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use crate::{MathElement, MathIdentifier, MathML};
use std::{
    collections::BTreeMap,
    fmt::{Debug, Display, Formatter},
};
mod constructors;
mod display;

/// The [`<math>`](https://developer.mozilla.org/en-US/docs/Web/MathML/Element/math) element is the top-level MathML element,
/// used to write a single mathematical formula.
///
/// It can be placed in HTML content where flow content is permitted.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct MathRoot {
    children: Vec<MathML>,
    attributes: BTreeMap<String, String>,
}

/// Mark a function with arguments.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct MathFunction {
    name: String,
    body: Vec<MathML>,
}

/// The [`<mrow>`](https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mrow) element is used to group sub-expressions,
/// which usually contain one or more operators with their respective operands, such as `<mi>` and `<mn>`.
///
/// This element renders as a horizontal row containing its arguments.
///
/// When writing a MathML expression, you should group elements within an `<mrow>` in the same way as they are grouped in the mathematical interpretation of the expression.
///
/// Proper grouping helps the rendering of the expression in several ways:
///
/// - It can improve the display by possibly affecting spacing and preventing line breaks.
/// - It simplifies the interpretation of the expression by automated systems such as computer algebra systems and audio renderers.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct MathRow {
    grouped: bool,
    children: Vec<MathML>,
}

/// The [`<mphantom>`](https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mphantom) element is rendered invisibly,
/// but dimensions such as height, width, and baseline position, are still kept.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct MathPhantom {
    inner: MathML,
}

/// The [`<mspace>`](https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mspace) element is used to insert space characters into a mathematical formula.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct MathStyle {
    base: MathML,
    attributes: BTreeMap<String, String>,
}

/// The [`<mtable>`](https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mtable) element allows you to create tables or matrices.
///
/// Its children are `<mtr>` elements, representing rows.
///
/// Each of them having `<mtd>` elements as its children, representing cells.
///
/// These elements are similar to `<table>`, `<tr>` and `<td>` elements of HTML.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct MathTable {
    stream: Vec<MathML>,
    attributes: BTreeMap<String, String>,
}