import React, { useEffect, useState } from "react";
import { useTranslation } from "react-i18next";
import { FlatList, StyleSheet, Text, View } from "react-native";
import _ from "lodash";
import { ActivityIndicator, Card, DataTable, Divider } from "react-native-paper";
import { GET_LINE_TICKET_BY_PK } from "../../graphql/jobs.queries";
import ErrorDisplay from "../error-display/error-display.component";
import { useQuery } from "@apollo/client";
import { connect } from "react-redux";
import { createStructuredSelector } from "reselect";
import { selectBodyshop } from "../../redux/user/user.selectors";
import { selectCurrentEmployee } from "../../redux/employee/employee.selectors";
import { CalculateAllocationsTotals } from "../../util/labor-allocations-table.utility";

const mapStateToProps = createStructuredSelector({
  bodyshop: selectBodyshop,
  technician: selectCurrentEmployee,
});

export function LaborAllocationsTable({ jobId, bodyshop, technician,costCenterDiff,selectedCostCenter, style, shouldRefresh}) {
  const { t } = useTranslation();
  const onRefresh = async () => { return refetch(); };
  const { loading, error, data, refetch } = useQuery(GET_LINE_TICKET_BY_PK, {
    variables: { id: jobId },
    skip: !!!jobId,
    fetchPolicy: "network-only",
    nextFetchPolicy: "network-only",
  });
  if (error) return <ErrorDisplay errorMessage={error.message} />;

  const [totals, setTotals] = useState([]);

  useEffect(() => {
    if (!!data?.joblines && !!data?.timetickets && !!bodyshop){
      let temptotals = CalculateAllocationsTotals(
        bodyshop,
        data?.joblines,
        data?.timetickets,
        data?.adjustments
      );
      if(!!selectedCostCenter){
        let tempCostCenterDiff = Math.round(
          temptotals.find(
            (total) =>
              total["cost_center"] === selectedCostCenter.label
          )?.difference * 10
        ) / 10;
        costCenterDiff.current= tempCostCenterDiff;
      }
      setTotals(
        temptotals
      );
    }
    if (!jobId) setTotals([]);
  }, [data?.joblines, data?.timetickets, bodyshop, data?.adjustments, jobId, selectedCostCenter]);

  useEffect(() => {
    !!shouldRefresh && shouldRefresh ? onRefresh() : null
  },[shouldRefresh]);

  const summary =
    totals &&
    totals.reduce(
      (acc, val) => {
        acc.hrs_total += val.total;
        acc.hrs_claimed += val.claimed;
        acc.adjustments += val.adjustments;
        acc.difference += val.difference;
        return acc;
      },
      { hrs_total: 0, hrs_claimed: 0, adjustments: 0, difference: 0 }
    );
  
  if (loading) return <ActivityIndicator color="dodgerblue" size="large" />;
  return (
    <View style={style}>
      {typeof data !== "undefined" ? (
        <Card style={{ flex: 1 }}>
          <Card.Title title={t("laborallocations.labels.laborallocations")} />
          <Card.Content>
            <View style={localStyles.headerArea}>
              <Text style={localStyles.headertext}>{t("laborallocations.labels.costcenter")}</Text>
              <Text style={localStyles.headertext}>{t("laborallocations.labels.hourstotal")}</Text>
              <Text style={localStyles.headertext}>{t("laborallocations.labels.hoursclaimed")}</Text>
              {/* <Text numberOfLines={2} style={{ flex: 1, flexWrap:'wrap' }}>Hours Claimed</Text> */}
              <Text style={localStyles.headertextAdjusts}>{t("laborallocations.labels.adjustments")}</Text>
              <Text style={localStyles.headertext}>{t("laborallocations.labels.difference")}</Text>
            </View>
            <Divider orientation="vertical" />
          <DataTable>
            <FlatList
              data={totals}
              keyExtractor={(item) => item.cost_center}
              ItemSeparatorComponent={<Divider orientation="vertical" />}
              renderItem={(object) => (
                <DataTable.Row style={{ flex: 1, justifyContent:"space-evenly" }}>
                  <View style={{ flex: 1, alignItems: "flex-start" }}>
                    <Text>
                      {object.item.cost_center} {" ("}
                      {object.item.mod_lbr_ty}
                      {")"}
                    </Text>
                  </View>
                  <View style={{ flex: 1, alignItems: "center" }}>
                    <Text>
                      {object.item.total && object.item.total.toFixed(1)}
                    </Text>
                  </View>
                  <View style={{ flex: 1, alignItems: "center" }}>
                    <Text>
                      {object.item.claimed && object.item.claimed.toFixed(1)}
                    </Text>
                  </View>
                  <View style={{ flex: 1, alignItems: "center" }}>
                    <Text>
                      {object.item.adjustments &&
                        object.item.adjustments.toFixed(1)}
                    </Text>
                  </View>
                  <View style={{ flex: 1, alignItems: "center" }}>
                    <Text
                      style={{
                        color: object.item.difference >= 0 ? "green" : "red",
                      }}
                    >
                      {_.round(object.item.difference, 1)}
                    </Text>
                  </View>
                </DataTable.Row>
              )}
            />
            {summary && (
              <View style={localStyles.headerArea}>
                <Text style={localStyles.footertext}>{t("laborallocations.labels.totals")}</Text>
                <Text style={localStyles.footertext}>
                  {summary.hrs_total.toFixed(1)}
                </Text>
                <Text style={localStyles.footertext}>
                  {summary.hrs_claimed.toFixed(1)}
                </Text>
                <Text style={localStyles.footertext}>
                  {summary.adjustments.toFixed(1)}
                </Text>
                <Text style={localStyles.footertext}>
                  {summary.difference.toFixed(1)}
                </Text>
              </View>
            )}
          </DataTable>
          </Card.Content>
          
        </Card>
      ) : null}
      {/* use "totals" for the rows in the table */}
      {/* use "summary" for the totals at the bottom */}
    </View>
  );
}

const localStyles = StyleSheet.create({
  headerArea: {
    flexDirection: "row",
    justifyContent: "center",
    alignItems: "center",
    margin: 1,
  },
  footertext: {
    flex: 1,
    textAlign: "center",
    textAlignVertical: "center",
    margin: 1,
    paddingBottom: 8,
  },
  headertext: {
    flex: 1,
    textAlign: "center",
    textAlignVertical: "center",
    margin: 1,
    paddingBottom: 8,
  },
  headertextAdjusts: {
    flex: 1,
    textAlign: "center",
    textAlignVertical: "center",
    margin: 1,
    paddingBottom: 8,
  },
});

export default connect(mapStateToProps, null)(LaborAllocationsTable);