#!/usr/bin/env python3

import io  # for python 2
import json
import os
import sys
import unittest

# Allow direct execution
import os
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

import youtube_dl.InfoExtractors

HEADER = u'''#!/usr/bin/env python

# DO NOT EDIT THIS FILE BY HAND!
# It is auto-generated from tests.json and gentests.py.

import hashlib
import io
import os
import json
import unittest
import sys

# Allow direct execution
import os
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from youtube_dl.FileDownloader import FileDownloader
import youtube_dl.InfoExtractors

def _file_md5(fn):
    with open(fn, 'rb') as f:
        return hashlib.md5(f.read()).hexdigest()

def md5_for_file(filename, block_size=2**20):
    with open(filename) as f:
        md5 = hashlib.md5()
        while True:
            data = f.read(block_size)
            if not data:
                break
            md5.update(data)
            return md5.hexdigest()
_file_md5 = md5_for_file

class DownloadTest(unittest.TestCase):
    PARAMETERS_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "parameters.json")

    def setUp(self):
        # Clear old files
        self.tearDown()

        with io.open(self.PARAMETERS_FILE, encoding='utf-8') as pf:
            self.parameters = json.load(pf)
'''

FOOTER = u'''

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

DEF_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'tests.json')
TEST_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'test_download.py')

def gentests():
    with io.open(DEF_FILE, encoding='utf-8') as deff:
        defs = json.load(deff)
    with io.open(TEST_FILE, 'w', encoding='utf-8') as testf:
        testf.write(HEADER)
        spaces = ' ' * 4
        write = lambda l: testf.write(spaces + l + '\n')

        for d in defs:
            name = d['name']
            ie = getattr(youtube_dl.InfoExtractors, name + 'IE')
            testf.write('\n')
            if not ie._WORKING:
                write('@unittest.skip("IE marked as not _WORKING")')
            elif not d['file']:
                write('@unittest.skip("No output file specified")')
            elif 'skip' in d:
                write('@unittest.skip(' + repr(d['skip']) + ')')
            write('def test_' + name + '(self):')
            write('    ' + name + 'IE = youtube_dl.InfoExtractors.' + name + 'IE')
            write('    filename = ' + repr(d['file']))
            write('    fd = FileDownloader(self.parameters)')
            write('    fd.add_info_extractor(' + name + 'IE())')
            for ien in d.get('addIEs', []):
                write('    fd.add_info_extractor(youtube_dl.InfoExtractors.' + ien + 'IE())')
            write('    fd.download([' + repr(d['url']) + '])')
            write('    self.assertTrue(os.path.exists(filename))')
            if 'size' in d:
                write('    self.assertEqual(os.path.getsize(filename), ' + repr(d['size']) + ')')
            if 'md5' in d:
                write('    md5_for_file = _file_md5(filename)')
                write('    self.assertEqual(md5_for_file, ' + repr(d['md5']) + ')')

        testf.write('\n\n')
        write('def tearDown(self):')
        for d in defs:
            if d['file']:
                write('    if os.path.exists(' + repr(d['file']) + '):')
                write('        os.remove(' + repr(d['file']) + ')')
            else:
                write('    # No file specified for ' + d['name'])
        testf.write('\n')
        testf.write(FOOTER)

if __name__ == '__main__':
    gentests()