/** 시도별 노후관로 현황의 조회 연도와 그룹 컬럼을 구성한다. */
"use client";

import type { UiHeadProps } from "@common/business_components/ui";

export const AGED_PIPE_STATUS_BY_CTPV_DEFAULT_ELAPSED_YEARS = 30;
export const AGED_PIPE_STATUS_BY_CTPV_MAX_YEAR_SPAN = 3;
export const AGED_PIPE_STATUS_BY_CTPV_PAGE_SIZE = 50;

export type AgedPipeStatusByCtpvFilters = {
  startYear: number;
  endYear: number;
  elapsedYears: number;
};

export type AgedPipeStatusByCtpvYearStat = {
  year: number;
  totalLengthKm: number;
  agedLengthKm: number;
  agedRate: number;
};

export type AgedPipeStatusByCtpvRow = {
  rowNumber: number;
  ctpvCd: string;
  ctpvNm: string;
  yearStats: AgedPipeStatusByCtpvYearStat[];
  [key: string]: string | number | AgedPipeStatusByCtpvYearStat[];
};

export type AgedPipeStatusByCtpvResponse = {
  startYear: number;
  endYear: number;
  elapsedYears: number;
  years: number[];
  rows: Array<{
    ctpvCd: string;
    ctpvNm: string;
    yearStats: AgedPipeStatusByCtpvYearStat[];
  }>;
};

export const normalizeAgedPipeStatusByCtpvResponse = (
  response: Partial<AgedPipeStatusByCtpvResponse> | null | undefined,
): AgedPipeStatusByCtpvResponse => ({
  startYear: Number(response?.startYear ?? 0),
  endYear: Number(response?.endYear ?? 0),
  elapsedYears: Number(
    response?.elapsedYears ?? AGED_PIPE_STATUS_BY_CTPV_DEFAULT_ELAPSED_YEARS,
  ),
  years: Array.isArray(response?.years)
    ? response.years.map((year) => Number(year))
    : [],
  rows: Array.isArray(response?.rows) ? response.rows : [],
});

export const buildAgedPipeStatusYearOptions = () => {
  const currentYear = new Date().getFullYear();
  return Array.from(
    { length: currentYear - 1900 + 1 },
    (_, index) => currentYear - index,
  );
};

export const normalizeAgedPipeStatusByCtpvFilters = (
  filters: Partial<AgedPipeStatusByCtpvFilters>,
): AgedPipeStatusByCtpvFilters => {
  const currentYear = new Date().getFullYear();
  let startYear = Math.trunc(Number(filters.startYear ?? currentYear - 2));
  let endYear = Math.trunc(Number(filters.endYear ?? currentYear));
  let elapsedYears = Math.trunc(
    Number(
      filters.elapsedYears ?? AGED_PIPE_STATUS_BY_CTPV_DEFAULT_ELAPSED_YEARS,
    ),
  );

  if (!Number.isFinite(startYear)) startYear = currentYear - 2;
  if (!Number.isFinite(endYear)) endYear = currentYear;
  if (
    !Number.isFinite(elapsedYears) ||
    elapsedYears < 1 ||
    elapsedYears > 100
  ) {
    elapsedYears = AGED_PIPE_STATUS_BY_CTPV_DEFAULT_ELAPSED_YEARS;
  }
  if (startYear > endYear) {
    const swap = startYear;
    startYear = endYear;
    endYear = swap;
  }

  return {
    startYear,
    endYear,
    elapsedYears,
  };
};

/** 입력한 기준년도·경과년도가 조회 가능한 범위인지 사용자 안내 문구로 반환한다. */
export const getAgedPipeStatusByCtpvValidationMessage = (
  filters: AgedPipeStatusByCtpvFilters,
) => {
  if (filters.startYear > filters.endYear) {
    return "기준년도 시작은 종료보다 늦을 수 없습니다.";
  }
  if (
    filters.endYear - filters.startYear + 1 >
    AGED_PIPE_STATUS_BY_CTPV_MAX_YEAR_SPAN
  ) {
    return `기준년도 조회 범위는 최대 ${AGED_PIPE_STATUS_BY_CTPV_MAX_YEAR_SPAN}년까지 가능합니다.`;
  }
  if (filters.elapsedYears < 1 || filters.elapsedYears > 100) {
    return "노후관로 기준은 1년부터 100년까지 입력할 수 있습니다.";
  }
  return null;
};

export const validateAgedPipeStatusByCtpvFilters = (
  filters: AgedPipeStatusByCtpvFilters,
) => getAgedPipeStatusByCtpvValidationMessage(filters) === null;

const formatMetric = (value: number) =>
  Number(value ?? 0).toLocaleString("ko-KR", {
    minimumFractionDigits: 2,
    maximumFractionDigits: 2,
  });

export const toAgedPipeStatusByCtpvRows = (
  response: Partial<AgedPipeStatusByCtpvResponse> | null | undefined,
): AgedPipeStatusByCtpvRow[] =>
  normalizeAgedPipeStatusByCtpvResponse(response).rows.map((row, index) => {
    const displayRow: AgedPipeStatusByCtpvRow = {
      rowNumber: index + 1,
      ctpvCd: String(row.ctpvCd ?? "").trim(),
      ctpvNm: String(row.ctpvNm ?? "").trim(),
      yearStats: row.yearStats ?? [],
    };

    (row.yearStats ?? []).forEach((yearStat) => {
      displayRow[`year${yearStat.year}TotalLengthKm`] = formatMetric(
        Number(yearStat.totalLengthKm ?? 0),
      );
      displayRow[`year${yearStat.year}AgedLengthKm`] = formatMetric(
        Number(yearStat.agedLengthKm ?? 0),
      );
      displayRow[`year${yearStat.year}AgedRate`] = formatMetric(
        Number(yearStat.agedRate ?? 0),
      );
    });

    return displayRow;
  });

export const buildAgedPipeStatusByCtpvHeadList = (
  years: number[],
): UiHeadProps[] => {
  const heads: UiHeadProps[] = [
    { id: "ctpvNm", title: "시도", widthPercent: 14 },
  ];

  years.forEach((year) => {
    heads.push(
      {
        id: `year${year}TotalLengthKm`,
        title: `${year} 전체관로연장(km)`,
        widthPercent: 13,
        align: "right",
      },
      {
        id: `year${year}AgedLengthKm`,
        title: `${year} 노후관로연장(km)`,
        widthPercent: 13,
        align: "right",
      },
      {
        id: `year${year}AgedRate`,
        title: `${year} 노후화율(%)`,
        widthPercent: 11,
        align: "right",
      },
    );
  });

  return heads;
};