import React, { useEffect, useMemo, useRef, useState } from 'react'
import dayjs from 'dayjs'
import { generatePath, Link, useParams } from 'react-router-dom'
import { getNavigationsValue, getFeatures } from '@brojs/cli'
import {
  Breadcrumb,
  BreadcrumbItem,
  BreadcrumbLink,
  Container,
  Box,
  Button,
  useToast,
  Toast,
  TableContainer,
  Table,
  Thead,
  Tr,
  Th,
  Tbody,
  Text,
  AlertDialog,
  AlertDialogBody,
  AlertDialogContent,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogOverlay,
} from '@chakra-ui/react'
import { AddIcon } from '@chakra-ui/icons'

import { useAppSelector } from '../../__data__/store'
import { api } from '../../__data__/api/api'
import { isTeacher } from '../../utils/user'
import { Lesson } from '../../__data__/model'
import { XlSpinner } from '../../components/xl-spinner'

import { LessonForm } from './components/lessons-form'
import { Bar } from './components/bar'
import { LessonItems } from './components/lesson-items'
import { BreadcrumbsWrapper } from './style'

const features = getFeatures('journal')

const barFeature = features?.['lesson.bar']
const groupByDate = features?.['group.by.date']

const LessonList = () => {
  const { courseId } = useParams()
  const user = useAppSelector((s) => s.user)
  const { data, isLoading, error, isSuccess } = api.useLessonListQuery(courseId)
  const [createLesson, crLQuery] = api.useCreateLessonMutation()
  const [deleteLesson, deletingRqst] = api.useDeleteLessonMutation()
  const [updateLesson, updateLessonRqst] = api.useUpdateLessonMutation()
  const [showForm, setShowForm] = useState(false)
  const [lessonToDelete, setlessonToDelete] = useState<Lesson>(null)
  const cancelRef = React.useRef()
  const toast = useToast()
  const toastRef = useRef(null)
  const createdLessonRef = useRef(null)
  const [editLesson, setEditLesson] = useState<Lesson>(null)
  const sorted = useMemo(
    () => [...(data?.body || [])]?.sort((a, b) => (a.date > b.date ? 1 : -1)),
    [data, data?.body],
  )

  const lessonCalc = useMemo(() => {
    if (!isSuccess) {
      return []
    }

    if (!groupByDate) {
      return [{ date: '', data: sorted }]
    }

    const lessonsData = []
    for (let i = 0; i < sorted.length; i++) {
      const element = sorted[i]
      const find = lessonsData.find(
        (item) => dayjs(element.date).diff(dayjs(item.date), 'day') === 0,
      )

      if (find) {
        find.data.push(element)
      } else {
        lessonsData.push({
          date: element.date,
          data: [element],
        })
      }
    }

    return lessonsData.sort((a, b) => (a.date < b.date ? 1 : -1))
  }, [groupByDate, isSuccess, sorted])

  const onSubmit = (lessonData) => {
    toastRef.current = toast({
      title: 'Отправляем',
      status: 'loading',
      duration: 9000,
    })
    createdLessonRef.current = lessonData
    if (editLesson) updateLesson(lessonData)
    else createLesson({ courseId, ...lessonData })
  }

  useEffect(() => {
    if (deletingRqst.isError) {
      toast({
        title: (deletingRqst.error as any)?.error,
        status: 'error',
        duration: 3000,
      })
    }

    if (deletingRqst.isSuccess) {
      const lesson = { ...lessonToDelete }
      toast({
        status: 'warning',
        duration: 9000,
        render: ({ id, ...toastProps }) => (
          <Toast
            {...toastProps}
            id={id}
            title={
              <>
                <Box pb={3}>
                  <Text fontSize="xl">{`Удалена лекция ${lesson.name}`}</Text>
                </Box>
                <Button
                  onClick={() => {
                    createLesson({ courseId, ...lesson })
                    toast.close(id)
                  }}
                >
                  Восстановить
                </Button>
              </>
            }
          />
        ),
      })
      setlessonToDelete(null)
    }
  }, [deletingRqst.isLoading, deletingRqst.isSuccess, deletingRqst.isError])

  useEffect(() => {
    if (crLQuery.isSuccess) {
      const toastProps = {
        title: 'Лекция создана',
        description: `Лекция ${createdLessonRef.current?.name} успешно создана`,
        status: 'success' as const,
        duration: 9000,
        isClosable: true,
      }
      if (toastRef.current) toast.update(toastRef.current, toastProps)
      else toast(toastProps)
      setShowForm(false)
    }
  }, [crLQuery.isSuccess])

  useEffect(() => {
    if (updateLessonRqst.isSuccess) {
      const toastProps = {
        title: 'Лекция Обновлена',
        description: `Лекция ${createdLessonRef.current?.name} успешно обновлена`,
        status: 'success' as const,
        duration: 9000,
        isClosable: true,
      }
      if (toastRef.current) toast.update(toastRef.current, toastProps)
      else toast(toastProps)
      setShowForm(false)
    }
  }, [updateLessonRqst.isSuccess])

  if (isLoading) {
    return <XlSpinner />
  }

  return (
    <>
      <AlertDialog
        isOpen={Boolean(lessonToDelete)}
        leastDestructiveRef={cancelRef}
        onClose={() => setlessonToDelete(null)}
      >
        <AlertDialogOverlay>
          <AlertDialogContent>
            <AlertDialogHeader fontSize="lg" fontWeight="bold">
              Удалить занятие от{' '}
              {dayjs(lessonToDelete?.date).format('DD.MM.YY')}?
            </AlertDialogHeader>

            <AlertDialogBody>
              Все данные о посещении данного занятия будут удалены
            </AlertDialogBody>

            <AlertDialogFooter>
              <Button
                isDisabled={deletingRqst.isLoading}
                ref={cancelRef}
                onClick={() => setlessonToDelete(null)}
              >
                Cancel
              </Button>
              <Button
                colorScheme="red"
                loadingText=""
                isLoading={deletingRqst.isLoading}
                onClick={() => deleteLesson(lessonToDelete.id)}
                ml={3}
              >
                Delete
              </Button>
            </AlertDialogFooter>
          </AlertDialogContent>
        </AlertDialogOverlay>
      </AlertDialog>
      <BreadcrumbsWrapper>
        <Breadcrumb>
          <BreadcrumbItem>
            <BreadcrumbLink as={Link} to={getNavigationsValue('journal.main')}>
              Журнал
            </BreadcrumbLink>
          </BreadcrumbItem>

          <BreadcrumbItem isCurrentPage>
            <BreadcrumbLink href="#">Курс</BreadcrumbLink>
          </BreadcrumbItem>
        </Breadcrumb>
      </BreadcrumbsWrapper>
      <Container maxW="container.xl" position="relative">
        {isTeacher(user) && (
          <Box mt="15" mb="15">
            {showForm ? (
              <LessonForm
                key={editLesson?.id}
                isLoading={crLQuery.isLoading}
                onSubmit={onSubmit}
                onCancel={() => {
                  setShowForm(false)
                  setEditLesson(null)
                }}
                error={(crLQuery.error as any)?.error}
                lesson={editLesson}
                title={editLesson ? 'Редактирование лекции' : 'Создание лекции'}
                nameButton={editLesson ? 'Редактировать' : 'Создать'}
              />
            ) : (
              <Button
                leftIcon={<AddIcon />}
                colorScheme="green"
                onClick={() => setShowForm(true)}
              >
                Добавить
              </Button>
            )}
          </Box>
        )}
        {barFeature && sorted?.length > 1 && (
          <Box height="300">
            <Bar
              data={sorted.map((lesson, index) => ({
                lessonIndex: `#${index + 1}`,
                count: lesson.students.length,
              }))}
            />
          </Box>
        )}
        <TableContainer whiteSpace="wrap" pb={13}>
          <Table variant="striped" colorScheme="cyan">
            <Thead>
              <Tr>
                {isTeacher(user) && (
                  <Th align="center" width={1}>
                    ссылка
                  </Th>
                )}
                <Th textAlign="center" width={1}>
                  {groupByDate ? 'Время' : 'Дата'}
                </Th>
                <Th width="100%">Название</Th>
                {isTeacher(user) && <Th>action</Th>}
                <Th isNumeric>Отмечено</Th>
              </Tr>
            </Thead>
            <Tbody>
              {lessonCalc?.map(({ data: lessons, date }) => (
                <LessonItems
                  courseId={courseId}
                  date={date}
                  isTeacher={isTeacher(user)}
                  lessons={lessons}
                  setlessonToDelete={setlessonToDelete}
                  key={date}
                />
              ))}
            </Tbody>
          </Table>
        </TableContainer>
      </Container>
    </>
  )
}

export default LessonList