"use client";

import { SendHorizontal, SmilePlusIcon, ThumbsUp } from "lucide-react";
import {
  useCallback,
  useEffect,
  useRef,
  useState,
  type ChangeEvent,
} from "react";
import { Button } from "~/components/ui/button";
import {
  AutosizeTextarea,
  type AutosizeTextAreaRef,
} from "~/components/custom_ui/autoResizeTextArea";
import { api } from "~/utils/api";
import { ChatAttachments } from "~/components/chat/chat-attachments";
import { useMediaQuery } from "~/hooks/use-media-query";
import { useThrottledIsTypingMutation } from "~/hooks/chatHooks";
import type { Session } from "~/server/api/trpc";
import type { ChatsChatid } from "~/schemas/public/Chats";
import type { ChatUserInfo } from "~/server/services/chat.service";
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from "~/components/ui/popover";
import {
  EmojiPickerContent,
  EmojiPickerSearch,
  EmojiPicker,
} from "~/components/custom_ui/emoji-picker";
import { useTranslation } from "~/providers/I18nProvider";

type ChatBottombarProps = {
  chatId: ChatsChatid;
  userData: Session;
  chatUserData: ChatUserInfo;
};

export default function ChatBottombar({
  chatId,
  userData,
  chatUserData,
}: ChatBottombarProps) {
  const { locale } = useTranslation();
  const [message, setMessage] = useState("");
  const [isFocused, setIsFocused] = useState(false);
  const inputRef = useRef<AutosizeTextAreaRef>(null);

  const { mutate: addMutation } = api.messagesSSE.add.useMutation({});

  const handleThumbsUp = useCallback(() => {
    addMutation({
      chatId,
      message: "👍",
      sender: userData.id,
    });
    setMessage("");
  }, [chatId, addMutation, userData]);

  const handleSend = () => {
    if (message.length !== 0) {
      addMutation({
        chatId,
        message: message.trim(),
        sender: userData.id,
      });

      setMessage("");

      if (inputRef.current) {
        inputRef.current.textArea.focus();
        inputRef.current.textArea.style.height = "auto";
      }
    }
  };
  const isTypingMutation = useThrottledIsTypingMutation({
    chatId,
    username: userData.username,
  });

  useEffect(() => {
    // update isTyping state
    isTypingMutation(isFocused && message.trim().length > 0);
  }, [isFocused, message, isTypingMutation]);

  useEffect(() => {
    if (inputRef.current) {
      inputRef.current.textArea.focus();
    }
  }, []);
  const [openEmoji, setOpenEmoji] = useState(false);

  const isMobile = useMediaQuery("(min-width: 426px)");
  return (
    <div className="flex min-h-[74px] w-full items-center justify-between gap-2 p-2">
      <div className="flex">
        <ChatAttachments userData={userData} chatUserData={chatUserData} />
      </div>
      <div className="relative w-full">
        <AutosizeTextarea
          autoComplete="off"
          value={message}
          minHeight={56}
          ref={inputRef}
          onKeyDown={(e) => {
            if (e.key === "Enter") {
              e.preventDefault();
              if (e.shiftKey) {
                setMessage((prev) => `${prev}\n`);
              } else {
                handleSend();
              }
            }
          }}
          onFocus={() => setIsFocused(true)}
          onBlur={() => setIsFocused(false)}
          onChange={(e: ChangeEvent<HTMLTextAreaElement>) => {
            setMessage(e.target.value);
          }}
          name="message"
          placeholder="Aa"
          className="bg-background flex h-14 min-h-14 w-full resize-none items-center overflow-hidden rounded-xl border pr-8 ring-0 outline-hidden hover:border-neutral-400 focus:border-neutral-600 focus:ring-0 focus-visible:ring-0 focus-visible:ring-offset-0"
        />
        {isMobile && (
          <div className="absolute top-0 right-2 flex h-full items-center">
            <Popover open={openEmoji} onOpenChange={setOpenEmoji}>
              <PopoverTrigger asChild>
                <Button variant="ghost">
                  <SmilePlusIcon className="stroke-muted-foreground" />
                </Button>
              </PopoverTrigger>
              <PopoverContent align="end" className="w-fit p-0">
                <EmojiPicker
                  locale={locale as "it" | "en"}
                  className="h-84"
                  onEmojiSelect={({ emoji }) => {
                    setMessage(message + emoji);
                    // if (inputRef.current) {
                    //   inputRef.current.textArea.focus();
                    // }
                  }}
                >
                  <EmojiPickerSearch
                    placeholder={locale == "en" ? "Search..." : "Cerca..."}
                  />
                  <EmojiPickerContent />
                </EmojiPicker>
              </PopoverContent>
            </Popover>
          </div>
        )}
      </div>
      <Button
        aria-label="Send Message"
        variant="ghost"
        className="shrink-0"
        onClick={
          message.length != 0 ? () => handleSend() : () => handleThumbsUp()
        }
      >
        {message.length != 0 ? (
          <SendHorizontal size={20} className="text-muted-foreground" />
        ) : (
          <ThumbsUp size={20} className="text-muted-foreground" />
        )}
      </Button>
    </div>
  );
}