# SPDX-License-Identifier: Apache-2.0

# Fallback config file in case fetch for the provided mirror node tag fails.
# grpc, rest, rest-java, web3, graphql and rosetta containers.
# The upstream directive allows the use of the keepalive (good for performance),
# but the hostname must be resolvable when nginx starts.
upstream grpc_host      { server grpc:5600;       keepalive 16; }
upstream rest_host      { server rest:5551;        keepalive 16; }
upstream rest_java_host { server rest-java:8084;   keepalive 16; }
upstream web3_host      { server web3:8545;        keepalive 16; }

server {
  # graphql and rosetta are optional containers, disabled by default, so we cannot leverage the upstream directive.
  set $graphql_host graphql:8083;
  set $rosetta_host rosetta:5700;

  # common configurations
  listen 5551;
  proxy_http_version 1.1;
  proxy_set_header Host $host;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_set_header X-Forwarded-Proto $scheme;
  proxy_set_header "Connection" "";
  resolver 127.0.0.11 valid=600s; # let docker resolve the host names
  http2 on; # enable gRPC

  # web3 host
  location /api/v1/contracts/call { proxy_pass http://web3_host$request_uri; }
  location ~ "^/api/v1/contracts/results/((0x)?[A-Fa-f0-9]{64}|\d+\.\d+\.\d+-\d+-\d+)/opcodes" { proxy_pass http://web3_host$request_uri; }

  # rest-java host
  location ~ "^/api/v1/accounts/(\d+\.){0,2}(\d+|(0x)?[A-Fa-f0-9]{40}|(?:[A-Z2-7]{8})*(?:[A-Z2-7]{2}|[A-Z2-7]{4,5}|[A-Z2-7]{7,8}))/(allowances/nfts|airdrops|hooks)" { proxy_pass http://rest_java_host$request_uri; }
  location ~ "^/api/v1/accounts/(\d+\.){0,2}(\d+|(0x)?[A-Fa-f0-9]{40}|(?:[A-Z2-7]{8})*(?:[A-Z2-7]{2}|[A-Z2-7]{4,5}|[A-Z2-7]{7,8}))/hooks/(0|[1-9]\d*)/storage$" { proxy_pass http://rest_java_host$request_uri; }
  location = /api/v1/network/exchangerate { proxy_pass http://rest_java_host$request_uri; }
  location = /api/v1/network/fees { proxy_pass http://rest_java_host$request_uri; }
  location = /api/v1/network/stake { proxy_pass http://rest_java_host$request_uri; }
  location = /api/v1/network/supply { proxy_pass http://rest_java_host$request_uri; }
  location ~ "^/api/v1/topics/(\d+\.){0,2}\d+$" { proxy_pass http://rest_java_host$request_uri; }

  # rest host
  location /api/v1/ { proxy_pass http://rest_host$request_uri; }

  # grpc host
  # Setting 600s read timeout for topic subscription. When the client receives a message the timeout resets to 0.
  location = /com.hedera.mirror.api.proto.ConsensusService/subscribeTopic { grpc_read_timeout 600s; grpc_pass grpc://grpc_host; }
  location /com.hedera.mirror.api.proto. { grpc_pass grpc://grpc_host; }
  location /grpc.reflection.v1alpha.ServerReflection { grpc_pass grpc://grpc_host; }

  # graphql host
  location = /graphql/alpha { proxy_pass http://$graphql_host$request_uri; }

  # rosetta host
  location /rosetta/ { rewrite ^/rosetta/(.*) /$1 break; proxy_pass http://$rosetta_host; }
}

# REST-Java direct passthrough on port 8084
server {
  listen 8084;
  proxy_http_version 1.1;
  proxy_set_header Host $host;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_set_header X-Forwarded-Proto $scheme;
  proxy_set_header "Connection" "";
  location / { proxy_pass http://rest_java_host$request_uri; }
}