use nom::branch::alt;
use nom::bytes::complete::tag;
use nom::character::complete::anychar;
use nom::character::complete::digit1;
use nom::character::complete::line_ending;
use nom::character::complete::one_of;
use nom::combinator::not;
use nom::combinator::recognize;
use nom::multi::many1;
use nom::sequence::tuple;

use super::error::Res;
use super::token::ListItem;
use super::token::PlainList;
use super::Context;

pub fn plain_list<'r, 's>(context: Context<'r, 's>, i: &'s str) -> Res<&'s str, PlainList<'s>> {
    // todo
    todo!()
}

fn item<'r, 's>(context: Context<'r, 's>, i: &'s str) -> Res<&'s str, ListItem<'s>> {
    // todo
    todo!()
}

fn counter<'s>(i: &'s str) -> Res<&'s str, &'s str> {
    alt((recognize(one_of("abcdefghijklmnopqrstuvwxyz")), digit1))(i)
}

fn bullet<'s>(i: &'s str) -> Res<&'s str, &'s str> {
    alt((
        tag("*"),
        tag("-"),
        tag("+"),
        recognize(tuple((counter, alt((tag("."), tag(")")))))),
    ))(i)
}

fn counter_set<'s>(i: &'s str) -> Res<&'s str, &'s str> {
    recognize(tuple((tag("[@"), counter, tag("]"))))(i)
}

fn check_box<'s>(i: &'s str) -> Res<&'s str, &'s str> {
    recognize(alt((tag("[ ]"), tag("[X]"), tag("[-]"))))(i)
}

fn item_tag<'s>(i: &'s str) -> Res<&'s str, &'s str> {
    recognize(tuple((tag_text, tag_separator)))(i)
}

fn tag_text<'s>(i: &'s str) -> Res<&'s str, &'s str> {
    recognize(many1(tag_text_character))(i)
}

fn tag_text_character<'s>(i: &'s str) -> Res<&'s str, &'s str> {
    not(alt((tag_separator, line_ending)))(i)?;
    recognize(anychar)(i)
}

fn tag_separator<'s>(i: &'s str) -> Res<&'s str, &'s str> {
    tag(" :: ")(i)
}