import { Tooltip } from "@mui/joy";
import dayjs from "dayjs";
import { countBy } from "lodash-es";
import { CheckCircleIcon, ChevronRightIcon, ChevronLeftIcon, Code2Icon, LinkIcon, ListTodoIcon, BookmarkIcon } from "lucide-react";
import { observer } from "mobx-react-lite";
import { useState } from "react";
import DatePicker from "react-datepicker";
import { matchPath, useLocation } from "react-router-dom";
import useAsyncEffect from "@/hooks/useAsyncEffect";
import useCurrentUser from "@/hooks/useCurrentUser";
import i18n from "@/i18n";
import { Routes } from "@/router";
import { useMemoFilterStore } from "@/store/v1";
import { userStore } from "@/store/v2";
import { UserStats_MemoTypeStats } from "@/types/proto/api/v1/user_service";
import { cn } from "@/utils";
import { useTranslate } from "@/utils/i18n";
import ActivityCalendar from "./ActivityCalendar";
import "react-datepicker/dist/react-datepicker.css";

const StatisticsView = observer(() => {
  const t = useTranslate();
  const location = useLocation();
  const memoFilterStore = useMemoFilterStore();
  const currentUser = useCurrentUser();
  const [memoTypeStats, setMemoTypeStats] = useState<UserStats_MemoTypeStats>(UserStats_MemoTypeStats.fromPartial({}));
  const [activityStats, setActivityStats] = useState<Record<string, number>>({});
  const [selectedDate] = useState(new Date());
  const [visibleMonthString, setVisibleMonthString] = useState(dayjs(selectedDate.toDateString()).format("YYYY-MM"));

  useAsyncEffect(async () => {
    const memoTypeStats = UserStats_MemoTypeStats.fromPartial({});
    const displayTimeList: Date[] = [];
    for (const stats of Object.values(userStore.state.userStatsByName)) {
      displayTimeList.push(...stats.memoDisplayTimestamps);
      if (stats.memoTypeStats) {
        memoTypeStats.codeCount += stats.memoTypeStats.codeCount;
        memoTypeStats.linkCount += stats.memoTypeStats.linkCount;
        memoTypeStats.todoCount += stats.memoTypeStats.todoCount;
        memoTypeStats.undoCount += stats.memoTypeStats.undoCount;
      }
    }
    setMemoTypeStats(memoTypeStats);
    setActivityStats(countBy(displayTimeList.map((date) => dayjs(date).format("YYYY-MM-DD"))));
  }, [userStore.state.userStatsByName]);

  const onCalendarClick = (date: string) => {
    memoFilterStore.removeFilter((f) => f.factor === "displayTime");
    memoFilterStore.addFilter({ factor: "displayTime", value: date });
  };

  const currentMonth = dayjs(visibleMonthString).toDate();

  return (
    <div className="group w-full mt-3 space-y-1 text-gray-500 dark:text-gray-400">
      <div className="w-full mb-1 flex flex-row justify-between items-center gap-1">
        <div className="relative text-sm font-medium inline-flex flex-row items-center w-auto dark:text-gray-400">
          <DatePicker
            selected={currentMonth}
            onChange={(date) => {
              if (date) {
                setVisibleMonthString(dayjs(date).format("YYYY-MM"));
              }
            }}
            dateFormat="MMMM yyyy"
            showMonthYearPicker
            showFullMonthYearPicker
            customInput={
              <span className="cursor-pointer text-base hover:text-gray-600 dark:hover:text-gray-300">
                {dayjs(visibleMonthString).toDate().toLocaleString(i18n.language, { year: "numeric", month: "long" })}
              </span>
            }
            popperPlacement="bottom-start"
            calendarClassName="!bg-white !border-gray-200 !font-normal !shadow-lg"
          />
        </div>
        <div className="flex justify-end items-center shrink-0 gap-1">
          <span
            className="cursor-pointer hover:opacity-80"
            onClick={() => setVisibleMonthString(dayjs(visibleMonthString).subtract(1, "month").format("YYYY-MM"))}
          >
            <ChevronLeftIcon className="w-5 h-auto shrink-0 opacity-40" />
          </span>
          <span
            className="cursor-pointer hover:opacity-80"
            onClick={() => setVisibleMonthString(dayjs(visibleMonthString).add(1, "month").format("YYYY-MM"))}
          >
            <ChevronRightIcon className="w-5 h-auto shrink-0 opacity-40" />
          </span>
        </div>
      </div>
      <div className="w-full">
        <ActivityCalendar
          month={visibleMonthString}
          selectedDate={selectedDate.toDateString()}
          data={activityStats}
          onClick={onCalendarClick}
        />
      </div>
      <div className="pt-1 w-full flex flex-row justify-start items-center gap-1 flex-wrap">
        {matchPath(Routes.ROOT, location.pathname) &&
          currentUser &&
          userStore.state.currentUserStats &&
          userStore.state.currentUserStats.pinnedMemos.length > 0 && (
            <div
              className={cn("w-auto border dark:border-zinc-800 pl-1.5 pr-2 py-0.5 rounded-md flex justify-between items-center")}
              onClick={() => memoFilterStore.addFilter({ factor: "pinned", value: "" })}
            >
              <div className="w-auto flex justify-start items-center mr-1">
                <BookmarkIcon className="w-4 h-auto mr-1" />
                <span className="block text-sm">Pinned</span>
              </div>
              <span className="text-sm truncate">{userStore.state.currentUserStats.pinnedMemos.length}</span>
            </div>
          )}
        <div
          className={cn("w-auto border dark:border-zinc-800 pl-1.5 pr-2 py-0.5 rounded-md flex justify-between items-center")}
          onClick={() => memoFilterStore.addFilter({ factor: "property.hasLink", value: "" })}
        >
          <div className="w-auto flex justify-start items-center mr-1">
            <LinkIcon className="w-4 h-auto mr-1" />
            <span className="block text-sm">{t("memo.links")}</span>
          </div>
          <span className="text-sm truncate">{memoTypeStats.linkCount}</span>
        </div>
        <div
          className={cn("w-auto border dark:border-zinc-800 pl-1.5 pr-2 py-0.5 rounded-md flex justify-between items-center")}
          onClick={() => memoFilterStore.addFilter({ factor: "property.hasTaskList", value: "" })}
        >
          <div className="w-auto flex justify-start items-center mr-1">
            {memoTypeStats.undoCount > 0 ? <ListTodoIcon className="w-4 h-auto mr-1" /> : <CheckCircleIcon className="w-4 h-auto mr-1" />}
            <span className="block text-sm">{t("memo.to-do")}</span>
          </div>
          {memoTypeStats.undoCount > 0 ? (
            <Tooltip title={"Done / Total"} placement="top" arrow>
              <div className="text-sm flex flex-row items-start justify-center">
                <span className="truncate">{memoTypeStats.todoCount - memoTypeStats.undoCount}</span>
                <span className="font-mono opacity-50">/</span>
                <span className="truncate">{memoTypeStats.todoCount}</span>
              </div>
            </Tooltip>
          ) : (
            <span className="text-sm truncate">{memoTypeStats.todoCount}</span>
          )}
        </div>
        <div
          className={cn("w-auto border dark:border-zinc-800 pl-1.5 pr-2 py-0.5 rounded-md flex justify-between items-center")}
          onClick={() => memoFilterStore.addFilter({ factor: "property.hasCode", value: "" })}
        >
          <div className="w-auto flex justify-start items-center mr-1">
            <Code2Icon className="w-4 h-auto mr-1" />
            <span className="block text-sm">{t("memo.code")}</span>
          </div>
          <span className="text-sm truncate">{memoTypeStats.codeCount}</span>
        </div>
      </div>
    </div>
  );
});

export default StatisticsView;
