#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/PropertyKey.h>
#include <LibJS/Runtime/Value.h>
#include <LibJS/Runtime/ValueInlines.h>
#include <LibWeb/Bindings/CSSImportRule.h>
#include <LibWeb/Bindings/CSSRule.h>
#include <LibWeb/Bindings/ExceptionOrUtils.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/CSS/CSSImportRule.h>
#include <LibWeb/CSS/CSSStyleSheet.h>
#include <LibWeb/CSS/MediaList.h>
#include <LibWeb/WebIDL/AbstractOperations.h>
#include <LibWeb/WebIDL/Tracing.h>

namespace Web::Bindings {

void CSSImportRuleConstructor::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<CSSRulePrototype>(realm, "CSSRule"_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, "CSSImportRule"_utf16), JS::Attribute::Configurable);
    object.define_direct_property(vm.names.prototype, &ensure_web_prototype<CSSImportRulePrototype>(realm, "CSSImportRule"_fly_string), 0);
}

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

void CSSImportRulePrototype::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<CSSRulePrototype>(realm, "CSSRule"_fly_string) });

    auto href_id = "href"_utf16_fly_string;
    auto native_href_getter = JS::NativeFunction::create(realm, href_getter, 0, href_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_href_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto href_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(href_id, native_href_getter, native_href_setter, href_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.
    auto media_id = "media"_utf16_fly_string;
    auto native_media_getter = JS::NativeFunction::create(realm, media_getter, 0, media_id, &realm, "get"sv);
    auto native_media_setter = JS::NativeFunction::create(realm, media_setter, 1, media_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto media_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(media_id, native_media_getter, native_media_setter, media_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.
    auto style_sheet_id = "styleSheet"_utf16_fly_string;
    auto native_style_sheet_getter = JS::NativeFunction::create(realm, style_sheet_getter, 0, style_sheet_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_style_sheet_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto style_sheet_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(style_sheet_id, native_style_sheet_getter, native_style_sheet_setter, style_sheet_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.
    auto layer_name_id = "layerName"_utf16_fly_string;
    auto native_layer_name_getter = JS::NativeFunction::create(realm, layer_name_getter, 0, layer_name_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_layer_name_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto layer_name_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(layer_name_id, native_layer_name_getter, native_layer_name_setter, layer_name_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.
    auto supports_text_id = "supportsText"_utf16_fly_string;
    auto native_supports_text_getter = JS::NativeFunction::create(realm, supports_text_getter, 0, supports_text_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_supports_text_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto supports_text_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(supports_text_id, native_supports_text_getter, native_supports_text_setter, supports_text_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_direct_property(vm.well_known_symbol_to_string_tag(), JS::PrimitiveString::create(vm, "CSSImportRule"_utf16), JS::Attribute::Configurable);
}

void CSSImportRulePrototype::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<CSS::CSSImportRule*> impl_from(JS::VM& vm, JS::Value js_value)
{

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

[[maybe_unused]] static JS::ThrowCompletionOr<CSS::CSSImportRule*> 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(CSSImportRulePrototype::href_getter)
{
    WebIDL::log_trace(vm, "CSSImportRulePrototype::href_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->href(); }));

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

JS_DEFINE_NATIVE_FUNCTION(CSSImportRulePrototype::media_getter)
{
    WebIDL::log_trace(vm, "CSSImportRulePrototype::media_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->media(); }));

    return JS::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(CSSImportRulePrototype::style_sheet_getter)
{
    WebIDL::log_trace(vm, "CSSImportRulePrototype::style_sheet_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->style_sheet_for_bindings(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R)
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(JS::Value(R));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(CSSImportRulePrototype::layer_name_getter)
{
    WebIDL::log_trace(vm, "CSSImportRulePrototype::layer_name_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->layer_name(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R.has_value())
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(WebIDL::primitive_string_from_string(vm, R.value()));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(CSSImportRulePrototype::supports_text_getter)
{
    WebIDL::log_trace(vm, "CSSImportRulePrototype::supports_text_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->supports_text(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R.has_value())
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(WebIDL::primitive_string_from_string(vm, R.value()));
    }();
}

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

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] CSS::CSSImportRule* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    // 8. If attribute is declared with a [PutForwards] extended attribute, then:

    // 1. Let Q be ? Get(jsValue, id).
    auto receiver_value = TRY(idl_object->get("media"_utf16_fly_string));

    // 2. If Q is not an Object, then throw a TypeError.
    if (!receiver_value.is_object())
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObject, receiver_value);
    auto& receiver = receiver_value.as_object();

    // 3. Let forwardId be the identifier argument of the [PutForwards] extended attribute.
    auto forward_id = "mediaText"_utf16_fly_string;

    // 4. Perform ? Set(Q, forwardId, V, false).
    TRY(receiver.set(JS::PropertyKey { forward_id, JS::PropertyKey::StringMayBeNumber::No }, V, JS::Object::ShouldThrowExceptions::No));

    // 5. Return undefined.
    return JS::js_undefined();
}

} // namespace Web::Bindings