"use client";

import { useRouter } from "next/navigation";
import { useState, useTransition } from "react";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Select } from "@/components/ui/select";
import { Textarea } from "@/components/ui/textarea";
import { updateBusinessProfileAction, updateBusinessSettingsAction } from "../actions/business";

const TIMEZONES = ["Europe/London", "Europe/Paris", "Europe/Dublin", "America/New_York", "America/Los_Angeles"];
const CURRENCIES = ["GBP", "USD", "EUR"];
const LOCALES = ["en-GB", "en-US"];

export interface BusinessDetailsInitial {
  name: string;
  description: string;
  logoUrl: string;
  phone: string;
  email: string;
  website: string;
  instagramUrl: string;
  facebookUrl: string;
  timezone: string;
  currency: string;
  locale: string;
  addressLine1: string;
  addressLine2: string;
  city: string;
  region: string;
  postalCode: string;
  country: string;
  cancellationPolicy: string;
  lateArrivalPolicy: string;
  bookingTerms: string;
  privacyPolicyUrl: string;
}

export function BusinessDetailsForm({ initial }: { initial: BusinessDetailsInitial }) {
  const router = useRouter();
  const [form, setForm] = useState(initial);
  const [error, setError] = useState<string | null>(null);
  const [saved, setSaved] = useState(false);
  const [isPending, startTransition] = useTransition();

  const set = <K extends keyof BusinessDetailsInitial>(key: K, value: BusinessDetailsInitial[K]) => {
    setSaved(false);
    setForm((prev) => ({ ...prev, [key]: value }));
  };

  const handleSave = () => {
    setError(null);
    startTransition(async () => {
      const profileResult = await updateBusinessProfileAction({
        profile: {
          name: form.name,
          description: form.description || undefined,
          logoUrl: form.logoUrl || undefined,
          phone: form.phone || undefined,
          email: form.email || undefined,
          website: form.website || undefined,
          instagramUrl: form.instagramUrl || undefined,
          facebookUrl: form.facebookUrl || undefined,
          timezone: form.timezone,
          currency: form.currency,
          locale: form.locale,
        },
        location: {
          addressLine1: form.addressLine1,
          addressLine2: form.addressLine2 || undefined,
          city: form.city,
          region: form.region || undefined,
          postalCode: form.postalCode,
          country: form.country,
        },
      });
      if (!profileResult.success) {
        setError(profileResult.error ?? "Couldn't save business details.");
        return;
      }

      const settingsResult = await updateBusinessSettingsAction({
        cancellationPolicy: form.cancellationPolicy || undefined,
        lateArrivalPolicy: form.lateArrivalPolicy || undefined,
        bookingTerms: form.bookingTerms || undefined,
        privacyPolicyUrl: form.privacyPolicyUrl || undefined,
      });
      if (!settingsResult.success) {
        setError(settingsResult.error ?? "Couldn't save business policies.");
        return;
      }

      setSaved(true);
      router.refresh();
    });
  };

  return (
    <div className="space-y-6 lg:grid lg:grid-cols-2 lg:items-start lg:gap-6 lg:space-y-0">
      <section className="space-y-3">
        <h3 className="text-muted ml-1 text-[10px] font-bold tracking-widest uppercase">Profile</h3>
        <div className="rounded-jumbo border-line space-y-4 border bg-white p-6">
          <Input label="Business Name" required value={form.name} onChange={(e) => set("name", e.target.value)} />
          <Input label="Logo URL" placeholder="https://…" value={form.logoUrl} onChange={(e) => set("logoUrl", e.target.value)} />
          <Textarea label="Description" value={form.description} onChange={(e) => set("description", e.target.value)} />
        </div>
      </section>

      <section className="space-y-3">
        <h3 className="text-muted ml-1 text-[10px] font-bold tracking-widest uppercase">Contact &amp; Address</h3>
        <div className="rounded-jumbo border-line space-y-4 border bg-white p-6">
          <Input label="Street Address" required value={form.addressLine1} onChange={(e) => set("addressLine1", e.target.value)} />
          <Input label="Address Line 2 (optional)" value={form.addressLine2} onChange={(e) => set("addressLine2", e.target.value)} />
          <div className="grid grid-cols-2 gap-4">
            <Input label="City" required value={form.city} onChange={(e) => set("city", e.target.value)} />
            <Input label="Postcode" required value={form.postalCode} onChange={(e) => set("postalCode", e.target.value)} />
          </div>
          <div className="grid grid-cols-2 gap-4">
            <Input label="Region (optional)" value={form.region} onChange={(e) => set("region", e.target.value)} />
            <Input label="Country" value={form.country} onChange={(e) => set("country", e.target.value)} />
          </div>
          <Input label="Phone" type="tel" value={form.phone} onChange={(e) => set("phone", e.target.value)} />
          <Input label="Email" type="email" value={form.email} onChange={(e) => set("email", e.target.value)} />
          <Input label="Website" type="url" placeholder="https://" value={form.website} onChange={(e) => set("website", e.target.value)} />
        </div>
      </section>

      <section className="space-y-3">
        <h3 className="text-muted ml-1 text-[10px] font-bold tracking-widest uppercase">Social Links</h3>
        <div className="rounded-jumbo border-line space-y-4 border bg-white p-6">
          <Input label="Instagram" placeholder="@yourshop" value={form.instagramUrl} onChange={(e) => set("instagramUrl", e.target.value)} />
          <Input label="Facebook" placeholder="facebook.com/yourshop" value={form.facebookUrl} onChange={(e) => set("facebookUrl", e.target.value)} />
        </div>
      </section>

      <section className="space-y-3">
        <h3 className="text-muted ml-1 text-[10px] font-bold tracking-widest uppercase">Regional Settings</h3>
        <div className="rounded-jumbo border-line space-y-4 border bg-white p-6">
          <Select label="Time Zone" value={form.timezone} onChange={(e) => set("timezone", e.target.value)}>
            {TIMEZONES.map((tz) => (
              <option key={tz} value={tz}>
                {tz}
              </option>
            ))}
          </Select>
          <div className="grid grid-cols-2 gap-4">
            <Select label="Currency" value={form.currency} onChange={(e) => set("currency", e.target.value)}>
              {CURRENCIES.map((c) => (
                <option key={c} value={c}>
                  {c}
                </option>
              ))}
            </Select>
            <Select label="Locale" value={form.locale} onChange={(e) => set("locale", e.target.value)}>
              {LOCALES.map((l) => (
                <option key={l} value={l}>
                  {l}
                </option>
              ))}
            </Select>
          </div>
        </div>
      </section>

      <section className="space-y-3">
        <h3 className="text-muted ml-1 text-[10px] font-bold tracking-widest uppercase">Policies</h3>
        <div className="rounded-jumbo border-line space-y-4 border bg-white p-6">
          <Textarea
            label="Cancellation Policy"
            value={form.cancellationPolicy}
            onChange={(e) => set("cancellationPolicy", e.target.value)}
          />
          <Textarea
            label="Late Arrival Policy"
            value={form.lateArrivalPolicy}
            onChange={(e) => set("lateArrivalPolicy", e.target.value)}
          />
          <Textarea label="Booking Terms" value={form.bookingTerms} onChange={(e) => set("bookingTerms", e.target.value)} />
          <Input
            label="Privacy Policy URL"
            type="url"
            placeholder="https://"
            value={form.privacyPolicyUrl}
            onChange={(e) => set("privacyPolicyUrl", e.target.value)}
          />
        </div>
      </section>

      <div className="space-y-4 lg:col-span-2">
        {error && (
          <p role="alert" className="text-danger text-sm font-medium">
            {error}
          </p>
        )}
        {saved && !error && (
          <p role="status" className="text-accent text-sm font-medium">
            Saved — changes are live for customers immediately.
          </p>
        )}
        <Button className="w-full" isLoading={isPending} onClick={handleSave}>
          Save
        </Button>
      </div>
    </div>
  );
}