# Copyright 2019 The Meson development team

# 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

#     http://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.
from __future__ import annotations

import abc
import re
import typing as T

if T.TYPE_CHECKING:
    from ..minit import Arguments


class SampleImpl(metaclass=abc.ABCMeta):

    def __init__(self, args: Arguments):
        self.name = args.name
        self.version = args.version
        self.lowercase_token = re.sub(r'[^a-z0-9]', '_', self.name.lower())
        self.uppercase_token = self.lowercase_token.upper()
        self.capitalized_token = self.lowercase_token.capitalize()

    @abc.abstractmethod
    def create_executable(self) -> None:
        pass

    @abc.abstractmethod
    def create_library(self) -> None:
        pass

    @abc.abstractproperty
    def exe_template(self) -> str:
        pass

    @abc.abstractproperty
    def exe_meson_template(self) -> str:
        pass

    @abc.abstractproperty
    def lib_template(self) -> str:
        pass

    @abc.abstractproperty
    def lib_test_template(self) -> str:
        pass

    @abc.abstractproperty
    def lib_meson_template(self) -> str:
        pass

    @abc.abstractproperty
    def source_ext(self) -> str:
        pass


class ClassImpl(SampleImpl):

    """For Class based languages, like Java and C#"""

    def create_executable(self) -> None:
        source_name = f'{self.capitalized_token}.{self.source_ext}'
        with open(source_name, 'w', encoding='utf-8') as f:
            f.write(self.exe_template.format(project_name=self.name,
                                             class_name=self.capitalized_token))
        with open('meson.build', 'w', encoding='utf-8') as f:
            f.write(self.exe_meson_template.format(project_name=self.name,
                                                   exe_name=self.name,
                                                   source_name=source_name,
                                                   version=self.version))

    def create_library(self) -> None:
        lib_name = f'{self.capitalized_token}.{self.source_ext}'
        test_name = f'{self.capitalized_token}_test.{self.source_ext}'
        kwargs = {'utoken': self.uppercase_token,
                  'ltoken': self.lowercase_token,
                  'class_test': f'{self.capitalized_token}_test',
                  'class_name': self.capitalized_token,
                  'source_file': lib_name,
                  'test_source_file': test_name,
                  'test_exe_name': f'{self.lowercase_token}_test',
                  'project_name': self.name,
                  'lib_name': self.lowercase_token,
                  'test_name': self.lowercase_token,
                  'version': self.version,
                  }
        with open(lib_name, 'w', encoding='utf-8') as f:
            f.write(self.lib_template.format(**kwargs))
        with open(test_name, 'w', encoding='utf-8') as f:
            f.write(self.lib_test_template.format(**kwargs))
        with open('meson.build', 'w', encoding='utf-8') as f:
            f.write(self.lib_meson_template.format(**kwargs))


class FileImpl(SampleImpl):

    """File based languages without headers"""

    def create_executable(self) -> None:
        source_name = f'{self.lowercase_token}.{self.source_ext}'
        with open(source_name, 'w', encoding='utf-8') as f:
            f.write(self.exe_template.format(project_name=self.name))
        with open('meson.build', 'w', encoding='utf-8') as f:
            f.write(self.exe_meson_template.format(project_name=self.name,
                                                   exe_name=self.name,
                                                   source_name=source_name,
                                                   version=self.version))

    def lib_kwargs(self) -> T.Dict[str, str]:
        """Get Language specific keyword arguments

        :return: A dictionary of key: values to fill in the templates
        """
        return {
            'utoken': self.uppercase_token,
            'ltoken': self.lowercase_token,
            'header_dir': self.lowercase_token,
            'class_name': self.capitalized_token,
            'function_name': f'{self.lowercase_token[0:3]}_func',
            'namespace': self.lowercase_token,
            'source_file': f'{self.lowercase_token}.{self.source_ext}',
            'test_source_file': f'{self.lowercase_token}_test.{self.source_ext}',
            'test_exe_name': f'{self.lowercase_token}_test',
            'project_name': self.name,
            'lib_name': self.lowercase_token,
            'test_name': self.lowercase_token,
            'version': self.version,
        }

    def create_library(self) -> None:
        lib_name = f'{self.lowercase_token}.{self.source_ext}'
        test_name = f'{self.lowercase_token}_test.{self.source_ext}'
        kwargs = self.lib_kwargs()
        with open(lib_name, 'w', encoding='utf-8') as f:
            f.write(self.lib_template.format(**kwargs))
        with open(test_name, 'w', encoding='utf-8') as f:
            f.write(self.lib_test_template.format(**kwargs))
        with open('meson.build', 'w', encoding='utf-8') as f:
            f.write(self.lib_meson_template.format(**kwargs))


class FileHeaderImpl(FileImpl):

    @abc.abstractproperty
    def header_ext(self) -> str:
        pass

    @abc.abstractproperty
    def lib_header_template(self) -> str:
        pass

    def lib_kwargs(self) -> T.Dict[str, str]:
        kwargs = super().lib_kwargs()
        kwargs['header_file'] = f'{self.lowercase_token}.{self.header_ext}'
        return kwargs

    def create_library(self) -> None:
        super().create_library()
        kwargs = self.lib_kwargs()
        with open(kwargs['header_file'], 'w', encoding='utf-8') as f:
            f.write(self.lib_header_template.format_map(kwargs))
