#!/usr/bin/env bash
# backup.sh — CONTRACT_004 backup producer (operator orchestrator).
#
#   ./backup/backup.sh [UTC-timestamp]
#
# The timestamp is supplied by the caller (CI/cron) per CONTRACT_004 §4.1; it
# defaults to now for manual runs. The operator contributes the Pulumi state
# (local file backend) and the secrets (from passphrase-encrypted config); the
# heavy lifting runs on the VM via backup-remote.sh. Result: a bundle in RustFS
# foundation-backups/<TS>/ replicated to the offsite bucket.
set -euo pipefail
ROOT="$(cd "$(dirname "$0")/.." && pwd)"
DIR="$ROOT/bootstrap"
TS="${1:-$(date -u +%Y%m%dT%H%M%SZ)}"
export PULUMI_BACKEND_URL="file://${DIR}/state"
export PULUMI_CONFIG_PASSPHRASE="$(pass olsitec-foundation/PULUMI_CONFIG_PASSPHRASE)"
KEY="${SSH_PRIVATE_KEY_PATH:-${HOME}/.ssh/foundation-test_ed25519}"
MC_IMAGE="$(grep '^IMAGE_MC=' "$ROOT/VERSIONS" | cut -d= -f2-)"
cd "$DIR"
pulumi stack select foundation >/dev/null

RT=$(pulumi config get vaultCredentials:rootToken)
OFF_EP=$(pulumi config get foundation:backup.offsiteEndpoint)
OFF_AK=$(pulumi config get foundation:backup.offsiteAccessKey)
OFF_SK=$(pulumi config get foundation:backup.offsiteSecretKey)
BUCKET=$(pulumi config get foundation:backup.bucket)
AGE_RECIPIENT=$(pulumi config get foundation:backup.ageRecipient)  # public; CONTRACT_004 §4.3
HOST=$(pulumi config get foundation:vm.host)
PORT=$(pulumi config get foundation:vm.sshPort)
SUSER=$(pulumi config get foundation:vm.user)
SSHX="ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ConnectTimeout=15 -i $KEY -p $PORT $SUSER@$HOST"
W="/tmp/foundation-backup-$TS"

echo "backup: $TS -> rfs/$BUCKET/$TS (+ offsite)"
# Pulumi state + the assembler script onto the VM.
pulumi stack export | $SSHX "mkdir -p $W && cat > $W/pulumi-state.json"
$SSHX "cat > /tmp/backup-remote-$TS.sh" < "$ROOT/backup/backup-remote.sh"
# Run the assembler: secrets on stdin (never argv); TS, MC_IMAGE, age recipient as args.
printf '%s\n%s\n%s\n%s\n%s\n' "$RT" "$OFF_EP" "$OFF_AK" "$OFF_SK" "$BUCKET" \
  | $SSHX "sh /tmp/backup-remote-$TS.sh '$TS' '$MC_IMAGE' '$AGE_RECIPIENT'; rm -f /tmp/backup-remote-$TS.sh"
echo "backup: done ($TS)"