import numpy

from typing import Any, Callable, Mapping

from .types import Vec2, Vec3, Vec4

VEC2_ZERO = (0.0, 0.0)
DEFAULT_VEC2 = ("VEC2", {"default": VEC2_ZERO})

VEC3_ZERO = (0.0, 0.0, 0.0)
DEFAULT_VEC3 = ("VEC3", {"default": VEC3_ZERO})

VEC4_ZERO = (0.0, 0.0, 0.0, 0.0)
DEFAULT_VEC4 = ("VEC4", {"default": VEC4_ZERO})

VEC_UNARY_OPERATIONS: Mapping[str, Callable[[numpy.ndarray], numpy.ndarray]] = {
    "Neg": lambda a: -a,
    "Normalize": lambda a: a / numpy.linalg.norm(a),
}

VEC_TO_SCALAR_UNARY_OPERATION: Mapping[str, Callable[[numpy.ndarray], float]] = {
    "Norm": lambda a: numpy.linalg.norm(a).astype(float),
}

VEC_UNARY_CONDITIONS: Mapping[str, Callable[[numpy.ndarray], bool]] = {
    "IsZero": lambda a: not numpy.any(a).astype(bool),
    "IsNotZero": lambda a: numpy.any(a).astype(bool),
    "IsNormalized": lambda a: numpy.allclose(a, a / numpy.linalg.norm(a)),
    "IsNotNormalized": lambda a: not numpy.allclose(a, a / numpy.linalg.norm(a)),
}

VEC_BINARY_OPERATIONS: Mapping[
    str, Callable[[numpy.ndarray, numpy.ndarray], numpy.ndarray]
] = {
    "Add": lambda a, b: a + b,
    "Sub": lambda a, b: a - b,
    "Cross": lambda a, b: numpy.cross(a, b),
}

VEC_TO_SCALAR_BINARY_OPERATION: Mapping[
    str, Callable[[numpy.ndarray, numpy.ndarray], float]
] = {
    "Dot": lambda a, b: numpy.dot(a, b),
    "Distance": lambda a, b: numpy.linalg.norm(a - b).astype(float),
}

VEC_BINARY_CONDITIONS: Mapping[str, Callable[[numpy.ndarray, numpy.ndarray], bool]] = {
    "Eq": lambda a, b: numpy.allclose(a, b),
    "Neq": lambda a, b: not numpy.allclose(a, b),
}

VEC_SCALAR_OPERATION: Mapping[str, Callable[[numpy.ndarray, float], numpy.ndarray]] = {
    "Mul": lambda a, b: a * b,
    "Div": lambda a, b: a / b,
}


def _vec2_from_numpy(a: numpy.ndarray) -> Vec2:
    return (
        float(a[0]),
        float(a[1]),
    )


def _vec3_from_numpy(a: numpy.ndarray) -> Vec3:
    return (
        float(a[0]),
        float(a[1]),
        float(a[2]),
    )


def _vec4_from_numpy(a: numpy.ndarray) -> Vec4:
    return (
        float(a[0]),
        float(a[1]),
        float(a[2]),
        float(a[3]),
    )


class Vec2UnaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_UNARY_OPERATIONS.keys()),),
                "a": DEFAULT_VEC2,
            }
        }

    RETURN_TYPES = ("VEC2",)
    FUNCTION = "op"
    CATEGORY = "math/vec2"

    def op(self, op: str, a: Vec2) -> tuple[Vec2]:
        return (_vec2_from_numpy(VEC_UNARY_OPERATIONS[op](numpy.array(a))),)


class Vec2ToScalarUnaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_TO_SCALAR_UNARY_OPERATION.keys()),),
                "a": DEFAULT_VEC2,
            }
        }

    RETURN_TYPES = ("FLOAT",)
    FUNCTION = "op"
    CATEGORY = "math/vec2"

    def op(self, op: str, a: Vec2) -> tuple[float]:
        return (VEC_TO_SCALAR_UNARY_OPERATION[op](numpy.array(a)),)


class Vec2UnaryCondition:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_UNARY_CONDITIONS.keys()),),
                "a": DEFAULT_VEC2,
            }
        }

    RETURN_TYPES = ("BOOL",)
    FUNCTION = "op"
    CATEGORY = "math/vec2"

    def op(self, op: str, a: Vec2) -> tuple[bool]:
        return (VEC_UNARY_CONDITIONS[op](numpy.array(a)),)


class Vec2BinaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_BINARY_OPERATIONS.keys()),),
                "a": DEFAULT_VEC2,
                "b": DEFAULT_VEC2,
            }
        }

    RETURN_TYPES = ("VEC2",)
    FUNCTION = "op"
    CATEGORY = "math/vec2"

    def op(self, op: str, a: Vec2, b: Vec2) -> tuple[Vec2]:
        return (
            _vec2_from_numpy(VEC_BINARY_OPERATIONS[op](numpy.array(a), numpy.array(b))),
        )


class Vec2ToScalarBinaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_TO_SCALAR_BINARY_OPERATION.keys()),),
                "a": DEFAULT_VEC2,
                "b": DEFAULT_VEC2,
            }
        }

    RETURN_TYPES = ("FLOAT",)
    FUNCTION = "op"
    CATEGORY = "math/vec2"

    def op(self, op: str, a: Vec2, b: Vec2) -> tuple[float]:
        return (VEC_TO_SCALAR_BINARY_OPERATION[op](numpy.array(a), numpy.array(b)),)


class Vec2BinaryCondition:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_BINARY_CONDITIONS.keys()),),
                "a": DEFAULT_VEC2,
                "b": DEFAULT_VEC2,
            }
        }

    RETURN_TYPES = ("BOOL",)
    FUNCTION = "op"
    CATEGORY = "math/vec2"

    def op(self, op: str, a: Vec2, b: Vec2) -> tuple[bool]:
        return (VEC_BINARY_CONDITIONS[op](numpy.array(a), numpy.array(b)),)


class Vec2ScalarOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_SCALAR_OPERATION.keys()),),
                "a": DEFAULT_VEC2,
                "b": ("FLOAT",),
            }
        }

    RETURN_TYPES = ("VEC2",)
    FUNCTION = "op"
    CATEGORY = "math/vec2"

    def op(self, op: str, a: Vec2, b: float) -> tuple[Vec2]:
        return (_vec2_from_numpy(VEC_SCALAR_OPERATION[op](numpy.array(a), b)),)


class Vec3UnaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_UNARY_OPERATIONS.keys()),),
                "a": DEFAULT_VEC3,
            }
        }

    RETURN_TYPES = ("VEC3",)
    FUNCTION = "op"
    CATEGORY = "math/vec3"

    def op(self, op: str, a: Vec3) -> tuple[Vec3]:
        return (_vec3_from_numpy(VEC_UNARY_OPERATIONS[op](numpy.array(a))),)


class Vec3ToScalarUnaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_TO_SCALAR_UNARY_OPERATION.keys()),),
                "a": DEFAULT_VEC3,
            }
        }

    RETURN_TYPES = ("FLOAT",)
    FUNCTION = "op"
    CATEGORY = "math/vec3"

    def op(self, op: str, a: Vec3) -> tuple[float]:
        return (VEC_TO_SCALAR_UNARY_OPERATION[op](numpy.array(a)),)


class Vec3UnaryCondition:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_UNARY_CONDITIONS.keys()),),
                "a": DEFAULT_VEC3,
            }
        }

    RETURN_TYPES = ("BOOL",)
    FUNCTION = "op"
    CATEGORY = "math/vec3"

    def op(self, op: str, a: Vec3) -> tuple[bool]:
        return (VEC_UNARY_CONDITIONS[op](numpy.array(a)),)


class Vec3BinaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_BINARY_OPERATIONS.keys()),),
                "a": DEFAULT_VEC3,
                "b": DEFAULT_VEC3,
            }
        }

    RETURN_TYPES = ("VEC3",)
    FUNCTION = "op"
    CATEGORY = "math/vec3"

    def op(self, op: str, a: Vec3, b: Vec3) -> tuple[Vec3]:
        return (
            _vec3_from_numpy(VEC_BINARY_OPERATIONS[op](numpy.array(a), numpy.array(b))),
        )


class Vec3ToScalarBinaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_TO_SCALAR_BINARY_OPERATION.keys()),),
                "a": DEFAULT_VEC3,
                "b": DEFAULT_VEC3,
            }
        }

    RETURN_TYPES = ("FLOAT",)
    FUNCTION = "op"
    CATEGORY = "math/vec3"

    def op(self, op: str, a: Vec3, b: Vec3) -> tuple[float]:
        return (VEC_TO_SCALAR_BINARY_OPERATION[op](numpy.array(a), numpy.array(b)),)


class Vec3BinaryCondition:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_BINARY_CONDITIONS.keys()),),
                "a": DEFAULT_VEC3,
                "b": DEFAULT_VEC3,
            }
        }

    RETURN_TYPES = ("BOOL",)
    FUNCTION = "op"
    CATEGORY = "math/vec3"

    def op(self, op: str, a: Vec3, b: Vec3) -> tuple[bool]:
        return (VEC_BINARY_CONDITIONS[op](numpy.array(a), numpy.array(b)),)


class Vec3ScalarOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_SCALAR_OPERATION.keys()),),
                "a": DEFAULT_VEC3,
                "b": ("FLOAT",),
            }
        }

    RETURN_TYPES = ("VEC3",)
    FUNCTION = "op"
    CATEGORY = "math/vec3"

    def op(self, op: str, a: Vec3, b: float) -> tuple[Vec3]:
        return (_vec3_from_numpy(VEC_SCALAR_OPERATION[op](numpy.array(a), b)),)


class Vec4UnaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_UNARY_OPERATIONS.keys()),),
                "a": DEFAULT_VEC4,
            }
        }

    RETURN_TYPES = ("VEC4",)
    FUNCTION = "op"
    CATEGORY = "math/vec4"

    def op(self, op: str, a: Vec4) -> tuple[Vec4]:
        return (_vec4_from_numpy(VEC_UNARY_OPERATIONS[op](numpy.array(a))),)


class Vec4ToScalarUnaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_TO_SCALAR_UNARY_OPERATION.keys()),),
                "a": DEFAULT_VEC4,
            }
        }

    RETURN_TYPES = ("FLOAT",)
    FUNCTION = "op"
    CATEGORY = "math/vec4"

    def op(self, op: str, a: Vec4) -> tuple[float]:
        return (VEC_TO_SCALAR_UNARY_OPERATION[op](numpy.array(a)),)


class Vec4UnaryCondition:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_UNARY_CONDITIONS.keys()),),
                "a": DEFAULT_VEC4,
            }
        }

    RETURN_TYPES = ("BOOL",)
    FUNCTION = "op"
    CATEGORY = "math/vec4"

    def op(self, op: str, a: Vec4) -> tuple[bool]:
        return (VEC_UNARY_CONDITIONS[op](numpy.array(a)),)


class Vec4BinaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_BINARY_OPERATIONS.keys()),),
                "a": DEFAULT_VEC4,
                "b": DEFAULT_VEC4,
            }
        }

    RETURN_TYPES = ("VEC4",)
    FUNCTION = "op"
    CATEGORY = "math/vec4"

    def op(self, op: str, a: Vec4, b: Vec4) -> tuple[Vec4]:
        return (
            _vec4_from_numpy(VEC_BINARY_OPERATIONS[op](numpy.array(a), numpy.array(b))),
        )


class Vec4ToScalarBinaryOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_TO_SCALAR_BINARY_OPERATION.keys()),),
                "a": DEFAULT_VEC4,
                "b": DEFAULT_VEC4,
            }
        }

    RETURN_TYPES = ("FLOAT",)
    FUNCTION = "op"
    CATEGORY = "math/vec4"

    def op(self, op: str, a: Vec4, b: Vec4) -> tuple[float]:
        return (VEC_TO_SCALAR_BINARY_OPERATION[op](numpy.array(a), numpy.array(b)),)


class Vec4BinaryCondition:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_BINARY_CONDITIONS.keys()),),
                "a": DEFAULT_VEC4,
                "b": DEFAULT_VEC4,
            }
        }

    RETURN_TYPES = ("BOOL",)
    FUNCTION = "op"
    CATEGORY = "math/vec4"

    def op(self, op: str, a: Vec4, b: Vec4) -> tuple[bool]:
        return (VEC_BINARY_CONDITIONS[op](numpy.array(a), numpy.array(b)),)


class Vec4ScalarOperation:
    @classmethod
    def INPUT_TYPES(cls) -> Mapping[str, Any]:
        return {
            "required": {
                "op": (list(VEC_SCALAR_OPERATION.keys()),),
                "a": DEFAULT_VEC4,
                "b": ("FLOAT",),
            }
        }

    RETURN_TYPES = ("VEC4",)
    FUNCTION = "op"
    CATEGORY = "math/vec4"

    def op(self, op: str, a: Vec4, b: float) -> tuple[Vec4]:
        return (_vec4_from_numpy(VEC_SCALAR_OPERATION[op](numpy.array(a), b)),)


NODE_CLASS_MAPPINGS = {
    "CM_Vec2UnaryOperation": Vec2UnaryOperation,
    "CM_Vec2UnaryCondition": Vec2UnaryCondition,
    "CM_Vec2ToScalarUnaryOperation": Vec2ToScalarUnaryOperation,
    "CM_Vec2BinaryOperation": Vec2BinaryOperation,
    "CM_Vec2BinaryCondition": Vec2BinaryCondition,
    "CM_Vec2ToScalarBinaryOperation": Vec2ToScalarBinaryOperation,
    "CM_Vec2ScalarOperation": Vec2ScalarOperation,
    "CM_Vec3UnaryOperation": Vec3UnaryOperation,
    "CM_Vec3UnaryCondition": Vec3UnaryCondition,
    "CM_Vec3ToScalarUnaryOperation": Vec3ToScalarUnaryOperation,
    "CM_Vec3BinaryOperation": Vec3BinaryOperation,
    "CM_Vec3BinaryCondition": Vec3BinaryCondition,
    "CM_Vec3ToScalarBinaryOperation": Vec3ToScalarBinaryOperation,
    "CM_Vec3ScalarOperation": Vec3ScalarOperation,
    "CM_Vec4UnaryOperation": Vec4UnaryOperation,
    "CM_Vec4UnaryCondition": Vec4UnaryCondition,
    "CM_Vec4ToScalarUnaryOperation": Vec4ToScalarUnaryOperation,
    "CM_Vec4BinaryOperation": Vec4BinaryOperation,
    "CM_Vec4BinaryCondition": Vec4BinaryCondition,
    "CM_Vec4ToScalarBinaryOperation": Vec4ToScalarBinaryOperation,
    "CM_Vec4ScalarOperation": Vec4ScalarOperation,
}