'use client'

import { useState } from 'react'
import Link from 'next/link'
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
import { useTranslation } from 'react-i18next'
import { Plus } from 'lucide-react'
import { toast } from 'sonner'
import { api, type PaginatedResponse, type MeasurementBook } from '@/lib/api'
import { DataTable } from '@/components/DataTable'
import { Button } from '@/components/ui/Button'
import { Badge } from '@/components/ui/Badge'
import { Select } from '@/components/ui/Select'

const statusVariant = (status: string) => {
  if (status === 'approved') return 'success'
  if (status === 'rejected') return 'danger'
  if (status === 'draft') return 'muted'
  return 'warning'
}

export function MbListPage() {
  const { t } = useTranslation()
  const queryClient = useQueryClient()
  const [search, setSearch] = useState('')
  const [status, setStatus] = useState('')
  const [page, setPage] = useState(1)

  const { data, isLoading } = useQuery({
    queryKey: ['measurement-books', search, status, page],
    queryFn: () =>
      api.get<PaginatedResponse<MeasurementBook>>('/measurement-books', {
        params: { search: search || undefined, status: status || undefined, page, per_page: 25 },
      }),
  })

  const remove = useMutation({
    mutationFn: (id: number) => api.delete(`/measurement-books/${id}`),
    onSuccess: () => {
      toast.success(t('mb.messages.deleted'))
      queryClient.invalidateQueries({ queryKey: ['measurement-books'] })
    },
    onError: () => toast.error(t('common.somethingWentWrong')),
  })

  const rows = data?.data.data ?? []
  const meta = data?.data.meta

  return (
    <div className="space-y-5">
      <div className="animate-fade-in-up flex flex-wrap items-center justify-between gap-3">
        <h1 className="premium-heading text-2xl font-bold" data-tour="page-heading">{t('mb.title')}</h1>
        <Link href="/measurement-books/new">
          <Button size="sm">
            <Plus size={14} />
            {t('mb.create')}
          </Button>
        </Link>
      </div>

      <div className="animate-fade-in-up stagger-1">
        <DataTable
          data={rows}
          loading={isLoading}
          emptyMessage={t('common.noResults')}
          onSearch={(q) => {
            setSearch(q)
            setPage(1)
          }}
          searchValue={search}
          searchPlaceholder={t('mb.search')}
          toolbar={
            <Select
              value={status}
              onChange={(e) => {
                setStatus(e.target.value)
                setPage(1)
              }}
              options={[
                { value: '', label: t('common.allStatuses') },
                ...(['draft', 'submitted', 'verified', 'approved', 'rejected'] as const).map(
                  (value) => ({ value, label: t(`mb.status.${value}`) }),
                ),
              ]}
            />
          }
          pagination={meta}
          onPageChange={setPage}
          columns={[
            { key: 'mb_number', header: t('common.code'), className: 'font-mono text-xs' },
            {
              key: 'contract',
              header: t('mb.contract'),
              render: (r) => r.contract?.contract_number || '—',
            },
            { key: 'site', header: t('mb.site'), render: (r) => r.site?.name || '—' },
            {
              key: 'status',
              header: t('common.status'),
              render: (r) => (
                <Badge variant={statusVariant(r.status)}>
                  {t(`mb.status.${r.status}`, r.status)}
                </Badge>
              ),
            },
            {
              key: 'period',
              header: t('mb.period'),
              render: (r) =>
                r.period_start || r.period_end
                  ? `${r.period_start?.slice(0, 10) ?? '—'} → ${r.period_end?.slice(0, 10) ?? '—'}`
                  : '—',
            },
            {
              key: 'actions',
              header: t('common.actions'),
              className: 'text-right',
              render: (r) => (
                <div className="flex justify-end gap-2">
                  <Link
                    href={`/measurement-books/${r.id}/edit`}
                    className="rounded-lg px-2 py-1 text-xs font-semibold text-accent-600 hover:bg-[var(--premium-hover-bg)]"
                  >
                    {t('common.edit')}
                  </Link>
                  {r.status === 'draft' && (
                    <button
                      type="button"
                      onClick={() => {
                        if (window.confirm(t('common.confirmDelete'))) remove.mutate(r.id)
                      }}
                      className="rounded-lg px-2 py-1 text-xs font-semibold text-red-500 hover:bg-red-500/10"
                    >
                      {t('common.delete')}
                    </button>
                  )}
                </div>
              ),
            },
          ]}
        />
      </div>
    </div>
  )
}