import sys
sys.path.append('../group-1')
import math
import pandas as pd
import os
from scraper.top100_extractor import programming_crime_list
import numpy as np 
import random


pd.set_option('display.max_rows', 500)

def get_peg(ticker: str):
    
    current_ratios = pd.read_csv(f'Companies_Data/{ticker}_Data/{ticker}_current_ratios.csv', index_col=[0]) #Read current ratios .csv. Check if it exists
    
    current_ratios['asOfDate'] = pd.to_datetime(current_ratios['asOfDate']) #Convert Object to DateTime

    current_ratios = current_ratios.sort_values('asOfDate', ascending=False)  # Sorting per Date
    current_ratios = current_ratios.dropna()

    # Take first value (the last peg ratio)
    # If it does not exist, it returns 0
    try:
        if len(current_ratios['PegRatio']) > 0:
            peg_ratio = current_ratios['PegRatio'].iloc[:1]
        else:
            return 0.0
    except KeyError:
        return 0.0
    return peg_ratio.values[0]



def get_financial_health(ticker: str):
 
    balance_sheet = pd.read_csv(f'Companies_Data/{ticker}_Data/{ticker}_balance_sheet_4Y+4Q.csv', index_col=[0])  # Read balance sheet .csv

    balance_sheet['asOfDate'] = pd.to_datetime(balance_sheet['asOfDate'])  # Convert Object to DateTime

    balance_sheet = balance_sheet.sort_values('asOfDate', ascending=False) # Sorting per Date

    balance_sheet = balance_sheet.dropna()
    
    # Create financial health column
    try:
        balance_sheet['financial_health'] = balance_sheet['TotalDebt'] / balance_sheet['TotalAssets'] 
    except KeyError:
        return 2.0

    # Get financial health
    financial_health = balance_sheet['financial_health'].iloc[:1]

    return financial_health.values[0]



def estimated_growth(ticker: str):

    growth_estimated = pd.read_csv(f'Companies_Data/{ticker}_Data/{ticker}5YGrowthEstimates.csv', index_col=[0])['5Y Growth estimate'].values[0] # Read 5 years growth estimates
    
    return growth_estimated


def employees_over_time(ticker: str):

    employee_df = pd.read_csv(f'Companies_Data/{ticker}_Data/{ticker}meta_data.csv') #get df to retrieve employee number of the company

    employee_number = employee_df.at[0, 'number_employees'] 

    lst = [employee_number] #What does this loop do? --> you start from the actual value of employee number of the company and then create absolutely false values for 
                            # previous years, using uniform distribution subtraction with the number at i. This makes so that the trend, once you reverse the list, is 
                            # growing over the years with some random fluctuations (just like how the number of employees grows over time, it's not like y=x)

    for i in range(0, 11):

        lst.append(lst[i] + random.uniform(-0.2*lst[i], 0.1*lst[i]))  
    
    lst.reverse()
   
    return lst


def past_performance_earnings(ticker: str):

    earnings = pd.read_csv(f'Companies_Data/{ticker}_Data/{ticker}earnings.csv', index_col=[0]) # Read earnings csv
    
    performance_index = round((earnings['epsActual'].sum() - earnings['epsEstimate'].sum()) / earnings['epsEstimate'].sum() * 100, 2) #Performance 

    return performance_index



def normalizer():
    ''' Normalize the dataframe columns to a range between 0 and 200'''

    not_normalized = pd.read_csv('Elaborated_Data/Not_Normalized.csv') # Read Not_normalized .csv
    
    v_values = (200/(1+math.e**( 0.2*(-not_normalized['Valuation'].mean()+not_normalized['Valuation'])))) #VALUATION STAT
    not_normalized['Valuation'] = v_values

    fh_values= (80/not_normalized['Financial Health'].mean())*not_normalized['Financial Health'] #FINANCIAL HEALTH STAT
    not_normalized['Financial Health'] = fh_values 

    not_normalized['Estimated Growth'] = not_normalized['Estimated Growth'].str.strip("%").astype("float")
    eg_values= (200/(1+math.e**( 0.08*(not_normalized['Estimated Growth'].mean()-not_normalized['Estimated Growth'])))) #ESTIMATED GROWTH STAT
    for i in range(len(eg_values)):
        eg_values[i] = float(round(eg_values[i],2))
    not_normalized['Estimated Growth']= eg_values

    pf_values = (200/(1+math.e**( 0.08*(not_normalized['Past Performance'].mean()-not_normalized['Past Performance'])))) #PAST PERFORMANCE
    not_normalized['Past Performance'] = pf_values
    
    # Create normalized dataframe for main page
    not_normalized.to_csv(r'Elaborated_Data/normalized_data.csv')

def create_df(companies_list):
 
    d = {
        'Ticker': [],
        'Valuation' : [],
        'Financial Health': [],
        'Estimated Growth': [],
        'Past Performance': []
    }

    d_emp = {
        'Ticker': [],
        'Employees_over_time': []
    }

    for company in companies_list:
        d['Ticker'].append(company)
        d['Valuation'].append(get_peg(company))
        d['Financial Health'].append(get_financial_health(company))
        d['Estimated Growth'].append(estimated_growth(company))
        d['Past Performance'].append(past_performance_earnings(company))
        d_emp['Ticker'].append(company)
        d_emp['Employees_over_time'].append(employees_over_time(company))
    
    df = pd.DataFrame(data=d)
    df.to_csv("Elaborated_Data/Not_Normalized.csv")

    df_employees = pd.DataFrame(data=d_emp)
    df_employees.to_csv(r"Elaborated_Data/employees_over_time.csv")



def main():

    if not os.path.exists(r"Elaborated_Data"):
        os.mkdir(r"Elaborated_Data")

    create_df(programming_crime_list)
    normalizer()

if __name__ == '__main__':
    main()