//! Navigator backend for web

use std::collections::HashMap;
use web_sys::{window};
use wasm_bindgen::JsCast;
use ruffle_core::backend::navigator::{NavigatorBackend, NavigationMethod};

pub struct WebNavigatorBackend {

}

impl WebNavigatorBackend {
    pub fn new() -> Self {
        WebNavigatorBackend {

        }
    }
}

impl NavigatorBackend for WebNavigatorBackend {
    fn navigate_to_url(&self, url: String, window_spec: Option<String>, vars_method: Option<(NavigationMethod, HashMap<String, String>)>) {
        if let Some(window) = window() {
            //TODO: Should we return a result for failed opens? Does Flash care?
            #[allow(unused_must_use)]
            match (vars_method, window_spec) {
                (Some((navmethod, formvars)), window_spec) => {
                    let document = match window.document() {
                        Some(document) => document,
                        None => return
                    };

                    let form = document.create_element("form").unwrap().dyn_into::<web_sys::HtmlFormElement>().unwrap();

                    form.set_attribute("method", match navmethod {
                        NavigationMethod::GET => "get",
                        NavigationMethod::POST => "post"
                    });

                    form.set_attribute("action", &url);

                    if let Some(target) = window_spec {
                        form.set_attribute("target", &target);
                    }

                    for (k, v) in formvars.iter() {
                        let hidden = document.create_element("hidden").unwrap();

                        hidden.set_attribute("type", "hidden");
                        hidden.set_attribute("name", k);
                        hidden.set_attribute("value", v);

                        form.append_child(&hidden);
                    }

                    document.body().unwrap().append_child(&form);
                    form.submit();
                },
                (_, Some(ref window_name)) if window_name != "" => { window.open_with_url_and_target(&url, window_name); },
                _ => { window.location().assign(&url); }
            };
        }
    }
}