#!/bin/bash

# omarchy:summary=Show or switch the region this machine is set up for
# omarchy:args=[global|cn]
# omarchy:examples=omarchy region | omarchy region cn
# omarchy:requires-sudo=true

set -euo pipefail

region_file=/etc/omarchy/region

if (($# == 0)); then
  if [[ ! -e $region_file ]]; then
    echo "Global"
  elif [[ $(<"$region_file") == "cn" ]]; then
    echo "China"
  else
    echo "Unknown region in $region_file: $(<"$region_file")" >&2
    exit 1
  fi
  exit 0
fi

if [[ $1 != "global" && $1 != "cn" ]]; then
  echo "Usage: omarchy-region [global|cn]" >&2
  exit 1
fi

channel=$(omarchy-version-channel)
if [[ $channel != "stable" && $channel != "rc" && $channel != "edge" ]]; then
  echo "Cannot tell this machine's package channel ($channel); run omarchy channel set first" >&2
  exit 1
fi

if [[ $1 == "cn" ]]; then
  # Upgrade first: the keyring install below syncs new databases.
  omarchy-update-pacman -Syu --noconfirm
  sudo env OMARCHY_REGION=cn OMARCHY_PATH="$OMARCHY_PATH" bash -e "$OMARCHY_PATH/install/config/region.sh"
  # Trust ArchLinuxCN before the refresh upgrades through it.
  rendered=$(mktemp -d)
  trap 'rm -rf "$rendered"' EXIT
  omarchy-apply-pacman --render "$channel" "$rendered"
  mapfile -t profile_packages < <(grep -Ev '^[[:space:]]*(#|$)' "$OMARCHY_PATH/default/regions/cn/packages")
  sudo pacman --config "$rendered/pacman.conf" -Sy --noconfirm --needed "${profile_packages[@]}"
  sudo pacman-key --populate archlinuxcn
  omarchy-refresh-pacman "$channel"
else
  sudo env OMARCHY_REGION=global OMARCHY_PATH="$OMARCHY_PATH" bash -e "$OMARCHY_PATH/install/config/region.sh"
  omarchy-refresh-pacman "$channel"
fi

# The developer mirrors reach only a new session, so offer one.
if [[ -t 0 && -t 1 ]] && gum confirm --affirmative "Log out now" --negative "Later" "Log out now to switch the developer mirrors?"; then
  omarchy-system-logout
else
  echo "Log back in to switch the developer mirrors."
fi