# 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 $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "minimax/hailuo/2.3/pro/image-to-video",
  "image": "https://static.sandbase.ai/examples/minimax/hailuo/2.3/pro/image-to-video/input_image_0.jpg",
  "prompt": "The camera follows the mountain biker as they navigate a technical forest trail at high speed, wheels bouncing over roots and rocks. The rider approaches a jump, launching into the air with the bike, both rider and machine perfectly synchronized. They land smoothly and continue through tight turns, splashing through a stream crossing. Mud and water spray as the bike powers through challenging terrain. The atmosphere is wild and adventurous. Audio: Tires gripping dirt, gears shifting, heavy breathing, branches whipping past, and water splashing.",
  "prompt_optimizer": true
}
SANDBASE_JSON
)
run_id=$(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"