import { Modal, vehicleStore } from "@shared";
import {
  Box,
  Button,
  CircularProgress,
  Table,
  TableBody,
  TableCell,
  TableContainer,
  TableHead,
  TableRow,
  Typography,
} from "@mui/material";
import { observer } from "mobx-react-lite";
import { useEffect } from "react";

interface VehicleSessionsModalProps {
  open: boolean;
  vehicleId: number | null;
  tailNumber?: string | null;
  onClose: () => void;
}

const formatDateTime = (value?: string | null) => {
  if (!value) return "-";

  const date = new Date(value);
  if (Number.isNaN(date.getTime())) return value;

  return new Intl.DateTimeFormat("ru-RU", {
    day: "2-digit",
    month: "2-digit",
    year: "numeric",
    hour: "2-digit",
    minute: "2-digit",
    second: "2-digit",
    hour12: false,
  }).format(date);
};

const formatDuration = (durationSeconds?: number | null) => {
  if (durationSeconds == null || !Number.isFinite(durationSeconds) || durationSeconds < 0) {
    return "-";
  }

  const hours = Math.floor(durationSeconds / 3600);
  const minutes = Math.floor((durationSeconds % 3600) / 60);
  const seconds = durationSeconds % 60;

  return [hours, minutes, seconds]
    .map((part) => String(part).padStart(2, "0"))
    .join(":");
};

export const VehicleSessionsModal = observer(
  ({ open, vehicleId, tailNumber, onClose }: VehicleSessionsModalProps) => {
    const {
      vehicleSessions,
      vehicleSessionsLoading,
      vehicleSessionsError,
      getVehicleSessions,
    } = vehicleStore;

    useEffect(() => {
      if (!open || vehicleId == null) return;

      getVehicleSessions(vehicleId).catch(() => undefined);
    }, [open, vehicleId, getVehicleSessions]);

    const title =
      tailNumber && tailNumber !== ""
        ? `Сессии ТО: ${tailNumber}`
        : "Сессии ТО";

    return (
      <Modal
        open={open}
        onClose={onClose}
        sx={{ width: "min(1080px, 95vw)", p: 3 }}
      >
        <div className="flex flex-col gap-4 max-h-[82vh]">
          <Typography variant="h6" component="h2">
            {title}
          </Typography>

          <Box sx={{ minHeight: 220 }}>
            {vehicleSessionsLoading && (
              <Box
                sx={{
                  minHeight: 220,
                  display: "flex",
                  alignItems: "center",
                  justifyContent: "center",
                }}
              >
                <CircularProgress size={24} />
              </Box>
            )}

            {!vehicleSessionsLoading && vehicleSessionsError && (
              <Box
                sx={{
                  minHeight: 220,
                  display: "flex",
                  alignItems: "center",
                  justifyContent: "center",
                  color: "error.main",
                }}
              >
                {vehicleSessionsError}
              </Box>
            )}

            {!vehicleSessionsLoading &&
              !vehicleSessionsError &&
              vehicleSessions &&
              vehicleSessions.length === 0 && (
                <Box
                  sx={{
                    minHeight: 220,
                    display: "flex",
                    alignItems: "center",
                    justifyContent: "center",
                    color: "text.secondary",
                  }}
                >
                  По этому транспорту нет сессий ТО.
                </Box>
              )}

            {!vehicleSessionsLoading &&
              !vehicleSessionsError &&
              vehicleSessions &&
              vehicleSessions.length > 0 && (
                <TableContainer
                  sx={{ maxHeight: "60vh", border: 1, borderColor: "divider" }}
                >
                  <Table stickyHeader size="small">
                    <TableHead>
                      <TableRow>
                        <TableCell>ID</TableCell>
                        <TableCell>Начало</TableCell>
                        <TableCell>Окончание</TableCell>
                        <TableCell align="right">Длительность</TableCell>
                      </TableRow>
                    </TableHead>
                    <TableBody>
                      {vehicleSessions.map((session) => (
                        <TableRow key={session.id} hover>
                          <TableCell>{session.id}</TableCell>
                          <TableCell>
                            {formatDateTime(session.started_at)}
                          </TableCell>
                          <TableCell>
                            {session.ended_at ? formatDateTime(session.ended_at) : "В процессе"}
                          </TableCell>
                          <TableCell align="right">
                            {session.ended_at ? formatDuration(session.duration_seconds) : "—"}
                          </TableCell>
                        </TableRow>
                      ))}
                    </TableBody>
                  </Table>
                </TableContainer>
              )}
          </Box>

          <Button
            variant="outlined"
            color="inherit"
            onClick={onClose}
            fullWidth
          >
            Закрыть
          </Button>
        </div>
      </Modal>
    );
  },
);