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#include "src/tint/cmd/fuzz/wgsl/fuzz.h"
#include "src/tint/lang/wgsl/ast/transform/clamp_frag_depth.h"
#include "src/tint/lang/wgsl/program/program.h"

namespace tint::ast::transform {
namespace {

bool CanRun(const ClampFragDepth::Config& config) {
    if (config.offsets) {
        if (config.offsets->min >= config.offsets->max) {
            return false;  // member offset collision / non-ascending
        }
        if ((config.offsets->min & 3) != 0 || (config.offsets->max & 3) != 0) {
            return false;  // Offsets need 4-byte alignment.
        }
    }
    return true;
}

void ClampFragDepthFuzzer(const Program& program, const ClampFragDepth::Config& config) {
    if (!CanRun(config)) {
        return;
    }

    DataMap inputs;
    inputs.Add<ClampFragDepth::Config>(std::move(config));

    DataMap outputs;
    if (auto result = ClampFragDepth{}.Apply(program, inputs, outputs)) {
        if (!result->IsValid()) {
            TINT_ICE() << "ClampFragDepth returned invalid program:\n"
                       << Program::printer(*result) << "\n"
                       << result->Diagnostics();
        }
    }
}

}  // namespace
}  // namespace tint::ast::transform

TINT_WGSL_PROGRAM_FUZZER(tint::ast::transform::ClampFragDepthFuzzer);