"use client";

import { useState, type FormEvent, type ReactNode } from "react";
import Link from "next/link";
import Image from "next/image";
import { Reveal } from "./Reveal";

// Same lock icon + copy as /challenge's and /newsletter's EmailCapture —
// unified across all newsletter-signup forms instead of each having its
// own wording/color for this trust note.
function LockIcon() {
  return (
    <svg width="14" height="14" viewBox="0 0 14 14" fill="none" className="shrink-0">
      <rect x="2" y="6" width="10" height="7" rx="1.5" stroke="#888" strokeWidth="1.3" />
      <path d="M4.5 6V4.5a2.5 2.5 0 0 1 5 0V6" stroke="#888" strokeWidth="1.3" />
    </svg>
  );
}

type NewsletterProps = {
  title?: ReactNode;
  description?: string;
};

/**
 * Reused as-is (same bordered/muted panel + icon-decoration + form
 * pattern) on both Home and /newsletter (the "Impulse & Tipps" page) —
 * their Figma frames use the exact same newsletter-inner component
 * instance, just with different copy, so title/description are props
 * instead of a second near-duplicate component.
 */
export function Newsletter({
  title = <>Starte mit einer Woche voller Klarheit<span className="text-brand">.</span></>,
  description = "Melde dich zum Newsletter an und erhalte die 7-Tage-Challenge, mit der du durch mehr Struktur weniger Stress spürst.",
}: NewsletterProps = {}) {
  const [email, setEmail] = useState("");
  const [consent, setConsent] = useState(false);
  const [status, setStatus] = useState<"idle" | "submitting" | "success" | "error">("idle");
  const [error, setError] = useState("");

  async function handleSubmit(e: FormEvent<HTMLFormElement>) {
    e.preventDefault();
    setStatus("submitting");
    setError("");
    try {
      const res = await fetch("/api/newsletter/subscribe", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ email, consent, source: "newsletter-page" }),
      });
      const data = await res.json();
      if (!data.ok) {
        setError(data.reason || "Anmeldung ist fehlgeschlagen. Bitte versuche es später erneut.");
        setStatus("error");
        return;
      }
      setStatus("success");
    } catch {
      setError("Anmeldung ist fehlgeschlagen. Bitte versuche es später erneut.");
      setStatus("error");
    }
  }

  return (
    <section className="py-16 w-full">

      {/* Outer section padding — same fluid horizontal padding as all other sections */}
      <div className="px-[var(--layout-padding-x)] w-full">

        {/* Rounded card: cream bg, stacks below md */}
        <Reveal className="bg-bg-muted flex flex-col md:flex-row gap-8 md:gap-12 items-center px-8 py-8 md:py-0 rounded-md w-full">

          {/* Left: copy — fixed width from md+ so the form always gets the remaining space */}
          <div className="flex gap-8 items-start w-full md:w-[var(--newsletter-copy-width)] md:py-4 md:shrink-0">

            {/* Decorative envelope icon, tilted -4° as per design */}
            <div className="flex items-center justify-center shrink-0 w-[4.23rem] h-[3.71rem]">
              <div className="-rotate-4 -scale-y-100">
                <Image
                  alt=""
                  src="/newsletter-icon.svg"
                  width={64}
                  height={55}
                  className="w-16 h-[3.438rem] block"
                />
              </div>
            </div>

            {/* Heading + body */}
            <div className="flex flex-col gap-4 flex-1 min-w-0 text-text-primary">
              <p
                className="font-semibold text-h-section leading-normal"
                style={{ fontFamily: "var(--font-lora)" }}
              >
                {title}
              </p>
              <p className="font-normal text-body leading-6">
                {description}
              </p>
            </div>
          </div>

          {/* Right: form — takes remaining space, centered vertically from md+ */}
          <div className="flex w-full md:flex-1 items-center md:self-stretch min-w-0">
            {status === "success" ? (
              <p className="text-body text-text-primary font-medium">
                Danke! Du bist jetzt für den Newsletter angemeldet.
              </p>
            ) : (
              <form onSubmit={handleSubmit} className="flex flex-1 flex-col gap-4 min-w-0 w-full">

                {/* Input + submit button — stacked below md, side by side from md+ */}
                <div className="flex flex-col md:flex-row gap-4 items-stretch w-full">
                  <input
                    type="email"
                    required
                    value={email}
                    onChange={(e) => setEmail(e.target.value)}
                    placeholder="Deine E-Mail-Adresse"
                    className="flex-1 min-w-0 bg-bg-white border border-border rounded-sm px-6 py-3 text-body text-text-muted font-normal outline-none focus:border-brand transition-colors"
                  />
                  <button
                    type="submit"
                    disabled={status === "submitting"}
                    className="shrink-0 bg-brand rounded-sm px-5 py-3 font-bold text-h4 text-text-primary tracking-[0.18px] whitespace-nowrap hover:brightness-95 active:scale-[0.97] transition-all focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand focus-visible:ring-offset-2 focus-visible:ring-offset-bg-muted disabled:opacity-60 disabled:pointer-events-none"
                  >
                    {status === "submitting" ? "Wird gesendet…" : "Jetzt anmelden"}
                  </button>
                </div>

                {/* Consent checkbox — required since this signup's legal
                    basis is consent (email marketing), not the "Ich achte
                    auf deine Daten" trust note alone. Same wording/pattern
                    as NewsletterModal's checkbox. */}
                <label className="flex gap-2 items-start cursor-pointer">
                  <input
                    type="checkbox"
                    required
                    checked={consent}
                    onChange={(e) => setConsent(e.target.checked)}
                    className="size-4 shrink-0 mt-0.5 rounded-xs border border-border accent-brand"
                  />
                  <span className="text-label text-text-primary font-normal leading-normal">
                    Ich akzeptiere die{" "}
                    <Link
                      href="/datenschutz"
                      target="_blank"
                      rel="noopener noreferrer"
                      className="underline hover:text-brand"
                    >
                      Datenschutzerklärung
                    </Link>
                    .
                  </span>
                </label>

                {status === "error" && (
                  <p className="text-label text-red-600 font-normal">{error}</p>
                )}

                {/* Privacy note — same icon/copy/color as the other
                    newsletter forms (see /challenge's EmailCapture). */}
                <p className="flex items-center gap-1.5 text-label text-[#888] font-normal leading-normal">
                  <LockIcon />
                  Keine Werbung. Jederzeit abbestellbar.
                </p>
              </form>
            )}
          </div>

        </Reveal>
      </div>
    </section>
  );
}