package backup

import (
	"database/sql"
	"fmt"
	"log"
	_ "github.com/go-sql-driver/mysql"
	"pixelridgesoftworks.com/BackGo/config"
)

type DBManager struct {
	DB *sql.DB
}

// NewDBManager creates a new DBManager instance using the provided configuration
func NewDBManager(cfg *config.Config) *DBManager {
	dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?parseTime=true",
		cfg.MySQLUser, cfg.MySQLPassword, cfg.MySQLHost, cfg.MySQLPort, cfg.MySQLDBName)

	db, err := sql.Open("mysql", dsn)
	if err != nil {
		log.Fatalf("Could not connect to MySQL: %v", err)
	}

	if err := db.Ping(); err != nil {
		log.Fatalf("Could not ping MySQL: %v", err)
	}

	manager := &DBManager{DB: db}
	manager.InitDB()

	return manager
}

// InitDB initializes the database tables
func (manager *DBManager) InitDB() {
	// Creating a tokens table
	createTokensTableSQL := `CREATE TABLE IF NOT EXISTS tokens (
        token VARCHAR(255) PRIMARY KEY,
        hostname VARCHAR(255) NOT NULL UNIQUE
    );`

	if _, err := manager.DB.Exec(createTokensTableSQL); err != nil {
		log.Fatalf("Failed to create tokens table: %v", err)
	}
}

func (manager *DBManager) AddToken(token, hostname string) error {
	_, err := manager.DB.Exec("INSERT INTO tokens (token, hostname) VALUES (?, ?)", token, hostname)
	if err != nil {
		log.Printf("Failed to add token: %v", err)
		return err
	}
	return nil
}

func (manager *DBManager) VerifyToken(token string) bool {
	var retrievedToken string
	err := manager.DB.QueryRow("SELECT token FROM tokens WHERE token = ?", token).Scan(&retrievedToken)
	if err != nil {
		if err != sql.ErrNoRows {
			log.Printf("Failed to verify token: %v", err)
		}
		return false
	}
	return true
}

func (manager *DBManager) RemoveToken(token string) error {
	_, err := manager.DB.Exec("DELETE FROM tokens WHERE token = ?", token)
	if err != nil {
		log.Printf("Failed to remove token: %v", err)
		return err
	}
	return nil
}