import io
import json
import xml
import xml.etree.ElementTree

import pytest

from grobid_tei_xml import GrobidBiblio, GrobidDocument, parse_citations_xml, parse_document_xml
from grobid_tei_xml.types import *


def test_small_xml() -> None:

    with open('tests/files/small.xml', 'r') as f:
        tei_xml = f.read()

    doc = parse_document_xml(tei_xml)
    expected_body = """Introduction \nEverything starts somewhere, as somebody [1]  once said. \n\n In Depth \n Meat \nYou know, for kids. \n Potatos \nQED."""
    expected = GrobidDocument(
        grobid_version='0.5.1-SNAPSHOT',
        grobid_timestamp='2018-04-02T00:31+0000',
        language_code='en',
        header=GrobidBiblio(
            title="Dummy Example File",
            authors=[
                GrobidAuthor(full_name="Brewster Kahle",
                             given_name="Brewster",
                             surname="Kahle",
                             affiliation=GrobidAffiliation(
                                 department="Faculty ofAgricultrial Engineering",
                                 laboratory="Plant Physiology Laboratory",
                                 institution="Technion-Israel Institute of Technology",
                                 address=GrobidAddress(
                                     post_code="32000",
                                     settlement="Haifa",
                                     country="Israel",
                                 ),
                             )),
                GrobidAuthor(
                    full_name="J Doe",
                    given_name="J",
                    surname="Doe",
                ),
            ],
            journal="Dummy Example File. Journal of Fake News. pp. 1-2. ISSN 1234-5678",
            date="2000",
        ),
        abstract="Everything you ever wanted to know about nothing",
        body=expected_body,
        citations=[
            GrobidBiblio(
                index=0,
                id="b0",
                authors=[
                    GrobidAuthor(full_name="A Seaperson", given_name="A", surname="Seaperson")
                ],
                date="2001",
                journal="Letters in the Alphabet",
                title="Everything is Wonderful",
                volume="20",
                pages="1-11",
            ),
            GrobidBiblio(
                index=1,
                id="b1",
                authors=[],
                date="2011-03-28",
                journal="The Dictionary",
                title="All about Facts",
                volume="14",
            ),
        ],
    )

    assert doc == expected


def test_small_xml_legacy() -> None:

    with open('tests/files/small.xml', 'r') as f:
        tei_xml = f.read()
    with open('tests/files/small.json', 'r') as f:
        json_form = json.loads(f.read())

    d = parse_document_xml(tei_xml).to_legacy_dict()

    assert d == json_form


def test_invalid_xml() -> None:

    with pytest.raises(xml.etree.ElementTree.ParseError):
        parse_document_xml("this is not XML")
    with pytest.raises(xml.etree.ElementTree.ParseError):
        parse_citations_xml("this is not XML")
    with pytest.raises(ValueError):
        parse_document_xml("<xml></xml>")
    with pytest.raises(TypeError):
        parse_document_xml(123)  # type: ignore


def test_bytes() -> None:

    with open('tests/files/small.xml', 'rb') as f:
        tei_xml = f.read()

    parse_document_xml(tei_xml)
    parse_document_xml(io.BytesIO(tei_xml))  # type: ignore


def test_elementtree() -> None:

    with open('tests/files/small.xml', 'rb') as f:
        tei_xml = f.read()

    parse_document_xml(xml.etree.ElementTree.parse(io.BytesIO(tei_xml)))  # type: ignore


def test_example_grobid_tei_xml() -> None:

    with open("tests/files/example_grobid.tei.xml", "r") as f:
        blob = f.read()

    doc = parse_document_xml(blob)

    assert doc.header.title == \
        """Changes of patients' satisfaction with the health care services in Lithuanian Health Promoting Hospitals network"""

    ref = [c for c in doc.citations or [] if c.id == "b12"][0]
    assert ref.authors[0].full_name == "K Tasa"
    assert ref.authors[0].given_name == "K"
    assert ref.authors[0].surname == "Tasa"
    assert ref.journal == "Quality Management in Health Care"
    assert ref.title == "Using patient feedback for quality improvement"
    assert ref.date == "1996"
    assert ref.pages == "206-225"
    assert ref.volume == "8"
    assert ref.unstructured == \
        """Tasa K, Baker R, Murray M. Using patient feedback for qua- lity improvement. Quality Management in Health Care 1996;8:206-19."""


def test_single_citations_xml() -> None:
    citation_xml = """
<biblStruct >
    <analytic>
        <title level="a" type="main">Mesh migration following abdominal hernia repair: a comprehensive review</title>
        <author>
            <persName
                xmlns="http://www.tei-c.org/ns/1.0">
                <forename type="first">H</forename>
                <forename type="middle">B</forename>
                <surname>Cunningham</surname>
            </persName>
        </author>
        <author>
            <persName
                xmlns="http://www.tei-c.org/ns/1.0">
                <forename type="first">J</forename>
                <forename type="middle">J</forename>
                <surname>Weis</surname>
            </persName>
        </author>
        <author>
            <persName
                xmlns="http://www.tei-c.org/ns/1.0">
                <forename type="first">L</forename>
                <forename type="middle">R</forename>
                <surname>Taveras</surname>
            </persName>
        </author>
        <author>
            <persName
                xmlns="http://www.tei-c.org/ns/1.0">
                <forename type="first">S</forename>
                <surname>Huerta</surname>
            </persName>
        </author>
        <idno type="DOI">10.1007/s10029-019-01898-9</idno>
        <idno type="PMID">30701369</idno>
    </analytic>
    <monogr>
        <title level="j">Hernia</title>
        <imprint>
            <biblScope unit="volume">23</biblScope>
            <biblScope unit="issue">2</biblScope>
            <biblScope unit="page" from="235" to="243" />
            <date type="published" when="2019-01-30" />
        </imprint>
    </monogr>
</biblStruct>"""

    d = parse_citations_xml(citation_xml)[0]
    assert d.title == """Mesh migration following abdominal hernia repair: a comprehensive review"""
    assert d.authors[2].given_name == "L"
    assert d.authors[2].surname == "Taveras"
    assert d.authors[2].full_name == "L R Taveras"
    assert d.doi == "10.1007/s10029-019-01898-9"
    assert d.pmid == "30701369"
    assert d.date == "2019-01-30"
    assert d.pages == "235-243"
    assert d.volume == "23"
    assert d.issue == "2"
    assert d.journal == "Hernia"


def test_citation_list_xml() -> None:

    with open('tests/files/example_citation_list.xml', 'r') as f:
        tei_xml = f.read()

    citations = parse_citations_xml(tei_xml)
    assert len(citations) == 10
    assert citations[7].title == "Global Hunger Index: The Challenge of Hidden Hunger"