"use client";

import Link from "next/link";
import { useEffect, useMemo, useState } from "react";
import BlogPanel from "@/components/catalog/BlogPanel";
import PortfoliosPanel from "@/components/catalog/PortfoliosPanel";
import ProductsPanel from "@/components/catalog/ProductsPanel";
import { toPlainText } from "@/components/catalog/utils";
import { openBusinessDashboardAsAdmin } from "@/lib/session-handoff";
import { getMarketplaceBusiness } from "@/services/marketplace";
import {
  getBusinessProfile,
  getMeshkeeBusiness,
  type BusinessAddress,
  type BusinessPhoneNumber,
} from "@/services/meshkee-businesses";
import {
  listMeshkeeBlogs,
  listMeshkeePortfolios,
  listMeshkeeProducts,
} from "@/services/meshkee-content";
import styles from "./BusinessDetailsPage.module.css";

type TabId = "products" | "contact" | "blog" | "portfolios";

const TAB_LABELS: Record<TabId, string> = {
  products: "Products",
  contact: "Contact info",
  blog: "Blog",
  portfolios: "Portfolios",
};

const SOCIAL_ICONS: Record<string, string> = {
  instagram: "/images/icons/instagram.png",
  telegram: "/images/icons/telegram.png",
  facebook: "/images/icons/facebook.png",
  whatsapp: "/images/icons/telegram.png",
  linkedin: "/images/icons/facebook.png",
  youtube: "/images/icons/facebook.png",
  aparat: "/images/icons/facebook.png",
};

function hasContactData(input: {
  addresses: BusinessAddress[];
  phones: BusinessPhoneNumber[];
  emails: string[];
  socials: { network: string; handle: string }[];
}) {
  return (
    input.addresses.some(
      (item) =>
        item.address.trim() ||
        item.city.trim() ||
        item.province.trim() ||
        (item.landline ?? "").trim(),
    ) ||
    input.phones.some((item) => item.number.trim()) ||
    input.emails.some((item) => item.trim()) ||
    input.socials.length > 0
  );
}

export default function BusinessDetailsPage({
  listingId,
}: {
  listingId: string;
}) {
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState("");
  const [meshkeeId, setMeshkeeId] = useState("");
  const [tab, setTab] = useState<TabId>("products");

  const [name, setName] = useState("");
  const [slug, setSlug] = useState("");
  const [categoryName, setCategoryName] = useState("");
  const [logoUrl, setLogoUrl] = useState<string | null>(null);
  const [bannerUrl, setBannerUrl] = useState<string | null>(null);
  const [about, setAbout] = useState("");
  const [vision, setVision] = useState("");
  const [sinceMonth, setSinceMonth] = useState("");
  const [sinceYear, setSinceYear] = useState("");
  const [province, setProvince] = useState("");
  const [telephone, setTelephone] = useState("");

  const [productTotal, setProductTotal] = useState(0);
  const [blogTotal, setBlogTotal] = useState(0);
  const [portfolioTotal, setPortfolioTotal] = useState(0);

  const [addresses, setAddresses] = useState<BusinessAddress[]>([]);
  const [phones, setPhones] = useState<BusinessPhoneNumber[]>([]);
  const [emails, setEmails] = useState<string[]>([]);
  const [socials, setSocials] = useState<
    { network: string; handle: string; icon: string }[]
  >([]);

  useEffect(() => {
    let cancelled = false;

    void (async () => {
      setLoading(true);
      setError("");
      try {
        const listing = await getMarketplaceBusiness(listingId);
        const id = String(listing.meshkeeBusinessId);

        const [
          meshkee,
          profile,
          productsRes,
          blogsRes,
          portfoliosRes,
        ] = await Promise.all([
          getMeshkeeBusiness(id),
          getBusinessProfile(id),
          listMeshkeeProducts(id, { page: 1, pageSize: 1 }).catch(() => ({
            total: 0,
          })),
          listMeshkeeBlogs(id, { page: 1, pageSize: 1 }).catch(() => ({
            total: 0,
          })),
          listMeshkeePortfolios(id, { page: 1, pageSize: 1 }).catch(() => ({
            total: 0,
          })),
        ]);

        if (cancelled) return;

        const nextAddresses = profile.addresses ?? [];
        const nextPhones = profile.profile.phoneNumbers ?? [];
        const nextEmails = (profile.profile.emails ?? []).filter(Boolean);
        const socialMedia = profile.profile.socialMedia ?? {};
        const nextSocials = Object.entries(socialMedia)
          .filter(([, handle]) => Boolean(handle?.trim()))
          .map(([network, handle]) => ({
            network,
            handle: handle.trim(),
            icon: SOCIAL_ICONS[network] ?? "/images/icons/telegram.png",
          }));

        setMeshkeeId(id);
        setName(meshkee.name || listing.slug);
        setSlug(listing.slug);
        setCategoryName(meshkee.categories[0]?.name ?? "");
        setLogoUrl(profile.profile.logoUrl ?? meshkee.logoUrl);
        setBannerUrl(profile.profile.bannerUrl ?? meshkee.bannerUrl);
        setAbout(profile.profile.about ?? "");
        setVision(profile.profile.vision ?? "");
        if (meshkee.createdAt) {
          const joined = new Date(meshkee.createdAt);
          setSinceMonth(
            joined.toLocaleDateString("en-US", { month: "long" }),
          );
          setSinceYear(String(joined.getFullYear()));
        } else {
          setSinceMonth("");
          setSinceYear("");
        }
        setProvince(nextAddresses[0]?.province ?? "");
        setTelephone(
          nextPhones.find((item) => item.number.trim())?.number ??
            nextAddresses.find((item) => (item.landline ?? "").trim())
              ?.landline ??
            "",
        );
        setProductTotal(productsRes.total ?? 0);
        setBlogTotal(blogsRes.total ?? 0);
        setPortfolioTotal(portfoliosRes.total ?? 0);
        setAddresses(nextAddresses);
        setPhones(nextPhones as BusinessPhoneNumber[]);
        setEmails(nextEmails);
        setSocials(nextSocials);
      } catch (err) {
        if (cancelled) return;
        setError(
          err instanceof Error
            ? err.message
            : "Could not load business details.",
        );
      } finally {
        if (!cancelled) setLoading(false);
      }
    })();

    return () => {
      cancelled = true;
    };
  }, [listingId]);

  const contactReady = hasContactData({
    addresses,
    phones,
    emails,
    socials,
  });

  const availableTabs = useMemo(() => {
    const tabs: TabId[] = [];
    if (productTotal > 0) tabs.push("products");
    if (contactReady) tabs.push("contact");
    if (blogTotal > 0) tabs.push("blog");
    // Gallery disabled until a dedicated gallery section exists (media library ≠ gallery).
    if (portfolioTotal > 0) tabs.push("portfolios");
    return tabs;
  }, [productTotal, contactReady, blogTotal, portfolioTotal]);

  useEffect(() => {
    if (!availableTabs.length) return;
    if (!availableTabs.includes(tab)) setTab(availableTabs[0]);
  }, [availableTabs, tab]);

  const description = toPlainText(about) || toPlainText(vision);

  function openBusinessDashboard(nextPath: string) {
    if (!meshkeeId) return;
    openBusinessDashboardAsAdmin(meshkeeId, nextPath);
  }

  if (loading) {
    return <div className={styles.loading}>Loading business details…</div>;
  }

  if (error) {
    return (
      <div className={styles.error} role="alert">
        <p className={styles.errorTitle}>Could not load details</p>
        <p className={styles.errorCopy}>{error}</p>
        <Link href="/businesses" className={styles.backLink}>
          Back to businesses
        </Link>
      </div>
    );
  }

  return (
    <div className={styles.page}>
      <header className={styles.head}>
        <nav className={styles.breadcrumb} aria-label="Breadcrumb">
          <Link href="/">Home</Link>
          <span className={styles.breadcrumbSep} aria-hidden>
            /
          </span>
          <Link href="/businesses">Businesses</Link>
          <span className={styles.breadcrumbSep} aria-hidden>
            /
          </span>
          <span className={styles.breadcrumbCurrent}>{name}</span>
        </nav>
        <div className={styles.headActions}>
          <button
            type="button"
            className={`outline-btn ${styles.actionBtn}`}
            disabled={!meshkeeId}
            onClick={() => openBusinessDashboard("/profile")}
          >
            Manage business
          </button>
          <Link
            href={`/businesses/${listingId}/edit`}
            className={`outline-btn ${styles.actionBtn}`}
          >
            Edit listing
          </Link>
        </div>
      </header>

      <section className={styles.hero}>
        {bannerUrl ? (
          <img src={bannerUrl} alt="" className={styles.heroImg} />
        ) : (
          <div className={styles.heroFallback} aria-hidden />
        )}
      </section>

      <section className={styles.profile}>
        <div className={styles.profileBar}>
          <div className={styles.identity}>
            {logoUrl ? (
              <img className={styles.logo} src={logoUrl} alt="" height={56} />
            ) : (
              <span className={styles.logoMark} aria-hidden>
                {name.slice(0, 1).toUpperCase()}
              </span>
            )}
            <div>
              <h2 className={styles.name}>{name}</h2>
              <p className={styles.tagline}>{categoryName || `/${slug}`}</p>
            </div>
          </div>
          <div className={styles.stats}>
            {sinceMonth && sinceYear ? (
              <div className={styles.stat}>
                <span className={styles.statLabel}>since</span>
                <strong className={styles.statValue}>{sinceYear}</strong>
                <span className={styles.statMonth}>{sinceMonth}</span>
              </div>
            ) : null}
            {province ? (
              <div className={styles.stat}>
                <span className={styles.statLabel}>province</span>
                <strong className={styles.statValue}>{province}</strong>
              </div>
            ) : null}
            <div className={styles.statWide}>
              <strong className={styles.statValueLg}>{portfolioTotal}</strong>
              <span className={styles.statLabelStack}>
                active
                <br />
                {portfolioTotal === 1 ? "portfolio" : "portfolios"}
              </span>
            </div>
            {telephone ? (
              <div className={styles.stat}>
                <span className={styles.statLabel}>Telephone</span>
                <strong className={styles.statValue}>{telephone}</strong>
              </div>
            ) : null}
          </div>
        </div>
        {description ? (
          <p className={styles.description} dir="auto">
            {description}
          </p>
        ) : null}
      </section>

      {availableTabs.length && meshkeeId ? (
        <>
          <nav className={styles.tabs} aria-label="Business sections">
            {availableTabs.map((id) => (
              <button
                key={id}
                type="button"
                className={tab === id ? styles.tabActive : styles.tab}
                onClick={() => setTab(id)}
              >
                {TAB_LABELS[id]}
              </button>
            ))}
          </nav>

          <section className={styles.panel} aria-live="polite">
            {tab === "products" ? (
              <ProductsPanel
                meshkeeId={meshkeeId}
                controlsMode="manage"
                onManage={() => openBusinessDashboard("/products")}
              />
            ) : null}

            {tab === "contact" ? (
              <div className={styles.contact}>
                <div className={styles.contactRows}>
                  {addresses.map((address, index) => (
                    <div
                      key={address.id ?? `${address.city}-${index}`}
                      className={styles.contactRow}
                    >
                      <span className={styles.contactLabel}>
                        {address.name || "Address"}
                      </span>
                      <p dir="auto">
                        {[address.address, address.city, address.province]
                          .filter(Boolean)
                          .join(", ")}
                      </p>
                      {address.postalCode ? (
                        <p>Postal: {address.postalCode}</p>
                      ) : null}
                      {address.landline ? (
                        <p>Landline: {address.landline}</p>
                      ) : null}
                    </div>
                  ))}
                  {phones.length ? (
                    <div className={styles.contactRow}>
                      <span className={styles.contactLabel}>Phones</span>
                      <p>
                        {phones
                          .filter((item) => item.number.trim())
                          .map((item) => item.number)
                          .join(" · ")}
                      </p>
                    </div>
                  ) : null}
                  {emails.length ? (
                    <div className={styles.contactRow}>
                      <span className={styles.contactLabel}>Email</span>
                      <p>{emails.join(" · ")}</p>
                    </div>
                  ) : null}
                </div>
                {socials.length ? (
                  <div className={styles.socials}>
                    {socials.map((social) => (
                      <span key={social.network} className={styles.socialChip}>
                        <img src={social.icon} alt="" width={16} height={16} />
                        <em>{social.network}</em> {social.handle}
                      </span>
                    ))}
                  </div>
                ) : null}
                <button
                  type="button"
                  className={`outline-btn ${styles.actionBtn}`}
                  style={{ marginTop: 18 }}
                  onClick={() => openBusinessDashboard("/profile")}
                >
                  Manage business
                </button>
              </div>
            ) : null}

            {tab === "blog" ? (
              <BlogPanel
                meshkeeId={meshkeeId}
                controlsMode="manage"
                onManage={() => openBusinessDashboard("/blog")}
              />
            ) : null}
            {tab === "portfolios" ? (
              <PortfoliosPanel
                meshkeeId={meshkeeId}
                controlsMode="manage"
                onManage={() => openBusinessDashboard("/portfolios")}
              />
            ) : null}
          </section>
        </>
      ) : (
        <div className={styles.emptyTabs}>
          No catalog tabs yet — products, blog, portfolios, or contact data will
          appear here when Meshkee has them.
        </div>
      )}
    </div>
  );
}