import os
import pathlib
from tempfile import SpooledTemporaryFile

import pytest
from pytest_mock import MockFixture

from test_unstructured.unit_utils import assert_round_trips_through_JSON, example_doc_path
from unstructured.chunking.title import chunk_by_title
from unstructured.documents.elements import ListItem, NarrativeText, PageBreak, Title
from unstructured.partition.ppt import partition_ppt
from unstructured.partition.utils.constants import UNSTRUCTURED_INCLUDE_DEBUG_METADATA

DIRECTORY = pathlib.Path(__file__).parent.resolve()
EXAMPLE_DOCS_DIRECTORY = os.path.join(DIRECTORY, "..", "..", "..", "example-docs")

EXPECTED_PPT_OUTPUT = [
    Title(text="Adding a Bullet Slide"),
    ListItem(text="Find the bullet slide layout"),
    ListItem(text="Use _TextFrame.text for first bullet"),
    ListItem(text="Use _TextFrame.add_paragraph() for subsequent bullets"),
    NarrativeText(text="Here is a lot of text!"),
    NarrativeText(text="Here is some text in a text box!"),
]


def test_partition_ppt_from_filename():
    elements = partition_ppt(example_doc_path("fake-power-point.ppt"))
    assert elements == EXPECTED_PPT_OUTPUT
    for element in elements:
        assert element.metadata.filename == "fake-power-point.ppt"
    if UNSTRUCTURED_INCLUDE_DEBUG_METADATA:
        assert {element.metadata.detection_origin for element in elements} == {"pptx"}


def test_partition_ppt_from_filename_with_metadata_filename():
    elements = partition_ppt(example_doc_path("fake-power-point.ppt"), metadata_filename="test")
    assert all(element.metadata.filename == "test" for element in elements)


def test_partition_ppt_raises_with_missing_file():
    with pytest.raises(ValueError):
        partition_ppt(example_doc_path("doesnt-exist.ppt"))


def test_partition_ppt_from_file():
    with open(example_doc_path("fake-power-point.ppt"), "rb") as f:
        elements = partition_ppt(file=f)
    assert elements == EXPECTED_PPT_OUTPUT
    for element in elements:
        assert element.metadata.filename is None


def test_partition_ppt_from_file_with_metadata_filename():
    with open(example_doc_path("fake-power-point.ppt"), "rb") as f:
        elements = partition_ppt(file=f, metadata_filename="test")
    assert elements == EXPECTED_PPT_OUTPUT
    for element in elements:
        assert element.metadata.filename == "test"


def test_partition_ppt_raises_with_both_specified():
    filename = example_doc_path("fake-power-point.ppt")
    with open(filename, "rb") as f, pytest.raises(ValueError):
        partition_ppt(filename=filename, file=f)


def test_partition_ppt_raises_when_neither_file_path_or_file_is_provided():
    with pytest.raises(ValueError):
        partition_ppt()


def test_partition_ppt_from_filename_exclude_metadata():
    filename = example_doc_path("fake-power-point.ppt")
    elements = partition_ppt(filename=filename, include_metadata=False)
    for i in range(len(elements)):
        assert elements[i].metadata.to_dict() == {}


def test_partition_ppt_from_file_exclude_metadata():
    filename = example_doc_path("fake-power-point.ppt")
    with open(filename, "rb") as f:
        elements = partition_ppt(file=f, include_metadata=False)
    for i in range(len(elements)):
        assert elements[i].metadata.to_dict() == {}


def test_partition_ppt_pulls_metadata_last_modified_from_disk_when_file_is_a_path(
    mocker: MockFixture,
):
    modified_date_on_disk = "2024-05-01T15:37:28"
    mocker.patch(
        "unstructured.partition.ppt.get_last_modified_date", return_value=modified_date_on_disk
    )

    elements = partition_ppt(example_doc_path("fake-power-point.ppt"))

    assert elements[0].metadata.last_modified == modified_date_on_disk


def test_partition_ppt_uses_value_in_arg_not_disk_when_metadata_last_modified_arg_provided(
    mocker: MockFixture,
):
    modified_date_on_disk = "2024-05-01T15:37:28"
    modified_date_in_arg = "2020-07-05T09:24:28"
    mocker.patch(
        "unstructured.partition.ppt.get_last_modified_date", return_value=modified_date_on_disk
    )

    elements = partition_ppt(
        example_doc_path("fake-power-point.ppt"), metadata_last_modified=modified_date_in_arg
    )

    assert elements[0].metadata.last_modified == modified_date_in_arg


def test_partition_ppt_suppresses_modified_date_from_file_by_default(mocker: MockFixture):
    mocker.patch(
        "unstructured.partition.ppt.get_last_modified_date_from_file",
        return_value="2029-07-05T09:24:28",
    )

    with open(example_doc_path("fake-power-point.ppt"), "rb") as f:
        elements = partition_ppt(file=f)

    assert elements[0].metadata.last_modified is None


def test_partition_ppt_pulls_modified_date_from_file_when_date_from_file_object_arg_is_True(
    mocker: MockFixture,
):
    modified_date_on_file = "2029-07-05T09:24:28"
    mocker.patch(
        "unstructured.partition.ppt.get_last_modified_date_from_file",
        return_value=modified_date_on_file,
    )

    with open(example_doc_path("fake-power-point.ppt"), "rb") as f:
        elements = partition_ppt(file=f, date_from_file_object=True)

    assert elements[0].metadata.last_modified == modified_date_on_file


def test_partition_ppt_from_file_with_custom_metadata_date(mocker: MockFixture):
    modified_date_on_file = "2029-07-05T09:24:28"
    modified_date_in_arg = "2020-07-05T09:24:28"

    mocker.patch(
        "unstructured.partition.ppt.get_last_modified_date_from_file",
        return_value=modified_date_on_file,
    )

    with open(example_doc_path("fake-power-point.ppt"), "rb") as f:
        elements = partition_ppt(file=f, metadata_last_modified=modified_date_in_arg)

    assert elements[0].metadata.last_modified == modified_date_in_arg


def test_partition_ppt_from_file_without_metadata_date():
    """Test partition_ppt() with file that are not possible to get last modified date"""
    with open(example_doc_path("fake-power-point.ppt"), "rb") as f:
        sf = SpooledTemporaryFile()
        sf.write(f.read())
        sf.seek(0)
        elements = partition_ppt(file=sf, date_from_file_object=True)

    assert elements[0].metadata.last_modified is None


def test_partition_ppt_with_json():
    elements = partition_ppt(example_doc_path("fake-power-point.ppt"))
    assert_round_trips_through_JSON(elements)


def test_add_chunking_strategy_by_title_on_partition_ppt():
    file_path = example_doc_path("fake-power-point.ppt")
    elements = partition_ppt(file_path)
    chunk_elements = partition_ppt(file_path, chunking_strategy="by_title")
    chunks = chunk_by_title(elements)
    assert chunk_elements != elements
    assert chunk_elements == chunks


def test_partition_ppt_params():
    """Integration test of params: languages, include_page_break, and include_slide_notes."""
    elements = partition_ppt(
        example_doc_path("language-docs/eng_spa_mult.ppt"),
        include_page_breaks=True,
        include_slide_notes=True,
    )
    assert elements[0].metadata.languages == ["eng"]
    assert any(isinstance(element, PageBreak) for element in elements)
    # The example doc contains a slide note with the text "This is a slide note."
    assert any(element.text == "This is a slide note." for element in elements)


def test_partition_ppt_respects_detect_language_per_element():
    elements = partition_ppt(
        example_doc_path("language-docs/eng_spa_mult.ppt"), detect_language_per_element=True
    )
    langs = [element.metadata.languages for element in elements]
    # languages other than English and Spanish are detected by this partitioner,
    # so this test is slightly different from the other partition tests
    langs = {element.metadata.languages[0] for element in elements if element.metadata.languages}
    assert "eng" in langs
    assert "spa" in langs