"use client";

import { useState, useEffect } from "react";
import Image from "next/image";
import PrivacySecurityBanner from "@/components/widgets/PrivacySecurityBanner/PrivacySecurityBanner";
import { TextInput } from "@/components/ui/TextInput/TextInput";
import type {
  EmailScreenDefinition,
  DefaultTexts,
  FunnelDefinition,
  FunnelAnswers,
} from "@/lib/funnel/types";
import { buildRegistrationDataFromAnswers } from "@/lib/funnel/registrationHelpers";
import { TemplateLayout } from "../layouts/TemplateLayout";
import { createTemplateLayoutProps } from "@/lib/funnel/templateHelpers";
import { zodResolver } from "@hookform/resolvers/zod";
import { useForm } from "react-hook-form";
import { z } from "zod";
import { Spinner } from "@/components/ui/spinner";
import { useAuth } from "@/hooks/auth/useAuth";

const formSchema = z.object({
  email: z.email({
    message: "Please enter a valid email address",
  }),
});

interface EmailTemplateProps {
  funnel: FunnelDefinition;
  screen: EmailScreenDefinition;
  selectedEmail: string;
  onEmailChange: (email: string) => void;
  onContinue: () => void;
  canGoBack: boolean;
  onBack: () => void;
  screenProgress?: { current: number; total: number };
  defaultTexts?: DefaultTexts;
  answers: FunnelAnswers;
}

export function EmailTemplate({
  funnel,
  screen,
  selectedEmail,
  onEmailChange,
  onContinue,
  canGoBack,
  onBack,
  screenProgress,
  defaultTexts,
  answers,
}: EmailTemplateProps) {
  // Собираем данные для регистрации из ответов воронки
  const registrationData = buildRegistrationDataFromAnswers(funnel, answers);

  const { authorization, isLoading, error } = useAuth({
    funnelId: funnel?.meta?.id ?? "preview",
    registrationData,
  });

  const [isTouched, setIsTouched] = useState(false);

  const form = useForm<z.infer<typeof formSchema>>({
    resolver: zodResolver(formSchema),
    defaultValues: {
      email: selectedEmail || "",
    },
  });

  useEffect(() => {
    form.setValue("email", selectedEmail || "");
  }, [selectedEmail, form]);

  const handleChange = (e: React.ChangeEvent<HTMLInputElement>) => {
    const value = e.target.value;
    form.setValue("email", value);
    form.trigger("email");
    onEmailChange(value);
  };

  const handleContinue = async () => {
    const email = form.getValues("email");

    if (!email || !form.formState.isValid || isLoading) {
      return;
    }

    try {
      const token = await authorization(email);
      if (token) {
        onContinue();
      }
    } catch (err) {
      console.error("Authorization failed:", err);
    }
  };

  const isFormValid = form.formState.isValid && form.getValues("email");

  const layoutProps = createTemplateLayoutProps(
    screen,
    { canGoBack, onBack },
    screenProgress,
    {
      preset: "center",
      actionButton: {
        children: isLoading ? <Spinner className="size-6" /> : undefined,
        defaultText: defaultTexts?.nextButton || "Continue",
        disabled: !isFormValid,
        onClick: handleContinue,
      },
    }
  );

  return (
    <TemplateLayout {...layoutProps}>
      <div className="w-full flex flex-col items-center gap-[26px]">
        <TextInput
          label={screen.emailInput?.label || "Email"}
          placeholder={screen.emailInput?.placeholder || "Enter your Email"}
          type="email"
          value={selectedEmail}
          onChange={handleChange}
          onBlur={() => {
            setIsTouched(true);
            form.trigger("email");
          }}
          aria-invalid={(isTouched && !!form.formState.errors.email) || !!error}
          aria-errormessage={
            (isTouched ? form.formState.errors.email?.message : undefined) ||
            (error ? "Something went wrong" : undefined)
          }
        />

        {screen.image && (
          <Image
            src={screen.image.src}
            alt="portrait"
            width={164}
            height={245}
            className="mt-3.5 rounded-[50px] blur-sm"
          />
        )}

        <PrivacySecurityBanner
          className="mt-[26px]"
          text={{
            children:
              defaultTexts?.privacyBanner ||
              "Мы не передаем личную информацию, она остаётся в безопасности и под вашим контролем.",
          }}
        />
      </div>
    </TemplateLayout>
  );
}