use anyhow::{anyhow, bail};

use crate::get_attribute;

use self::tileset::TileSetElement;

pub mod map;

pub mod property;

pub mod tileset;

pub mod image;

pub mod data;

pub mod layer;
pub mod layer_tile;

pub(crate) mod macros;

pub mod wangset;

pub fn parse_map(input: &str) -> anyhow::Result<map::Map> {
    let doc = roxmltree::Document::parse(input).unwrap();
    map::Map::from_xml(doc)
}

pub fn parse_tileset(input: &str) -> anyhow::Result<tileset::TileSet> {
    let doc = roxmltree::Document::parse(input).unwrap();
    let elem = doc.root_element();
    tileset::TileSet::from_xml(&elem)
}

pub fn get_tile_set_elements_from_map(input: &str) -> anyhow::Result<Vec<tileset::TileSetElement>> {
    let doc = roxmltree::Document::parse(input).unwrap();
    let node = doc.root_element();
    let mut tilesets = Vec::new();
    for tileset_node in node.children().filter(|n| n.has_tag_name("tileset")) {
        tilesets.push(TileSetElement::from_xml(tileset_node)?);
    }
    Ok(tilesets)
}

/// The Tiled version used to save the file (since Tiled 1.0.1). May be a date (for snapshot builds). (optional)
fn parse_tiled_version(node: &roxmltree::Node) -> anyhow::Result<Option<String>> {
    if !node.is_root() {
        bail!("not a root node")
    }

    Ok(match get_attribute!(node, "tiledversion") {
        Ok(v) => Some(v.to_owned()),
        Err(_) => None,
    })
}