// lora_tx.cpp — LR1121 transmit test
// Usage: sudo ./lora_tx [-v] [--433|--868|--24|freq_hz] [--lp|--hp] [--dbm=N]
//                       [--busy-gpio=N] [--reset-gpio=N] [--dio9-gpio=N]
//   -v       verbose step labels (shows exactly where init hangs)
//   --433    433.05 MHz (default)
//   --868    868 MHz
//   --24     2403 MHz
//   freq_hz  any raw frequency in Hz
//
// Requires SPI: sudo raspi-config → Interfaces → SPI → Yes → reboot
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <thread>
#include <chrono>
#include "lr1121_malnus.hpp"

int main(int argc, char **argv)
{
    lr1121::Config cfg;
    cfg.verbose  = false;
    cfg.pa_sel   = 0x00;  // LP default: avoids LBD on weak VBAT rails
    cfg.tx_dbm   = 10;
    cfg.sf       = 0x07;  // SF7
    cfg.bw       = 0x04;  // 125 kHz
    cfg.cr       = 0x01;  // CR 4/5

    for (int i = 1; i < argc; ++i) {
        if      (std::strcmp(argv[i], "-v")    == 0) cfg.verbose  = true;
        else if (std::strcmp(argv[i], "--433") == 0) cfg.freq_hz  = lr1121::FREQ_433;
        else if (std::strcmp(argv[i], "--868") == 0) cfg.freq_hz  = lr1121::FREQ_868;
        else if (std::strcmp(argv[i], "--24")  == 0 ||
                 std::strcmp(argv[i], "--2g4") == 0) cfg.freq_hz  = lr1121::FREQ_2400;
        else if (std::strcmp(argv[i], "--hp") == 0) cfg.pa_sel = 0x01;
        else if (std::strcmp(argv[i], "--lp") == 0) cfg.pa_sel = 0x00;
        else if (std::strncmp(argv[i], "--dbm=", 6) == 0) cfg.tx_dbm = (int8_t)std::atoi(argv[i] + 6);
        else if (std::strncmp(argv[i], "--busy-gpio=", 12) == 0) cfg.busy_gpio = (unsigned)std::strtoul(argv[i] + 12, nullptr, 10);
        else if (std::strncmp(argv[i], "--reset-gpio=", 13) == 0) cfg.reset_gpio = (unsigned)std::strtoul(argv[i] + 13, nullptr, 10);
        else if (std::strncmp(argv[i], "--dio9-gpio=", 12) == 0) cfg.dio9_gpio = (unsigned)std::strtoul(argv[i] + 12, nullptr, 10);
        else cfg.freq_hz = (uint32_t)std::strtoul(argv[i], nullptr, 10);
    }

    std::printf("lora_tx: %u Hz  SF%u  BW=0x%02X  PA=%s  PWR=%d dBm  gpio(busy=%u reset=%u dio9=%u)%s\n",
                cfg.freq_hz, cfg.sf, cfg.bw,
                cfg.pa_sel ? "HP" : "LP", (int)cfg.tx_dbm,
                cfg.busy_gpio, cfg.reset_gpio, cfg.dio9_gpio,
                cfg.verbose ? "  [verbose]" : "");

    lr1121::Radio radio;
    if (!radio.begin(cfg)) {
        std::fprintf(stderr, "ERROR: radio init failed\n"
                             "  Check: SPI enabled? wiring? DIO5/DIO6 connected?\n"
                             "  If fw looks like bootloader: sudo ./lora_rx --reset\n"
                             "  Run with -v for step-by-step output\n");
        return 1;
    }
    auto ver = radio.getVersion();
    if (ver.fw_hi < 0x02)
        std::fprintf(stderr, "hint: fw=0x%02X%02X — try: sudo ./lora_rx --reset\n",
                     ver.fw_hi, ver.fw_lo);
    std::printf("Radio OK — sending every second\n");

    for (int n = 0; ; ++n) {
        char msg[32];
        int  len = std::snprintf(msg, sizeof(msg), "hello %d", n);
        bool ok  = radio.send((const uint8_t *)msg, (uint8_t)len);
        std::printf("[%4d] tx '%s' → %s\n", n, msg, ok ? "OK" : "TIMEOUT");
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }

    radio.end();
    return 0;
}