import urllib3
#requests doesnt work as it lacks key password checking
import json


class orthancInterface:

    def init(self,fname):
        #fname is a file with configuration
        try:
            f=open(fname)
        except OSError as e:
            print("Confgiuration error: OS error({0}): {1}").format(e.errno, e.strerror)
            raise

        self.connectionConfig=json.load(f)
        
        self.http=urllib3.PoolManager()

        if 'SSL' in self.connectionConfig['orthanc']:
            sslConfig=self.connectionConfig['orthanc']['SSL']
            self.http = urllib3.PoolManager(\
                cert_file=sslConfig['user'],\
                cert_reqs='CERT_REQUIRED',\
                key_file=sslConfig['key'],\
                ca_certs=sslConfig['ca'])

    #password=self.connectionConfig['SSL']['keyPwd'],\ doesnt work until 1.25

    def getBasicAuth(self):
        user=self.connectionConfig['orthanc']['user']
        pwd=self.connectionConfig['orthanc']['password']
        return user+":"+pwd
        
        
    def getCoreURL(self):
        return self.connectionConfig['orthanc']['server']

    
    def get(self,url,binary=False):

        debug=False
        if debug:
            print("GET: {0}").format(url)
        headers=urllib3.util.make_headers(basic_auth=self.getBasicAuth())
        try:
            if not binary:
                return self.http.request('GET',url,headers=headers)
            else:
                return self.http.request('GET',url,headers=headers,preload_content=False)
        #f contains json as a return value
        except urllib3.exceptions.HTTPError as e:
            print(e)

    def post(self,url,dataType,data):

        #dataType is typically json or octet-stream
        debug=False
        headers=urllib3.util.make_headers(basic_auth=self.getBasicAuth())
        headers['Content-Type']="application/"+dataType#for files
        #add csrf;also sets self.cookie
        #headers["X-LABKEY-CSRF"]=self.getCSRF()
        #doesn't seem like orthanc is big on security
        #headers["Cookie"]=self.cookie

        try:
            return self.http.request('POST',url,headers=headers,body=data)
        #f contains json as a return value
        except urllib3.exceptions.HTTPError as e:
            print(e)

    def put(self,url,data):

        debug=False

        if debug:
            print("PUT: {}").format(url)

        headers=urllib3.util.make_headers(basic_auth=self.getBasicAuth())
        headers["Content-Type"]="application/octet-stream"
        #add csrf
        #headers["X-LABKEY-CSRF"]=self.getCSRF()
        #headers["Cookie"]=self.cookie

        try:
            return self.http.request('PUT',url,headers=headers,body=data)
        #f contains json as a return value
        except urllib3.exceptions.HTTPError as e:
            print(e)
     

    def delete(self,url):

        debug=False
        if debug:
            print("DELETE: {0}").format(url)
        
        headers=urllib3.util.make_headers(basic_auth=self.getBasicAuth())
        try:
            return self.http.request('DELETE',url,headers=headers)
        except urllib3.exceptions.HTTPError as e:
            print(e)
            return None