import subprocess
import sys

from PyQt5.QtWidgets import QMessageBox

from .component import Component


class Os_Label_Printer(Component):
    def __init__(self, config=None, name=None):
        super().__init__(config=config, name=name, threaded=False)
        if "--sim-os-label-printer" in sys.argv:
            self.simulate = True

    def config_changed(self):
        self.platform = self.config["label_printer"]["platform"]
        # for windows:
        # cmd
        # wmic printer list brief
        # powershell
        # Get-Printer
        # for cups (linux, osx)
        # lpstat -p -d
        self.printer = self.config["label_printer"]["printer"]

    def print_label(self, template, archived):
        # LOAD LABEL TEMPLATE
        with open(f"config/label_templates/{template}.prn") as f:
            label = f.read()
        # LABEL PRINT
        label = label.replace("$PH1", archived.barcode).replace("$PH2", archived.barcode)
        label_file = "a"
        if self.platform == "windows":
            cmd = f'print /d:"{self.printer}" "{label_file}"'
        elif self.platform == "cups":
            cmd = f'lp -d "{self.printer}" "{label_file}"'
        else:
            raise NotImplementedError(f"platform {self.platform!r} is not supported")
        if not self.simulate:
            p = subprocess.run(cmd, stderr=subprocess.STDOUT, stdout=subprocess.PIPE, shell=True)  # unsafe
            if p.returncode != 0:
                self.log.exception(f"failed to print: returncode: {p.returncode}\noutput:\n{p.stdout}")
                QMessageBox.critical(
                    None,
                    "Errore Stampante",
                    f"Non e stato possibile stampare l'etichetta.\n\nErrore:\nreturncode: {p.returncode}\noutput:\n{p.stdout}"
                )
                return False
        return True