"use client";

import { useEffect, useMemo, useState } from "react";
import {
  getQuestionAnswersStorageKey,
  hasQuestionAnswerValue,
} from "@/components/questions/question-answer-storage";
import InformationSheet from "@/components/ui/information-sheet";
import type { MarriageField, MarriagePhoneFieldValue } from "@/hooks/marriage/types";
import { useMarriageSectionsQuery } from "@/hooks/marriage/use-sections";

type AnswerPaceSheetProps = {
  continueLabel: string;
  description: string;
  slug: string;
  title: string;
};

type StoredQuestionAnswers = {
  fields?: unknown;
};

function isMarriageField(value: unknown): value is MarriageField {
  if (!value || typeof value !== "object") {
    return false;
  }

  const field = value as Partial<MarriageField>;

  return (
    typeof field.key === "string" &&
    typeof field.label === "string" &&
    typeof field.type === "string" &&
    (field.value === null ||
      typeof field.value === "string" ||
      typeof field.value === "number" ||
      typeof field.value === "boolean" ||
      isMarriagePhoneFieldValue(field.value))
  );
}

function isMarriagePhoneFieldValue(
  value: unknown,
): value is MarriagePhoneFieldValue {
  if (!value || typeof value !== "object") {
    return false;
  }

  const phoneValue = value as Partial<MarriagePhoneFieldValue>;

  return (
    typeof phoneValue.countryCode === "string" &&
    typeof phoneValue.phoneNumber === "string"
  );
}

function hasStoredQuestionProgress(slugs: readonly string[]) {
  try {
    return slugs.some((slug) => {
      const rawValue = window.localStorage.getItem(
        getQuestionAnswersStorageKey(slug),
      );

      if (!rawValue) {
        return false;
      }

      const storedValue = JSON.parse(rawValue) as StoredQuestionAnswers;
      const fields = Array.isArray(storedValue.fields)
        ? storedValue.fields.filter(isMarriageField)
        : [];

      return fields.some((field) => hasQuestionAnswerValue(field.value));
    });
  } catch {
    return false;
  }
}

export default function AnswerPaceSheet({
  continueLabel,
  description,
  slug,
  title,
}: AnswerPaceSheetProps) {
  const { data: sections, isSuccess } = useMarriageSectionsQuery();
  const [hasSeenSheet, setHasSeenSheet] = useState(true);
  const [hasLocalProgress, setHasLocalProgress] = useState(true);
  const storageKey = `marriage:sections:${slug}:answer-pace-sheet-seen`;
  const sectionSlugs = useMemo(
    () => sections?.map((section) => section.slug) ?? [slug],
    [sections, slug],
  );

  const hasAnySectionProgress = useMemo(() => {
    if (!sections?.length) {
      return true;
    }

    return sections.some(
      (section) => section.current_step > 0 || section.completion_percent >= 1,
    );
  }, [sections]);

  const isOpen =
    isSuccess && !hasSeenSheet && !hasLocalProgress && !hasAnySectionProgress;

  useEffect(() => {
    setHasSeenSheet(window.sessionStorage.getItem(storageKey) === "true");
    setHasLocalProgress(hasStoredQuestionProgress(sectionSlugs));
  }, [sectionSlugs, storageKey]);

  useEffect(() => {
    if (!isOpen) {
      return;
    }

    window.sessionStorage.setItem(storageKey, "true");
  }, [isOpen, storageKey]);

  if (!isOpen) {
    return null;
  }

  return (
    <InformationSheet
      icon="play"
      title={title}
      description={description}
      buttons={continueLabel}
    />
  );
}