function get_os() {
    un=$(uname)

    if [[ "$un" = "Linux" ]]; then
        echo -n "linux"
        return 0
    fi

    if [[ "$un" = "Darwin" ]]; then
        echo -n "osx"
        return 0
    fi
}

## OPERATING_SYSTEM=$(get_os)

# For a given file, return its corresponding project root.
function project_root() {
    set +u
    if [[ ! -z "${PROJECT_ROOT}" ]]; then
        echo "$PROJECT_ROOT"
        return 0
    fi
    set -u

    pushd "$(dirname "$1")" >/dev/null 2>&1 || exit 101
    out=$(git rev-parse --show-toplevel)

    ret="$?"
    popd >/dev/null 2>&1 || exit 1

    if [[ "$ret" != "0" ]]; then
        echo -n ""
        return 1
    fi

    echo -n "$out"
    return 0
}

# When run from a dir with would-format configured, return
# would-format's own directory
wf_root() {
    set +u
    if [[ ! -z "${WF_ROOT}" ]]; then
        echo "$WF_ROOT"
        return 0
    fi
    set -u

    arg=$(pwd)/bin/would-reformat.sh
    PROJECT_ROOT=$(project_root "$arg")

    pushd "$PROJECT_ROOT" 2>&1 >/dev/null

    pr="$PROJECT_ROOT"

    link="$pr/bin/would-reformat.sh"

    original0=$(resolve_symlink "$link")
    original=$(normalize_dir_of_file "$original0")

    out="$original"

    popd 2>&1 >/dev/null

    echo "$out"
    return 0
}

# FIXME: Make this bail if it fails
function normalize_dir_of_file() {
    out0=$(readlink -m "$1")

    out=$(dirname "$out0")

    echo -n "$out"
    return 0
}

function resolve_symlink() {
    if [[ "$OPERATING_SYSTEM" = "osx" ]]; then
        out=$(readlink "$1")
    else
        out=$(readlink -f "$1")
    fi

    echo "$out"
}

function custom_sniff() {
    file="$1"

    pr=$(project_root "$file")

    if [[ -f "$pr/.would-reformat/custom-sniffer" ]]; then
        custom=$("$pr/.would-reformat/custom-sniffer" "$1")
        ret="$?"

        echo "$custom"

        return 0
    fi
}

function custom_formatter() {
    root="$1"
    file_type="$2"

    maybe="$root/.would-reformat/$file_type"
    if [[ -f "$maybe" ]]; then
        echo "$maybe"
        return
    fi

    echo "use-default"
}

## WOULD_FORMAT_PROJECT_ROOT=$(project_root $1)

# FIXME: This needs to be made customizable
function sniff_file_type() {
    ff=$1

    maybe_custom=$(custom_sniff "$ff")
    if [[ "$maybe_custom" != "" ]]; then
        echo "$maybe_custom"
        return 0
    fi

    file_type=

    if [[ $ff == *.py ]]; then
        file_type="python"
    elif [[ $ff == *.js ]]; then
        file_type="javascript"
    elif [[ $ff == *.ts ]]; then
        file_type="typescript"
    elif [[ $ff == *.vue ]]; then
        file_type="vue"
    elif [[ $ff == *.css ]]; then
        file_type="css"
    elif [[ $ff == *.php ]]; then
        file_type="php"
    elif [[ $ff == *.html ]]; then
        file_type="html"
    elif [[ $ff == *.jsx ]]; then
        file_type="jsx"
    elif [[ $ff == *.tsx ]]; then
        file_type="tsx"
    elif [[ $ff == *.css ]]; then
        file_type="css"
    elif [[ $ff == *.scss ]]; then
        file_type="scss"
    elif [[ $ff = *.sh ]]; then
        file_type="sh"
    elif [[ $ff = *.go ]]; then
        file_type="golang"
    elif [[ $ff = *.dart ]]; then
        file_type="dart"
    elif [[ $ff = *.pl ]]; then
        file_type="perl"
    fi

    echo $file_type
}

function wrflog() {
    echo "$@" >>/tmp/wrflog
}

# WOULD_FORMAT_INSTALLATION_ROOT=$(wfroot)

export WOULD_FORMAT_PROJECT_ROOT