# coding=utf-8

from __future__ import unicode_literals

import base64
import io
import shutil
import os

import tempman

from .testing import assert_equal, generate_test_path

import mammoth
from mammoth import results


def test_docx_containing_one_paragraph_is_converted_to_single_p_element():
    with open(generate_test_path("single-paragraph.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal("<p>Walking on imported air</p>", result.value)
        assert_equal([], result.messages)


def test_can_read_xml_files_with_utf8_bom():
    with open(generate_test_path("utf8-bom.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal("<p>This XML has a byte order mark.</p>", result.value)
        assert_equal([], result.messages)


def test_empty_paragraphs_are_ignored_by_default():
    with open(generate_test_path("empty.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal("", result.value)
        assert_equal([], result.messages)


def test_empty_paragraphs_are_preserved_if_ignore_empty_paragraphs_is_false():
    with open(generate_test_path("empty.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, ignore_empty_paragraphs=False)
        assert_equal("<p></p>", result.value)
        assert_equal([], result.messages)


def test_embedded_style_map_is_used_if_present():
    with open(generate_test_path("embedded-style-map.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal("<h1>Walking on imported air</h1>", result.value)
        assert_equal([], result.messages)


def test_explicit_style_map_takes_precedence_over_embedded_style_map():
    with open(generate_test_path("embedded-style-map.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, style_map="p => p")
        assert_equal("<p>Walking on imported air</p>", result.value)
        assert_equal([], result.messages)


def test_explicit_style_map_is_combined_with_embedded_style_map():
    with open(generate_test_path("embedded-style-map.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, style_map="r => strong")
        assert_equal("<h1><strong>Walking on imported air</strong></h1>", result.value)
        assert_equal([], result.messages)


def test_embedded_style_maps_can_be_disabled():
    with open(generate_test_path("embedded-style-map.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, include_embedded_style_map=False)
        assert_equal("<p>Walking on imported air</p>", result.value)
        assert_equal([], result.messages)


def test_embedded_style_map_can_be_written_and_then_read():
    with _copy_of_test_data("single-paragraph.docx") as fileobj:
        mammoth.embed_style_map(fileobj, "p => h1")
        result = mammoth.convert_to_html(fileobj=fileobj, ignore_empty_paragraphs=False)
        assert_equal("<h1>Walking on imported air</h1>", result.value)
        assert_equal([], result.messages)


def test_embedded_style_map_can_be_retrieved():
    with _copy_of_test_data("single-paragraph.docx") as fileobj:
        mammoth.embed_style_map(fileobj, "p => h1")
        assert_equal("p => h1", mammoth.read_embedded_style_map(fileobj))


def test_warning_if_style_mapping_is_not_understood():
    style_map = """
!!!!
p => h1"""
    with open(generate_test_path("single-paragraph.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, style_map=style_map)
        assert_equal("<h1>Walking on imported air</h1>", result.value)
        warning = "Did not understand this style mapping, so ignored it: !!!!"
        assert_equal([results.warning(warning)], result.messages)


def test_inline_images_referenced_by_path_relative_to_part_are_included_in_output():
    with open(generate_test_path("tiny-picture.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal("""<p><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAIAAAACUFjqAAAAAXNSR0IArs4c6QAAAAlwSFlzAAAOvgAADr4B6kKxwAAAABNJREFUKFNj/M+ADzDhlWUYqdIAQSwBE8U+X40AAAAASUVORK5CYII=" /></p>""", result.value)
        assert_equal([], result.messages)


def test_inline_images_referenced_by_path_relative_to_base_are_included_in_output():
    with open(generate_test_path("tiny-picture-target-base-relative.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal("""<p><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAIAAAACUFjqAAAAAXNSR0IArs4c6QAAAAlwSFlzAAAOvgAADr4B6kKxwAAAABNJREFUKFNj/M+ADzDhlWUYqdIAQSwBE8U+X40AAAAASUVORK5CYII=" /></p>""", result.value)
        assert_equal([], result.messages)


def test_when_external_file_access_is_enabled_images_stored_outside_of_document_are_included_in_output():
    with open(generate_test_path("external-picture.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, external_file_access=True)
        assert_equal("""<p><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAIAAAACUFjqAAAAAXNSR0IArs4c6QAAAAlwSFlzAAAOvgAADr4B6kKxwAAAABNJREFUKFNj/M+ADzDhlWUYqdIAQSwBE8U+X40AAAAASUVORK5CYII=" /></p>""", result.value)
        assert_equal([], result.messages)


def test_when_external_file_access_is_enabled_warn_if_images_stored_outside_of_document_are_specified_when_passing_fileobj_without_name():
    fileobj = io.BytesIO()
    with open(generate_test_path("external-picture.docx"), "rb") as source_fileobj:
        shutil.copyfileobj(source_fileobj, fileobj)

    result = mammoth.convert_to_html(fileobj=fileobj, external_file_access=True)
    assert_equal("", result.value)
    assert_equal([results.warning("could not find external image 'tiny-picture.png', fileobj has no name")], result.messages)


def test_given_external_file_access_is_disabled_by_default_then_warn_if_images_stored_outside_of_document_are_specified():
    with open(generate_test_path("external-picture.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)

    assert_equal("", result.value)
    assert_equal([results.warning("could not open external image 'tiny-picture.png', external file access is disabled")], result.messages)


def test_when_external_file_access_is_enabled_warn_if_images_stored_outside_of_document_are_not_found():
    with tempman.create_temp_dir() as temp_dir:
        document_path = os.path.join(temp_dir.path, "document.docx")
        with open(document_path, "wb") as fileobj:
            with open(generate_test_path("external-picture.docx"), "rb") as source_fileobj:
                shutil.copyfileobj(source_fileobj, fileobj)

        with open(document_path, "rb") as fileobj:
            result = mammoth.convert_to_html(fileobj=fileobj, external_file_access=True)
            assert_equal("", result.value)
            expected_warning = "could not open external image: 'tiny-picture.png'"
            assert_equal("warning", result.messages[0].type)
            assert result.messages[0].message.startswith(expected_warning), "message was: " + result.messages[0].message
            assert_equal(1, len(result.messages))


def test_image_conversion_can_be_customised():
    @mammoth.images.img_element
    def convert_image(image):
        with image.open() as image_bytes:
            encoded_src = base64.b64encode(image_bytes.read()).decode("ascii")

        return {
            "src": encoded_src[:2] + "," + image.content_type
        }

    with open(generate_test_path("tiny-picture.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, convert_image=convert_image)
        assert_equal("""<p><img src="iV,image/png" /></p>""", result.value)
        assert_equal([], result.messages)


def test_simple_list_is_converted_to_list_elements():
    with open(generate_test_path("simple-list.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal([], result.messages)
        assert_equal("<ul><li>Apple</li><li>Banana</li></ul>", result.value)


def test_word_tables_are_converted_to_html_tables():
    expected_html = ("<p>Above</p>" +
        "<table>" +
        "<tr><td><p>Top left</p></td><td><p>Top right</p></td></tr>" +
        "<tr><td><p>Bottom left</p></td><td><p>Bottom right</p></td></tr>" +
        "</table>" +
        "<p>Below</p>")


    with open(generate_test_path("tables.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal([], result.messages)
        assert_equal(expected_html, result.value)


def test_footnotes_are_appended_to_text():
    # TODO: don't duplicate footnotes with multiple references
    expected_html = ('<p>Ouch' +
        '<sup><a href="#doc-42-footnote-1" id="doc-42-footnote-ref-1">[1]</a></sup>.' +
        '<sup><a href="#doc-42-footnote-2" id="doc-42-footnote-ref-2">[2]</a></sup></p>' +
        '<ol><li id="doc-42-footnote-1"><p> A tachyon walks into a bar. <a href="#doc-42-footnote-ref-1">↑</a></p></li>' +
        '<li id="doc-42-footnote-2"><p> Fin. <a href="#doc-42-footnote-ref-2">↑</a></p></li></ol>')

    with open(generate_test_path("footnotes.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, id_prefix="doc-42-")
        assert_equal([], result.messages)
        assert_equal(expected_html, result.value)


def test_endnotes_are_appended_to_text():
    expected_html = ('<p>Ouch' +
        '<sup><a href="#doc-42-endnote-2" id="doc-42-endnote-ref-2">[1]</a></sup>.' +
        '<sup><a href="#doc-42-endnote-3" id="doc-42-endnote-ref-3">[2]</a></sup></p>' +
        '<ol><li id="doc-42-endnote-2"><p> A tachyon walks into a bar. <a href="#doc-42-endnote-ref-2">↑</a></p></li>' +
        '<li id="doc-42-endnote-3"><p> Fin. <a href="#doc-42-endnote-ref-3">↑</a></p></li></ol>')

    with open(generate_test_path("endnotes.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, id_prefix="doc-42-")
        assert_equal([], result.messages)
        assert_equal(expected_html, result.value)


def test_relationships_are_handled_properly_in_footnotes():
    expected_html = (
        '<p><sup><a href="#doc-42-footnote-1" id="doc-42-footnote-ref-1">[1]</a></sup></p>' +
        '<ol><li id="doc-42-footnote-1"><p> <a href="http://www.example.com">Example</a> <a href="#doc-42-footnote-ref-1">↑</a></p></li></ol>')

    with open(generate_test_path("footnote-hyperlink.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, id_prefix="doc-42-")
        assert_equal([], result.messages)
        assert_equal(expected_html, result.value)


def test_when_style_mapping_is_defined_for_comment_references_then_comments_are_included():
    expected_html = (
        '<p>Ouch' +
        '<sup><a href="#doc-42-comment-0" id="doc-42-comment-ref-0">[MW1]</a></sup>.' +
        '<sup><a href="#doc-42-comment-2" id="doc-42-comment-ref-2">[MW2]</a></sup></p>' +
        '<dl><dt id="doc-42-comment-0">Comment [MW1]</dt><dd><p>A tachyon walks into a bar. <a href="#doc-42-comment-ref-0">↑</a></p></dd>' +
        '<dt id="doc-42-comment-2">Comment [MW2]</dt><dd><p>Fin. <a href="#doc-42-comment-ref-2">↑</a></p></dd></dl>'
    )

    with open(generate_test_path("comments.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, id_prefix="doc-42-", style_map="comment-reference => sup")
        assert_equal([], result.messages)
        assert_equal(expected_html, result.value)


def test_text_boxes_are_read():
    with open(generate_test_path("text-box.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal('<p>Datum plane</p>', result.value)


def test_underline_is_ignored_by_default():
    with open(generate_test_path("underline.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal('<p><strong>The Sunset Tree</strong></p>', result.value)


def test_underline_can_be_configured_with_style_mapping():
    with open(generate_test_path("underline.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, style_map="u => em")
        assert_equal('<p><strong>The <em>Sunset</em> Tree</strong></p>', result.value)


def test_strikethrough_is_converted_to_s_element_by_default():
    with open(generate_test_path("strikethrough.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal("<p><s>Today's Special: Salmon</s> Sold out</p>", result.value)


def test_strikethrough_conversion_can_be_configured_with_style_mapping():
    with open(generate_test_path("strikethrough.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, style_map="strike => del")
        assert_equal("<p><del>Today's Special: Salmon</del> Sold out</p>", result.value)


def test_transform_document_is_applied_to_document_before_conversion():
    def transform_document(document):
        document.children[0].style_id = "Heading1"
        return document

    with open(generate_test_path("single-paragraph.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, transform_document=transform_document)
        assert_equal("<h1>Walking on imported air</h1>", result.value)
        assert_equal([], result.messages)


def test_paragraph_transform_only_transforms_paragraphs():
    def transform_paragraph(paragraph):
        return paragraph.copy(style_id="Heading1")
    transform_document = mammoth.transforms.paragraph(transform_paragraph)
    with open(generate_test_path("single-paragraph.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj, transform_document=transform_document)
        assert_equal("<h1>Walking on imported air</h1>", result.value)
        assert_equal([], result.messages)


def test_docx_containing_one_paragraph_can_be_converted_to_markdown():
    with open(generate_test_path("single-paragraph.docx"), "rb") as fileobj:
        result = mammoth.convert_to_markdown(fileobj=fileobj)
        assert_equal("Walking on imported air\n\n", result.value)
        assert_equal([], result.messages)


def test_can_extract_raw_text():
    with open(generate_test_path("simple-list.docx"), "rb") as fileobj:
        result = mammoth.extract_raw_text(fileobj=fileobj)
        assert_equal([], result.messages)
        assert_equal("Apple\n\nBanana\n\n", result.value)


def test_can_read_strict_format():
    with open(generate_test_path("strict-format.docx"), "rb") as fileobj:
        result = mammoth.convert_to_html(fileobj=fileobj)
        assert_equal([], result.messages)
        assert_equal("<p>Test</p>", result.value)


def _copy_of_test_data(path):
    destination = io.BytesIO()
    with open(generate_test_path(path), "rb") as source:
        shutil.copyfileobj(source, destination)
    return destination