import { useState } from "react";
import { cn } from "@/lib/utils";
import { Typography } from "@/components/Typography";

export type EmailProvider = "none" | "mailchimp" | "klaviyo";

export type NewsletterCtaProps = {
  tagline: string;
  heading: string;
  subheading: string;
  buttonLabel: string;
  emailProvider: EmailProvider;
  endpoint?: string;
  mailchimpApiKey?: string;
  mailchimpServerPrefix?: string;
  mailchimpAudienceId?: string;
  klaviyoCompanyId?: string;
  klaviyoListId?: string;
  imageUrl: string;
  layout: "split" | "stacked";
};

export function NewsletterCta({
  tagline,
  heading,
  subheading,
  buttonLabel,
  emailProvider,
  endpoint,
  mailchimpApiKey,
  mailchimpServerPrefix,
  mailchimpAudienceId,
  klaviyoCompanyId,
  klaviyoListId,
  imageUrl,
  layout,
}: NewsletterCtaProps) {
  const [email, setEmail] = useState("");
  const [submitted, setSubmitted] = useState(false);
  const [submitting, setSubmitting] = useState(false);

  const submit = async (e: React.FormEvent) => {
    e.preventDefault();
    if (!email) return;
    setSubmitting(true);
    try {
      if (emailProvider === "mailchimp") {
        if (mailchimpServerPrefix && mailchimpAudienceId && mailchimpApiKey) {
          await fetch(
            `https://${mailchimpServerPrefix}.api.mailchimp.com/3.0/lists/${mailchimpAudienceId}/members`,
            {
              method: "POST",
              headers: {
                "Content-Type": "application/json",
                Authorization: `Bearer ${mailchimpApiKey}`,
              },
              body: JSON.stringify({
                email_address: email,
                status: "subscribed",
              }),
            },
          );
        }
      } else if (emailProvider === "klaviyo") {
        if (klaviyoCompanyId && klaviyoListId) {
          await fetch(
            `https://a.klaviyo.com/client/subscriptions/?company_id=${klaviyoCompanyId}`,
            {
              method: "POST",
              headers: {
                "Content-Type": "application/json",
                revision: "2024-10-15",
              },
              body: JSON.stringify({
                data: {
                  type: "subscription",
                  attributes: {
                    profile: {
                      data: {
                        type: "profile",
                        attributes: { email },
                      },
                    },
                  },
                  relationships: {
                    list: { data: { type: "list", id: klaviyoListId } },
                  },
                },
              }),
            },
          );
        }
      } else if (endpoint) {
        await fetch(endpoint, {
          method: "POST",
          headers: { "Content-Type": "application/json" },
          body: JSON.stringify({ email }),
        });
      }
      setSubmitted(true);
    } catch {
      setSubmitted(true);
    } finally {
      setSubmitting(false);
    }
  };

  const Form = (
    <form
      onSubmit={submit}
      className="flex w-full max-w-md items-center border-b border-foreground/30 focus-within:border-foreground"
    >
      <input
        type="email"
        required
        value={email}
        onChange={(e) => setEmail(e.target.value)}
        placeholder="you@example.com"
        className="flex-1 bg-transparent py-3 text-sm placeholder:text-muted-foreground focus:outline-none"
      />
      <button
        type="submit"
        disabled={submitting}
        className="ml-3 text-sm font-medium tracking-wide hover:opacity-70 disabled:opacity-40"
      >
        {submitting ? "…" : buttonLabel} →
      </button>
    </form>
  );

  if (layout === "split") {
    return (
      <section className="bg-background">
        <div className="container mx-auto max-w-7xl px-6 py-16 md:py-24">
          <div className="grid grid-cols-1 items-center gap-12 md:grid-cols-2">
            <div>
              {imageUrl ? (
                <img
                  src={imageUrl}
                  alt=""
                  className="aspect-[5/4] w-full rounded-md object-cover"
                />
              ) : null}
            </div>
            <div className="flex flex-col items-start">
              {tagline ? (
                <p className="mb-3 text-xs uppercase tracking-[0.2em] text-muted-foreground">
                  {tagline}
                </p>
              ) : null}
              <Typography variant="h2">{heading}</Typography>
              {subheading ? (
                <Typography variant="subtitle1" className="mt-3 max-w-md">
                  {subheading}
                </Typography>
              ) : null}
              <div className="mt-8 w-full">
                {submitted ? (
                  <p className="text-sm text-muted-foreground">
                    Thanks — we'll be in touch.
                  </p>
                ) : (
                  Form
                )}
              </div>
            </div>
          </div>
        </div>
      </section>
    );
  }

  return (
    <section className="bg-muted/40 py-20 md:py-28">
      <div className="container mx-auto max-w-2xl px-6 text-center">
        {tagline ? (
          <p className="mb-3 text-xs uppercase tracking-[0.2em] text-muted-foreground">
            {tagline}
          </p>
        ) : null}
        <Typography variant="h2">{heading}</Typography>
        {subheading ? (
          <Typography variant="subtitle1" className="mt-3">
            {subheading}
          </Typography>
        ) : null}
        <div className={cn("mx-auto mt-10 flex w-full max-w-md justify-center")}>
          {submitted ? (
            <p className="text-sm text-muted-foreground">
              Thanks — we'll be in touch.
            </p>
          ) : (
            Form
          )}
        </div>
      </div>
    </section>
  );
}