#include "stdio.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "driver/i2c.h"
#include "i2c-lcd1602.h"

#define I2C_MASTER_SCL_IO    9
#define I2C_MASTER_SDA_IO    8
#define I2C_MASTER_NUM       I2C_NUM_0
#define I2C_MASTER_FREQ_HZ   100000
#define LCD_ADDR             0x27

#define PIR_SENSOR_GPIO      0
#define RED_LED_GPIO         2
#define GREEN_LED_GPIO       3
#define BLUE_LED_GPIO        10
#define BUZZER_GPIO          1

i2c_lcd1602_info_t *lcd_info;

static void i2c_master_init() {
    i2c_config_t conf = {
        .mode = I2C_MODE_MASTER,
        .sda_io_num = I2C_MASTER_SDA_IO,
        .scl_io_num = I2C_MASTER_SCL_IO,
        .sda_pullup_en = GPIO_PULLUP_ENABLE,
        .scl_pullup_en = GPIO_PULLUP_ENABLE,
        .master.clk_speed = I2C_MASTER_FREQ_HZ,
    };
    i2c_param_config(I2C_MASTER_NUM, &conf);
    i2c_driver_install(I2C_MASTER_NUM, conf.mode, 0, 0, 0);
}

static void gpio_setup() {
    gpio_set_direction(PIR_SENSOR_GPIO, GPIO_MODE_INPUT);

    gpio_set_direction(RED_LED_GPIO, GPIO_MODE_OUTPUT);
    gpio_set_direction(GREEN_LED_GPIO, GPIO_MODE_OUTPUT);
    gpio_set_direction(BLUE_LED_GPIO, GPIO_MODE_OUTPUT);
    gpio_set_direction(BUZZER_GPIO, GPIO_MODE_OUTPUT);
}

void app_main() {
    i2c_master_init();
    gpio_setup();

    lcd_info = i2c_lcd1602_malloc();
    i2c_lcd1602_init(lcd_info, I2C_MASTER_NUM, LCD_ADDR, 16, 2, I2C_LCD1602_CHARACTER_5x8);
    i2c_lcd1602_set_backlight(lcd_info, true);
    i2c_lcd1602_clear(lcd_info);
    i2c_lcd1602_write_string(lcd_info, "Hazir...");

    while (true) {
        int motion = gpio_get_level(PIR_SENSOR_GPIO);
        if (motion) {
            gpio_set_level(RED_LED_GPIO, 1);
            gpio_set_level(GREEN_LED_GPIO, 0);
            gpio_set_level(BLUE_LED_GPIO, 0);
            gpio_set_level(BUZZER_GPIO, 1);

            i2c_lcd1602_clear(lcd_info);
            i2c_lcd1602_write_string(lcd_info, "Hareket Algilandi!");
        } else {
            gpio_set_level(RED_LED_GPIO, 0);
            gpio_set_level(GREEN_LED_GPIO, 1);
            gpio_set_level(BLUE_LED_GPIO, 1);
            gpio_set_level(BUZZER_GPIO, 0);

            i2c_lcd1602_clear(lcd_info);
            i2c_lcd1602_write_string(lcd_info, "Bekleniyor...");
        }
        vTaskDelay(pdMS_TO_TICKS(500));
    }
}