"use client";

import dayjs from "@calcom/dayjs";
import {
  RECORDING_DEFAULT_ICON,
  TRANSCRIPTION_STOPPED_ICON,
  WEBAPP_URL,
  WEBSITE_URL,
} from "@calcom/lib/constants";
import { formatToLocalizedDate, formatToLocalizedTime } from "@calcom/lib/dayjs";
import { emailRegex } from "@calcom/lib/emailSchema";
import { useLocale } from "@calcom/lib/hooks/useLocale";
import { markdownToSafeHTML } from "@calcom/lib/markdownToSafeHTML";
import type { inferSSRProps } from "@calcom/types/inferSSRProps";
import classNames from "@calcom/ui/classNames";
import { Badge } from "@calcom/ui/components/badge";
import { Button } from "@calcom/ui/components/button";
import { Dialog, DialogContent } from "@calcom/ui/components/dialog";
import { Input } from "@calcom/ui/components/form";
import { CalendarDaysIcon, ChevronRightIcon } from "@coss/ui/icons";
import type { DailyCall } from "@daily-co/daily-js";
import DailyIframe from "@daily-co/daily-js";
import { DailyProvider, useDailyEvent } from "@daily-co/daily-react";
import type { getServerSideProps } from "@lib/video/[uid]/getServerSideProps";
import { useCallback, useEffect, useRef, useState } from "react";
import { CalVideoPremiumFeatures } from "../cal-video-premium-features";

export type PageProps = inferSSRProps<typeof getServerSideProps>;

export default function JoinCall(props: PageProps) {
  const { t } = useLocale();
  const {
    meetingUrl,
    meetingPassword,
    booking,
    hasTeamPlan,
    calVideoLogo,
    loggedInUserName,
    overrideName,
    showRecordingButton,
    enableAutomaticTranscription,
    enableAutomaticRecordingForOrganizer,
    showTranscriptionButton,
    rediectAttendeeToOnExit,
    requireEmailForGuests,
    isLoggedInUserPartOfMeeting,
  } = props;
  const [daily, setDaily] = useState<DailyCall | null>(null);
  const [guestCredentials, setGuestCredentials] = useState<{
    meetingPassword: string;
    meetingUrl: string;
    userName: string;
  } | null>(null);

  const userNameForCall = overrideName ?? loggedInUserName ?? undefined;
  const hideLoginModal =
    !!userNameForCall && (requireEmailForGuests ? !!loggedInUserName && isLoggedInUserPartOfMeeting : true);
  const [isCallFrameReady, setIsCallFrameReady] = useState<boolean>(false);

  const activeMeetingPassword = guestCredentials?.meetingPassword ?? meetingPassword;
  const activeMeetingUrl = guestCredentials?.meetingUrl ?? meetingUrl;
  const activeUserName = guestCredentials?.userName ?? userNameForCall;

  const createCallFrame = useCallback(
    (userName?: string, password?: string, url?: string) => {
      let callFrame: DailyCall | undefined;

      try {
        callFrame = DailyIframe.createFrame({
          theme: {
            colors: {
              accent: "#292929",
              accentText: "#FFF",
              background: "#111111",
              backgroundAccent: "#111111",
              baseText: "#FFF",
              border: "#292929",
              mainAreaBg: "#111111",
              mainAreaBgAccent: "#1A1A1A",
              mainAreaText: "#FFF",
              supportiveText: "#FFF",
            },
          },
          showLeaveButton: true,
          iframeStyle: {
            position: "fixed",
            width: "100%",
            height: "100%",
          },
          url: url ?? meetingUrl,
          userName: userName,
          ...(typeof (password ?? meetingPassword) === "string" && { token: password ?? meetingPassword }),
          ...(hasTeamPlan && {
            customTrayButtons: {
              ...(showRecordingButton
                ? {
                    recording: {
                      label: t("record"),
                      tooltip: t("start_or_stop_recording"),
                      iconPath: RECORDING_DEFAULT_ICON,
                      iconPathDarkMode: RECORDING_DEFAULT_ICON,
                    },
                  }
                : {}),
              ...(showTranscriptionButton
                ? {
                    transcription: {
                      label: t("transcribe"),
                      tooltip: t("transcription_powered_by_ai"),
                      iconPath: TRANSCRIPTION_STOPPED_ICON,
                      iconPathDarkMode: TRANSCRIPTION_STOPPED_ICON,
                    },
                  }
                : {}),
            },
          }),
        });

        if (userName) {
          callFrame.setUserName(userName);
        }

        return callFrame;
      } catch (_err) {
        return DailyIframe.getCallInstance();
      }
    },
    [meetingUrl, meetingPassword, hasTeamPlan, showRecordingButton, showTranscriptionButton, t]
  );
  useEffect(() => {
    if (!hideLoginModal && !guestCredentials) {
      return;
    }

    let callFrame: DailyCall | null = null;

    try {
      callFrame = createCallFrame(activeUserName, activeMeetingPassword, activeMeetingUrl) ?? null;
      setDaily(callFrame);
      setIsCallFrameReady(true);

      callFrame?.join();
    } catch (error) {
      console.error("Failed to create or join call:", error);
    }

    return () => {
      if (callFrame) {
        try {
          callFrame.destroy();
        } catch (error) {
          console.error("Error destroying call frame:", error);
        }
      }
      setDaily(null);
      setIsCallFrameReady(false);
    };
  }, [
    hideLoginModal,
    activeUserName,
    activeMeetingPassword,
    activeMeetingUrl,
    createCallFrame,
    guestCredentials,
  ]);

  return (
    <DailyProvider callObject={daily}>
      {isCallFrameReady && (
        <div
          className="mx-auto hidden sm:block"
          style={{ zIndex: 2, left: "30%", position: "absolute", bottom: 100, width: "auto" }}>
          <CalVideoPremiumFeatures
            showRecordingButton={showRecordingButton}
            enableAutomaticRecordingForOrganizer={enableAutomaticRecordingForOrganizer}
            enableAutomaticTranscription={enableAutomaticTranscription}
            showTranscriptionButton={showTranscriptionButton}
          />
        </div>
      )}
      <div style={{ zIndex: 2, position: "relative" }}>
        {calVideoLogo ? (
          <img
            className="fixed z-10 hidden aspect-square h-16 min-h-16 w-16 min-w-16 rounded-full sm:inline-block"
            src={calVideoLogo}
            alt="My Org Logo"
            style={{
              top: 32,
              left: 32,
            }}
          />
        ) : (
          <img
            className="fixed z-10 hidden h-5 sm:inline-block"
            src={`${WEBSITE_URL}/cal-logo-word-dark.svg`}
            alt="Logo"
            style={{
              top: 47,
              left: 20,
            }}
          />
        )}
      </div>
      {!hideLoginModal && (
        <LogInOverlay
          isOpen={!hideLoginModal}
          bookingUid={booking.uid}
          bookingTitle={booking.title}
          hostName={booking.user?.name ?? ""}
          loggedInUserName={loggedInUserName ?? undefined}
          overrideName={overrideName}
          requireEmailForGuests={requireEmailForGuests}
          onGuestCredentialsReceived={setGuestCredentials}
          meetingPassword={meetingPassword}
          meetingUrl={meetingUrl}
        />
      )}

      <VideoMeetingInfo booking={booking} rediectAttendeeToOnExit={rediectAttendeeToOnExit} />
    </DailyProvider>
  );
}

interface ProgressBarProps {
  startTime: string;
  endTime: string;
}

function ProgressBar(props: ProgressBarProps) {
  const { t } = useLocale();
  const { startTime, endTime } = props;
  const currentTime = dayjs().second(0).millisecond(0);
  const startingTime = dayjs(startTime).second(0).millisecond(0);
  const isPast = currentTime.isAfter(startingTime);
  const currentDifference = dayjs().diff(startingTime, "minutes");
  const startDuration = dayjs(endTime).diff(startingTime, "minutes");
  const [duration, setDuration] = useState(() => {
    if (currentDifference >= 0 && isPast) {
      return startDuration - currentDifference;
    } else {
      return startDuration;
    }
  });

  const timeoutRef = useRef<NodeJS.Timeout | null>(null);
  const intervalRef = useRef<NodeJS.Timeout | null>(null);

  useEffect(() => {
    const now = dayjs();
    const remainingMilliseconds = (60 - now.get("seconds")) * 1000 - now.get("milliseconds");

    timeoutRef.current = setTimeout(() => {
      const past = dayjs().isAfter(startingTime);

      if (past) {
        setDuration((prev) => prev - 1);
      }

      intervalRef.current = setInterval(() => {
        if (dayjs().isAfter(startingTime)) {
          setDuration((prev) => prev - 1);
        }
      }, 60000);
    }, remainingMilliseconds);

    return () => {
      if (timeoutRef.current) {
        clearTimeout(timeoutRef.current);
        timeoutRef.current = null;
      }
      if (intervalRef.current) {
        clearInterval(intervalRef.current);
        intervalRef.current = null;
      }
    };
  }, [startingTime]);

  const prev = startDuration - duration;
  const percentage = prev * (100 / startDuration);
  return (
    <div>
      <p>
        {duration} {t("minutes")}
      </p>
      <div className="relative h-2 max-w-xl overflow-hidden rounded-full">
        <div className="absolute h-full w-full bg-gray-500/10" />
        <div className={classNames("relative h-full bg-green-500")} style={{ width: `${percentage}%` }} />
      </div>
    </div>
  );
}

interface LogInOverlayProps {
  isOpen: boolean;
  bookingUid: string;
  bookingTitle: string;
  hostName: string;
  loggedInUserName?: string;
  overrideName?: string;
  requireEmailForGuests?: boolean;
  onGuestCredentialsReceived: (credentials: {
    meetingPassword: string;
    meetingUrl: string;
    userName: string;
  }) => void;
  meetingPassword?: string;
  meetingUrl: string;
}

export function LogInOverlay(props: LogInOverlayProps) {
  const { t } = useLocale();
  const {
    bookingUid,
    bookingTitle,
    hostName,
    isOpen: _open,
    loggedInUserName,
    overrideName,
    requireEmailForGuests = false,
    onGuestCredentialsReceived,
    meetingPassword,
    meetingUrl,
  } = props;

  const [isOpen, setIsOpen] = useState(_open);
  const [userName, setUserName] = useState(overrideName ?? loggedInUserName ?? "");
  const [userEmail, setUserEmail] = useState("");
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const handleContinueAsGuest = useCallback(async () => {
    const trimmedName = userName.trim();
    const trimmedEmail = userEmail.trim();

    if (!trimmedName) {
      setError(t("please_enter_name"));
      return;
    }

    if (requireEmailForGuests) {
      if (!trimmedEmail) {
        setError(t("please_enter_name_and_email"));
        return;
      }

      if (!emailRegex.test(trimmedEmail)) {
        setError(t("invalid_email_address"));
        return;
      }
    }

    setIsLoading(true);
    setError(null);

    try {
      // Only create guest session if email is required and provided
      if (requireEmailForGuests && trimmedEmail) {
        const csrfResponse = await fetch("/api/csrf", { cache: "no-store" });
        const { csrfToken } = await csrfResponse.json();

        const response = await fetch("/api/video/guest-session", {
          method: "POST",
          headers: { "Content-Type": "application/json" },
          body: JSON.stringify({
            bookingUid,
            email: trimmedEmail,
            name: trimmedName,
            csrfToken,
          }),
        });

        if (!response.ok) {
          const errorData = await response.json();
          const errorKey = errorData.error;
          throw new Error(errorKey || "Failed to create guest session");
        }

        const { meetingPassword, meetingUrl } = await response.json();

        onGuestCredentialsReceived({
          meetingPassword,
          meetingUrl,
          userName: trimmedName,
        });

        setIsOpen(false);
      } else {
        // If email not required, use existing credentials from SSR props
        if (!meetingPassword) {
          throw new Error("Meeting password not available");
        }

        onGuestCredentialsReceived({
          meetingPassword,
          meetingUrl,
          userName: trimmedName,
        });

        setIsOpen(false);
      }
    } catch (error) {
      const errorKey = error instanceof Error ? error.message : "failed_to_join_call";
      const errorMessage = t(errorKey) || errorKey;
      setError(errorMessage);
      setIsLoading(false);
    }
  }, [
    userName,
    userEmail,
    bookingUid,
    requireEmailForGuests,
    t,
    onGuestCredentialsReceived,
    meetingPassword,
    meetingUrl,
  ]);

  const handleKeyDown = useCallback(
    (e: React.KeyboardEvent<HTMLInputElement>) => {
      if (e.key === "Enter" && userName.trim() && !isLoading) {
        handleContinueAsGuest();
      }
    },
    [userName, isLoading, handleContinueAsGuest]
  );

  const handleUserNameChange = useCallback(
    (e: React.ChangeEvent<HTMLInputElement>) => {
      setUserName(e.target.value);
      if (error) {
        setError(null);
      }
    },
    [error]
  );

  const handleEmailChange = useCallback(
    (e: React.ChangeEvent<HTMLInputElement>) => {
      setUserEmail(e.target.value);
      if (error) {
        setError(null);
      }
    },
    [error]
  );

  return (
    <Dialog open={isOpen} onOpenChange={setIsOpen}>
      <DialogContent className="p-6 sm:max-w-md" onInteractOutside={(e) => e.preventDefault()}>
        <div className="flex flex-col gap-5">
          <div className="flex items-center justify-between rounded-lg border border-subtle p-3">
            <div className="flex items-center gap-3">
              <div className="flex h-10 w-10 items-center justify-center rounded-md bg-subtle">
                <CalendarDaysIcon className="h-5 w-5 text-default" />
              </div>
              <div>
                <p className="font-semibold text-emphasis text-sm">{bookingTitle}</p>
                <p className="text-subtle text-xs">{t("hosted_by", { name: hostName })}</p>
              </div>
            </div>
            <Badge variant="success" withDot>
              {t("ready")}
            </Badge>
          </div>

          <div>
            <h3 className="font-bold text-emphasis text-lg">{t("ready_to_join")}</h3>
            <p className="text-sm text-subtle">{t("enter_name_to_join_call")}</p>
          </div>

          <div className="flex flex-col gap-3">
            <Input
              type="text"
              placeholder={t("your_name")}
              className="w-full"
              value={userName}
              onChange={handleUserNameChange}
              onKeyDown={handleKeyDown}
              disabled={isLoading}
              autoFocus
            />

            {requireEmailForGuests && (
              <Input
                type="email"
                placeholder={t("email_address")}
                className="w-full"
                value={userEmail}
                onChange={handleEmailChange}
                onKeyDown={handleKeyDown}
                disabled={isLoading}
              />
            )}

            <Button
              color="primary"
              className="w-full justify-center"
              onClick={handleContinueAsGuest}
              loading={isLoading}>
              {t("join_call_as_guest")}
            </Button>
          </div>

          {error && (
            <div className="rounded-md bg-error p-3">
              <p className="font-medium text-error text-sm">{error}</p>
            </div>
          )}

          <p className="text-center text-sm text-subtle">
            <a
              href={`${WEBAPP_URL}/auth/login?callbackUrl=${WEBAPP_URL}/video/${bookingUid}`}
              className="text-emphasis underline">
              {t("sign_in")}
            </a>{" "}
            {t("to_track_no_shows")}
          </p>
        </div>
      </DialogContent>
    </Dialog>
  );
}

interface VideoMeetingInfo {
  booking: PageProps["booking"];
  rediectAttendeeToOnExit?: string | null;
}

export function VideoMeetingInfo(props: VideoMeetingInfo) {
  const [open, setOpen] = useState(false);
  const { booking, rediectAttendeeToOnExit } = props;
  const { t } = useLocale();

  const endTime = new Date(booking.endTime);
  const startTime = new Date(booking.startTime);
  const timeZone = booking.user?.timeZone;

  useDailyEvent("left-meeting", () => {
    if (rediectAttendeeToOnExit) {
      window.location.href = rediectAttendeeToOnExit;
    }
  });

  return (
    <aside
      className={classNames(
        "no-scrollbar fixed top-0 left-0 z-30 flex h-full w-64 transform justify-between overflow-x-hidden overflow-y-scroll transition-all duration-300 ease-in-out",
        open ? "translate-x-0" : "-translate-x-[232px]"
      )}>
      <main className="prose-sm prose scroll-bar scrollbar-track-w-20 overflow-x-hidden! w-full max-w-64 overflow-scroll border-subtle border-r bg-default p-4 prose-h3:font-cal prose-a:text-emphasis prose-h3:text-emphasis text-emphasis shadow-sm backdrop-blur-lg">
        <h3>{t("what")}:</h3>
        <p>{booking.title}</p>
        <h3>{t("invitee_timezone")}:</h3>
        <p>{timeZone}</p>
        <h3>{t("when")}:</h3>
        <p suppressHydrationWarning={true}>
          {formatToLocalizedDate(startTime)} <br />
          {formatToLocalizedTime({ date: startTime, timeZone })}
        </p>
        <h3>{t("time_left")}</h3>
        <ProgressBar key={String(open)} endTime={endTime.toISOString()} startTime={startTime.toISOString()} />

        <h3>{t("who")}:</h3>
        <p>
          {booking?.user?.name} - {t("organizer")}
          {!booking?.eventType?.hideOrganizerEmail && (
            <>
              : <a href={`mailto:${booking?.user?.email}`}>{booking?.user?.email}</a>
            </>
          )}
        </p>

        {booking.attendees.length
          ? booking.attendees.map((attendee) => (
              <p key={attendee.id}>
                {attendee.name} – <a href={`mailto:${attendee.email}`}>{attendee.email}</a>
              </p>
            ))
          : null}

        {booking.description && (
          <>
            <h3>{t("description")}:</h3>

            {/* biome-ignore lint/security/noDangerouslySetInnerHtml: Content is sanitized via markdownToSafeHTML */}
            <div
              className="prose-sm prose prose-invert"
              dangerouslySetInnerHTML={{ __html: markdownToSafeHTML(booking.description) }}
            />
          </>
        )}
      </main>
      <div className="flex items-center justify-center">
        <button
          aria-label={`${open ? "close" : "open"} booking description sidebar`}
          className="h-20 w-6 rounded-r-md border border-gray-300/20 border-l-0 bg-black/60 text-white shadow-sm backdrop-blur-lg"
          onClick={() => setOpen(!open)}>
          <ChevronRightIcon
            aria-hidden
            className={classNames(open && "rotate-180", "w-5 transition-all duration-300 ease-in-out")}
          />
        </button>
      </div>
    </aside>
  );
}