# Copyright 2022 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
"""pw_ide configuration."""

import os
from pathlib import Path
from typing import Any, Dict, List, Optional, Union

from pw_console.yaml_config_loader_mixin import YamlConfigLoaderMixin

PW_IDE_DIR_NAME = '.pw_ide'

_PW_IDE_DEFAULT_DIR = Path(
    os.path.expandvars('$PW_PROJECT_ROOT')) / PW_IDE_DIR_NAME

_DEFAULT_CONFIG = {
    'targets': [],
    'working_dir': _PW_IDE_DEFAULT_DIR,
}

_DEFAULT_PROJECT_FILE = Path('$PW_PROJECT_ROOT/.pw_ide.yaml')
_DEFAULT_PROJECT_USER_FILE = Path('$PW_PROJECT_ROOT/.pw_ide.user.yaml')
_DEFAULT_USER_FILE = Path('$HOME/.pw_ide.yaml')


class IdeSettings(YamlConfigLoaderMixin):
    """Pigweed IDE features settings storage class."""
    def __init__(
        self,
        project_file: Union[Path, bool] = _DEFAULT_PROJECT_FILE,
        project_user_file: Union[Path, bool] = _DEFAULT_PROJECT_USER_FILE,
        user_file: Union[Path, bool] = _DEFAULT_USER_FILE,
        default_config: Optional[Dict[str, Any]] = None,
    ) -> None:
        self.config_init(
            config_section_title='pw_ide',
            project_file=project_file,
            project_user_file=project_user_file,
            user_file=user_file,
            default_config=_DEFAULT_CONFIG
            if default_config is None else default_config,
            environment_var='PW_IDE_CONFIG_FILE',
        )

    @property
    def working_dir(self) -> Path:
        """Path to the pw_ide working directory.

        This should not be a directory that's regularly deleted or manipulated
        by other processes (e.g. the GN `out` directory) nor should it be
        committed to the code repo.
        """
        return Path(self._config.get('working_dir', ''))

    @property
    def targets(self) -> List[str]:
        """The list of targets that should be made available for code analysis.

        In this case, "target" is analogous to a GN target, i.e., a particular
        build configuration. Targets defined here will be used when processing
        a compilation database.
        """
        return self._config.get('targets', list())