"""
haTerm - v0.1
(c) Chiara Wohlwend

haTerm is a Terminal Based hafas client, using the ivb endpoint.
Prompt_toolkit (https://github.com/prompt-toolkit/python-prompt-toolkit) will be used to render a terminal user interface (TUI).
The application will provide routing information and station departures/arrivals.
"""

from prompt_toolkit import Application
from prompt_toolkit.buffer import Buffer
from prompt_toolkit.layout.layout import Layout
from prompt_toolkit.layout.containers import Window, VSplit, HSplit
from prompt_toolkit.layout.controls import BufferControl
from prompt_toolkit.key_binding import KeyBindings
import threading
import time


keyB=KeyBindings()
inputBuffer=Buffer()
resultBuffer=Buffer()
stop_event=threading.Event()
app_state="MONITOR"

inputBuffer.text = "Haltestelle eingeben: "
inputBuffer.cursor_position = len(inputBuffer.text)

resultBuffer.text = "Ausgabe: "


root_container= HSplit(children=[
    VSplit(children=[
        Window(content=BufferControl(buffer=inputBuffer, focusable=True)),
        
        Window(width=1, char='│', style="fg:#9D1D75"),
        Window(content=BufferControl(buffer=resultBuffer, focusable=True)),
    ]),
    Window(height=1, char='-', style="bg:#9D1D75 fg:#FFFFFF"),
])

layout = Layout(root_container, focused_element=inputBuffer)

@keyB.add("enter")
def handle_enter(event):
    global app_state

    user_input = inputBuffer.text.replace("Haltestelle eingeben: ", "").strip()

    if user_input:
        app_state = "RESULTS"
        resultBuffer.text = f"Ergebnisse für: {user_input}\n\n"

        inputBuffer.text = "Haltestelle eingeben: "
        inputBuffer.cursor_position = len(inputBuffer.text)
    else:
        app_state = "MONITOR"
        resultBuffer.text = "MONITOR\n\n"

        inputBuffer.text = "Haltestelle eingeben: "
        inputBuffer.cursor_position = len(inputBuffer.text)

@keyB.add("c-q")
def exit_(event):
    stop_event.set()
    event.app.exit()

app = Application(layout=layout, full_screen=True, key_bindings=keyB)

try:
    app.run()
except KeyboardInterrupt:
    pass
finally:
    stop_event.set()