#include "celrs/crsf.h"
#include "celrs/serial.h"
#include "celrs/logger.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef _WIN32
#include <windows.h>
#else
#include <time.h>
#endif

static void sleep_ms(int ms) {
#ifdef _WIN32
    Sleep((DWORD)ms);
#else
    struct timespec ts = {.tv_sec = ms / 1000, .tv_nsec = (ms % 1000) * 1000000L};
    nanosleep(&ts, NULL);
#endif
}

static void print_usage(char const* prog) {
    printf("Usage: %s --port <serial_port> [--baudrate <rate>] [interval_ms]\n", prog);
    printf("       %s --list\n", prog);
    printf("  --port <serial_port> : COM3 (Windows) or /dev/ttyUSB0 (Linux)\n");
    printf("  --baudrate <rate>    : baud rate (default 400000)\n");
    printf("  interval_ms          : poll interval in ms (default 200)\n");
    printf("  --list               : list available serial ports and exit\n");
}

static int list_ports(void) {
    char** ports = NULL;
    int count = cel_serial_list_ports(&ports, 0);
    if (count < 0) {
        cel_log_err("Failed to list serial ports");
        return 1;
    }

    for (int i = 0; i < count; i++) {
        printf("%s\n", ports[i]);
    }

    cel_serial_free_ports(ports, count);
    return 0;
}

int main(int argc, char const* argv[]) {
    char const* port_path = NULL;
    int baud_rate = 400000;
    int interval_ms = 200;

    for (int i = 1; i < argc; i++) {
        if (strcmp(argv[i], "--list") == 0) {
            return list_ports();
        } else if (strcmp(argv[i], "--port") == 0 && i + 1 < argc) {
            port_path = argv[++i];
        } else if (strcmp(argv[i], "--baudrate") == 0 && i + 1 < argc) {
            baud_rate = atoi(argv[++i]);
            if (baud_rate <= 0) baud_rate = 400000;
        } else {
            interval_ms = atoi(argv[i]);
            if (interval_ms <= 0) interval_ms = 200;
        }
    }

    if (port_path == NULL) {
        print_usage(argv[0]);
        return 1;
    }

    /* Open serial port */
    cel_serial_port* port = cel_serial_open(port_path, baud_rate);
    if (port == NULL) {
        cel_log_err("Failed to open serial port");
        return 1;
    }

    char msg[256];
    snprintf(msg, sizeof(msg), "Connected to %s (%d baud)", port_path, baud_rate);
    cel_log_info(msg);

    /* TODO: implement telemetry read loop.
     * 1. Use cel_crsf_stream_create() for incremental parsing.
     * 2. Read raw bytes with cel_serial_read().
     * 3. Feed to cel_crsf_stream_feed() to extract frames.
     * 4. Parse telemetry with cel_crsf_telemetry_parse().
     * 5. Print link stats, battery, GPS, etc. */

    cel_serial_close(port);
    return 0;
}