/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

use dom::bindings::codegen::Bindings::HTMLSelectElementBinding;
use dom::bindings::codegen::Bindings::HTMLSelectElementBinding::HTMLSelectElementMethods;
use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast, NodeCast};
use dom::bindings::codegen::InheritTypes::{HTMLSelectElementDerived, HTMLFieldSetElementDerived};
use dom::bindings::codegen::UnionTypes::HTMLElementOrLong::HTMLElementOrLong;
use dom::bindings::codegen::UnionTypes::HTMLOptionElementOrHTMLOptGroupElement::HTMLOptionElementOrHTMLOptGroupElement;
use dom::bindings::js::{JSRef, Temporary};
use dom::bindings::utils::{Reflectable, Reflector};
use dom::document::Document;
use dom::element::{AttributeHandlers, Element, HTMLSelectElementTypeId};
use dom::eventtarget::{EventTarget, NodeTargetTypeId};
use dom::htmlelement::HTMLElement;
use dom::node::{DisabledStateHelpers, Node, NodeHelpers, ElementNodeTypeId, window_from_node};
use dom::validitystate::ValidityState;
use dom::virtualmethods::VirtualMethods;

use servo_util::atom::Atom;
use servo_util::str::DOMString;

#[deriving(Encodable)]
#[must_root]
pub struct HTMLSelectElement {
    pub htmlelement: HTMLElement
}

impl HTMLSelectElementDerived for EventTarget {
    fn is_htmlselectelement(&self) -> bool {
        self.type_id == NodeTargetTypeId(ElementNodeTypeId(HTMLSelectElementTypeId))
    }
}

impl HTMLSelectElement {
    pub fn new_inherited(localName: DOMString, document: JSRef<Document>) -> HTMLSelectElement {
        HTMLSelectElement {
            htmlelement: HTMLElement::new_inherited(HTMLSelectElementTypeId, localName, document)
        }
    }

    #[allow(unrooted_must_root)]
    pub fn new(localName: DOMString, document: JSRef<Document>) -> Temporary<HTMLSelectElement> {
        let element = HTMLSelectElement::new_inherited(localName, document);
        Node::reflect_node(box element, document, HTMLSelectElementBinding::Wrap)
    }
}

impl<'a> HTMLSelectElementMethods for JSRef<'a, HTMLSelectElement> {
    fn Validity(&self) -> Temporary<ValidityState> {
        let window = window_from_node(*self).root();
        ValidityState::new(*window)
    }

    // Note: this function currently only exists for test_union.html.
    fn Add(&self, _element: HTMLOptionElementOrHTMLOptGroupElement, _before: Option<HTMLElementOrLong>) {
    }

    // http://www.whatwg.org/html/#dom-fe-disabled
    make_bool_getter!(Disabled)

    // http://www.whatwg.org/html/#dom-fe-disabled
    fn SetDisabled(&self, disabled: bool) {
        let elem: JSRef<Element> = ElementCast::from_ref(*self);
        elem.set_bool_attribute("disabled", disabled)
    }
}

impl<'a> VirtualMethods for JSRef<'a, HTMLSelectElement> {
    fn super_type<'a>(&'a self) -> Option<&'a VirtualMethods> {
        let htmlelement: &JSRef<HTMLElement> = HTMLElementCast::from_borrowed_ref(self);
        Some(htmlelement as &VirtualMethods)
    }

    fn after_set_attr(&self, name: &Atom, value: DOMString) {
        match self.super_type() {
            Some(ref s) => s.after_set_attr(name, value.clone()),
            _ => (),
        }

        let node: JSRef<Node> = NodeCast::from_ref(*self);
        match name.as_slice() {
            "disabled" => {
                node.set_disabled_state(true);
                node.set_enabled_state(false);
            },
            _ => ()
        }
    }

    fn before_remove_attr(&self, name: &Atom, value: DOMString) {
        match self.super_type() {
            Some(ref s) => s.before_remove_attr(name, value),
            _ => (),
        }

        let node: JSRef<Node> = NodeCast::from_ref(*self);
        match name.as_slice() {
            "disabled" => {
                node.set_disabled_state(false);
                node.set_enabled_state(true);
                node.check_ancestors_disabled_state_for_form_control();
            },
            _ => ()
        }
    }

    fn bind_to_tree(&self, tree_in_doc: bool) {
        match self.super_type() {
            Some(ref s) => s.bind_to_tree(tree_in_doc),
            _ => (),
        }

        let node: JSRef<Node> = NodeCast::from_ref(*self);
        node.check_ancestors_disabled_state_for_form_control();
    }

    fn unbind_from_tree(&self, tree_in_doc: bool) {
        match self.super_type() {
            Some(ref s) => s.unbind_from_tree(tree_in_doc),
            _ => (),
        }

        let node: JSRef<Node> = NodeCast::from_ref(*self);
        if node.ancestors().any(|ancestor| ancestor.is_htmlfieldsetelement()) {
            node.check_ancestors_disabled_state_for_form_control();
        } else {
            node.check_disabled_attribute();
        }
    }
}

impl Reflectable for HTMLSelectElement {
    fn reflector<'a>(&'a self) -> &'a Reflector {
        self.htmlelement.reflector()
    }
}