@page "/"
@rendermode InteractiveServer

<PageTitle>Home</PageTitle>

<div class="main-area">

    <!-- Login Frame -->
    @if (Session == null){
        <div class="gridFrame">
            <div><h2>LOGIN</h2></div>
            <div class="loginRow">
                <div><span>username</span></div>
                <input @bind-value="userName" type="text" />
            </div>
            <div class="loginRow">
                <div><span>password</span></div>
                <input @bind-value="passWord" type="password" />
            </div>
            <div class="loginRow">
                <button @onclick="LoginSession">Login</button>
                <button @onclick="registerSession">Register</button>
            </div>
            <div>
                <span style="color: red;">@loginError</span>
            </div>
        </div>

    <!-- User Frame -->
    }else{
        <div class="gridFrame">
            <span>UserName: @Session.UserName</span><br />
            <div>
                @foreach(PurchasedStock cur in Session.TrackedStocks){
                    <div>@cur.Symbol</div>
                    <div>@cur.Quantity</div>
                    <div>@cur.PurchasePrice</div>
                    <div>@cur.PurchaseDate.ToString("M-D-YYYY")</div>
                }
            </div>
        </div>
    <!-- Tool Frame -->
        <div class="gridFrame">
            <div>
                <span>Actions</span>
                <button @onclick="pull">@pullButtonText</button>
                <button @onclick="train">@trainButtonText</button>
                <button @onclick="predict">@predictButtonText</button>
                <span>@PredictError</span>
            </div>
        </div>
    }
    
    <!-- AI Frame -->
    <div class="gridFrame">
        <div>
            
        </div>
        <div>
            @foreach (stockPredictionPair cur in predictions){
                <div>
                    <h1>Symbol: @cur.Symbol</h1><br />
                @if (cur.Movement == -1){
                    <p>Sell</p>
                } else if (cur.Movement == 1){
                    <p>Buy</p>
                } else{
                    <p>Hold</p>
                }
                </div>
            }
        </div>
    </div>

</div>


@code {

    // User Stuff
    loginSession? Session = null;

    // Login Stuff
    string userName = "";
    string passWord = "";
    string loginError = "";

    List<stockPredictionPair> predictions = new List<stockPredictionPair>(){
      new stockPredictionPair(){ Symbol = "AAPL" },
      new stockPredictionPair(){ Symbol = "AAPL" },
      new stockPredictionPair(){ Symbol = "TTD" },
      new stockPredictionPair(){ Symbol = "FUN" }
    };

    async Task LoginSession(){
        string dbPrefix = $"[{userName.ToLower()}]:";                   // Set the DB prefix for the get and set
        string passwordhash = dbDriver.Get( dbPrefix + "password" );    // Pull the password hash
        if (BCrypt.Verify( passWord, passwordhash )){                   // If the password is valid
            List<PurchasedStock>? stocks = JsonConvert.DeserializeObject<List<PurchasedStock>>( dbDriver.Get( dbPrefix + "stock-data" ) );
            Session = new loginSession(){
                UserName = userName.ToLower(),
                TrackedStocks = stocks != null ? stocks : new List<PurchasedStock>()
            };
        }else{
            loginError = "wrong password";
        }
    }

    async Task registerSession(){
        string dbPrefix = $"[{userName.ToLower()}]:";
        string passwordhash = dbDriver.Get( dbPrefix + "password" );
        if (string.IsNullOrEmpty(passwordhash)){
            dbDriver.Set( dbPrefix + "password", BCrypt.HashPassword( passWord, BCrypt.GenerateSalt() ) );
            Session = new loginSession(){
                UserName = userName.ToLower(),
                TrackedStocks = new List<PurchasedStock>()
            };
        }else{
            loginError = "account is taken";
        }
    }

    // AI Stuff

    string pullButtonText = "Pull Data";
    string trainButtonText = "Train AI";
    string predictButtonText = "Predict AI";
    string PredictError = "";

    bool pullDebounce = true;
    async Task pull(){
        PredictError = "";
        if (pullDebounce){
            pullDebounce = false;
            pullButtonText = "Do not refresh the page. The data is pulling.";
            await Task.Delay(1);
            Task thread = new Task(async () => {
                aiModule.PullAI();
                pullButtonText = "Data pulled";
                await InvokeAsync(StateHasChanged);
                await Task.Delay(2000);
                pullButtonText = "Pull Data";
                await InvokeAsync(StateHasChanged);
                pullDebounce = true;
            });
            thread.Start();
        }
    }

    bool trainDebounce = true;
    async Task train(){
        PredictError = "";
        if (trainDebounce){
            trainDebounce = false;
            trainButtonText = "Do not refresh the page. The AI is training.";
            await Task.Delay(1);
            Task thread = new Task(async () => {
                aiModule.TrainAI();
                trainButtonText = "AI Trained";
                StateHasChanged();
                await Task.Delay(2000);
                trainButtonText = "Train AI";
                StateHasChanged();
                trainDebounce = true;
            });
            thread.Start();
        }
    }

    async Task predict(){
        PredictError = "";
        predictButtonText = "Do not refresh the page. The AI is predicting";
        await Task.Delay(1);
        List<Task> threadpool = new List<Task>();
        foreach(stockPredictionPair cur in predictions){
            Task thread = new Task(() => {
                (string, int)Result = aiModule.PredictAI(cur.Symbol);
                if (string.IsNullOrEmpty(Result.Item1)){
                    cur.Movement = Result.Item2;
                }else{
                    PredictError = Result.Item1;
                }
                Console.WriteLine("Received Signal [" + cur.Symbol + "] : " + cur.Movement);
            });
            thread.Start();
            threadpool.Add(thread);
        }
        await Task.WhenAll(threadpool);
        predictButtonText = "Predictions loaded";
        await Task.Delay(2000);
        predictButtonText = "Predict AI";
    }

    // Data Types

    class stockPredictionPair {
        public string Symbol { get; set; }  = "";
        public int Movement { get; set; } = 0;
    }

    class loginSession {
        public string UserName { get; set; } = "";
        public List<PurchasedStock> TrackedStocks { get; set; } = new List<PurchasedStock>();
    }

    class PurchasedStock {
        public string Symbol { get; set; } = "";
        public float PurchasePrice { get; set; } = 0;
        public float Quantity { get; set; } = 0;
        public DateTime PurchaseDate { get; set; } = DateTime.Now;
    }

}