import { Button } from "@mui/material";
import { useNavigate, useNavigationType } from "react-router";
import { MediaViewer } from "@widgets";
import { useMapData } from "./MapDataContext";
import { observer } from "mobx-react-lite";
import { useEffect, useState } from "react";
import { authInstance, isMediaIdEmpty } from "@shared";
import ArrowBackIcon from "@mui/icons-material/ArrowBack";
import LanguageSelector from "./web-gl/LanguageSelector";

type LeftSidebarProps = {
  open: boolean;
  onToggle: () => void;
};

export const LeftSidebar = observer(({ open, onToggle }: LeftSidebarProps) => {
  const navigate = useNavigate();
  const navigationType = useNavigationType();
  const { routeData } = useMapData();
  const [carrierLogo, setCarrierLogo] = useState<string | null>(null);
  const [carrierSlogan, setCarrierSlogan] = useState<string | null>(null);
  const [carrierShortName, setCarrierShortName] = useState<string | null>(null);

  useEffect(() => {
    async function fetchCarrierData() {
      if (routeData?.carrier_id) {
        const carrier = (
          await authInstance.get(`/carrier/${routeData.carrier_id}`)
        ).data;
        setCarrierLogo(carrier.logo);
        setCarrierSlogan(carrier.slogan ?? null);
        setCarrierShortName(carrier.short_name ?? null);
      }
    }
    fetchCarrierData();
  }, [routeData?.carrier_id]);

  const handleBack = () => {
    if (navigationType === "PUSH") {
      navigate(-1);
    } else {
      navigate("/route");
    }
  };

  return (
    <div
      style={{
        position: "relative",
        width: 288,
        height: "100%",
        color: "#fff",
      }}
    >
      {/* Кнопка назад — вне основного меню */}
      <div style={{ padding: "12px 12px 0" }}>
        <Button
          onClick={handleBack}
          variant="contained"
          sx={{
            backgroundColor: "#222",
            color: "#fff",
            borderRadius: 1.5,
            px: 2,
            py: 1,
            "&:hover": { backgroundColor: "#2d2d2d" },
          }}
          fullWidth
          startIcon={<ArrowBackIcon />}
        >
          Назад
        </Button>
      </div>

      {/* Основное меню — повторяет .side-menu */}
      <div
        style={{
          boxSizing: "border-box",
          paddingTop: 46,
          display: "flex",
          flexDirection: "column",
          alignItems: "center",
          height: "calc(100% - 56px)",
          position: "relative",
          opacity: open ? 1 : 0,
          transition: "opacity 0.25s ease",
          pointerEvents: open ? "auto" : "none",
        }}
      >
        {/* Герб — .side-menu-crest */}
        <div
          style={{
            width: 170,
            height: 170,
            alignSelf: "flex-start",
            marginLeft: 20,
            backgroundColor: "rgba(255,255,255,0.15)",
            borderRadius: 8,
            display: "flex",
            alignItems: "center",
            justifyContent: "center",
            color: "rgba(255,255,255,0.5)",
            fontSize: 14,
            fontWeight: 500,
          }}
        >
          Герб
        </div>

        {/* Слоган — .side-menu-label */}
        {carrierSlogan && (
          <div
            style={{
              marginTop: 10,
              textAlign: "left",
              fontSize: 15,
              padding: "0 20px",
              alignSelf: "flex-start",
              fontWeight: 400,
              lineHeight: "150%",
            }}
          >
            {carrierSlogan}
          </div>
        )}

        {/* Кнопки — .side-menu-buttons */}
        <div style={{ width: 220, marginTop: 260 }}>
          <div
            style={{
              backgroundColor: "#fff",
              color: "#000",
              textAlign: "center",
              padding: "8px 16px",
              marginBottom: 16,
              borderRadius: 10,
            }}
          >
            Достопримечательности
          </div>
          <div
            style={{
              backgroundColor: "#fff",
              color: "#000",
              textAlign: "center",
              padding: "8px 16px",
              marginBottom: 16,
              borderRadius: 10,
            }}
          >
            Остановки
          </div>
        </div>

        {/* Нижняя секция — .side-menu-bottom-section */}
        <div
          style={{
            position: "absolute",
            bottom: 0,
            left: 0,
            width: "100%",
            display: "flex",
            flexDirection: "column",
          }}
        >
          {/* .side-menu-carrier-block */}
          <div style={{ padding: "0 20px" }}>
            {carrierLogo && !isMediaIdEmpty(carrierLogo) && (
              <div style={{ width: 170 }}>
                <MediaViewer
                  media={{
                    id: carrierLogo,
                    media_type: 1,
                    filename: "carrier_logo",
                  }}
                  fullWidth
                />
              </div>
            )}
            {carrierShortName && (
              <div
                style={{
                  marginTop: 4,
                  textAlign: "left",
                  fontSize: 16,
                  fontWeight: 700,
                  lineHeight: "150%",
                  color: "#fff",
                }}
              >
                {carrierShortName}
              </div>
            )}
          </div>

          {/* .side-menu-bottom-photo */}
          <img
            src="/side-menu-photo.png"
            alt=""
            style={{
              width: "288px",
              marginTop: 32,
              display: "block",
              pointerEvents: "none",
            }}
          />
        </div>
      </div>

      <div className="absolute bottom-[20px] -right-[520px] z-10">
        <LanguageSelector onBack={onToggle} isSidebarOpen={open} />
      </div>
    </div>
  );
});
