import json
import urllib

from django.conf import settings
from django.http import HttpResponse, JsonResponse
from django.shortcuts import render
from django.urls import reverse
from django.views import View
from django_tables2 import SingleTableMixin
from rest_framework.parsers import FormParser
from rest_framework.views import APIView

from core.lib.opensearch import query_results
from core.lib.threshold import (
    annotate_num_chans,
    annotate_num_users,
    get_chans,
    get_users,
)
from core.views.ui.tables import DrilldownTable


class DrilldownTableView(View, SingleTableMixin):
    table_class = DrilldownTable
    template_name = "ui/drilldown/table_results.html"
    paginate_by = 5

    def post(self, request):
        context = query_results(request)
        table = DrilldownTable(context["results"])
        context["table"] = table
        del context["results"]
        if "message" in context:
            return render(request, self.template_name, context)

        if self.request.htmx:
            template_name = "ui/drilldown/table_results.html"
        else:
            template_name = "ui/drilldown/table_results_partial.html"

        if context:
            return render(request, template_name, context)
        else:
            return HttpResponse("No results")


def parse_dates(dates):
    spl = dates.split(" - ")
    if all(spl):
        spl = [f"{x.replace(' ', 'T')}" for x in spl]
        if not len(spl) == 2:
            message = "Invalid dates"
            message_class = "danger"
            return {"message": message, "class": message_class}
        from_ts, to_ts = spl
        from_date, from_time = from_ts.split("T")
        to_date, to_time = to_ts.split("T")

        return {
            "from_date": from_date,
            "to_date": to_date,
            "from_time": from_time,
            "to_time": to_time,
        }


def create_tags(query):
    """
    Grab the tags out of the query and make a list
    we can add to the Bulma tags element when the page loads.
    """
    spl = query.split("AND")
    spl = [x.strip() for x in spl if ":" in x]
    spl = [x.replace('"', "") for x in spl]
    return spl


def drilldown_search(request):
    template_name = "ui/drilldown/results.html"
    if request.GET:
        query_params = request.GET.dict()
    elif request.POST:
        query_params = request.POST.dict()

    # Parse the dates
    if "dates" in query_params:
        dates = parse_dates(query_params["dates"])
        del query_params["dates"]
        if dates:
            if "message" in dates:
                return render(request, template_name, dates)
            query_params["from_date"] = dates["from_date"]
            query_params["to_date"] = dates["to_date"]
            query_params["from_time"] = dates["from_time"]
            query_params["to_time"] = dates["to_time"]

    if request.GET:
        context = query_results(request, query_params)
    elif request.POST:
        context = query_results(request, query_params)

    # Turn the query into tags for populating the taglist
    tags = create_tags(query_params["query"])
    context["tags"] = tags

    context["params"] = query_params
    if "message" in context:
        return render(request, template_name, context)

    context["data"] = json.dumps(
        [
            {
                "text": item.get("msg", None) or item.get("id"),
                "nick": item.get("nick", None),
                "value": item.get("sentiment", None) or None,
                "date": item.get("ts"),
            }
            for item in context["results"]
        ]
    )
    if context:
        response = render(request, template_name, context)
        if request.GET:
            return context
        elif request.POST:
            del query_params["csrfmiddlewaretoken"]
            url_params = urllib.parse.urlencode(query_params)
            response["HX-Push"] = reverse("home") + "?" + url_params
        return response
    else:
        return HttpResponse("No results")


class Drilldown(View):
    template_name = "ui/drilldown/drilldown.html"
    plan_name = "drilldown"

    def get(self, request):
        if request.user.is_anonymous:
            sizes = settings.OPENSEARCH_MAIN_SIZES_ANON
        else:
            sizes = settings.OPENSEARCH_MAIN_SIZES

        context = {}
        if request.GET:
            context = drilldown_search(request)
        context["sizes"] = sizes
        return render(request, self.template_name, context)

    def post(self, request):
        return drilldown_search(request)


class ThresholdInfoModal(APIView):
    parser_classes = [FormParser]
    plan_name = "drilldown"
    template_name = "modals/drilldown.html"

    def post(self, request):
        # if not request.user.has_plan(self.plan_name):
        #    return JsonResponse({"success": False})
        if "net" not in request.data:
            return JsonResponse({"success": False})
        if "nick" not in request.data:
            return JsonResponse({"success": False})
        if "channel" not in request.data:
            return JsonResponse({"success": False})
        net = request.data["net"]
        nick = request.data["nick"]
        channel = request.data["channel"]
        channels = get_chans(net, [nick])
        users = get_users(net, [channel])
        num_users = annotate_num_users(net, channels)
        num_chans = annotate_num_chans(net, users)
        if channels:
            inter_users = get_users(net, channels)
        else:
            inter_users = []
        if users:
            inter_chans = get_chans(net, users)
        else:
            inter_chans = []
        context = {
            "net": net,
            "nick": nick,
            "channel": channel,
            "chans": channels,
            "users": users,
            "inter_chans": inter_chans,
            "inter_users": inter_users,
            "num_users": num_users,
            "num_chans": num_chans,
        }
        return render(request, self.template_name, context)