from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, Session
from .config import settings
from .models import Hard_skills

DATABASE_URL = f'postgresql://{settings.database_username}:{settings.database_password}@{settings.database_hostname}:{settings.database_port}/{settings.database_name}'

engine = create_engine(DATABASE_URL)

SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

def get_db():
    db = SessionLocal()
    
    try:
        yield db
    finally:
        db.close()

def init_db(session: Session):

    titles = [
        'C', 'C++', 'C#', 'Java', 'Python', 'Ruby', 'Ruby on Rails', 'R', 'Matlab', 'Django', 'NetBeans',
        'Scala', 'JavaScript', 'TypeScript', 'Go', 'Software Development', 'Application Development',
        'Web Applications', 'Object Oriented Programming', 'Aspect Oriented Programming', 'Concurrent Programming',
        'Mobile Development (iOS)', 'Mobile Development (Android)', 'Data Science', 'Data Analytics', 'Data Mining',
        'Data Visualization', 'Machine Learning', 'TensorFlow', 'PyTorch', 'Keras', 'Theano', 'Statistical Analysis',
        'Bayesian Analysis', 'Regression Analysis', 'Time Series Analysis', 'Clustering', 'K-means', 'KNN', 'Decision Trees',
        'Random Forest', 'Dimensionality Reduction', 'PCA', 'SVD', 'Gradient Descent', 'Stochastic Gradient Descent',
        'Outlier Detection', 'Frequent Itemset Mining', 'SQL', 'NoSQL', 'SQL Server', 'MS SQL Server', 'Apache Hadoop',
        'Apache Spark', 'Apache Airflow', 'Apache Impala', 'Apache Drill', 'HTML', 'CSS', 'React', 'Angular', 'Vue.js',
        'Node.js', 'Express.js', 'REST', 'SOAP', 'Web Platforms', 'System Architecture', 'Distributed Computing', 'AWS',
        'AWS Glue', 'Azure', 'Google Cloud Platform', 'Docker', 'Kubernetes', 'UNIX', 'Linux', 'Windows', 'MacOS',
        'Embedded Hardware', 'Debugging', 'Unit Testing', 'Integration Testing', 'System Testing', 'Code Review', 'Git',
        'SVN', 'CI/CD', 'Software Documentation', 'IDE', 'CASE Tools', 'Computational Complexity', 'Algorithm Design',
        'Data Structures', 'Mathematical Modeling', 'Statistics', 'Technical Writing', 'Technical Support', 'System Design',
        'System Development', 'Technical Guidance', 'Client Interface', 'Vendor Interface', 'Emerging Technologies', 'Jira',
        'Trello', 'Software Architecture', 'Word', 'Excel'
    ]

    for title in titles:
        exist_hardskill = session.query(Hard_skills).filter(Hard_skills.Title == title).first()

        if not exist_hardskill:
            hard_skills_object = Hard_skills(Title=title)
            session.add(hard_skills_object)
            session.commit()