#ifndef LWIPOPTS_H
#define LWIPOPTS_H

#include <stdint.h>

// Minimal lwIP configuration for Pico W (CYW43) with DHCP.
// This is intentionally small: we only need basic IPv4 + DHCP to get an address.

// No RTOS
#define NO_SYS                      1

// Memory options
#define MEM_LIBC_MALLOC             0
#define MEM_ALIGNMENT               4
#define MEM_SIZE                    (16 * 1024)

// Pbuf options
#define PBUF_POOL_SIZE              24
#define PBUF_POOL_BUFSIZE           1700

// Link layer
#define LWIP_ARP                    1
#define LWIP_ETHERNET               1

// IP options
#define LWIP_IPV4                   1
#define LWIP_IPV6                   0
#define IP_REASSEMBLY               0
#define IP_FRAG                     0

// DHCP (client)
#define LWIP_DHCP                   1

// Increase timeout slots (DHCP + DNS + TCP + MQTT can consume several; retries can amplify this).
#define MEMP_NUM_SYS_TIMEOUT        24

// Optional helpers (kept off unless needed)
#define LWIP_DNS                    1
#define LWIP_UDP                    1
#define LWIP_TCP                    1

// MQTT needs an output ring buffer large enough for topic+payload.
// Default (256) is too small for our JSON payload and results in ERR_MEM (-1).
#define MQTT_OUTPUT_RINGBUF_SIZE     1024

// Sockets / netconn APIs not used
#define LWIP_SOCKET                 0
#define LWIP_NETCONN                0

// Checksums
#define CHECKSUM_GEN_IP             1
#define CHECKSUM_GEN_UDP            1
#define CHECKSUM_GEN_TCP            1
#define CHECKSUM_CHECK_IP           1
#define CHECKSUM_CHECK_UDP          1
#define CHECKSUM_CHECK_TCP          1

// Stats disabled
#define LWIP_STATS                  0

// Debug disabled
#define LWIP_DEBUG                  0

#endif // LWIPOPTS_H