#include "bp1658cj.h"
#include "esphome/core/log.h"

namespace esphome::bp1658cj {

static const char *const TAG = "bp1658cj";

static const uint8_t BP1658CJ_MODEL_ID = 0x80;
static const uint8_t BP1658CJ_ADDR_STANDBY = 0x0;
static const uint8_t BP1658CJ_ADDR_START_3CH = 0x10;
static const uint8_t BP1658CJ_ADDR_START_2CH = 0x20;
static const uint8_t BP1658CJ_ADDR_START_5CH = 0x30;

static const uint8_t BP1658CJ_DELAY = 2;

void BP1658CJ::setup() {
  this->data_pin_->setup();
  this->data_pin_->digital_write(false);
  this->clock_pin_->setup();
  this->clock_pin_->digital_write(false);
  this->pwm_amounts_.resize(5, 0);
}
void BP1658CJ::dump_config() {
  ESP_LOGCONFIG(TAG,
                "BP1658CJ:\n"
                "  Color Channels Max Power: %u\n"
                "  White Channels Max Power: %u",
                this->max_power_color_channels_, this->max_power_white_channels_);
  LOG_PIN("  Data Pin: ", this->data_pin_);
  LOG_PIN("  Clock Pin: ", this->clock_pin_);
}

void BP1658CJ::loop() {
  if (!this->update_)
    return;

  uint8_t data[12];
  if (this->pwm_amounts_[0] == 0 && this->pwm_amounts_[1] == 0 && this->pwm_amounts_[2] == 0 &&
      this->pwm_amounts_[3] == 0 && this->pwm_amounts_[4] == 0) {
    for (int i = 1; i < 12; i++)
      data[i] = 0;

    // First turn all channels off
    data[0] = BP1658CJ_MODEL_ID + BP1658CJ_ADDR_START_5CH;
    this->write_buffer_(data, 12);
    // Then sleep
    data[0] = BP1658CJ_MODEL_ID + BP1658CJ_ADDR_STANDBY;
    this->write_buffer_(data, 12);
  } else if (this->pwm_amounts_[0] == 0 && this->pwm_amounts_[1] == 0 && this->pwm_amounts_[2] == 0 &&
             (this->pwm_amounts_[3] > 0 || this->pwm_amounts_[4] > 0)) {
    // Only data on white channels
    data[0] = BP1658CJ_MODEL_ID + BP1658CJ_ADDR_START_2CH;
    data[1] = 0 << 4 | this->max_power_white_channels_;
    for (int i = 2, j = 0; i < 12; i += 2, j++) {
      data[i] = this->pwm_amounts_[j] & 0x1F;
      data[i + 1] = (this->pwm_amounts_[j] >> 5) & 0x1F;
    }
    this->write_buffer_(data, 12);
  } else if ((this->pwm_amounts_[0] > 0 || this->pwm_amounts_[1] > 0 || this->pwm_amounts_[2] > 0) &&
             this->pwm_amounts_[3] == 0 && this->pwm_amounts_[4] == 0) {
    // Only data on RGB channels
    data[0] = BP1658CJ_MODEL_ID + BP1658CJ_ADDR_START_3CH;
    data[1] = this->max_power_color_channels_ << 4 | 0;
    for (int i = 2, j = 0; i < 12; i += 2, j++) {
      data[i] = this->pwm_amounts_[j] & 0x1F;
      data[i + 1] = (this->pwm_amounts_[j] >> 5) & 0x1F;
    }
    this->write_buffer_(data, 12);
  } else {
    // All channels
    data[0] = BP1658CJ_MODEL_ID + BP1658CJ_ADDR_START_5CH;
    data[1] = this->max_power_color_channels_ << 4 | this->max_power_white_channels_;
    for (int i = 2, j = 0; i < 12; i += 2, j++) {
      data[i] = this->pwm_amounts_[j] & 0x1F;
      data[i + 1] = (this->pwm_amounts_[j] >> 5) & 0x1F;
    }
    this->write_buffer_(data, 12);
  }

  this->update_ = false;
}

void BP1658CJ::set_channel_value_(uint8_t channel, uint16_t value) {
  if (this->pwm_amounts_[channel] != value) {
    this->update_ = true;
    this->update_channel_ = channel;
  }
  this->pwm_amounts_[channel] = value;
}

void BP1658CJ::write_bit_(bool value) {
  this->data_pin_->digital_write(value);
  delayMicroseconds(BP1658CJ_DELAY);
  this->clock_pin_->digital_write(true);
  delayMicroseconds(BP1658CJ_DELAY);
  this->clock_pin_->digital_write(false);
  delayMicroseconds(BP1658CJ_DELAY);
}

void BP1658CJ::write_byte_(uint8_t data) {
  for (uint8_t mask = 0x80; mask; mask >>= 1) {
    this->write_bit_(data & mask);
  }

  // ack bit
  this->data_pin_->pin_mode(gpio::FLAG_INPUT);
  this->clock_pin_->digital_write(true);
  delayMicroseconds(BP1658CJ_DELAY);
  this->clock_pin_->digital_write(false);
  delayMicroseconds(BP1658CJ_DELAY);
  this->data_pin_->pin_mode(gpio::FLAG_OUTPUT);
}

void BP1658CJ::write_buffer_(uint8_t *buffer, uint8_t size) {
  this->data_pin_->digital_write(false);
  delayMicroseconds(BP1658CJ_DELAY);
  this->clock_pin_->digital_write(false);
  delayMicroseconds(BP1658CJ_DELAY);

  for (uint32_t i = 0; i < size; i++) {
    this->write_byte_(buffer[i]);
  }

  this->clock_pin_->digital_write(true);
  delayMicroseconds(BP1658CJ_DELAY);
  this->data_pin_->digital_write(true);
  delayMicroseconds(BP1658CJ_DELAY);
}

}  // namespace esphome::bp1658cj
