from django.http import HttpRequest, HttpResponse
from django.shortcuts import render

from engine import encode, decode, format_location, parse_location

def hello_world(request: HttpRequest) -> HttpResponse:
    return render(request, 'websiteapp/hello_world.html', {
        "content": "hi!",
    })

def landing_page(request: HttpRequest) -> HttpResponse:
    return render(request, 'websiteapp/landing_page.html', {})

def encode_view(request: HttpRequest) -> HttpResponse:
    return render(request, 'websiteapp/encode.html', {})

def encode_result_view(request: HttpRequest) -> HttpResponse:
    lat, lon = request.GET.get('lat', None), request.GET.get('lon', None)

    if lat is None or lon is None:
        # TODO: do some nice error display
        return render(request, 'websiteapp/encode_result.html', {"result": "error"})

    result = encode((float(lat), float(lon)))
    result_str = format_location(result)

    return render(request, 'websiteapp/encode_result.html', {"result": result_str})

def decode_view(request: HttpRequest) -> HttpResponse:
    return render(request, 'websiteapp/decode.html', {})

def decode_result_view(request: HttpRequest) -> HttpResponse:
    loc_str = request.GET.get('loc', None)
    if loc_str is None:
        # TODO: do some nice error display
        result = "error"
        lat, lon = 0, 0

    else:
        try:
            loc = parse_location(loc_str)
            (lat, lon) = decode(loc)
            result = f"{lat},{lon}"
        except ValueError:
            result = "ERROR - invalid greggordinate!"
            lat, lon = 0, 0

    return render(request, 'websiteapp/decode_result.html', {"result": result, "lat": lat, "lon": lon})