"use client";

import Image from "next/image";
import { useMemo } from "react";
import { FaBell } from "react-icons/fa6";
import Button from "@/components/ui/button";
import { PageBackground } from "@/components/utils/page-background";
import type {
  MarriageField,
  MarriageFieldValue,
  MarriageMatchSummary,
} from "@/hooks/marriage/types";
import { useMarriageProfileQuery } from "@/hooks/marriage/use-profile-main";
import { useI18n } from "@/i18n/provider";

const advisorAvatars = [
  { id: "advisor-primary", src: "/assets/images/Avatar Image.png" },
  { id: "advisor-secondary", src: "/assets/images/Ellipse 370.png" },
  { id: "advisor-tertiary", src: "/assets/images/Avatar Image.png" },
];

const fieldCandidates = {
  name: ["name", "full_name", "fullname", "first_name", "display_name"],
  occupation: ["occupation", "job", "profession", "career", "work"],
  age: ["age"],
  city: ["city", "current_city", "residence_city", "location", "residence"],
  maritalStatus: ["marital_status", "maritalstatus", "relationship_status"],
  cityPreference: [
    "city_preference",
    "citypreference",
    "preferred_city",
    "preferred_location",
    "future_residence",
  ],
} as const;

type DisplayField = {
  id: string;
  label: string;
  value: string;
};

function normalizeFieldName(value: string) {
  return value
    .toLowerCase()
    .replace(/^q\d+[_-]?/, "")
    .replace(/[^a-z0-9]/g, "");
}

function formatFieldValue(value: MarriageFieldValue) {
  if (value === null || value === "") {
    return null;
  }

  if (typeof value === "boolean") {
    return value ? "Yes" : "No";
  }

  return String(value);
}

function titleFromKey(key: string) {
  return key
    .replace(/^q\d+[_-]?/i, "")
    .replace(/[_-]+/g, " ")
    .replace(/\s+/g, " ")
    .trim()
    .replace(/\b\w/g, (letter) => letter.toUpperCase());
}

function toDisplayField(field: MarriageField): DisplayField | null {
  const value = formatFieldValue(field.value);

  if (!value) {
    return null;
  }

  return {
    id: field.key || field.label || value,
    label: field.label || titleFromKey(field.key),
    value,
  };
}

function pickField(
  fields: MarriageField[],
  candidates: readonly string[],
  usedIndexes: Set<number>,
) {
  const candidateSet = new Set(candidates.map(normalizeFieldName));
  for (const [fieldIndex, field] of fields.entries()) {
    if (usedIndexes.has(fieldIndex)) {
      continue;
    }

    const displayField = toDisplayField(field);

    if (
      displayField &&
      [field.key, field.label].some((value) =>
        candidateSet.has(normalizeFieldName(value)),
      )
    ) {
      usedIndexes.add(fieldIndex);
      return displayField;
    }
  }

  return null;
}

function useMatchSummaryDisplay(matchSummary: MarriageMatchSummary | null) {
  return useMemo(() => {
    const fields = matchSummary?.public_info ?? [];
    const usedIndexes = new Set<number>();
    const name = pickField(fields, fieldCandidates.name, usedIndexes);
    const occupation = pickField(
      fields,
      fieldCandidates.occupation,
      usedIndexes,
    );
    const age = pickField(fields, fieldCandidates.age, usedIndexes);
    const city = pickField(fields, fieldCandidates.city, usedIndexes);
    const maritalStatus = pickField(
      fields,
      fieldCandidates.maritalStatus,
      usedIndexes,
    );
    const cityPreference = pickField(
      fields,
      fieldCandidates.cityPreference,
      usedIndexes,
    );
    const extraFields = fields
      .filter((_, index) => !usedIndexes.has(index))
      .map(toDisplayField)
      .filter((field): field is DisplayField => Boolean(field))
      .slice(0, 4);

    return {
      age,
      city,
      cityPreference,
      extraFields,
      maritalStatus,
      name:
        name?.value ??
        (matchSummary?.id ? `Profile #${matchSummary.id}` : null),
      occupation,
    };
  }, [matchSummary]);
}

function FieldLine({ field }: { field: DisplayField }) {
  return (
    <p className="break-words text-[10px] leading-[1.85] font-medium text-white">
      <span>{field.label}: </span>
      <span>{field.value}</span>
    </p>
  );
}

export default function NewMatchPage() {
  const { dictionary: t } = useI18n();
  const { data: profile, isError, isLoading } = useMarriageProfileQuery();
  const matchSummary = profile?.match_summary ?? null;
  const matchDisplay = useMatchSummaryDisplay(matchSummary);
  const pairedFields = [matchDisplay.age, matchDisplay.city].filter(
    (field): field is DisplayField => Boolean(field),
  );

  return (
    <>
      <PageBackground />

      <main className="-mx-[17px] flex min-h-screen flex-col px-[5px] pt-5 pb-5 text-center">
        <section className="flex flex-col items-center">
          <div
            aria-hidden="true"
            className="relative flex h-[60px] w-[60px] items-center justify-center rounded-full bg-[#FF4E67] shadow-[0_12px_28px_rgba(240,68,91,0.22)]"
          >
            <span className="absolute top-3 right-3 h-2 w-2 rounded-full border-2 border-[#FFD54B] border-b-0 border-l-0" />
            <span className="absolute top-4 right-2 h-3 w-3 rounded-full border-2 border-[#FFD54B] border-b-0 border-l-0" />
            <FaBell className="size-8 -rotate-12 text-[#FFD84A] drop-shadow-[0_2px_0_rgba(151,92,0,0.45)]" />
          </div>

          <h1 className="mt-[15px] text-[17px] leading-none font-black tracking-[0.02em] text-[#111111] uppercase">
            You have a new match!
          </h1>

          <p className="mt-[11px] max-w-[322px] text-[12px] leading-[1.35] font-semibold text-[#7C7C7C]">
            A matching profile has been found. Information is provided by the
            girl&apos;s family or introducers. If you approve, we&apos;ll share
            your profile with her family
          </p>
        </section>

        <section className="mt-[36px] rounded-[11px] bg-[linear-gradient(180deg,#F0445B_0%,#F4556E_100%)] px-[17px] pt-[18px] pb-[17px] text-white shadow-[0_18px_38px_rgba(240,68,91,0.25)]">
          {isLoading ? (
            <p className="py-8 text-[13px] font-semibold">
              Loading match summary...
            </p>
          ) : isError ? (
            <p className="py-8 text-[13px] font-semibold">
              Unable to load match summary.
            </p>
          ) : matchSummary ? (
            <>
              <h2 className="break-words text-[13px] leading-[1.4] font-bold">
                <span>Name: </span>
                <span>{matchDisplay.name}</span>
              </h2>

              <div className="mt-[3px] min-h-[68px]">
                {matchDisplay.occupation ? (
                  <FieldLine field={matchDisplay.occupation} />
                ) : null}

                {pairedFields.length ? (
                  <p className="break-words text-[10px] leading-[1.85] font-medium text-white">
                    {pairedFields.map((field, index) => (
                      <span key={field.id}>
                        {index > 0 ? <span> | </span> : null}
                        <span>
                          {field.label}: {field.value}
                        </span>
                      </span>
                    ))}
                  </p>
                ) : null}

                {matchDisplay.maritalStatus ? (
                  <FieldLine field={matchDisplay.maritalStatus} />
                ) : null}
                {matchDisplay.cityPreference ? (
                  <FieldLine field={matchDisplay.cityPreference} />
                ) : null}
                {matchDisplay.extraFields.map((field) => (
                  <FieldLine key={field.id} field={field} />
                ))}
              </div>

              <Button
                className="mt-[15px] rounded-[7px] border-none bg-white bg-none py-[12px] text-[#F0445B]! shadow-none"
                href="/new-match/profile"
              >
                View Profile
              </Button>
            </>
          ) : (
            <p className="py-8 text-[13px] font-semibold">
              No match summary is available yet.
            </p>
          )}
        </section>

        <section className="mt-[29px] rounded-[12px] border border-white/80 bg-white/78 px-3 py-3.5 text-left shadow-[0_18px_45px_rgba(15,23,42,0.06)] backdrop-blur-sm">
          <h2 className="text-[16px] leading-none font-bold text-[#1C1C1C]">
            {t.findingMatch.advisorTitle}
          </h2>
          <p className="mt-2 max-w-[280px] text-[11px] leading-[1.45] font-semibold text-[#8A8A8A]">
            {t.findingMatch.advisorDescription}
          </p>

          <div className="mt-4 flex items-center justify-between gap-3">
            <div className="flex items-center pl-1">
              {advisorAvatars.map((avatar) => (
                <span
                  key={avatar.id}
                  className="-ml-1.5 flex h-[30px] w-[30px] overflow-hidden rounded-full border-2 border-white bg-[#E7E7E7] first:ml-0"
                >
                  <Image
                    src={avatar.src}
                    alt=""
                    width={30}
                    height={30}
                    className="h-full w-full object-cover"
                  />
                </span>
              ))}
              <span className="-ml-1.5 flex h-[30px] w-[30px] items-center justify-center rounded-full border-2 border-white bg-[#EDEEF1] text-[12px] font-semibold text-[#1C1C1C]">
                +7
              </span>
            </div>

            <Button
              className="w-auto rounded-[9px] border-none bg-[#EBEDF0] bg-none px-5 py-[13px] text-[#111111]! shadow-none"
              href="/questions-list"
            >
              {t.findingMatch.getAdvisor}
            </Button>
          </div>
        </section>
      </main>
    </>
  );
}