package domain

import (
	"context"
	"os"
	"path/filepath"
	"testing"
	"time"

	archivalStore "git.nakama.town/fmartingr/hako/internal/archival/store"
	authDomain "git.nakama.town/fmartingr/hako/internal/auth/domain"
	authStore "git.nakama.town/fmartingr/hako/internal/auth/store"
	"git.nakama.town/fmartingr/hako/internal/database"
	"git.nakama.town/fmartingr/hako/internal/model"
	"git.nakama.town/fmartingr/hako/internal/testutil"
	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func setupTestLinkService(t *testing.T) (*LinkDomain, *archivalStore.ArchiveStore, *archivalStore.ArchiveFileStore, *archivalStore.LinkCategoryStore, *database.Connections, string, string, func()) {
	t.Helper()

	ctx := context.Background()
	testDeps := testutil.GetTestConfigurationAndDependencies(t, ctx)

	// Initialize domains (must be done in test to avoid import cycle)
	testDeps.Dependencies.Domains().SetLinks(NewLinkDomain(testDeps.Dependencies))
	testDeps.Dependencies.Domains().SetArchives(NewArchiveDomain(testDeps.Dependencies))
	testDeps.Dependencies.Domains().SetCategories(NewCategoryDomain(testDeps.Dependencies))
	testDeps.Dependencies.Domains().SetAuth(authDomain.NewAuthDomain(testDeps.Dependencies))

	// Create a test user
	userUUID := uuid.New()
	user := &authStore.User{
		ID:           userUUID,
		Email:        "test@example.com",
		PasswordHash: "test-hash",
		CreatedAt:    time.Now(),
		UpdatedAt:    time.Now(),
	}
	err := testDeps.Dependencies.UserStore.Create(user)
	require.NoError(t, err)

	linkService := testDeps.Dependencies.Domains().Links().(*LinkDomain)

	return linkService, testDeps.ArchiveStore, testDeps.ArchiveFileStore, testDeps.LinkCategoryStore, testDeps.DBConnections, userUUID.String(), testDeps.Config.ArchiveStoragePath, func() {}
}

func TestLinkService_DeleteLink_CascadeDelete(t *testing.T) {
	ctx := context.Background()
	linkService, archiveStore, archiveFileStore, linkCategoryStore, conns, userID, storageDir, cleanup := setupTestLinkService(t)
	defer cleanup()

	// Create a link
	link, err := linkService.CreateLink(ctx, "https://example.com/test", userID)
	require.NoError(t, err)

	// Wait a bit for the archive job to be created, then manually create a completed archive
	// For testing, let's create a completed archive manually
	archive := &model.Archive{
		ID:        uuid.New().String(),
		LinkID:    link.ID,
		UserID:    userID,
		Status:    model.ArchiveStatusCompleted,
		Title:     "Test Archive",
		CreatedAt: time.Now(),
	}
	err = archiveStore.Create(ctx, archive)
	require.NoError(t, err)

	// Create archive files
	file1 := &model.ArchiveFile{
		ID:          uuid.New().String(),
		ArchiveID:   archive.ID,
		ArchiverKey: "direct_download",
		Filename:    "test1.txt",
		MimeType:    "text/plain",
		FileSize:    100,
		StoragePath: model.GetPathForLinkFile(link.ID, "test1.txt"),
		HashSha256:  "abc123",
		CreatedAt:   time.Now(),
	}
	err = archiveFileStore.Create(ctx, file1)
	require.NoError(t, err)

	file2 := &model.ArchiveFile{
		ID:          uuid.New().String(),
		ArchiveID:   archive.ID,
		ArchiverKey: "direct_download",
		Filename:    "test2.txt",
		MimeType:    "text/plain",
		FileSize:    200,
		StoragePath: model.GetPathForLinkFile(link.ID, "test2.txt"),
		HashSha256:  "def456",
		CreatedAt:   time.Now(),
	}
	err = archiveFileStore.Create(ctx, file2)
	require.NoError(t, err)

	// Create storage files
	file1Path := filepath.Join(storageDir, file1.StoragePath)
	file2Path := filepath.Join(storageDir, file2.StoragePath)
	err = os.MkdirAll(filepath.Dir(file1Path), 0755)
	require.NoError(t, err)
	err = os.WriteFile(file1Path, []byte("test content 1"), 0644)
	require.NoError(t, err)
	err = os.WriteFile(file2Path, []byte("test content 2"), 0644)
	require.NoError(t, err)

	// Create a category and link it (insert directly into database)
	categoryID := uuid.New().String()
	now := time.Now().Format("2006-01-02 15:04:05")
	_, err = conns.Write.ExecContext(ctx, `
		INSERT INTO categories (id, name, icon, created_at, updated_at)
		VALUES (?, ?, ?, ?, ?)
	`, categoryID, "Test Category", "test-icon", now, now)
	require.NoError(t, err)

	err = linkCategoryStore.AddCategory(ctx, link.ID, categoryID)
	require.NoError(t, err)

	// Verify everything exists before deletion
	// Note: CreateLink creates an archive automatically, so we have 2 archives total
	archives, err := archiveStore.ListByLinkID(ctx, archivalStore.ArchiveListOptions{LinkID: link.ID})
	require.NoError(t, err)
	assert.Len(t, archives, 2) // One from CreateLink + one we created manually

	files, err := archiveFileStore.ListByArchiveID(ctx, archivalStore.ArchiveFileListOptions{ArchiveID: archive.ID})
	require.NoError(t, err)
	assert.Len(t, files, 2)

	categories, err := linkCategoryStore.GetCategoriesByLinkID(ctx, link.ID)
	require.NoError(t, err)
	assert.Len(t, categories, 1)

	// Verify storage files exist
	_, err = os.Stat(file1Path)
	require.NoError(t, err)
	_, err = os.Stat(file2Path)
	require.NoError(t, err)

	// Delete the link
	err = linkService.DeleteLink(ctx, link.ID)
	require.NoError(t, err)

	// Verify link is deleted
	_, err = linkService.GetLink(ctx, link.ID)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "not found")

	// Verify archives are deleted
	archives, err = archiveStore.ListByLinkID(ctx, archivalStore.ArchiveListOptions{LinkID: link.ID})
	require.NoError(t, err)
	assert.Len(t, archives, 0)

	// Verify archive files are deleted
	files, err = archiveFileStore.ListByArchiveID(ctx, archivalStore.ArchiveFileListOptions{ArchiveID: archive.ID})
	require.NoError(t, err)
	assert.Len(t, files, 0)

	// Verify link categories are deleted
	categories, err = linkCategoryStore.GetCategoriesByLinkID(ctx, link.ID)
	require.NoError(t, err)
	assert.Len(t, categories, 0)

	// Verify storage files are deleted
	_, err = os.Stat(file1Path)
	assert.True(t, os.IsNotExist(err))
	_, err = os.Stat(file2Path)
	assert.True(t, os.IsNotExist(err))
}

func TestLinkService_DeleteLink_MultipleArchives(t *testing.T) {
	ctx := context.Background()
	linkService, archiveStore, archiveFileStore, _, _, userID, storageDir, cleanup := setupTestLinkService(t)
	defer cleanup()

	// Create a link
	link, err := linkService.CreateLink(ctx, "https://example.com/test", userID)
	require.NoError(t, err)

	// Create multiple archives
	archive1 := &model.Archive{
		ID:        uuid.New().String(),
		LinkID:    link.ID,
		UserID:    userID,
		Status:    model.ArchiveStatusCompleted,
		Title:     "Archive 1",
		CreatedAt: time.Now(),
	}
	err = archiveStore.Create(ctx, archive1)
	require.NoError(t, err)

	archive2 := &model.Archive{
		ID:        uuid.New().String(),
		LinkID:    link.ID,
		UserID:    userID,
		Status:    model.ArchiveStatusCompleted,
		Title:     "Archive 2",
		CreatedAt: time.Now(),
	}
	err = archiveStore.Create(ctx, archive2)
	require.NoError(t, err)

	// Create files for each archive
	file1 := &model.ArchiveFile{
		ID:          uuid.New().String(),
		ArchiveID:   archive1.ID,
		ArchiverKey: "direct_download",
		Filename:    "file1.txt",
		MimeType:    "text/plain",
		FileSize:    100,
		StoragePath: model.GetPathForLinkFile(link.ID, "file1.txt"),
		HashSha256:  "hash1",
		CreatedAt:   time.Now(),
	}
	err = archiveFileStore.Create(ctx, file1)
	require.NoError(t, err)

	file2 := &model.ArchiveFile{
		ID:          uuid.New().String(),
		ArchiveID:   archive2.ID,
		ArchiverKey: "direct_download",
		Filename:    "file2.txt",
		MimeType:    "text/plain",
		FileSize:    200,
		StoragePath: model.GetPathForLinkFile(link.ID, "file2.txt"),
		HashSha256:  "hash2",
		CreatedAt:   time.Now(),
	}
	err = archiveFileStore.Create(ctx, file2)
	require.NoError(t, err)

	// Create storage files
	file1Path := filepath.Join(storageDir, file1.StoragePath)
	file2Path := filepath.Join(storageDir, file2.StoragePath)
	err = os.MkdirAll(filepath.Dir(file1Path), 0755)
	require.NoError(t, err)
	err = os.WriteFile(file1Path, []byte("content 1"), 0644)
	require.NoError(t, err)
	err = os.WriteFile(file2Path, []byte("content 2"), 0644)
	require.NoError(t, err)

	// Verify both archives exist
	// Note: CreateLink creates an archive automatically, so we have 3 archives total
	archives, err := archiveStore.ListByLinkID(ctx, archivalStore.ArchiveListOptions{LinkID: link.ID})
	require.NoError(t, err)
	assert.Len(t, archives, 3) // One from CreateLink + two we created manually

	// Delete the link
	err = linkService.DeleteLink(ctx, link.ID)
	require.NoError(t, err)

	// Verify all archives are deleted
	archives, err = archiveStore.ListByLinkID(ctx, archivalStore.ArchiveListOptions{LinkID: link.ID})
	require.NoError(t, err)
	assert.Len(t, archives, 0)

	// Verify all files are deleted
	files1, err := archiveFileStore.ListByArchiveID(ctx, archivalStore.ArchiveFileListOptions{ArchiveID: archive1.ID})
	require.NoError(t, err)
	assert.Len(t, files1, 0)

	files2, err := archiveFileStore.ListByArchiveID(ctx, archivalStore.ArchiveFileListOptions{ArchiveID: archive2.ID})
	require.NoError(t, err)
	assert.Len(t, files2, 0)

	// Verify storage files are deleted
	_, err = os.Stat(file1Path)
	assert.True(t, os.IsNotExist(err))
	_, err = os.Stat(file2Path)
	assert.True(t, os.IsNotExist(err))
}

func TestLinkService_DeleteLink_NoArchives(t *testing.T) {
	ctx := context.Background()
	linkService, _, _, _, _, userID, _, cleanup := setupTestLinkService(t)
	defer cleanup()

	// Create a link
	link, err := linkService.CreateLink(ctx, "https://example.com/test", userID)
	require.NoError(t, err)

	// Delete the link (should work even with no archives)
	err = linkService.DeleteLink(ctx, link.ID)
	require.NoError(t, err)

	// Verify link is deleted
	_, err = linkService.GetLink(ctx, link.ID)
	assert.Error(t, err)
}

func TestLinkService_DeleteLink_StorageFileNotFound(t *testing.T) {
	ctx := context.Background()
	linkService, archiveStore, archiveFileStore, _, _, userID, _, cleanup := setupTestLinkService(t)
	defer cleanup()

	// Create a link
	link, err := linkService.CreateLink(ctx, "https://example.com/test", userID)
	require.NoError(t, err)

	// Create an archive
	archive := &model.Archive{
		ID:        uuid.New().String(),
		LinkID:    link.ID,
		UserID:    userID,
		Status:    model.ArchiveStatusCompleted,
		Title:     "Test Archive",
		CreatedAt: time.Now(),
	}
	err = archiveStore.Create(ctx, archive)
	require.NoError(t, err)

	// Create archive file with storage path, but don't create the actual file
	file := &model.ArchiveFile{
		ID:          uuid.New().String(),
		ArchiveID:   archive.ID,
		ArchiverKey: "direct_download",
		Filename:    "missing.txt",
		MimeType:    "text/plain",
		FileSize:    100,
		StoragePath: model.GetPathForLinkFile(link.ID, "missing.txt"),
		HashSha256:  "hash",
		CreatedAt:   time.Now(),
	}
	err = archiveFileStore.Create(ctx, file)
	require.NoError(t, err)

	// Delete the link - should succeed even if storage file doesn't exist
	err = linkService.DeleteLink(ctx, link.ID)
	require.NoError(t, err)

	// Verify everything is deleted
	archives, err := archiveStore.ListByLinkID(ctx, archivalStore.ArchiveListOptions{LinkID: link.ID})
	require.NoError(t, err)
	assert.Len(t, archives, 0)
}