import requests
import json
import logging
from requests.structures import CaseInsensitiveDict
from pyexecplugins.pyexecplugins import PyExecPlugin

class Plugin(PyExecPlugin):
    name = "Http"

    taskdef = {
        "name" : "pyrest",
        "description" : "Execute an HTTP request with pyrest worker",
        "inputKeys" : ["url", "body", "contentType", "method", "accept", "headers", "connectionTimeout", "readTimeout"],
        "outputKeys" : ["body", "status", "reason", "headers"],
        "ownerEmail" : "m.lettere@gmail.com"
    }

    def __init__(self, data, config=None):
        super().__init__(data, config)
        self.method = data.get("method") or "get"
        self.url = data.get("url")
        self.headers = data.get("headers") or {}
        self.headers = CaseInsensitiveDict(self.headers)
        self.contenttype = self.headers.get("Content-Type")
        self.accept = self.headers.get("Accept")
        self.body = data.get("body")
        self.params = data.get("params")
        self.expect = data.get("expect")
        self.fail = data.get("fail")
        self.conntimeout = data.get("connection-timeout") or 5
        self.readtimeout = data.get("read-timeout") or 10
        self.notimeout = (data.get("no-timeout") in (True, "true", "True", "TRUE", 1, "1", "y", "Y", "yes", "YES")) or False

    def adaptMultipart(self, parts):
        req = {}
        for p in parts:
            part = parts[p]
            if(type(part) == str):
                req[p] = part
            elif (type(part) == list and len(part) > 0 and len(part) <= 2):
                if len(part) == 1:
                    req[p] = (p, part[0])
                elif len(part) == 2 and part[1].find("json"):
                    req[p] = (p, json.dumps(part[0]), part[1])
                else:
                    req[p] = (p, part[0], part[1])
            else:
                raise Exception("Unable to parse multipart request. For every key either single string or an array matching requests tuple format is expected. Got %s with length %d for key %s" % (type(part), len(part), p))
        return req

    def doRequest(self):
        logging.getLogger("pyexec").debug("%s - %s - %s - %s",self.method, self.url, self.contenttype, self.accept)
        if self.contenttype != None and self.contenttype.find("json") != -1:
            self.request = requests.Request(self.method, self.url, headers=self.headers, json = self.body)
        elif self.contenttype != None and self.contenttype.find("multipart/form-data") != -1:
            self.headers.pop("content-type")
            self.request = requests.Request(self.method, self.url, headers=self.headers, files = self.adaptMultipart(self.body))
        elif self.contenttype != None and self.contenttype.find("text") != -1:
            self.request = requests.Request(self.method, self.url, headers=self.headers, data = self.body.encode('utf-8'))
        else:
            self.request = requests.Request(self.method, self.url, headers=self.headers, data = self.body, params = self.params)

        self.request = self.request.prepare()
        if self.notimeout:
            timeout = None 
        else:
            timeout= (self.conntimeout, self.readtimeout)

        logging.getLogger("pyexec").info("%s url=%s body=%s conntimeout=%d readtimeout=%d",self.method, self.request.url,self.body,self.conntimeout,self.readtimeout) 
        self.response = requests.Session().send(self.request, timeout=timeout)
        return self.response
    
    def computeStatus(self):
        if self.fail == False:
            return "COMPLETED"
        elif self.expect == None: 
            return "COMPLETED" if self.response.ok else "FAILED"
        else:
            if type(self.expect) == list:
                return "COMPLETED" if (self.response.status_code in self.expect) else "FAILED"
            else:
                return "COMPLETED" if (self.response.status_code == self.expect) else "FAILED"

    def buildOutput(self, status):
        hdrs = {}
        for k in self.response.headers.keys(): hdrs[k] = self.response.headers[k]

        logging.getLogger("pyexec").info("Response: {} {}".format(self.response.status_code, self.response.reason))

        if hdrs.get("Content-Type") != None and hdrs["Content-Type"].find("json") != -1 or self.accept != None and self.accept.find("json") != -1:
            outbody = self.response.json() if len(self.response.content) != 0 else None
        else:
            outbody = self.response.text

        logging.getLogger("pyexec").debug("%s", outbody)
        if status == "FAILED":
            raise Exception("HTTP call failed with status {} ({}) - {}".format(self.response.status_code, self.response.reason, str(outbody)))
        return { 
            "body" : outbody, 
            "headers" : hdrs, 
            "status" : self.response.status_code,
            "reason" : self.response.reason
        }

    def execute(self):
        self.doRequest()
        status = self.computeStatus()
        return self.buildOutput(status)