import { useState } from 'react'
import { redirectToStripeCheckout } from '../stripe'

interface GoldOption {
  gold_amount: number
  price: string
}

interface Props {
  url: string
  csrfToken: string
  characters: string[]
  options: GoldOption[]
}

export function GoldForm({ url, csrfToken, characters, options }: Props) {
  const [character, setCharacter] = useState('')
  const [amount, setAmount] = useState('')
  const [busy, setBusy] = useState(false)
  const [message, setMessage] = useState<{ ok: boolean; html: string } | null>(null)

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault()
    if (busy) return
    setBusy(true)
    setMessage(null)

    const body = new URLSearchParams()
    body.set('character', character)
    body.set('gold_amount', amount)
    body.set('csrfmiddlewaretoken', csrfToken)

    try {
      const resp = await fetch(url, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/x-www-form-urlencoded',
          'X-CSRFToken': csrfToken,
          Accept: 'application/json',
        },
        credentials: 'same-origin',
        body: body.toString(),
      })
      if (!resp.ok) throw new Error(`HTTP ${resp.status}`)
      const data: { success?: boolean; message?: string; session_id?: string; stripe_public_key?: string } =
        await resp.json()
      if (data.success && data.session_id && data.stripe_public_key) {
        await redirectToStripeCheckout(data.stripe_public_key, data.session_id)
        return
      }
      setMessage({ ok: !!data.success, html: data.message || '' })
      setBusy(false)
    } catch {
      setMessage({ ok: false, html: '<span class="red-form-response">Error al iniciar el pago. Inténtalo más tarde.</span>' })
      setBusy(false)
    }
  }

  return (
    <div className="centered">
      <form onSubmit={handleSubmit} acceptCharset="utf-8">
        <select name="character" value={character} onChange={(e) => setCharacter(e.target.value)} required>
          <option value="" disabled>Seleccione un personaje</option>
          {characters.map((c) => (
            <option value={c} key={c}>{c}</option>
          ))}
        </select>
        <br />
        <select name="gold_amount" value={amount} onChange={(e) => setAmount(e.target.value)} required>
          <option value="" disabled>Seleccione cantidad de oro</option>
          {options.map((o) => (
            <option value={o.gold_amount} key={o.gold_amount}>
              {o.gold_amount} oro - {o.price} EUR
            </option>
          ))}
        </select>
        <br />
        <button type="submit" className="gold-button" disabled={busy || !character || !amount}>
          {busy ? 'Procesando…' : 'Enviar oro'}
        </button>
      </form>
      <hr />
      <center>
        <div className="alert-message" style={{ display: message ? 'block' : 'none' }}>
          {message && <span dangerouslySetInnerHTML={{ __html: message.html }} />}
        </div>
      </center>
    </div>
  )
}
