# encoding: utf-8

# This file is part of CycloneDX Python Lib
#
# 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.
#
# SPDX-License-Identifier: Apache-2.0
# Copyright (c) OWASP Foundation. All Rights Reserved.

from typing import Optional
from xml.etree import ElementTree

from ..exception.output import BomGenerationErrorException
from ..model.bom import Bom
from ..schema import SchemaVersion
from ..schema.schema import (
    SCHEMA_VERSIONS,
    BaseSchemaVersion,
    SchemaVersion1Dot0,
    SchemaVersion1Dot1,
    SchemaVersion1Dot2,
    SchemaVersion1Dot3,
    SchemaVersion1Dot4,
)
from . import BaseOutput


class Xml(BaseOutput, BaseSchemaVersion):
    XML_VERSION_DECLARATION: str = '<?xml version="1.0" encoding="UTF-8"?>'

    def __init__(self, bom: Bom) -> None:
        super().__init__(bom=bom)
        self._root_bom_element: Optional[ElementTree.Element] = None

    @property
    def schema_version(self) -> SchemaVersion:
        return self.schema_version_enum

    def generate(self, force_regeneration: bool = False) -> None:
        # New way
        _view = SCHEMA_VERSIONS.get(self.get_schema_version())
        if self.generated and force_regeneration:
            self.get_bom().validate()
            self._root_bom_element = self.get_bom().as_xml(  # type: ignore
                view_=_view, as_string=False, xmlns=self.get_target_namespace()
            )
            self.generated = True
            return
        elif self.generated:
            return
        else:
            self.get_bom().validate()
            self._root_bom_element = self.get_bom().as_xml(  # type: ignore
                view_=_view, as_string=False, xmlns=self.get_target_namespace()
            )
            self.generated = True
            return

    def output_as_string(self) -> str:
        self.generate()
        if self.generated and self._root_bom_element is not None:
            return str(Xml.XML_VERSION_DECLARATION + ElementTree.tostring(self._root_bom_element, encoding='unicode'))

        raise BomGenerationErrorException('There was no Root XML Element after BOM generation.')

    def get_target_namespace(self) -> str:
        return f'http://cyclonedx.org/schema/bom/{self.get_schema_version()}'


class XmlV1Dot0(Xml, SchemaVersion1Dot0):

    def _create_bom_element(self) -> ElementTree.Element:
        return ElementTree.Element('bom', {'xmlns': self.get_target_namespace(), 'version': '1'})


class XmlV1Dot1(Xml, SchemaVersion1Dot1):
    pass


class XmlV1Dot2(Xml, SchemaVersion1Dot2):
    pass


class XmlV1Dot3(Xml, SchemaVersion1Dot3):
    pass


class XmlV1Dot4(Xml, SchemaVersion1Dot4):
    pass