import type { Route } from './+types'

import { flatten } from 'flat'
import {
  CalendarIcon,
  ChevronDownIcon,
  DownloadIcon,
  FileSpreadsheetIcon,
  FileTextIcon,
  PlusCircleIcon,
  PlusIcon
} from 'lucide-react'
import { MeiliSearchFilterBuilder } from 'meilisearch-helper'
import { Suspense, useState } from 'react'
import { Await, Link, useParams, useSearchParams } from 'react-router'
import type { BookType } from 'xlsx'
import * as XLSX from 'xlsx'

import { DataTable, DataTableViewOptions } from '@/components/data-table'
import { RangeCalendarFilter } from '@/components/range-calendar-filter'

import { FacetedFilter } from '@repo/ui/components/faceted-filter'
import { SearchForm } from '@repo/ui/components/search-form'
import { Skeleton } from '@repo/ui/components/skeleton'
import { Button } from '@repo/ui/components/ui/button'
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuGroup,
  DropdownMenuItem,
  DropdownMenuTrigger
} from '@repo/ui/components/ui/dropdown-menu'
import { Kbd } from '@repo/ui/components/ui/kbd'
import { createSearch } from '@repo/util/meili'
import { columns, type Enrollment } from './columns'
import { headers, sortings, statuses } from './data'

export function meta({}: Route.MetaArgs) {
  return [{ title: 'Matrículas' }]
}

export async function loader({ params, context, request }: Route.LoaderArgs) {
  const { searchParams } = new URL(request.url)
  const { orgid } = params
  const query = searchParams.get('q') || ''
  const from = searchParams.get('from')
  const to = searchParams.get('to')
  const sort = searchParams.get('sort') || 'created_at:desc'
  const status = searchParams.get('status')
  const page = Number(searchParams.get('p')) + 1
  const hitsPerPage = Number(searchParams.get('perPage')) || 25

  let builder = new MeiliSearchFilterBuilder().where('org_id', '=', orgid)

  if (status) {
    builder = builder.where('status', 'in', status.split(','))
  }

  if (from && to) {
    const [field, from_] = from.split(':')
    builder = builder.where(field, 'between', [from_, to])
  }

  return {
    data: createSearch({
      index: 'betaeducacao-prod-enrollments',
      filter: builder.build(),
      sort: [sort],
      query,
      page,
      hitsPerPage,
      env: context.cloudflare.env
    })
  }
}

const formatted = new Intl.DateTimeFormat('en-CA', {
  year: 'numeric',
  month: '2-digit',
  day: '2-digit'
})

export default function Route({ loaderData: { data } }) {
  const [searchParams, setSearchParams] = useSearchParams()
  const [selectedRows, setSelectedRows] = useState<Enrollment[]>([])
  const status = searchParams.get('status')
  const rangeParams = useRangeParams()

  return (
    <Suspense fallback={<Skeleton />}>
      <div className="space-y-0.5 mb-8">
        <h1 className="text-2xl font-bold tracking-tight">
          Gerenciar matrículas
        </h1>
        <p className="text-muted-foreground">
          Matricule colaboradores de forma rápida e acompanhe seu progresso.
        </p>
      </div>

      <Await resolve={data}>
        {({ hits, page, hitsPerPage, totalHits }) => (
          <DataTable
            sort={[{ id: 'created_at', desc: true }]}
            columns={columns}
            data={hits as Enrollment[]}
            pageIndex={page - 1}
            pageSize={hitsPerPage}
            setSelectedRows={setSelectedRows}
            rowCount={totalHits}
            hiddenColumn={[
              'completed_at',
              'started_at',
              'failed_at',
              'canceled_at'
            ]}
          >
            <div className="flex gap-2.5 mb-2.5">
              {selectedRows.length ? (
                <>
                  <div className="flex gap-2.5 items-center">
                    <ExportMenu headers={headers} selectedRows={selectedRows} />
                  </div>
                </>
              ) : (
                <>
                  <div className="w-full 2xl:w-1/3">
                    <SearchForm
                      defaultValue={searchParams.get('q') || ''}
                      placeholder={
                        <>
                          Digite <Kbd className="border font-mono">/</Kbd> para
                          pesquisar
                        </>
                      }
                      onChange={(value) =>
                        setSearchParams((searchParams) => {
                          searchParams.set('q', String(value))
                          searchParams.delete('p')
                          return searchParams
                        })
                      }
                    />
                  </div>

                  <div className="flex gap-2.5 max-lg:flex-col w-full">
                    <div className="flex gap-2.5 max-lg:flex-col">
                      <FacetedFilter
                        title="Status"
                        icon={PlusCircleIcon}
                        className="lg:flex-1"
                        value={status ? status.split(',') : []}
                        onChange={(statuses) => {
                          setSearchParams((searchParams) => {
                            searchParams.delete('status')
                            searchParams.delete('p')

                            if (statuses.length) {
                              searchParams.set('status', statuses.join(','))
                            }

                            return searchParams
                          })
                        }}
                        options={Object.entries(statuses).map(
                          ([key, value]) => ({
                            value: key,
                            ...value
                          })
                        )}
                      />

                      <RangeCalendarFilter
                        title="Período"
                        icon={CalendarIcon}
                        value={rangeParams}
                        className="lg:flex-1"
                        options={Object.entries(sortings).map(
                          ([value, label]) => ({
                            value,
                            label
                          })
                        )}
                        onChange={(props) => {
                          setSearchParams((searchParams) => {
                            if (!props) {
                              searchParams.delete('from')
                              searchParams.delete('to')
                              return searchParams
                            }

                            const { rangeField, dateRange } = props

                            searchParams.set(
                              'from',
                              `${rangeField}:${formatted.format(dateRange?.from)}`
                            )
                            searchParams.set(
                              'to',
                              formatted.format(dateRange?.to)
                            )

                            return searchParams
                          })
                        }}
                      />
                    </div>

                    <div className="lg:ml-auto flex gap-2.5">
                      <DataTableViewOptions className="flex-1" />

                      <Button className="flex-1" asChild>
                        <Link to="add">
                          <PlusIcon /> Adicionar
                        </Link>
                      </Button>
                    </div>
                  </div>
                </>
              )}
            </div>
          </DataTable>
        )}
      </Await>
    </Suspense>
  )
}

function useRangeParams() {
  const [searchParams] = useSearchParams()
  const [from, to] = [searchParams.get('from'), searchParams.get('to')]

  if (!from || !to) {
    return {}
  }

  const [rangeField, from_] = from.split(':')

  return {
    rangeField,
    dateRange: {
      from: new Date(from_),
      to: new Date(to)
    }
  }
}

export function ExportMenu({
  headers,
  selectedRows = []
}: {
  headers: Record<string, string>
  selectedRows: object[]
}) {
  const { orgid } = useParams()

  const exportFile = (bookType: BookType) => () => {
    if (!selectedRows.length) {
      return
    }
    const now = new Date()
    const header = Object.keys(headers)
    const data = selectedRows.map((data) => {
      const obj: Record<string, string> = flatten(data)
      return Object.fromEntries(header.map((k) => [k, obj?.[k]]))
    })
    const workbook = XLSX.utils.book_new()
    const worksheet = XLSX.utils.json_to_sheet(data, { header })

    XLSX.utils.sheet_add_aoa(worksheet, [Object.values(headers)], {
      origin: 'A1'
    })
    XLSX.utils.book_append_sheet(workbook, worksheet, 'Sheet1')
    XLSX.writeFile(workbook, `${orgid}_users_${+now}.${bookType}`, {
      bookType,
      compression: true
    })
  }

  return (
    <DropdownMenu>
      <DropdownMenuTrigger asChild>
        <Button variant="outline" className="cursor-pointer">
          <DownloadIcon /> Baixar <ChevronDownIcon />
        </Button>
      </DropdownMenuTrigger>
      <DropdownMenuContent className="w-52" align="start">
        <DropdownMenuGroup className="*:cursor-pointer">
          <DropdownMenuItem onClick={exportFile('xlsx')}>
            <FileSpreadsheetIcon /> Microsoft Excel (.xlsx)
          </DropdownMenuItem>
          <DropdownMenuItem onClick={exportFile('csv')}>
            <FileTextIcon /> CSV (.csv)
          </DropdownMenuItem>
        </DropdownMenuGroup>
      </DropdownMenuContent>
    </DropdownMenu>
  )
}