import { useState } from 'react'
import { useMutation } from '@tanstack/react-query'
import type { ConnectPaymentResult, PaymentProvider } from '@gruperly/shared'
import {
  ArrowLeft,
  ArrowRight,
  BadgeCheck,
  Check,
  CheckCircle2,
  CreditCard,
  Loader2,
  ShieldCheck,
} from 'lucide-react'
import { connectPayment } from '../../lib/api'
import { cn } from '../../lib/utils'
import { Badge, Button } from '../../components/ui'
import { PAYMENT_PROVIDERS } from './constants'

type PaymentStepProps = {
  initialResult: ConnectPaymentResult | null
  onConnected: (result: ConnectPaymentResult) => void
  onBack: () => void
}

export function PaymentStep({ initialResult, onConnected, onBack }: PaymentStepProps) {
  const [selected, setSelected] = useState<PaymentProvider>('MERCADO_PAGO')
  const [connected, setConnected] = useState<ConnectPaymentResult | null>(initialResult)

  const connect = useMutation({
    mutationFn: () => connectPayment({ provider: selected, sandbox: true }),
    onSuccess: (result) => {
      setConnected(result)
      onConnected(result)
    },
  })

  if (connected) {
    return (
      <section className="space-y-6">
        <header className="space-y-1">
          <h2 className="text-2xl font-bold text-primary">Tu cobro está conectado</h2>
          <p className="text-sm text-foreground/60">
            Ya podés dejar listo tu primer grupo para cobrar con{' '}
            {PAYMENT_PROVIDERS.find((p) => p.value === connected.provider)?.name ?? ''}.
          </p>
        </header>

        <div className="rounded-xl border border-success/30 bg-success-soft p-5 text-center">
          <span className="mx-auto flex size-12 items-center justify-center rounded-full bg-surface">
            <CheckCircle2 className="size-6 text-success" />
          </span>
          <p className="mt-3 text-sm font-semibold text-success">Cuenta conectada</p>
          <div className="mt-1 flex items-center justify-center gap-2">
            <span className="text-sm font-medium text-primary">
              {PAYMENT_PROVIDERS.find((p) => p.value === connected.provider)?.name}
            </span>
            <Badge variant="success">Modo prueba</Badge>
          </div>
        </div>

        <div className="flex items-center gap-3">
          <Button variant="outline" onClick={() => setConnected(null)}>
            <ArrowLeft className="size-4" />
            Cambiar
          </Button>
          <Button
            variant="primary"
            className="flex-1"
            onClick={() => onConnected(connected)}
          >
            Continuar
            <ArrowRight className="size-4" />
          </Button>
        </div>
      </section>
    )
  }

  return (
    <section className="space-y-5">
      <header className="space-y-1">
        <h2 className="text-2xl font-bold text-primary">Elegí tu procesador de cobro</h2>
        <p className="text-sm text-foreground/60">
          Los pagos de tus miembros van a llegar por esta plataforma.
        </p>
      </header>

      <div role="radiogroup" aria-label="Procesador de pago" className="space-y-3">
        {PAYMENT_PROVIDERS.map((provider) => {
          const isSelected = selected === provider.value
          return (
            <button
              key={provider.value}
              type="button"
              role="radio"
              aria-checked={isSelected}
              onClick={() => setSelected(provider.value)}
              className={cn(
                'flex w-full items-center gap-3 rounded-xl border bg-surface p-4 text-left transition-colors',
                isSelected
                  ? 'border-accent ring-2 ring-accent/20'
                  : 'border-border hover:bg-primary-soft',
              )}
            >
              <span
                className={cn(
                  'rounded-lg p-2',
                  isSelected ? 'bg-accent-soft' : 'bg-primary-soft',
                )}
              >
                <CreditCard
                  className={cn('size-5', isSelected ? 'text-accent' : 'text-primary/40')}
                />
              </span>
              <span className="min-w-0 flex-1">
                <span className="block text-sm font-semibold text-primary">
                  {provider.name}
                </span>
                <span className="block text-xs text-foreground/60">
                  {provider.description}
                </span>
              </span>
              <span
                className={cn(
                  'flex size-5 shrink-0 items-center justify-center rounded-full border transition-colors',
                  isSelected ? 'border-accent bg-accent text-on-accent' : 'border-border',
                )}
              >
                {isSelected ? <Check className="size-3" strokeWidth={3} /> : null}
              </span>
            </button>
          )
        })}
      </div>

      <div className="flex items-start gap-2 rounded-xl bg-warning-soft px-4 py-3">
        <ShieldCheck className="mt-0.5 size-4 shrink-0 text-warning" />
        <p className="text-xs text-warning">
          Por ahora la conexión se hace en modo prueba (sandbox). Más adelante vas a poder
          vincular tu cuenta real de {selected === 'STRIPE' ? 'Stripe' : 'Mercado Pago'}.
        </p>
      </div>

      {connect.isError ? (
        <p className="rounded-xl bg-danger-soft px-4 py-3 text-sm text-danger">
          No pudimos conectar la cuenta. Intentalo de nuevo.
        </p>
      ) : null}

      <div className="flex items-center gap-3">
        <Button variant="outline" onClick={onBack}>
          <ArrowLeft className="size-4" />
          Volver
        </Button>
        <Button
          variant="primary"
          className="flex-1"
          disabled={connect.isPending}
          onClick={() => connect.mutate()}
        >
          {connect.isPending ? (
            <Loader2 className="size-4 animate-spin" />
          ) : (
            <BadgeCheck className="size-4" />
          )}
          {connect.isPending ? 'Conectando…' : 'Conectar cuenta'}
        </Button>
      </div>
    </section>
  )
}