import React, { useEffect, useState } from 'react';
import { View, Text, TouchableOpacity, ScrollView } from 'react-native';
import ReactModal from 'react-native-modal';
import { useNavigation } from '@react-navigation/native';

import { PageWrapper, Header, Input, WarningModal } from 'src/components';
import RegionItem from '../Components/RegionItem';
import RangeCalendar from 'src/components/Calendars/RangeCalendar';

import { StoreType, storage } from 'src/storage';
import { Colors } from 'src/theme';
import { NAVIGATION_PAGES } from 'src/types';
import { RegionAddData } from '../utils/types';
import {
  useGetTripQuery,
  usePostDeleteTripMutation,
  usePostUpdateTripMutation,
  usePostSetNewTripMutation
} from '@api/trips';
import { qualityOptions } from '../utils/constants';
import { styles } from './styles';

import CalendarSvg from '../../../../../assets/icons/calendar.svg';

const AddNewTripScreen = ({ route }: { route: any }) => {
  const editTripId = route.params?.editTripId ?? null;
  const token = storage.get('token', StoreType.STRING) as string;
  const { data: editData } = useGetTripQuery(token, editTripId, Boolean(editTripId));
  const navigation = useNavigation();
  const [calendarVisible, setCalendarVisible] = useState(false);
  const [selectedDates, setSelectedDates] = useState<string | null>(null);
  const [description, setDescription] = useState<string>('');
  const [regions, setRegions] = useState<RegionAddData[] | null>(null);
  const [disabled, setDisabled] = useState(true);
  const [qualitySelectorVisible, setQualitySelectorVisible] = useState(false);
  const [selectedRegionId, setSelectedRegionId] = useState<number | null>(null);
  const [isWarningModalVisible, setIsWarningModalVisible] = useState(false);

  const { mutate: saveNewTrip } = usePostSetNewTripMutation();
  const { mutate: updateTrip } = usePostUpdateTripMutation();
  const { mutate: deleteTrip } = usePostDeleteTripMutation();

  useEffect(() => {
    if (route.params?.regionsToSave) {
      setRegions((currentRegions) => {
        const newRegionsIds = route.params.regionsToSave.map((region: RegionAddData) => region.id);
        const existingRegions = currentRegions?.filter((region) =>
          newRegionsIds.includes(region.id)
        );

        const updatedRegions = route.params.regionsToSave.map((newRegion: RegionAddData) => {
          const existingRegion = existingRegions?.find((region) => region.id === newRegion.id);

          return {
            ...newRegion,
            quality: existingRegion ? existingRegion.quality : 3,
            status: existingRegion ? existingRegion.status : 0,
            can_be_hidden: existingRegion ? existingRegion.can_be_hidden : newRegion.hidden,
            hidden: existingRegion ? existingRegion.hidden : false
          };
        });

        return updatedRegions;
      });
    }
  }, [route.params?.regionsToSave]);

  function extractNumberAndExtension(path: string | null) {
    if (!path) return null;
    const slashIndex = path.lastIndexOf('/');
    return path.substring(slashIndex + 1);
  }

  useEffect(() => {
    if (editData && editData.trip) {
      setSelectedDates(editData.trip.date_from + ' - ' + editData.trip.date_to);
      setDescription(editData.trip.description);
      setRegions(
        editData.trip.regions.map((region: any) => {
          return {
            ...region,
            flag1: extractNumberAndExtension(region.flag1),
            flag2: extractNumberAndExtension(region.flag2)
          };
        })
      );
    }
  }, [editData]);

  useEffect(() => {
    if (regions?.length && selectedDates) {
      setDisabled(false);
    } else {
      setDisabled(true);
    }
  }, [regions, selectedDates]);

  const changeQualityForRegion = (regionId: number | null, newQuality: number) => {
    regions &&
      setRegions(
        regions.map((region) => {
          if (region.id === regionId) {
            return { ...region, quality: newQuality };
          }
          return region;
        })
      );
  };

  const changeStatusForRegion = (regionId: number | null) => {
    regions &&
      setRegions(
        regions.map((region) => {
          if (region.id === regionId) {
            return { ...region, status: region.status === 1 ? 0 : 1 };
          }
          return region;
        })
      );
  };

  const changeHiddenForRegion = (regionId: number | null) => {
    regions &&
      setRegions(
        regions.map((region) => {
          if (region.id === regionId) {
            return { ...region, hidden: !region.hidden };
          }
          return region;
        })
      );
  };

  const handleDeleteRegion = (regionId: number) => {
    regions && setRegions(regions.filter((region) => region.id !== regionId));
  };

  const handleDeleteTrip = () => {
    deleteTrip(
      {
        token,
        trip_id: editTripId
      },
      {
        onSuccess: () => {
          setIsWarningModalVisible(false);
          navigation.navigate(...([NAVIGATION_PAGES.TRIPS, { deleted: true }] as never));
        }
      }
    );
  };

  const handleSaveNewTrip = () => {
    if (regions && selectedDates) {
      const isStartDateInFuture =
        selectedDates.split(' - ')[0] > new Date().toISOString().split('T')[0];
      const regionsData = regions.map((region) => {
        return {
          id: region.id,
          quality: region.quality ?? 3,
          status: isStartDateInFuture ? 0 : (Number(region.status) as 0 | 1),
          hidden: region.hidden
        };
      });

      saveNewTrip(
        {
          token,
          date_from: selectedDates.split(' - ')[0],
          date_to: selectedDates.split(' - ')[1],
          description,
          regions: regionsData
        },
        {
          onSuccess: () => {
            navigation.navigate(...([NAVIGATION_PAGES.TRIPS, { saved: true }] as never));
          }
        }
      );
    }
  };

  const handleUpdateTrip = () => {
    if (regions && selectedDates) {
      const isStartDateInFuture =
        selectedDates.split(' - ')[0] > new Date().toISOString().split('T')[0];
      const regionsData = regions.map((region) => {
        return {
          id: region.id,
          quality: region.quality ?? 3,
          status: isStartDateInFuture ? 0 : (Number(region.status) as 0 | 1),
          hidden: region.hidden
        };
      });

      updateTrip(
        {
          token,
          trip_id: editTripId,
          date_from: selectedDates.split(' - ')[0],
          date_to: selectedDates.split(' - ')[1],
          description,
          regions: regionsData
        },
        {
          onSuccess: (res) => {
            navigation.navigate(...([NAVIGATION_PAGES.TRIPS, { updated: true }] as never));
          }
        }
      );
    }
  };

  return (
    <PageWrapper style={{ flex: 1 }}>
      <Header label={editTripId ? 'Edit Trip' : 'Add New Trip'} />
      <ScrollView
        contentContainerStyle={{ flexGrow: 1, gap: 16 }}
        showsVerticalScrollIndicator={false}
      >
        <TouchableOpacity style={styles.regionSelector} onPress={() => setCalendarVisible(true)}>
          <CalendarSvg />
          <Text style={styles.regionText}>{selectedDates ?? 'Add dates'}</Text>
        </TouchableOpacity>

        <Input
          placeholder="Add description and all interesting moments of your trip"
          inputMode={'text'}
          onChange={(text) => setDescription(text)}
          value={description}
          header="Description"
          height={54}
          multiline={true}
        />

        <View style={{ marginBottom: 8 }}>
          <Text style={styles.regionsLabel}>Regions</Text>
          <TouchableOpacity
            style={styles.addRegionBtn}
            onPress={() =>
              navigation.navigate(
                ...([
                  NAVIGATION_PAGES.ADD_REGIONS,
                  { regionsParams: regions, editId: editTripId }
                ] as never)
              )
            }
          >
            <Text style={styles.addRegionBtntext}>Add Region</Text>
          </TouchableOpacity>
          {regions && regions.length ? (
            <View style={styles.regionsContainer}>
              {regions.map((region) => {
                return (
                  <RegionItem
                    key={region.id}
                    region={region}
                    onDelete={() => handleDeleteRegion(region.id)}
                    onToggleStatus={() => changeStatusForRegion(region.id)}
                    onQualityChange={() => {
                      setSelectedRegionId(region.id);
                      setQualitySelectorVisible(true);
                    }}
                    onHiddenChange={() => changeHiddenForRegion(region.id)}
                    startDate={selectedDates ? selectedDates.split(' - ')[0] : null}
                    endDate={selectedDates ? selectedDates.split(' - ')[1] : null}
                    isEditing={editTripId}
                  />
                );
              })}
            </View>
          ) : (
            <Text style={styles.noRegiosText}>No regions at the moment</Text>
          )}
        </View>
      </ScrollView>

      <View style={styles.tabContainer}>
        {editTripId ? (
          <>
            <TouchableOpacity
              style={[styles.tabStyle, styles.deleteTab]}
              onPress={() => setIsWarningModalVisible(true)}
            >
              <Text style={[styles.tabText, styles.deleteTabText]}>Delete Trip</Text>
            </TouchableOpacity>
            <TouchableOpacity
              style={[
                styles.tabStyle,
                styles.addNewTab,
                disabled && { backgroundColor: Colors.LIGHT_GRAY, borderColor: Colors.LIGHT_GRAY }
              ]}
              onPress={handleUpdateTrip}
              disabled={disabled}
            >
              <Text style={[styles.tabText, styles.addNewTabText]}>Save Trip</Text>
            </TouchableOpacity>
          </>
        ) : (
          <TouchableOpacity
            style={[
              styles.tabStyle,
              styles.addNewTab,
              disabled && { backgroundColor: Colors.LIGHT_GRAY, borderColor: Colors.LIGHT_GRAY },
              { paddingVertical: 12 }
            ]}
            onPress={handleSaveNewTrip}
            disabled={disabled}
          >
            <Text style={[styles.tabText, styles.addNewTabText]}>Add New Trip</Text>
          </TouchableOpacity>
        )}
      </View>

      <RangeCalendar
        isModalVisible={calendarVisible}
        closeModal={(startDate?: string | null, endDate?: string | null) => {
          startDate &&
            setSelectedDates(
              startDate.toString() + ' - ' + (endDate ? endDate?.toString() : startDate?.toString())
            );
          setCalendarVisible(false);
        }}
      />
      <ReactModal
        isVisible={qualitySelectorVisible}
        onBackdropPress={() => setQualitySelectorVisible(false)}
        style={styles.modal}
        statusBarTranslucent={true}
        presentationStyle="overFullScreen"
      >
        <View style={styles.wrapper}>
          <View style={{ paddingBottom: 16 }}>
            {qualityOptions.map((option) => (
              <TouchableOpacity
                key={option.id}
                style={styles.btnOption}
                onPress={() => {
                  setQualitySelectorVisible(false);
                  changeQualityForRegion(selectedRegionId, option.id);
                }}
              >
                <Text style={styles.btnOptionText}>{option.name}</Text>
              </TouchableOpacity>
            ))}
          </View>
        </View>
      </ReactModal>
      <WarningModal
        type={'delete'}
        isVisible={isWarningModalVisible}
        onClose={() => setIsWarningModalVisible(false)}
        title="Delete Trip"
        message="Are you sure you want to delete your trip?"
        action={handleDeleteTrip}
      />
    </PageWrapper>
  );
};

export default AddNewTripScreen;