from datetime import datetime
from time import sleep
from sys import exit
from PyQt5.QtCore import QThread, QTimer
from PyQt5.QtWidgets import QMessageBox
from threads.Graph import Graph
from config import Config
from util.Timer import Timer

class MainThread(QThread):
    def __init__(self, ui, parent=None):
        super(MainThread, self).__init__(parent)
        self.ui = ui
        self.data = []
        self.graph = Graph(self.ui.mainGraph, 100, self._log)
        self.upTimer = Timer()
        self.downTimer = Timer(delay=10)
        try:
            self.config = Config()
        except FileNotFoundError:
            self._fatal("Arquivo de configuração não encontrado!")

    def run(self):
        self.ui.samplingCBox.currentIndexChanged.connect(self._updateSamplingRate)
        self.ui.startTimerButton.pressed.connect(self._startTimer)
        self.ui.stopTimerButton.pressed.connect(self._stopTimer)
        self.ui.startRegTimerButton.pressed.connect(self._startTimer)
        self.ui.stopRegTimerButton.pressed.connect(self._stopTimer)
        self.graph.start()

        while True:
            self._updateTimers()
            sleep(1/30.0) # Updates at 30FPS
        
    def _updateSamplingRate(self):
        MAP = [100, 200, 500, 1000, 1500, 2000, 2500, 5000, 10000]
        self._log("[DEBUG]", self.ui.samplingCBox.currentText())
        self.graph.setInterval(MAP[self.ui.samplingCBox.currentIndex()])
    
    def _fatal(self, msg):
        error = QMessageBox()
        error.setText(msg)
        error.setWindowTitle("Erro")
        error.exec()
        exit(-1)
    
    def _log(self, tag, msg):
        self.ui.consoleView.setText("{} {}\n{}".format(tag, msg, self.ui.consoleView.text()))

    def _updateTimers(self):
        if self.upTimer.active:
            self.upTimer.update()
        if self.downTimer.active:
            self.downTimer.update()
        self.ui.currentTimeLabel.setText(datetime.now().strftime("%H:%M:%S"))
        self.ui.timerLabel.setText(self.upTimer.getTimeString())
        self.ui.regTimerLabel.setText(self.downTimer.getTimeString())
        
    def _startTimer(self):
        btn = self.sender()
        timer = self.upTimer if btn == self.ui.startTimerButton else self.downTimer
        if btn.text() == "Iniciar":
            self.ui.startTimeLabel.setText(datetime.now().strftime("%H:%M:%S"))
            btn.setText("Parar")
            timer.start()
        else:
            btn.setText("Iniciar")
            timer.stop()
        self.graph.addMarker(datetime.now().strftime("%H:%M:%S"))
    
    def _stopTimer(self):
        if self.sender == self.ui.stopTimerButton:
            self.upTimer.stop()
            self.upTimer.clear()
        else:
            self.downTimer.stop()
            self.downTimer.clear()