import React, { useContext, useReducer, useEffect, useState } from "react";

import Paper from "@material-ui/core/Paper";
import Container from "@material-ui/core/Container";
import Grid from "@material-ui/core/Grid";
import { makeStyles } from "@material-ui/core/styles";
import Typography from "@material-ui/core/Typography";
import Card from "@mui/material/Card";
import CardHeader from "@mui/material/CardHeader";
import CardContent from "@mui/material/CardContent";
import CardActions from "@mui/material/CardActions";
import Avatar from "@mui/material/Avatar";
import Tooltip from "@mui/material/Tooltip";
import Zoom from "@mui/material/Zoom";
import IconButton from "@mui/material/IconButton";
import Box from "@mui/material/Box";
import InputLabel from "@mui/material/InputLabel";
import MenuItem from "@mui/material/MenuItem";
import FormControl from "@mui/material/FormControl";
import Select from "@mui/material/Select";
import TextField from "@mui/material/TextField";
import Info from "@material-ui/icons/Info";
import CancelIcon from "@material-ui/icons/Cancel";
import CheckCircleIcon from "@material-ui/icons/CheckCircle";
import ErrorIcon from "@material-ui/icons/Error";
import RemoveCircleIcon from "@material-ui/icons/RemoveCircle";

import useTickets from "../../hooks/useTickets";

import { AuthContext } from "../../context/Auth/AuthContext";

import { i18n } from "../../translate/i18n";

import Chart from "./Chart";

import openSocket from "socket.io-client";

import api from "../../services/api";

import { Can } from "../../components/Can";

import { Button } from "@material-ui/core";
import { id } from "date-fns/locale";

const useStyles = makeStyles((theme) => ({
  container: {
    paddingTop: theme.spacing(4),
    paddingBottom: theme.spacing(4),
  },
  fixedHeightPaper: {
    padding: theme.spacing(2),
    display: "flex",
    overflow: "auto",
    flexDirection: "column",
    height: 240,
  },
  customFixedHeightPaper: {
    padding: theme.spacing(2),
    display: "flex",
    overflow: "auto",
    flexDirection: "column",
    height: 120,
  },
  customFixedHeightPaperLg: {
    padding: theme.spacing(2),
    display: "flex",
    overflow: "auto",
    flexDirection: "column",
    height: "100%",
  },
  containerPaperFix: {
    textTransform: "capitalize",
    padding: theme.spacing(2),
    paddingBottom: theme.spacing(4),
    height: "auto",
    overflowY: "hidden",
  },
  cardPaperFix: {
    textTransform: "capitalize",
    padding: theme.spacing(2),
    paddingBottom: theme.spacing(4),
    height: "500px",
    overflowY: "scroll",
  },
  cardStyleFix: {
    display: "flex",
    flexDirection: "row",
    justifyContent: "left",
    alignItems: "center",
    gap: "32px",
  },
  logginBtn: {
    position: "absolute",
    bottom: "21px",
    right: "21px",
    fontSize: "12px",
  },
}));

const reducer = (state, action) => {
  if (action.type === "DELETE_USER_STATUS") {
    const userId = action.payload;

    const userIndex = state.findIndex((u) => `${u.id}` === `${userId}`);

    if (userIndex !== -1) {
      state.splice(userIndex, 1);
    }

    return [...state];
  }

  if (action.type === "LOAD_QUERY") {
    const queries = action.payload;
    const newQueries = [];

    queries.forEach((query) => {
      const queryIndex = state.findIndex((q) => q.id === query.id);

      if (queryIndex !== -1) {
        state[queryIndex] = query;
      } else {
        newQueries.push(query);
      }
    });

    return [...state, ...newQueries];
  }

  if (action.type === "UPDATE_STATUS_ONLINE") {
    let onlineUser = action.payload;
    let index = -1;

    let onlySumOpenClosed = false;

    if (onlineUser.sumOpen || onlineUser.sumClosed) {
      index = state.findIndex(
        (e) =>
          (onlineUser.sumOpen && e.id === onlineUser.sumOpen.userId) ||
          (onlineUser.sumClosed && e.id === onlineUser.sumClosed.userId)
      );

      onlySumOpenClosed = true;
    } else {
      index = state.findIndex((e) => `${e.id}` === `${onlineUser.userId}`);
    }

    if (index !== -1) {
      if (!onlySumOpenClosed) {
        if (!("statusOnline" in state[index])) {
          state[index].statusOnline = onlineUser;
        } else if ("statusOnline" in state[index]) {
          state[index].statusOnline["status"] = onlineUser.status;
        }
      }

      if ("onlineTime" in onlineUser) {
        if ("sumOnlineTime" in state[index]) {
          state[index].sumOnlineTime["sum"] = onlineUser.onlineTime.split(" ")[1];
        } else if (!("sumOnlineTime" in state[index])) {
          state[index].sumOnlineTime = {
            userId: onlineUser.userId,
            sum: onlineUser.onlineTime.split(" ")[1],
          };
        }
      }

      if (onlineUser.sumOpen) {
        if ("sumOpen" in state[index]) {
          state[index].sumOpen["count"] = onlineUser.sumOpen.count;
        } else if (!("sumOpen" in state[index])) {
          state[index].sumOpen = onlineUser.sumOpen;
        }
      }

      if (onlineUser.sumClosed) {
        if ("sumClosed" in state[index]) {
          state[index].sumClosed["count"] = onlineUser.sumClosed.count;
        } else if (!("sumClosed" in state[index])) {
          state[index].sumClosed = onlineUser.sumClosed;
        }
      }
    }
    return [...state];
  }

  if (action.type === "RESET") {
    return [];
  }
};

const Dashboard = () => {
  const classes = useStyles();
  const [usersOnlineInfo, dispatch] = useReducer(reducer, []);
  const [search, setSearch] = useState("");
  const [filterStatus, setFilterStatus] = useState(null);
  const { user } = useContext(AuthContext);
  var userQueueIds = [];

  if (user.queues && user.queues.length > 0) {
    userQueueIds = user.queues.map((q) => q.id);
  }

  const GetTickets = (status, showAll, withUnreadMessages, unlimited) => {
    const { tickets } = useTickets({
      status: status,
      showAll: showAll,
      withUnreadMessages: withUnreadMessages,
      queueIds: JSON.stringify(userQueueIds),
      unlimited: unlimited,
    });
    return tickets.length;
  };

  useEffect(() => {
    dispatch({ type: "RESET" });
  }, []);

  const handleLogouOnlineUser = async (userId) => {
    try {
      await api.get(`/users/logout/${userId}`);
      //toast.success(("Desloged!"));
      //handleDeleteRows(scheduleId)
    } catch (err) {
      // toastError(err);
    }
  };

  useEffect(() => {
    //setLoading(true);

    const delayDebounceFn = setTimeout(() => {
      // setLoading(true);
      const fetchQueries = async () => {
        try {
          let date = new Date().toLocaleDateString("pt-BR").split("/");
          let dateToday = `${date[2]}-${date[1]}-${date[0]}`;

          const dataQuery = await api.get("/reports/user/services", {
            params: { userId: null, startDate: dateToday, endDate: dateToday },
          });
          dispatch({ type: "RESET" });
          dispatch({ type: "LOAD_QUERY", payload: dataQuery.data });

          //console.log()
        } catch (err) {
          console.log(err);
        }
      };

      fetchQueries();
    }, 500);
    return () => clearTimeout(delayDebounceFn);
  }, []);

  useEffect(() => {
    const socket = openSocket(process.env.REACT_APP_BACKEND_URL);

    socket.on("onlineStatus", (data) => {
      if (data.action === "logout" || data.action === "update") {
        dispatch({ type: "UPDATE_STATUS_ONLINE", payload: data.userOnlineTime });
      } else if (data.action === "delete") {
        dispatch({ type: "DELETE_USER_STATUS", payload: data.userOnlineTime });
      }
    });

    socket.on("user", (data) => {
      if (data.action === "delete") {
        // console.log(' entrou no delete user: ', data)
        dispatch({ type: "DELETE_USER", payload: +data.userId });
      }
    });

    return () => {
      socket.disconnect();
    };
  }, []);

  const handleFilterChange = (event) => {
    setFilterStatus(event.target.value);
  };
  const handlesearch = (event) => {
    setSearch(event.target.value.toLowerCase());
  };

  return (
    <Can
      role={user.profile}
      perform="dashboard-view:show"
      yes={() => (
        <Container maxWidth="lg" className={classes.container}>
          <Grid container spacing={3}>
            <Paper className={classes.containerPaperFix} sx={12}>
              <Grid item sx={4}>
                <Typography
                  component="h1"
                  variant="h4"
                  color="primary"
                  style={{ marginBottom: "16px" }}
                >
                  tickets
                  <Tooltip
                    title={`Os dados informados abaixo é baseado na data: ${new Date().toLocaleDateString()}`}
                    color="primary"
                    TransitionComponent={Zoom}
                  >
                    <IconButton>
                      <Info />
                    </IconButton>
                  </Tooltip>
                </Typography>
              </Grid>
              <Grid container spacing={3}>
                <Grid item xs={12} sm={6} md={6} lg={4}>
                  <Paper
                    className={classes.customFixedHeightPaper}
                    style={{ overflow: "hidden" }}
                    variant="outlined"
                  >
                    <Typography component="h3" variant="h6" color="primary" paragraph>
                      {i18n.t("dashboard.messages.inAttendance.title")}
                    </Typography>
                    <Grid item>
                      <Typography component="h1" variant="h4">
                        {GetTickets("open", "true", "false", "true")}
                      </Typography>
                    </Grid>
                  </Paper>
                </Grid>
                <Grid item xs={12} sm={6} md={6} lg={4}>
                  <Paper
                    className={classes.customFixedHeightPaper}
                    style={{ overflow: "hidden" }}
                    variant="outlined"
                  >
                    <Typography component="h3" variant="h6" color="primary" paragraph>
                      {i18n.t("dashboard.messages.waiting.title")}
                    </Typography>
                    <Grid item>
                      <Typography component="h1" variant="h4">
                        {GetTickets("pending", "true", "false", "true")}
                      </Typography>
                    </Grid>
                  </Paper>
                </Grid>
                <Grid item xs={12} sm={6} md={6} lg={4}>
                  <Paper
                    className={classes.customFixedHeightPaper}
                    style={{ overflow: "hidden" }}
                    variant="outlined"
                  >
                    <Typography component="h3" variant="h6" color="primary" paragraph>
                      {i18n.t("dashboard.messages.closed.title")}
                    </Typography>
                    <Grid item>
                      <Typography component="h1" variant="h4">
                        {GetTickets("closed", "true", "false", "true")}
                      </Typography>
                    </Grid>
                  </Paper>
                </Grid>
                <Grid item xs={12}>
                  <Paper className={classes.fixedHeightPaper} variant="outlined">
                    <Chart />
                  </Paper>
                </Grid>
              </Grid>
            </Paper>
            <Paper className={classes.containerPaperFix} style={{marginTop:"21px"}} sx={12}>
              <Grid item sx={4}>
                <Typography
                  component="h1"
                  variant="h4"
                  color="primary"
                  style={{ marginBottom: "16px" }}
                >
                  Usuários
                  <Tooltip
                    title={`Os dados informados abaixo é baseado na data: ${new Date().toLocaleDateString()}`}
                    color="primary"
                    TransitionComponent={Zoom}
                  >
                    <IconButton>
                      <Info />
                    </IconButton>
                  </Tooltip>
                </Typography>
              </Grid>
              <Grid container spacing={3}>
                <Grid item xs={12} sm={6} md={6} lg={4}>
                  <Paper
                    className={classes.customFixedHeightPaper}
                    style={{ overflow: "hidden" }}
                    variant="outlined"
                  >
                    <Typography component="h3" variant="h6" color="primary" paragraph>
                      Total de Agentes
                    </Typography>
                    <Grid item>
                      <Typography component="h1" variant="h4">
                        {usersOnlineInfo.length}
                      </Typography>
                    </Grid>
                  </Paper>
                </Grid>
                <Grid item xs={12} sm={6} md={6} lg={4}>
                  <Paper
                    className={classes.customFixedHeightPaper}
                    style={{ overflow: "hidden" }}
                    variant="outlined"
                  >
                    <Typography component="h3" variant="h6" color="primary" paragraph>
                      Online
                    </Typography>
                    <Grid item>
                      <Typography component="h1" variant="h4">
                        {
                          usersOnlineInfo.filter(
                            (status) =>
                              status.statusOnline && status.statusOnline.status === "online"
                          ).length
                        }
                      </Typography>
                    </Grid>
                  </Paper>
                </Grid>
                <Grid item xs={12} sm={6} md={6} lg={4}>
                  <Paper
                    className={classes.customFixedHeightPaper}
                    style={{ overflow: "hidden" }}
                    variant="outlined"
                  >
                    <Typography component="h3" variant="h6" color="primary" paragraph>
                      Offline
                    </Typography>
                    <Grid item>
                      <Typography component="h1" variant="h4">
                        {
                          usersOnlineInfo.filter(
                            (status) =>
                              !status.statusOnline || status.statusOnline.status === "offline"
                          ).length
                        }
                      </Typography>
                    </Grid>
                  </Paper>
                </Grid>
                <Grid item xs={12}>
                  <Paper className={classes.cardPaperFix} sx={12} variant="outlined">
                    <Grid container sx={12} justifyContent="space-between">
                      <Grid item sx={4}>
                        <Typography
                          component="h4"
                          variant="h6"
                          color="primary"
                          style={{ marginBottom: "16px" }}
                        >
                          Lista de Usuários
                        </Typography>
                      </Grid>
                      <Grid item sx={8} width="100%">
                        <Box sx={{ marginBottom: 2, display: "flex", gap: "12px" }}>
                          <TextField
                            id="outlined-basic"
                            label="Usuário"
                            variant="standard"
                            value={search}
                            onChange={handlesearch}
                          />
                          <FormControl fullWidth variant="standard">
                            <InputLabel id="status">Status</InputLabel>
                            <Select
                              labelId="status"
                              id="status"
                              value={filterStatus}
                              label="Status"
                              onChange={handleFilterChange}
                            >
                              <MenuItem value={null}>Todos</MenuItem>
                              <MenuItem value={"online"}>Online</MenuItem>
                              <MenuItem value={"offline"}>Offline</MenuItem>
                              <MenuItem value={"not"}>Não entrou</MenuItem>
                            </Select>
                          </FormControl>
                        </Box>
                      </Grid>
                    </Grid>

                    <Grid container spacing={3}>
                      {usersOnlineInfo &&
                        usersOnlineInfo
                          .filter((e) => {
                            if (filterStatus === null) return e;
                            if (filterStatus === "not") return !e.statusOnline;
                            return e.statusOnline && e.statusOnline.status === filterStatus;
                          })
                          .filter((e) => {
                            return e.name.toLowerCase().includes(search);
                          })
                          .map((user, index) => (
                            <Grid
                              item
                              xs={12}
                              sm={6}
                              md={6}
                              lg={3}
                              key={index}
                              style={{ position: "relative" }}
                            >
                              <Card variant="outlined">
                                <CardHeader
                                  avatar={
                                    <Avatar
                                      style={{
                                        backgroundColor: user.statusOnline
                                          ? user.statusOnline.status === "online"
                                            ? "green"
                                            : user.statusOnline.status === "offline"
                                            ? "red"
                                            : "black"
                                          : "grey",
                                      }}
                                    >
                                      {user.statusOnline ? (
                                        user.statusOnline.status === "online" ? (
                                          <CheckCircleIcon style={{ color: "white" }} />
                                        ) : user.statusOnline.status === "offline" ? (
                                          <CancelIcon style={{ color: "white" }} />
                                        ) : (
                                          <ErrorIcon style={{ color: "yellow" }} />
                                        )
                                      ) : (
                                        <RemoveCircleIcon style={{ color: "black" }} />
                                      )}
                                    </Avatar>
                                  }
                                  title={
                                    <Typography variant="h5" component="div">
                                      {user.name}
                                    </Typography>
                                  }
                                />

                                <CardContent>
                                  <Typography variant="h6" component="h1" color="textPrimary">
                                    Em atendimento:
                                    <Typography component="p" color="textPrimary" paragraph>
                                      {user.sumOpen && user.sumOpen.count ? user.sumOpen.count : 0}
                                    </Typography>
                                  </Typography>

                                  <Typography variant="h6" component="h1" color="textPrimary">
                                    Finalizado:
                                    <Typography component="p" color="textPrimary" paragraph>
                                      {user.sumClosed && user.sumClosed.count
                                        ? user.sumClosed.count
                                        : 0}
                                    </Typography>
                                  </Typography>

                                  <Typography variant="h6" component="h1" color="textPrimary">
                                    Tempo online:
                                    <Typography component="p" color="textPrimary" paragraph>
                                      {user.sumOnlineTime && user.sumOnlineTime.sum
                                        ? user.sumOnlineTime.sum
                                        : "Não entrou Hoje"}
                                    </Typography>
                                  </Typography>
                                </CardContent>
                                <CardActions>
                                  {user.statusOnline &&
                                    user.statusOnline.status === "online" &&
                                    user.statusOnline && (
                                      <Button
                                        className={classes.logginBtn}
                                        variant="contained"
                                        color="primary"
                                        onClick={(e) => {
                                          handleLogouOnlineUser(user.id);
                                        }}
                                      >
                                        {"Deslogar"}
                                      </Button>
                                    )}
                                </CardActions>
                              </Card>
                            </Grid>
                          ))}
                    </Grid>
                  </Paper>
                </Grid>
              </Grid>
            </Paper>
          </Grid>
        </Container>
      )}
    />

    /**/
  );
};

export default Dashboard;