import pandas as pd
import numpy as np
import scipy.stats as ss

def filldata( 
    sumstats,
    to_fill=[],
    overwirte=False,
    verbose=True
    ):
    

    if verbose: print("Strat filling data using existing columns...")
    if verbose: print("  - Raw input columns: ",list(sumstats.columns))
# check dupication ##############################################################################################
    skip_cols=[]
    if verbose: print("  - Overwirte mode: ",overwirte)
    if overwirte is False:
        for i in to_fill:
            if i in sumstats.columns:
                to_fill.remove(i)
                skip_cols.append(i)
        if verbose: print("  - Skipping columns: ",skip_cols) 
    if verbose: print("Filling columns: ",to_fill)
        
# beta to or ####################################################################################################     
    if "OR" in to_fill:
        
        #get or
        if "BETA" in sumstats.columns:
            if verbose: print("  - Filling OR using BETA column...")
            sumstats["OR"]   = np.exp(sumstats["BETA"])
        
        # get confidence interval 95
        if ("BETA" in sumstats.columns) and ("SE" in sumstats.columns):
            if verbose: print("  - Filling OR_95L/OR_95U using BETA/SE columns...")
            sumstats["OR_95L"] = np.exp(sumstats["BETA"]-ss.norm.ppf(0.975)*sumstats["SE"])
            sumstats["OR_95U"] = np.exp(sumstats["BETA"]+ss.norm.ppf(0.975)*sumstats["SE"])
# or to beta #################################################################################################### 
    if "BETA" in to_fill:
        #get beta
        if "OR" in sumstats.columns:
            if verbose: print("  - Filling BETA value using OR column...")
            sumstats["BETA"]  = np.log(sumstats["OR"])
        # get se
        if ("OR" in sumstats.columns) and "OR_SE" in sumstats.columns:
            if verbose: print("  - Filling SE value using OR/OR_SE column...")
            sumstats["SE"] = np.log(sumstats["OR"]+sumstats["OR_SE"]) - np.log(sumstats["OR"])
        elif ("OR" in sumstats.columns) and ("OR_95U" in sumstats.columns): 
            tl,tu = ss.norm.interval(0.95,0)
            if verbose: print("  - Filling SE value using OR/OR_95U column...")
            sumstats["SE"]=(sumstats["OR_95U"] - sumstats["OR"])/tu
        elif ("OR" in sumstats.columns) and ("OR_95L" in sumstats.columns):
            tl,tu = ss.norm.interval(0.95,0)
            if verbose: print("  - Filling SE value using OR/OR_95L column...")
            sumstats["SE"]=(sumstats["OR_95L"] -  sumstats["OR"])/tl

# z/chi2 to p ##################################################################################################
    if "P" in to_fill:
        if "Z" in sumstats.columns:
            if verbose: print("  - Filling P value using Z column...")
            sumstats["P"] = ss.chisqprob(sumstats["Z"]**2,1)
        elif "CHISQ" in sumstats.columns:
            if verbose: print("  - Filling P value using CHISQ column...")
            sumstats["P"] = ss.chisqprob(sumstats["CHISQ"],1)
        elif "MLOG10P" in sumstats.columns:    
            if verbose: print("  - Filling P value using MLOG10P column...")
            sumstats["P"] = np.power(10,-sumstats["MLOG10P"])

# beta/se to z ##################################################################################################            
    if "Z" in to_fill:    
        if ("BETA" in sumstats.columns) and ("SE" in sumstats.columns):
            if verbose: print("  - Filling Z using BETA/SE column...")
            sumstats["Z"] = sumstats["BETA"]/sumstats["SE"]

# z/p to chisq ##################################################################################################             
    if "CHISQ" in to_fill:
        if "Z" in sumstats.columns:
            if verbose: print("  - Filling CHISQ using Z column...")
            sumstats["CHISQ"] = (sumstats["Z"])**2
        elif "P" in sumstats.columns:
            if verbose: print("  - Filling CHISQ using P column...")
            sumstats["CHISQ"] = ss.chi2.isf(sumstats["P"], 1)
            
# p to -log10(P)  ###############################################################################################
    if "MLOG10P" in to_fill:
        if verbose: print("  - Filling MLOG10P using P column...")
        sumstats["MLOG10P"] = -np.log10(sumstats["P"])
        
# ###################################################################################
    
    core_col = ["MARKERNAME","rsID","CHR","POS","EA","NEA","EAF","N","BETA","SE","Z","CHISQ","P","MLOG10P","INFO", "OR","OR_SE","OR_95L","OR_95U"]
    other=[]
    for i in sumstats.columns:
        if i not in core_col:
                other.append(i)
    order = core_col + other
    
    output_columns=[]
    for i in order:
        if i in sumstats.columns:
            output_columns.append(i)
    sumstats = sumstats.loc[:,output_columns]
    return sumstats
    