'use client'

import { Button, toast, useDocumentInfo, useField } from '@payloadcms/ui'
import React, { useMemo, useState } from 'react'

type InquiryReplyLogEntry = {
  message?: null | string
  sentAt?: null | string
  sentBy?: null | string
  subject?: null | string
}

const purposeLabelMap: Record<string, string> = {
  retail: 'Retail',
  proyek: 'Proyek',
  lainnya: 'Lainnya',
}

const statusLabelMap: Record<string, string> = {
  baru: 'Baru',
  diproses: 'Diproses',
  dibalas: 'Dibalas',
  selesai: 'Selesai',
  spam: 'Spam',
}

const cardClassName = 'rounded-lg border border-border bg-card px-5 py-4'
const labelClassName = 'mb-1 text-xs font-semibold uppercase tracking-wide text-muted-foreground'
const valueClassName = 'text-sm leading-6 text-foreground'

export const InquiryConsoleField: React.FC = () => {
  const { id } = useDocumentInfo()

  const inquiryNameField = useField<string>({ path: 'inquiryName' })
  const inquiryEmailField = useField<string>({ path: 'inquiryEmail' })
  const inquiryPhoneField = useField<string>({ path: 'inquiryPhone' })
  const inquiryPurposeField = useField<string>({ path: 'inquiryPurpose' })
  const inquiryMessageField = useField<string>({ path: 'inquiryMessage' })
  const statusField = useField<string>({ path: 'status' })
  const repliedAtField = useField<string>({ path: 'repliedAt' })
  const replyLogField = useField<InquiryReplyLogEntry[]>({ path: 'replyLog' })

  const [subject, setSubject] = useState('')
  const [message, setMessage] = useState('')
  const [isSending, setIsSending] = useState(false)

  const purposeLabel = useMemo(() => {
    const currentPurpose = inquiryPurposeField.value
    return currentPurpose ? purposeLabelMap[currentPurpose] || currentPurpose : '-'
  }, [inquiryPurposeField.value])

  const statusLabel = useMemo(() => {
    const currentStatus = statusField.value
    return currentStatus ? statusLabelMap[currentStatus] || currentStatus : '-'
  }, [statusField.value])

  const replyHistory = Array.isArray(replyLogField.value) ? replyLogField.value : []

  const sendReply = async () => {
    if (!id) {
      toast.error('Inquiry belum memiliki ID dokumen yang valid.')
      return
    }

    const trimmedSubject = subject.trim()
    const trimmedMessage = message.trim()

    if (!trimmedSubject) {
      toast.error('Subjek balasan wajib diisi.')
      return
    }

    if (!trimmedMessage) {
      toast.error('Pesan balasan wajib diisi.')
      return
    }

    setIsSending(true)

    try {
      const response = await fetch(`/api/form-submissions/${id}/reply`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          message: trimmedMessage,
          subject: trimmedSubject,
        }),
      })

      const json = await response.json().catch(() => ({}))

      if (!response.ok) {
        const messageFromServer =
          json?.errors?.[0]?.message || json?.message || 'Gagal mengirim balasan inquiry.'

        toast.error(messageFromServer)
        return
      }

      const nextDoc = json?.doc || {}

      statusField.setValue(nextDoc.status || 'dibalas')
      repliedAtField.setValue(nextDoc.repliedAt || new Date().toISOString())
      replyLogField.setValue(Array.isArray(nextDoc.replyLog) ? nextDoc.replyLog : replyHistory)
      setSubject('')
      setMessage('')
      toast.success('Balasan inquiry berhasil dikirim.')
    } catch (_error) {
      toast.error('Terjadi masalah saat mengirim balasan inquiry.')
    } finally {
      setIsSending(false)
    }
  }

  return (
    <div className="space-y-5">
      <div className={cardClassName}>
        <div className="mb-4 flex flex-wrap items-center justify-between gap-3">
          <div>
            <h3 className="text-lg font-semibold leading-tight text-foreground">Ringkasan Inquiry</h3>
            <p className="text-sm text-muted-foreground">
              Detail utama pesan ditampilkan di sini agar admin tidak perlu membaca payload mentah.
            </p>
          </div>

          <div className="inline-flex items-center rounded-full border border-border px-3 py-1 text-xs font-semibold uppercase tracking-wide text-foreground">
            {statusLabel}
          </div>
        </div>

        <div className="grid gap-4 md:grid-cols-2">
          <div>
            <p className={labelClassName}>Nama</p>
            <p className={valueClassName}>{inquiryNameField.value || '-'}</p>
          </div>
          <div>
            <p className={labelClassName}>Email</p>
            <p className={valueClassName}>{inquiryEmailField.value || '-'}</p>
          </div>
          <div>
            <p className={labelClassName}>Telepon / WhatsApp</p>
            <p className={valueClassName}>{inquiryPhoneField.value || '-'}</p>
          </div>
          <div>
            <p className={labelClassName}>Tujuan</p>
            <p className={valueClassName}>{purposeLabel}</p>
          </div>
          <div className="md:col-span-2">
            <p className={labelClassName}>Pesan</p>
            <p className={`${valueClassName} whitespace-pre-wrap`}>
              {inquiryMessageField.value || '-'}
            </p>
          </div>
          <div className="md:col-span-2">
            <p className={labelClassName}>Balasan Terakhir</p>
            <p className={valueClassName}>
              {repliedAtField.value
                ? new Date(repliedAtField.value).toLocaleString('id-ID', {
                    dateStyle: 'medium',
                    timeStyle: 'short',
                  })
                : 'Belum ada balasan yang dikirim.'}
            </p>
          </div>
        </div>
      </div>

      <div className={cardClassName}>
        <div className="mb-4">
          <h3 className="text-lg font-semibold leading-tight text-foreground">Kirim Balasan</h3>
          <p className="text-sm text-muted-foreground">
            Balasan akan dikirim ke alamat email visitor yang tersimpan pada inquiry ini.
          </p>
        </div>

        <div className="space-y-4">
          <div>
            <label className={labelClassName} htmlFor="inquiry-reply-subject">
              Subjek
            </label>
            <input
              className="w-full rounded-md border border-border bg-background px-3 py-2 text-sm"
              id="inquiry-reply-subject"
              onChange={(event) => setSubject(event.target.value)}
              placeholder="Contoh: Tindak lanjut untuk pertanyaan Anda"
              value={subject}
            />
          </div>

          <div>
            <label className={labelClassName} htmlFor="inquiry-reply-message">
              Pesan Balasan
            </label>
            <textarea
              className="min-h-40 w-full rounded-md border border-border bg-background px-3 py-2 text-sm leading-6"
              id="inquiry-reply-message"
              onChange={(event) => setMessage(event.target.value)}
              placeholder="Tulis balasan yang akan dikirim ke visitor di sini."
              value={message}
            />
          </div>

          <div className="flex flex-wrap items-center gap-3">
            <Button buttonStyle="primary" disabled={isSending || !inquiryEmailField.value} onClick={sendReply}>
              {isSending ? 'Mengirim...' : 'Kirim Balasan'}
            </Button>

            {!inquiryEmailField.value ? (
              <p className="text-sm text-destructive">
                Inquiry ini belum memiliki email tujuan sehingga balasan tidak bisa dikirim.
              </p>
            ) : null}
          </div>
        </div>
      </div>

      <div className={cardClassName}>
        <div className="mb-4">
          <h3 className="text-lg font-semibold leading-tight text-foreground">Riwayat Balasan</h3>
          <p className="text-sm text-muted-foreground">
            Audit ringan untuk balasan yang sudah dikirim dari dashboard.
          </p>
        </div>

        {replyHistory.length ? (
          <div className="space-y-4">
            {replyHistory
              .slice()
              .reverse()
              .map((entry, index) => (
                <div className="rounded-md border border-border/80 bg-muted/30 px-4 py-3" key={`${entry.sentAt}-${index}`}>
                  <div className="mb-2 flex flex-wrap items-center justify-between gap-2">
                    <p className="text-sm font-semibold text-foreground">{entry.subject || 'Tanpa subjek'}</p>
                    <p className="text-xs text-muted-foreground">
                      {(entry.sentAt &&
                        new Date(entry.sentAt).toLocaleString('id-ID', {
                          dateStyle: 'medium',
                          timeStyle: 'short',
                        })) ||
                        '-'}
                    </p>
                  </div>

                  <p className="mb-2 text-xs font-medium uppercase tracking-wide text-muted-foreground">
                    {entry.sentBy || 'Administrator'}
                  </p>
                  <p className="whitespace-pre-wrap text-sm leading-6 text-foreground">
                    {entry.message || '-'}
                  </p>
                </div>
              ))}
          </div>
        ) : (
          <p className="text-sm text-muted-foreground">Belum ada balasan yang tercatat untuk inquiry ini.</p>
        )}
      </div>
    </div>
  )
}