Abstraction

// Abstract Class - القالب المجرد
abstract class SmartDevice {
  protected isOn: boolean = false;
  
  // Regular method - جاهزة للاستخدام
  togglePower(): void {
    this.isOn = !this.isOn;
    if (this.isOn) {
      this.turnOn();
    } else {
      this.turnOff();
    }
  }

  // Abstract Methods - لازم تتنفذ
  abstract turnOn(): void;
  abstract turnOff(): void;
  abstract getStatus(): string;
}

// Implementation 1 - TV
class SmartTV extends SmartDevice {
  turnOn(): void {
    console.log("📺 TV is now ON");
  }
  
  turnOff(): void {
    console.log("📺 TV is now OFF");
  }
  
  getStatus(): string {
    return this.isOn ? "Playing" : "Off";
  }
}

// Implementation 2 - AC
class SmartAC extends SmartDevice {
  turnOn(): void {
    console.log("❄️ AC is cooling");
  }
  
  turnOff(): void {
    console.log("❄️ AC stopped");
  }
  
  getStatus(): string {
    return this.isOn ? "Cooling" : "Off";
  }
}