# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.

"""
TODO(T132414938) Add a module-level docstring
"""


import argparse
import logging
import pathlib
import re
from logging import Logger
from pathlib import Path
from typing import Sequence

from pyre_extensions import override

from ..commands.command import Command
from ..configuration import Configuration
from ..errors import Errors
from ..filesystem import path_exists
from ..repository import Repository


LOG: Logger = logging.getLogger(__name__)


class MissingOverrideReturnAnnotations(Command):
    def __init__(self, *, repository: Repository, only_fix_error_code: int) -> None:
        super().__init__(repository)
        self._only_fix_error_code: int = only_fix_error_code

    @staticmethod
    def from_arguments(
        arguments: argparse.Namespace, repository: Repository
    ) -> "MissingOverrideReturnAnnotations":
        return MissingOverrideReturnAnnotations(
            repository=repository, only_fix_error_code=arguments.only_fix_error_code
        )

    @classmethod
    def add_arguments(cls, parser: argparse.ArgumentParser) -> None:
        super(MissingOverrideReturnAnnotations, cls).add_arguments(parser)
        parser.set_defaults(command=cls.from_arguments)
        parser.add_argument(
            "--only-fix-error-code",
            type=int,
            help="Only add fixmes for errors with this specific error code.",
            default=None,
        )

    @override
    def run(self) -> None:
        errors = Errors.from_stdin(self._only_fix_error_code)
        # pyre-fixme[16]: `List` has no attribute `paths_to_errors`.
        for path, errors in errors.paths_to_errors.items():
            LOG.info("Patching errors in `%s`.", path)
            errors = sorted(errors, key=lambda error: error["line"], reverse=True)

            path = pathlib.Path(path)
            lines = path.read_text().split("\n")

            for error in errors:
                if error["code"] != 15:
                    continue
                line = error["line"] - 1

                match = re.match(r".*`(.*)`\.", error["description"])
                if not match:
                    continue
                annotation = match.groups()[0]

                # Find last closing parenthesis in after line.
                LOG.info("Looking at %d: %s", line, lines[line])
                while True:
                    if "):" in lines[line]:
                        lines[line] = lines[line].replace("):", ") -> %s:" % annotation)
                        LOG.info("%d: %s", line, lines[line])
                        break
                    else:
                        line = line + 1

            LOG.warn("Writing patched %s", str(path))
            path.write_text("\n".join(lines))


class MissingGlobalAnnotations(Command):
    def __init__(self, *, repository: Repository, only_fix_error_code: int) -> None:
        super().__init__(repository)
        self._only_fix_error_code: int = only_fix_error_code

    @staticmethod
    def from_arguments(
        arguments: argparse.Namespace, repository: Repository
    ) -> "MissingGlobalAnnotations":
        return MissingGlobalAnnotations(
            repository=repository, only_fix_error_code=arguments.only_fix_error_code
        )

    @classmethod
    def add_arguments(cls, parser: argparse.ArgumentParser) -> None:
        super(MissingGlobalAnnotations, cls).add_arguments(parser)
        parser.set_defaults(command=cls.from_arguments)
        parser.add_argument(
            "--only-fix-error-code",
            type=int,
            help="Only add fixmes for errors with this specific error code.",
            default=None,
        )

    @override
    def run(self) -> None:
        errors = Errors.from_stdin(self._only_fix_error_code)
        # pyre-fixme[16]: `List` has no attribute `paths_to_errors`.
        for path, errors in errors.paths_to_errors.items():
            LOG.info("Patching errors in `%s`", path)
            errors = sorted(errors, key=lambda error: error["line"], reverse=True)

            path = pathlib.Path(path)
            lines = path.read_text().split("\n")

            for error in errors:
                if error["code"] != 5:
                    continue

                line = error["line"] - 1
                match = re.match(r".*`.*`.*`(.*)`.*", error["description"])
                if not match:
                    continue
                annotation = match.groups()[0]

                LOG.info("Looking at %d: %s", line, lines[line])
                if " =" in lines[line]:
                    lines[line] = lines[line].replace(" =", ": %s =" % annotation)
                    LOG.info("%d: %s", line, lines[line])

            path.write_text("\n".join(lines))


class SetUseBuck1(Command):
    def __init__(self, *, local_roots: Sequence[Path], repository: Repository) -> None:
        super().__init__(repository)
        self._local_roots = local_roots

    @staticmethod
    def from_arguments(
        arguments: argparse.Namespace, repository: Repository
    ) -> "SetUseBuck1":
        return SetUseBuck1(local_roots=arguments.local_roots, repository=repository)

    @classmethod
    def add_arguments(cls, parser: argparse.ArgumentParser) -> None:
        super(SetUseBuck1, cls).add_arguments(parser)
        parser.set_defaults(command=cls.from_arguments)
        parser.add_argument(
            "local_roots",
            help="Paths to directory with local configuration",
            type=path_exists,
            nargs="*",
        )

    @override
    def run(self) -> None:
        for local_root in self._local_roots:
            configuration = Configuration(local_root / ".pyre_configuration.local")
            configuration.set_use_buck1_if_possible()
            configuration.write()
