#include "pms5003.h"
#include "driver/gpio.h"
#include "driver/uart.h"
#include "hal/gpio_types.h"
#include "hal/uart_types.h"

#define START_CHAR_1 0x42
#define START_CHAR_2 0x4d

#define DEFAULT_BAUD 9600

static const char* TAG = "PMS5003";

pms5003_err pms5003_init() {
  const uart_port_t uart_num = CONFIG_PMS5003_UART_PORT;
  uart_set_pin(uart_num, CONFIG_PMS5003_UART_TX, CONFIG_PMS5003_UART_RX, -1, -1);
  uart_config_t uart_config = {
      .baud_rate = DEFAULT_BAUD,
      .data_bits = UART_DATA_8_BITS,
      .parity = UART_PARITY_DISABLE,
      .stop_bits = UART_STOP_BITS_1,
      .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
      .rx_flow_ctrl_thresh = 122, // No idea what this does - it's a default I found somewhere
  };
  gpio_set_direction(CONFIG_PMS5003_SET_GPIO, GPIO_MODE_DEF_OUTPUT);
  // Datasheet has 10k pull-up
  gpio_set_pull_mode(CONFIG_PMS5003_SET_GPIO, GPIO_PULLUP_ONLY);
  return PMS5003_OK;
}

pms5003_err pms5003_read(void) {
  // uart_read_bytes
  //   2 Start Bytes
  //   2 Frame Length Bytes
  //   26 (1 -> 13 pairs) Data Bytes (with nothing in 13)
  //   2 Check Bytes - I think just add the low bits???
  //   32 Bytes Total

  return PMS5003_OK;
}