test "$0" = "./install" || _die "Error: Please, run this file from root of dotfiles, like this './install.sh install TARGET" 1


_die_if_installed() {
    if [ -e "$1" ]; then
        _die "Already installed" 1
    fi
}

_link_files_in_sandbox() {
    mkdir "$SANDBOX_PATH"
    for target in "$@"; do
        echo "installing: $target"
        if [ ! "$(dirname "$target")" = "." ]; then
            mkdir -p "$SANDBOX_PATH/$(dirname "$target")"
        fi
        ln -sT "$SUB/$target" "$SANDBOX_PATH/$target"
    done
}

_compare_sandbox_to_home() {
    local comparisons="$(diff -rq "$SANDBOX_PATH" "$TARGET_PATH")"
    echo "$comparisons" | grep -vE "^Only in .+"
}

_merge_sandbox_to_home() {
    cp -RTnP "$SANDBOX_PATH" "$TARGET_PATH"
}

__install_from_sandbox() {

    local comparisons="$(_compare_sandbox_to_home)"

    if [ -n "$comparisons" ]; then
        echo "$comparisons" >&2
        echo "Reverting..." >&2
        rm -rf "$SANDBOX_PATH"
        _die "Found conflicting files. Exiting" 1
    fi

    echo "Merging to home..."
    _merge_sandbox_to_home
    rm -rf "$SANDBOX_PATH"
}

cmd_bash() {
    _link_files_in_sandbox ".subbash" ".bashrc" ".profile"
    __install_from_sandbox
}

cmd_zsh() {

    _link_files_in_sandbox ".subbash" ".subzsh" ".zshrc" ".zprofile" ".zfunc" ".zlogout"

    mkdir "$SANDBOX_PATH/.subzsh/plugins"
    git clone https://github.com/zsh-users/zsh-autosuggestions     "$SANDBOX_PATH/.subzsh/plugins/zsh-autosuggestions"
    git clone https://github.com/zsh-users/zsh-syntax-highlighting "$SANDBOX_PATH/.subzsh/plugins/zsh-syntax-highlighting"
    git clone https://github.com/hlissner/zsh-autopair             "$SANDBOX_PATH/.subzsh/plugins/hlissner/zsh-autopair"
    git clone https://github.com/unixorn/fzf-zsh-plugin.git        "$SANDBOX_PATH/.subzsh/plugins/unixorn/fzf-zsh-plugin" && \
        mkdir -p "$SANDBOX_PATH/.local/bin" && \
        ln -s "$SANDBOX_PATH"/.subzsh/plugins/unixorn/fzf-zsh-plugin/bin/* "$SANDBOX_PATH/.local/bin"
    __install_from_sandbox
}


cmd_tmux() {
    _link_files_in_sandbox ".tmux.conf"
    __install_from_sandbox
}

cmd_alacritty() {
    _link_files_in_sandbox ".config/alacritty"
    __install_from_sandbox
}

cmd_nvim() {
    echo "sudo pacman -S npm ctags fzf glow; mkdir ~/.npm-global; npm config set prefix '~/.npm-global'"

    _link_files_in_sandbox ".config/nvim" ".local/bin/vim_askpass_helper" ".local/bin/vim_askpass_helper_python"

    __install_from_sandbox
    nvim +Lazy
}

cmd_ssh() {
    cat "$SUB/.ssh/config" >> "$HOME/.ssh/config"
}

cmd_git() {
    _link_files_in_sandbox ".gitconfig" ".githooks" ".gitignore"
    __install_from_sandbox
}

cmd_ranger() {
    echo "sudo pacman -S highlight ttf-joypixels noto-fonts-emoji ueberzug poppler"

    _link_files_in_sandbox ".config/ranger"

    mkdir -p "$SANDBOX_PATH/.config/ranger/plugins"
    git clone https://github.com/alexanderjeurissen/ranger_devicons "$SANDBOX_PATH/.config/ranger/plugins/ranger_devicons"
    __install_from_sandbox
    ranger --copy-config=all
}

cmd_gpg() {
    _die_if_installed "$HOME/.gnupg"

    cat "$SUB/.gnupg/gpg.conf" >> "$HOME/.gnupg/gpg.conf"
    echo -e "default-cache-ttl 1\nmax-cache-ttl 1" > "$HOME/.gnupg/gpg-agent.conf"; echo RELOADAGENT | gpg-connect-agent
}

cmd_i3() {
    echo "sudo pacman -S nitrogen picom compton ttf-font-awesome xdotool xclip maim"
    _link_files_in_sandbox ".config/i3" ".config/i3status" ".local/bin/i3status_wrapper"
    __install_from_sandbox
}

cmd_bat() {
    _link_files_in_sandbox ".config/bat"
    __install_from_sandbox
}

cmd_ipython() {
    local sub=".ipython"

    _die_if_installed "$HOME/$sub"

    mkdir -p "$HOME/$sub/profile_default"
    ln -s "$SUB/$sub/profile_default/ipython_config.py" "$HOME/$sub/profile_default/ipython_config.py"
}

cmd_font() {
    local sub="$HOME/.local/share/fonts"

    mkdir -p "$sub"
    cd "$sub"
    wget 'https://github.com/ryanoasis/nerd-fonts/releases/download/v2.1.0/FiraCode.zip'
    unzip FiraCode.zip -d "$sub"
    git clone 'https://github.com/powerline/fonts.git' --depth=1
    cd fonts
    ./install.sh
}

cmd_termux() {
    echo "apt install termux-api tsu"
}

cmd_arch() {
    echo 'echo "ParallelDownloads = 5" >> /etc/pacman.conf'
}

cmd_psql() {
    _link_files_in_sandbox ".psqlrc"
    __install_from_sandbox
}

cmd_unlink() {
    #####################################################
    return 0
}

cmd_no_target() {
    _die "TARGET not exists" 1
}

cmd_install() {
    for target in "$@"; do
        case "$target" in
            bash) shift;       cmd_bash       "$@" ;;
            zsh) shift;        cmd_zsh        "$@" ;;
            tmux) shift;       cmd_tmux       "$@" ;;
            alacritty) shift;  cmd_alacritty  "$@" ;;
            nvim) shift;       cmd_nvim       "$@" ;;
            ssh) shift;        cmd_ssh        "$@" ;;
            git) shift;        cmd_git        "$@" ;;
            ranger) shift;     cmd_ranger     "$@" ;;
            gpg) shift;        cmd_gpg        "$@" ;;
            i3) shift;         cmd_i3         "$@" ;;
            bat) shift;        cmd_bat        "$@" ;;
            font) shift;       cmd_font       "$@" ;;
            termux) shift;     cmd_termux     "$@" ;;
            arch) shift;       cmd_arch       "$@" ;;
            psql) shift;       cmd_psql       "$@" ;;
            *) shift;          cmd_no_target  "$@" ;;
        esac
    done
}

cmd_help() {
    echo "Dotfiles installation script:
Usage: ./install.sh install TARGET...
Usage: ./install.sh unlink TARGET"
}


case "$1" in
    install) shift;  cmd_install  "$@" ;;
    unlink) shift;   cmd_unlink   "$@" ;;
    help) shift;     cmd_help     "$@" ;;
    *) shift;        cmd_help   "$@" ;;
esac
exit 0