from os import listdir, mkdir
from os.path import join, isdir, isfile
from shutil import rmtree
from pytest import fixture, mark
from lxml.etree import parse
from tiramisu import Config

from rougail import template, load
from rougail.config import dtdfilename


template_dirs = 'tests/templates'
test_ok = listdir(template_dirs)
#test_ok = ['60extra_group']


@fixture(scope="module", params=test_ok)
def test_dir(request):
    return request.param


def find_files(dirname: str,
               root: list,
               files: set,
               ) -> None:
    for filename in listdir(dirname):
        abs_dirname = join(dirname, filename)
        root_file = root + [filename]
        if isdir(join(dirname, filename)):
            find_files(abs_dirname,
                       root_file,
                       files,
                       )
        else:
            files.add(join(*root_file))


@mark.asyncio
async def test_dictionary(test_dir):
    test_dir = join(template_dirs, test_dir)
    tmp_dir = join(test_dir, 'tmp')
    funcs_file = join(template_dirs, '../eosfunc/test.py')
    distrib_dir = join(test_dir, 'tmpl')
    if isdir(tmp_dir):
        rmtree(tmp_dir)
    mkdir(tmp_dir)
    dest_dir = join(test_dir, 'dest')
    if isdir(dest_dir):
        rmtree(dest_dir)
    mkdir(dest_dir)
    with open(join(test_dir, '00-base.xml')) as fileio:
        xmlroot = parse(fileio).getroot()
        optiondescription = load(xmlroot,
                                 dtdfilename,
                                 funcs_file)

    config = await Config(optiondescription)
    await config.property.read_only()
    await template.generate(config,
                            funcs_file,
                            distrib_dir,
                            tmp_dir,
                            dest_dir,
                            join(dest_dir, 'rougail.conf'))

    list_templates = set()
    if isdir(dest_dir):
        find_files(dest_dir,
                   [],
                   list_templates,
                   )
    list_results = set()
    if isdir(join(test_dir, 'result')):
        find_files(join(test_dir, 'result'),
                   [],
                   list_results,
                   )
    assert list_templates == list_results
    for result in list_results:
        template_file = join(dest_dir, result)
        if not isfile(template_file):
            raise Exception(f'{template_file} is not generated')
        with open(join(test_dir, 'result', result), 'r') as fh:
            result_file = fh.read()
        with open(template_file, 'r') as fh:
            generated_file = fh.read()
        assert result_file == generated_file
    rmtree(dest_dir)
    rmtree(tmp_dir)