using Controllers.DataBase;
using Entities;
using Newtonsoft.Json;

namespace Controllers.PythonInterop {
    
    public class Automation {

        AIModule _aiModule;
        DbDriver _dbDriver;
        public Automation(AIModule aiModule, DbDriver dbDriver) {
            _aiModule = aiModule;
            _dbDriver = dbDriver;
        }

        public void GlobalPredictAI() {

            // Start this process on a background thread so its non-blocking
            Task thread = new Task(async () => {

                // Load the userlist
                List<string>? UserList = JsonConvert.DeserializeObject<List<string>>(_dbDriver.Get("Users"));
                List<string> VerifiedUserList = UserList != null ? UserList : new List<string>();

                // Process each request at the same time for speed improvement
                Parallel.ForEach(VerifiedUserList, async (username) => {
                    string dbPrefix = $"[{username.ToLower()}]:";

                    // Load the Tracked stocks for each user
                    List<Stock>? TrackedStocks = JsonConvert.DeserializeObject<List<Stock>>( _dbDriver.Get( dbPrefix + "watched" ) );
                    List<Stock> VerifiedTrackedStocks = TrackedStocks != null ? TrackedStocks : new List<Stock>();

                    // Go through each stock
                    List<Task> threadpool = new List<Task>();
                    foreach(Stock cur in VerifiedTrackedStocks) {
                    
                        // Predict the trend on a new thread
                        Task thread = new Task(() => {
                            (string, float)Result = _aiModule.PredictAI(cur.Symbol);

                            // If error log it
                            if (!string.IsNullOrEmpty(Result.Item1)){
                                Console.WriteLine(Result.Item1);
                            }

                            // Write the score to the users tracked stocks
                            cur.Score = Result.Item2;
                        });
                        thread.Start();
                        threadpool.Add(thread);
                    }

                    // Wait for all the threads to finish
                    await Task.WhenAll(threadpool);

                    // Process Stocks -> Buy Sell Hold / Based on the global data from earlier

                    // Save the new scores to the database for reference from the UI
                    _dbDriver.Set( dbPrefix + "watched", JsonConvert.SerializeObject( VerifiedTrackedStocks ) );

                });
            });
            thread.Start();
        }

        public void GlobalTrainAI(){
            Task thread = new Task(async () => {
                _aiModule.TrainAI();
            });
            thread.Start();
        }

        void sellStock(PurchasedStock stock){
            string dbPrefix = $"[{userName.ToLower()}]:";
            if (Session != null){

                // Get sell price
                float sellPrice = stock.Quantity * aiModule.GetCurrentPrice( stock.Symbol );

                // Try to sell the stock
                (bool, string) result = PaymentProcessor.TrySell(PaymentKey, sellPrice);
                if (!result.Item1){
                    resultError = result.Item2;
                    return;
                }

                // Remove Stock
                Session.TradeHistory.Remove(stock);
                dbDriver.Set( dbPrefix + "Stocks", Newtonsoft.Json.JsonConvert.SerializeObject(Session.TradeHistory) );

                // Reload the users money
                bool moneyLoaded = float.TryParse(dbDriver.Get( dbPrefix + "money" ), out float moneyResult);
                Session.Money = moneyLoaded ? moneyResult : 1000;
                
                // Reset the Impodent Key
                result = PaymentProcessor.CreatePayment(Session.UserName);
                if (!result.Item1){
                    resultError = "[New payment session failed] : " + result.Item2;
                    return;
                }
                PaymentKey = result.Item2;
            }
        }

        void buyStock(string StockSymbol){
            if (Session != null){
                string dbPrefix = $"[{userName.ToLower()}]:";
                
                // Try Parse the quantitiy input
                // Get the max quantity that I can Afford
                float QuantityResult = 0;

                // Get Stock Price
                float stockPrice = aiModule.GetCurrentPrice( StockSymbol );

                // Try Pay for the stock
                (bool, string) result = PaymentProcessor.TryPayment(PaymentKey, QuantityResult * stockPrice);
                if (!result.Item1){
                    resultError = result.Item2;
                    return;
                }

                // Add the stock
                Session.TradeHistory.Add( new PurchasedStock(){
                    Symbol = StockSymbol.ToUpper(),
                    PurchasePrice = stockPrice,
                    Quantity = QuantityResult,
                } );
                dbDriver.Set( dbPrefix + "Stocks", Newtonsoft.Json.JsonConvert.SerializeObject(Session.TradeHistory) );

                // Reload the users money
                bool moneyLoaded = float.TryParse(dbDriver.Get( dbPrefix + "money" ), out float moneyResult);
                Session.Money = moneyLoaded ? moneyResult : 1000;

                // Reset the Impodent Key
                result = PaymentProcessor.CreatePayment(Session.UserName);
                if (!result.Item1){
                    resultError = "[New payment session failed] : " + result.Item2;
                    return;
                }
                PaymentKey = result.Item2;
            }
        }
    }
}