#!/bin/sh
#
# To run locally without | sh:
#
#     $ curl -fsS -o myapp_new.sh https://new.phoenixframework.org/myapp
#     $ sh myapp_new.sh
#
# Installs Elixir from Elixir's official isntall.sh script, then runs phx.new.
#
# See latest Elixir install.sh version at:
# https://github.com/elixir-lang/elixir-lang.github.com/blob/main/install.sh

set -eu

echo_heading() {
  echo "\n\033[32m$1\033[0m"
}

main() {
  elixir_version='1.17.3'
  elixir_otp_release='27'
  otp_version='27.1.2'
  root_dir="$HOME/.elixir-install"

  # Install Elixir if needed
  if command -v elixir >/dev/null 2>&1; then
    echo_heading "Elixir is already installed ✓"
  else
    echo_heading "Installing Elixir..."

    if [ ! -d "$root_dir" ]; then
      mkdir -p "$root_dir"
    fi

    curl -fsSo "$root_dir/install.sh" "https://elixir-lang.org/install.sh"

    (
      sh $root_dir/install.sh "elixir@$elixir_version" "otp@$otp_version"
    )
    if [ $? -ne 0 ]; then
      echo "Failed to install elixir"
      exit 1
    fi
    # Export the PATH so the current shell can find 'elixir' and 'mix'
    export PATH=$HOME/.elixir-install/installs/otp/$otp_version/bin:$PATH
    export PATH=$HOME/.elixir-install/installs/elixir/$elixir_version-otp-$elixir_otp_release/bin:$PATH
  fi

  # Use 'mix' to install 'phx_new' archive

  mix_cmd=$(command -v mix)

  if [ -z "$mix_cmd" ]; then
    echo "Error: mix command not found."
    exit 1
  fi

  echo_heading "Installing phx_new archive..."
  mix archive.install hex phx_new --force

  app_name="myapp"

  app_args="$@"

  # Choose db adapter => postgres, mysql, sqlite
  db_option=""

  if command -v psql >/dev/null 2>&1; then
    echo_heading "Postgres is installed. Using Postgres for the Ecto adapter."
    # Do nothing, default is postgres
  elif command -v mysql >/dev/null 2>&1; then
    echo_heading "MySQL is installed. Using MySQL for the Ecto adapter."
    db_option="--database mysql"
  else
    echo_heading "Using SQLite for the Ecto adapter."
    db_option="--database sqlite3"
  fi

  echo_heading "Creating new Phoenix project '$app_name'..."
  mix phx.new "$app_name" $db_option $app_args --install --from-elixir-install

  echo_heading "$app_name created. Starting Phoenix server..."
  cd "$app_name"
  mix setup
  mix phx.server --open
}

main "$@"