extern crate xml_oxide;

use xml_oxide::{sax::parser::Parser, sax::Event};

use std::char;

// let mut my_sax_handler = MySaxHandler {
//     counter: 0,
//     end_counter: 0,
//     char_counter: 0,
// };
// {
//     let mut sax_parser = SaxParser::new();
//     sax_parser.set_content_handler(&mut my_sax_handler);
//     sax_parser.parse(&mut f);
// }
// println!("START EVENT COUNT:{}", my_sax_handler.counter);
// println!("END EVENT COUNT:{}", my_sax_handler.end_counter);
// println!("TOTAL CHARS:{}", my_sax_handler.char_counter);

struct MyCollectorSaxHandler {
    start_counter: usize,
    end_counter: usize,
    start_el_name_vec: Vec<String>,
    end_el_name_vec: Vec<String>,
    // characters should be collected because SAX parser can send them splitted for various reasons.
    characters_collected_vec: Vec<String>,
    characters_buf: String,
    comments_buf: String,
}

fn collect_with_parser<R: std::io::Read>(f: R) -> MyCollectorSaxHandler {
    let mut data = MyCollectorSaxHandler {
        start_counter: 0,
        end_counter: 0,
        start_el_name_vec: Vec::new(),
        end_el_name_vec: Vec::new(),
        characters_collected_vec: Vec::new(),
        characters_buf: String::new(),
        comments_buf: String::new(),
    };

    let mut p = Parser::from_reader(f);

    loop {
        let res = p.read_event();
        // println!("{:?}", res);
        match res {
            Ok(event) => match event {
                Event::StartElement(el) => {
                    data.start_counter = data.start_counter + 1;
                    data.start_el_name_vec.push(el.name.to_owned());
                    for _attr in el.attributes() {}
                }
                Event::EndElement(el) => {
                    data.end_counter += 1;
                    data.end_el_name_vec.push(el.name.to_owned());
                }
                Event::EndDocument => {
                    break;
                }
                Event::Characters(chars) => {
                    data.characters_buf.push_str(chars);
                    data.characters_collected_vec.push(chars.to_string());
                }
                Event::Cdata(chars) => {
                    data.characters_buf.push_str(chars);
                }
                Event::Reference(reference) => {
                    println!(
                        "raw: {:?} , resolved {:?}",
                        reference.raw, reference.resolved
                    );
                    match reference.resolved {
                        Some(resolved) => {
                            data.characters_buf.push_str(resolved);
                        }
                        None => {}
                    }
                    // data.characters_buf.push_str(chars);
                }

                _ => {}
            },
            Err(_err) => {
                break;
            }
        }
    }

    data
}

#[test]
fn test_basic() {
    let s = String::from("<rootEl><value>5</value></rootEl>");

    let data = collect_with_parser(s.as_bytes());

    assert_eq!(data.start_counter, 2);
    assert_eq!(data.end_counter, 2);
    assert_eq!(data.start_el_name_vec.get(0).unwrap(), "rootEl");
    println!("{:?}", data.characters_collected_vec);
    assert_eq!(data.end_el_name_vec.get(0).unwrap(), "value");

    assert_eq!(data.characters_collected_vec.get(0).unwrap(), "5");
    // assert_eq!(my_sax_handler.end, );
}

#[test]
fn test_66_entity_ref() {
    let c = char::from_u32(60).unwrap();
    // println!("{}", c);
    assert_eq!(c, '<'); //8898  &#x022C2;    60 &#x0003C;

    let c2 = char::from_u32(u32::from_str_radix("0003C", 16).unwrap()).unwrap();
    // println!("{}", c2);
    assert_eq!(c2, '<'); //8898  &#x022C2;    60 &#x0003C;

    let s = String::from("<rootEl><value>1&lt;2&#60;3&#x0003C;4</value></rootEl>");

    let data = collect_with_parser(s.as_bytes());

    assert_eq!(data.characters_buf, "1<2<3<4");
    // assert_eq!(my_sax_handler.end, );
}

#[test]
fn test_18_cdata() {
    let s = String::from(
        "<rootEl>1&lt;2&#60;3&#x0003C;4<![CDATA[ \
         1&lt;2&#60;3&#x0003C;4]]><![CDATA[]]></rootEl>",
    );
    let data = collect_with_parser(s.as_bytes());

    println!("{}", data.characters_buf);
    assert_eq!(data.characters_buf, "1<2<3<4 1&lt;2&#60;3&#x0003C;4");
}

// comments should be ignored in content handler
#[test]
fn test_15_comment_1() {
    let s = String::from("<rootEl>comments<!--are ignored--><!---->.</rootEl>");
    let data = collect_with_parser(s.as_bytes());

    println!("{}", data.characters_collected_vec.get(0).unwrap());

    assert_eq!(data.characters_buf, "comments.");
    //dont depend on this functionality it depends on buffer size
    // assert_eq!(data.characters_collected_vec.get(0).unwrap(), "comments");
    // assert_eq!(data.characters_collected_vec.get(1).unwrap(), ".");
}

#[test]
#[should_panic]
fn test_15_comment_not_well_formed() {
    let s = String::from(
        "<rootEl>comments<!-- are not well formed with 3 \
         hyphen at the end unless it is empty---><!---->.</rootEl>",
    );
    let data = collect_with_parser(s.as_bytes());

    println!("{}", data.characters_buf);
    assert_eq!(data.characters_buf, "comments.");
}