#!/usr/bin/env python3

# OctoTray Linux Qt System Tray OctoPrint client
# depends on:
# - python-pyqt5
# - curl
# - xdg-open

import json
import subprocess
import sys
import os
import threading
import time
from PyQt5 import QtWidgets, QtGui, QtCore
from PyQt5.QtWidgets import QSystemTrayIcon, QAction, QMenu, QMessageBox
from PyQt5.QtGui import QIcon, QPixmap
from PyQt5.QtCore import QCoreApplication, QSettings

class OctoTray():
    name = "OctoTray"
    vendor = "xythobuz"
    version = "0.1"

    iconPath = "/usr/share/pixmaps/"
    iconName = "octotray_icon.png"

    # 0=host, 1=key
    # (2=method, 3=menu, 4=on-action, 5=off-action, 6=web-action)
    printers = [
        [ "PRINTER_HOST_HERE", "PRINTER_API_KEY_HERE" ]
    ]
    
    statesWithWarning = [
        "Printing", "Pausing", "Paused"
    ]

    def __init__(self):
        app = QtWidgets.QApplication(sys.argv)
        QCoreApplication.setApplicationName(self.name)

        if not QSystemTrayIcon.isSystemTrayAvailable():
            print("System Tray is not available on this platform!")
            sys.exit(0)

        self.menu = QMenu()

        for p in self.printers:
            method = self.getMethod(p[0], p[1])
            print("Printer " + p[0] + " has method " + method)
            p.append(method)
            if method == "unknown":
                continue

            menu = QMenu(self.getName(p[0], p[1]))
            p.append(menu)
            self.menu.addMenu(menu)

            action = QAction("Turn on")
            action.triggered.connect(lambda chk, x=p: self.printerOnAction(x))
            p.append(action)
            menu.addAction(action)

            action = QAction("Turn off")
            action.triggered.connect(lambda chk, x=p: self.printerOffAction(x))
            p.append(action)
            menu.addAction(action)

            action = QAction("Open Web UI")
            action.triggered.connect(lambda chk, x=p: self.printerWebAction(x))
            p.append(action)
            menu.addAction(action)

        self.quitAction = QAction("&Quit")
        self.quitAction.triggered.connect(self.exit)
        self.menu.addAction(self.quitAction)

        iconPathName = ""
        if os.path.isfile(self.iconName):
            iconPathName = self.iconName
        elif os.path.isfile(self.iconPath + self.iconName):
            iconPathName = self.iconPath + self.iconName
        else:
            print("no icon found")

        icon = QIcon()
        if iconPathName != "":
            pic = QPixmap(32, 32)
            pic.load(iconPathName)
            icon = QIcon(pic)

        trayIcon = QSystemTrayIcon(icon)
        trayIcon.setToolTip(self.name + " " + self.version)
        trayIcon.setContextMenu(self.menu)
        trayIcon.setVisible(True)

        sys.exit(app.exec_())

    def openBrowser(self, url):
        os.system("xdg-open http://" + url)

    def sendRequest(self, host, headers, path, content = None):
        cmdline = 'curl -s'
        for h in headers:
            cmdline += " -H \"" + h + "\""
        if content == None:
            cmdline += " -X GET"
        else:
            cmdline += " -X POST"
            cmdline += " -d '" + content + "'"
        cmdline += " http://" + host + "/api/" + path
        r = subprocess.run(cmdline, shell=True, capture_output=True, timeout=10, text=True)
        return r.stdout

    def sendPostRequest(self, host, key, path, content):
        headers = [ "Content-Type: application/json",
                   "X-Api-Key: " + key ]
        return self.sendRequest(host, headers, path, content)

    def sendGetRequest(self, host, key, path):
        headers = [ "X-Api-Key: " + key ]
        return self.sendRequest(host, headers, path)

    def getStatus(self, host, key):
        r = self.sendGetRequest(host, key, "job")
        try:
            rd = json.loads(r)
            if "state" in rd:
                return rd["state"]
        except json.JSONDecodeError:
            pass
        return "Unknown"

    def getName(self, host, key):
        r = self.sendGetRequest(host, key, "printerprofiles")
        try:
            rd = json.loads(r)
            if "profiles" in rd:
                p = next(iter(rd["profiles"]))
                if "name" in rd["profiles"][p]:
                    return rd["profiles"][p]["name"]
        except json.JSONDecodeError:
            pass
        return host

    def getMethod(self, host, key):
        r = self.sendGetRequest(host, key, "plugin/psucontrol")
        try:
            rd = json.loads(r)
            if "isPSUOn" in rd:
                return "psucontrol"
        except json.JSONDecodeError:
            pass

        r = self.sendGetRequest(host, key, "system/commands/custom")
        try:
            rd = json.loads(r)
            for c in rd:
                if "action" in c:
                    if (c["action"] == "all off") or (c["action"] == "all on"):
                        return "system"
        except json.JSONDecodeError:
            pass

        return "unknown"

    def setPSUControl(self, host, key, state):
        cmd = "turnPSUOff"
        if state:
            cmd = "turnPSUOn"
        return self.sendPostRequest(host, key, "plugin/psucontrol", '{ "command":"' + cmd + '" }')

    def setSystemCommand(self, host, key, state):
        cmd = "all%20off"
        if state:
            cmd = "all%20on"
        return self.sendPostRequest(host, key, "system/commands/custom/" + cmd, '')

    def setPrinter(self, host, key, method, state):
        if method == "psucontrol":
            return self.setPSUControl(host, key, state)
        elif method == "system":
            return self.setSystemCommand(host, key, state)
        else:
            return "error"

    def exit(self):
        QCoreApplication.quit()

    def printerOnAction(self, item):
        self.setPrinter(item[0], item[1], item[2], True)

    def printerOffAction(self, item):
        state = self.getStatus(item[0], item[1])
        if state in self.statesWithWarning:
            if self.showdialog() == True:
                self.setPrinter(item[0], item[1], item[2], False)
        else:
            self.setPrinter(item[0], item[1], item[2], False)

    def printerWebAction(self, item):
        self.openBrowser(item[0])

    def showdialog(self):
        msg = QMessageBox()
        msg.setIcon(QMessageBox.Warning)

        msg.setWindowTitle("OctoTray Warning")
        msg.setText("The printer seems to be running currently!")
        msg.setInformativeText("Do you really want to turn it off?")
        msg.setStandardButtons(QMessageBox.Yes | QMessageBox.No)

        retval = msg.exec_()
        if retval == QMessageBox.Yes:
            return True
        return False

if __name__ == "__main__":
    tray = OctoTray()