# paperdoorknob: Print glowfic
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation, version 3.


import unittest
import io
import subprocess
import requests
import requests_cache
import paperdoorknob
from testing.fakeserver import FakeGlowficServer

TIMEOUT = 8


class TestFetch(unittest.TestCase):
    def setUp(self) -> None:
        self._server = self.enterContext(FakeGlowficServer())
        self._port = self._server.port()

    def testFetch(self) -> None:
        with requests.session() as s:
            paperdoorknob.fetch(f"http://localhost:{self._port}", s, TIMEOUT)
            self.assertEqual(self._server.request_count(), 1)
            paperdoorknob.fetch(f"http://localhost:{self._port}", s, TIMEOUT)
            self.assertEqual(self._server.request_count(), 2)

    def testFetchCaching(self) -> None:
        with requests_cache.CachedSession() as s:
            paperdoorknob.fetch(f"http://localhost:{self._port}", s, TIMEOUT)
            self.assertEqual(self._server.request_count(), 1)
            paperdoorknob.fetch(f"http://localhost:{self._port}", s, TIMEOUT)
            self.assertEqual(self._server.request_count(), 1)

    def testFetchPersistentCaching(self) -> None:
        with requests_cache.CachedSession() as s:
            paperdoorknob.fetch(f"http://localhost:{self._port}", s, TIMEOUT)
            self.assertEqual(self._server.request_count(), 1)
        with requests_cache.CachedSession() as s:
            paperdoorknob.fetch(f"http://localhost:{self._port}", s, TIMEOUT)
            self.assertEqual(self._server.request_count(), 1)

    def testReplies(self) -> None:
        with requests.session() as s:
            replies = paperdoorknob.replies(
                paperdoorknob.clean(
                    paperdoorknob.fetch(
                        f"http://localhost:{self._port}",
                        s,
                        TIMEOUT)))
            self.assertEqual([r.text.strip() for r in replies],
                             ["This is glowfic", "You sure?", "Pretty sure."])

    def testFetchErrors(self) -> None:
        with requests.session() as s:
            with self.assertRaises(requests.HTTPError):
                paperdoorknob.fetch(
                    f"http://localhost:{self._port}/not_found", s, TIMEOUT)
            with self.assertRaises(requests.HTTPError):
                paperdoorknob.fetch(
                    f"http://localhost:{self._port}/server_error", s, TIMEOUT)

    def testProcess(self) -> None:
        with requests.session() as s:
            buf = io.BytesIO()
            paperdoorknob.process(
                f"http://localhost:{self._port}",
                s,
                TIMEOUT,
                buf,
                'pandoc')
            self.assertEqual(buf.getvalue(), b'''\\documentclass{article}
\\begin{document}
This is glowfic
You \\emph{sure}?
Pretty sure.
\\end{document}
''')

    def testPDF(self) -> None:
        with requests.session() as s:
            with open("test.tex", 'wb') as out:
                paperdoorknob.process(
                    f"http://localhost:{self._port}", s, TIMEOUT, out, 'pandoc')
            subprocess.run(['pdflatex', 'test.tex'],
                           stdin=subprocess.DEVNULL, check=True)


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