#include <catch2/catch_test_macros.hpp>

#include <willow/IR/Context.h>
#include <willow/IR/Module.h>
#include <willow/IR/Verifier.h>
#include <willow/IR/Diagnostic.h>
#include <willow/IR/DiagnosticEngine.h>
#include <willow/IR/Function.h>

using namespace willow;

TEST_CASE("valid modules", "[verifier]") {
  WillowContext ctx;
  std::vector<Diagnostic> diags;
  DiagnosticEngine eng(
      [&](Diagnostic d) { diags.push_back(std::move(d)); });

  auto &m = *ctx.addModule("test");
  SECTION("empty module") {
    REQUIRE(succeeded(verifyModule(ctx, m, eng)));
    REQUIRE(diags.empty());
  }
}

TEST_CASE("valid function", "[verifier]") {
  WillowContext ctx;
  std::vector<Diagnostic> diags;
  DiagnosticEngine eng(
      [&](Diagnostic d) { diags.push_back(std::move(d)); });

  auto &m = *ctx.addModule("test");

  Type fty = ctx.types().FunctionType(ctx.types().VoidType(), {});
  auto &fn = *m.emplaceFunction("fn", &m, fty);

  REQUIRE(succeeded(verifyFunction(ctx, fn, eng)));
  REQUIRE(diags.empty());
}

TEST_CASE("invalid basic block", "[verifier]") {
  WillowContext ctx;
  std::vector<Diagnostic> diags;
  DiagnosticEngine eng(
      [&](Diagnostic d) { diags.push_back(std::move(d)); });

  auto &m = *ctx.addModule("test");

  Type fty = ctx.types().FunctionType(ctx.types().VoidType(), {});
  auto &fn = *m.emplaceFunction("fn", &m, fty);
  // TODO
}