using API.Hashing;
using API.Hashing.Interfaces;
using DAL.Contexts;
using DAL.Models;
using DAL.Values;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;
using MySql.Data.MySqlClient;
using Mysqlx.Session;
using System.Configuration;
using System.Data.Common;

namespace Setup
{
	internal class Program
	{
		public static bool lineIsYes(string? input)
		{
			if (input == null)
				return false;

			input = input.Trim().ToLower();
			switch (input)
			{
				case "y":
				case "yes":
					return true;
				case "n":
				case "no":
					return false;
				default:
					return false;
			}
		}

		public static string getStringWithConfirmation(string message)
		{
			while (true)
			{
				Console.Write(message);
				string? input = Console.ReadLine();
				Console.WriteLine();
				if (input == null)
					continue;

				Console.Write($"Is '{input}' correct? [Y/N]: ");
				if (lineIsYes(Console.ReadLine()))
				{
					Console.WriteLine();
					return input;
				}

				Console.WriteLine();
			}
		}

		public static void Main(string[] args)
		{
			Console.Write("Entering setup. Only run this once. Will reinstate database. Continue? [Y/N]: ");
			if (!lineIsYes(Console.ReadLine()))
				System.Environment.Exit(0);
			Console.WriteLine();

			string connectionString = getStringWithConfirmation("Enter connection string: ");

			DbContextOptionsBuilder<SASGContext> optionsBuilder = new DbContextOptionsBuilder<SASGContext>();
			optionsBuilder.UseMySQL(connectionString);
			
			SASGContext context = new SASGContext(optionsBuilder.Options);

			string firstName = getStringWithConfirmation("Enter admin first name: ");
			string lastname = getStringWithConfirmation("Enter admin last name: ");
			PhoneNumber phoneNumber = getStringWithConfirmation("Enter admin phone number: ");
			string unHashedPassword = getStringWithConfirmation("Enter admin password: ");

			HashingType defaultHashingType = Enum.Parse<HashingType>(
				getStringWithConfirmation($"Enter default hashing type [{String.Join(", ", Enum.GetNames(typeof(HashingType)))}]: "));

			IHashingFactory hashingFactory = new HashingFactory();
			IHashingAlgorithm algorithm = hashingFactory.getAlgorithm(defaultHashingType) ?? throw new InvalidOperationException();

			byte[] salt;
			string password = algorithm.hash(unHashedPassword, out salt);
			
			Console.Write("About to touch db. Continue? [Y/N]: ");
			if (!lineIsYes(Console.ReadLine()))
				System.Environment.Exit(0);

			MySqlConnection conn = (MySqlConnection) context.Database.GetDbConnection();
			
			conn.Open();
			using (MySqlCommand reader = new MySqlCommand(File.ReadAllText("Filler/Permissions.sql"), conn))
			{
				reader.ExecuteNonQuery();
			}

			using (MySqlCommand reader = new MySqlCommand(File.ReadAllText("Filler/Grants.sql"), conn))
			{
				reader.ExecuteNonQuery();
			}
			conn.Close();

			context.users.Add(new User
			{
				firstName = firstName,
				lastName = lastname,
				phoneNumber = phoneNumber,
				password = password,
				salt = salt,
				hashingType = defaultHashingType,
				permissionId = 1,
			});
			context.SaveChanges();
		}
	}
}