#!/bin/sh
# Tests the logic of scripts/backup.sh and scripts/restore.sh without Docker:
# a stub `docker` on PATH logs every call and emulates the compose commands used.
#   sh tests/shell/test_backup_restore.sh
set -eu
ROOT=$(cd "$(dirname "$0")/../.." && pwd)
SP=$(mktemp -d)
trap 'rm -rf "$SP"' EXIT
mkdir -p "$SP/proj/scripts" "$SP/bin" "$SP/state/media/recipes"
cp "$ROOT/scripts/backup.sh" "$ROOT/scripts/restore.sh" "$SP/proj/scripts/"
echo "SECRET_KEY=abc" > "$SP/proj/.env"
echo "foto" > "$SP/state/media/recipes/a.webp"

cat > "$SP/bin/docker" <<STUB
#!/bin/sh
echo "\$*" >> "$SP/state/calls.log"
case "\$*" in
  *"exec -T db sh -c"*pg_dump*) printf 'PGDUMP-CONTENT' ;;
  *"exec -T app tar -C /data -czf - media"*) tar -C "$SP/state" -czf - media ;;
  *"exec -T db sh -c"*pg_isready*) exit 0 ;;
  *"exec -T db sh -c"*pg_restore*) cat > "$SP/state/restored.dump" ;;
  *"run --rm --no-deps -T --entrypoint sh app -c"*) mkdir -p "$SP/state/restored" && tar -C "$SP/state/restored" -xzf - ;;
  *) : ;;
esac
STUB
chmod +x "$SP/bin/docker"
PATH="$SP/bin:$PATH"
cd "$SP/proj"

fail() { echo "FAIL: $*" >&2; exit 1; }

mkdir -p backups
touch -d "2026-01-01" backups/kochbuch-20260101-000000.tar.gz
touch -d "2026-01-02" backups/kochbuch-20260102-000000.tar.gz
KEEP=2 sh scripts/backup.sh > /dev/null

[ "$(ls backups | wc -l)" -eq 2 ] || fail "retention should keep 2 archives"
[ ! -e backups/kochbuch-20260101-000000.tar.gz ] || fail "oldest archive should be deleted"
NEW=$(ls -1t backups/kochbuch-*.tar.gz | head -1)
[ "$(tar -tzf "$NEW" | sort | tr '\n' ' ')" = "db.dump env.backup media.tar.gz " ] || fail "archive content"

rm .env
sh scripts/restore.sh "$NEW" --yes > /dev/null
[ "$(cat "$SP/state/restored.dump")" = "PGDUMP-CONTENT" ] || fail "database not restored"
[ "$(cat "$SP/state/restored/media/recipes/a.webp")" = "foto" ] || fail "photos not restored"
[ "$(cat .env)" = "SECRET_KEY=abc" ] || fail ".env not restored"
grep -q "stop app" "$SP/state/calls.log" || fail "app must be stopped during restore"
[ "$(tail -1 "$SP/state/calls.log")" = "compose up -d app" ] || fail "app must be started last"

echo "OK: backup/restore scripts"