package db

import (
	"database/sql"
	"fmt"
	"strings"
	"testing"
)

func TestAnnotations_Placeholder(t *testing.T) {
	// Placeholder test for annotations package
	// GetRepositoryAnnotations returns map[string]string
	annotations := make(map[string]string)
	annotations["test"] = "value"

	if annotations["test"] != "value" {
		t.Error("Expected annotation value to be stored")
	}
}

// Integration tests

func setupAnnotationsTestDB(t *testing.T) *sql.DB {
	t.Helper()
	// Use a named in-memory DB unique to this test to ensure isolation between tests
	safeName := strings.ReplaceAll(t.Name(), "/", "_")
	db, err := InitDB(fmt.Sprintf("file:%s?mode=memory&cache=shared", safeName), LibsqlConfig{})
	if err != nil {
		t.Fatalf("Failed to initialize test database: %v", err)
	}
	// Limit to single connection to avoid race conditions in tests
	db.SetMaxOpenConns(1)
	t.Cleanup(func() { db.Close() })
	return db
}

func createAnnotationTestUser(t *testing.T, db *sql.DB, did, handle string) {
	t.Helper()
	_, err := db.Exec(`
		INSERT OR IGNORE INTO users (did, handle, pds_endpoint, last_seen)
		VALUES (?, ?, ?, datetime('now'))
	`, did, handle, "https://pds.example.com")
	if err != nil {
		t.Fatalf("Failed to create test user: %v", err)
	}
}

// TestGetRepositoryAnnotations_Empty tests retrieving from empty repository
func TestGetRepositoryAnnotations_Empty(t *testing.T) {
	db := setupAnnotationsTestDB(t)

	annotations, err := GetRepositoryAnnotations(db, "did:plc:alice123", "myapp")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations() error = %v", err)
	}

	if len(annotations) != 0 {
		t.Errorf("Expected empty annotations, got %d entries", len(annotations))
	}
}

// TestGetRepositoryAnnotations_WithData tests retrieving existing annotations
func TestGetRepositoryAnnotations_WithData(t *testing.T) {
	db := setupAnnotationsTestDB(t)
	createAnnotationTestUser(t, db, "did:plc:alice123", "alice.bsky.social")

	// Insert test annotations
	testAnnotations := map[string]string{
		"org.opencontainers.image.title":       "My App",
		"org.opencontainers.image.description": "A test application",
		"org.opencontainers.image.version":     "1.0.0",
	}

	err := UpsertRepositoryAnnotations(db, "did:plc:alice123", "myapp", testAnnotations)
	if err != nil {
		t.Fatalf("UpsertRepositoryAnnotations() error = %v", err)
	}

	// Retrieve annotations
	annotations, err := GetRepositoryAnnotations(db, "did:plc:alice123", "myapp")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations() error = %v", err)
	}

	if len(annotations) != len(testAnnotations) {
		t.Errorf("Expected %d annotations, got %d", len(testAnnotations), len(annotations))
	}

	for key, expectedValue := range testAnnotations {
		if actualValue, ok := annotations[key]; !ok {
			t.Errorf("Missing annotation key: %s", key)
		} else if actualValue != expectedValue {
			t.Errorf("Annotation[%s] = %v, want %v", key, actualValue, expectedValue)
		}
	}
}

// TestUpsertRepositoryAnnotations_Insert tests inserting new annotations
func TestUpsertRepositoryAnnotations_Insert(t *testing.T) {
	db := setupAnnotationsTestDB(t)
	createAnnotationTestUser(t, db, "did:plc:bob456", "bob.bsky.social")

	annotations := map[string]string{
		"key1": "value1",
		"key2": "value2",
	}

	err := UpsertRepositoryAnnotations(db, "did:plc:bob456", "testapp", annotations)
	if err != nil {
		t.Fatalf("UpsertRepositoryAnnotations() error = %v", err)
	}

	// Verify annotations were inserted
	retrieved, err := GetRepositoryAnnotations(db, "did:plc:bob456", "testapp")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations() error = %v", err)
	}

	if len(retrieved) != len(annotations) {
		t.Errorf("Expected %d annotations, got %d", len(annotations), len(retrieved))
	}

	for key, expectedValue := range annotations {
		if actualValue := retrieved[key]; actualValue != expectedValue {
			t.Errorf("Annotation[%s] = %v, want %v", key, actualValue, expectedValue)
		}
	}
}

// TestUpsertRepositoryAnnotations_Update tests updating existing annotations
func TestUpsertRepositoryAnnotations_Update(t *testing.T) {
	db := setupAnnotationsTestDB(t)
	createAnnotationTestUser(t, db, "did:plc:charlie789", "charlie.bsky.social")

	// Insert initial annotations
	initial := map[string]string{
		"key1": "oldvalue1",
		"key2": "oldvalue2",
		"key3": "oldvalue3",
	}

	err := UpsertRepositoryAnnotations(db, "did:plc:charlie789", "updateapp", initial)
	if err != nil {
		t.Fatalf("Initial UpsertRepositoryAnnotations() error = %v", err)
	}

	// Update with new annotations (completely replaces old ones)
	updated := map[string]string{
		"key1": "newvalue1", // Updated
		"key4": "newvalue4", // New key (key2 and key3 removed)
	}

	err = UpsertRepositoryAnnotations(db, "did:plc:charlie789", "updateapp", updated)
	if err != nil {
		t.Fatalf("Update UpsertRepositoryAnnotations() error = %v", err)
	}

	// Verify annotations were replaced
	retrieved, err := GetRepositoryAnnotations(db, "did:plc:charlie789", "updateapp")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations() error = %v", err)
	}

	if len(retrieved) != len(updated) {
		t.Errorf("Expected %d annotations, got %d", len(updated), len(retrieved))
	}

	// Verify new values
	if retrieved["key1"] != "newvalue1" {
		t.Errorf("key1 = %v, want newvalue1", retrieved["key1"])
	}
	if retrieved["key4"] != "newvalue4" {
		t.Errorf("key4 = %v, want newvalue4", retrieved["key4"])
	}

	// Verify old keys were removed
	if _, exists := retrieved["key2"]; exists {
		t.Error("key2 should have been removed")
	}
	if _, exists := retrieved["key3"]; exists {
		t.Error("key3 should have been removed")
	}
}

// TestUpsertRepositoryAnnotations_EmptyMap tests upserting with empty map
func TestUpsertRepositoryAnnotations_EmptyMap(t *testing.T) {
	db := setupAnnotationsTestDB(t)
	createAnnotationTestUser(t, db, "did:plc:dave111", "dave.bsky.social")

	// Insert initial annotations
	initial := map[string]string{
		"key1": "value1",
		"key2": "value2",
	}

	err := UpsertRepositoryAnnotations(db, "did:plc:dave111", "emptyapp", initial)
	if err != nil {
		t.Fatalf("Initial UpsertRepositoryAnnotations() error = %v", err)
	}

	// Upsert with empty map (should delete all)
	empty := make(map[string]string)

	err = UpsertRepositoryAnnotations(db, "did:plc:dave111", "emptyapp", empty)
	if err != nil {
		t.Fatalf("Empty UpsertRepositoryAnnotations() error = %v", err)
	}

	// Verify all annotations were deleted
	retrieved, err := GetRepositoryAnnotations(db, "did:plc:dave111", "emptyapp")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations() error = %v", err)
	}

	if len(retrieved) != 0 {
		t.Errorf("Expected 0 annotations after empty upsert, got %d", len(retrieved))
	}
}

// TestUpsertRepositoryAnnotations_MultipleRepos tests isolation between repositories
func TestUpsertRepositoryAnnotations_MultipleRepos(t *testing.T) {
	db := setupAnnotationsTestDB(t)
	createAnnotationTestUser(t, db, "did:plc:eve222", "eve.bsky.social")

	// Insert annotations for repo1
	repo1Annotations := map[string]string{
		"repo": "repo1",
		"key1": "value1",
	}
	err := UpsertRepositoryAnnotations(db, "did:plc:eve222", "repo1", repo1Annotations)
	if err != nil {
		t.Fatalf("UpsertRepositoryAnnotations(repo1) error = %v", err)
	}

	// Insert annotations for repo2 (same DID, different repo)
	repo2Annotations := map[string]string{
		"repo": "repo2",
		"key2": "value2",
	}
	err = UpsertRepositoryAnnotations(db, "did:plc:eve222", "repo2", repo2Annotations)
	if err != nil {
		t.Fatalf("UpsertRepositoryAnnotations(repo2) error = %v", err)
	}

	// Verify repo1 annotations unchanged
	retrieved1, err := GetRepositoryAnnotations(db, "did:plc:eve222", "repo1")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations(repo1) error = %v", err)
	}
	if len(retrieved1) != len(repo1Annotations) {
		t.Errorf("repo1: Expected %d annotations, got %d", len(repo1Annotations), len(retrieved1))
	}
	if retrieved1["repo"] != "repo1" {
		t.Errorf("repo1: Expected repo=repo1, got %v", retrieved1["repo"])
	}

	// Verify repo2 annotations
	retrieved2, err := GetRepositoryAnnotations(db, "did:plc:eve222", "repo2")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations(repo2) error = %v", err)
	}
	if len(retrieved2) != len(repo2Annotations) {
		t.Errorf("repo2: Expected %d annotations, got %d", len(repo2Annotations), len(retrieved2))
	}
	if retrieved2["repo"] != "repo2" {
		t.Errorf("repo2: Expected repo=repo2, got %v", retrieved2["repo"])
	}
}

// TestDeleteRepositoryAnnotations tests deleting annotations
func TestDeleteRepositoryAnnotations(t *testing.T) {
	db := setupAnnotationsTestDB(t)
	createAnnotationTestUser(t, db, "did:plc:frank333", "frank.bsky.social")

	// Insert annotations
	annotations := map[string]string{
		"key1": "value1",
		"key2": "value2",
	}
	err := UpsertRepositoryAnnotations(db, "did:plc:frank333", "deleteapp", annotations)
	if err != nil {
		t.Fatalf("UpsertRepositoryAnnotations() error = %v", err)
	}

	// Verify annotations exist
	retrieved, err := GetRepositoryAnnotations(db, "did:plc:frank333", "deleteapp")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations() error = %v", err)
	}
	if len(retrieved) != 2 {
		t.Fatalf("Expected 2 annotations before delete, got %d", len(retrieved))
	}

	// Delete annotations
	err = DeleteRepositoryAnnotations(db, "did:plc:frank333", "deleteapp")
	if err != nil {
		t.Fatalf("DeleteRepositoryAnnotations() error = %v", err)
	}

	// Verify annotations were deleted
	retrieved, err = GetRepositoryAnnotations(db, "did:plc:frank333", "deleteapp")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations() after delete error = %v", err)
	}
	if len(retrieved) != 0 {
		t.Errorf("Expected 0 annotations after delete, got %d", len(retrieved))
	}
}

// TestDeleteRepositoryAnnotations_NonExistent tests deleting non-existent annotations
func TestDeleteRepositoryAnnotations_NonExistent(t *testing.T) {
	db := setupAnnotationsTestDB(t)

	// Delete from non-existent repository (should not error)
	err := DeleteRepositoryAnnotations(db, "did:plc:ghost999", "nonexistent")
	if err != nil {
		t.Errorf("DeleteRepositoryAnnotations() for non-existent repo should not error, got: %v", err)
	}
}

// TestAnnotations_DifferentDIDs tests isolation between different DIDs
func TestAnnotations_DifferentDIDs(t *testing.T) {
	db := setupAnnotationsTestDB(t)
	createAnnotationTestUser(t, db, "did:plc:alice123", "alice.bsky.social")
	createAnnotationTestUser(t, db, "did:plc:bob456", "bob.bsky.social")

	// Insert annotations for alice
	aliceAnnotations := map[string]string{
		"owner": "alice",
		"key1":  "alice-value1",
	}
	err := UpsertRepositoryAnnotations(db, "did:plc:alice123", "sharedname", aliceAnnotations)
	if err != nil {
		t.Fatalf("UpsertRepositoryAnnotations(alice) error = %v", err)
	}

	// Insert annotations for bob (same repo name, different DID)
	bobAnnotations := map[string]string{
		"owner": "bob",
		"key1":  "bob-value1",
	}
	err = UpsertRepositoryAnnotations(db, "did:plc:bob456", "sharedname", bobAnnotations)
	if err != nil {
		t.Fatalf("UpsertRepositoryAnnotations(bob) error = %v", err)
	}

	// Verify alice's annotations unchanged
	aliceRetrieved, err := GetRepositoryAnnotations(db, "did:plc:alice123", "sharedname")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations(alice) error = %v", err)
	}
	if aliceRetrieved["owner"] != "alice" {
		t.Errorf("alice: Expected owner=alice, got %v", aliceRetrieved["owner"])
	}

	// Verify bob's annotations
	bobRetrieved, err := GetRepositoryAnnotations(db, "did:plc:bob456", "sharedname")
	if err != nil {
		t.Fatalf("GetRepositoryAnnotations(bob) error = %v", err)
	}
	if bobRetrieved["owner"] != "bob" {
		t.Errorf("bob: Expected owner=bob, got %v", bobRetrieved["owner"])
	}
}