# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
  -X POST "https://api.sandbase.ai/v1/run" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "minimax/hailuo/2.3/standard/image-to-video",
  "image": "https://static.sandbase.ai/examples/minimax/hailuo/2.3/standard/image-to-video/input_image_0.jpg",
  "prompt": "The space station slowly rotates in orbit, its solar panels tracking the sun. Earth rotates majestically in the background with weather patterns and landmasses drifting by. The station's communication arrays adjust position. A small spacecraft approaches one of the docking ports. The scene captures the silent majesty of space and human engineering.",
  "duration": 6,
  "prompt_optimizer": true
}
SANDBASE_JSON
)
run_id=$(printf '%s' "$result" | jq -r .id)
for attempt in $(seq 1 120); do
  status=$(printf '%s' "$result" | jq -r .status)
  case "$status" in completed|failed|timeout) break ;; esac
  sleep 2
  result=$(curl --fail-with-body --silent \
    -H "Authorization: Bearer $SANDBASE_API_KEY" \
    "https://api.sandbase.ai/v1/run/$run_id")
done
status=$(printf '%s' "$result" | jq -r .status)
[ "$status" = completed ] || { echo "Generation ended: $status" >&2; exit 1; }
printf '%s\n' "$result"