// Copyright 2024 The Forgejo Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package issue_test

import (
	"testing"

	"forgejo.org/models/db"
	issues_model "forgejo.org/models/issues"
	"forgejo.org/models/moderation"
	"forgejo.org/models/unittest"
	user_model "forgejo.org/models/user"
	webhook_model "forgejo.org/models/webhook"
	"forgejo.org/modules/json"
	"forgejo.org/modules/setting"
	"forgejo.org/modules/test"
	issue_service "forgejo.org/services/issue"
	"forgejo.org/tests"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestDeleteComment(t *testing.T) {
	// Use the webhook notification to check if a notification is fired for an action.
	defer test.MockVariableValue(&setting.DisableWebhooks, false)()
	require.NoError(t, unittest.PrepareTestDatabase())

	t.Run("Normal comment", func(t *testing.T) {
		defer tests.PrintCurrentTest(t)()

		comment := unittest.AssertExistsAndLoadBean(t, &issues_model.Comment{ID: 2})
		issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: comment.IssueID})
		unittest.AssertCount(t, &issues_model.Reaction{CommentID: comment.ID}, 2)

		require.NoError(t, webhook_model.CreateWebhook(db.DefaultContext, &webhook_model.Webhook{
			RepoID:   issue.RepoID,
			IsActive: true,
			Events:   `{"choose_events":true,"events":{"issue_comment": true}}`,
		}))
		hookTaskCount := unittest.GetCount(t, &webhook_model.HookTask{})

		require.NoError(t, issue_service.DeleteComment(db.DefaultContext, nil, comment))

		// The comment doesn't exist anymore.
		unittest.AssertNotExistsBean(t, &issues_model.Comment{ID: comment.ID})
		// Reactions don't exist anymore for this comment.
		unittest.AssertNotExistsBean(t, &issues_model.Reaction{CommentID: comment.ID})
		// Number of comments was decreased.
		assert.Equal(t, issue.NumComments-1, unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: comment.IssueID}).NumComments)
		// A notification was fired for the deletion of this comment.
		assert.Equal(t, hookTaskCount+1, unittest.GetCount(t, &webhook_model.HookTask{}))
	})

	t.Run("Comment of pending review", func(t *testing.T) {
		defer tests.PrintCurrentTest(t)()

		// We have to ensure that this comment's linked review is pending.
		comment := unittest.AssertExistsAndLoadBean(t, &issues_model.Comment{ID: 4}, "review_id != 0")
		review := unittest.AssertExistsAndLoadBean(t, &issues_model.Review{ID: comment.ReviewID})
		assert.Equal(t, issues_model.ReviewTypePending, review.Type)
		issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: comment.IssueID})

		require.NoError(t, webhook_model.CreateWebhook(db.DefaultContext, &webhook_model.Webhook{
			RepoID:   issue.RepoID,
			IsActive: true,
			Events:   `{"choose_events":true,"events":{"issue_comment": true}}`,
		}))
		hookTaskCount := unittest.GetCount(t, &webhook_model.HookTask{})

		require.NoError(t, comment.LoadReview(t.Context()))
		require.NoError(t, issue_service.DeleteComment(db.DefaultContext, nil, comment))

		// The comment doesn't exist anymore.
		unittest.AssertNotExistsBean(t, &issues_model.Comment{ID: comment.ID})
		// Ensure that the number of comments wasn't decreased.
		assert.Equal(t, issue.NumComments, unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: comment.IssueID}).NumComments)
		// No notification was fired for the deletion of this comment.
		assert.Equal(t, hookTaskCount, unittest.GetCount(t, &webhook_model.HookTask{}))
		// The review doesn't exist anymore.
		unittest.AssertNotExistsBean(t, &issues_model.Review{ID: comment.ReviewID})
	})
}

func TestUpdateComment(t *testing.T) {
	// Use the webhook notification to check if a notification is fired for an action.
	defer test.MockVariableValue(&setting.DisableWebhooks, false)()
	require.NoError(t, unittest.PrepareTestDatabase())

	admin := unittest.AssertExistsAndLoadBean(t, &user_model.User{IsAdmin: true})
	t.Run("Normal comment", func(t *testing.T) {
		defer tests.PrintCurrentTest(t)()

		comment := unittest.AssertExistsAndLoadBean(t, &issues_model.Comment{ID: 2})
		issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: comment.IssueID})
		unittest.AssertNotExistsBean(t, &issues_model.ContentHistory{CommentID: comment.ID})
		require.NoError(t, webhook_model.CreateWebhook(db.DefaultContext, &webhook_model.Webhook{
			RepoID:   issue.RepoID,
			IsActive: true,
			Events:   `{"choose_events":true,"events":{"issue_comment": true}}`,
		}))
		hookTaskCount := unittest.GetCount(t, &webhook_model.HookTask{})
		oldContent := comment.Content
		comment.Content = "Hello!"

		require.NoError(t, issue_service.UpdateComment(db.DefaultContext, comment, 1, admin, oldContent))

		newComment := unittest.AssertExistsAndLoadBean(t, &issues_model.Comment{ID: 2})
		// Content was updated.
		assert.Equal(t, comment.Content, newComment.Content)
		// Content version was updated.
		assert.Equal(t, 2, newComment.ContentVersion)
		// A notification was fired for the update of this comment.
		assert.Equal(t, hookTaskCount+1, unittest.GetCount(t, &webhook_model.HookTask{}))
		// Issue history was saved for this comment.
		unittest.AssertExistsAndLoadBean(t, &issues_model.ContentHistory{CommentID: comment.ID, IsFirstCreated: true, ContentText: oldContent})
		unittest.AssertExistsAndLoadBean(t, &issues_model.ContentHistory{CommentID: comment.ID, ContentText: comment.Content}, "is_first_created = false")
	})

	t.Run("Comment of pending review", func(t *testing.T) {
		defer tests.PrintCurrentTest(t)()

		comment := unittest.AssertExistsAndLoadBean(t, &issues_model.Comment{ID: 4}, "review_id != 0")
		review := unittest.AssertExistsAndLoadBean(t, &issues_model.Review{ID: comment.ReviewID})
		assert.Equal(t, issues_model.ReviewTypePending, review.Type)
		issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: comment.IssueID})
		unittest.AssertNotExistsBean(t, &issues_model.ContentHistory{CommentID: comment.ID})
		require.NoError(t, webhook_model.CreateWebhook(db.DefaultContext, &webhook_model.Webhook{
			RepoID:   issue.RepoID,
			IsActive: true,
			Events:   `{"choose_events":true,"events":{"issue_comment": true}}`,
		}))
		hookTaskCount := unittest.GetCount(t, &webhook_model.HookTask{})
		oldContent := comment.Content
		comment.Content = "Hello!"

		require.NoError(t, issue_service.UpdateComment(db.DefaultContext, comment, 1, admin, oldContent))

		newComment := unittest.AssertExistsAndLoadBean(t, &issues_model.Comment{ID: 2})
		// Content was updated.
		assert.Equal(t, comment.Content, newComment.Content)
		// Content version was updated.
		assert.Equal(t, 2, newComment.ContentVersion)
		// No notification was fired for the update of this comment.
		assert.Equal(t, hookTaskCount, unittest.GetCount(t, &webhook_model.HookTask{}))
		// Issue history was not saved for this comment.
		unittest.AssertNotExistsBean(t, &issues_model.ContentHistory{CommentID: comment.ID})
	})
}

func TestCreateShadowCopyOnCommentUpdate(t *testing.T) {
	defer unittest.OverrideFixtures("models/fixtures/ModerationFeatures")()
	require.NoError(t, unittest.PrepareTestDatabase())

	userAlexSmithID := int64(1002)
	spamCommentID := int64(18) // posted by @alexsmith
	abuseReportID := int64(1)  // submitted for above comment
	newCommentContent := "If anyone needs help, just contact me."

	// Retrieve the abusive user (@alexsmith), their SPAM comment and the abuse report already created for this comment.
	poster := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: userAlexSmithID})
	comment := unittest.AssertExistsAndLoadBean(t, &issues_model.Comment{ID: spamCommentID, PosterID: poster.ID})
	report := unittest.AssertExistsAndLoadBean(t, &moderation.AbuseReport{
		ID:          abuseReportID,
		ContentType: moderation.ReportedContentTypeComment,
		ContentID:   comment.ID,
	})
	// The report should not already have a shadow copy linked.
	assert.False(t, report.ShadowCopyID.Valid)

	// The abusive user is updating their comment.
	oldContent := comment.Content
	comment.Content = newCommentContent
	require.NoError(t, issue_service.UpdateComment(t.Context(), comment, 0, poster, oldContent))

	// Reload the report.
	report = unittest.AssertExistsAndLoadBean(t, &moderation.AbuseReport{ID: report.ID})
	// A shadow copy should have been created and linked to our report.
	assert.True(t, report.ShadowCopyID.Valid)
	// Retrieve the newly created shadow copy and unmarshal the stored JSON so that we can check the values.
	shadowCopy := unittest.AssertExistsAndLoadBean(t, &moderation.AbuseReportShadowCopy{ID: report.ShadowCopyID.Int64})
	shadowCopyCommentData := new(issues_model.CommentData)
	require.NoError(t, json.Unmarshal([]byte(shadowCopy.RawValue), &shadowCopyCommentData))
	// Check to see if the initial content of the comment was stored within the shadow copy.
	assert.Equal(t, oldContent, shadowCopyCommentData.Content)
}
