import abc
from dataclasses import dataclass

import draccus


@dataclass
class CameraConfig(draccus.ChoiceRegistry, abc.ABC):
    @property
    def type(self) -> str:
        return self.get_choice_name(self.__class__)


@CameraConfig.register_subclass("opencv")
@dataclass
class OpenCVCameraConfig(CameraConfig):
    """
    Example of tested options for Intel Real Sense D405:

    ```python
    OpenCVCameraConfig(0, 30, 640, 480)
    OpenCVCameraConfig(0, 60, 640, 480)
    OpenCVCameraConfig(0, 90, 640, 480)
    OpenCVCameraConfig(0, 30, 1280, 720)
    ```
    """

    camera_index: int
    fps: int | None = None
    width: int | None = None
    height: int | None = None
    color_mode: str = "rgb"
    channels: int | None = None
    rotation: int | None = None
    mock: bool = False

    def __post_init__(self):
        if self.color_mode not in ["rgb", "bgr"]:
            raise ValueError(
                f"`color_mode` is expected to be 'rgb' or 'bgr', but {self.color_mode} is provided."
            )

        self.channels = 3

        if self.rotation not in [-90, None, 90, 180]:
            raise ValueError(f"`rotation` must be in [-90, None, 90, 180] (got {self.rotation})")


@CameraConfig.register_subclass("intelrealsense")
@dataclass
class IntelRealSenseCameraConfig(CameraConfig):
    """
    Example of tested options for Intel Real Sense D405:

    ```python
    IntelRealSenseCameraConfig(128422271347, 30, 640, 480)
    IntelRealSenseCameraConfig(128422271347, 60, 640, 480)
    IntelRealSenseCameraConfig(128422271347, 90, 640, 480)
    IntelRealSenseCameraConfig(128422271347, 30, 1280, 720)
    IntelRealSenseCameraConfig(128422271347, 30, 640, 480, use_depth=True)
    IntelRealSenseCameraConfig(128422271347, 30, 640, 480, rotation=90)
    ```
    """

    name: str | None = None
    serial_number: int | None = None
    fps: int | None = None
    width: int | None = None
    height: int | None = None
    color_mode: str = "rgb"
    channels: int | None = None
    use_depth: bool = False
    force_hardware_reset: bool = True
    rotation: int | None = None
    mock: bool = False

    def __post_init__(self):
        # bool is stronger than is None, since it works with empty strings
        if bool(self.name) and bool(self.serial_number):
            raise ValueError(
                f"One of them must be set: name or serial_number, but {self.name=} and {self.serial_number=} provided."
            )

        if self.color_mode not in ["rgb", "bgr"]:
            raise ValueError(
                f"`color_mode` is expected to be 'rgb' or 'bgr', but {self.color_mode} is provided."
            )

        self.channels = 3

        at_least_one_is_not_none = self.fps is not None or self.width is not None or self.height is not None
        at_least_one_is_none = self.fps is None or self.width is None or self.height is None
        if at_least_one_is_not_none and at_least_one_is_none:
            raise ValueError(
                "For `fps`, `width` and `height`, either all of them need to be set, or none of them, "
                f"but {self.fps=}, {self.width=}, {self.height=} were provided."
            )

        if self.rotation not in [-90, None, 90, 180]:
            raise ValueError(f"`rotation` must be in [-90, None, 90, 180] (got {self.rotation})")