import os

import yaml
import json

import urllib.request, urllib.error, urllib.parse

from lxml import etree
import lxml.html
import lxml.html.soupparser


class fdb_spider(object):
    def __init__(self, config_file):
        with open(config_file, "r") as stream:
            try:
                self.config = yaml.safe_load(stream)
            except yaml.YAMLError as exc:
                print(exc)

    # input list of funding databases in form of yaml file ['foerderinfo.bund.de', 'ausschreibungen.giz.de', .. , 'usw']

    def download_link_list_pages_of_funding_databases(self, list_of_fdbs):
        # download only html pages of the funding databases specified in input

        for fdb in list_of_fdbs:
            for key in self.config:
                if key in list_of_fdbs:
                    try:
                        entry_list = self.config.get(key).get("entry-list")
                    except Exception as e:
                        print(
                            "There is a problem with the configuration variable entryList in the config.yaml - the original error message is:",
                            e,
                        )
                    try:
                        entry_list_link = entry_list.get("link")
                    except Exception as e:
                        print(
                            "No entryListLink defined in config.yaml - the original error message is:",
                            e,
                        )

                    # download the html page of the List of entrys

                    response = urllib.request.urlopen(entry_list_link)
                    web_content = response.read().decode("UTF-8")

                    # save interim results to files

                    f = open("spiders/pages/" + key + "entryList.html", "w+")
                    f.write(webContent)
                    f.close

    def parse_entry_list_data2dictionary(self, list_of_fdbs):
        for fdb in list_of_fdbs:
            try:
                # use soupparser to handle broken html

                tree = lxml.html.soupparser.parse(
                    "spiders/pages/" + fdb + "entryList.html"
                )

                #                for e in tree.iter():
                #
                #                    print(e.tag)
                #
                #                 for e in tree.xpath('//html//body//form//table//tr//td//table//tr'):
                #
                #                     #print(etree.tostring(e).decode())

                dictionary_entry_list = {}

                fdb_conf = self.config.get(fdb)
                fdb_domain = fdb_conf.get("domain")
                fdb_conf_entry_list = fdb_conf.get("entryList")
                fdb_conf_entry_list_parent = fdb_conf_entry_list.get("parent")
                fdb_conf_entry_list_child_name = fdb_conf_entry_list.get("child-name")
                fdb_conf_entry_list_child_link = fdb_conf_entry_list.get("child-link")

                for n in range(len(tree.xpath(fdb_conf_entry_list_parent))):
                    name = tree.xpath(
                        fdb_conf_entry_list_parent
                        + "["
                        + str(n)
                        + "]"
                        + fdb_conf_entry_list_child_name
                    )
                    link = tree.xpath(
                        fdb_conf_entry_list_parent
                        + "["
                        + str(n)
                        + "]"
                        + fdb_conf_entry_list_child_link
                    )

                    if len(name) > 0:
                        dictionary_entry_list[n] = {}
                        dictionary_entry_list[n]["name"] = name[0]

                        if fdb_domain in link[0]:
                            dictionary_entry_list[n]["link"] = link[0]

                        if fdb_domain not in link[0]:
                            dictionary_entry_list[n]["link"] = fdb_domain + link[0]

            except Exception as e:
                print(
                    "parsing the html did not work. Possibly you first have to run download_link_list_pages_of_funding_databases(). The original error message is:",
                    e,
                )

            # save interim results to files

            f = open("spiders/output/" + fdb + "entryList.txt", "w+")
            f.write(str(dictionary_entry_list))
            f.close

    def download_entry_data_htmls(self, list_of_fdbs):
        for fdb in list_of_fdbs:
            f = open("spiders/output/" + fdb + "entryList.txt")
            text = f.read()

            dictionary_entry_list = eval(text)

            for entry_id in dictionary_entry_list:
                entry_link = dictionary_entry_list[entry_id]["link"]

                # download the html page of the entry

                response = urllib.request.urlopen(entry_link)
                web_content = response.read().decode("UTF-8")

                # save interim results to files

                file_name = "spiders/pages/" + fdb + "/" + str(entry_id) + ".html"

                os.makedirs(os.path.dirname(file_name), exist_ok=True)
                f = open(file_name, "w+")
                f.write(web_content)
                f.close

    def parse_entry_data2dictionary(self, list_of_fdbs):
        for fdb in list_of_fdbs:
            print("started to parse data of entry of " + fdb + " ..")

            f = open("spiders/output/" + fdb + "entryList.txt")
            text = f.read()

            dictionary_entry_list = eval(text)

            fdb_conf = self.config.get(fdb)
            fdb_domain = fdb_conf.get("domain")
            fdb_conf_entry = fdb_conf.get("entry")
            fdb_conf_entry_info1 = fdb_conf_entry.get("info-1")
            fdb_conf_entry_info1_parent = fdb_conf_entry_info1.get("parent")
            fdb_conf_entry_info1_child_1 = fdb_conf_entry_info1.get(
                "child-1"
            )

            for entry_id in dictionary_entry_list:
                print(
                    "started to parse data of entry with name "
                    + dictionary_entry_list[entry_id]["name"]
                    + " .."
                )

                file_name = "spiders/pages/" + fdb + "/" + str(entry_id) + ".html"

                tree = lxml.html.soupparser.parse(file_name)

                child_1 = tree.xpath(
                    fdb_conf_entry_info1_parent
                    + fdb_conf_entry_info1_child_1
                )

                print("oi", child_1)

                if len(child_1) > 0:
                    dictionary_entry_list[entry_id]["child_1"] = child_1[
                        0
                    ]

            f = open("spiders/output/" + fdb + "entryList.txt", "w+")
            f.write(str(dictionary_entry_list))
            f.close