import KeepAwake from '@sayem314/react-native-keep-awake';
import React, { useEffect, useRef, useState } from 'react';
import { Modal, SafeAreaView, Text, View } from 'react-native';
import Animated from 'react-native-reanimated';
import { useSafeAreaInsets } from 'react-native-safe-area-context';
import Editor from '../../screens/editor';
import { editorController } from '../../screens/editor/tiptap/utils';
import { DDS } from '../../services/device-detection';
import { eSendEvent, eSubscribeEvent, eUnSubscribeEvent } from '../../services/event-manager';
import Navigation from '../../services/navigation';
import Sync from '../../services/sync';
import { useThemeStore } from '../../stores/use-theme-store';
import { dHeight } from '../../utils';
import { db } from '../../utils/database';
import { eOnLoadNote, eShowMergeDialog } from '../../utils/events';
import { SIZE } from '../../utils/size';
import { timeConverter } from '../../utils/time';
import BaseDialog from '../dialog/base-dialog';
import DialogButtons from '../dialog/dialog-buttons';
import DialogContainer from '../dialog/dialog-container';
import DialogHeader from '../dialog/dialog-header';
import { Button } from '../ui/button';
import { IconButton } from '../ui/icon-button';
import Seperator from '../ui/seperator';
import Paragraph from '../ui/typography/paragraph';

const MergeConflicts = () => {
  const colors = useThemeStore(state => state.colors);
  const [visible, setVisible] = useState(false);
  const [keep, setKeep] = useState(null);
  const [copy, setCopy] = useState(null);
  const [dialogVisible, setDialogVisible] = useState(false);
  const insets = useSafeAreaInsets();
  const content = useRef({});
  const isKeepingConflicted = !keep?.conflicted;
  const isKeeping = !!keep;

  const applyChanges = async () => {
    let _content = keep;
    let note = db.notes.note(_content.noteId).data;
    await db.notes.add({
      id: note.id,
      conflicted: false,
      dateEdited: _content.dateEdited
    });

    await db.content.add({
      id: note.contentId,
      data: _content.data,
      type: _content.type,
      dateResolved: content.current.conflicted.dateModified,
      sessionId: Date.now(),
      conflicted: false
    });

    if (copy) {
      await db.notes.add({
        title: note.title + ' (Copy)',
        content: {
          data: copy.data,
          type: copy.type
        }
      });
    }
    Navigation.queueRoutesForUpdate(
      'Notes',
      'Favorites',
      'ColoredNotes',
      'TaggedNotes',
      'TopicNotes'
    );
    if (editorController.current?.note?.id === note.id) {
      //TODO
    }
    close();
    await Sync.run();
  };

  const show = async item => {
    let noteContent = await db.content.raw(item.contentId);
    content.current = { ...noteContent };
    if (!noteContent.conflicted) {
      content.current.conflicted = { ...noteContent };
    }
    setVisible(true);
  };

  useEffect(() => {
    eSubscribeEvent(eShowMergeDialog, show);
    return () => {
      eUnSubscribeEvent(eShowMergeDialog, show);
    };
  }, []);

  const close = () => {
    setVisible(false);
    setCopy(null);
    setKeep(null);
    setDialogVisible(false);
  };

  const ConfigBar = ({ isDiscarded, keeping, back, isCurrent, contentToKeep }) => {
    return (
      <View
        style={{
          width: '100%',
          height: 50,
          flexDirection: 'row',
          justifyContent: 'space-between',
          alignItems: 'center',
          paddingHorizontal: 12,
          paddingLeft: 6
        }}
      >
        <View
          style={{
            flexDirection: 'row',
            alignItems: 'center',
            justifyContent: 'space-between',
            flexShrink: 1
          }}
        >
          {back && <IconButton onPress={close} color={colors.pri} name="arrow-left" />}
          <Paragraph style={{ flexWrap: 'wrap' }} color={colors.icon} size={SIZE.xs}>
            <Text style={{ color: isCurrent ? colors.accent : colors.red, fontWeight: 'bold' }}>
              {isCurrent ? '(This Device)' : '(Incoming)'}
            </Text>
            {'\n'}
            {timeConverter(contentToKeep.dateEdited)}
          </Paragraph>
        </View>

        <View
          style={{
            flexDirection: 'row',
            alignItems: 'center',
            justifyContent: 'flex-end'
          }}
        >
          {isDiscarded ? (
            <Button
              onPress={() => {
                setCopy(contentToKeep);
                setDialogVisible(true);
              }}
              title="Save a copy"
              type="grayBg"
              height={30}
              style={{
                borderRadius: 100,
                paddingHorizontal: 12
              }}
              fontSize={SIZE.xs}
            />
          ) : null}
          <View style={{ width: 10 }} />
          {isDiscarded ? (
            <Button
              title="Discard"
              type="accent"
              accentColor="red"
              height={30}
              style={{
                borderRadius: 100,
                paddingHorizontal: 12
              }}
              fontSize={SIZE.xs}
              accentText="light"
              color={colors.errorText}
              onPress={() => {
                setDialogVisible(true);
              }}
            />
          ) : null}
          {isDiscarded ? null : (
            <>
              <Button
                height={30}
                style={{
                  borderRadius: 100,
                  paddingHorizontal: 12,
                  minWidth: 60,
                  marginLeft: 10
                }}
                type="accent"
                fontSize={SIZE.xs}
                title={keeping && !isDiscarded ? 'Undo' : 'Keep'}
                onPress={() => {
                  setKeep(keeping && !isDiscarded ? null : contentToKeep);
                }}
              />
            </>
          )}
        </View>
      </View>
    );
  };

  return !visible ? null : (
    <Modal
      statusBarTranslucent
      transparent={false}
      animationType="slide"
      onRequestClose={() => {
        close();
      }}
      supportedOrientations={[
        'portrait',
        'portrait-upside-down',
        'landscape',
        'landscape-left',
        'landscape-right'
      ]}
      visible={true}
    >
      <SafeAreaView
        style={{
          backgroundColor: colors.bg,
          paddingTop: insets.top
        }}
      >
        <KeepAwake />
        {dialogVisible && (
          <BaseDialog visible={true}>
            <DialogContainer>
              <DialogHeader
                title="Apply Changes"
                paragraph="Apply selected changes to note?"
                padding={12}
              />
              <Seperator />
              <DialogButtons
                positiveTitle="Apply"
                negativeTitle="Cancel"
                onPressNegative={() => setDialogVisible(false)}
                onPressPositive={applyChanges}
              />
            </DialogContainer>
          </BaseDialog>
        )}

        <View
          style={{
            height: '100%',
            width: '100%',
            backgroundColor: DDS.isLargeTablet() ? 'rgba(0,0,0,0.3)' : null
          }}
        >
          <ConfigBar
            back={true}
            isCurrent={true}
            isDiscarded={isKeeping && isKeepingConflicted}
            keeping={isKeeping}
            contentToKeep={content.current}
          />

          <Animated.View
            style={{
              height: dHeight / 2 - (50 + insets.top / 2),
              backgroundColor: colors.bg,
              borderBottomWidth: 1,
              borderBottomColor: colors.nav
            }}
          >
            <Editor
              noHeader
              noToolbar
              readonly
              editorId=":conflictPrimary"
              onLoad={() => {
                const note = db.notes.note(content.current?.noteId)?.data;
                if (!note) return;
                eSendEvent(eOnLoadNote + ':conflictPrimary', { ...note, content: content.current });
              }}
            />
          </Animated.View>

          <ConfigBar
            back={false}
            isCurrent={false}
            isDiscarded={isKeeping && !isKeepingConflicted}
            keeping={isKeeping}
            contentToKeep={content.current.conflicted}
          />

          <Animated.View
            style={{
              height: dHeight / 2 - (50 + insets.top / 2),
              backgroundColor: colors.bg,
              borderRadius: 10
            }}
          >
            <Editor
              noHeader
              noToolbar
              readonly
              editorId=":conflictSecondary"
              onLoad={() => {
                const note = db.notes.note(content.current?.noteId)?.data;
                if (!note) return;
                eSendEvent(eOnLoadNote + ':conflictSecondary', {
                  ...note,
                  content: content.current.conflicted
                });
              }}
            />
          </Animated.View>
        </View>
      </SafeAreaView>
    </Modal>
  );
};

export default MergeConflicts;