import threading
import time
from xtendr.xtendrbase import XtendRBase

class ExamplePlugin(XtendRBase):
    """Example plugin implementation.
    
    Example:
    >>> plugin = ExamplePlugin()
    >>> plugin.run("Hello!", 25)
    Passed arguments 2:
    Argument 0: Hello!
    Argument 1: 25
    ExamplePlugin is running!
    >>> plugin.stop()
    ExamplePlugin has stopped!
    """
    def run(self, *args, **kwargs):
        arglen = len(args)
        keylen = len(kwargs)
        if arglen > 0:
            print(f"Passed arguments {arglen}:")
            for idx, a in enumerate(args):
                print(f"Argument {idx}: {a}")
        if keylen > 0:
            print(f"Keyword arguments passed {keylen}")
            if not "test" in kwargs:
                raise ValueError("Didn't get expected 'test' keyword!")
            for kw in kwargs:
                print(f"Argument {kw}: {kwargs[kw]}")

        print("ExamplePlugin is running!")
    
    def stop(self):
        print("ExamplePlugin has stopped!")

    def pre_load(self, callback):
        time.sleep(5) # Indicate long running pre-load.
        callback()