#!/bin/bash
# SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
set -e
trap 'echo Cleaning up...; kill 0' EXIT

SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
source "$SCRIPT_DIR/../../../common/launch_utils.sh"

# Set deterministic hash for KV event IDs
export PYTHONHASHSEED=0

# Common configuration
MODEL="Qwen/Qwen3-0.6B"
BLOCK_SIZE=64
VLLM_NIXL_DEVICE_TO_DEVICE=false
VLLM_SKIP_WARMUP=true
PT_HPU_LAZY_MODE=0
NIXL_BUFFER_DEVICE=cpu
VLLM_NIXL_BACKEND=UCX

HTTP_PORT="${DYN_HTTP_PORT:-8000}"

print_launch_banner "Launching Disaggregated + KV Routing on Gaudi (4 HPUs)" "$MODEL" "$HTTP_PORT"


# Start frontend with KV routing
# The frontend will automatically detect prefill workers and activate an internal prefill router
# edit --router-mode to random / round-robin / kv
python -m dynamo.frontend \
    --router-mode kv \
    --http-port "$HTTP_PORT" \
    --router-reset-states &

# two decode workers
# --enforce-eager is added for quick deployment. for production use, need to remove this flag
VLLM_NIXL_SIDE_CHANNEL_PORT=20096 \
HABANA_VISIBLE_DEVICES=0 python3 -m dynamo.vllm \
    --model $MODEL \
    --block-size $BLOCK_SIZE \
    --kv-transfer-config "{\"kv_connector\": \"NixlConnector\", \"kv_role\": \"kv_both\", \"kv_buffer_device\": \"${NIXL_BUFFER_DEVICE}\", \"kv_connector_extra_config\": {\"backends\": [\"${VLLM_NIXL_BACKEND}\"]}}" \
    --disaggregation-mode decode &

VLLM_NIXL_SIDE_CHANNEL_PORT=20097 \
HABANA_VISIBLE_DEVICES=1 python3 -m dynamo.vllm \
    --model $MODEL \
    --block-size $BLOCK_SIZE \
    --kv-transfer-config "{\"kv_connector\": \"NixlConnector\", \"kv_role\": \"kv_both\", \"kv_buffer_device\": \"${NIXL_BUFFER_DEVICE}\", \"kv_connector_extra_config\": {\"backends\": [\"${VLLM_NIXL_BACKEND}\"]}}" \
    --disaggregation-mode decode &

# two prefill workers
# When registered with --disaggregation-mode prefill, these workers are automatically detected
# by the frontend, which activates an internal prefill router for KV-aware prefill routing
VLLM_NIXL_SIDE_CHANNEL_PORT=20098 \
HABANA_VISIBLE_DEVICES=2 python3 -m dynamo.vllm \
    --model $MODEL \
    --block-size $BLOCK_SIZE \
    --kv-transfer-config "{\"kv_connector\": \"NixlConnector\", \"kv_role\": \"kv_both\", \"kv_buffer_device\": \"${NIXL_BUFFER_DEVICE}\", \"kv_connector_extra_config\": {\"backends\": [\"${VLLM_NIXL_BACKEND}\"]}}" \
    --disaggregation-mode prefill \
    --kv-events-config '{"publisher":"zmq","topic":"kv-events","endpoint":"tcp://*:5558", "enable_kv_cache_events":true}'&

VLLM_NIXL_SIDE_CHANNEL_PORT=20099 \
HABANA_VISIBLE_DEVICES=3 python3 -m dynamo.vllm \
    --model $MODEL \
    --block-size $BLOCK_SIZE \
    --kv-transfer-config "{\"kv_connector\": \"NixlConnector\", \"kv_role\": \"kv_both\", \"kv_buffer_device\": \"${NIXL_BUFFER_DEVICE}\", \"kv_connector_extra_config\": {\"backends\": [\"${VLLM_NIXL_BACKEND}\"]}}" \
    --disaggregation-mode prefill \
    --kv-events-config '{"publisher":"zmq","topic":"kv-events","endpoint":"tcp://*:5559", "enable_kv_cache_events":true}' &

# Exit on first worker failure; kill 0 in the EXIT trap tears down the rest
wait_any_exit
