#!/usr/bin/env bash

if ! has nix_direnv_version || ! nix_direnv_version 3.1.0; then
  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/3.1.0/direnvrc" "sha256-yMJ2OVMzrFaDPn7q8nCBZFRYpL/f0RcHzhmw/i6btJM="
fi

export DEVENV_IN_DIRENV_SHELL=true

# Load .env file if present
dotenv_if_exists

watch_file flake.nix
watch_file flake.lock
watch_file .envrc.local
watch_file backend/shell.nix
watch_file frontend/shell.nix

# Check if .envrc.local exists and contains a shell preference
if [[ -f .envrc.local ]]; then
  source .envrc.local
fi

# If no shell is specified, prompt the user interactively
if [[ -z "$NIX_SHELL_NAME" ]]; then
  echo ""
  echo "🔧 Available development shells:"
  echo "  1) frontend - Nuxt.js/Vue development environment"
  echo "  2) backend  - Rust backend development environment"
  echo ""
  echo "💡 Tip: Create a .envrc.local file with 'export NIX_SHELL_NAME=frontend' to skip this prompt"
  echo ""

  # Read user input
  read -p "Select shell (1 or 2): " choice

  case $choice in
    1|frontend)
      NIX_SHELL_NAME=frontend
      ;;
    2|backend)
      NIX_SHELL_NAME=backend
      ;;
    *)
      echo "❌ Invalid choice. Please select 1 or 2."
      return 1
      ;;
  esac

  echo "✅ Loading ${NIX_SHELL_NAME} environment..."
fi

if ! use flake ".#${NIX_SHELL_NAME}" --no-pure-eval; then
  echo "❌ devenv could not be built. The devenv environment was not loaded. Make the necessary changes to flake.nix and hit enter to try again." >&2
fi