# 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 $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "kwaivgi/kling-video/3.0/omni/pro/video-to-video/reference",
  "video": "https://static.sandbase.ai/examples/kwaivgi/kling-video/omni/pro/video-to-video/reference/output_url_0.mp4",
  "prompt": "Based on @Video1, generate the next shot. keep the style of the video",
  "duration": 5,
  "elements": [
    {
      "frontal_image_url": "https://static.sandbase.ai/examples/kwaivgi/kling-video/omni/pro/reference-to-video/input_element_0.png",
      "reference_image_urls": [
        "https://static.sandbase.ai/examples/kwaivgi/kling-video/omni/pro/reference-to-video/input_element_1.png",
        "https://static.sandbase.ai/examples/kwaivgi/kling-video/omni/pro/reference-to-video/input_element_2.png"
      ]
    }
  ],
  "keep_audio": false,
  "aspect_ratio": "16:9"
}
SANDBASE_JSON
)
run_id=$(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"