from io import BytesIO
from unittest.mock import call

import pytest
from flask import url_for
from notifications_python_client.errors import HTTPError

from app.s3_client.s3_logo_client import EMAIL_LOGO_LOCATION_STRUCTURE, TEMP_TAG
from tests.conftest import create_email_branding, normalize_spaces


def test_email_branding_page_shows_full_branding_list(
    client_request, platform_admin_user, mock_get_all_email_branding
):
    client_request.login(platform_admin_user)
    page = client_request.get(".email_branding")

    links = page.select(".message-name a")
    brand_names = [normalize_spaces(link.text) for link in links]
    hrefs = [link["href"] for link in links]

    assert normalize_spaces(page.select_one("h1").text) == "Email branding"

    assert page.select(".grid-col-9 a")[-1]["href"] == url_for(
        "main.create_email_branding"
    )

    assert brand_names == [
        "org 1",
        "org 2",
        "org 3",
        "org 4",
        "org 5",
    ]
    assert hrefs == [
        url_for(".update_email_branding", branding_id=1),
        url_for(".update_email_branding", branding_id=2),
        url_for(".update_email_branding", branding_id=3),
        url_for(".update_email_branding", branding_id=4),
        url_for(".update_email_branding", branding_id=5),
    ]


def test_edit_email_branding_shows_the_correct_branding_info(
    client_request, platform_admin_user, mock_get_email_branding, fake_uuid
):
    client_request.login(platform_admin_user)
    page = client_request.get(
        ".update_email_branding",
        branding_id=fake_uuid,
        _test_page_title=False,  # TODO: Fix page titles
    )

    assert page.select_one("#logo-img > img")["src"].endswith("/example.png")
    assert page.select_one("#name").attrs.get("value") == "Organization name"
    assert page.select_one("#file").attrs.get("accept") == ".png"
    assert page.select_one("#text").attrs.get("value") == "Organization text"
    assert page.select_one("#colour").attrs.get("value") == "#f00"


def test_create_email_branding_does_not_show_any_branding_info(
    client_request, platform_admin_user, mock_no_email_branding
):
    client_request.login(platform_admin_user)
    page = client_request.get(
        ".create_email_branding",
        _test_page_title=False,  # TODO: Fix page titles
    )

    assert page.select_one("#logo-img > img") is None
    assert page.select_one("#name").attrs.get("value") is None
    assert page.select_one("#file").attrs.get("accept") == ".png"
    assert page.select_one("#text").attrs.get("value") is None
    assert page.select_one("#colour").attrs.get("value") is None


def test_create_new_email_branding_without_logo(
    client_request,
    platform_admin_user,
    mocker,
    fake_uuid,
    mock_create_email_branding,
):
    data = {
        "logo": None,
        "colour": "#ff0000",
        "text": "new text",
        "name": "new name",
        "brand_type": "org",
    }

    mock_persist = mocker.patch("app.main.views.email_branding.persist_logo")
    mocker.patch("app.main.views.email_branding.delete_email_temp_files_created_by")

    client_request.login(platform_admin_user)
    client_request.post(
        ".create_email_branding",
        _content_type="multipart/form-data",
        _data=data,
    )

    assert mock_create_email_branding.called
    assert mock_create_email_branding.call_args == call(
        logo=data["logo"],
        name=data["name"],
        text=data["text"],
        colour=data["colour"],
        brand_type=data["brand_type"],
    )
    assert mock_persist.call_args_list == []


def test_create_email_branding_requires_a_name_when_submitting_logo_details(
    client_request,
    mocker,
    mock_create_email_branding,
    platform_admin_user,
):
    mocker.patch("app.main.views.email_branding.persist_logo")
    mocker.patch("app.main.views.email_branding.delete_email_temp_files_created_by")
    data = {
        "operation": "email-branding-details",
        "logo": "",
        "colour": "#ff0000",
        "text": "new text",
        "name": "",
        "brand_type": "org",
    }
    client_request.login(platform_admin_user)
    page = client_request.post(
        ".create_email_branding",
        _content_type="multipart/form-data",
        _data=data,
        _expected_status=200,
    )

    assert (
        page.select_one(".usa-error-message").text.strip()
        == "Error: This field is required"
    )
    assert mock_create_email_branding.called is False


def test_create_email_branding_does_not_require_a_name_when_uploading_a_file(
    client_request,
    mocker,
    platform_admin_user,
):
    mocker.patch(
        "app.main.views.email_branding.upload_email_logo", return_value="temp_filename"
    )
    data = {
        "file": (BytesIO("".encode("utf-8")), "test.png"),
        "colour": "",
        "text": "",
        "name": "",
        "brand_type": "org",
    }
    client_request.login(platform_admin_user)
    page = client_request.post(
        ".create_email_branding",
        _content_type="multipart/form-data",
        _data=data,
        _follow_redirects=True,
    )

    assert not page.find(".error-message")


def test_create_new_email_branding_when_branding_saved(
    client_request, platform_admin_user, mocker, mock_create_email_branding, fake_uuid
):
    with client_request.session_transaction() as session:
        user_id = session["user_id"]

    data = {
        "logo": "test.png",
        "colour": "#ff0000",
        "text": "new text",
        "name": "new name",
        "brand_type": "org_banner",
    }

    temp_filename = EMAIL_LOGO_LOCATION_STRUCTURE.format(
        temp=TEMP_TAG.format(user_id=user_id),
        unique_id=fake_uuid,
        filename=data["logo"],
    )

    mocker.patch("app.main.views.email_branding.persist_logo")
    mocker.patch("app.main.views.email_branding.delete_email_temp_files_created_by")

    client_request.login(platform_admin_user)
    client_request.post(
        ".create_email_branding",
        logo=temp_filename,
        _content_type="multipart/form-data",
        _data={
            "colour": data["colour"],
            "name": data["name"],
            "text": data["text"],
            "cdn_url": "https://static-logos.cdn.com",
            "brand_type": data["brand_type"],
        },
    )

    updated_logo_name = "{}-{}".format(fake_uuid, data["logo"])

    assert mock_create_email_branding.called
    assert mock_create_email_branding.call_args == call(
        logo=updated_logo_name,
        name=data["name"],
        text=data["text"],
        colour=data["colour"],
        brand_type=data["brand_type"],
    )


@pytest.mark.parametrize(
    ("endpoint", "has_data"),
    [
        ("main.create_email_branding", False),
        ("main.update_email_branding", True),
    ],
)
def test_deletes_previous_temp_logo_after_uploading_logo(
    client_request, platform_admin_user, mocker, endpoint, has_data, fake_uuid
):
    if has_data:
        mocker.patch(
            "app.email_branding_client.get_email_branding",
            return_value=create_email_branding(fake_uuid),
        )

    with client_request.session_transaction() as session:
        user_id = session["user_id"]

    temp_old_filename = EMAIL_LOGO_LOCATION_STRUCTURE.format(
        temp=TEMP_TAG.format(user_id=user_id),
        unique_id=fake_uuid,
        filename="old_test.png",
    )

    temp_filename = EMAIL_LOGO_LOCATION_STRUCTURE.format(
        temp=TEMP_TAG.format(user_id=user_id), unique_id=fake_uuid, filename="test.png"
    )

    mocked_upload_email_logo = mocker.patch(
        "app.main.views.email_branding.upload_email_logo", return_value=temp_filename
    )

    mocked_delete_email_temp_file = mocker.patch(
        "app.main.views.email_branding.delete_email_temp_file"
    )

    client_request.login(platform_admin_user)
    client_request.post(
        "main.create_email_branding",
        logo=temp_old_filename,
        branding_id=fake_uuid,
        _data={"file": (BytesIO("".encode("utf-8")), "test.png")},
        _content_type="multipart/form-data",
    )

    assert mocked_upload_email_logo.called
    assert mocked_delete_email_temp_file.called
    assert mocked_delete_email_temp_file.call_args == call(temp_old_filename)


def test_update_existing_branding(
    client_request,
    platform_admin_user,
    mocker,
    fake_uuid,
    mock_get_email_branding,
    mock_update_email_branding,
):
    with client_request.session_transaction() as session:
        user_id = session["user_id"]

    data = {
        "logo": "test.png",
        "colour": "#0000ff",
        "text": "new text",
        "name": "new name",
        "brand_type": "both",
    }

    temp_filename = EMAIL_LOGO_LOCATION_STRUCTURE.format(
        temp=TEMP_TAG.format(user_id=user_id),
        unique_id=fake_uuid,
        filename=data["logo"],
    )

    mocker.patch("app.main.views.email_branding.persist_logo")
    mocker.patch("app.main.views.email_branding.delete_email_temp_files_created_by")

    client_request.login(platform_admin_user)
    client_request.post(
        ".update_email_branding",
        logo=temp_filename,
        branding_id=fake_uuid,
        _content_type="multipart/form-data",
        _data={
            "colour": data["colour"],
            "name": data["name"],
            "text": data["text"],
            "cdn_url": "https://static-logos.cdn.com",
            "brand_type": data["brand_type"],
        },
    )

    updated_logo_name = "{}-{}".format(fake_uuid, data["logo"])

    assert mock_update_email_branding.called
    assert mock_update_email_branding.call_args == call(
        branding_id=fake_uuid,
        logo=updated_logo_name,
        name=data["name"],
        text=data["text"],
        colour=data["colour"],
        brand_type=data["brand_type"],
    )


def test_temp_logo_is_shown_after_uploading_logo(
    client_request,
    platform_admin_user,
    mocker,
    fake_uuid,
):
    with client_request.session_transaction() as session:
        user_id = session["user_id"]

    temp_filename = EMAIL_LOGO_LOCATION_STRUCTURE.format(
        temp=TEMP_TAG.format(user_id=user_id), unique_id=fake_uuid, filename="test.png"
    )

    mocker.patch(
        "app.main.views.email_branding.upload_email_logo", return_value=temp_filename
    )
    mocker.patch("app.main.views.email_branding.delete_email_temp_file")

    client_request.login(platform_admin_user)
    page = client_request.post(
        "main.create_email_branding",
        _data={"file": (BytesIO("".encode("utf-8")), "test.png")},
        _content_type="multipart/form-data",
        _follow_redirects=True,
    )

    assert page.select_one("#logo-img > img").attrs["src"].endswith(temp_filename)


def test_logo_persisted_when_organization_saved(
    client_request, platform_admin_user, mock_create_email_branding, mocker, fake_uuid
):
    with client_request.session_transaction() as session:
        user_id = session["user_id"]

    temp_filename = EMAIL_LOGO_LOCATION_STRUCTURE.format(
        temp=TEMP_TAG.format(user_id=user_id), unique_id=fake_uuid, filename="test.png"
    )

    mocked_upload_email_logo = mocker.patch(
        "app.main.views.email_branding.upload_email_logo"
    )
    mocked_persist_logo = mocker.patch("app.main.views.email_branding.persist_logo")
    mocked_delete_email_temp_files_by = mocker.patch(
        "app.main.views.email_branding.delete_email_temp_files_created_by"
    )

    client_request.login(platform_admin_user)
    client_request.post(
        ".create_email_branding",
        logo=temp_filename,
        _content_type="multipart/form-data",
    )

    assert not mocked_upload_email_logo.called
    assert mocked_persist_logo.called
    assert mocked_delete_email_temp_files_by.called
    assert mocked_delete_email_temp_files_by.call_args == call(user_id)
    assert mock_create_email_branding.called


def test_logo_does_not_get_persisted_if_updating_email_branding_client_throws_an_error(
    client_request, platform_admin_user, mock_create_email_branding, mocker, fake_uuid
):
    with client_request.session_transaction() as session:
        user_id = session["user_id"]

    temp_filename = EMAIL_LOGO_LOCATION_STRUCTURE.format(
        temp=TEMP_TAG.format(user_id=user_id), unique_id=fake_uuid, filename="test.png"
    )

    mocked_persist_logo = mocker.patch("app.main.views.email_branding.persist_logo")
    mocked_delete_email_temp_files_by = mocker.patch(
        "app.main.views.email_branding.delete_email_temp_files_created_by"
    )
    mocker.patch(
        "app.main.views.email_branding.email_branding_client.create_email_branding",
        side_effect=HTTPError(),
    )

    client_request.login(platform_admin_user)
    client_request.post(
        ".create_email_branding",
        logo=temp_filename,
        _content_type="multipart/form-data",
        _expected_status=500,
    )

    assert not mocked_persist_logo.called
    assert not mocked_delete_email_temp_files_by.called


@pytest.mark.parametrize(
    ("colour_hex", "expected_status_code"),
    [
        ("#FF00FF", 302),
        ("hello", 200),
        ("", 302),
    ],
)
def test_colour_regex_validation(
    client_request,
    platform_admin_user,
    mocker,
    fake_uuid,
    colour_hex,
    expected_status_code,
    mock_create_email_branding,
):
    data = {
        "logo": None,
        "colour": colour_hex,
        "text": "new text",
        "name": "new name",
        "brand_type": "org",
    }

    mocker.patch("app.main.views.email_branding.delete_email_temp_files_created_by")

    client_request.login(platform_admin_user)
    client_request.post(
        ".create_email_branding",
        _content_type="multipart/form-data",
        _data=data,
        _expected_status=expected_status_code,
    )