"use client";

import { useState } from "react";

type FormState = {
  name: string;
  email: string;
  phone: string;
  subject: string;
  message: string;
};

const initialState: FormState = {
  name: "",
  email: "",
  phone: "",
  subject: "",
  message: "",
};

const subjects = [
  "General enquiry",
  "Admissions",
  "Programs & curriculum",
  "Fees & payments",
  "Partnerships",
  "Other",
];

export default function ContactForm() {
  const [form, setForm] = useState<FormState>(initialState);
  const [submitted, setSubmitted] = useState(false);

  function update<K extends keyof FormState>(key: K, value: FormState[K]) {
    setForm((prev) => ({ ...prev, [key]: value }));
  }

  function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
    e.preventDefault();
    setSubmitted(true);
    setForm(initialState);
  }

  if (submitted) {
    return (
      <div className="rounded-2xl border border-[#e9eefc] bg-white p-6 sm:p-10 md:p-14 text-center">
        <div className="mx-auto flex h-14 w-14 items-center justify-center rounded-full bg-[#1f3fb8]/10">
          <svg
            className="h-7 w-7 text-[#1f3fb8]"
            fill="none"
            viewBox="0 0 24 24"
            stroke="currentColor"
            strokeWidth={2.5}
            aria-hidden="true"
          >
            <path
              strokeLinecap="round"
              strokeLinejoin="round"
              d="M5 13l4 4L19 7"
            />
          </svg>
        </div>
        <h3 className="mt-5 text-2xl font-bold tracking-tight text-[#132b87]">
          Message sent
        </h3>
        <p className="mt-3 text-[#5a688d] leading-relaxed max-w-md mx-auto">
          Thanks for reaching out. Our team will get back to you within 1 - 2
          working days.
        </p>
        <button
          type="button"
          onClick={() => setSubmitted(false)}
          className="mt-7 text-sm font-semibold text-[#1f3fb8] hover:text-[#18339a] transition"
        >
          Send another message →
        </button>
      </div>
    );
  }

  return (
    <form
      onSubmit={handleSubmit}
      className="rounded-2xl border border-[#e9eefc] bg-white p-5 sm:p-6 md:p-10"
      noValidate
    >
      <div className="grid grid-cols-1 sm:grid-cols-2 gap-x-5 gap-y-5">
        <Field label="Full name" required>
          <input
            type="text"
            required
            value={form.name}
            onChange={(e) => update("name", e.target.value)}
            className={inputCls}
            placeholder="Your name"
          />
        </Field>
        <Field label="Email" required>
          <input
            type="email"
            required
            value={form.email}
            onChange={(e) => update("email", e.target.value)}
            className={inputCls}
            placeholder="you@example.com"
          />
        </Field>
        <Field label="Phone">
          <input
            type="tel"
            value={form.phone}
            onChange={(e) => update("phone", e.target.value)}
            className={inputCls}
            placeholder="+254 7XX XXX XXX"
          />
        </Field>
        <Field label="Subject" required>
          <select
            required
            value={form.subject}
            onChange={(e) => update("subject", e.target.value)}
            className={inputCls}
          >
            <option value="">Select a topic</option>
            {subjects.map((s) => (
              <option key={s} value={s}>
                {s}
              </option>
            ))}
          </select>
        </Field>
        <div className="sm:col-span-2">
          <Field label="Message" required>
            <textarea
              required
              value={form.message}
              onChange={(e) => update("message", e.target.value)}
              rows={4}
              className={`${inputCls} resize-y min-h-28`}
              placeholder="How can we help?"
            />
          </Field>
        </div>
      </div>

      <div className="mt-8 flex flex-col-reverse sm:flex-row sm:items-center sm:justify-between gap-4">
        <button
          type="submit"
          className="w-full sm:w-auto inline-flex items-center justify-center gap-2 px-8 py-3 bg-[#1f3fb8] text-white text-sm font-semibold rounded-full hover:bg-[#18339a] transition"
        >
          Send message
          <span aria-hidden="true">→</span>
        </button>
      </div>
    </form>
  );
}

const inputCls =
  "w-full rounded-lg border border-[#e3e8f5] bg-white px-3.5 py-2.5 text-sm text-[#132b87] placeholder:text-[#a5b0cc] focus:outline-none focus:border-[#1f3fb8] focus:ring-2 focus:ring-[#1f3fb8]/15 transition";

function Field({
  label,
  required,
  children,
}: {
  label: string;
  required?: boolean;
  children: React.ReactNode;
}) {
  return (
    <label className="block">
      <span className="block text-xs font-medium text-[#5a688d] mb-1.5">
        {label}
        {required && <span className="text-[#1f3fb8]"> *</span>}
      </span>
      {children}
    </label>
  );
}