#!/bin/bash
#
# Test the RPC configuration that Mempool uses (host.docker.internal:38332
# = host's 127.0.0.1:38332 when Mempool runs in Docker on that host).
# Run on the machine where Mempool runs to verify the node has ~11535 blocks;
# then align Dashboard, Anchorage and Faucet to the same host:port.
#
# Usage: ./test-mempool-rpc-config.sh [RPC_HOST] [RPC_PORT]
#   Default: 127.0.0.1 38332
# Example (node on another machine): ./test-mempool-rpc-config.sh 192.168.1.105 38332
#
# Author: 4NK Team
# Date: 2026-02-02

set -e

RPC_HOST="${1:-127.0.0.1}"
RPC_PORT="${2:-38332}"
RPC_USER="${BITCOIN_RPC_USER:-bitcoin}"
RPC_PASS="${BITCOIN_RPC_PASSWORD:-bitcoin}"
EXPECTED_MIN="${EXPECTED_HEIGHT_MIN:-11000}"
EXPECTED_MAX="${EXPECTED_HEIGHT_MAX:-12000}"

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
TMP_JSON="$SCRIPT_DIR/.test-mempool-rpc-$$.json"
trap 'rm -f "$TMP_JSON"' EXIT

echo "=== Test Mempool RPC config (same node as Mempool uses) ==="
echo "Host: $RPC_HOST  Port: $RPC_PORT"
echo ""

# JSON-RPC getblockchaininfo
HTTP_CODE=$(curl -s -o "$TMP_JSON" -w "%{http_code}" \
    --user "$RPC_USER:$RPC_PASS" \
    --data-binary '{"jsonrpc":"1.0","id":"test","method":"getblockchaininfo","params":[]}' \
    -H "content-type: text/plain;" \
    "http://${RPC_HOST}:${RPC_PORT}/" 2>/dev/null || echo "000")

if [ "$HTTP_CODE" != "200" ]; then
    echo "FAIL: RPC returned HTTP $HTTP_CODE (node unreachable or auth failed)."
    exit 1
fi

if [ ! -f "$TMP_JSON" ] || ! grep -q '"result"' "$TMP_JSON" 2>/dev/null; then
    echo "FAIL: RPC response missing result."
    exit 1
fi

CHAIN=$(grep -o '"chain"[[:space:]]*:[[:space:]]*"[^"]*"' "$TMP_JSON" | sed 's/.*:[[:space:]]*"\([^"]*\)".*/\1/')
BLOCKS=$(grep -o '"blocks"[[:space:]]*:[[:space:]]*[0-9]*' "$TMP_JSON" | head -1 | grep -o '[0-9]*$')

if [ -z "$BLOCKS" ]; then
    echo "FAIL: Could not parse 'blocks' from getblockchaininfo."
    exit 1
fi

echo "Node:  chain=$CHAIN  blocks=$BLOCKS"

if [ "$CHAIN" != "signet" ]; then
    echo "WARN: chain is not 'signet' (got '$CHAIN')."
fi

if [ "$BLOCKS" -ge "$EXPECTED_MIN" ] && [ "$BLOCKS" -le "$EXPECTED_MAX" ]; then
    echo "OK: Height $BLOCKS is in expected range [$EXPECTED_MIN..$EXPECTED_MAX] (same as Mempool)."
    echo ""
    echo "Align Dashboard, Anchorage and Faucet to this node: BITCOIN_RPC_HOST=$RPC_HOST BITCOIN_RPC_PORT=$RPC_PORT"
    exit 0
else
    echo "WARN: Height $BLOCKS is outside expected range [$EXPECTED_MIN..$EXPECTED_MAX]."
    echo "      This may not be the node Mempool uses, or the chain is not synced."
    exit 1
fi