import model
import sys
import stocks
import view
import database


"""
    This is the controller file
"""


def process_drop(this_stock):
    """
    Processes call when the action is "DROP"
    :param this_stock:
    :return:
    """
    global db
    global timestamp_previous
    global timestamp_latest
    stock_id = this_stock[1]
    data_previous = model.get_data(stock_id, timestamp_previous, db)
    data_latest = model.get_data(stock_id, timestamp_latest, db)
    threshold = this_stock[3]
    max_price = this_stock[2]
    is_drop = model.process_data(data_previous, data_latest, max_price, threshold)
    current_price = float(data_latest.current_price)
    quantity = data_latest.available_shares - data_previous.available_shares
    stock_name = this_stock[0]
    npc_drop = False
    total_stocks = data_latest.total_shares
    if model.is_npc_drop(data_previous, data_latest):
        npc_drop = True
    message = view.create_message(
        stock_name, timestamp_latest, current_price, quantity, current_quantity=total_stocks, npc_drop=npc_drop)
    print(message)
    if is_drop:
        view.broadcast(message)


def process_forecast(this_stock):
    """
    Processes FORECAST requests
    :param this_stock:
    :return:
    """
    global db
    global timestamp_previous
    global timestamp_latest
    stock_id = this_stock[1]
    data_previous = model.get_data(stock_id, timestamp_previous, db)
    data_latest = model.get_data(stock_id, timestamp_latest, db)
    available = this_stock[3]
    max_price = this_stock[2]
    forecast_previous = data_previous.forecast
    forecast_latest = data_latest.forecast
    is_forecast_changed = model.process_forecast(data_previous, data_latest, max_price, available)
    current_price = float(data_latest.current_price)
    quantity = data_latest.available_shares - data_previous.available_shares
    stock_name = this_stock[0]
    current_quantity = data_latest.available_shares
    message = view.create_message(
        stock_name, timestamp_latest, current_price, quantity, current_quantity,
        forecast_previous, forecast_latest, False)
    print(message)
    if is_forecast_changed:
        view.broadcast(message)


if __name__ == '__main__':
    db = database.db
    timestamp_latest = model.get_timestamp_latest(db)  # global
    timestamp_stored = model.get_timestamp_stored()  # global
    if timestamp_latest == timestamp_stored:
        """Nothing to do"""
        sys.exit()
    # Update timestamp_stored
    model.put_timestamp_stored(timestamp_latest)
    timestamp_previous = model.get_timestamp_previous(db)  # global
    for stock in stocks.stocks:
        action = stock[-1]
        if action == "DROP":
            process_drop(stock)
        if action == "FORECAST":
            process_forecast(stock)
    db.close()