#include <AK/String.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/Value.h>
#include <LibJS/Runtime/ValueInlines.h>
#include <LibWeb/Bindings/ExceptionOrUtils.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/Bindings/TextEvent.h>
#include <LibWeb/Bindings/UIEvent.h>
#include <LibWeb/HTML/WindowProxy.h>
#include <LibWeb/UIEvents/TextEvent.h>
#include <LibWeb/WebIDL/AbstractOperations.h>
#include <LibWeb/WebIDL/Tracing.h>

namespace Web::Bindings {

void TextEventConstructor::initialize(JS::Realm& realm, JS::NativeFunction& object)
{
    auto& vm = realm.vm();
    [[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable;

    object.set_prototype(&ensure_web_constructor<UIEventPrototype>(realm, "UIEvent"_fly_string));
    object.define_direct_property(vm.names.length, JS::Value(0), JS::Attribute::Configurable);
    object.define_direct_property(vm.names.name, JS::PrimitiveString::create(vm, "TextEvent"_utf16), JS::Attribute::Configurable);
    object.define_direct_property(vm.names.prototype, &ensure_web_prototype<TextEventPrototype>(realm, "TextEvent"_fly_string), 0);
}

JS::ThrowCompletionOr<GC::Ref<JS::Object>> TextEventConstructor::construct([[maybe_unused]] InterfaceConstructor& constructor, [[maybe_unused]] JS::FunctionObject& new_target)
{
    WebIDL::log_trace(constructor.vm(), "TextEventConstructor::construct");
    return constructor.vm().throw_completion<JS::TypeError>(JS::ErrorType::NotAConstructor, "TextEvent");
}

void TextEventPrototype::initialize(JS::Realm& realm, JS::Object& object)
{
    [[maybe_unused]] auto& vm = realm.vm();
    [[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable | JS::Attribute::Configurable | JS::Attribute::Writable;

    object.set_prototype(GC::Ref { ensure_web_prototype<UIEventPrototype>(realm, "UIEvent"_fly_string) });

    auto data_id = "data"_utf16_fly_string;
    auto native_data_getter = JS::NativeFunction::create(realm, data_getter, 0, data_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_data_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto data_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(data_id, native_data_getter, native_data_setter, data_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    object.define_native_function(realm, "initTextEvent"_utf16_fly_string, init_text_event, 1, default_attributes);

    object.define_direct_property(vm.well_known_symbol_to_string_tag(), JS::PrimitiveString::create(vm, "TextEvent"_utf16), JS::Attribute::Configurable);
}

void TextEventPrototype::define_unforgeable_attributes(JS::Realm& realm, [[maybe_unused]] JS::Object& object)
{
    [[maybe_unused]] auto& vm = realm.vm();
    [[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable;
}

[[maybe_unused]] static JS::ThrowCompletionOr<UIEvents::TextEvent*> impl_from(JS::VM& vm, JS::Value js_value)
{

    if (auto impl = js_value.as_if<UIEvents::TextEvent>())
        return impl.ptr();
    return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "TextEvent");
}

[[maybe_unused]] static JS::ThrowCompletionOr<UIEvents::TextEvent*> impl_from(JS::VM& vm)
{
    auto this_value = vm.this_value();
    if (this_value.is_nullish())
        this_value = &vm.current_realm()->global_object();
    return impl_from(vm, this_value);
}

JS_DEFINE_NATIVE_FUNCTION(TextEventPrototype::data_getter)
{
    WebIDL::log_trace(vm, "TextEventPrototype::data_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->data(); }));

    return WebIDL::primitive_string_from_string(vm, R);
}

JS_DEFINE_NATIVE_FUNCTION(TextEventPrototype::init_text_event)
{
    WebIDL::log_trace(vm, "TextEventPrototype::init_text_event");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] UIEvents::TextEvent* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "initTextEvent");

    auto arg0 = vm.argument(0);
    auto type = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<String> {
        return TRY(WebIDL::to_string(vm, arg0));
    }(); }));

    auto arg1 = vm.argument(1);
    bool bubbles = false;
    if (!arg1.is_undefined())
        bubbles = TRY(throw_dom_exception_if_needed(vm, [&] { return arg1.to_boolean(); }));

    auto arg2 = vm.argument(2);
    bool cancelable = false;
    if (!arg2.is_undefined())
        cancelable = TRY(throw_dom_exception_if_needed(vm, [&] { return arg2.to_boolean(); }));

    auto arg3 = vm.argument(3);
    GC::Ptr<HTML::WindowProxy> view = nullptr;
    if (!arg3.is_undefined())
        view = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ptr<HTML::WindowProxy>> {
        GC::Ptr<HTML::WindowProxy> value;

        if (!arg3.is_nullish()) {

            value = TRY([&]() -> JS::ThrowCompletionOr<GC::Ref<HTML::WindowProxy>> {
        if (auto impl = arg3.as_if<HTML::WindowProxy>())
            return *impl;
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "WindowProxy");
    }());
        }
        return value;
    }(); }));

    auto arg4 = vm.argument(4);
    String data = "undefined"_string;
    if (!arg4.is_undefined())
        data = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<String> {
        return TRY(WebIDL::to_string(vm, arg4));
    }(); }));

    [[maybe_unused]] auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->init_text_event(type, bubbles, cancelable, view, data); }));
    return JS::js_undefined();
}

} // namespace Web::Bindings