package db

import (
	"fmt"
	"testing"
	"time"
)

func TestDeleteUserDataFull_DeletesAllData(t *testing.T) {
	db, err := InitDB(":memory:", LibsqlConfig{})
	if err != nil {
		t.Fatalf("Failed to init database: %v", err)
	}
	defer db.Close()

	// Create test user
	testUser := &User{
		DID:         "did:plc:test123",
		Handle:      "test.bsky.social",
		PDSEndpoint: "https://bsky.social",
		LastSeen:    time.Now(),
	}
	if err := UpsertUser(db, testUser); err != nil {
		t.Fatalf("Failed to create user: %v", err)
	}

	// Create manifest
	_, err = db.Exec(`
		INSERT INTO manifests (manifest_key, did, repository, digest, hold_endpoint, schema_version, media_type, created_at)
		VALUES (?, ?, ?, ?, ?, ?, ?, ?)
	`, ManifestKey(testUser.DID, "myapp", "sha256:abc123"),
		testUser.DID, "myapp", "sha256:abc123", "did:web:hold.example.com", 2,
		"application/vnd.oci.image.manifest.v1+json", time.Now())
	if err != nil {
		t.Fatalf("Failed to create manifest: %v", err)
	}

	// Create tag
	_, err = db.Exec(`
		INSERT INTO tags (did, repository, tag, digest, created_at)
		VALUES (?, ?, ?, ?, ?)
	`, testUser.DID, "myapp", "latest", "sha256:abc123", time.Now())
	if err != nil {
		t.Fatalf("Failed to create tag: %v", err)
	}

	// Create hold membership data (non-cascading)
	_, err = db.Exec(`
		INSERT INTO hold_crew_approvals (hold_did, user_did, approved_at, expires_at)
		VALUES (?, ?, ?, ?)
	`, "did:web:hold.example.com", testUser.DID, time.Now(), time.Now().Add(24*time.Hour))
	if err != nil {
		t.Fatalf("Failed to create crew approval: %v", err)
	}

	_, err = db.Exec(`
		INSERT INTO hold_crew_members (hold_did, member_did, rkey, permissions)
		VALUES (?, ?, ?, ?)
	`, "did:web:hold.example.com", testUser.DID, "member1", `["blob:read","blob:write"]`)
	if err != nil {
		t.Fatalf("Failed to create crew member: %v", err)
	}

	// Create OAuth store
	oauthStore := NewOAuthStore(db)

	// Delete all user data
	err = DeleteUserDataFull(db, oauthStore, testUser.DID)
	if err != nil {
		t.Fatalf("DeleteUserDataFull failed: %v", err)
	}

	// Verify user was deleted
	var count int
	err = db.QueryRow("SELECT COUNT(*) FROM users WHERE did = ?", testUser.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query users: %v", err)
	}
	if count != 0 {
		t.Error("Expected user to be deleted")
	}

	// Verify manifests were cascade deleted
	err = db.QueryRow("SELECT COUNT(*) FROM manifests WHERE did = ?", testUser.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query manifests: %v", err)
	}
	if count != 0 {
		t.Error("Expected manifests to be cascade deleted")
	}

	// Verify tags were cascade deleted
	err = db.QueryRow("SELECT COUNT(*) FROM tags WHERE did = ?", testUser.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query tags: %v", err)
	}
	if count != 0 {
		t.Error("Expected tags to be cascade deleted")
	}

	// Verify hold membership data was deleted
	err = db.QueryRow("SELECT COUNT(*) FROM hold_crew_approvals WHERE user_did = ?", testUser.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query crew approvals: %v", err)
	}
	if count != 0 {
		t.Error("Expected crew approvals to be deleted")
	}

	err = db.QueryRow("SELECT COUNT(*) FROM hold_crew_members WHERE member_did = ?", testUser.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query crew members: %v", err)
	}
	if count != 0 {
		t.Error("Expected crew members to be deleted")
	}
}

func TestDeleteUserDataFull_DoesNotAffectOtherUsers(t *testing.T) {
	db, err := InitDB(":memory:", LibsqlConfig{})
	if err != nil {
		t.Fatalf("Failed to init database: %v", err)
	}
	defer db.Close()

	// Create two users
	user1 := &User{
		DID:         "did:plc:user1",
		Handle:      "user1.bsky.social",
		PDSEndpoint: "https://bsky.social",
		LastSeen:    time.Now(),
	}
	user2 := &User{
		DID:         "did:plc:user2",
		Handle:      "user2.bsky.social",
		PDSEndpoint: "https://bsky.social",
		LastSeen:    time.Now(),
	}
	if err := UpsertUser(db, user1); err != nil {
		t.Fatalf("Failed to create user1: %v", err)
	}
	if err := UpsertUser(db, user2); err != nil {
		t.Fatalf("Failed to create user2: %v", err)
	}

	// Create manifests for both users
	for _, user := range []*User{user1, user2} {
		_, err = db.Exec(`
			INSERT INTO manifests (manifest_key, did, repository, digest, hold_endpoint, schema_version, media_type, created_at)
			VALUES (?, ?, ?, ?, ?, ?, ?, ?)
		`, ManifestKey(user.DID, "myapp", "sha256:"+user.DID),
			user.DID, "myapp", "sha256:"+user.DID, "did:web:hold.example.com", 2,
			"application/vnd.oci.image.manifest.v1+json", time.Now())
		if err != nil {
			t.Fatalf("Failed to create manifest for %s: %v", user.Handle, err)
		}
	}

	// Create hold membership data for both users
	for i, user := range []*User{user1, user2} {
		_, err = db.Exec(`
			INSERT INTO hold_crew_members (hold_did, member_did, rkey, permissions)
			VALUES (?, ?, ?, ?)
		`, "did:web:hold.example.com", user.DID, fmt.Sprintf("member%d", i+1), `["blob:read"]`)
		if err != nil {
			t.Fatalf("Failed to create crew member for %s: %v", user.Handle, err)
		}
	}

	oauthStore := NewOAuthStore(db)

	// Delete only user1's data
	err = DeleteUserDataFull(db, oauthStore, user1.DID)
	if err != nil {
		t.Fatalf("DeleteUserDataFull failed: %v", err)
	}

	// Verify user1 was deleted
	var count int
	err = db.QueryRow("SELECT COUNT(*) FROM users WHERE did = ?", user1.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query users: %v", err)
	}
	if count != 0 {
		t.Error("Expected user1 to be deleted")
	}

	// Verify user2 still exists
	err = db.QueryRow("SELECT COUNT(*) FROM users WHERE did = ?", user2.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query users: %v", err)
	}
	if count != 1 {
		t.Error("Expected user2 to still exist")
	}

	// Verify user2's manifests still exist
	err = db.QueryRow("SELECT COUNT(*) FROM manifests WHERE did = ?", user2.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query manifests: %v", err)
	}
	if count != 1 {
		t.Error("Expected user2's manifest to still exist")
	}

	// Verify user2's crew membership still exists
	err = db.QueryRow("SELECT COUNT(*) FROM hold_crew_members WHERE member_did = ?", user2.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query crew members: %v", err)
	}
	if count != 1 {
		t.Error("Expected user2's crew membership to still exist")
	}
}

func TestDeleteUserDataFull_HandlesNonExistentUser(t *testing.T) {
	db, err := InitDB(":memory:", LibsqlConfig{})
	if err != nil {
		t.Fatalf("Failed to init database: %v", err)
	}
	defer db.Close()

	oauthStore := NewOAuthStore(db)

	// Try to delete non-existent user - should not error
	err = DeleteUserDataFull(db, oauthStore, "did:plc:nonexistent")
	if err != nil {
		t.Errorf("Expected no error for non-existent user, got: %v", err)
	}
}

func TestDeleteUserDataFull_WithNilOAuthStore(t *testing.T) {
	db, err := InitDB(":memory:", LibsqlConfig{})
	if err != nil {
		t.Fatalf("Failed to init database: %v", err)
	}
	defer db.Close()

	testUser := &User{
		DID:         "did:plc:test123",
		Handle:      "test.bsky.social",
		PDSEndpoint: "https://bsky.social",
		LastSeen:    time.Now(),
	}
	if err := UpsertUser(db, testUser); err != nil {
		t.Fatalf("Failed to create user: %v", err)
	}

	// Delete with nil OAuth store - should still work
	err = DeleteUserDataFull(db, nil, testUser.DID)
	if err != nil {
		t.Errorf("Expected no error with nil OAuth store, got: %v", err)
	}

	// Verify user was deleted
	var count int
	err = db.QueryRow("SELECT COUNT(*) FROM users WHERE did = ?", testUser.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query users: %v", err)
	}
	if count != 0 {
		t.Error("Expected user to be deleted")
	}
}

func TestDeleteUserDataFull_DeletesDenials(t *testing.T) {
	db, err := InitDB(":memory:", LibsqlConfig{})
	if err != nil {
		t.Fatalf("Failed to init database: %v", err)
	}
	defer db.Close()

	testUser := &User{
		DID:         "did:plc:test123",
		Handle:      "test.bsky.social",
		PDSEndpoint: "https://bsky.social",
		LastSeen:    time.Now(),
	}
	if err := UpsertUser(db, testUser); err != nil {
		t.Fatalf("Failed to create user: %v", err)
	}

	// Create denial record
	_, err = db.Exec(`
		INSERT INTO hold_crew_denials (hold_did, user_did, denial_count, next_retry_at, last_denied_at)
		VALUES (?, ?, ?, ?, ?)
	`, "did:web:hold.example.com", testUser.DID, 1, time.Now().Add(24*time.Hour), time.Now())
	if err != nil {
		t.Fatalf("Failed to create crew denial: %v", err)
	}

	oauthStore := NewOAuthStore(db)

	err = DeleteUserDataFull(db, oauthStore, testUser.DID)
	if err != nil {
		t.Fatalf("DeleteUserDataFull failed: %v", err)
	}

	// Verify denial was deleted
	var count int
	err = db.QueryRow("SELECT COUNT(*) FROM hold_crew_denials WHERE user_did = ?", testUser.DID).Scan(&count)
	if err != nil {
		t.Fatalf("Failed to query crew denials: %v", err)
	}
	if count != 0 {
		t.Error("Expected crew denials to be deleted")
	}
}