using Controllers.DataBase;

namespace Controllers.Payment {

    public class PaymentTestor : IPayment {
        
        static List<ImpodentKey> ImpodentKeys = new List<ImpodentKey>();
        DbDriver? _DBdriver = null;

        // Inject the DB driver
        public PaymentTestor() { _DBdriver = new DbDriver(); }

        public (bool, string) CreatePayment(string user) {
            string guid = Guid.NewGuid().ToString();
            ImpodentKeys.Add(new ImpodentKey{ Key = guid, User = user });
            return (true, guid);
        }

        public (bool, string) TryPayment(string ImpodentKey, float Price) {
            try {
                // Find the impotency key
                ImpodentKey? found = null;
                foreach( ImpodentKey key in ImpodentKeys) {
                    if (key.Key == ImpodentKey) {
                        found = key;
                        break;
                    }
                }
                if (found == null) {
                    return (false, "Payment session closed or never existed");
                }

                // Make sure the database is injected correctly
                if (_DBdriver == null) {
                    found.Processed = true;
                    return (false, "The Database cannot be loaded");
                }

                // Get the users money
                string dbPrefix = $"[{found.User.ToLower()}]:";
                bool passed = float.TryParse(_DBdriver.Get( dbPrefix + "money" ), out float result);
                if (!passed) {
                    found.Processed = true;
                    return (false, "Unable to parse money from the database");
                }

                // Make sure the user has enough money
                if (result < Price) {
                    found.Processed = true;
                    return (false, "You dont have enough money to purchase this item");
                }

                // Remove the money and save
                // _DBdriver.Set( dbPrefix + "money", (result - Price).ToString()); -> Dont save in here as its done externally for thread safty
                found.PaymentSuccess = true;
                found.Processed = true;
                return (true, "");

            }catch(Exception e) {
                return (false, e.ToString());
            }
        }

        public (bool, string) TrySell(string ImpodentKey, float Price) {
            // Find the impotency key
            ImpodentKey? found = null;
            foreach( ImpodentKey key in ImpodentKeys) {
                if (key.Key == ImpodentKey) {
                    found = key;
                    break;
                }
            }
            if (found == null) {
                return (false, "Payment session closed or never existed");
            }

            // Make sure the database is injected correctly
            if (_DBdriver == null) {
                found.Processed = true;
                return (false, "The Database cannot be loaded");
            }

            // Get the users money
            string dbPrefix = $"[{found.User.ToLower()}]:";
            bool passed = float.TryParse(_DBdriver.Get( dbPrefix + "money" ), out float result);
            if (!passed) {
                found.Processed = true;
                return (false, "Unable to parse money from the database");
            }

            // Add the money and save
            // _DBdriver.Set( dbPrefix + "money", (result + Price).ToString()); -> Dont save in here as its done externally for thread safty
            found.PaymentSuccess = true;
            found.Processed = true;
            return (true, "");
        }
    }

    class ImpodentKey {
        public string Key { get; set; } = "";
        public string User { get; set; } = "";
        public bool PaymentSuccess { get; set; } = false;
        public bool Processed { get; set; } = false;
    }

}