#include <LibJS/Runtime/Array.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/ResizeObserverEntry.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/Geometry/DOMRectReadOnly.h>
#include <LibWeb/ResizeObserver/ResizeObserverEntry.h>
#include <LibWeb/ResizeObserver/ResizeObserverSize.h>
#include <LibWeb/WebIDL/Tracing.h>

namespace Web::Bindings {

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

    
    object.define_direct_property(vm.names.length, JS::Value(0), JS::Attribute::Configurable);
    object.define_direct_property(vm.names.name, JS::PrimitiveString::create(vm, "ResizeObserverEntry"_utf16), JS::Attribute::Configurable);
    object.define_direct_property(vm.names.prototype, &ensure_web_prototype<ResizeObserverEntryPrototype>(realm, "ResizeObserverEntry"_fly_string), 0);
}

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

void ResizeObserverEntryPrototype::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(realm.intrinsics().object_prototype());

    auto target_id = "target"_utf16_fly_string;
    auto native_target_getter = JS::NativeFunction::create(realm, target_getter, 0, target_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_target_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto target_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(target_id, native_target_getter, native_target_setter, target_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 content_rect_id = "contentRect"_utf16_fly_string;
    auto native_content_rect_getter = JS::NativeFunction::create(realm, content_rect_getter, 0, content_rect_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_content_rect_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto content_rect_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(content_rect_id, native_content_rect_getter, native_content_rect_setter, content_rect_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 border_box_size_id = "borderBoxSize"_utf16_fly_string;
    auto native_border_box_size_getter = JS::NativeFunction::create(realm, border_box_size_getter, 0, border_box_size_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_border_box_size_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto border_box_size_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(border_box_size_id, native_border_box_size_getter, native_border_box_size_setter, border_box_size_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 content_box_size_id = "contentBoxSize"_utf16_fly_string;
    auto native_content_box_size_getter = JS::NativeFunction::create(realm, content_box_size_getter, 0, content_box_size_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_content_box_size_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto content_box_size_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(content_box_size_id, native_content_box_size_getter, native_content_box_size_setter, content_box_size_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 device_pixel_content_box_size_id = "devicePixelContentBoxSize"_utf16_fly_string;
    auto native_device_pixel_content_box_size_getter = JS::NativeFunction::create(realm, device_pixel_content_box_size_getter, 0, device_pixel_content_box_size_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_device_pixel_content_box_size_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto device_pixel_content_box_size_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(device_pixel_content_box_size_id, native_device_pixel_content_box_size_getter, native_device_pixel_content_box_size_setter, device_pixel_content_box_size_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, "ResizeObserverEntry"_utf16), JS::Attribute::Configurable);
}

void ResizeObserverEntryPrototype::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<ResizeObserver::ResizeObserverEntry*> impl_from(JS::VM& vm, JS::Value js_value)
{

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

[[maybe_unused]] static JS::ThrowCompletionOr<ResizeObserver::ResizeObserverEntry*> 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(ResizeObserverEntryPrototype::target_getter)
{
    WebIDL::log_trace(vm, "ResizeObserverEntryPrototype::target_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->target(); }));

    return JS::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(ResizeObserverEntryPrototype::content_rect_getter)
{
    WebIDL::log_trace(vm, "ResizeObserverEntryPrototype::content_rect_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->content_rect(); }));

    return JS::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(ResizeObserverEntryPrototype::border_box_size_getter)
{
    WebIDL::log_trace(vm, "ResizeObserverEntryPrototype::border_box_size_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->border_box_size(); }));

    return [&]() -> JS::Value {
        // An IDL sequence<T> value S is converted to a JavaScript value as follows:
        // 1. Let n be the length of S.
        auto sequence_length = R.size();

        // 2. Let A be a new Array object created as if by the expression [].
        auto sequence_array = MUST(JS::Array::create(realm, sequence_length));

        // 3. Initialize i to be 0.
        // 4. While i < n:
        for (size_t sequence_index = 0; sequence_index < sequence_length; ++sequence_index) {
            // 1. Let V be the value in S at index i.
            auto& sequence_element = R.at(sequence_index);

            // 2. Let E be the result of converting V to a JavaScript value.
            JS::Value js_sequence_element = JS::Value(sequence_element);

            // 3. Let P be the result of calling ! ToString(i).
            // 4. Perform ! CreateDataPropertyOrThrow(A, P, E).
            MUST(sequence_array->create_data_property(JS::PropertyKey { sequence_index }, js_sequence_element));

            // 5. Set i to i + 1.
        }

        MUST(sequence_array->set_integrity_level(JS::Object::IntegrityLevel::Frozen));

        // 5. Return A.
        return sequence_array;
    }();
}

JS_DEFINE_NATIVE_FUNCTION(ResizeObserverEntryPrototype::content_box_size_getter)
{
    WebIDL::log_trace(vm, "ResizeObserverEntryPrototype::content_box_size_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->content_box_size(); }));

    return [&]() -> JS::Value {
        // An IDL sequence<T> value S is converted to a JavaScript value as follows:
        // 1. Let n be the length of S.
        auto sequence_length = R.size();

        // 2. Let A be a new Array object created as if by the expression [].
        auto sequence_array = MUST(JS::Array::create(realm, sequence_length));

        // 3. Initialize i to be 0.
        // 4. While i < n:
        for (size_t sequence_index = 0; sequence_index < sequence_length; ++sequence_index) {
            // 1. Let V be the value in S at index i.
            auto& sequence_element = R.at(sequence_index);

            // 2. Let E be the result of converting V to a JavaScript value.
            JS::Value js_sequence_element = JS::Value(sequence_element);

            // 3. Let P be the result of calling ! ToString(i).
            // 4. Perform ! CreateDataPropertyOrThrow(A, P, E).
            MUST(sequence_array->create_data_property(JS::PropertyKey { sequence_index }, js_sequence_element));

            // 5. Set i to i + 1.
        }

        MUST(sequence_array->set_integrity_level(JS::Object::IntegrityLevel::Frozen));

        // 5. Return A.
        return sequence_array;
    }();
}

JS_DEFINE_NATIVE_FUNCTION(ResizeObserverEntryPrototype::device_pixel_content_box_size_getter)
{
    WebIDL::log_trace(vm, "ResizeObserverEntryPrototype::device_pixel_content_box_size_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->device_pixel_content_box_size(); }));

    return [&]() -> JS::Value {
        // An IDL sequence<T> value S is converted to a JavaScript value as follows:
        // 1. Let n be the length of S.
        auto sequence_length = R.size();

        // 2. Let A be a new Array object created as if by the expression [].
        auto sequence_array = MUST(JS::Array::create(realm, sequence_length));

        // 3. Initialize i to be 0.
        // 4. While i < n:
        for (size_t sequence_index = 0; sequence_index < sequence_length; ++sequence_index) {
            // 1. Let V be the value in S at index i.
            auto& sequence_element = R.at(sequence_index);

            // 2. Let E be the result of converting V to a JavaScript value.
            JS::Value js_sequence_element = JS::Value(sequence_element);

            // 3. Let P be the result of calling ! ToString(i).
            // 4. Perform ! CreateDataPropertyOrThrow(A, P, E).
            MUST(sequence_array->create_data_property(JS::PropertyKey { sequence_index }, js_sequence_element));

            // 5. Set i to i + 1.
        }

        MUST(sequence_array->set_integrity_level(JS::Object::IntegrityLevel::Frozen));

        // 5. Return A.
        return sequence_array;
    }();
}

} // namespace Web::Bindings