/**
 * Detailed usage of the example can be found in the [README.md](./README.md) file
 */

#include <Arduino.h>
#include <esp_display_panel.hpp>
#include <lvgl.h>
#include "lvgl_v8_port.h"

using namespace esp_panel::drivers;

#define EXAMPLE_LCD_NAME                ILI9341
#define EXAMPLE_LCD_WIDTH               (320)
#define EXAMPLE_LCD_HEIGHT              (240)
#define EXAMPLE_LCD_COLOR_BITS          (16)
#define EXAMPLE_LCD_SPI_FREQ_HZ         (40 * 1000 * 1000)

#define EXAMPLE_LCD_SPI_IO_CS       (8)
#define EXAMPLE_LCD_SPI_IO_DC       (17)
#define EXAMPLE_LCD_SPI_IO_SCK      (15)
#define EXAMPLE_LCD_SPI_IO_SDA      (16)
#define EXAMPLE_LCD_SPI_IO_SDO      (-1)
#define EXAMPLE_LCD_RST_IO          (18)
#define EXAMPLE_LCD_RST_LEVEL       (1)
#define EXAMPLE_LCD_BL_IO           (7)
#define EXAMPLE_LCD_BL_ON_LEVEL     (1)
#define EXAMPLE_LCD_BL_OFF_LEVEL    (0)

#define EXAMPLE_TOUCH_NAME           FT5x06
#define EXAMPLE_TOUCH_ADDRESS        (0)
#define EXAMPLE_TOUCH_WIDTH          (320)
#define EXAMPLE_TOUCH_HEIGHT         (240)
#define EXAMPLE_TOUCH_I2C_FREQ_HZ    (400 * 1000)
#define EXAMPLE_TOUCH_READ_PERIOD_MS (130)

#define EXAMPLE_TOUCH_I2C_IO_SCL     (5)
#define EXAMPLE_TOUCH_I2C_IO_SDA     (4)
#define EXAMPLE_TOUCH_I2C_SCL_PULLUP (1)
#define EXAMPLE_TOUCH_I2C_SDA_PULLUP (1)
#define EXAMPLE_TOUCH_RST_IO         (-1)
#define EXAMPLE_TOUCH_RST_ACTIVE_LEVEL (0)
#define EXAMPLE_TOUCH_INT_IO         (-1)


#define _EXAMPLE_LCD_CLASS(name, ...)   LCD_##name(__VA_ARGS__)
#define EXAMPLE_LCD_CLASS(name, ...)    _EXAMPLE_LCD_CLASS(name, ##__VA_ARGS__)

#define _EXAMPLE_TOUCH_CLASS(name, ...) Touch##name(__VA_ARGS__)
#define EXAMPLE_TOUCH_CLASS(name, ...)  _EXAMPLE_TOUCH_CLASS(name, ##__VA_ARGS__)

static LCD *create_lcd_without_config(void)
{
    BusSPI *bus = new BusSPI(
        EXAMPLE_LCD_SPI_IO_CS, EXAMPLE_LCD_SPI_IO_DC, EXAMPLE_LCD_SPI_IO_SCK,
        EXAMPLE_LCD_SPI_IO_SDA, EXAMPLE_LCD_SPI_IO_SDO
    );

    return new EXAMPLE_LCD_CLASS(
        EXAMPLE_LCD_NAME, bus, EXAMPLE_LCD_WIDTH, EXAMPLE_LCD_HEIGHT, EXAMPLE_LCD_COLOR_BITS, EXAMPLE_LCD_RST_IO
    );
}

Touch *touch = nullptr;

static Touch *create_touch_without_config(void)
{
    BusI2C *bus = new BusI2C(
        EXAMPLE_TOUCH_I2C_IO_SCL, EXAMPLE_TOUCH_I2C_IO_SDA,
#if EXAMPLE_TOUCH_ADDRESS == 0
        (BusI2C::ControlPanelFullConfig)ESP_PANEL_TOUCH_I2C_CONTROL_PANEL_CONFIG(EXAMPLE_TOUCH_NAME)
#else
        (BusI2C::ControlPanelFullConfig)ESP_PANEL_TOUCH_I2C_CONTROL_PANEL_CONFIG_WITH_ADDR(EXAMPLE_TOUCH_NAME, EXAMPLE_TOUCH_ADDRESS)
#endif
    );

    return new EXAMPLE_TOUCH_CLASS(
        EXAMPLE_TOUCH_NAME, bus, EXAMPLE_TOUCH_WIDTH, EXAMPLE_TOUCH_HEIGHT,
        EXAMPLE_TOUCH_RST_IO, EXAMPLE_TOUCH_INT_IO
    );
}

void setup()
{
    Serial.begin(115200);

#if EXAMPLE_LCD_BL_IO >= 0
    Serial.println("Initializing backlight and turn it off");
    BacklightPWM_LEDC *backlight = new BacklightPWM_LEDC(EXAMPLE_LCD_BL_IO, EXAMPLE_LCD_BL_ON_LEVEL);
    backlight->begin();
    backlight->off();
#endif

    Serial.println("Initializing \"SPI\" LCD");
    auto lcd = create_lcd_without_config();
    auto bus = static_cast<BusSPI *>(lcd->getBus());
    bus->configSPI_FreqHz(EXAMPLE_LCD_SPI_FREQ_HZ);

    /* Startup the LCD and operate it */
    assert(lcd->begin());
    lcd->displayOn();

    touch = create_touch_without_config();
    auto bus2 = static_cast<BusI2C *>(touch->getBus());
    bus2->configI2C_FreqHz(EXAMPLE_TOUCH_I2C_FREQ_HZ);
    bus2->configI2C_PullupEnable(EXAMPLE_TOUCH_I2C_SDA_PULLUP, EXAMPLE_TOUCH_I2C_SCL_PULLUP);
    assert(touch->begin());

    //Serial.println("Draw color bar from top left to bottom right, the order is B - G - R");
    //lcd->colorBarTest();

#if EXAMPLE_LCD_BL_IO >= 0
    Serial.println("Turn on the backlight");
    backlight->on();

    lvgl_port_init(lcd, touch);
    lvgl_port_lock(-1);
    lv_obj_t *label_1 = lv_label_create(lv_scr_act());
    lv_label_set_text(label_1, "Hello World!");
    lv_obj_set_style_text_font(label_1, &lv_font_montserrat_30, 0);
    lv_obj_align(label_1, LV_ALIGN_CENTER, 0, -20);
    lv_obj_t *label_2 = lv_label_create(lv_scr_act());
    lv_label_set_text_fmt(
        label_2, "ESP32_Display_Panel (%d.%d.%d)",
        ESP_PANEL_VERSION_MAJOR, ESP_PANEL_VERSION_MINOR, ESP_PANEL_VERSION_PATCH
    );
    lv_obj_set_style_text_font(label_2, &lv_font_montserrat_16, 0);
    lv_obj_align_to(label_2, label_1, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
    lv_obj_t *label_3 = lv_label_create(lv_scr_act());
    lv_label_set_text_fmt(label_3, "LVGL (%d.%d.%d)", LVGL_VERSION_MAJOR, LVGL_VERSION_MINOR, LVGL_VERSION_PATCH);
    lv_obj_set_style_text_font(label_3, &lv_font_montserrat_16, 0);
    lv_obj_align_to(label_3, label_2, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
    lvgl_port_unlock();

#endif

}

void loop()
{
   // Read all touch points and buttons
    touch->readRawData(-1, -1, EXAMPLE_TOUCH_READ_PERIOD_MS);

    std::vector<TouchPoint> points;
    int i = 0;
    touch->getPoints(points);
    for (auto &point : points) {
        Serial.printf("Touch point(%d): x %d, y %d, strength %d\n", i++, point.x, point.y, point.strength);
    }

    std::vector<TouchButton> buttons;
    i = 0;
    touch->getButtons(buttons);
    for (auto &button : buttons) {
        Serial.printf("Touch button(%d): %d\n", i++, button.second);
    }

    if (!touch->isInterruptEnabled()) {
        delay(EXAMPLE_TOUCH_READ_PERIOD_MS);
    }
}