#import copy
import os
#import sys
#import base64
#import hashlib

import re
import docing
import filing
import lxml.etree as etree
from lxml.builder import ElementMaker

from nitpo import Nitpo
from sheets import Sheets
from inces import Inces

class Webenv(Nitpo):

    def __init__(self, do_verbose=False):
        """web class"""
        super().__init__()
        self.N = "{%s}" % self.const['ns']
        self.E = ElementMaker(nsmap={None: self.const['ns']})
        self.env = None
        self.sheets = Sheets()
        self.inces = Inces()
        self.do_verbose = do_verbose

    def prepare(self):
        """this is the stuff we prepare at start of server"""
        preps = {}
        preps['sheets'] = {}
        # # fixme: this loads the sheets in conf, but not the sheet
        # # defined in the empro directory
        #for sheet_name in self.conf['sheets']:
        #    # # fixMe: there should be a better way to say what sheets need
        #    # # to be loaded at the start of the web server
        #    if not sheet_name.startswith('terew'):
        #        continue
        for name in ('anpro', 'terew'):
            for part in ('head', 'html', 'text'):
                conc = f"{name}_{part}"
                preps['sheets'][conc] = self.sheets.return_sheet(conc)
        preps['sheets']['kolar'] = self.sheets.return_sheet('kolar')
        preps['sheets']['fecha'] = self.sheets.return_sheet('fecha')
        # # compiled regular expressions
        res = {}
        surid = r'[-_0-9a-zA-Z]{22}'
        res['surid'] = re.compile(surid)
        # # for called urls we have two acods, u and w
        res['called_url'] = re.compile(r'//[uw]/' + surid)
        # # for fetched urls
        res['fetched_url'] = re.compile(r'//a/.*')
        # # fixme: only for backward compatifility
        res['url'] = res['called_url']
        # # subscriptions: repcode / email
        # # the more restrictive regex for emad is used in mulsu.js
        re_emad = r"(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'"
        re_emad += r'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f'
        re_emad += r'\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-'
        re_emad += r'\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.'
        re_emad += r')+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:(2(5[0-'
        re_emad += r'5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\.){3}(?:'
        re_emad += r'(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a'
        re_emad += r'-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x'
        re_emad += r'21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])'
        re_request = r'//([^/]+)/' + '(' + re_emad + ')'
        # old: res['re'] = re.compile(r'//([^/]+)/([^@]+@[^@]+\.[^@]+)')
        res['re'] = re.compile(re_request)
        # # subscriptions: repcode / email / id, abandoned
        # res['rei'] = re.compile(r'//([^/]+)/([^@]+@[^@]+\.[^@]+)/([^ ]+)$')
        res['sub'] = res['called_url']
        if not self.has_conf('regex', 'reports'):
            raise Exception("I need Ф[regex][reports]")
        res['repcode'] = re.compile(self.conf['regex']['reports'])
        # res['main_param_name'] = re.compile(r'[A-Z_]+')
        preps['res'] = res
        # # event track by token
        preps['events'] = {}
        # # constants fixMe: may not be used
        # preps['const'] = {}
        # # maximum requests for a failed kisu to reload vakis
        preps['count_reload_vakis'] = {}
        # # read the locs used to run the inces filter used by emailer.py
        preps['locs'] = self.inces.read_locs()
        if not self.has_conf('files', 'vakis'):
            raise Exception("webenv needs a vakis file.")
        vakis_fufi = self.conf['files']['vakis']
        preps['vakis'] = {}
        if os.path.isfile(vakis_fufi):
            preps['vakis'] = filing.load(vakis_fufi)
        # preps['conf'] = self.read_config()
        preps['const'] = self.set_constants()
        preps['web_ele'] = self.E(self.N + 'web')
        return preps