#pragma once

#include <CrossPointSettings.h>
#include <GfxRenderer.h>
#include <HalGPIO.h>
#include <HalTiltSensor.h>
#include <Logging.h>

#include "MappedInputManager.h"

namespace ReaderUtils {

constexpr unsigned long GO_HOME_MS = 1000;
constexpr unsigned long SKIP_HOLD_MS = 700;
constexpr unsigned long BOOKMARK_HOLD_MS = 400;
constexpr unsigned long BOOKMARK_MESSAGE_DURATION_MS = 2500;
// Press-and-hold in the center touch zone (see detectTouchPageTurn) opens the
// reader menu, the touch analogue of releasing the Confirm button.
constexpr unsigned long TOUCH_MENU_HOLD_MS = 400;

inline void applyOrientation(GfxRenderer& renderer, const uint8_t orientation) {
  switch (orientation) {
    case CrossPointSettings::ORIENTATION::PORTRAIT:
      renderer.setOrientation(GfxRenderer::Orientation::Portrait);
      break;
    case CrossPointSettings::ORIENTATION::LANDSCAPE_CW:
      renderer.setOrientation(GfxRenderer::Orientation::LandscapeClockwise);
      break;
    case CrossPointSettings::ORIENTATION::INVERTED:
      renderer.setOrientation(GfxRenderer::Orientation::PortraitInverted);
      break;
    case CrossPointSettings::ORIENTATION::LANDSCAPE_CCW:
      renderer.setOrientation(GfxRenderer::Orientation::LandscapeCounterClockwise);
      break;
    default:
      break;
  }
}

struct PageTurnResult {
  bool prev;
  bool next;
  bool fromTilt;
};

inline PageTurnResult detectPageTurn(const MappedInputManager& input) {
  const bool usePress = SETTINGS.longPressButtonBehavior == SETTINGS.OFF;
  const bool tiltNext = SETTINGS.tiltPageTurn && halTiltSensor.wasTiltedForward();
  const bool tiltPrev = SETTINGS.tiltPageTurn && halTiltSensor.wasTiltedBack();
  const bool swapFront =
      SETTINGS.frontButtonFollowOrientation && (SETTINGS.orientation == CrossPointSettings::INVERTED ||
                                                SETTINGS.orientation == CrossPointSettings::LANDSCAPE_CCW);
  const auto prevButton = swapFront ? MappedInputManager::Button::Right : MappedInputManager::Button::Left;
  const auto nextButton = swapFront ? MappedInputManager::Button::Left : MappedInputManager::Button::Right;
  const bool prev =
      tiltPrev ||
      (usePress ? (input.wasPressed(MappedInputManager::Button::PageBack) || input.wasPressed(prevButton))
                : (input.wasReleased(MappedInputManager::Button::PageBack) || input.wasReleased(prevButton)));
  const bool powerTurn = SETTINGS.shortPwrBtn == CrossPointSettings::SHORT_PWRBTN::PAGE_TURN &&
                         input.wasReleased(MappedInputManager::Button::Power);
  const bool next = tiltNext || (usePress ? (input.wasPressed(MappedInputManager::Button::PageForward) || powerTurn ||
                                             input.wasPressed(nextButton))
                                          : (input.wasReleased(MappedInputManager::Button::PageForward) || powerTurn ||
                                             input.wasReleased(nextButton)));
  return {prev, next, tiltPrev || tiltNext};
}

// Touch reader controls: left third = page back, right third = forward, center =
// open menu on press-and-hold (see isTouchMenuGesture). heldMs is the contact
// duration, for the same long-press behavior as the buttons (chapter skip).
// All-false on Xteink (no touch) or when the setting is off.
struct TouchPageTurn {
  bool prev;
  bool next;
  bool center;
  unsigned long heldMs;
};

inline TouchPageTurn detectTouchPageTurn(GfxRenderer& renderer) {
  TouchPageTurn result{false, false, false, 0};
  if (gpio.isXteinkDevice() || !SETTINGS.touchReaderControls) {
    return result;
  }
  float nx = 0.0f, ny = 0.0f;
  if (!gpio.wasTouchTap(nx, ny)) {
    return result;
  }
  int lx = 0, ly = 0;
  renderer.tapToLogical(nx, ny, lx, ly);
  const int third = renderer.getScreenWidth() / 3;
  if (lx < third) {
    result.prev = true;
  } else if (lx >= 2 * third) {
    result.next = true;
  } else {
    result.center = true;
  }
  result.heldMs = gpio.lastTouchHeldMs();
  return result;
}

// True when the center zone was pressed and held long enough to open the reader
// menu (touch analogue of a Confirm release).
inline bool isTouchMenuGesture(const TouchPageTurn& touch) {
  return touch.center && touch.heldMs >= TOUCH_MENU_HOLD_MS;
}

inline void displayWithRefreshCycle(const GfxRenderer& renderer, int& pagesUntilFullRefresh) {
  if (pagesUntilFullRefresh <= 1) {
    renderer.displayBuffer(HalDisplay::HALF_REFRESH);
    pagesUntilFullRefresh = SETTINGS.getRefreshFrequency();
  } else {
    renderer.displayBuffer();
    pagesUntilFullRefresh--;
  }
}

// Grayscale anti-aliasing pass. Renders content twice (LSB + MSB) to build
// the grayscale buffer. Only the content callback is re-rendered — status bars
// and other overlays should be drawn before calling this.
// Kept as a template to avoid std::function overhead; instantiated once per reader type.
template <typename RenderFn>
void renderAntiAliased(GfxRenderer& renderer, RenderFn&& renderFn) {
  if (!renderer.storeBwBuffer()) {
    LOG_ERR("READER", "Failed to store BW buffer for anti-aliasing");
    return;
  }

  renderer.clearScreen(0x00);
  renderer.setRenderMode(GfxRenderer::GRAYSCALE_LSB);
  renderFn();
  renderer.copyGrayscaleLsbBuffers();

  renderer.clearScreen(0x00);
  renderer.setRenderMode(GfxRenderer::GRAYSCALE_MSB);
  renderFn();
  renderer.copyGrayscaleMsbBuffers();

  renderer.displayGrayBuffer();
  renderer.setRenderMode(GfxRenderer::BW);

  renderer.restoreBwBuffer();
}

}  // namespace ReaderUtils