import React, { useState } from 'react'
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogDescription,
  DialogFooter,
} from '@/components/ui/dialog'
import { Button } from '@/components/ui/button'
import { Avatar } from '@/components/ui/avatar'
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
import { Ic } from '@/icons'
import type { FactorItem } from '../types'
import { BillingStatusBadge } from './BillingStatusBadge'
import { BillingServiceBadge } from './BillingServiceBadge'

interface Props {
  factor: FactorItem | null
  open: boolean
  onClose: () => void
  onApprove: (factorId: number) => Promise<void>
  onOpenRejectDialog: (factor: FactorItem) => void
  onOpenReceiptLightbox: (factor: FactorItem) => void
  onClearReceipt?: (factorId: number) => Promise<void>
  isUpdating?: boolean
}

export function BillingDetailModal({
  factor,
  open,
  onClose,
  onApprove,
  onOpenRejectDialog,
  onOpenReceiptLightbox,
  onClearReceipt,
  isUpdating,
}: Props) {
  const [copiedCard, setCopiedCard] = useState(false)

  if (!factor) return null

  const handleCopyCard = (cardNumber: string) => {
    navigator.clipboard.writeText(cardNumber)
    setCopiedCard(true)
    setTimeout(() => setCopiedCard(false), 2000)
  }

  const detail = factor.detail_service
  const user = factor.user_info

  return (
    <Dialog open={open} onOpenChange={(val) => !val && onClose()}>
      <DialogContent className="max-w-3xl max-h-[90vh] overflow-y-auto border border-border/60 bg-background/95 backdrop-blur-md p-0">
        {/* هدر مودال */}
        <DialogHeader className="p-5 border-b border-border/40 sticky top-0 bg-background/95 backdrop-blur-sm z-10">
          <div className="flex flex-wrap items-center justify-between gap-3">
            <div className="flex items-center gap-2.5">
              <div className="size-10 rounded-xl bg-primary/15 text-primary flex items-center justify-center font-bold">
                <Ic name="receipt" className="size-5" />
              </div>
              <div>
                <DialogTitle className="text-lg font-bold flex items-center gap-2">
                  <span>صورت‌حساب شماره #{factor.id}</span>
                </DialogTitle>
                <DialogDescription className="text-xs text-muted-foreground mt-0.5">
                  ثبت شده در: {new Date(factor.created_at).toLocaleString('fa-IR')}
                </DialogDescription>
              </div>
            </div>

            <div className="flex items-center gap-2">
              <BillingServiceBadge service={factor.service} />
              <BillingStatusBadge status={factor.status} />
            </div>
          </div>
        </DialogHeader>

        <div className="p-5 space-y-5">
          {/* کارت وضعیت انقضا یا هشدار رد */}
          {factor.status === 'rejected' && factor.rejected_description && (
            <div className="bg-rose-500/10 border border-rose-500/20 rounded-xl p-4 flex items-start gap-3 text-rose-700 dark:text-rose-300">
              <Ic name="xCircle" className="size-5 shrink-0 mt-0.5 text-rose-500" />
              <div>
                <h4 className="font-bold text-xs mb-1">دلیل رد صورت‌حساب:</h4>
                <p className="text-xs leading-relaxed">{factor.rejected_description}</p>
              </div>
            </div>
          )}

          {factor.status === 'expired' && (
            <div className="bg-slate-500/10 border border-slate-500/20 rounded-xl p-4 flex items-start gap-3 text-slate-700 dark:text-slate-300">
              <Ic name="clock" className="size-5 shrink-0 mt-0.5 text-slate-500" />
              <div>
                <h4 className="font-bold text-xs mb-1">دلیل انقضا:</h4>
                <p className="text-xs leading-relaxed">{factor.rejected_description || 'انقضای مهلت پرداخت (سپری شدن ۷۲ ساعت)'}</p>
              </div>
            </div>
          )}

          {factor.expiration_date && (
            <div className="bg-muted/40 border border-border/40 rounded-xl p-3 flex items-center justify-between text-xs">
              <span className="text-muted-foreground flex items-center gap-1.5">
                <Ic name="clock" className="size-4 text-amber-500" />
                <span>مهلت پرداخت (تاریخ انقضا):</span>
              </span>
              <span className="font-semibold">{factor.expiration_date}</span>
            </div>
          )}

          {/* اطلاعات خریدار و اطلاعات مالی در ۲ ستون */}
          <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
            {/* کارت مشخصات خریدار */}
            <Card className="border-border/50 shadow-xs">
              <CardHeader className="py-3 px-4 border-b border-border/40">
                <CardTitle className="text-xs font-bold text-muted-foreground flex items-center gap-2">
                  <Ic name="users" className="size-4 text-primary" />
                  <span>اطلاعات مشتری</span>
                </CardTitle>
              </CardHeader>
              <CardContent className="p-4 space-y-3">
                <div className="flex items-center gap-3">
                  <Avatar
                    className="size-11 border border-border/40 text-xs font-bold"
                    src={user?.avatar || undefined}
                    letter={user?.fullname ? user.fullname.slice(0, 2) : 'ک'}
                  />
                  <div className="min-w-0">
                    <p className="font-bold text-sm truncate text-foreground">
                      {user?.fullname || 'نام ثبت نشده'}
                    </p>
                    <p className="text-xs text-muted-foreground truncate">{user?.email || '—'}</p>
                  </div>
                </div>

                <div className="pt-2 border-t border-border/40 space-y-1.5 text-xs">
                  <div className="flex justify-between">
                    <span className="text-muted-foreground">شماره تماس:</span>
                    <span className="font-mono dir-ltr font-medium text-foreground">
                      {user?.phone_number || '—'}
                    </span>
                  </div>
                  <div className="flex justify-between">
                    <span className="text-muted-foreground">شناسه کاربری:</span>
                    <span className="font-mono font-medium">{user?.id ?? '—'}</span>
                  </div>
                </div>
              </CardContent>
            </Card>

            {/* کارت مشخصات مالی فاکتور */}
            <Card className="border-border/50 shadow-xs">
              <CardHeader className="py-3 px-4 border-b border-border/40">
                <CardTitle className="text-xs font-bold text-muted-foreground flex items-center gap-2">
                  <Ic name="creditCard" className="size-4 text-primary" />
                  <span>مشخصات مالی و واریز</span>
                </CardTitle>
              </CardHeader>
              <CardContent className="p-4 space-y-3">
                <div className="flex items-center justify-between">
                  <span className="text-xs text-muted-foreground">مبلغ کل فاکتور:</span>
                  <span className="text-lg font-black text-primary">
                    {Number(factor.amount).toLocaleString()} $
                  </span>
                </div>

                {factor.card_number && (
                  <div className="bg-muted/40 p-2.5 rounded-lg border border-border/40 flex items-center justify-between text-xs">
                    <div className="flex flex-col">
                      <span className="text-[10px] text-muted-foreground">شماره کارت مقصد:</span>
                      <span className="font-mono font-bold tracking-wider dir-ltr text-foreground">
                        {factor.card_number}
                      </span>
                    </div>
                    <Button
                      variant="ghost"
                      size="icon"
                      className="size-7 text-muted-foreground hover:text-foreground"
                      onClick={() => handleCopyCard(factor.card_number!)}
                      title="کپی شماره کارت"
                    >
                      <Ic name={copiedCard ? 'check' : 'clipboardCheck'} className="size-3.5" />
                    </Button>
                  </div>
                )}

                <div className="pt-2 border-t border-border/40 space-y-1 text-xs">
                  <div className="flex justify-between">
                    <span className="text-muted-foreground">شناسه سفارش مرجع:</span>
                    <span className="font-mono font-medium">
                      {factor.order_id || factor.object_id}
                    </span>
                  </div>
                  {factor.description && (
                    <div className="flex justify-between gap-2">
                      <span className="text-muted-foreground shrink-0">توضیحات:</span>
                      <span className="text-foreground text-end truncate">{factor.description}</span>
                    </div>
                  )}
                </div>
              </CardContent>
            </Card>
          </div>

          {/* جزئیات سرویس چندشکلی (Polymorphic Details) */}
          <Card className="border-border/50 shadow-xs">
            <CardHeader className="py-3 px-4 border-b border-border/40 bg-muted/20">
              <CardTitle className="text-xs font-bold flex items-center gap-2">
                <Ic name="list" className="size-4 text-primary" />
                <span>ریز اقلام و مشخصات سرویس ({factor.service.toUpperCase()})</span>
              </CardTitle>
            </CardHeader>
            <CardContent className="p-4 text-xs space-y-4">
              {/* ۱. تور */}
              {factor.service === 'tour' && (
                <div className="space-y-3">
                  <div className="flex items-center justify-between pb-2 border-b border-border/40">
                    <span className="text-muted-foreground">عنوان تور:</span>
                    <span className="font-bold text-sm text-foreground">{detail?.tour || '—'}</span>
                  </div>

                  {detail?.passenger_data ? (
                    <div className="space-y-3">
                      <p className="font-bold text-xs text-muted-foreground">اسامی و رده سنی مسافران:</p>
                      
                      {/* بزرگسالان */}
                      {(detail.passenger_data.adults?.count ?? 0) > 0 && (
                        <div className="bg-muted/30 p-2.5 rounded-lg border border-border/30">
                          <span className="font-bold text-purple-600 dark:text-purple-400">
                            بزرگسال ({detail.passenger_data.adults?.count} نفر):
                          </span>
                          <span className="ms-2 text-foreground">
                            {detail.passenger_data.adults?.names.join('، ')}
                          </span>
                        </div>
                      )}

                      {/* کودکان */}
                      {(detail.passenger_data.children?.count ?? 0) > 0 && (
                        <div className="bg-muted/30 p-2.5 rounded-lg border border-border/30">
                          <span className="font-bold text-blue-600 dark:text-blue-400">
                            کودک ({detail.passenger_data.children?.count} نفر):
                          </span>
                          <span className="ms-2 text-foreground">
                            {detail.passenger_data.children?.names.join('، ')}
                          </span>
                        </div>
                      )}

                      {/* نوزادان */}
                      {(detail.passenger_data.infants?.count ?? 0) > 0 && (
                        <div className="bg-muted/30 p-2.5 rounded-lg border border-border/30">
                          <span className="font-bold text-pink-600 dark:text-pink-400">
                            نوزاد ({detail.passenger_data.infants?.count} نفر):
                          </span>
                          <span className="ms-2 text-foreground">
                            {detail.passenger_data.infants?.names.join('، ')}
                          </span>
                        </div>
                      )}
                    </div>
                  ) : (
                    <p className="text-muted-foreground">اطلاعات مسافران ثبت نشده است.</p>
                  )}
                </div>
              )}

              {/* ۲. سیم‌کارت */}
              {factor.service === 'simcard' && (
                <div className="space-y-3">
                  <div className="divide-y divide-border/40">
                    {detail?.items?.map((item, idx) => (
                      <div key={idx} className="py-2 flex items-center justify-between">
                        <div>
                          <span className="font-medium text-foreground">
                            {item.simcard_title || `سیم‌کارت کد ${item.simcard_id}`}
                          </span>
                          <span className="ms-2 text-muted-foreground">
                            (تعداد: {item.quantity})
                          </span>
                        </div>
                        <span className="font-bold font-mono">
                          {Number(item.cost).toLocaleString()} $
                        </span>
                      </div>
                    ))}
                  </div>
                  {detail?.total_cost && (
                    <div className="flex justify-between pt-2 border-t border-border/40 font-bold">
                      <span>هزینه کل اقلام:</span>
                      <span className="text-primary font-mono">{detail.total_cost} $</span>
                    </div>
                  )}
                </div>
              )}

              {/* ۳. فروشگاه */}
              {factor.service === 'shop' && (
                <div className="space-y-3">
                  <div className="divide-y divide-border/40">
                    {detail?.items?.map((item, idx) => (
                      <div key={idx} className="py-2 flex items-center justify-between">
                        <div>
                          <span className="font-medium text-foreground">
                            محصول {item.product_slug || `#${item.product_id}`}
                          </span>
                          <span className="ms-2 text-muted-foreground">
                            ({item.quantity} عدد × {item.price} $)
                          </span>
                        </div>
                        <span className="font-bold font-mono">
                          {Number(item.cost).toLocaleString()} $
                        </span>
                      </div>
                    ))}
                  </div>
                  {detail?.total_cost && (
                    <div className="flex justify-between pt-2 border-t border-border/40 font-bold">
                      <span>جمع اقلام سبد خرید:</span>
                      <span className="text-primary font-mono">{detail.total_cost} $</span>
                    </div>
                  )}
                </div>
              )}

              {/* ۴. صرافی / تسریف */}
              {factor.service === 'tasrif' && (
                <div className="space-y-2 bg-muted/30 p-3 rounded-lg border border-border/40">
                  <div className="flex justify-between">
                    <span className="text-muted-foreground">تبدیل ارز:</span>
                    <span className="font-bold text-foreground">
                      از {detail?.from_currency} به {detail?.to_currency}
                    </span>
                  </div>
                  <div className="flex justify-between">
                    <span className="text-muted-foreground">مبلغ درخواستی:</span>
                    <span className="font-mono font-medium">{detail?.amount}</span>
                  </div>
                  <div className="flex justify-between pt-2 border-t border-border/40 font-bold">
                    <span>مبلغ نهایی معادل:</span>
                    <span className="text-emerald-600 dark:text-emerald-400 font-mono text-sm">
                      {detail?.total_price} $
                    </span>
                  </div>
                </div>
              )}

              {/* ۵. سفر اختصاصی (Custom Trip) */}
              {factor.service === 'custom_trip' && (
                <div className="space-y-3">
                  {detail?.destinations && detail.destinations.length > 0 && (
                    <div>
                      <span className="text-muted-foreground block mb-1">مسیر سفر:</span>
                      <div className="flex flex-wrap gap-2">
                        {detail.destinations.map((d, i) => (
                          <span
                            key={i}
                            className="bg-primary/10 text-primary px-2.5 py-1 rounded-md text-xs font-semibold"
                          >
                            {d}
                          </span>
                        ))}
                      </div>
                    </div>
                  )}
                  {detail?.detail && (
                    <div className="bg-muted/30 p-3 rounded-lg border border-border/40">
                      <span className="text-muted-foreground block mb-1">خلاصه برنامه سفر:</span>
                      <p className="text-xs leading-relaxed text-foreground whitespace-pre-wrap">
                        {typeof detail.detail === 'string' ? detail.detail : JSON.stringify(detail.detail)}
                      </p>
                    </div>
                  )}
                </div>
              )}
            </CardContent>
          </Card>

          {/* تصویر فیش واریزی */}
          <Card className="border-border/50 shadow-xs">
            <CardHeader className="py-3 px-4 border-b border-border/40 flex flex-row items-center justify-between">
              <CardTitle className="text-xs font-bold flex items-center gap-2">
                <Ic name="image" className="size-4 text-primary" />
                <span>فیش واریزی و رسید بانکی</span>
              </CardTitle>
              {factor.transaction_receipt && onClearReceipt && (
                <Button
                  variant="ghost"
                  size="sm"
                  className="h-7 text-xs text-muted-foreground hover:text-destructive"
                  onClick={() => onClearReceipt(factor.id)}
                  disabled={isUpdating}
                >
                  <Ic name="trash" className="size-3.5 me-1" />
                  <span>حذف فیش</span>
                </Button>
              )}
            </CardHeader>
            <CardContent className="p-4">
              {factor.transaction_receipt ? (
                <div className="flex flex-col sm:flex-row items-center gap-4 bg-muted/20 p-3 rounded-xl border border-border/40">
                  <div
                    onClick={() => onOpenReceiptLightbox(factor)}
                    className="relative cursor-pointer group overflow-hidden rounded-lg border border-border/40 size-32 shrink-0 bg-black/5"
                  >
                    <img
                      src={factor.transaction_receipt}
                      alt="فیش پرداختی"
                      className="size-full object-cover group-hover:scale-105 transition-transform"
                    />
                    <div className="absolute inset-0 bg-black/40 opacity-0 group-hover:opacity-100 flex items-center justify-center text-white transition-opacity text-xs font-medium">
                      <Ic name="eye" className="size-5" />
                    </div>
                  </div>

                  <div className="space-y-2 text-xs flex-1">
                    <p className="font-bold text-foreground">فیش بانکی توسط مشتری آپلود شده است.</p>
                    <p className="text-muted-foreground text-[11px]">
                      جهت بررسی صحت اطلاعات و انطباق با واریز حساب، می‌توانید تصویر فیش را در سایز
                      کامل باز کرده و سپس وضعیت صورت‌حساب را تایید یا رد نمایید.
                    </p>
                    <Button
                      variant="outline"
                      size="sm"
                      className="h-8 gap-1 text-xs"
                      onClick={() => onOpenReceiptLightbox(factor)}
                    >
                      <Ic name="eye" className="size-3.5" />
                      <span>مشاهده در اندازه بزرگ</span>
                    </Button>
                  </div>
                </div>
              ) : (
                <div className="flex items-center gap-3 p-4 bg-amber-500/10 rounded-xl border border-amber-500/20 text-amber-700 dark:text-amber-300">
                  <Ic name="alert" className="size-5 text-amber-500 shrink-0" />
                  <p className="text-xs">
                    هنوز تصویر فیش واریزی توسط مشتری در سامانه بارگذاری نشده است.
                  </p>
                </div>
              )}
            </CardContent>
          </Card>
        </div>

        {/* فوتر مودال و دکمه‌های عملیاتی ادمین */}
        <DialogFooter className="p-4 border-t border-border/40 bg-muted/20 sticky bottom-0 z-10 flex items-center justify-between sm:justify-between w-full">
          <Button variant="outline" size="sm" onClick={onClose}>
            بستن
          </Button>

          <div className="flex items-center gap-2">
            {factor.status !== 'approved' && (
              <Button
                variant="default"
                size="sm"
                className="bg-emerald-600 hover:bg-emerald-700 text-white gap-1.5"
                disabled={isUpdating}
                onClick={() => onApprove(factor.id)}
              >
                <Ic name="checkCircle" className="size-4" />
                <span>تایید پرداخت و فاکتور</span>
              </Button>
            )}

            {factor.status !== 'rejected' && (
              <Button
                variant="destructive"
                size="sm"
                className="gap-1.5"
                disabled={isUpdating}
                onClick={() => onOpenRejectDialog(factor)}
              >
                <Ic name="xCircle" className="size-4" />
                <span>رد صورت‌حساب</span>
              </Button>
            )}
          </div>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  )
}