import json
from numpy import sqrt

class Params():
    
    def __init__(self, path, file):
        
        
        config = self.json_load(path, file)
        
        for key, value in config.items():
            setattr(self, key, value)
            
        self.smin1t = self.smin1 - self.dblock / 2
        self.smin2t = self.smin2 - self.dblock / 2
        self.awork = self.umax / (self.l * self.m)
        self.fl = self.Fd * (1-self.kturn)
        self.flon = self.Fd * self.kturn
        self.Fprop = self.kprop * self.Fd
        self.Ftg = self.Fd * (1 - self.kprop)
        self.Fq = 3 * self.Fd / 2 - 1/2 * sqrt(self.Fd*self.Fd + 16  * self.Fd * self.Fprop - 8 * self.Fprop**2)

    def json_load(self, path : str, filename : str):

        with open("/".join([path, filename]), "r") as f:
            config = json.load(f)

        return config