#pragma once

#include <stdint.h>
#include <stdbool.h>
#include <time.h>
#include "driver/gpio.h"
#include "driver/uart.h"
#include "freertos/FreeRTOS.h"
#include "freertos/semphr.h"

typedef struct {
    uart_port_t uart_port;
    gpio_num_t tx_pin;
    gpio_num_t rx_pin;
    gpio_num_t pps_pin;
} gps_sync_config_t;

typedef struct {
    int64_t monotonic_us;   // Microseconds - never jumps backward
    int64_t monotonic_ms;   // Milliseconds - for easier logging
    int64_t gps_us;         // GPS UTC time in microseconds
    int64_t gps_ms;         // GPS UTC time in milliseconds
    struct timespec mono_ts; // POSIX timespec
    bool synced;            // true if GPS has valid fix
} gps_timestamp_t;

void gps_sync_init(const gps_sync_config_t *config, bool use_gps_log_timestamps);

void gps_force_next_update(void);
gps_timestamp_t gps_get_timestamp(void);
int64_t gps_get_monotonic_ms(void);
bool gps_is_synced(void);

// Internal logging hooks
uint32_t gps_log_timestamp(void);
int gps_log_vprintf(const char *fmt, va_list args);