"""Test suite for opc.oxml module."""

from docx.opc.constants import RELATIONSHIP_TARGET_MODE as RTM
from docx.opc.oxml import (
    CT_Default,
    CT_Override,
    CT_Relationship,
    CT_Relationships,
    CT_Types,
)
from docx.oxml.xmlchemy import serialize_for_reading

from .unitdata.rels import (
    a_Default,
    a_Relationship,
    a_Relationships,
    a_Types,
    an_Override,
)


class DescribeCT_Default:
    def it_provides_read_access_to_xml_values(self):
        default = a_Default().element
        assert default.extension == "xml"
        assert default.content_type == "application/xml"

    def it_can_construct_a_new_default_element(self):
        default = CT_Default.new("xml", "application/xml")
        expected_xml = a_Default().xml
        assert default.xml == expected_xml


class DescribeCT_Override:
    def it_provides_read_access_to_xml_values(self):
        override = an_Override().element
        assert override.partname == "/part/name.xml"
        assert override.content_type == "app/vnd.type"

    def it_can_construct_a_new_override_element(self):
        override = CT_Override.new("/part/name.xml", "app/vnd.type")
        expected_xml = an_Override().xml
        assert override.xml == expected_xml


class DescribeCT_Relationship:
    def it_provides_read_access_to_xml_values(self):
        rel = a_Relationship().element
        assert rel.rId == "rId9"
        assert rel.reltype == "ReLtYpE"
        assert rel.target_ref == "docProps/core.xml"
        assert rel.target_mode == RTM.INTERNAL

    def it_can_construct_from_attribute_values(self):
        cases = (
            ("rId9", "ReLtYpE", "foo/bar.xml", None),
            ("rId9", "ReLtYpE", "bar/foo.xml", RTM.INTERNAL),
            ("rId9", "ReLtYpE", "http://some/link", RTM.EXTERNAL),
        )
        for rId, reltype, target, target_mode in cases:
            if target_mode is None:
                rel = CT_Relationship.new(rId, reltype, target)
            else:
                rel = CT_Relationship.new(rId, reltype, target, target_mode)
            builder = a_Relationship().with_target(target)
            if target_mode == RTM.EXTERNAL:
                builder = builder.with_target_mode(RTM.EXTERNAL)
            expected_rel_xml = builder.xml
            assert rel.xml == expected_rel_xml


class DescribeCT_Relationships:
    def it_can_construct_a_new_relationships_element(self):
        rels = CT_Relationships.new()
        expected_xml = (
            '<Relationships xmlns="http://schemas.openxmlformats.org/package'
            '/2006/relationships"/>\n'
        )
        assert serialize_for_reading(rels) == expected_xml

    def it_can_build_rels_element_incrementally(self):
        # setup ------------------------
        rels = CT_Relationships.new()
        # exercise ---------------------
        rels.add_rel("rId1", "http://reltype1", "docProps/core.xml")
        rels.add_rel("rId2", "http://linktype", "http://some/link", True)
        rels.add_rel("rId3", "http://reltype2", "../slides/slide1.xml")
        # verify -----------------------
        expected_rels_xml = a_Relationships().xml
        assert serialize_for_reading(rels) == expected_rels_xml

    def it_can_generate_rels_file_xml(self):
        expected_xml = (
            "<?xml version='1.0' encoding='UTF-8' standalone='yes'?>\n"
            '<Relationships xmlns="http://schemas.openxmlformats.org/package'
            '/2006/relationships"/>'.encode("utf-8")
        )
        assert CT_Relationships.new().xml == expected_xml


class DescribeCT_Types:
    def it_provides_access_to_default_child_elements(self):
        types = a_Types().element
        assert len(types.defaults) == 2
        for default in types.defaults:
            assert isinstance(default, CT_Default)

    def it_provides_access_to_override_child_elements(self):
        types = a_Types().element
        assert len(types.overrides) == 3
        for override in types.overrides:
            assert isinstance(override, CT_Override)

    def it_should_have_empty_list_on_no_matching_elements(self):
        types = a_Types().empty().element
        assert types.defaults == []
        assert types.overrides == []

    def it_can_construct_a_new_types_element(self):
        types = CT_Types.new()
        expected_xml = a_Types().empty().xml
        assert types.xml == expected_xml

    def it_can_build_types_element_incrementally(self):
        types = CT_Types.new()
        types.add_default("xml", "application/xml")
        types.add_default("jpeg", "image/jpeg")
        types.add_override("/docProps/core.xml", "app/vnd.type1")
        types.add_override("/ppt/presentation.xml", "app/vnd.type2")
        types.add_override("/docProps/thumbnail.jpeg", "image/jpeg")
        expected_types_xml = a_Types().xml
        assert types.xml == expected_types_xml