#' Scale constructors for fill and colors
#'
#' This function is based on [palette()]. If palette is NULL, the used palette will be magma from gpplot2's viridis scale constructors.
#'
#' @inheritParams palette_gen
#'
#' @param reverse_guide Boolean indicating whether the guide should be reversed.
#' @param title_position Position of the title. See [ggplot2::guide_legend()]'s title.position argument.
#' @param ... Additional arguments passed to [ggplot2::discrete_scale()] if discrete or [ggplot2::scale_fill_gradient()] if continuous.
#'
#' @export
scale_color_visualizer_discrete <- function(
    palette = "cat_5_main",
    direction = 1,
    reverse_guide = TRUE,
    title_position = NULL,
    ...) {
  if (!(is.null(palette))) {
    ggplot2::discrete_scale(
      "color",
      palette = palette_gen(palette, "categorical", direction),
      guide = ggplot2::guide_legend(
        title.position = title_position,
        draw.ulim = TRUE,
        draw.llim = TRUE,
        # ticks.colour = "#F1F3F5",
        reverse = reverse_guide
      ),
      ...
    )
  } else {
    ggplot2::scale_colour_viridis_d(
      direction = direction,
      guide = ggplot2::guide_legend(
        title.position = title_position,
        draw.ulim = TRUE,
        draw.llim = TRUE,
        # ticks.colour = "#F1F3F5",
        reverse = reverse_guide
      ),
      ...
    )
  }
}

#' @rdname scale_color_visualizer_discrete
#'
#' @export
scale_fill_visualizer_discrete <- function(
    palette = "cat_5_main",
    direction = 1,
    reverse_guide = TRUE,
    title_position = NULL,
    ...) {
  if (!(is.null(palette))) {
    ggplot2::discrete_scale(
      "fill",
      palette = palette_gen(palette, "categorical", direction),
      guide = ggplot2::guide_legend(
        title.position = title_position,
        draw.ulim = TRUE,
        draw.llim = TRUE,
        # ticks.colour = "#F1F3F5",
        reverse = reverse_guide
      ),
      ...
    )
  } else {
    ggplot2::scale_fill_viridis_d(
      direction = direction,
      guide = ggplot2::guide_legend(
        title.position = title_position,
        draw.ulim = TRUE,
        draw.llim = TRUE,
        # ticks.colour = "#F1F3F5",
        reverse = reverse_guide
      ),
      ...
    )
  }
}

#' @rdname scale_color_visualizer_discrete
#'
#' @export
scale_fill_visualizer_continuous <- function(
    palette = "seq_5_main",
    direction = 1,
    reverse_guide = TRUE,
    title_position = NULL,
    ...) {
  if (!(is.null(palette))) {
    pal <- palette_gen(palette, "continuous", direction)

    ggplot2::scale_fill_gradientn(
      colors = pal(256),
      guide = ggplot2::guide_colorbar(
        title.position = title_position,
        draw.ulim = TRUE,
        draw.llim = TRUE,
        # ticks.colour = "#F1F3F5",
        reverse = reverse_guide
      ),
      ...
    )
  } else {
    ggplot2::scale_fill_viridis_c(
      option = "magma",
      guide = ggplot2::guide_colorbar(
        title.position = title_position,
        draw.ulim = TRUE,
        draw.llim = TRUE,
        # ticks.colour = "#F1F3F5",
        reverse = reverse_guide
      ),
      ...
    )
  }
}

#' @rdname scale_color_visualizer_discrete
#'
#' @export
scale_color_visualizer_continuous <- function(
    palette = "seq_5_main",
    direction = 1,
    reverse_guide = TRUE,
    title_position = NULL,
    ...) {
  if (!(is.null(palette))) {
    pal <- palette_gen(palette, "continuous", direction)

    ggplot2::scale_fill_gradientn(
      colors = pal(256),
      guide = ggplot2::guide_colorbar(
        title.position = title_position,
        draw.ulim = TRUE,
        draw.llim = TRUE,
        # ticks.colour = "#F1F3F5",
        reverse = reverse_guide
      ),
      ...
    )
  } else {
    ggplot2::scale_colour_viridis_c(
      option = "magma",
      guide = ggplot2::guide_colorbar(
        title.position = title_position,
        draw.ulim = TRUE,
        draw.llim = TRUE,
        # ticks.colour = "#F1F3F5",
        reverse = reverse_guide
      ),
      ...
    )
  }
}