import copy
import re

import core.config
from core.colors import red, good, green, end
from core.config import xsschecker
from core.filterChecker import filterChecker
from core.generator import generator
from core.htmlParser import htmlParser
from core.requester import requester
from core.log import setup_logger

logger = setup_logger(__name__)


def crawl(scheme, host, main_url, form, blindXSS, blindPayload, headers, delay, timeout, encoding):
    if form:
        for each in form.values():
            url = each['action']
            if url:
                if url.startswith(main_url):
                    pass
                elif url.startswith('//') and url[2:].startswith(host):
                    url = scheme + '://' + url[2:]
                elif url.startswith('/'):
                    url = scheme + '://' + host + url
                elif re.match(r'\w', url[0]):
                    url = scheme + '://' + host + '/' + url
                if url not in core.config.globalVariables['checkedForms']:
                    core.config.globalVariables['checkedForms'][url] = []
                method = each['method']
                GET = True if method == 'get' else False
                inputs = each['inputs']
                paramData = {}
                for one in inputs:
                    paramData[one['name']] = one['value']
                    for paramName in paramData.keys():
                        if paramName not in core.config.globalVariables['checkedForms'][url]:
                            core.config.globalVariables['checkedForms'][url].append(paramName)
                            paramsCopy = copy.deepcopy(paramData)
                            paramsCopy[paramName] = xsschecker
                            response = requester(
                                url, paramsCopy, headers, GET, delay, timeout)
                            parsedResponse = htmlParser(response, encoding)
                            occurences = parsedResponse[0]
                            positions = parsedResponse[1]
                            efficiencies = filterChecker(
                                url, paramsCopy, headers, GET, delay, occurences, timeout, encoding)
                            vectors = generator(occurences, response.text)
                            if vectors:
                                for confidence, vects in vectors.items():
                                    try:
                                        payload = list(vects)[0]
                                        logger.vuln('Vulnerable webpage: %s%s%s' %
                                                    (green, url, end))
                                        logger.vuln('Vector for %s%s%s: %s' %
                                                    (green, paramName, end, payload))
                                        break
                                    except IndexError:
                                        pass
                            if blindXSS and blindPayload:
                                paramsCopy[paramName] = blindPayload
                                requester(url, paramsCopy, headers,
                                          GET, delay, timeout)