//! Polar scatter plot

use crate::common::color::{Color, ColorWrapper};
use crate::common::{
    Dim, Fill, Font, GroupNorm, HoverInfo, Label, Line, Marker, Mode, Orientation, PlotType,
    Position, Visible,
};
use crate::private;
use crate::Trace;
use serde::Serialize;

#[cfg(feature = "plotly_ndarray")]
use crate::ndarray::ArrayTraces;
use crate::private::{
    copy_iterable_to_vec, to_num_or_string_wrapper, NumOrString, NumOrStringWrapper, TruthyEnum,
};
#[cfg(feature = "plotly_ndarray")]
use ndarray::{Array, Ix1, Ix2};

#[derive(Serialize, Clone, Debug)]
pub struct ScatterPolar<Theta, R>
where
    Theta: Serialize + Clone + 'static,
    R: Serialize + Clone + 'static,
{
    r#type: PlotType,
    #[serde(skip_serializing_if = "Option::is_none")]
    name: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    visible: Option<TruthyEnum<Visible>>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "showlegend")]
    show_legend: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "legendgroup")]
    legend_group: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    opacity: Option<f64>,
    #[serde(skip_serializing_if = "Option::is_none")]
    mode: Option<Mode>,
    #[serde(skip_serializing_if = "Option::is_none")]
    ids: Option<Vec<String>>,
    #[serde(skip_serializing_if = "Option::is_none")]
    theta: Option<Vec<Theta>>,

    #[serde(skip_serializing_if = "Option::is_none")]
    theta0: Option<NumOrStringWrapper>,
    #[serde(skip_serializing_if = "Option::is_none")]
    dtheta: Option<f64>,

    #[serde(skip_serializing_if = "Option::is_none")]
    r: Option<Vec<R>>,

    #[serde(skip_serializing_if = "Option::is_none")]
    r0: Option<NumOrStringWrapper>,
    #[serde(skip_serializing_if = "Option::is_none")]
    dr: Option<f64>,

    #[serde(skip_serializing_if = "Option::is_none")]
    subplot: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    text: Option<Dim<String>>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "textposition")]
    text_position: Option<Dim<Position>>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "texttemplate")]
    text_template: Option<Dim<String>>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "hovertext")]
    hover_text: Option<Dim<String>>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "hoverinfo")]
    hover_info: Option<HoverInfo>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "hovertemplate")]
    hover_template: Option<Dim<String>>,

    #[serde(skip_serializing_if = "Option::is_none")]
    meta: Option<NumOrStringWrapper>,
    #[serde(skip_serializing_if = "Option::is_none")]
    custom_data: Option<Vec<NumOrStringWrapper>>,

    #[serde(skip_serializing_if = "Option::is_none")]
    orientation: Option<Orientation>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "groupnorm")]
    group_norm: Option<GroupNorm>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "selectedpoints")]
    selected_points: Option<Vec<u32>>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "stackgroup")]
    stack_group: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    marker: Option<Marker>,
    #[serde(skip_serializing_if = "Option::is_none")]
    line: Option<Line>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "textfont")]
    text_font: Option<Font>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "cliponaxis")]
    clip_on_axis: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "connectgaps")]
    connect_gaps: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none")]
    fill: Option<Fill>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "fillcolor")]
    fill_color: Option<ColorWrapper>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "hoverlabel")]
    hover_label: Option<Label>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "hoveron")]
    hover_on: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none", rename = "stackgaps")]
    stack_gaps: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    uid: Option<String>,
}

impl<Theta, R> Default for ScatterPolar<Theta, R>
where
    Theta: Serialize + Clone + 'static,
    R: Serialize + Clone + 'static,
{
    fn default() -> Self {
        Self {
            r#type: PlotType::ScatterPolar,
            name: None,
            visible: None,
            show_legend: None,
            legend_group: None,
            opacity: None,
            mode: None,
            ids: None,
            theta: None,
            theta0: None,
            dtheta: None,
            r: None,
            r0: None,
            dr: None,
            subplot: None,
            text: None,
            text_position: None,
            text_template: None,
            hover_text: None,
            hover_info: None,
            hover_template: None,
            meta: None,
            custom_data: None,
            orientation: None,
            group_norm: None,
            selected_points: None,
            stack_group: None,
            marker: None,
            line: None,
            text_font: None,
            clip_on_axis: None,
            connect_gaps: None,
            fill: None,
            fill_color: None,
            hover_label: None,
            hover_on: None,
            stack_gaps: None,
            uid: None,
        }
    }
}

impl<Theta, R> ScatterPolar<Theta, R>
where
    Theta: Serialize + Clone + 'static,
    R: Serialize + Clone + 'static,
{
    pub fn new<I, K>(theta: I, r: K) -> Box<Self>
    where
        I: IntoIterator<Item = Theta>,
        K: IntoIterator<Item = R>,
    {
        let theta = copy_iterable_to_vec(theta);
        let r = copy_iterable_to_vec(r);
        Box::new(Self {
            theta: Some(theta),
            r: Some(r),
            r#type: PlotType::ScatterPolar,
            ..Default::default()
        })
    }

    #[cfg(feature = "plotly_ndarray")]
    pub fn from_array(theta: Array<Theta, Ix1>, r: Array<R, Ix1>) -> Box<Self> {
        Box::new(Self {
            theta: Some(theta.to_vec()),
            r: Some(r.to_vec()),
            r#type: PlotType::ScatterPolar,
            ..Default::default()
        })
    }

    /// Produces `ScatterPolar` traces from a 2 dimensional tensor (`traces_matrix`) indexed by `x`. This
    /// function requires the `ndarray` feature.
    ///
    /// # Arguments
    /// * `x`             - One dimensional array (or view) that represents the `x` axis coordinates.
    /// * `traces_matrix` - Two dimensional array (or view) containing the `y` axis coordinates of
    /// the traces.
    /// * `array_traces`  - Determines whether the traces are arranged in the matrix over the
    /// columns (`ArrayTraces::OverColumns`) or over the rows (`ArrayTraces::OverRows`).
    ///
    /// # Examples
    ///
    /// ```
    /// use plotly::common::Mode;
    /// use plotly::{Plot, ScatterPolar, ArrayTraces};
    /// use ndarray::{Array, Ix1, Ix2};
    ///
    /// fn ndarray_to_traces() {
    ///     let n: usize = 11;
    ///     let theta: Array<f64, Ix1> = Array::range(0., 360., 360. / n as f64);
    ///     let mut rs: Array<f64, Ix2> = Array::zeros((11, 11));
    ///     let mut count = 0.;
    ///     for mut row in rs.gencolumns_mut() {
    ///         for index in 0..row.len() {
    ///             row[index] = count + (index as f64).powf(2.);
    ///         }
    ///         count += 1.;
    ///     }
    ///
    ///     let traces = ScatterPolar::default()
    ///         .mode(Mode::LinesMarkers)
    ///         .to_traces(theta, rs, ArrayTraces::OverColumns);
    ///
    ///     let mut plot = Plot::new();
    ///     plot.add_traces(traces);
    ///     plot.show();
    /// }
    /// fn main() -> std::io::Result<()> {
    ///     ndarray_to_traces();
    ///     Ok(())
    /// }
    /// ```
    #[cfg(feature = "plotly_ndarray")]
    pub fn to_traces(
        &self,
        theta: Array<Theta, Ix1>,
        traces_matrix: Array<R, Ix2>,
        array_traces: ArrayTraces,
    ) -> Vec<Box<dyn Trace>> {
        let mut traces: Vec<Box<dyn Trace>> = Vec::new();
        let mut trace_vectors = private::trace_vectors_from(traces_matrix, array_traces);
        trace_vectors.reverse();
        while !trace_vectors.is_empty() {
            let mut sc = Box::new(self.clone());
            sc.theta = Some(theta.to_vec());
            let data = trace_vectors.pop();
            if let Some(d) = data {
                sc.r = Some(d);
                traces.push(sc);
            }
        }

        traces
    }

    /// Enables WebGL.
    pub fn web_gl_mode(mut self, on: bool) -> Box<Self> {
        self.r#type = if on {
            PlotType::ScatterPolarGL
        } else {
            PlotType::ScatterPolar
        };
        Box::new(self)
    }

    /// Sets the trace name. The trace name appear as the legend item and on hover.
    pub fn name(mut self, name: &str) -> Box<Self> {
        self.name = Some(name.to_owned());
        Box::new(self)
    }

    /// Determines whether or not this trace is visible. If `Visible::LegendOnly`, the trace is not
    /// drawn, but can appear as a legend item (provided that the legend itself is visible).
    pub fn visible(mut self, visible: Visible) -> Box<Self> {
        self.visible = Some(TruthyEnum { e: visible });
        Box::new(self)
    }

    /// Determines whether or not an item corresponding to this trace is shown in the legend.
    pub fn show_legend(mut self, show_legend: bool) -> Box<Self> {
        self.show_legend = Some(show_legend);
        Box::new(self)
    }

    /// Sets the legend group for this trace. Traces part of the same legend group hide/show at the
    /// same time when toggling legend items.
    pub fn legend_group(mut self, legend_group: &str) -> Box<Self> {
        self.legend_group = Some(legend_group.to_owned());
        Box::new(self)
    }

    /// Sets the opacity of the trace.
    pub fn opacity(mut self, opacity: f64) -> Box<Self> {
        self.opacity = Some(opacity);
        Box::new(self)
    }

    /// Determines the drawing mode for this scatter trace. If the provided `Mode` includes
    /// "Text" then the `text` elements appear at the coordinates. Otherwise, the `text` elements
    /// appear on hover. If there are less than 20 points and the trace is not stacked then the
    /// default is `Mode::LinesMarkers`, otherwise it is `Mode::Lines`.
    pub fn mode(mut self, mode: Mode) -> Box<Self> {
        self.mode = Some(mode);
        Box::new(self)
    }

    /// Assigns id labels to each datum. These ids for object constancy of data points during
    /// animation. Should be an array of strings, not numbers or any other type.
    pub fn ids<S: AsRef<str>>(mut self, ids: Vec<S>) -> Box<Self> {
        let ids = private::owned_string_vector(ids);
        self.ids = Some(ids);
        Box::new(self)
    }

    /// Alternate to `x`. Builds a linear space of x coordinates. Use with `dx` where `x0` is the
    /// starting coordinate and `dx` the step.
    pub fn theta0<C: NumOrString>(mut self, theta0: C) -> Box<Self> {
        self.theta0 = Some(theta0.to_num_or_string());
        Box::new(self)
    }

    /// Sets the x coordinate step. See `x0` for more info.
    pub fn dtheta(mut self, dtheta: f64) -> Box<Self> {
        self.dtheta = Some(dtheta);
        Box::new(self)
    }

    /// Alternate to `y`. Builds a linear space of y coordinates. Use with `dy` where `y0` is the
    /// starting coordinate and `dy` the step.
    pub fn r0<C: NumOrString>(mut self, r0: C) -> Box<Self> {
        self.r0 = Some(r0.to_num_or_string());
        Box::new(self)
    }

    /// Sets the y coordinate step. See `y0` for more info.
    pub fn dr(mut self, dr: f64) -> Box<Self> {
        self.dr = Some(dr);
        Box::new(self)
    }

    /// Sets a reference between this trace's data coordinates and a polar subplot. If "polar"
    /// (the default value), the data refer to `layout.polar`. If "polar2", the data refer to
    /// `layout.polar2`, and so on.
    pub fn subplot(mut self, subplot: &str) -> Box<Self> {
        self.subplot = Some(subplot.to_owned());
        Box::new(self)
    }

    /// Sets text elements associated with each (x,y) pair. If a single string, the same string
    /// appears over all the data points. If an array of string, the items are mapped in order to
    /// the this trace's (x,y) coordinates. If the trace `HoverInfo` contains a "text" flag and
    /// `hover_text` is not set, these elements will be seen in the hover labels.
    pub fn text(mut self, text: &str) -> Box<Self> {
        self.text = Some(Dim::Scalar(text.to_owned()));
        Box::new(self)
    }

    /// Sets text elements associated with each (x,y) pair. If a single string, the same string
    /// appears over all the data points. If an array of string, the items are mapped in order to
    /// the this trace's (x,y) coordinates. If trace `HoverInfo` contains a "text" flag and
    /// `hover_text` is not set, these elements will be seen in the hover labels.
    pub fn text_array<S: AsRef<str>>(mut self, text: Vec<S>) -> Box<Self> {
        let text = private::owned_string_vector(text);
        self.text = Some(Dim::Vector(text));
        Box::new(self)
    }

    /// Sets the positions of the `text` elements with respects to the (x,y) coordinates.
    pub fn text_position(mut self, text_position: Position) -> Box<Self> {
        self.text_position = Some(Dim::Scalar(text_position));
        Box::new(self)
    }

    /// Sets the positions of the `text` elements with respects to the (x,y) coordinates.
    pub fn text_position_array(mut self, text_position: Vec<Position>) -> Box<Self> {
        self.text_position = Some(Dim::Vector(text_position));
        Box::new(self)
    }

    /// Template string used for rendering the information text that appear on points. Note that
    /// this will override `textinfo`. Variables are inserted using %{variable}, for example
    /// "y: %{y}". Numbers are formatted using d3-format's syntax %{variable:d3-format}, for example
    /// "Price: %{y:$.2f}". See [format](https://github.com/d3/d3-3.x-api-reference/blob/master/Formatting.md#d3)
    /// for details on the formatting syntax. Dates are formatted using d3-time-format's syntax
    /// %{variable|d3-time-format}, for example "Day: %{2019-01-01|%A}".
    /// See [format](https://github.com/d3/d3-3.x-api-reference/blob/master/Time-Formatting.md#format) for details
    /// on the date formatting syntax. Every attributes that can be specified per-point (the ones
    /// that are `arrayOk: true`) are available.
    pub fn text_template(mut self, text_template: &str) -> Box<Self> {
        self.text_template = Some(Dim::Scalar(text_template.to_owned()));
        Box::new(self)
    }

    /// Template string used for rendering the information text that appear on points. Note that
    /// this will override `textinfo`. Variables are inserted using %{variable}, for example
    /// "y: %{y}". Numbers are formatted using d3-format's syntax %{variable:d3-format}, for example
    /// "Price: %{y:$.2f}". See [format](https://github.com/d3/d3-3.x-api-reference/blob/master/Formatting.md#d3)
    /// for details on the formatting syntax. Dates are formatted using d3-time-format's syntax
    /// %{variable|d3-time-format}, for example "Day: %{2019-01-01|%A}".
    /// See [format](https://github.com/d3/d3-3.x-api-reference/blob/master/Time-Formatting.md#format) for details
    /// on the date formatting syntax. Every attributes that can be specified per-point (the ones
    /// that are `arrayOk: true`) are available.
    pub fn text_template_array<S: AsRef<str>>(mut self, text_template: Vec<S>) -> Box<Self> {
        let text_template = private::owned_string_vector(text_template);
        self.text_template = Some(Dim::Vector(text_template));
        Box::new(self)
    }

    /// Sets hover text elements associated with each (x,y) pair. If a single string, the same
    /// string appears over all the data points. If an array of string, the items are mapped in
    /// order to the this trace's (x,y) coordinates. To be seen, trace `HoverInfo` must contain a
    /// "Text" flag.
    pub fn hover_text(mut self, hover_text: &str) -> Box<Self> {
        self.hover_text = Some(Dim::Scalar(hover_text.to_owned()));
        Box::new(self)
    }

    /// Sets hover text elements associated with each (x,y) pair. If a single string, the same
    /// string appears over all the data points. If an array of string, the items are mapped in
    /// order to the this trace's (x,y) coordinates. To be seen, trace `HoverInfo` must contain a
    /// "Text" flag.
    pub fn hover_text_array<S: AsRef<str>>(mut self, hover_text: Vec<S>) -> Box<Self> {
        let hover_text = private::owned_string_vector(hover_text);
        self.hover_text = Some(Dim::Vector(hover_text));
        Box::new(self)
    }

    /// Determines which trace information appear on hover. If `HoverInfo::None` or `HoverInfo::Skip`
    /// are set, no information is displayed upon hovering. But, if `HoverInfo::None` is set, click
    /// and hover events are still fired.
    pub fn hover_info(mut self, hover_info: HoverInfo) -> Box<Self> {
        self.hover_info = Some(hover_info);
        Box::new(self)
    }

    /// Template string used for rendering the information that appear on hover box. Note that this
    /// will override `HoverInfo`. Variables are inserted using %{variable}, for example "y: %{y}".
    /// Numbers are formatted using d3-format's syntax %{variable:d3-format}, for example
    /// "Price: %{y:$.2f}".
    /// https://github.com/d3/d3-3.x-api-reference/blob/master/Formatting.md#d3_format for details
    /// on the formatting syntax. Dates are formatted using d3-time-format's syntax
    /// %{variable|d3-time-format}, for example "Day: %{2019-01-01|%A}".
    /// https://github.com/d3/d3-3.x-api-reference/blob/master/Time-Formatting.md#format for details
    /// on the date formatting syntax. The variables available in `hovertemplate` are the ones
    /// emitted as event data described at this link https://plotly.com/javascript/plotlyjs-events/#event-data.
    /// Additionally, every attributes that can be specified per-point (the ones that are
    /// `arrayOk: true`) are available. Anything contained in tag `<extra>` is displayed in the
    /// secondary box, for example "<extra>{fullData.name}</extra>". To hide the secondary box
    /// completely, use an empty tag `<extra></extra>`.
    pub fn hover_template(mut self, hover_template: &str) -> Box<Self> {
        self.hover_template = Some(Dim::Scalar(hover_template.to_owned()));
        Box::new(self)
    }

    /// Template string used for rendering the information that appear on hover box. Note that this
    /// will override `HoverInfo`. Variables are inserted using %{variable}, for example "y: %{y}".
    /// Numbers are formatted using d3-format's syntax %{variable:d3-format}, for example
    /// "Price: %{y:$.2f}".
    /// https://github.com/d3/d3-3.x-api-reference/blob/master/Formatting.md#d3_format for details
    /// on the formatting syntax. Dates are formatted using d3-time-format's syntax
    /// %{variable|d3-time-format}, for example "Day: %{2019-01-01|%A}".
    /// https://github.com/d3/d3-3.x-api-reference/blob/master/Time-Formatting.md#format for details
    /// on the date formatting syntax. The variables available in `hovertemplate` are the ones
    /// emitted as event data described at this link https://plotly.com/javascript/plotlyjs-events/#event-data.
    /// Additionally, every attributes that can be specified per-point (the ones that are
    /// `arrayOk: true`) are available. Anything contained in tag `<extra>` is displayed in the
    /// secondary box, for example "<extra>{fullData.name}</extra>". To hide the secondary box
    /// completely, use an empty tag `<extra></extra>`.
    pub fn hover_template_array<S: AsRef<str>>(mut self, hover_template: Vec<S>) -> Box<Self> {
        let hover_template = private::owned_string_vector(hover_template);
        self.hover_template = Some(Dim::Vector(hover_template));
        Box::new(self)
    }

    /// Assigns extra meta information associated with this trace that can be used in various text
    /// attributes. Attributes such as trace `name`, graph, axis and colorbar `title.text`,
    /// annotation `text` `rangeselector`, `updatemenues` and `sliders` `label` text all support
    /// `meta`. To access the trace `meta` values in an attribute in the same trace, simply use
    /// `%{meta[i]}` where `i` is the index or key of the `meta` item in question. To access trace
    /// `meta` in layout attributes, use `%{data[n[.meta[i]}` where `i` is the index or key of the
    /// `meta` and `n` is the trace index.
    pub fn meta<C: NumOrString>(mut self, meta: C) -> Box<Self> {
        self.meta = Some(meta.to_num_or_string());
        Box::new(self)
    }

    /// Assigns extra data each datum. This may be useful when listening to hover, click and
    /// selection events. Note that, "scatter" traces also appends customdata items in the markers
    /// DOM elements
    pub fn custom_data<C: NumOrString>(mut self, custom_data: Vec<C>) -> Box<Self> {
        let wrapped = to_num_or_string_wrapper(custom_data);
        self.custom_data = Some(wrapped);
        Box::new(self)
    }

    /// Only relevant when `stackgroup` is used, and only the first `orientation` found in the
    /// `stackgroup` will be used - including if `visible` is "legendonly" but not if it is `false`.
    /// Sets the stacking direction. With "v" ("h"), the y (x) values of subsequent traces are
    /// added. Also affects the default value of `fill`.
    pub fn orientation(mut self, orientation: Orientation) -> Box<Self> {
        self.orientation = Some(orientation);
        Box::new(self)
    }

    /// Only relevant when `stackgroup` is used, and only the first `groupnorm` found in the
    /// `stackgroup` will be used - including if `visible` is "legendonly" but not if it is `false`.
    /// Sets the normalization for the sum of this `stackgroup`. With "fraction", the value of each
    /// trace at each location is divided by the sum of all trace values at that location. "percent"
    /// is the same but multiplied by 100 to show percentages. If there are multiple subplots, or
    /// multiple `stackgroup`s on one subplot, each will be normalized within its own set.
    pub fn group_norm(mut self, group_norm: GroupNorm) -> Box<Self> {
        self.group_norm = Some(group_norm);
        Box::new(self)
    }

    /// Array containing integer indices of selected points. Has an effect only for traces that
    /// support selections. Note that an empty array means an empty selection where the
    /// `unselected` are turned on for all points, whereas, any other non-array values means no
    /// selection all where the `selected` and `unselected` styles have no effect.
    pub fn selected_points(mut self, selected_points: Vec<u32>) -> Box<Self> {
        self.selected_points = Some(selected_points);
        Box::new(self)
    }

    /// Set several scatter traces (on the same subplot) to the same stackgroup in order to add
    /// their y values (or their x values if `orientation` is "h"). If blank or omitted this trace
    /// will not be stacked. Stacking also turns `fill` on by default, using "tonexty" ("tonextx")
    /// if `orientation` is "h" ("v") and sets the default `mode` to "lines" irrespective of point
    /// count. You can only stack on a numeric (linear or log) axis. Traces in a `stackgroup` will
    /// only fill to (or be filled to) other traces in the same group. With multiple `stackgroup`s
    /// or some traces stacked and some not, if fill-linked traces are not already consecutive, the
    /// later ones will be pushed down in the drawing order.
    pub fn stack_group(mut self, stack_group: &str) -> Box<Self> {
        self.stack_group = Some(stack_group.to_owned());
        Box::new(self)
    }

    /// Determines how points are displayed and joined.
    pub fn marker(mut self, marker: Marker) -> Box<Self> {
        self.marker = Some(marker);
        Box::new(self)
    }

    /// Line display properties.
    pub fn line(mut self, line: Line) -> Box<Self> {
        self.line = Some(line);
        Box::new(self)
    }

    /// Sets the text font.
    pub fn text_font(mut self, text_font: Font) -> Box<Self> {
        self.text_font = Some(text_font);
        Box::new(self)
    }

    /// Determines whether or not markers and text nodes are clipped about the subplot axes. To show
    /// markers and text nodes above axis lines and tick labels, make sure to set `xaxis.layer` and
    /// `yaxis.layer` to "below traces".
    pub fn clip_on_axis(mut self, clip_on_axis: bool) -> Box<Self> {
        self.clip_on_axis = Some(clip_on_axis);
        Box::new(self)
    }

    /// Determines whether or not gaps (i.e. {nan} or missing values) in the provided data arrays
    /// are connected.
    pub fn connect_gaps(mut self, connect_gaps: bool) -> Box<Self> {
        self.connect_gaps = Some(connect_gaps);
        Box::new(self)
    }

    /// Sets the area to fill with a solid color. Defaults to "none" unless this trace is stacked,
    /// then it gets "tonexty" ("tonextx") if `orientation` is "v" ("h") Use with `fillcolor` if not
    /// "none". "tozerox" and "tozeroy" fill to x=0 and y=0 respectively. "tonextx" and "tonexty"
    /// fill between the endpoints of this trace and the endpoints of the trace before it,
    /// connecting those endpoints with straight lines (to make a stacked area graph); if there is
    /// no trace before it, they behave like "tozerox" and "tozeroy". "toself" connects the
    /// endpoints of the trace (or each segment of the trace if it has gaps) into a closed shape.
    /// "tonext" fills the space between two traces if one completely encloses the other
    /// (eg consecutive contour lines), and behaves like "toself" if there is no trace before it.
    /// "tonext" should not be used if one trace does not enclose the other. Traces in a
    /// `stackgroup` will only fill to (or be filled to) other traces in the same group. With
    /// multiple `stackgroup`s or some traces stacked and some not, if fill-linked traces are not
    /// already consecutive, the later ones will be pushed down in the drawing order.
    pub fn fill(mut self, fill: Fill) -> Box<Self> {
        self.fill = Some(fill);
        Box::new(self)
    }

    /// Sets the fill color. Defaults to a half-transparent variant of the line color, marker color,
    /// or marker line color, whichever is available.
    pub fn fill_color<C: Color>(mut self, fill_color: C) -> Box<Self> {
        self.fill_color = Some(fill_color.to_color());
        Box::new(self)
    }

    /// Properties of label displayed on mouse hover.
    pub fn hover_label(mut self, hover_label: Label) -> Box<Self> {
        self.hover_label = Some(hover_label);
        Box::new(self)
    }

    /// Do the hover effects highlight individual points (markers or line points) or do they
    /// highlight filled regions? If the fill is "toself" or "tonext" and there are no markers or
    /// text, then the default is "fills", otherwise it is "points".
    pub fn hover_on(mut self, hover_on: &str) -> Box<Self> {
        self.hover_on = Some(hover_on.to_owned());
        Box::new(self)
    }

    /// Only relevant when `stack_group` is used, and only the first `stack_gaps` found in the
    /// `stackgroup` will be used - including if `visible` is set to `Visible::LegendOnly` but not
    /// if it is set to `Visible::False`.
    /// Determines how we handle locations at which other traces in this group have data but this
    /// one does not. With "infer zero" we insert a zero at these locations. With "interpolate" we
    /// linearly interpolate between existing values, and extrapolate a constant beyond the existing
    /// values.
    pub fn stack_gaps(mut self, stack_gaps: &str) -> Box<Self> {
        self.stack_gaps = Some(stack_gaps.to_owned());
        Box::new(self)
    }

    /// Assign an id to this trace, Use this to provide object constancy between traces during
    /// animations and transitions.
    pub fn uid(mut self, uid: &str) -> Box<Self> {
        self.uid = Some(uid.to_owned());
        Box::new(self)
    }
}

impl<Theta, R> Trace for ScatterPolar<Theta, R>
where
    Theta: Serialize + Clone + 'static,
    R: Serialize + Clone + 'static,
{
    fn serialize(&self) -> String {
        serde_json::to_string(&self).unwrap()
    }
}