"""Test that the "translated" javascript files to not contain template tags which need to be determined at "run time".

This is because the "translated" javascript files are compiled into the "static" directory.
They should only contain template tags that render static information.
"""

import os
import pathlib
import re
import sys

here = os.path.abspath(os.path.dirname(__file__))
template_dir = os.path.abspath(os.path.join(here, '..', 'InvenTree', 'templates'))

# We only care about the 'translated' files
js_i18n_dir = os.path.join(template_dir, 'js', 'translated')
js_dynamic_dir = os.path.join(template_dir, 'js', 'dynamic')

errors = 0

print('=================================')
print('Checking static javascript files:')
print('=================================')


def check_invalid_tag(data):
    """Check for invalid tags."""
    pattern = r'{%(\w+)'

    err_count = 0

    for idx, line in enumerate(data):
        results = re.findall(pattern, line)

        for result in results:
            err_count += 1

            print(f' - Error on line {idx+1}: %{{{result[0]}')

    return err_count


def check_prohibited_tags(data):
    """Check for prohibited tags."""
    allowed_tags = [
        'if',
        'elif',
        'else',
        'endif',
        'for',
        'endfor',
        'trans',
        'load',
        'include',
        'url',
    ]

    pattern = r'{% (\w+)\s'

    err_count = 0

    for idx, line in enumerate(data):
        for tag in re.findall(pattern, line):
            if tag not in allowed_tags:
                print(f" > Line {idx+1} contains prohibited template tag '{tag}'")
                err_count += 1

    return err_count


for filename in pathlib.Path(js_i18n_dir).rglob('*.js'):
    print(f"Checking file 'translated/{os.path.basename(filename)}':")

    with open(filename, 'r') as js_file:
        data = js_file.readlines()

    errors += check_invalid_tag(data)
    errors += check_prohibited_tags(data)

for filename in pathlib.Path(js_dynamic_dir).rglob('*.js'):
    print(f"Checking file 'dynamic/{os.path.basename(filename)}':")

    # Check that the 'dynamic' files do not contains any translated strings
    with open(filename, 'r') as js_file:
        data = js_file.readlines()

    invalid_tags = ['blocktrans', 'blocktranslate', 'trans', 'translate']

    err_count = 0

    for idx, line in enumerate(data):
        for tag in invalid_tags:
            tag = '{% ' + tag
            if tag in line:
                err_count += 1

                print(f" > Error on line {idx+1}: Prohibited tag '{tag}' found")


if errors > 0:
    print(f'Found {errors} incorrect template tags')

sys.exit(errors)