# Copyright 2025 Google LLC.
# Copyright (c) Microsoft Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import pytest
import pytest_asyncio
from test_helpers import execute_command, goto_url

LOCALES = ["de-DE", "es-ES", "fr-FR", "it-IT"]


@pytest_asyncio.fixture
async def default_locale(websocket, context_id):
    """
    Returns default locale.
    """
    return await get_locale(websocket, context_id)


@pytest.fixture
def some_locale(default_locale):
    """
    Returns some locale which is not equal to `default_locale` nor to
    `another_locale`.
    """
    for locale in LOCALES:
        if locale != default_locale:
            return locale

    raise Exception(
        f"Unexpectedly could not find locale different from the default {default_locale}"
    )


@pytest.fixture
def another_locale(default_locale, some_locale):
    """
    Returns some another locale which is not equal to `default_locale` nor to
    `some_locale`.
    """
    for locale in LOCALES:
        if locale != default_locale and locale != some_locale:
            return locale

    raise Exception(
        f"Unexpectedly could not find locale different from the default {default_locale} and some {some_locale}"
    )


async def get_locale(websocket, context_id):
    """
    Returns browsing context's current locale.
    """
    resp = await execute_command(
        websocket,
        {
            "method": "script.evaluate",
            "params": {
                "expression": "new Intl.DateTimeFormat().resolvedOptions().locale",
                "target": {"context": context_id},
                "awaitPromise": True,
            },
        },
    )

    return resp["result"]["value"] if "result" in resp else resp


@pytest.mark.asyncio
async def test_locale_set_and_clear(
    websocket, context_id, default_locale, some_locale, another_locale
):
    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [context_id], "locale": some_locale},
        },
    )

    assert (await get_locale(websocket, context_id)) == some_locale

    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [context_id], "locale": another_locale},
        },
    )

    assert (await get_locale(websocket, context_id)) == another_locale

    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [context_id], "locale": None},
        },
    )
    assert (await get_locale(websocket, context_id)) == default_locale


@pytest.mark.asyncio
async def test_locale_set_in_opened_window(
    websocket, context_id, default_locale, some_locale, another_locale
):
    pytest.xfail("crbug.com/444674636")
    await execute_command(
        websocket,
        {
            "method": "session.subscribe",
            "params": {"events": ["browsingContext.contextCreated"]},
        },
    )

    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [context_id], "locale": some_locale},
        },
    )

    assert (await get_locale(websocket, context_id)) == some_locale

    # Open a new tab.
    resp = await execute_command(
        websocket,
        {
            "method": "script.evaluate",
            "params": {
                "expression": "window.open('about:blank')",
                "target": {"context": context_id},
                "awaitPromise": True,
            },
        },
    )

    # Get the new context id.
    new_context_id = resp["result"]["value"]["context"]

    # Assert the locale emulation is not inherited.
    assert (await get_locale(websocket, new_context_id)) == default_locale

    # Assert the locale can be overridden.
    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [new_context_id], "locale": another_locale},
        },
    )
    assert (await get_locale(websocket, new_context_id)) == another_locale

    # Remove locale emulation.
    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [new_context_id], "locale": None},
        },
    )
    assert (await get_locale(websocket, new_context_id)) == default_locale


@pytest.mark.asyncio
async def test_locale_per_user_context(
    websocket, user_context_id, create_context, some_locale, another_locale
):
    # Set different locale overrides for different user contexts.
    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"userContexts": ["default"], "locale": some_locale},
        },
    )
    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"userContexts": [user_context_id], "locale": another_locale},
        },
    )

    # Assert the overrides applied for the right contexts.
    browsing_context_id_1 = await create_context()
    emulated_locale_1 = await get_locale(websocket, browsing_context_id_1)
    assert emulated_locale_1 == some_locale

    browsing_context_id_2 = await create_context(user_context_id)
    emulated_locale_2 = await get_locale(websocket, browsing_context_id_2)
    assert emulated_locale_2 == another_locale


@pytest.mark.asyncio
async def test_locale_per_browsing_context(
    websocket,
    context_id,
    another_context_id,
    create_context,
    some_locale,
    another_locale,
):
    # Set different locale overrides for different user contexts.
    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [context_id], "locale": some_locale},
        },
    )
    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [another_context_id], "locale": another_locale},
        },
    )

    assert await get_locale(websocket, context_id) == some_locale
    assert await get_locale(websocket, another_context_id) == another_locale


@pytest.mark.asyncio
async def test_locale_iframe(
    websocket, context_id, iframe_id, html, default_locale, some_locale, another_locale
):
    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [context_id], "locale": some_locale},
        },
    )

    assert await get_locale(websocket, iframe_id) == some_locale

    # Move iframe out of process
    await goto_url(websocket, iframe_id, html("<h1>FRAME</h1>", same_origin=False))
    # Assert locale emulation persisted.
    assert await get_locale(websocket, iframe_id) == some_locale

    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [context_id], "locale": another_locale},
        },
    )
    assert await get_locale(websocket, iframe_id) == another_locale

    await execute_command(
        websocket,
        {
            "method": "emulation.setLocaleOverride",
            "params": {"contexts": [context_id], "locale": None},
        },
    )
    assert await get_locale(websocket, iframe_id) == default_locale


@pytest.mark.asyncio
async def test_locale_invalid(websocket, context_id):
    INVALID_LOCALE = "abcd"
    with pytest.raises(
        Exception,
        match=str(
            {
                "error": "invalid argument",
                "message": f'Invalid locale "{INVALID_LOCALE}"',
            }
        ),
    ):
        await execute_command(
            websocket,
            {
                "method": "emulation.setLocaleOverride",
                "params": {"contexts": [context_id], "locale": INVALID_LOCALE},
            },
        )