class SoftwareEngineer {
    readonly name = 'Dmitriy'
    readonly lastName = 'Lomov'
    readonly birthdate = '12.07.1990'
    
    private technologies = {
        languages: [
            'JavaScript',
            'TypeScript'
        ],
        frontend: [
            'ReactJS',
            "NextJS",
            "GraphQL",
            'Redux',
            'RTK',
            'RTK Query',
            'MobX',
            'FSD',
            'Sass'
        ],
        backend: [
            'NodeJS',
            'Express',
            'NextJS'
        ],
        mobile: [
            'React Native',
            'Expo'
        ],
        UILibrary: [
            'MUI',
            'AntDesign',
            'NativeBase',
            'Mantine'
        ],
        dataBase: [
            'PostgreSQL',
            'MongoDB'
        ],
        other: [
            'git',
            'Docker',
            'Webpack',
            'Vite',
            'Figma'
        ]
    }
    
    private calculateAge() {
        const day = parseInt(this.birthdate.substring(0, 2));
        const month = parseInt(this.birthdate.substring(3, 5));
        const year = parseInt(this.birthdate.substring(6, 10));
        
        const today = new Date();
        const birthDate = new Date(year, month - 1, day);
        const m = today.getMonth() - birthDate.getMonth();
        
        let age = today.getFullYear() - birthDate.getFullYear();
        
        if (m < 0 || (m === 0 && today.getDate() < birthDate.getDate())) {
            age--;
        }
        
        return age;
    }
    
    get fullName() {
        return `${this.lastName} ${this.name}`
    }
    
    get age() {
        return this.calculateAge()
    }
    
    public greetStranger() {
        return `
           Hello! My name is ${this.fullName}. I am ${this.age} years old. Glad to see you on my page.
           That's what I can: ${JSON.stringify(this.technologies, null, 4)}
        `
    }
}

const I = new SoftwareEngineer()

I.greetStranger()