from typing import Optional

import orjson
from django.conf import settings
from django.contrib.auth.views import redirect_to_login
from django.http import HttpRequest, HttpResponse, HttpResponseRedirect
from django.template.response import TemplateResponse

from zerver.context_processors import get_realm_from_request, latest_info_context
from zerver.decorator import add_google_analytics
from zerver.lib.github import InvalidPlatform, get_latest_github_release_download_link_for_platform
from zerver.models import Realm


@add_google_analytics
def apps_view(request: HttpRequest, platform: Optional[str] = None) -> HttpResponse:
    if settings.ZILENCER_ENABLED:
        return TemplateResponse(
            request,
            "zerver/apps.html",
        )
    return HttpResponseRedirect("https://zulip.com/apps/", status=301)


def app_download_link_redirect(request: HttpRequest, platform: str) -> HttpResponse:
    try:
        download_link = get_latest_github_release_download_link_for_platform(platform)
        return HttpResponseRedirect(download_link, status=302)
    except InvalidPlatform:
        return TemplateResponse(request, "404.html", status=404)


@add_google_analytics
def plans_view(request: HttpRequest) -> HttpResponse:
    realm = get_realm_from_request(request)
    realm_plan_type = 0
    free_trial_days = settings.FREE_TRIAL_DAYS
    sponsorship_pending = False

    if realm is not None:
        realm_plan_type = realm.plan_type
        if realm.plan_type == Realm.SELF_HOSTED and settings.PRODUCTION:
            return HttpResponseRedirect("https://zulip.com/plans")
        if not request.user.is_authenticated:
            return redirect_to_login(next="plans")
        if request.user.is_guest:
            return TemplateResponse(request, "404.html", status=404)
        if settings.CORPORATE_ENABLED:
            from corporate.models import get_customer_by_realm

            customer = get_customer_by_realm(realm)
            if customer is not None:
                sponsorship_pending = customer.sponsorship_pending

    return TemplateResponse(
        request,
        "zerver/plans.html",
        context={
            "realm_plan_type": realm_plan_type,
            "free_trial_days": free_trial_days,
            "sponsorship_pending": sponsorship_pending,
        },
    )


@add_google_analytics
def team_view(request: HttpRequest) -> HttpResponse:
    if not settings.ZILENCER_ENABLED:
        return HttpResponseRedirect("https://zulip.com/team/", status=301)

    try:
        with open(settings.CONTRIBUTOR_DATA_FILE_PATH, "rb") as f:
            data = orjson.loads(f.read())
    except FileNotFoundError:
        data = {"contributors": {}, "date": "Never ran."}

    return TemplateResponse(
        request,
        "zerver/team.html",
        context={
            "page_params": {
                "contributors": data["contributors"],
            },
            "date": data["date"],
        },
    )


def get_isolated_page(request: HttpRequest) -> bool:
    """Accept a GET param `?nav=no` to render an isolated, navless page."""
    return request.GET.get("nav") == "no"


@add_google_analytics
def landing_view(request: HttpRequest, template_name: str) -> HttpResponse:
    return TemplateResponse(request, template_name)


@add_google_analytics
def hello_view(request: HttpRequest) -> HttpResponse:
    return TemplateResponse(request, "zerver/hello.html", latest_info_context())


@add_google_analytics
def terms_view(request: HttpRequest) -> HttpResponse:
    return TemplateResponse(
        request,
        "zerver/terms.html",
        context={"isolated_page": get_isolated_page(request)},
    )


@add_google_analytics
def privacy_view(request: HttpRequest) -> HttpResponse:
    return TemplateResponse(
        request,
        "zerver/privacy.html",
        context={"isolated_page": get_isolated_page(request)},
    )