#!/usr/bin/env bash
set -euo pipefail

DOTFILES="${DOTFILES:-$HOME/.dotfiles}"

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

    if [[ ! -e "$src" ]]; then
        echo "missing source: $src"
        return 1
    fi

    if [[ -L "$dst" && "$(readlink "$dst")" == "$src" ]]; then
        echo "ok: $dst -> $src"
        return 0
    fi

    if [[ -e "$dst" || -L "$dst" ]]; then
        printf "replace %s? [y/N] " "$dst"
        read -r answer

        case "$answer" in
            y|Y|yes|YES)
                mv "$dst" "$dst.bak.$(date +%Y%m%d%H%M%S)"
                ;;
            *)
                echo "skip: $dst"
                return 0
                ;;
        esac
    fi

    mkdir -p "$(dirname "$dst")"
    ln -s "$src" "$dst"
    echo "linked: $dst -> $src"
}

link_file "$DOTFILES/bash/bashrc" "$HOME/.bashrc"
link_file "$DOTFILES/git/gitconfig" "$HOME/.gitconfig"