import React, { useState, useEffect } from 'react'
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogDescription,
  DialogFooter,
} from '@/components/ui/dialog'
import { Button } from '@/components/ui/button'
import { Ic } from '@/icons'
import type { FactorItem } from '../types'
import { BillingStatusBadge } from './BillingStatusBadge'
import { resolveMediaUrl, getMediaFallbackUrl, toFa } from '@/lib/utils'

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

export function ReceiptLightboxDialog({
  factor,
  open,
  onClose,
  onClearReceipt,
}: Props) {
  const [zoom, setZoom] = useState<number>(1)
  const [rotation, setRotation] = useState<number>(0)
  const [imageError, setImageError] = useState(false)
  const [imageLoading, setImageLoading] = useState(true)
  const [imgSrc, setImgSrc] = useState<string>('')
  const [fallbackTried, setFallbackTried] = useState(false)

  useEffect(() => {
    if (open && factor) {
      setZoom(1)
      setRotation(0)
      setImageError(false)
      setImageLoading(true)
      setFallbackTried(false)
      setImgSrc(resolveMediaUrl(factor.transaction_receipt))
    }
  }, [open, factor?.id, factor?.transaction_receipt])

  if (!factor) return null

  const receiptUrl = imgSrc || resolveMediaUrl(factor.transaction_receipt)
  const hasReceipt = Boolean(receiptUrl)

  const handleZoomIn = () => setZoom((prev) => Math.min(4, +(prev + 0.25).toFixed(2)))
  const handleZoomOut = () => setZoom((prev) => Math.max(0.5, +(prev - 0.25).toFixed(2)))
  const handleReset = () => {
    setZoom(1)
    setRotation(0)
  }
  const handleRotate = () => setRotation((prev) => (prev + 90) % 360)

  const handleToggleZoom = () => {
    setZoom((prev) => (prev > 1 ? 1 : 2))
  }

  return (
    <Dialog open={open} onOpenChange={(val) => !val && onClose()}>
      <DialogContent className="max-w-3xl sm:max-w-4xl max-h-[92vh] overflow-hidden p-0 border border-border/60 bg-background/95 backdrop-blur-md flex flex-col">
        {/* هدر مدال پیش‌نمایش فیش */}
        <DialogHeader className="p-4 px-5 border-b border-border/40 flex flex-row items-center justify-between shrink-0 bg-background/95">
          <div className="flex items-center gap-2.5">
            <div className="size-9 rounded-xl bg-primary/15 text-primary flex items-center justify-center font-bold shrink-0">
              <Ic name="receipt" className="size-4.5" />
            </div>
            <div>
              <DialogTitle className="text-base font-bold flex items-center gap-2">
                <span>تصویر فیش پرداختی صورت‌حساب #{factor.id}</span>
              </DialogTitle>
              <DialogDescription className="text-xs text-muted-foreground mt-0.5">
                مشتری: {factor.user_info?.fullname || factor.user_info?.email || 'نامشخص'} • مبلغ:{' '}
                <span className="font-mono font-bold text-foreground">
                  ${Number(factor.amount).toLocaleString()}
                </span>
              </DialogDescription>
            </div>
          </div>

          <div className="flex items-center gap-2 pl-6">
            <BillingStatusBadge status={factor.status} />
          </div>
        </DialogHeader>

        {/* نوار ابزار بزرگنمایی و کنترل تصویر */}
        {hasReceipt && !imageError && (
          <div className="px-5 py-2 border-b border-border-soft bg-muted/40 flex items-center justify-between text-xs shrink-0">
            <div className="flex items-center gap-1.5">
              <Button
                variant="outline"
                size="sm"
                className="h-7.5 px-2.5 rounded-lg text-xs gap-1 border-border-soft bg-card shadow-2xs hover:bg-muted/60"
                onClick={handleZoomIn}
                title="بزرگنمایی (+)"
              >
                <Ic name="plus" className="size-3.5" />
                <span>بزرگ‌نمایی</span>
              </Button>

              <Button
                variant="outline"
                size="sm"
                className="h-7.5 px-2.5 rounded-lg text-xs gap-1 border-border-soft bg-card shadow-2xs hover:bg-muted/60"
                onClick={handleZoomOut}
                disabled={zoom <= 0.5}
                title="کوچک‌نمایی (-)"
              >
                <span className="font-bold text-base leading-none">−</span>
                <span>کوچک‌نمایی</span>
              </Button>

              <Button
                variant="outline"
                size="sm"
                className="h-7.5 px-2.5 rounded-lg text-xs gap-1 border-border-soft bg-card shadow-2xs hover:bg-muted/60"
                onClick={handleRotate}
                title="چرخش 90 درجه"
              >
                <Ic name="refresh" className="size-3.5" />
                <span>چرخش</span>
              </Button>

              {(zoom !== 1 || rotation !== 0) && (
                <Button
                  variant="ghost"
                  size="sm"
                  className="h-7.5 px-2 rounded-lg text-xs text-muted-foreground hover:text-foreground"
                  onClick={handleReset}
                  title="بازنشانی اندازه"
                >
                  <span>اندازه اولیه (100%)</span>
                </Button>
              )}

              <span className="text-[11px] font-mono text-muted-foreground ms-1">
                {toFa(Math.round(zoom * 100))}%
              </span>
            </div>

            <div className="flex items-center gap-1.5">
              <a
                href={receiptUrl}
                target="_blank"
                rel="noopener noreferrer"
                className="inline-flex items-center gap-1.5 h-7.5 px-3 rounded-lg text-xs font-medium border border-border-soft bg-card hover:bg-muted/60 text-foreground transition-colors shadow-2xs"
                title="مشاهده فایل اصلی در تب جدید"
              >
                <Ic name="external" className="size-3.5" />
                <span>اندازه اصلی</span>
              </a>
            </div>
          </div>
        )}

        {/* کادر نمایش تصویر فیش */}
        <div className="relative flex-1 min-h-[380px] max-h-[62vh] overflow-auto p-4 flex items-center justify-center bg-slate-950/20 dark:bg-black/40">
          {hasReceipt && !imageError ? (
            <div className="relative flex items-center justify-center min-w-full min-h-full">
              {imageLoading && (
                <div className="absolute inset-0 flex flex-col items-center justify-center text-muted-foreground gap-2">
                  <span className="size-6 border-2 border-primary border-t-transparent rounded-full animate-spin" />
                  <span className="text-xs font-medium">در حال بارگذاری تصویر فیش...</span>
                </div>
              )}

              <img
                src={receiptUrl}
                alt={`فیش پرداختی فاکتور #${factor.id}`}
                className={`rounded-xl object-contain shadow-lg border border-border/40 transition-transform duration-150 select-none max-h-[56vh] max-w-full ${
                  zoom > 1 ? 'cursor-zoom-out' : 'cursor-zoom-in'
                }`}
                style={{
                  transform: `scale(${zoom}) rotate(${rotation}deg)`,
                  transformOrigin: 'center center',
                }}
                onDoubleClick={handleToggleZoom}
                title={zoom > 1 ? 'دوبار کلیک برای بازنشانی اندازه' : 'دوبار کلیک برای بزرگ‌نمایی'}
                onLoad={() => setImageLoading(false)}
                onError={() => {
                  if (!fallbackTried && factor.transaction_receipt) {
                    setFallbackTried(true)
                    const fallback = getMediaFallbackUrl(factor.transaction_receipt)
                    if (fallback && imgSrc !== fallback) {
                      setImgSrc(fallback)
                      return
                    }
                  }
                  setImageLoading(false)
                  setImageError(true)
                }}
              />
            </div>
          ) : (
            <div className="flex flex-col items-center justify-center text-center p-8 text-muted-foreground">
              <div className="size-14 rounded-full bg-amber-500/10 flex items-center justify-center text-amber-500 mb-3">
                <Ic name="alert" className="size-7" />
              </div>
              <p className="font-bold text-sm text-foreground">
                {imageError
                  ? 'خطا در بارگذاری تصویر فیش پرداختی.'
                  : 'هنوز فیش واریزی برای این صورت‌حساب ثبت نشده است.'}
              </p>
              <p className="text-xs mt-1 text-muted-foreground">
                {imageError
                  ? 'آدرس فایل در سرور در دسترس نیست یا فرمت تصویر نامعتبر می‌باشد.'
                  : 'وضعیت فاکتور در انتظار پرداخت توسط مشتری می‌باشد.'}
              </p>
              {imageError && onClearReceipt && (
                <Button
                  variant="outline"
                  size="sm"
                  onClick={async () => {
                    await onClearReceipt(factor.id)
                    onClose()
                  }}
                  className="mt-4 rounded-xl h-8 px-4 text-xs font-semibold border-destructive/40 text-destructive hover:bg-destructive/10 gap-1.5 shadow-2xs"
                >
                  <Ic name="trash" className="size-3.5" />
                  <span>پاکسازی و حذف فیش نامعتبر</span>
                </Button>
              )}
            </div>
          )}
        </div>

        {/* اطلاعات شماره کارت و توضیحات جانبی */}
        {factor.card_number && (
          <div className="px-5 py-2.5 border-t border-border-soft bg-card/50 flex items-center justify-between text-xs shrink-0">
            <span className="text-muted-foreground">شماره کارت مقصد:</span>
            <span className="font-mono font-bold tracking-wider dir-ltr text-foreground">
              {factor.card_number}
            </span>
          </div>
        )}

        {/* فوتر مودال: دکمه بستن و دکمه حذف فیش (در صورت وجود) */}
        <DialogFooter className="p-4 px-5 border-t border-border-soft bg-card/80 flex flex-row items-center justify-between w-full shrink-0">
          <div>
            {onClearReceipt && factor.transaction_receipt && (
              <Button
                variant="outline"
                size="sm"
                onClick={async () => {
                  await onClearReceipt(factor.id)
                  onClose()
                }}
                className="rounded-xl h-9 px-3.5 text-xs font-semibold border-destructive/30 text-destructive hover:bg-destructive/10 gap-1.5"
              >
                <Ic name="trash" className="size-3.5" />
                <span>حذف فیش</span>
              </Button>
            )}
          </div>
          <Button
            variant="outline"
            size="sm"
            onClick={onClose}
            className="rounded-xl h-9 px-6 text-xs font-bold border-border-soft hover:bg-muted/50"
          >
            بستن
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  )
}