# Copyright (c) 2023 Kyle Schouviller (https://github.com/kyle0654)

from typing import Literal

import numpy as np

from invokeai.app.invocations.primitives import IntegerOutput

from .baseinvocation import BaseInvocation, FieldDescriptions, InputField, InvocationContext, tags, title


@title("Add Integers")
@tags("math")
class AddInvocation(BaseInvocation):
    """Adds two numbers"""

    type: Literal["add"] = "add"

    # Inputs
    a: int = InputField(default=0, description=FieldDescriptions.num_1)
    b: int = InputField(default=0, description=FieldDescriptions.num_2)

    def invoke(self, context: InvocationContext) -> IntegerOutput:
        return IntegerOutput(value=self.a + self.b)


@title("Subtract Integers")
@tags("math")
class SubtractInvocation(BaseInvocation):
    """Subtracts two numbers"""

    type: Literal["sub"] = "sub"

    # Inputs
    a: int = InputField(default=0, description=FieldDescriptions.num_1)
    b: int = InputField(default=0, description=FieldDescriptions.num_2)

    def invoke(self, context: InvocationContext) -> IntegerOutput:
        return IntegerOutput(value=self.a - self.b)


@title("Multiply Integers")
@tags("math")
class MultiplyInvocation(BaseInvocation):
    """Multiplies two numbers"""

    type: Literal["mul"] = "mul"

    # Inputs
    a: int = InputField(default=0, description=FieldDescriptions.num_1)
    b: int = InputField(default=0, description=FieldDescriptions.num_2)

    def invoke(self, context: InvocationContext) -> IntegerOutput:
        return IntegerOutput(value=self.a * self.b)


@title("Divide Integers")
@tags("math")
class DivideInvocation(BaseInvocation):
    """Divides two numbers"""

    type: Literal["div"] = "div"

    # Inputs
    a: int = InputField(default=0, description=FieldDescriptions.num_1)
    b: int = InputField(default=0, description=FieldDescriptions.num_2)

    def invoke(self, context: InvocationContext) -> IntegerOutput:
        return IntegerOutput(value=int(self.a / self.b))


@title("Random Integer")
@tags("math")
class RandomIntInvocation(BaseInvocation):
    """Outputs a single random integer."""

    type: Literal["rand_int"] = "rand_int"

    # Inputs
    low: int = InputField(default=0, description="The inclusive low value")
    high: int = InputField(default=np.iinfo(np.int32).max, description="The exclusive high value")

    def invoke(self, context: InvocationContext) -> IntegerOutput:
        return IntegerOutput(value=np.random.randint(self.low, self.high))