#pragma once
// The GT911 of the Elecrow CrowPanel 7.0" V3.0 hangs on a PCA9557 I/O expander (I2C 0x18): IO0 is its reset, IO1 its
// interrupt line, and it stays in reset until something drives them (firmware 0.2.82). This is Elecrow's own sequence
// from their V3.0 ESPHome example, byte for byte: every expander pin an output and low (the reset held, the interrupt
// line low so the chip takes address 0x5D), 20 ms, the reset released, 100 ms for the chip to come up, then the
// interrupt line back to an input. It runs after the I2C bus is up and before the GT911 driver looks for the chip
// (setup priority 700, between the bus's 1000 and the driver's 600), so the driver finds it at 0x5D. A V2.0 board
// has no expander: the writes fail, the log says so, and the GT911 boots by its pull-up as before.
//
// Only the Elecrow's board file builds this (`smart_display: elecrow_touch_reset:`, which sets the flag), so the
// header adds nothing to a CYD, which has no I2C at all.
#if defined(ESP_SCREENS_ELECROW_TOUCH_RESET) && ESP_SCREENS_ELECROW_TOUCH_RESET
#include "esphome/components/i2c/i2c.h"
#include "esphome/core/component.h"
#include "esphome/core/hal.h"
#include "esphome/core/log.h"

namespace elecrow {
class TouchReset : public esphome::Component, public esphome::i2c::I2CDevice {
 public:
  float get_setup_priority() const override { return 700.0f; }
  void setup() override {
    auto write = [this](uint8_t reg, uint8_t value) {
      const uint8_t data[2] = {reg, value};
      return this->write(data, sizeof(data)) == esphome::i2c::ERROR_OK;
    };
    bool ok = write(0x03, 0x00);          // configuration: every pin an output
    ok = write(0x01, 0x00) && ok;         // output: reset low, interrupt low (address 0x5D), the rest low
    esphome::delay(20);
    ok = write(0x01, 0x01) && ok;         // reset released, the interrupt line still low
    esphome::delay(100);
    ok = write(0x03, 0x02) && ok;         // the interrupt line an input again; the GT911 drives it from here
    if (ok) {
      ESP_LOGI("touch", "GT911 reset through the PCA9557 at 0x%02X", this->address_);
    } else {
      ESP_LOGW("touch", "No PCA9557 at 0x%02X: the GT911 was not reset (a V2.0 board boots it by its pull-up)", this->address_);
    }
  }
};
}  // namespace elecrow
#endif