#include <LiquidCrystal.h>


const int button_up = A0;//按键“↑”定义：A0
const int button_down = A1;//按键“↓”定义：A1
const int button_set = A2;//按键“功能”定义：A2
const int laba = 2;
const bool sleep = true;
LiquidCrystal lcd(13, 12, 11, 10, 9, 8);//显示器引脚定义
int init_time = 0;
int S_SETS[3][2] = {{1289, 21}, {25, 369}, {1256, 25}};

void setup() {
  Serial.begin(9600);
  pinMode(button_up, INPUT_PULLUP);
  pinMode(button_down, INPUT_PULLUP);
  pinMode(button_set, INPUT_PULLUP);
  lcd.begin(16, 2);
}

void loop() {
  welcome(); //显示初始欢迎文本
  int btn_down_state = btn_down();
  if (btn_down_state == 3) { //获取设置按钮状态并是否进入设置界面

    for (int i = 1; i < 4; i++) { //设置距离初始值；前置检测测距个数，根据个数修改数组？？？？
      set_data(i);
    }


  }

  show_running_data();

}
void welcome() { //显示初始欢迎文本
  while (1) {
    if (init_time < 3) {
      lcd.setCursor(0, 0);
      lcd.print(" Control System");
      lcd.setCursor(0, 1);
      lcd.print("By Jonathan_zfl!");
      tone(laba, 2000, 600);
      delay(1000);
      lcd.clear();
      if (init_time < 2)
      {
        delay(300);
      }
      init_time++;
      return;
    }
    break;
  }
}
int btn_down() {//检测按键 0：无按钮按下;1:按钮1按下；2：按钮2按下；3：按钮3按下
  int state = 0;
  if (digitalRead(button_up) == LOW) {
    delay(10);
    if (digitalRead(button_up) == LOW) {
      tone(laba, 2500, 100);
      state = 1;
      while (!digitalRead(button_up));
    }
  }

  if (digitalRead(button_down) == LOW) {
    delay(10);
    if (digitalRead(button_down) == LOW) {
      tone(laba, 2500, 100);
      state = 2;
      while (!digitalRead(button_down));
    }
  }

  if (digitalRead(button_set) == LOW) {
    delay(10);
    if (digitalRead(button_set) == LOW) {
      tone(laba, 2500, 100);
      state = 3;
      while (!digitalRead(button_set));
    }
  }
  return state;
}

String lcd_print(int i) {



}

void show_running_data() {
  lcd.setCursor(0, 0);//获取设备运行状态信息并显示
  lcd.print("S1:1236 S2:3653");
  lcd.setCursor(0, 1);
  lcd.print("S3:0028 MT:run~");

}

void set_data(int S) {

  int cursor_arr[8] = {3, 4, 5, 6, 11, 12, 13, 14};
  lcd.clear();
  lcd.setCursor(5, 0);
  lcd.print("SET:S" + String(S));

  String lo_str = String(S_SETS[S - 1][0]);
  String hi_str = String(S_SETS[S - 1][1]);
  int len_lo = lo_str.length();
  int len_hi = hi_str.length();
  if (len_lo < 4) {
    for (int i = 0; i < 4 - len_lo; i++) {
      lo_str = "0" + lo_str;
    }
  }
  if (len_hi < 4) {
    for (int j = 0; j < 4 - len_hi; j++) {
      hi_str = "0" + hi_str;
    }
  }
  lcd.setCursor(0, 1);
  String re = "L:[" + lo_str + "]H:[" + hi_str + "]";
  lcd.print(re);


  lcd.cursor();
  lcd.setCursor(cursor_arr[0], 1);

  int i = 0;

  while (1) {
    int state = btn_down();
    if (state == 1) {
      if (i < 4) {
        int s = (lo_str.substring(i, i + 1)).toInt() + 1;
        if (s > 9) {
          lo_str.setCharAt(i, '0');
        } else {
          lo_str.setCharAt(i, String(s)[0]);
        }
        lcd.write(lo_str[i]);
      } else {
        int j = i - 4;
        int s = (hi_str.substring(j, j + 1)).toInt() + 1;
        if (s > 9) {
          hi_str.setCharAt(j, '0');
        } else {
          hi_str.setCharAt(j, String(s)[0]);
        }
        lcd.write(hi_str[j]);
      }



      lcd.noCursor();
      lcd.setCursor(cursor_arr[i], 1);
      lcd.cursor();
    }
    if (state == 2) {
      if (i > 6) {
        i = 0;
      } else {
        i = i + 1;
      }
      lcd.setCursor(cursor_arr[i], 1);
    }
    if (state == 3) {
      S_SETS[S - 1][0] = lo_str.toInt();
      S_SETS[S - 1][1] = hi_str.toInt();
      Serial.println(S_SETS[S - 1][0]);
      Serial.println(S_SETS[S - 1][1]);
      lcd.noCursor();
      break;
    }

  }
  lcd.clear();
}