using System.Data.SqlClient;
using Twilio;
using Twilio.Types;
using Twilio.Rest.Api.V2010.Account;

public class TwilioDDT
{
    Dictionary<string, string> results = new Dictionary<string, string>();

    public static void Main(string[] args)
    {
        string PhoneNumber = "";
        string[] NumbersToText = ["248-891-3712"];

        TextAgent agent = new TextAgent(PhoneNumber, NumbersToText);
        var message = "";

        var results = agent.SendTexts(message);
        Console.WriteLine(results.ToString());
    }

    public class TextAgent
    {
        // Class Variables
        PhoneNumber PhoneNumber; // Number to send from
        string[] InputNumbers = Array.Empty<string>(); // Numbers to blast to

        public TextAgent(string ShopNumber, string[] TargetList)
        {
            PhoneNumber = new PhoneNumber(ShopNumber);
            InputNumbers = TargetList;
        }



        public Dictionary<string, string> SendTexts(string GenericMessage)
        {
            if (InputNumbers.Length < 1 || GenericMessage.Length < 1)
            {
                // Input data is invalid; do not initiate sequence

                // 
                return new Dictionary<string, string>();
            }

            // Initialize SQL Agent
            SqlDriver db = new SqlDriver("CONN_STRING");
            db.GatherUsers("SQL_QUERY_TO_GET_USERS");
            // TODO: read values from table into list

            var result = new Dictionary<string, string>();
            foreach (string current in InputNumbers) // TODO: replace this with the rows in db 
            {
                // TODO: Use values from SQL list as the fields here

                // Logic to add customer's name in the generic message
                Console.WriteLine(GenericMessage);
                var custName = "Josh Deck"; // Replace with lookup when data is provided
                var properMessage = string.Format("Hi {},\nStop in at Global Oil Change Center during the month of May and get $10 Off your Full Synthetic Oil Change and a free set of wiper blades. Show this text to receive discount. From your friends at Global Oil in Troy. Please reply STOP to end texts.", custName);
                var currentResult = SendMessage(properMessage, current);
                result.Add(currentResult[0], currentResult[1]);
            }

            return result;
        }



        private string[] SendMessage(string Message, string Destination)
        {
            var result = new string[] { };
            var DestinationNumber = new PhoneNumber(Destination);
            try
            {
                TwilioClient.Init(Credentials.TwilioSID, Credentials.TwilioAuthToken);
                var message = MessageResource.Create(
                    to: DestinationNumber,
                    from: PhoneNumber,
                    body: Message
                );

                result = [Destination, Message];
            }
            catch (Exception ex)
            {
                result = [Destination, ex.Message];
            }
            return result;
        }
    }

    public class SqlDriver
    {
        private SqlConnection? conn = null;
        private List<Dictionary<string, string>>? data = null;

        public SqlDriver(string connectionString) 
        {
            conn = new SqlConnection(connectionString);
        }
        public void GatherUsers(string query)
        {
            if (conn == null || data != null)
            {
                // Report error
                return;
            }

            data = new List<Dictionary<string, string>> { };
            using (SqlCommand command = new SqlCommand(query, conn))
            {
                try
                {
					conn.Open();
					SqlDataReader reader = command.ExecuteReader();

                    Dictionary<string, string> column;
                    while (reader.Read())
                    {
                        // Empty out the column 
                        column = new Dictionary<string, string>();

                        // Read the data from the table
                        // TODO: get actual fields needed
                        column["NAME"] = reader["NAME"].ToString();

                        data.Add(column);
					}
					conn.Close();
				}
				catch
                {
                    // Handle the error and/or cry
                }
			}              
                
        }
        public void ReportText()
        {
			if (conn == null)
			{
				// Report error
				return;
			}

            using (SqlCommand command = new SqlCommand("PROCEDURE_NAME", conn) { CommandType = System.Data.CommandType.StoredProcedure })
            {
                // TODO: add parameters to SP
                conn.Open();
                command.ExecuteNonQuery();
            }
		}
    }
}