import pathlib

test_file = pathlib.Path(__file__)
test_dir = test_file.parent
project_dir = test_dir.parent

import sys
sys.path.append(str(project_dir.absolute()))

import source as communication

class sample_message(communication.message):
    _type = 0x0010

    def __init__(self) -> None:
        super().__init__()

        self._add_field(communication.field("x_axis", int, 2))
        self._add_field(communication.field("y_axis", int, 2))
        self._add_field(communication.field("z_axis", int, 2))

def main():
    print("Starting test.")
    
    print("Sample message size: " + str(sample_message().size))
    print("Setting test message.")

    testing = sample_message()
    testing.set_x_axis(10)
    testing.set_y_axis(20)
    testing.set_z_axis(30)

    print("Encoding.")

    encoded = testing.encoder().code()

    print("Encoded lenght: " + str(len(encoded)))
    print("Encoded: " + str(encoded))
  
    print("Decoding.")

    decoded = communication.message_decoder(encoded).build(sample_message)

    print("Checking.")

    try:
        if decoded.get_x_axis() != 10:
            raise ValueError("X asis not validated.")

        if decoded.get_y_axis() != 20:
            raise ValueError("Y asis not validated.")

        if decoded.get_z_axis() != 30:
            raise ValueError("Z asis not validated.")

        print("Validated property.")

    except ValueError as error:
        print("Not validated, error: " + str(error))

    print("Checking decoder validation.")
    print("Adding errors to coded message.")

    too_long = encoded + bytes(10)
    with_bad_id = int(2).to_bytes(2) + encoded[2:]
    broken_message = encoded[0:5] + int(2).to_bytes(1) + encoded[6:]

    try:
        print("Testing too long message.")
        communication.message_decoder(too_long).build(sample_message)
    except Exception as error:
        print("Work, raised: " + str(error))

    try:
        print("Testing message with bad id.")
        communication.message_decoder(with_bad_id).build(sample_message)
    except Exception as error:
        print("Work, raised: " + str(error))

    try:
        print("Testing message with broken content")
        communication.message_decoder(broken_message).build(sample_message)
    except Exception as error:
        print("Work, raised: " + str(error))





if __name__ == "__main__":
    main()