# 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 $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "bfl/flux-2/flash",
  "prompt": "An army of ants battles for a sugar cube in a giant sandbox, with tiny plastic soldier toys caught in the melee. Ant bodies shine against gritty beige sand and the glossy, crystalline cube. Fiery sunrise spills golden highlights, throwing dramatic shadows, amplifying the excitement. Shot macro (100mm), aperture f/2.8 for soft background, centered composition with ground-level POV, mixing organic and manufactured textures.",
  "aspect_ratio": "16:9",
  "output_format": "png",
  "guidance_scale": 2.5
}
SANDBASE_JSON
)
run_id=$(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"