from flask import Flask
from flask_sqlalchemy import SQLAlchemy
import tomllib
import os

db = SQLAlchemy()


def create_app(config_path=None):
    app = Flask(__name__, instance_relative_config=True)

    os.makedirs(app.instance_path, exist_ok=True)

    app.config["SQLALCHEMY_DATABASE_URI"] = f"sqlite:///{os.path.join(app.instance_path, 'worklog.db')}"
    app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
    app.config["SECRET_KEY"] = os.environ.get("SECRET_KEY", "dev-secret-change-in-prod")

    # Load TOML config
    if config_path is None:
        config_path = os.path.join(os.path.dirname(app.root_path), "config.toml")
    if os.path.exists(config_path):
        with open(config_path, "rb") as f:
            app.config["TOML"] = tomllib.load(f)
    else:
        app.config["TOML"] = {}

    db.init_app(app)

    from app.routes.dashboard import bp as dashboard_bp
    from app.routes.entries import bp as entries_bp
    from app.routes.reports import bp as reports_bp
    app.register_blueprint(dashboard_bp)
    app.register_blueprint(entries_bp)
    app.register_blueprint(reports_bp)

    with app.app_context():
        db.create_all()

    return app