import unittest
import os
import subprocess
from shutil import copyfile
import pandas as pd
from pandas.util.testing import assert_frame_equal
from io import StringIO

# with / without pwr DONE
# with / without url encode DONE
# with / without collapse user DONE
# with output to sdtout DONE
# note that the persistence radius is 7 by default
# reading various file formats including
#        7z, gz, bz2, xml  DONE
# wikia and wikipedia data DONE
# malformed xmls DONE

class Test_Wikipedia(unittest.TestCase):
    def setUp(self):
        if not os.path.exists("test_output"):
            os.mkdir("test_output")

        self.wiki = 'ikwiki-20180301-pages-meta-history'
        self.wikiq_out_name =  self.wiki + ".tsv"
        self.test_output_dir = os.path.join(".", "test_output")
        self.call_output = os.path.join(self.test_output_dir, self.wikiq_out_name)

        self.infile = "{0}.xml.bz2".format(self.wiki)    
        self.base_call = "../wikiq {0} -o {1}"
        self.input_dir = "dumps"
        self.input_file = os.path.join(".", self.input_dir,self.infile)
        self.baseline_output_dir = "baseline_output"

    def test_WP_url_encode(self):
        test_filename =  "url-encode_" + self.wikiq_out_name
        test_file = os.path.join(self.test_output_dir, test_filename)
        if os.path.exists(test_file):
            os.remove(test_file)
        
        call = self.base_call.format(self.input_file, self.test_output_dir)
        call = call + " --url-encode"
        proc = subprocess.Popen(call,stdout=subprocess.PIPE,shell=True)
        proc.wait()

        copyfile(self.call_output, test_file)
        baseline_file = os.path.join(".", self.baseline_output_dir, test_filename)

        # as a test let's make sure that we get equal data frames
        test = pd.read_table(test_file)
        baseline = pd.read_table(baseline_file)
        assert_frame_equal(test,baseline)

    def test_WP_namespaces(self):
        print(os.path.abspath('.'))
        test_filename =  "namespaces_" + self.wikiq_out_name
        test_file = os.path.join(self.test_output_dir, test_filename)
        if os.path.exists(test_file):
            os.remove(test_file)
        
        call = self.base_call.format(self.input_file, self.test_output_dir)
        call = call + " -n 0 -n 1"
        print(call)
        proc = subprocess.Popen(call,stdout=subprocess.PIPE,shell=True)
        proc.wait()
        copyfile(self.call_output, test_file)
        baseline_file = os.path.join(os.path.abspath("."), self.baseline_output_dir, test_filename)

        # as a test let's make sure that we get equal data frames
        test = pd.read_table(test_file)
        num_wrong_ns = sum(~ test.namespace.isin({0,1}))
        self.assertEqual(num_wrong_ns, 0)
        baseline = pd.read_table(baseline_file)
        assert_frame_equal(test,baseline)

    def test_WP_revert_radius(self):
        print(os.path.abspath('.'))
        test_filename =  "revert_radius_" + self.wikiq_out_name
        test_file = os.path.join(self.test_output_dir, test_filename)
        if os.path.exists(test_file):
            os.remove(test_file)
        
        call = self.base_call.format(self.input_file, self.test_output_dir)
        call = call + " -n 0 -n 1 -rr 1"
        print(call)
        proc = subprocess.Popen(call,stdout=subprocess.PIPE,shell=True)
        proc.wait()
        copyfile(self.call_output, test_file)
        baseline_file = os.path.join(os.path.abspath("."), self.baseline_output_dir, test_filename)

        # as a test let's make sure that we get equal data frames
        test = pd.read_table(test_file)
        num_wrong_ns = sum(~ test.namespace.isin({0,1}))
        self.assertEqual(num_wrong_ns, 0)
        baseline = pd.read_table(baseline_file)
        assert_frame_equal(test,baseline)



class Test_Basic(unittest.TestCase):

    def setUp(self):
        if not os.path.exists("test_output"):
            os.mkdir("test_output")

        self.wiki = 'sailormoon'
        self.wikiq_out_name =  self.wiki + ".tsv"
        self.test_output_dir = os.path.join(".", "test_output")
        self.call_output = os.path.join(self.test_output_dir, self.wikiq_out_name)

        self.infile = "{0}.xml.7z".format(self.wiki)
        self.base_call = "../wikiq {0} -o {1}"
        self.input_dir = "dumps"
        self.input_file = os.path.join(".", self.input_dir,self.infile)
        self.baseline_output_dir = "baseline_output"

    def test_noargs(self):

        test_filename =  "noargs_" + self.wikiq_out_name
        test_file = os.path.join(self.test_output_dir, test_filename)
        if os.path.exists(test_file):
            os.remove(test_file)
        
        call = self.base_call.format(self.input_file, self.test_output_dir)
        proc = subprocess.Popen(call,stdout=subprocess.PIPE,shell=True)
        proc.wait()

        copyfile(self.call_output, test_file)

        baseline_file = os.path.join(".", self.baseline_output_dir, test_filename)

        test = pd.read_table(test_file)
        baseline = pd.read_table(baseline_file)
        assert_frame_equal(test,baseline)


    def test_collapse_user(self):
        test_filename =  "collapse-user_" + self.wikiq_out_name
        test_file = os.path.join(self.test_output_dir, test_filename)
        if os.path.exists(test_file):
            os.remove(test_file)
        
        call = self.base_call.format(self.input_file, self.test_output_dir)
        call = call + " --collapse-user"

        proc = subprocess.Popen(call,stdout=subprocess.PIPE,shell=True)
        proc.wait()

        copyfile(self.call_output, test_file)

        baseline_file = os.path.join(".", self.baseline_output_dir, test_filename)
        test = pd.read_table(test_file)
        baseline = pd.read_table(baseline_file)
        assert_frame_equal(test,baseline)

    def test_pwr_segment(self):
        test_filename =  "persistence_segment_" + self.wikiq_out_name
        test_file = os.path.join(self.test_output_dir, test_filename)
        if os.path.exists(test_file):
            os.remove(test_file)
        
        call = self.base_call.format(self.input_file, self.test_output_dir)
        call = call + " --persistence segment"
        proc = subprocess.Popen(call,stdout=subprocess.PIPE,shell=True)
        proc.wait()


        copyfile(self.call_output, test_file)

        baseline_file = os.path.join(".", self.baseline_output_dir, test_filename)

        test = pd.read_table(test_file)
        baseline = pd.read_table(baseline_file)
        assert_frame_equal(test,baseline)

    def test_pwr_legacy(self):
        test_filename =  "persistence_legacy_" + self.wikiq_out_name
        test_file = os.path.join(self.test_output_dir, test_filename)
        if os.path.exists(test_file):
            os.remove(test_file)
        
        call = self.base_call.format(self.input_file, self.test_output_dir)
        call = call + " --persistence legacy"
        proc = subprocess.Popen(call,stdout=subprocess.PIPE,shell=True)
        proc.wait()


        copyfile(self.call_output, test_file)

        baseline_file = os.path.join(".", self.baseline_output_dir, test_filename)

        test = pd.read_table(test_file)
        baseline = pd.read_table(baseline_file)
        assert_frame_equal(test,baseline)

    def test_pwr(self):
        test_filename =  "persistence_" + self.wikiq_out_name
        test_file = os.path.join(self.test_output_dir, test_filename)
        if os.path.exists(test_file): 
           os.remove(test_file)
        
        call = self.base_call.format(self.input_file, self.test_output_dir)
        call = call + " --persistence"
        proc = subprocess.Popen(call,stdout=subprocess.PIPE,shell=True)
        proc.wait()


        copyfile(self.call_output, test_file)

        baseline_file = os.path.join(".", self.baseline_output_dir, test_filename)

        test = pd.read_table(test_file)
        baseline = pd.read_table(baseline_file)
        assert_frame_equal(test,baseline)


    def test_url_encode(self):
        test_filename =  "url-encode_" + self.wikiq_out_name

        test_file = os.path.join(self.test_output_dir, test_filename)
        if os.path.exists(test_file):
            os.remove(test_file)
        
        call = self.base_call.format(self.input_file, self.test_output_dir)
        call = call + " --url-encode"
        proc = subprocess.Popen(call,stdout=subprocess.PIPE,shell=True)
        proc.wait()

        copyfile(self.call_output, test_file)
        baseline_file = os.path.join(".", self.baseline_output_dir, test_filename)
        test = pd.read_table(test_file)
        baseline = pd.read_table(baseline_file)
        assert_frame_equal(test,baseline)


class Test_Malformed(unittest.TestCase):
    def setUp(self):
        if not os.path.exists("test_output"):
            os.mkdir("test_output")

        self.wiki = 'twinpeaks'
        self.wikiq_out_name =  self.wiki + ".tsv"
        self.test_output_dir = os.path.join(".", "test_output")
        self.call_output = os.path.join(self.test_output_dir, self.wikiq_out_name)

        self.infile = "{0}.xml.7z".format(self.wiki)
        self.base_call = "../wikiq {0} -o {1}"
        self.input_dir = "dumps"
        self.input_file = os.path.join(".", self.input_dir,self.infile)


    def test_malformed_noargs(self):

        call = self.base_call.format(self.input_file, self.test_output_dir)
        proc = subprocess.Popen(call,stdout=subprocess.PIPE,stderr=subprocess.PIPE, shell=True)
        proc.wait()
        outs, errs = proc.communicate()
        errlines = str(errs).split("\\n")
        self.assertEqual(errlines[-2],'xml.etree.ElementTree.ParseError: no element found: line 1369, column 0')

class Test_Stdout(unittest.TestCase):

    def setUp(self):
        self.wiki = 'sailormoon'
        self.wikiq_out_name =  self.wiki + ".tsv"

        self.infile = "{0}.xml.7z".format(self.wiki)
        self.base_call = "../wikiq {0} --stdout"
        self.input_dir = "dumps"
        self.input_file = os.path.join(".", self.input_dir,self.infile)
        self.baseline_output_dir = "baseline_output"

    def test_noargs(self):

        call = self.base_call.format(self.input_file)
        proc = subprocess.run(call,stdout=subprocess.PIPE,shell=True)
        outs = proc.stdout.decode("utf8")

        test_file = "noargs_" + self.wikiq_out_name
        baseline_file = os.path.join(".", self.baseline_output_dir, test_file)
        print(baseline_file)
        test = pd.read_table(StringIO(outs))
        baseline = pd.read_table(baseline_file)
        assert_frame_equal(test,baseline)

class Test_Regex(unittest.TestCase):

    def setUp(self):
        self.wiki = 'regextest'
        self.wikiq_out_name = self.wiki + '.tsv'
        self.infile = "{0}.xml.bz2".format(self.wiki)

        self.input_dir = "dumps"
        self.input_file = os.path.join(".", self.input_dir,self.infile)

        if not os.path.exists("test_output"):
            os.mkdir("test_output")

        self.test_output_dir = os.path.join(".", "test_output")
        self.call_output = os.path.join(self.test_output_dir, self.wikiq_out_name)
        # we have two base calls, one for checking inputs and the other for checking outputs
        self.base_call = "../wikiq {0}"
        self.base_call_outs = "../wikiq {0} -o {1}"

        self.baseline_output_dir = "baseline_output"

        # sample inputs for checking that bad inputs get terminated / test_regex_inputs
        self.bad_inputs_list = [
            #label is missing            
            "-RP '\\b\\d+\\b'", 
            #number of reg and number of labels do not match 
            "-RP 'NPO V' -RP THE -RPl testlabel",
            #cp but rp label
            "-CP '(Tamil|Li)' -RPl testlabel",
            #regex is missing
            "-CPl testlabel",
            "-RP '\\b\\w{3}\\b' -RPl threeletters -CP '\\b\\w{3}\\b'"
        ]

        # sample inputs for checking the outcomes of good inputs / test_basic_regex
        self.good_inputs_list = [
            "-RP '\\b\\d{3}\\b' -RPl threedigits",
            "-RP 'TestCase' -RP 'page' -RPl testcases -RPl page_word",
            "-CP 'Chevalier' -CPl chev_com -RP 'welcome to Wikipedia' -RPl wiki_welcome -CP 'Warning' -CPl warning",
            "-CP 'WP:EVADE' -CPl wp_evade"         
        ]

        
        self.cap_inputs_list = [
            "-RP 'Li Chevalier' -RPl li_cheval -CP '(?P<letter>\\b[a-zA-Z]{3}\\b)|(?P<number>\\b\\d+\\b)|(?P<cat>\\bcat\\b)' -CPl three",
            "-CP '(?P<a>\\bTestCaseA\\b)|(?P<b>\\bTestCaseB\\b)|(?P<c>\\bTestCaseC\\b)|(?P<d>\\bTestCaseD\\b)' -CPl testcase -RP '(?P<npov>npov|NPOV)|(?P<neutral>neutral point of view)' -RPl npov"
        ]



    def test_regex_inputs(self):
        for input in self.bad_inputs_list:
            call = self.base_call.format(self.input_file)
            call = call + " --stdout " + input
            print(call)
            proc = subprocess.Popen(call,stdout=subprocess.PIPE,stderr=subprocess.PIPE,shell=True)
            stdout,stderr = proc.communicate()
            #print(proc.returncode)
            
            # we want to check that the bad inputs were caught and sys.exit is stopping the code
            print(stderr.decode("utf-8"))
            self.assertNotEqual(proc.returncode,0)

    def test_basic_regex(self):
        for i, input in enumerate(self.good_inputs_list):

            test_filename = "basic_{0}_{1}.tsv".format(self.wikiq_out_name[:-4], str(i))
            #print(test_filename)
            test_file = os.path.join(self.test_output_dir, test_filename)
            if os.path.exists(test_file):
                os.remove(test_file)

            call = self.base_call_outs.format(self.input_file, self.test_output_dir)
            call = call + " " + input
            print(call)

            proc = subprocess.Popen(call,stdout=subprocess.PIPE,stderr=subprocess.PIPE,shell=True)
            proc.wait()
            copyfile(self.call_output, test_file)

            test = pd.read_table(test_file)
            
            baseline_file = os.path.join(".", self.baseline_output_dir, test_filename)
            baseline = pd.read_table(baseline_file)
            assert_frame_equal(test, baseline)
            print(i)


    def test_capturegroup_regex(self):
        for i, input in enumerate(self.cap_inputs_list):
            test_filename = "capturegroup_{0}_{1}.tsv".format(self.wikiq_out_name[:-4], str(i))
            print(test_filename)
            test_file = os.path.join(self.test_output_dir, test_filename)
            if os.path.exists(test_file):
                os.remove(test_file)

            call = self.base_call_outs.format(self.input_file, self.test_output_dir)
            call = call + " " + input
            print(call)

            proc = subprocess.Popen(call,stdout=subprocess.PIPE,stderr=subprocess.PIPE,shell=True)
            proc.wait()

            copyfile(self.call_output, test_file)
            
            test = pd.read_table(test_file)
            
            baseline_file = os.path.join(".", self.baseline_output_dir, test_filename)
            baseline = pd.read_table(baseline_file)
            assert_frame_equal(test, baseline)


if __name__ == '__main__':
    unittest.main()