/* 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 https://mozilla.org/MPL/2.0/. */

use std::default::Default;
use std::ptr::NonNull;

use dom_struct::dom_struct;
use js::jsapi::{JSObject, Value};
use script_bindings::conversions::SafeToJSValConvertible;
use script_bindings::reflector::DomObject;

use crate::dom::bindings::codegen::Bindings::DebuggerEventBinding::DebuggerEventMethods;
use crate::dom::bindings::codegen::Bindings::EventBinding::Event_Binding::EventMethods;
use crate::dom::bindings::reflector::reflect_dom_object;
use crate::dom::bindings::root::{DomRoot, MutNullableDom};
use crate::dom::event::Event;
use crate::dom::types::{GlobalScope, PipelineId};
use crate::script_runtime::CanGc;

#[dom_struct]
/// Event for Rust → JS calls in [`crate::dom::DebuggerGlobalScope`].
pub(crate) struct DebuggerEvent {
    event: Event,
    global: MutNullableDom<GlobalScope>,
    pipeline_id: MutNullableDom<PipelineId>,
}

impl DebuggerEvent {
    pub(crate) fn new(
        debugger_global: &GlobalScope,
        global: &GlobalScope,
        pipeline_id: &PipelineId,
        can_gc: CanGc,
    ) -> DomRoot<Self> {
        let result = Box::new(Self {
            event: Event::new_inherited(),
            global: Default::default(),
            pipeline_id: Default::default(),
        });
        // TODO: make these fields not optional somehow?
        result.global.set(Some(global));
        result.pipeline_id.set(Some(pipeline_id));

        result.event.init_event("addDebuggee".into(), false, false);

        reflect_dom_object(result, debugger_global, can_gc)
    }
}

impl DebuggerEventMethods<crate::DomTypeHolder> for DebuggerEvent {
    // check-tidy: no specs after this line
    fn Global(&self, r#cx: script_bindings::script_runtime::JSContext) -> NonNull<JSObject> {
        // Convert the debuggee global’s reflector to a Value, wrapping it from its originating realm (debuggee realm)
        // into the active realm (debugger realm) so that it can be passed across compartments.
        rooted!(in(*cx) let mut result: Value);
        self.global
            .get()
            .expect("Guaranteed by new")
            .reflector()
            .safe_to_jsval(cx, result.handle_mut());
        NonNull::new(result.to_object()).unwrap()
    }

    fn PipelineId(
        &self,
    ) -> DomRoot<<crate::DomTypeHolder as script_bindings::DomTypes>::PipelineId> {
        self.pipeline_id.get().expect("Guaranteed by new")
    }

    fn IsTrusted(&self) -> bool {
        self.event.IsTrusted()
    }
}