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#ifndef SRC_TINT_LANG_WGSL_READER_PROGRAM_TO_IR_IR_PROGRAM_TEST_H_
#define SRC_TINT_LANG_WGSL_READER_PROGRAM_TO_IR_IR_PROGRAM_TEST_H_

#include <string>
#include <utility>

#include "gtest/gtest.h"
#include "src/tint/lang/core/ir/disassembler.h"
#include "src/tint/lang/core/ir/validator.h"
#include "src/tint/lang/wgsl/program/program_builder.h"
#include "src/tint/lang/wgsl/reader/lower/lower.h"
#include "src/tint/lang/wgsl/reader/program_to_ir/program_to_ir.h"
#include "src/tint/lang/wgsl/reader/reader.h"
#include "src/tint/lang/wgsl/resolver/resolve.h"

namespace tint::wgsl::helpers {

/// Helper class for testing IR with an input WGSL program.
template <typename BASE>
class IRProgramTestBase : public BASE, public ProgramBuilder {
  public:
    IRProgramTestBase() = default;
    ~IRProgramTestBase() override = default;

    /// Builds a core-dialect module from this ProgramBuilder.
    /// @returns the generated core-dialect module
    Result<core::ir::Module> Build() {
        Program program{resolver::Resolve(*this)};
        if (!program.IsValid()) {
            return Failure{program.Diagnostics().Str()};
        }

        TINT_CHECK_RESULT_UNWRAP(result, wgsl::reader::ProgramToIR(program));

        // WGSL-dialect -> core-dialect
        TINT_CHECK_RESULT(wgsl::reader::Lower(result));

        TINT_CHECK_RESULT(core::ir::Validate(result));
        return result;
    }

    /// Build the module from the given WGSL.
    /// @param wgsl the WGSL to convert to IR
    /// @returns the generated module
    Result<core::ir::Module> Build(std::string wgsl) {
        Source::File file("test.wgsl", std::move(wgsl));
        wgsl::reader::Options options{
            .allowed_features = wgsl::AllowedFeatures::Everything(),
        };
        TINT_CHECK_RESULT_UNWRAP(result, wgsl::reader::WgslToIR(&file, options));
        TINT_CHECK_RESULT(core::ir::Validate(result));

        return result;
    }

    /// Helper to disassemble a module into a string representation
    /// @param m the module to disassemble.
    /// @returns the string representation
    std::string Dis(core::ir::Module& m) { return core::ir::Disassembler(m).Plain(); }
};

using IRProgramTest = IRProgramTestBase<testing::Test>;

template <typename T>
using IRProgramTestParam = IRProgramTestBase<testing::TestWithParam<T>>;

}  // namespace tint::wgsl::helpers

#endif  // SRC_TINT_LANG_WGSL_READER_PROGRAM_TO_IR_IR_PROGRAM_TEST_H_
