#!/usr/bin/env bash

set -euo pipefail

PROJECT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
LANGGRAPH_CONFIG="${PROJECT_DIR}/EvoScientist/langgraph_dev/langgraph.json"
HOST="${EVOSCIENTIST_LANGGRAPH_HOST:-127.0.0.1}"
PORT="${EVOSCIENTIST_LANGGRAPH_DEV_PORT:-3076}"
WEB_ENV="${PROJECT_DIR}/../Ai4Sci-Web/.env"
N_JOBS="${EVOSCIENTIST_LANGGRAPH_JOBS_PER_WORKER:-6}"

if [[ ! -x "${PROJECT_DIR}/.venv/bin/langgraph" ]]; then
    echo "LangGraph executable not found: ${PROJECT_DIR}/.venv/bin/langgraph" >&2
    echo "Run 'uv sync' in ${PROJECT_DIR} first." >&2
    exit 1
fi

cd "${PROJECT_DIR}"

# Ask before stopping the process listening on PORT. Matching every connection
# would also terminate Gateway while it is connected to this Runtime.
PIDS="$(lsof -tiTCP:"${PORT}" -sTCP:LISTEN 2>/dev/null || true)"
if [[ -n "${PIDS}" ]]; then
    echo "Port ${PORT} is already in use by PID(s): ${PIDS}" >&2
    ANSWER=""
    read -r -p "Kill the process(es) using port ${PORT}? [y/N] " ANSWER || true
    case "${ANSWER}" in
        [yY]|[yY][eE][sS])
            echo "Killing process(es) on port ${PORT}: ${PIDS}"
            kill ${PIDS}
            sleep 1
            ;;
        *)
            echo "LangGraph not started; process(es) on port ${PORT} were left running." >&2
            exit 1
            ;;
    esac
fi

# The Web Gateway always supplies a verified conversation workspace scope.
export EVOSCIENTIST_DEPLOY_MODE="${EVOSCIENTIST_DEPLOY_MODE:-full}"
export EVOSCIENTIST_WORKSPACE_DIR="${EVOSCIENTIST_WORKSPACE_DIR:-${PROJECT_DIR}/../.ai4sci/workspace}"

exec uv run --env-file "${WEB_ENV}" langgraph dev \
    --config "${LANGGRAPH_CONFIG}" \
    --host "${HOST}" \
    --port "${PORT}" \
    --no-browser \
    --no-reload \
    --allow-blocking \
    --n-jobs-per-worker "${N_JOBS}"