Happy Horse Reference to Video

# 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 $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "alibaba/happy-horse/reference-to-video",
  "images": [
    "https://help-static-aliyun-doc.aliyuncs.com/assets/img/zh-CN/9000146771/p1067182.webp",
    "https://help-static-aliyun-doc.aliyuncs.com/assets/img/zh-CN/9000146771/p1067183.webp"
  ],
  "prompt": "In the early morning, just as the sun begins to rise, a small pumpkin sits in the pumpkin patch with dewdrops glistening on its surface. Suddenly, with a crisp crack, a fissure appears on the little pumpkin, and golden light shines through the crack. The pumpkin splits open along with the golden glow, releasing a puff of white mist, and a little rabbit appears in the center of the cracked pumpkin.",
  "duration": 5,
  "resolution": "720p",
  "aspect_ratio": "16:9"
}
SANDBASE_JSON
)
run_id=$(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"