#include "displayapp/LittleVgl.h"
#include "displayapp/lv_pinetime_theme.h"

#include <FreeRTOS.h>
#include <task.h>
////#include <projdefs.h>
#include "drivers/Cst816s.h"
#include "drivers/St7789.h"

using namespace Pinetime::Components;

lv_style_t* LabelBigStyle = nullptr;

static void disp_flush(lv_disp_drv_t* disp_drv, const lv_area_t* area, lv_color_t* color_p) {
  auto* lvgl = static_cast<LittleVgl*>(disp_drv->user_data);
  lvgl->FlushDisplay(area, color_p);
}

static void rounder(lv_disp_drv_t* disp_drv, lv_area_t* area) {
  auto* lvgl = static_cast<LittleVgl*>(disp_drv->user_data);
  if (lvgl->GetFullRefresh()) {
    area->x1 = 0;
    area->x2 = LV_HOR_RES - 1;
    area->y1 = 0;
    area->y2 = LV_VER_RES - 1;
  }
}

bool touchpad_read(lv_indev_drv_t* indev_drv, lv_indev_data_t* data) {
  auto* lvgl = static_cast<LittleVgl*>(indev_drv->user_data);
  return lvgl->GetTouchPadInfo(data);
}

LittleVgl::LittleVgl(Pinetime::Drivers::St7789& lcd, Pinetime::Drivers::Cst816S& touchPanel)
  : lcd {lcd}, touchPanel {touchPanel} {
}

void LittleVgl::Init() {
//  lv_init();
//  InitTheme();
//  InitDisplay();
  InitTouchpad();
}

void LittleVgl::InitDisplay() {
  lv_disp_buf_init(&disp_buf_2, buf2_1, buf2_2, LV_HOR_RES_MAX * 4); /*Initialize the display buffer*/
  lv_disp_drv_init(&disp_drv);                                       /*Basic initialization*/

  /*Set up the functions to access to your display*/

  /*Set the resolution of the display*/
  disp_drv.hor_res = 240;
  disp_drv.ver_res = 240;

  /*Used to copy the buffer's content to the display*/
  disp_drv.flush_cb = disp_flush;
  /*Set a display buffer*/
  disp_drv.buffer = &disp_buf_2;
  disp_drv.user_data = this;
  disp_drv.rounder_cb = rounder;

  /*Finally register the driver*/
  lv_disp_drv_register(&disp_drv);
}

void LittleVgl::InitTouchpad() {
  lv_indev_drv_t indev_drv;

  lv_indev_drv_init(&indev_drv);
  indev_drv.type = LV_INDEV_TYPE_POINTER;
  indev_drv.read_cb = touchpad_read;
  indev_drv.user_data = this;
  lv_indev_drv_register(&indev_drv);
}

void LittleVgl::SetFullRefresh(FullRefreshDirections direction) {
  if (scrollDirection == FullRefreshDirections::None) {
    scrollDirection = direction;
    if (scrollDirection == FullRefreshDirections::Down) {
      lv_disp_set_direction(lv_disp_get_default(), 1);
    } else if (scrollDirection == FullRefreshDirections::Right) {
      lv_disp_set_direction(lv_disp_get_default(), 2);
    } else if (scrollDirection == FullRefreshDirections::Left) {
      lv_disp_set_direction(lv_disp_get_default(), 3);
    } else if (scrollDirection == FullRefreshDirections::RightAnim) {
      lv_disp_set_direction(lv_disp_get_default(), 5);
    } else if (scrollDirection == FullRefreshDirections::LeftAnim) {
      lv_disp_set_direction(lv_disp_get_default(), 4);
    }
  }
  fullRefresh = true;
}

void LittleVgl::FlushDisplay(const lv_area_t* area, lv_color_t* color_p) {
//  uint16_t y1, y2, width, height = 0;
//
//  ulTaskNotifyTake(pdTRUE, 200);
//  // Notification is still needed (even if there is a mutex on SPI) because of the DataCommand pin
//  // which cannot be set/clear during a transfer.
//
//  if ((scrollDirection == LittleVgl::FullRefreshDirections::Down) && (area->y2 == visibleNbLines - 1)) {
//    writeOffset = ((writeOffset + totalNbLines) - visibleNbLines) % totalNbLines;
//  } else if ((scrollDirection == FullRefreshDirections::Up) && (area->y1 == 0)) {
//    writeOffset = (writeOffset + visibleNbLines) % totalNbLines;
//  }
//
//  y1 = (area->y1 + writeOffset) % totalNbLines;
//  y2 = (area->y2 + writeOffset) % totalNbLines;
//
//  width = (area->x2 - area->x1) + 1;
//  height = (area->y2 - area->y1) + 1;
//
//  if (scrollDirection == LittleVgl::FullRefreshDirections::Down) {
//
//    if (area->y2 < visibleNbLines - 1) {
//      uint16_t toScroll = 0;
//      if (area->y1 == 0) {
//        toScroll = height * 2;
//        scrollDirection = FullRefreshDirections::None;
//        lv_disp_set_direction(lv_disp_get_default(), 0);
//      } else {
//        toScroll = height;
//      }
//
//      if (scrollOffset >= toScroll)
//        scrollOffset -= toScroll;
//      else {
//        toScroll -= scrollOffset;
//        scrollOffset = (totalNbLines) -toScroll;
//      }
//      lcd.VerticalScrollStartAddress(scrollOffset);
//    }
//
//  } else if (scrollDirection == FullRefreshDirections::Up) {
//
//    if (area->y1 > 0) {
//      if (area->y2 == visibleNbLines - 1) {
//        scrollOffset += (height * 2);
//        scrollDirection = FullRefreshDirections::None;
//        lv_disp_set_direction(lv_disp_get_default(), 0);
//      } else {
//        scrollOffset += height;
//      }
//      scrollOffset = scrollOffset % totalNbLines;
//      lcd.VerticalScrollStartAddress(scrollOffset);
//    }
//  } else if (scrollDirection == FullRefreshDirections::Left or scrollDirection == FullRefreshDirections::LeftAnim) {
//    if (area->x2 == visibleNbLines - 1) {
//      scrollDirection = FullRefreshDirections::None;
//      lv_disp_set_direction(lv_disp_get_default(), 0);
//    }
//  } else if (scrollDirection == FullRefreshDirections::Right or scrollDirection == FullRefreshDirections::RightAnim) {
//    if (area->x1 == 0) {
//      scrollDirection = FullRefreshDirections::None;
//      lv_disp_set_direction(lv_disp_get_default(), 0);
//    }
//  }
//
//  if (y2 < y1) {
//    height = totalNbLines - y1;
//
//    if (height > 0) {
//      lcd.DrawBuffer(area->x1, y1, width, height, reinterpret_cast<const uint8_t*>(color_p), width * height * 2);
//      ulTaskNotifyTake(pdTRUE, 100);
//    }
//
//    uint16_t pixOffset = width * height;
//    height = y2 + 1;
//    lcd.DrawBuffer(area->x1, 0, width, height, reinterpret_cast<const uint8_t*>(color_p + pixOffset), width * height * 2);
//
//  } else {
//    lcd.DrawBuffer(area->x1, y1, width, height, reinterpret_cast<const uint8_t*>(color_p), width * height * 2);
//  }
//
//  // IMPORTANT!!!
//  // Inform the graphics library that you are ready with the flushing
//  lv_disp_flush_ready(&disp_drv);

  lv_disp_t *disp = lv_disp_get_default();
  lv_disp_drv_t *disp_drv = &disp->driver;
  lv_area_t area_trimmed = *area;
  if (area->x1 < 0)
    area_trimmed.x1 = 0;
  if (area->x2 >= LV_HOR_RES)
    area_trimmed.x2 = LV_HOR_RES-1;
  if (area->y1 < 0)
    area_trimmed.y1 = 0;
  if (area->y2 >= LV_VER_RES)
    area_trimmed.y2 = LV_VER_RES-1;
  // tell flush_cb this is the last thing to flush to get the monitor refreshed
  lv_disp_get_buf(disp)->flushing_last = true;
  disp_drv->flush_cb(disp_drv, &area_trimmed, color_p);
}

void LittleVgl::SetNewTouchPoint(uint16_t x, uint16_t y, bool contact) {
  tap_x = x;
  tap_y = y;
  tapped = contact;
}

bool LittleVgl::GetTouchPadInfo(lv_indev_data_t* ptr) {
  ptr->point.x = tap_x;
  ptr->point.y = tap_y;
  if (tapped) {
    ptr->state = LV_INDEV_STATE_PR;
  } else {
    ptr->state = LV_INDEV_STATE_REL;
  }
  return false;
}

void LittleVgl::InitTheme() {

  lv_theme_t* th = lv_pinetime_theme_init(LV_COLOR_WHITE,
                                          LV_COLOR_SILVER,
                                          0,
                                          &jetbrains_mono_bold_20,
                                          &jetbrains_mono_bold_20,
                                          &jetbrains_mono_bold_20,
                                          &jetbrains_mono_bold_20);

  lv_theme_set_act(th);
}