defmodule SupermakerAiImageMaster do
  @moduledoc """
  A module for interacting with the Supermaker AI Image service.
  Provides utility functions for constructing URLs and managing image requests.
  """

  @base_url "https://supermaker.ai/image/"

  @doc """
  Builds a URL for the Supermaker AI Image service with optional parameters.

  ## Examples

      iex> build_url("generate", prompt: "A cat wearing a hat")
      "https://supermaker.ai/image/generate?prompt=A%20cat%20wearing%20a%20hat"

      iex> build_url("edit", image_url: "https://example.com/image.jpg", mask_url: "https://example.com/mask.png")
      "https://supermaker.ai/image/edit?image_url=https%3A%2F%2Fexample.com%2Fimage.jpg&mask_url=https%3A%2F%2Fexample.com%2Fmask.png"

  """
  def build_url(endpoint, params \\ []) do
    url = @base_url <> endpoint

    if params == [] do
      url
    else
      query_string =
        params
        |> Enum.map(fn {key, value} ->
          "#{key}=#{URI.encode(value)}"
        end)
        |> Enum.join("&")

      "#{url}?#{query_string}"
    end
  end

  @doc """
  Generates a URL for image generation based on a text prompt.

  ## Examples

      iex> generate_url("A futuristic cityscape")
      "https://supermaker.ai/image/generate?prompt=A%20futuristic%20cityscape"

  """
  def generate_url(prompt) do
    build_url("generate", prompt: prompt)
  end

  @doc """
  Generates a URL for image editing, combining an existing image with a mask.

  ## Examples

      iex> edit_url("https://example.com/image.jpg", "https://example.com/mask.png")
      "https://supermaker.ai/image/edit?image_url=https%3A%2F%2Fexample.com%2Fimage.jpg&mask_url=https%3A%2F%2Fexample.com%2Fmask.png"

  """
  def edit_url(image_url, mask_url) do
    build_url("edit", image_url: image_url, mask_url: mask_url)
  end

  @doc """
  Generates a URL for image upscaling.

  ## Examples
      iex> upscale_url("https://example.com/image.jpg", scale: 2)
      "https://supermaker.ai/image/upscale?image_url=https%3A%2F%2Fexample.com%2Fimage.jpg&scale=2"
  """
  def upscale_url(image_url, opts \\ []) do
    build_url("upscale", Keyword.merge([image_url: image_url], opts))
  end

  @doc """
  Generates a URL for removing background from an image.

  ## Examples
      iex> remove_background_url("https://example.com/image.jpg")
      "https://supermaker.ai/image/remove_background?image_url=https%3A%2F%2Fexample.com%2Fimage.jpg"
  """
  def remove_background_url(image_url) do
    build_url("remove_background", image_url: image_url)
  end
end