#!/bin/sh
# nosignal-update-check — gather update status into a small JSON cache that the
# settings app's Updates page (and anything else) can read instantly.
# Writes: ~/.local/state/nosignal/update-status.json
# Run by nosignal-update-check.timer (and on demand from the Updates page).
set -u

STATE_DIR="${XDG_STATE_HOME:-$HOME/.local/state}/nosignal"
OUT="$STATE_DIR/update-status.json"
NOSIGNAL_REPO="$HOME/.local/share/nosignal"
mkdir -p "$STATE_DIR"

# Official repo updates (checkupdates is safe: uses a temp db copy, no root).
repo=0
if command -v checkupdates >/dev/null 2>&1; then
  repo=$(checkupdates 2>/dev/null | grep -c . || true)
fi

# AUR updates.
aur=0
for h in yay paru; do
  if command -v "$h" >/dev/null 2>&1; then
    aur=$("$h" -Qua 2>/dev/null | grep -c . || true)
    break
  fi
done

# Flatpak updates (may touch the network; keep it bounded).
flatpak=0
if command -v flatpak >/dev/null 2>&1; then
  flatpak=$(timeout 20 flatpak remote-ls --updates 2>/dev/null | grep -c . || true)
fi

# NoSignal layer: migrations present in the on-system repo but not yet applied.
migrations=0
applied="$STATE_DIR/applied"
if [ -d "$NOSIGNAL_REPO/nosignal-update/migrations" ]; then
  for m in "$NOSIGNAL_REPO/nosignal-update/migrations"/*.sh; do
    [ -e "$m" ] || continue
    base=$(basename "$m")
    [ -f "$applied" ] && grep -qxF "$base" "$applied" && continue
    migrations=$((migrations + 1))
  done
fi

# Last full system upgrade, from pacman's log.
last_upgrade=""
if [ -r /var/log/pacman.log ]; then
  last_upgrade=$(grep -F 'starting full system upgrade' /var/log/pacman.log \
    | tail -1 | sed 's/^\[\([^]]*\)\].*/\1/')
fi

checked=$(date -Is)

cat > "$OUT" <<EOF
{
  "checked": "$checked",
  "repo": $repo,
  "aur": $aur,
  "flatpak": $flatpak,
  "migrations_pending": $migrations,
  "last_upgrade": "$last_upgrade"
}
EOF

cat "$OUT"