// Copyright 2024 The Dawn & Tint Authors
//
// 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.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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.

package common

import (
	"context"
	"testing"
	"time"

	"dawn.googlesource.com/dawn/tools/src/buildbucket"
	"dawn.googlesource.com/dawn/tools/src/cts/query"
	"dawn.googlesource.com/dawn/tools/src/cts/result"
	"dawn.googlesource.com/dawn/tools/src/resultsdb"
	"github.com/stretchr/testify/assert"
)

// TODO(crbug.com/342554800): Add test coverage for:
//   ResultSource.GetResults (requires breaking out into helper functions)
//   CacheResults
//   LatestCTSRoll
//   LatestPatchset
//   MostRecentResultsForChange

/*******************************************************************************
 * Fake implementations
 ******************************************************************************/

// A fake version of dawn/tools/src/resultsdb's BigQueryClient.
type mockedBigQueryClient struct {
	returnValues []resultsdb.QueryResult
}

func (bq mockedBigQueryClient) QueryTestResults(
	ctx context.Context, builds []buildbucket.BuildID, testPrefix string, f func(*resultsdb.QueryResult) error) error {
	for _, result := range bq.returnValues {
		if err := f(&result); err != nil {
			return err
		}
	}
	return nil
}

/*******************************************************************************
 * GetResults tests
 ******************************************************************************/

func generateGoodGetResultsInputs() (context.Context, Config, *mockedBigQueryClient, BuildsByName) {
	ctx := context.Background()

	cfg := Config{
		Tests: []TestConfig{
			TestConfig{
				ExecutionMode: result.ExecutionMode("execution_mode"),
				Prefixes:      []string{"prefix"},
			},
		},
	}

	client := &mockedBigQueryClient{
		returnValues: []resultsdb.QueryResult{
			resultsdb.QueryResult{
				TestId:   "prefix_test",
				Status:   "PASS",
				Tags:     []resultsdb.TagPair{},
				Duration: 1.0,
			},
		},
	}

	builds := make(BuildsByName)

	return ctx, cfg, client, builds
}

// Tests that valid results are properly cleaned, sorted, and returned.
func TestGetResultsHappyPath(t *testing.T) {
	ctx, cfg, client, builds := generateGoodGetResultsInputs()

	cfg.Tag.Remove = []string{
		"remove_me",
	}

	client.returnValues = []resultsdb.QueryResult{
		resultsdb.QueryResult{
			TestId: "prefix_test_2",
			Status: "PASS",
			Tags: []resultsdb.TagPair{
				resultsdb.TagPair{
					Key:   "typ_tag",
					Value: "remove_me",
				},
				resultsdb.TagPair{
					Key:   "typ_tag",
					Value: "win",
				},
			},
			Duration: 2.0,
		},
		resultsdb.QueryResult{
			TestId: "prefix_test_1",
			Status: "PASS",
			Tags: []resultsdb.TagPair{
				resultsdb.TagPair{
					Key:   "typ_tag",
					Value: "linux",
				},
			},
			Duration: 1.0,
		},
	}

	expectedResultsList := result.List{
		result.Result{
			Query:        query.Parse("_test_1"),
			Status:       result.Pass,
			Tags:         result.NewTags("linux"),
			Duration:     time.Second,
			MayExonerate: false,
		},
		result.Result{
			Query:        query.Parse("_test_2"),
			Status:       result.Pass,
			Tags:         result.NewTags("win"),
			Duration:     2 * time.Second,
			MayExonerate: false,
		},
	}

	expectedResults := make(result.ResultsByExecutionMode)
	expectedResults["execution_mode"] = expectedResultsList

	results, err := GetResults(ctx, cfg, client, builds)
	assert.Nil(t, err)
	assert.Equal(t, results, expectedResults)
}

// Tests that errors from GetRawResults are properly surfaced.
func TestGetResultsGetRawResultsErrorSurfaced(t *testing.T) {
	ctx, cfg, client, builds := generateGoodGetResultsInputs()
	client.returnValues[0].TestId = "bad_test"

	results, err := GetResults(ctx, cfg, client, builds)
	assert.Nil(t, results)
	assert.ErrorContains(t, err, "Test ID bad_test did not start with prefix even though query should have filtered.")
}

/*******************************************************************************
 * GetRawResults tests
 ******************************************************************************/

// Tests that valid results are properly parsed and returned.
func TestGetRawResultsHappyPath(t *testing.T) {
	ctx, cfg, client, builds := generateGoodGetResultsInputs()
	client.returnValues = []resultsdb.QueryResult{
		resultsdb.QueryResult{
			TestId:   "prefix_test_1",
			Status:   "PASS",
			Tags:     []resultsdb.TagPair{},
			Duration: 1.0,
		},
		resultsdb.QueryResult{
			TestId: "prefix_test_2",
			Status: "FAIL",
			Tags: []resultsdb.TagPair{
				resultsdb.TagPair{
					Key:   "javascript_duration",
					Value: "0.5s",
				},
			},
			Duration: 2.0,
		},
		resultsdb.QueryResult{
			TestId: "prefix_test_3",
			Status: "SKIP",
			Tags: []resultsdb.TagPair{
				resultsdb.TagPair{
					Key:   "may_exonerate",
					Value: "true",
				},
			},
			Duration: 3.0,
		},
		resultsdb.QueryResult{
			TestId: "prefix_test_4",
			Status: "SomeStatus",
			Tags: []resultsdb.TagPair{
				resultsdb.TagPair{
					Key:   "typ_tag",
					Value: "linux",
				},
				resultsdb.TagPair{
					Key:   "typ_tag",
					Value: "intel",
				},
			},
			Duration: 4.0,
		},
	}

	expectedResultsList := result.List{
		result.Result{
			Query:        query.Parse("_test_1"),
			Status:       result.Pass,
			Tags:         result.NewTags(),
			Duration:     time.Second,
			MayExonerate: false,
		},
		result.Result{
			Query:        query.Parse("_test_2"),
			Status:       result.Failure,
			Tags:         result.NewTags(),
			Duration:     500 * time.Millisecond,
			MayExonerate: false,
		},
		result.Result{
			Query:        query.Parse("_test_3"),
			Status:       result.Skip,
			Tags:         result.NewTags(),
			Duration:     3 * time.Second,
			MayExonerate: true,
		},
		result.Result{
			Query:        query.Parse("_test_4"),
			Status:       result.Unknown,
			Tags:         result.NewTags("linux", "intel"),
			Duration:     4 * time.Second,
			MayExonerate: false,
		},
	}

	expectedResults := make(result.ResultsByExecutionMode)
	expectedResults["execution_mode"] = expectedResultsList

	results, err := GetRawResults(ctx, cfg, client, builds)
	assert.Nil(t, err)
	assert.Equal(t, results, expectedResults)
}

// Tests that a mismatched prefix results in an error.
func TestGetRawResultsPrefixMismatch(t *testing.T) {
	ctx, cfg, client, builds := generateGoodGetResultsInputs()
	client.returnValues[0].TestId = "bad_test"

	results, err := GetRawResults(ctx, cfg, client, builds)
	assert.Nil(t, results)
	assert.ErrorContains(t, err, "Test ID bad_test did not start with prefix even though query should have filtered.")
}

// Tests that a JavaScript duration that cannot be parsed results in an error.
func TestGetRawResultsBadJavaScriptDuration(t *testing.T) {
	ctx, cfg, client, builds := generateGoodGetResultsInputs()
	client.returnValues[0].Tags = []resultsdb.TagPair{
		resultsdb.TagPair{
			Key:   "javascript_duration",
			Value: "1000foo",
		},
	}

	results, err := GetRawResults(ctx, cfg, client, builds)
	assert.Nil(t, results)
	assert.ErrorContains(t, err, `time: unknown unit "foo" in duration "1000foo"`)
}

// Tests that a non-boolean may_exonerate value results in an error.
func TestGetRawResultsBadMayExonerate(t *testing.T) {
	ctx, cfg, client, builds := generateGoodGetResultsInputs()
	client.returnValues[0].Tags = []resultsdb.TagPair{
		resultsdb.TagPair{
			Key:   "may_exonerate",
			Value: "yesnt",
		},
	}

	results, err := GetRawResults(ctx, cfg, client, builds)
	assert.Nil(t, results)
	assert.ErrorContains(t, err, `strconv.ParseBool: parsing "yesnt": invalid syntax`)
}

/*******************************************************************************
 * CleanResults tests
 ******************************************************************************/

// Tests that tags specified for removal are properly removed.
func TestCleanResultsTagRemoval(t *testing.T) {
	cfg := Config{}
	cfg.Tag.Remove = []string{
		"remove_1",
		"remove_2",
		"remove_3",
		"missing",
	}

	results := result.List{
		result.Result{
			Query:        query.Parse("test_1"),
			Status:       result.Pass,
			Tags:         result.NewTags("remove_1", "remove_2", "linux"),
			Duration:     time.Second,
			MayExonerate: false,
		},
		result.Result{
			Query:        query.Parse("test_2"),
			Status:       result.Pass,
			Tags:         result.NewTags("remove_2", "remove_3"),
			Duration:     time.Second,
			MayExonerate: false,
		},
	}

	expectedResults := result.List{
		result.Result{
			Query:        query.Parse("test_1"),
			Status:       result.Pass,
			Tags:         result.NewTags("linux"),
			Duration:     time.Second,
			MayExonerate: false,
		},
		result.Result{
			Query:        query.Parse("test_2"),
			Status:       result.Pass,
			Tags:         result.NewTags(),
			Duration:     time.Second,
			MayExonerate: false,
		},
	}

	CleanResults(cfg, &results)
	assert.Equal(t, results, expectedResults)
}

// Tests that duplicate results with the same status always use that status.
func TestCleanResultsDuplicateResultSameStatus(t *testing.T) {
	cfg := Config{}
	for _, status := range []result.Status{result.Abort, result.Crash,
		result.Failure, result.Pass, result.RetryOnFailure, result.Skip, result.Slow, result.Unknown} {
		results := result.List{
			result.Result{
				Query:        query.Parse("test_1"),
				Status:       status,
				Tags:         result.NewTags(),
				Duration:     time.Second,
				MayExonerate: false,
			},
			result.Result{
				Query:        query.Parse("test_1"),
				Status:       status,
				Tags:         result.NewTags(),
				Duration:     3 * time.Second,
				MayExonerate: false,
			},
		}

		expectedResults := result.List{
			result.Result{
				Query:        query.Parse("test_1"),
				Status:       status,
				Tags:         result.NewTags(),
				Duration:     2 * time.Second,
				MayExonerate: false,
			},
		}

		CleanResults(cfg, &results)
		assert.Equal(t, results, expectedResults)
	}
}

func runPriorityTest(t *testing.T, testedStatus result.Status, lowerPriorityStatuses *[]result.Status) {
	cfg := Config{}
	for _, status := range *lowerPriorityStatuses {
		results := result.List{
			result.Result{
				Query:        query.Parse("test_1"),
				Status:       status,
				Tags:         result.NewTags(),
				Duration:     time.Second,
				MayExonerate: false,
			},
			result.Result{
				Query:        query.Parse("test_1"),
				Status:       testedStatus,
				Tags:         result.NewTags(),
				Duration:     3 * time.Second,
				MayExonerate: false,
			},
		}

		expectedResults := result.List{
			result.Result{
				Query:        query.Parse("test_1"),
				Status:       testedStatus,
				Tags:         result.NewTags(),
				Duration:     2 * time.Second,
				MayExonerate: false,
			},
		}

		CleanResults(cfg, &results)
		assert.Equal(t, results, expectedResults)
	}
}

// Tests that Crash has the highest priority among statuses.
func TestCleanResultsReplaceResultCrash(t *testing.T) {
	lowerPriorityStatuses := []result.Status{result.Abort, result.Failure, result.Slow, result.Pass, result.RetryOnFailure, result.Skip, result.Unknown}
	runPriorityTest(t, result.Crash, &lowerPriorityStatuses)
}

// Tests that Abort has the second highest priority among statuses.
func TestCleanResultsReplaceResultAbort(t *testing.T) {
	lowerPriorityStatuses := []result.Status{result.Failure, result.Slow, result.Pass, result.RetryOnFailure, result.Skip, result.Unknown}
	runPriorityTest(t, result.Abort, &lowerPriorityStatuses)
}

// Tests that Failure has the third highest priority among statuses.
func TestCleanResultsReplaceResultFailure(t *testing.T) {
	lowerPriorityStatuses := []result.Status{result.Slow, result.Pass, result.RetryOnFailure, result.Skip, result.Unknown}
	runPriorityTest(t, result.Failure, &lowerPriorityStatuses)
}

// Tests that Slow has the fourth highest priority among statuses.
func TestCleanResultsReplaceResultSlow(t *testing.T) {
	lowerPriorityStatuses := []result.Status{result.Pass, result.RetryOnFailure, result.Skip, result.Unknown}
	runPriorityTest(t, result.Slow, &lowerPriorityStatuses)
}

// Tests that statuses without explicit priority default to Failure.
func TestCleanResultsReplacEresultDefault(t *testing.T) {
	cfg := Config{}
	statuses := []result.Status{result.Pass, result.RetryOnFailure, result.Skip, result.Unknown}
	for i, leftStatus := range statuses {
		for j, rightStatus := range statuses {
			if i == j {
				continue
			}

			results := result.List{
				result.Result{
					Query:        query.Parse("test_1"),
					Status:       leftStatus,
					Tags:         result.NewTags(),
					Duration:     time.Second,
					MayExonerate: false,
				},
				result.Result{
					Query:        query.Parse("test_1"),
					Status:       rightStatus,
					Tags:         result.NewTags(),
					Duration:     3 * time.Second,
					MayExonerate: false,
				},
			}

			expectedResults := result.List{
				result.Result{
					Query:        query.Parse("test_1"),
					Status:       result.Failure,
					Tags:         result.NewTags(),
					Duration:     2 * time.Second,
					MayExonerate: false,
				},
			}

			CleanResults(cfg, &results)
			assert.Equal(t, results, expectedResults)
		}
	}
}