/*
 * Copyright (c) 2024 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "WGSLShaderModule.h"

#include "WGSL.h"
#include <wtf/TZoneMallocInlines.h>

namespace WGSL {

WTF_MAKE_TZONE_ALLOCATED_IMPL(ShaderModule);

std::optional<Error> ShaderModule::validateOverrides(const HashMap<String, ConstantValue>& constantValues)
{
    for (const auto& [expression, validators] : m_overrideValidations) {
        auto maybeValue = evaluate(*expression, constantValues);
        if (!maybeValue)
            return { Error("failed to evaluate override expression"_s, expression->span()) };

        for (const auto& validator : validators) {
            if (auto maybeError = validator(*maybeValue))
                return { Error(*maybeError, expression->span()) };
        }
    }
    for (const auto& validator : m_finalOverrideValidations) {
        if (auto maybeError = validator())
            return maybeError;
    }
    return std::nullopt;
}

} // namespace WGSL