import sys

from asciimatics.event import KeyboardEvent
from asciimatics.exceptions import ResizeScreenError, StopApplication
from asciimatics.scene import Scene
from asciimatics.screen import Screen

from .ConfirmView import ConfirmView
from .ErrorView import ErrorView
from .Model import Model
from .ResultView import ResultView
from .TransactionView import TransactionView
from .WelcomeView import WelcomeView
from .members.AddUserView import AddUserView
from .members.GetUserView import GetUserView
from .members.GetUserResultView import GetUserResultView
from .members.RenewUserView import RenewUserView


def unhandled(event):
    if isinstance(event, KeyboardEvent):
        c = event.key_code
        # Stop on 'q' or 'Esc'
        if c in (113, 27):
            raise StopApplication("User terminated app")


# tuples of (name, view)
views = []


def screen_wrapper(screen, last_scene, model):
    global views
    # unload the old views
    for name, view in views:
        if hasattr(view, '_on_ceoframe_unload'):
            view._on_ceoframe_unload()
    width = min(screen.width, 90)
    height = min(screen.height, 24)
    views = [
        ('Welcome', WelcomeView(screen, width, height, model)),
        ('Confirm', ConfirmView(screen, width, height, model)),
        ('Transaction', TransactionView(screen, width, height, model)),
        ('Result', ResultView(screen, width, height, model)),
        ('Error', ErrorView(screen, width, height, model)),
        ('AddUser', AddUserView(screen, width, height, model)),
        ('RenewUser', RenewUserView(screen, width, height, model)),
        ('GetUser', GetUserView(screen, width, height, model)),
        ('GetUserResult', GetUserResultView(screen, width, height, model)),
    ]
    scenes = [
        Scene([view], -1, name=name) for name, view in views
    ]
    model.screen = screen
    model.views = [view for name, view in views]
    screen.play(
        scenes, stop_on_resize=True, start_scene=last_scene, allow_int=True,
        unhandled_input=unhandled)


def main():
    last_scene = None
    model = Model()
    while True:
        try:
            Screen.wrapper(screen_wrapper, arguments=[last_scene, model])
            sys.exit(0)
        except ResizeScreenError as e:
            last_scene = e.scene