// Compile-time configuration for the Butterfly EDFA Rack bridge.
#pragma once
#include "secrets.h"

// ── MQTT topics ─────────────────────────────────────────────────────
// One HA device, one topic base. Sub-units namespaced under it:
//   <base>/availability            online | offline   (LWT)
//   <base>/diag/<key>              ESP/network diagnostics
//   <base>/seed/<key>              Koheron CTL200       (increment 3)
//   <base>/amp/<key>               Agiltron M511 EYDFA  (increment 4)
//   <base>/set/<...>               command topics       (increment 5)
#define TOPIC_BASE        "lab/laser/" DEVICE_NAME
#define TOPIC_AVAIL       TOPIC_BASE "/availability"
#define DISCOVERY_PREFIX  "homeassistant"

#define AVAIL_ONLINE      "online"
#define AVAIL_OFFLINE     "offline"

#define TOPIC_CMD         TOPIC_BASE "/set"   // subscribe <base>/set/#

// ── Agiltron M511 identity & safety limits ──────────────────────────
// SN Y4022708 / PN EDFA-1C51113331111 -> device ID 0x0000006F (edfa.py).
// Startup reads SN/PN and logs them so the ID is confirmed before control.
#define AGILTRON_DEV_ID   0x00, 0x00, 0x00, 0x6F

// HA number sliders are capped here. The hardware allows 8000 mA pump, but
// the lab notes report ~2500 mA pump-1 -> ~27 dBm (~515 mW). Keep a margin.
#define SEED_CURRENT_MAX_MA   300     // CTL200 ilmax default is 1000; seed DFB is low-power
// Pump-1 current clamp. Two ceilings:
//   SOFT (default) = the 1 W rated operating point (~4000 mA, measured
//     2026-06-17). Guards against accidental over-drive. NOT a safety interlock.
//   HARD = the Agiltron protocol / hardware maximum (8000 mA). Reachable only
//     while the "Pump limit override" switch is ON (set/amp/pump_override), for
//     supervised over-rating characterisation. Driving the 1 W-rated pump diode
//     toward 8000 mA trades diode lifetime (and risks damage) for extra power.
// The HA number slider spans 0..HARD; a command above SOFT is clamped to SOFT
// unless the override is ON. Turning the override OFF re-clamps a running
// setpoint back down to SOFT immediately.
#define PUMP_CURRENT_SOFT_MAX_MA   4000
#define PUMP_CURRENT_HARD_MAX_MA   8000

// Seed thermistor setpoint (CTL200 `rtset`) clamp, in ohms. The CTL200 has no
// native °C setpoint; it regulates the seed TEC to hold the thermistor at this
// resistance. The default operating point is 10 kΩ. The range below spans
// roughly 39…13 °C on the β-model (a guardrail, not a diode-safe interlock —
// narrow it if the DFB1550LP datasheet gives a tighter window).
#define SEED_RT_SETPOINT_MIN_OHM   6000
#define SEED_RT_SETPOINT_MAX_OHM   16000

// NTC β-model for the read-only resistance→°C conversion (display only; the
// CTL200 does its own regulation in ohms). Assumes a 10 kΩ @ 25 °C NTC with
// β = 3435 K. Update if the seed thermistor's R25/β are known to differ.
#define SEED_THERMISTOR_R25_OHM    10000.0f
#define SEED_THERMISTOR_BETA_K     3435.0f
#define SEED_THERMISTOR_T25_K      298.15f

// ── Serial links to the instruments (wired in later increments) ─────
// UART0 stays the USB console. The classic ESP32 has 3 hardware UARTs.
//
//   Koheron CTL200  (ASCII, 115200 8N1, "\r\n", ">>" prompt)  -> UART2
//     ESP32 GPIO17 (TX2) -> CTL200 RX,  GPIO16 (RX2) <- CTL200 TX,  GND
//
//   Agiltron M511   (binary 0x55AA packets, 115200 8N1)       -> UART1
//     ESP32 GPIO26 (TX1) -> M511 RX(pin3), GPIO25 (RX1) <- M511 TX(pin7), GND
//   (UART1 default pins clash with SPI flash on WROOM, so remap to 26/25.)
#define KOHERON_UART_NUM   2
#define KOHERON_TX_PIN     17
#define KOHERON_RX_PIN     16
#define KOHERON_BAUD       115200

#define AGILTRON_UART_NUM  1
#define AGILTRON_TX_PIN    26
#define AGILTRON_RX_PIN    25
#define AGILTRON_BAUD      115200

// ── Static IP ───────────────────────────────────────────────────────
// Pinned to .150 (free as of 2026-06-17) to avoid the DHCP clash with the
// BKtel EDFA Pi on .101. Comment out USE_STATIC_IP to fall back to DHCP.
#define USE_STATIC_IP
#define STATIC_IP_OCTETS  192, 168, 0, 150
#define GATEWAY_OCTETS    192, 168, 0, 1
#define SUBNET_OCTETS     255, 255, 255, 0
#define DNS_OCTETS        192, 168, 0, 1

// ── Timing ──────────────────────────────────────────────────────────
#define PUBLISH_INTERVAL_MS   2000   // telemetry cadence
#define MQTT_RECONNECT_MS     5000

// PubSubClient's default 256-byte buffer is too small for discovery
// payloads that embed the device block; bump it.
#define MQTT_BUFFER_SIZE      1024