//! Turn a string of markdown into events.

use crate::content::document::document;
use crate::tokenizer::{Code, Event, Point};
use crate::util::codes::parse as parse_codes;
use crate::{Constructs, Options};
use std::collections::HashSet;

/// Information needed, in all content types, when parsing markdown.
///
/// Importantly, this contains a set of known definitions.
/// It also references the input value as [`Code`][]s.
#[derive(Debug)]
pub struct ParseState {
    pub constructs: Constructs,
    /// List of codes.
    pub codes: Vec<Code>,
    /// Set of defined identifiers.
    pub definitions: HashSet<String>,
}

/// Turn a string of markdown into events.
///
/// Passes the codes back so the compiler can access the source.
pub fn parse(value: &str, options: &Options) -> (Vec<Event>, ParseState) {
    let mut parse_state = ParseState {
        constructs: options.constructs.clone(),
        codes: parse_codes(value),
        definitions: HashSet::new(),
    };

    let events = document(
        &mut parse_state,
        Point {
            line: 1,
            column: 1,
            offset: 0,
        },
        0,
    );

    (events, parse_state)
}