#!/usr/bin/env bash

# Text formatting variables
text_bold="\e[1m"
text_red="\e[31m"
text_reset="\e[0m"
text_yellow="\e[33m"

# Output functions
function log {
    echo -ne "$1\n"
}

function warning {
    echo -ne "${text_bold}${text_yellow}WARNING${text_reset} $1\n"
}

function error {
    echo -ne "${text_bold}${text_red}ERROR${text_reset} $1\n"
}

# Get current dotfile directory for later linking
dotfiles="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"

# Check if dotfiles for machine exist
if [ ! -d "$dotfiles/machines/$HOSTNAME" ]; then
    error "No dotfiles for machine $text_bold$HOSTNAME$text_reset found"
    exit 1
fi

# Get dotfiles for current machine
cd "$dotfiles/machines/$HOSTNAME"
files=( $(find -L -type f -printf '%P\n'))

log "Linking $text_bold${#files[@]}$text_reset files..\n"

# Link files
for file in "${files[@]}"; do
    
    # Check if target is a link
    if [ -L "$HOME/$file" ]; then

        if [ "$(readlink $HOME/$file)" != "$dotfiles/machines/$HOSTNAME/$file" ]; then
            warning "$text_bold$HOME/$file$text_reset is a link but doesn't point to this repository, it will not be linked"
            continue
        fi

    # Check if target is a file or directory
    elif [ -f "$HOME/$file" ]; then

        warning "$text_bold$HOME/$file$text_reset exists and will not be linked"
        continue

    # Create link
    else

        # Create target directory if not existent
        mkdir -p "$(dirname $HOME/$file)"

        # Link file
        ln -s "$dotfiles/machines/$HOSTNAME/$file" "$HOME/$file"
        log "Linked $text_bold$dotfiles/$file$text_reset to $text_bold$HOME/$file$text_reset"

    fi

done

log "\ndone"