#!/usr/bin/env bash

set -euo pipefail

MINIMAL="${MINIMAL:-0}" # assume minimal=false, i.e. full installation
SYSTEM_WIDE="${SYSTEM_WIDE:-0}" # assume system-wide=false, i.e. user-local installation

INSTALL_DIR="$HOME/.local/bin"
USE_SUDO=""

MAN_DIR="$HOME/.local/share/man"

TMP_DIR=$(mktemp -d)
trap 'rm -rf "$TMP_DIR"' EXIT

SCRIPT_NAME="neovim-manager"
SCRIPT_URL="https://raw.githubusercontent.com/peter-bread/neovim-manager/refs/heads/main/$SCRIPT_NAME"

GITHUB_URL="https://github.com/peter-bread/neovim-manager"

if [[ "$SYSTEM_WIDE" -ne 0 ]]; then
  INSTALL_DIR="/usr/local/bin"
  USE_SUDO="sudo"

  MAN_DIR="/usr/share/man"
fi

if [[ "$MINIMAL" -ne 0 ]]; then
  # install just the script itself

  if command -v wget &>/dev/null; then
    wget -qO "$TMP_DIR/$SCRIPT_NAME" "$SCRIPT_URL"
  elif command -v curl &>/dev/null; then
    curl -fsSL "$SCRIPT_URL" -o "$TMP_DIR/$SCRIPT_NAME"
  else
    echo "Error: Neither wget nor curl is installed" >&2
    exit 1
  fi

  chmod u+x "$TMP_DIR/$SCRIPT_NAME"

  CMD=()
  [[ -n "$USE_SUDO" ]] && CMD+=("$USE_SUDO")
  CMD+=("mv" "$TMP_DIR/$SCRIPT_NAME" "$INSTALL_DIR")

  "${CMD[@]}"

else
  # install the script and manpages

  if ! command -v git &>/dev/null; then
    echo "Error: Full installation requires git."
    exit 1
  fi

  git clone --depth=1 "$GITHUB_URL" "$TMP_DIR/repo"

  CMD=()
  [[ -n "$USE_SUDO" ]] && CMD+=("$USE_SUDO")
  CMD+=("cp" "$TMP_DIR/repo/$SCRIPT_NAME" "$INSTALL_DIR")

  "${CMD[@]}"

  for manpage in "$TMP_DIR/repo/docs/man/"*.[1]; do
    [[ -e "$manpage" ]] || continue
    section="${manpage##*.}"
    dest_dir="$MAN_DIR/man$section"
    mkdir -p "$dest_dir"

    CMD=()
    [[ -n "$USE_SUDO" ]] && CMD+=("$USE_SUDO")
    CMD+=("cp" "$manpage" "$dest_dir/")

    "${CMD[@]}"

  done

fi