# 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 $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "minimax/hailuo/2.3/standard/text-to-video",
  "prompt": "An intense electrical storm rages over a modern city skyline at night. Multiple lightning bolts strike simultaneously, illuminating the towering skyscrapers in brilliant white flashes. Thunder clouds roil and churn overhead while constant lightning creates a strobe effect. Rain pours in heavy sheets, visible in the glow of city lights. The camera captures the drama from across a river as lightning reflects in the water. Lightning branches across the sky in intricate patterns. Atmosphere: dramatic, powerful, electrifying urban storm.",
  "duration": 6,
  "prompt_optimizer": true
}
SANDBASE_JSON
)
run_id=$(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"