#!/usr/bin/env python3
# Copyright 2021 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Checks that all TODOs refer to a valid bug"""

import sys
import os
# Ensure that this file can import from cobalt root even if run as a script.
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

import re
from tools import get_files

# Find the root directory of the cobalt core repository (One directory up from the tools/ directory)
cobalt_root = os.path.abspath(
    os.path.join(os.path.join(os.path.dirname(__file__), '..')))

VALID_FORMATS = 'TODO(fxbug.dev/12345): With a colon if a message is present'
SKIP_VALIDATION = [
     # TODO(fxbug.dev/93229): Remove statusor symlink files once StatusOr move is done.
    'src/lib/statusor/statusor.h',  # Symlink to file in src/public/lib/statusor/
    'src/lib/statusor/status_macros.h',  # Symlink to file in src/public/lib/statusor/
    'src/lib/statusor/statusor_internals.h',  # Symlink to file in src/public/lib/statusor/
    'src/public/lib/statusor/statusor.h',  # Copied from external source
    'src/pb/report_row.proto',  # Copied from external source
]

todo = re.compile(r'TODO\((.*)\)')
valid = re.compile(r'TODO\(((https?://)?(fxb)(ug.dev)?/\d+)\)(: .+|)')
deprecated = re.compile(r'TODO\((https?://fxbug.dev|fxb)/\d+\)')

BOLD = '\033[1m'
END = '\033[0m'
CYAN = '\033[36m'
RED = '\033[91m'
YELLOW = '\033[93m'


def main(should_error=True, strict=True):
  source_files = [
      os.path.relpath(f, cobalt_root) for f in get_files.files_to_lint(
          ('.h', '.cc', '.go', '.rs', '.py', '.proto', '.gn', '.gni'),
          only_directories=['src', 'keys', 'tools'],
          all_files=True)
  ]

  errors = 0
  for file in source_files:
    if file in SKIP_VALIDATION:
      continue
    with open(file, 'r') as f:
      for i, line in enumerate(f.readlines()):
        line = line.strip().replace('\t', ' ')
        if match := todo.search(line):
          if not valid.search(line):
            print(f'{file}:{i+1}')
            print(f'{CYAN}{line}{END}')
            print(
                f"{' ' * match.start(0)}^ {BOLD}{RED}ERROR: TODO must use the format {VALID_FORMATS}.{END}"
            )
            print()
            if should_error:
              errors += 1
          if deprecated.search(line):
            print(f'{file}:{i+1}')
            print(f'{CYAN}{line}{END}')
            print(
                f"{' ' * match.start(0)}^ {BOLD}{YELLOW}WARNING: Using deprecated TODO format. Please use {VALID_FORMATS}.{END}"
            )
            print()
            if strict:
              errors += 1

  return errors


if __name__ == '__main__':
  exit(main())