package db

import "time"

// APIKeyRepository defines operations for API key management
type APIKeyRepository interface {
	CreateKey(hash, name string, expiresAt *time.Time) error
	GetActiveKeyHash() (string, error)
	DeactivateKey(id int) error
}

// SQLiteAPIKeyRepository implements APIKeyRepository for SQLite
type SQLiteAPIKeyRepository struct {
	db Database
}

// NewSQLiteAPIKeyRepository creates a new SQLite API key repository
func NewSQLiteAPIKeyRepository(db Database) *SQLiteAPIKeyRepository {
	return &SQLiteAPIKeyRepository{db: db}
}

func (r *SQLiteAPIKeyRepository) CreateKey(hash, name string, expiresAt *time.Time) error {
	_, err := r.db.Exec(`
		INSERT INTO api_keys (key_hash, name, expires_at)
		VALUES (?, ?, ?)
	`, hash, name, expiresAt)
	return err
}

func (r *SQLiteAPIKeyRepository) GetActiveKeyHash() (string, error) {
	var hash string
	err := r.db.QueryRow(`
		SELECT key_hash FROM api_keys 
		WHERE is_active = TRUE 
		AND (expires_at IS NULL OR expires_at > CURRENT_TIMESTAMP)
	`).Scan(&hash)
	return hash, err
}

func (r *SQLiteAPIKeyRepository) DeactivateKey(id int) error {
	_, err := r.db.Exec(`
		UPDATE api_keys 
		SET is_active = FALSE 
		WHERE id = ?
	`, id)
	return err
}

// PeerRepository defines operations for peer management
type PeerRepository interface {
	AddPeer(url, publicKeyPEM string) error
	ListTrustedPeers() ([]struct {
		URL       string
		PublicKey string
	}, error)
}

// SQLitePeerRepository implements PeerRepository for SQLite
type SQLitePeerRepository struct {
	db Database
}

// NewSQLitePeerRepository creates a new SQLite peer repository
func NewSQLitePeerRepository(db Database) *SQLitePeerRepository {
	return &SQLitePeerRepository{db: db}
}

func (r *SQLitePeerRepository) AddPeer(url, publicKeyPEM string) error {
	_, err := r.db.Exec(`
		INSERT INTO peers (url, public_key_pem)
		VALUES (?, ?)
	`, url, publicKeyPEM)
	return err
}

func (r *SQLitePeerRepository) ListTrustedPeers() ([]struct {
	URL       string
	PublicKey string
}, error) {
	rows, err := r.db.Query(`
		SELECT url, public_key_pem FROM peers
	`)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	var peers []struct {
		URL       string
		PublicKey string
	}
	for rows.Next() {
		var peer struct {
			URL       string
			PublicKey string
		}
		if err := rows.Scan(&peer.URL, &peer.PublicKey); err != nil {
			return nil, err
		}
		peers = append(peers, peer)
	}
	return peers, nil
}

// CreateTables creates the necessary database tables
func CreateTables(db Database) error {
	_, err := db.Exec(`
		CREATE TABLE IF NOT EXISTS api_keys (
			id INTEGER PRIMARY KEY AUTOINCREMENT,
			key_hash TEXT NOT NULL UNIQUE,
			name TEXT NOT NULL,
			created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
			expires_at TIMESTAMP,
			is_active BOOLEAN DEFAULT TRUE
		);

		CREATE TABLE IF NOT EXISTS peers (
			id INTEGER PRIMARY KEY AUTOINCREMENT,
			url TEXT NOT NULL UNIQUE,
			public_key_pem TEXT NOT NULL,
			created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
		);
	`)
	return err
}