#!/bin/bash

# omarchy:summary=Check whether system or AUR packages have available updates.

set -euo pipefail

CHECK_TIMEOUT="${OMARCHY_UPDATE_CHECK_TIMEOUT:-60}"
STATE_DIR="${XDG_STATE_HOME:-$HOME/.local/state}/omarchy/updates"
TMP_PARENT="${TMPDIR:-/tmp}"

mkdir -p "$STATE_DIR"

tmp_dir=$(mktemp -d "$TMP_PARENT/omarchy-update-available.XXXXXX")
trap 'rm -rf "$tmp_dir"' EXIT

packages_raw="$tmp_dir/packages.raw"
packages_tmp="$tmp_dir/packages"
aur_raw="$tmp_dir/aur.raw"
aur_tmp="$tmp_dir/aur"
errors_tmp="$tmp_dir/errors"

packages_file="$STATE_DIR/packages"
aur_file="$STATE_DIR/aur"
available_file="$STATE_DIR/available"
checked_at_file="$STATE_DIR/checked-at"
error_file="$STATE_DIR/error"

: >"$packages_raw"
: >"$packages_tmp"
: >"$aur_raw"
: >"$aur_tmp"
: >"$errors_tmp"

strip_update_output() {
  local source="$1"
  local destination="$2"

  sed -E 's/\x1B\[[0-9;]*m//g' "$source" | sed '/^[[:space:]]*$/d' >"$destination"
}

check_system_packages() {
  local status=0

  if command -v checkupdates >/dev/null 2>&1 && command -v fakeroot >/dev/null 2>&1; then
    CHECKUPDATES_DB="$tmp_dir/checkupdates-db" timeout "$CHECK_TIMEOUT" checkupdates --nocolor >"$packages_raw" 2>"$tmp_dir/checkupdates.err" || status=$?

    case "$status" in
      0|2)
        ;;
      124)
        echo "System package update check timed out" >>"$errors_tmp"
        ;;
      *)
        echo "System package update check failed" >>"$errors_tmp"
        sed '/^[[:space:]]*$/d' "$tmp_dir/checkupdates.err" >>"$errors_tmp" || true
        ;;
    esac
  elif command -v pacman >/dev/null 2>&1; then
    # Fallback for systems that have not picked up pacman-contrib/fakeroot yet.
    # This only reports updates already known to the local sync database.
    pacman -Qu --color never >"$packages_raw" 2>/dev/null || true
  else
    echo "pacman is not available" >>"$errors_tmp"
  fi

  strip_update_output "$packages_raw" "$packages_tmp"
}

check_aur_packages() {
  local status=0

  command -v pacman >/dev/null 2>&1 || return 0
  command -v yay >/dev/null 2>&1 || return 0
  pacman -Qem >/dev/null 2>&1 || return 0

  timeout "$CHECK_TIMEOUT" yay --color never -Qua >"$aur_raw" 2>"$tmp_dir/yay.err" || status=$?

  case "$status" in
    0|1)
      ;;
    124)
      echo "AUR package update check timed out" >>"$errors_tmp"
      ;;
    *)
      echo "AUR package update check failed" >>"$errors_tmp"
      sed '/^[[:space:]]*$/d' "$tmp_dir/yay.err" >>"$errors_tmp" || true
      ;;
  esac

  strip_update_output "$aur_raw" "$aur_tmp"
  grep -vw '\[ignored\]$' "$aur_tmp" >"$aur_tmp.filtered" || true
  mv "$aur_tmp.filtered" "$aur_tmp"
}

check_system_packages
check_aur_packages

cp "$packages_tmp" "$packages_file"
cp "$aur_tmp" "$aur_file"
cat "$packages_tmp" "$aur_tmp" >"$available_file"
date --iso-8601=seconds >"$checked_at_file"

if [[ -s $errors_tmp ]]; then
  cp "$errors_tmp" "$error_file"
else
  rm -f "$error_file"
fi

if [[ -s $available_file ]]; then
  cat "$available_file"
  exit 0
fi

if [[ -s $error_file ]]; then
  cat "$error_file" >&2
fi

echo "System is up to date"
exit 1