import { useState, type FormEvent, type ReactNode } from "react";
import { submitEnquiry, type EnquiryResult } from "@/data/enquiry";

/**
 * Editorial form used in two places:
 *   variant="contact"  — the Contact Us page
 *   variant="bespoke"  — bulk gifting / bespoke gifting enquiries
 */

const CONTACT_TOPICS = [
  "General enquiry",
  "My order",
  "Feedback",
  "Press & collaborations",
];

const BESPOKE_TYPES = [
  "Corporate & bulk gifting",
  "Weddings & celebrations",
  "Brand collaboration",
  "Events & experiences",
  "Custom packaging",
];

const BUDGETS = [
  "Under ₹25,000",
  "₹25,000 – ₹1,00,000",
  "₹1,00,000 – ₹5,00,000",
  "Above ₹5,00,000",
];

const inputClass =
  "mt-2 w-full border-b border-ink-900/20 bg-transparent pb-3 pt-1 text-[1.05rem] font-light text-ink-900 outline-none transition-colors duration-300 placeholder:text-ink-500/40 focus:border-orange-500";

function Field({
  label,
  error,
  children,
  className = "",
}: {
  label: string;
  error?: string;
  children: ReactNode;
  className?: string;
}) {
  return (
    <label className={`block ${className}`}>
      <span className="eyebrow text-[0.62rem]! text-ink-500">{label}</span>
      {children}
      {error && <span className="mt-2 block text-[0.8rem] text-orange-600">{error}</span>}
    </label>
  );
}

export default function ContactForm({ variant }: { variant: "contact" | "bespoke" }) {
  const bespoke = variant === "bespoke";
  const [pending, setPending] = useState(false);
  const [errors, setErrors] = useState<Record<string, string>>({});
  const [done, setDone] = useState(false);

  async function onSubmit(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();
    const form = event.currentTarget;
    const f = new FormData(form);
    const get = (k: string) => String(f.get(k) ?? "").trim();

    setPending(true);
    setErrors({});
    let result: EnquiryResult;
    try {
      result = await submitEnquiry({
        data: {
          form: variant,
          name: get("name"),
          email: get("email"),
          phone: get("phone"),
          company: get("company"),
          topic: bespoke ? undefined : get("topic"),
          enquiryType: bespoke ? get("enquiryType") : undefined,
          quantity: get("quantity"),
          budget: get("budget"),
          date: get("date"),
          message: get("message"),
          website: get("website"),
        },
      });
    } catch {
      result = { ok: false, errors: { form: "Something went wrong — please try again, or call the atelier." } };
    }
    setPending(false);

    if (result.ok) {
      form.reset();
      setDone(true);
    } else {
      setErrors(result.errors);
    }
  }

  if (done) {
    return (
      <div className="border border-ink-900/10 bg-ivory-100 px-7 py-14 text-center sm:px-12">
        <p className="font-script text-[2.6rem] leading-none text-orange-500">Thank you</p>
        <p className="mx-auto mt-6 max-w-sm text-[0.98rem] leading-relaxed text-ink-500">
          Your {bespoke ? "enquiry" : "note"} has reached the atelier — we reply
          within one working day.
        </p>
        <button
          type="button"
          onClick={() => setDone(false)}
          className="link-quiet eyebrow mt-8 text-ink-700 hover:text-orange-500"
        >
          Send another
        </button>
      </div>
    );
  }

  return (
    <form onSubmit={onSubmit} noValidate={false}>
      {/* honeypot — hidden from real users */}
      <input
        type="text"
        name="website"
        tabIndex={-1}
        autoComplete="off"
        aria-hidden="true"
        className="hidden"
      />

      <div className="grid gap-x-8 gap-y-8 sm:grid-cols-2">
        <Field label="Your name *" error={errors.name}>
          <input
            type="text"
            name="name"
            required
            minLength={2}
            maxLength={120}
            autoComplete="name"
            placeholder="Full name"
            className={inputClass}
          />
        </Field>
        <Field label="Email *" error={errors.email}>
          <input
            type="email"
            name="email"
            required
            maxLength={200}
            autoComplete="email"
            placeholder="you@example.com"
            className={inputClass}
          />
        </Field>
        <Field label="Phone" error={errors.phone}>
          <input
            type="tel"
            name="phone"
            maxLength={20}
            autoComplete="tel"
            placeholder={bespoke ? "Best number to reach you" : "Optional"}
            className={inputClass}
          />
        </Field>
        {bespoke ? (
          <Field label="Company / brand">
            <input
              type="text"
              name="company"
              maxLength={160}
              autoComplete="organization"
              placeholder="Optional"
              className={inputClass}
            />
          </Field>
        ) : (
          <Field label="What is this about?">
            <select name="topic" defaultValue={CONTACT_TOPICS[0]} className={`${inputClass} cursor-pointer`}>
              {CONTACT_TOPICS.map((t) => (
                <option key={t} value={t}>
                  {t}
                </option>
              ))}
            </select>
          </Field>
        )}
      </div>

      {bespoke && (
        <div className="mt-8 grid gap-x-8 gap-y-8 sm:grid-cols-2">
          <Field label="Enquiry type">
            <select name="enquiryType" defaultValue={BESPOKE_TYPES[0]} className={`${inputClass} cursor-pointer`}>
              {BESPOKE_TYPES.map((t) => (
                <option key={t} value={t}>
                  {t}
                </option>
              ))}
            </select>
          </Field>
          <Field label="Approximate quantity">
            <input
              type="text"
              name="quantity"
              maxLength={60}
              placeholder="e.g. 150 boxes"
              className={inputClass}
            />
          </Field>
          <Field label="Budget per gift">
            <select name="budget" defaultValue="" className={`${inputClass} cursor-pointer`}>
              <option value="" disabled>
                Select a range
              </option>
              {BUDGETS.map((b) => (
                <option key={b} value={b}>
                  {b}
                </option>
              ))}
            </select>
          </Field>
          <Field label="Date needed">
            <input type="date" name="date" className={`${inputClass} cursor-pointer`} />
          </Field>
        </div>
      )}

      <div className="mt-8">
        <Field label={bespoke ? "Tell us about the occasion *" : "Your message *"} error={errors.message}>
          <textarea
            name="message"
            required
            minLength={10}
            maxLength={4000}
            rows={bespoke ? 5 : 4}
            placeholder={
              bespoke
                ? "The occasion, who it's for, and the feeling you want it to leave behind."
                : "How can we help?"
            }
            className={`${inputClass} resize-y`}
          />
        </Field>
      </div>

      {errors.form && <p className="mt-6 text-[0.85rem] text-orange-600">{errors.form}</p>}

      <div className="mt-10 flex flex-wrap items-center gap-6">
        <button type="submit" disabled={pending} className="btn btn-dark disabled:opacity-60">
          {pending ? "Sending…" : bespoke ? "Send enquiry" : "Send message"}
        </button>
        <p className="text-[0.8rem] leading-relaxed text-ink-500">
          We reply within one working day.
        </p>
      </div>
    </form>
  );
}