// mbproxy configuration (Linux / systemd). Copy to /etc/mbproxy/appsettings.json and
// edit before starting the service. install.sh seeds this file only when none exists —
// an existing appsettings.json is always preserved across reinstalls.
//
// JSONC: // and /* */ comments are accepted. The file is hot-reloaded on save.
// This is the Linux counterpart of mbproxy.config.template.json — identical keys, with
// a /var/log/mbproxy log path; shipped as appsettings.json by a `dotnet publish -r linux-*`.
//
// FULL REFERENCE — every key, type, default, range, validation rule and hot-reload
// behaviour — lives in docs/Operations/Configuration.md. The notes below are brief
// pointers only; consult that document before editing.
{
  "Mbproxy": {

    // Fleet-wide BCD tag list — applies to every PLC. Each entry: Address (Modbus
    // PDU-decimal), Width (16 or 32), optional Name (debug-view label) and CacheTtlMs.
    // Per-PLC Add/Remove overrides go under Plcs[].BcdTags. Trailing comments give the
    // 4xxxx Modbus address and the DirectLOGIC V-memory reference.
    "BcdTags": {
      "Global": [
        // 16-bit setpoints
        { "Address": 1536, "Width": 16, "Name": "Left ArgonSP" },      // 41537
        { "Address": 1539, "Width": 16, "Name": "Right ArgonSP" },     // 41540
        { "Address": 1544, "Width": 16, "Name": "Left ChlorineSP" },   // 41545 · V3010
        { "Address": 1545, "Width": 16, "Name": "Right ChlorineSP" },  // 41546 · V3011
        { "Address": 1546, "Width": 16, "Name": "Left HydrogenSP" },   // 41547 · V3012
        { "Address": 1547, "Width": 16, "Name": "Right HydrogenSP" },  // 41548 · V3013
        { "Address": 1548, "Width": 16, "Name": "Left AirSP" },        // 41549 · V3014
        { "Address": 1549, "Width": 16, "Name": "Right AirSP" },       // 41550 · V3015

        // 32-bit runtimes — CDAB pair spanning Address and Address+1
        { "Address": 4616, "Width": 32, "Name": "MTA Runtime Left (min)" },   // 44617/44618 · V11010
        { "Address": 4618, "Width": 32, "Name": "MTA Runtime Right (min)" },  // 44619/44620 · V11012
        { "Address": 4626, "Width": 32, "Name": "FRR Runtime Left (min)" },   // 44627/44628 · V11022
        { "Address": 4628, "Width": 32, "Name": "FRR Runtime Right (min)" }   // 44629/44630 · V11024
      ]
    },

    // One entry per PLC: upstream clients connect to ListenPort, the proxy forwards to
    // Host:Port. ListenPort must be unique. Optional per-PLC "BcdTags": { "Add", "Remove" }.
    "Plcs": [
      {
        "Name": "Z28061",
        "ListenPort": 5020,
        "Host": "10.210.192.5",
        "Port": 502
      }
    ],

    // Read-only HTTP status page / dashboard. Set to 0 to disable the admin endpoint.
    "AdminPort": 8080,

    // Backend connect / request / graceful-shutdown timeouts (ms), plus TCP keepalive
    // and the idle-backend FC03 heartbeat. BackendHeartbeatIdleMs must exceed
    // BackendRequestTimeoutMs. See docs/Architecture/Keepalive.md.
    "Connection": {
      "BackendConnectTimeoutMs": 3000,
      "BackendRequestTimeoutMs": 3000,
      "GracefulShutdownTimeoutMs": 10000,
      "Keepalive": {
        "Enabled": true,
        "TcpIdleTimeMs": 30000,
        "TcpProbeIntervalMs": 5000,
        "TcpProbeCount": 4,
        "BackendHeartbeatIdleMs": 30000,
        "BackendHeartbeatProbeAddress": 0
      }
    },

    // Polly policies: backend-connect retry, listener-bind recovery, read coalescing.
    // BackendConnect / ListenerRecovery are restart-only (not hot-reloaded).
    "Resilience": {
      "BackendConnect": { "MaxAttempts": 3, "BackoffMs": [ 100, 500, 2000 ] },
      "ListenerRecovery": { "InitialBackoffMs": [ 1000, 2000, 5000, 15000, 30000 ], "SteadyStateMs": 30000 },
      "ReadCoalescing": { "Enabled": true, "MaxParties": 32 }
    },

    // Opt-in response cache — OFF by default per tag. A tag opts in via its CacheTtlMs
    // (or a PLC's DefaultCacheTtlMs); these are service-wide safety knobs only.
    // See docs/Architecture/ResponseCache.md.
    "Cache": {
      "AllowLongTtl": false,
      "MaxEntriesPerPlc": 1000,
      "EvictionIntervalMs": 5000
    }
  },

  // Structured logging — console (captured by systemd-journald) + daily rolling file
  // under /var/log/mbproxy. Error+ events also go to local syslog under systemd (wired
  // in code, not here). See docs/Operations/Troubleshooting.md.
  "Serilog": {
    "Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.File" ],
    "MinimumLevel": {
      "Default": "Information",
      "Override": {
        "Microsoft": "Warning",
        "System": "Warning"
      }
    },
    "WriteTo": [
      {
        "Name": "Console",
        "Args": {
          "outputTemplate": "[{Timestamp:HH:mm:ss} {Level:u3}] {Message:lj} {Properties:j}{NewLine}{Exception}"
        }
      },
      {
        "Name": "File",
        "Args": {
          "path": "/var/log/mbproxy/mbproxy-.log",
          "rollingInterval": "Day",
          "retainedFileCountLimit": 30,
          "outputTemplate": "[{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} {Level:u3}] {Message:lj} {Properties:j}{NewLine}{Exception}"
        }
      }
    ]
  }
}