from flask import Flask, request,render_template, send_from_directory
from healthcareio.params import SYS_ARGS
import healthcareio.analytics
import os
import json
import time
# import smart
import transport
import pandas as pd
import numpy as np
from healthcareio import x12
from healthcareio.export import export
from multiprocessing import Process
# from flask_socketio import SocketIO, emit, disconnect,send
from healthcareio.server import proxy
PATH = os.sep.join([os.environ['HOME'],'.healthcareio','config.json'])
app = Flask(__name__)
# socket_ = SocketIO(app)

def resume (files):
    _args = SYS_ARGS['config']['store'].copy()
    if 'mongo' in SYS_ARGS['config']['store']['type'] :
        _args['type'] = 'mongo.MongoReader'
        reader = transport.factory.instance(**_args)
    _files = []
    try:
        pipeline = [{"$match":{"completed":{"$eq":True}}},{"$group":{"_id":"$name"}},{"$project":{"name":"$_id","_id":0}}]
        _args = {"aggregate":"logs","cursor":{},"allowDiskUse":True,"pipeline":pipeline}
        _files = reader.read(mongo = _args)
        _files = [item['name'] for item in _files]
    except Exception as e :
        pass
    
    return list(set(files) - set(_files))
        
    

def run ():
    #
    # let's get the files in the folder (perhaps recursively traverse them)
    #
    FILES = []
    BATCH = int(SYS_ARGS['config']['args']['batch']) #-- number of processes (poorly named variable)

    for root,_dir,f in os.walk(SYS_ARGS['config']['args']['folder']) :
        if f :
            FILES += [os.sep.join([root,name]) for name in f]
    FILES = resume(FILES)
    FILES = np.array_split(FILES,BATCH)
    procs = []
    for FILE_GROUP in FILES :
        
        FILE_GROUP = FILE_GROUP.tolist()
        # logger.write({"process":index,"parse":SYS_ARGS['parse'],"file_count":len(row)})
        # proc = Process(target=apply,args=(row,info['store'],_info,))
        parser = x12.Parser(PATH) #os.sep.join([PATH,'config.json']))
        parser.set.files(FILE_GROUP)
        parser.start()
        procs.append(parser)  
    SYS_ARGS['procs']  = procs
# @socket_.on('data',namespace='/stream')
def push() :
    _args = dict(SYS_ARGS['config']['store'].copy(),**{"type":"mongo.MongoReader"})
    reader = transport.factory.instance(**_args)
    pipeline = [{"$group":{"_id":"$parse","claims":{"$addToSet":"$name"}}},{"$project":{"_id":0,"type":"$_id","count":{"$size":"$claims"}}}]
    _args = {"aggregate":"logs","cursor":{},"allowDiskUse":True,"pipeline":pipeline}
    r = pd.DataFrame(reader.read(mongo=_args))
    r = healthcareio.analytics.Apex.apply({"chart":{"type":"donut","axis":{"x":"count","y":"type"}},"data":r})
    # emit("update",r,json=True)
    return r
# @socket_.on('connect')
# def client_connect(**r):
#     print ('Connection received')
#     print (r)
#     push()
#     pass
    
@app.route("/favicon.ico")
def _icon():
    return send_from_directory(os.path.join([app.root_path, 'static','img','logo.svg']),
                               'favicon.ico', mimetype='image/vnd.microsoft.icon')
@app.route("/")
def init():
    e = SYS_ARGS['engine']
    sections = {"remits":e.info['835'],"claims":e.info['837']}
    _args = {"sections":sections,"store":SYS_ARGS["config"]["store"],"owner":SYS_ARGS['config']['owner'],"args":SYS_ARGS["config"]["args"]}
    return render_template("index.html",**_args)
@app.route("/format/<id>/<index>",methods=['POST'])
def _format(id,index):
    
    e = SYS_ARGS['engine']
    key = '837' if id == 'claims' else '835'
    index = int(index)
    # p = e.info[key][index]
    p = e.filter(type=id,index=index)
   
    r = []
    for item in p['pipeline'] :
        _item= dict(item)       
        _item = dict(_item,**healthcareio.analytics.Apex.apply(item))
        del _item['data']
        if 'apex' in _item or 'html' in _item:
            r.append(_item)
        
        
    r = {"id":p['id'],"pipeline":r}  
    return json.dumps(r),200

@app.route("/get/<id>/<index>",methods=['GET'])
def get(id,index):
    e = SYS_ARGS['engine']
    key = '837' if id == 'claims' else '835'
    index = int(index)
    # p = e.info[key][index]
    p = e.filter(type=id,index=index)
    r = {}
    for item in p[0]['pipeline'] :
        
        _item= [dict(item)]
        
        # r[item['label']] = item['data'].to_dict(orient='record')
        r[item['label']] = item['data'].to_dict('record')
    return json.dumps(r),200

@app.route("/reset",methods=["POST"])
def reset():
    return "1",200
@app.route("/data",methods=['GET'])
def get_data ():
    """
    This function will return statistical data about the services i.e general statistics about what has/been processed
    """
    HEADER = {"Content-type":"application/json"}
    _args = SYS_ARGS['config']
    options = dict(proxy.get.files(_args),**proxy.get.processes(_args))
    return json.dumps(options),HEADER
@app.route("/log/<id>",methods=["POST","PUT","GET"])
def log(id) :
    HEADER = {"Content-Type":"application/json; charset=utf8"}
    if id == 'params' and request.method in ['PUT', 'POST']:
        info = request.json
        _args = {"batch":info['batch'] if 'batch' in info else 1,"resume":True}
        #
        # We should update the configuration 
        SYS_ARGS['config']['args'] = _args
        PATH = os.sep.join([os.environ['HOME'],'.healthcareio','config.json'])
        write = lambda content: (open(PATH,'w')).write(json.dumps(content))
        proc = Process(target=write,args=(SYS_ARGS['config'],))
        proc.start()
        return "1",HEADER
    pass
@app.route("/io/<id>",methods=['POST'])
def io_data(id):
    if id == 'params' :
        _args = request.json
        #
        # Expecting batch,folder as parameters
        _args = request.json
        _args['resume'] = True
        print (_args)
        #
        # We should update the configuration 
        SYS_ARGS['config']['args'] = _args
        # PATH = os.sep.join([os.environ['HOME'],'.healthcareio','config.json'])
        try:
            write = lambda content: (open(PATH,'w')).write(json.dumps(content))
            proc = Process(target=write,args=(SYS_ARGS['config'],))
            proc.start()
            # proc.join()
            return "1",200
        except Exception as e :
            return "0",403
            pass
    elif id == 'stop' :
        stop()
        pass
    elif id == 'run' :
        # run()
        _args = {"args":SYS_ARGS['config']['args'],"store":SYS_ARGS["config"]["store"]}
        proxy.run(_args)
        return "1",200
        pass
        
@app.route("/export")
def export_form():
    _args = {"context":SYS_ARGS['context']}
    return render_template("store.html",**_args)
@app.route("/export",methods=['POST','PUT'])
def apply_etl():
    _info = request.json
    m = {'s3':'s3.s3Writer','mongo':'mongo.MongoWriter'}
    if _info :
        dest_args = {'type':m[_info['type']],"args": _info['content'] }
        src_args = SYS_ARGS['config']['store']
        # print (_args)
        # writer = transport.factory.instance(**_args)
        proxy.publish(src_args,dest_args)
        return "1",405
        
    else:
        return "0",404
@app.route("/update")
def update():
    pass
    return "0",405
@app.route("/reload",methods=['POST'])
def reload():
    # e = SYS_ARGS['engine']
    # e.apply()
    PATH= SYS_ARGS['config'] if 'config' in SYS_ARGS else os.sep.join([os.environ['HOME'],'.healthcareio','config.json'])    
    e = healthcareio.analytics.engine(PATH)
    # e.apply()
    SYS_ARGS['engine'] = e

    return "1",200

    
if __name__ == '__main__' :
    PORT = int(SYS_ARGS['port']) if 'port' in SYS_ARGS else 5500
    DEBUG= int(SYS_ARGS['debug']) if 'debug' in SYS_ARGS else 0
    SYS_ARGS['context'] = SYS_ARGS['context'] if 'context' in SYS_ARGS else ''

    #
    # 
    PATH= SYS_ARGS['config'] if 'config' in SYS_ARGS else os.sep.join([os.environ['HOME'],'.healthcareio','config.json'])
    #
    # Adjusting configuration with parameters (batch,folder,resume)
    if 'args' not in SYS_ARGS['config'] :
        SYS_ARGS['config']["args"] = {"batch":1,"resume":True,"folder":"/data"}
    
    SYS_ARGS['procs'] = []
    
    
    # SYS_ARGS['path'] = os.sep.join([os.environ['HOME'],'.healthcareio','config.json'])
    e = healthcareio.analytics.engine(PATH)
    e.apply(type='claims',serialize=False)
    SYS_ARGS['engine'] = e
    app.run(host='0.0.0.0',port=PORT,debug=DEBUG,threaded=True)