#!/usr/bin/env sh

required_tools=(realpath nvim)
missing=()

for tool in "${required_tools[@]}"; do
    if ! command -v "$tool" &> /dev/null; then
        missing+=("$tool")
    fi
done

if [ "${#missing[@]}" -ne 0 ]; then
    echo "$0: error: missing required tools: ${missing[*]}" >&2
    exit 1
fi

for arg in "$@"; do
    if [ -d "$arg" ]; then
        echo "$0: error: '$arg' is a directory" >&2
        exit 1
    fi
done

if [ ! -z "$NVIM" ]; then
    # inside neovim
    if [ "$#" -ne "0" ]; then
        realpath --zero "$@" | xargs -0 -n1 nvim --server "$NVIM" --remote
    fi
    exit
fi

# outside neovim

if [ "$#" -eq "0" ]; then
    nvim
    exit
fi

nvim "$@"