// Copyright 2026 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package issues_test

import (
	"testing"

	"code.gitea.io/gitea/models/db"
	issues_model "code.gitea.io/gitea/models/issues"
	"code.gitea.io/gitea/models/unittest"

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

func TestCreateCommitComment(t *testing.T) {
	require.NoError(t, unittest.PrepareTestDatabase())

	comment := &issues_model.Comment{
		PosterID:  2,
		RepoID:    1,
		CommitSHA: "abc123def456",
		TreePath:  "README.md",
		Line:      10,
		Content:   "looks good",
	}

	err := issues_model.CreateCommitComment(t.Context(), comment)
	require.NoError(t, err)
	assert.Greater(t, comment.ID, int64(0))
	assert.Equal(t, issues_model.CommentTypeCommitComment, comment.Type)

	// Verify it's in the DB
	loaded, err := issues_model.GetCommitCommentByID(t.Context(), 1, comment.ID)
	require.NoError(t, err)
	assert.Equal(t, "README.md", loaded.TreePath)
	assert.Equal(t, int64(10), loaded.Line)
	assert.Equal(t, "looks good", loaded.Content)
	assert.Equal(t, int64(1), loaded.RepoID)
}

func TestGetCommitCommentByID_WrongRepo(t *testing.T) {
	require.NoError(t, unittest.PrepareTestDatabase())

	comment := &issues_model.Comment{
		PosterID:  2,
		RepoID:    1,
		CommitSHA: "abc123def456",
		TreePath:  "main.go",
		Line:      5,
		Content:   "test",
	}
	require.NoError(t, issues_model.CreateCommitComment(t.Context(), comment))

	// Trying to load with wrong repo ID should fail
	_, err := issues_model.GetCommitCommentByID(t.Context(), 999, comment.ID)
	assert.True(t, db.IsErrNotExist(err))
}

func TestDeleteCommitComment(t *testing.T) {
	require.NoError(t, unittest.PrepareTestDatabase())

	comment := &issues_model.Comment{
		PosterID:  2,
		RepoID:    1,
		CommitSHA: "abc123def456",
		TreePath:  "README.md",
		Line:      10,
		Content:   "to be deleted",
	}
	require.NoError(t, issues_model.CreateCommitComment(t.Context(), comment))

	err := issues_model.DeleteCommitComment(t.Context(), 1, comment.ID)
	require.NoError(t, err)

	// Verify it's gone
	_, err = issues_model.GetCommitCommentByID(t.Context(), 1, comment.ID)
	assert.True(t, db.IsErrNotExist(err))
}

func TestDeleteCommitComment_WrongRepo(t *testing.T) {
	require.NoError(t, unittest.PrepareTestDatabase())

	comment := &issues_model.Comment{
		PosterID:  2,
		RepoID:    1,
		CommitSHA: "abc123def456",
		TreePath:  "README.md",
		Line:      10,
		Content:   "should not be deleted",
	}
	require.NoError(t, issues_model.CreateCommitComment(t.Context(), comment))

	// Delete with wrong repo should not actually delete
	err := issues_model.DeleteCommitComment(t.Context(), 999, comment.ID)
	require.NoError(t, err)

	// Verify it's still there
	loaded, err := issues_model.GetCommitCommentByID(t.Context(), 1, comment.ID)
	require.NoError(t, err)
	assert.Equal(t, comment.ID, loaded.ID)
}

func TestFindCommitCommentsByCommitSHA(t *testing.T) {
	require.NoError(t, unittest.PrepareTestDatabase())

	sha := "deadbeef1234"
	// Create two comments on same commit, different lines
	for _, line := range []int64{5, -10} {
		c := &issues_model.Comment{
			PosterID:  2,
			RepoID:    1,
			CommitSHA: sha,
			TreePath:  "main.go",
			Line:      line,
			Content:   "comment",
		}
		require.NoError(t, issues_model.CreateCommitComment(t.Context(), c))
	}

	comments, err := issues_model.FindCommitCommentsByCommitSHA(t.Context(), 1, sha)
	require.NoError(t, err)
	assert.Len(t, comments, 2)

	// Different repo should return empty
	comments, err = issues_model.FindCommitCommentsByCommitSHA(t.Context(), 999, sha)
	require.NoError(t, err)
	assert.Empty(t, comments)
}

func TestFindCommitCommentsForDiff(t *testing.T) {
	require.NoError(t, unittest.PrepareTestDatabase())

	sha := "cafebabe5678"
	// Left side comment (negative line = old/previous side)
	c1 := &issues_model.Comment{
		PosterID:  2,
		RepoID:    1,
		CommitSHA: sha,
		TreePath:  "file.go",
		Line:      -3,
		Content:   "old side",
	}
	require.NoError(t, issues_model.CreateCommitComment(t.Context(), c1))

	// Right side comment (positive line = new/proposed side)
	c2 := &issues_model.Comment{
		PosterID:  2,
		RepoID:    1,
		CommitSHA: sha,
		TreePath:  "file.go",
		Line:      7,
		Content:   "new side",
	}
	require.NoError(t, issues_model.CreateCommitComment(t.Context(), c2))

	result, err := issues_model.FindCommitCommentsForDiff(t.Context(), 1, sha)
	require.NoError(t, err)

	fcc, ok := result["file.go"]
	require.True(t, ok)
	assert.Len(t, fcc.Left[3], 1)
	assert.Equal(t, "old side", fcc.Left[3][0].Content)
	assert.Len(t, fcc.Right[7], 1)
	assert.Equal(t, "new side", fcc.Right[7][0].Content)
}