// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <zxtest/zxtest.h>

#include "fidl/diagnostic_types.h"
#include "fidl/diagnostics.h"
#include "fidl/reporter.h"
#include "fidl/source_span.h"
#include "fidl/virtual_source_file.h"
#include "test_library.h"

namespace {

using fidl::Diagnostic;
using fidl::ErrorDef;
using fidl::Reporter;
using fidl::SourceSpan;
using fidl::VirtualSourceFile;
using fidl::WarningDef;

constexpr ErrorDef<std::string_view, std::string_view> ErrTest(
    "This test error has one string param '{}' and another '{}'.");
constexpr WarningDef<std::string_view, std::string_view> WarnTest(
    "This test warning has one string param '{}' and another '{}'.");

TEST(ReporterTests, ReportErrorFormatParams) {
  Reporter reporter;
  VirtualSourceFile file("fake");
  SourceSpan span("span text", file);
  reporter.Fail(ErrTest, span, "param1", "param2");

  const auto& errors = reporter.errors();
  ASSERT_EQ(errors.size(), 1);
  ASSERT_EQ(errors[0]->span, span);
  ASSERT_SUBSTR(errors[0]->msg.c_str(),
                "This test error has one string param 'param1' and another 'param2'.");
}

TEST(ReporterTests, MakeErrorThenReportIt) {
  Reporter reporter;
  VirtualSourceFile file("fake");
  SourceSpan span("span text", file);
  std::unique_ptr<Diagnostic> diag = Diagnostic::MakeError(ErrTest, span, "param1", "param2");
  reporter.Report(std::move(diag));

  const auto& errors = reporter.errors();
  ASSERT_EQ(errors.size(), 1);
  ASSERT_EQ(errors[0]->span, span);
  ASSERT_SUBSTR(errors[0]->msg.c_str(),
                "This test error has one string param 'param1' and another 'param2'.");
}

TEST(ReporterTests, ReportWarningFormatParams) {
  Reporter reporter;
  VirtualSourceFile file("fake");
  SourceSpan span("span text", file);
  reporter.Warn(WarnTest, span, "param1", "param2");

  const auto& warnings = reporter.warnings();
  ASSERT_EQ(warnings.size(), 1);
  ASSERT_EQ(warnings[0]->span, span);
  ASSERT_SUBSTR(warnings[0]->msg.c_str(),
                "This test warning has one string param 'param1' and another 'param2'.");
}

TEST(ReporterTests, MakeWarningThenReportIt) {
  Reporter reporter;
  VirtualSourceFile file("fake");
  SourceSpan span("span text", file);
  std::unique_ptr<Diagnostic> diag = Diagnostic::MakeWarning(WarnTest, span, "param1", "param2");
  reporter.Report(std::move(diag));

  const auto& warnings = reporter.warnings();
  ASSERT_EQ(warnings.size(), 1);
  ASSERT_EQ(warnings[0]->span, span);
  ASSERT_SUBSTR(warnings[0]->msg.c_str(),
                "This test warning has one string param 'param1' and another 'param2'.");
}

TEST(ReporterTests, CheckpointNumNewErrors) {
  Reporter reporter;
  VirtualSourceFile file("fake");
  SourceSpan span("span text", file);
  reporter.Fail(ErrTest, span, "1", "");

  auto checkpoint = reporter.Checkpoint();
  EXPECT_EQ(checkpoint.NumNewErrors(), 0);
  EXPECT_TRUE(checkpoint.NoNewErrors());

  reporter.Fail(ErrTest, span, "2", "");
  EXPECT_EQ(checkpoint.NumNewErrors(), 1);
  EXPECT_FALSE(checkpoint.NoNewErrors());

  reporter.Fail(ErrTest, span, "3", "");
  EXPECT_EQ(checkpoint.NumNewErrors(), 2);
  EXPECT_FALSE(checkpoint.NoNewErrors());
}

}  // namespace