from unittest.mock import patch

import pytest

from app.services.cloudinary_service import (
    delete_image,
    optimize_delivery_image_url,
    optimize_delivery_image_urls,
    upload_image,
)


@pytest.fixture
def mock_settings():
    with patch("app.services.cloudinary_service.settings") as mock_settings:
        yield mock_settings


@pytest.fixture
def mock_uploader():
    with patch("app.services.cloudinary_service.cloudinary.uploader") as mock_uploader:
        yield mock_uploader


def test_upload_image_not_configured(mock_settings):
    mock_settings.CLOUDINARY_CLOUD_NAME = None
    result = upload_image(b"test_bytes")
    assert result == {
        "url": None,
        "public_id": None,
        "error": "Cloudinary not configured",
    }


def test_upload_image_success(mock_settings, mock_uploader):
    mock_settings.CLOUDINARY_CLOUD_NAME = "test_cloud"
    mock_uploader.upload.return_value = {
        "secure_url": "https://res.cloudinary.com/test_cloud/image/upload/v1/test_id.jpg",
        "public_id": "test_id",
    }

    result = upload_image(b"test_bytes")

    assert result == {
        "url": "https://res.cloudinary.com/test_cloud/image/upload/f_auto,q_auto/v1/test_id.jpg",
        "public_id": "test_id",
    }
    mock_uploader.upload.assert_called_once_with(
        b"test_bytes",
        folder="gate-prep/questions",
        resource_type="image",
        transformation=[
            {"fetch_format": "auto", "quality": "auto"},
            {"width": 1200, "crop": "limit"},
        ],
    )


def test_optimize_delivery_image_url_adds_auto_transforms():
    url = "https://res.cloudinary.com/test_cloud/image/upload/v1/test_id.jpg"

    result = optimize_delivery_image_url(url)

    assert (
        result
        == "https://res.cloudinary.com/test_cloud/image/upload/f_auto,q_auto/v1/test_id.jpg"
    )


def test_optimize_delivery_image_url_is_idempotent():
    url = "https://res.cloudinary.com/test_cloud/image/upload/f_auto,q_auto/v1/test_id.jpg"

    result = optimize_delivery_image_url(url)

    assert result == url


def test_optimize_delivery_image_url_ignores_non_cloudinary_url():
    url = "/uploads/test_id.jpg"

    result = optimize_delivery_image_url(url)

    assert result == url


def test_optimize_delivery_image_urls_transforms_mapping_values():
    image_urls = {
        "A": "https://res.cloudinary.com/test_cloud/image/upload/v1/option_a.jpg",
        "B": "/uploads/option_b.jpg",
    }

    result = optimize_delivery_image_urls(image_urls)

    assert result == {
        "A": "https://res.cloudinary.com/test_cloud/image/upload/f_auto,q_auto/v1/option_a.jpg",
        "B": "/uploads/option_b.jpg",
    }
    assert result is not image_urls


def test_upload_image_exception(mock_settings, mock_uploader):
    mock_settings.CLOUDINARY_CLOUD_NAME = "test_cloud"
    mock_uploader.upload.side_effect = Exception("Upload failed")

    result = upload_image(b"test_bytes")

    assert result == {"url": None, "public_id": None, "error": "Upload failed"}


def test_delete_image_not_configured(mock_settings):
    mock_settings.CLOUDINARY_CLOUD_NAME = None
    result = delete_image("test_id")
    assert result is False


def test_delete_image_no_public_id(mock_settings):
    mock_settings.CLOUDINARY_CLOUD_NAME = "test_cloud"
    assert delete_image(None) is False
    assert delete_image("") is False


def test_delete_image_success(mock_settings, mock_uploader):
    mock_settings.CLOUDINARY_CLOUD_NAME = "test_cloud"
    mock_uploader.destroy.return_value = {"result": "ok"}

    result = delete_image("test_id")

    assert result is True
    mock_uploader.destroy.assert_called_once_with("test_id")


def test_delete_image_exception(mock_settings, mock_uploader):
    mock_settings.CLOUDINARY_CLOUD_NAME = "test_cloud"
    mock_uploader.destroy.side_effect = Exception("Delete failed")

    result = delete_image("test_id")

    assert result is False