from __future__ import annotations

import pytest

from mcp_sd15.errors import InvalidRequestError
from mcp_sd15.schema import (
    ControlMode,
    GuidedImageRequest,
    ImageSize,
    InpaintImageRequest,
    TextToImageRequest,
)


def test_text_request_applies_defaults() -> None:
    request = TextToImageRequest.create("  a castle  ", default_size="landscape_512")
    assert request.positive_prompt == "a castle"
    assert request.negative_prompt == ""
    assert request.size is ImageSize.LANDSCAPE_512
    assert request.size.dimensions == (512, 384)


@pytest.mark.parametrize("prompt", ["", "   ", None, 3])
def test_positive_prompt_is_required(prompt: object) -> None:
    with pytest.raises(InvalidRequestError, match="positive_prompt"):
        TextToImageRequest.create(prompt)  # type: ignore[arg-type]


def test_guided_mode_is_an_enum() -> None:
    request = GuidedImageRequest.create("cat", "openpose_full", "abc")
    assert request.control_mode is ControlMode.OPENPOSE_FULL
    with pytest.raises(InvalidRequestError, match="control_mode"):
        GuidedImageRequest.create("cat", "canny", "abc")


def test_inpaint_requires_both_images() -> None:
    with pytest.raises(InvalidRequestError, match="mask_image"):
        InpaintImageRequest.create("repair", "abc", "")


def test_arbitrary_dimensions_are_not_accepted() -> None:
    with pytest.raises(InvalidRequestError, match="size"):
        TextToImageRequest.create("cat", size="640x480")


def test_base_prompts_are_combined_with_user_prompts() -> None:
    request = TextToImageRequest.create(
        "a cat",
        "blurry",
        base_positive="masterpiece, best quality",
        base_negative="low quality, watermark",
    )
    assert request.positive_prompt == "masterpiece, best quality, a cat"
    assert request.negative_prompt == "low quality, watermark\nblurry"


def test_base_positive_only_does_not_add_trailing_separator() -> None:
    request = TextToImageRequest.create(
        "a cat",
        base_positive="masterpiece",
    )
    assert request.positive_prompt == "masterpiece, a cat"
    assert request.negative_prompt == ""


def test_base_negative_only_does_not_add_leading_separator() -> None:
    request = TextToImageRequest.create(
        "a cat",
        "blurry",
        base_negative="low quality",
    )
    assert request.positive_prompt == "a cat"
    assert request.negative_prompt == "low quality\nblurry"


def test_empty_base_prompts_preserve_user_prompts() -> None:
    request = TextToImageRequest.create("a cat", "blurry")
    assert request.positive_prompt == "a cat"
    assert request.negative_prompt == "blurry"


def test_guided_request_combines_base_prompts() -> None:
    request = GuidedImageRequest.create(
        "a dancer",
        "openpose",
        "abc",
        "deformed",
        base_positive="masterpiece",
        base_negative="low quality",
    )
    assert request.positive_prompt == "masterpiece, a dancer"
    assert request.negative_prompt == "low quality\ndeformed"


def test_inpaint_request_combines_base_prompts() -> None:
    request = InpaintImageRequest.create(
        "a vase",
        "abc",
        "def",
        "artifacts",
        base_positive="masterpiece",
        base_negative="low quality",
    )
    assert request.positive_prompt == "masterpiece, a vase"
    assert request.negative_prompt == "low quality\nartifacts"