'use client';

/**
 * CEO Dashboard API 연동 Hook
 *
 * 각 섹션별 API 호출 및 데이터 변환 담당
 * 참조 패턴: useClientList.ts
 */

import { useState, useCallback, useEffect } from 'react';

import type {
  DailyReportApiResponse,
  ReceivablesApiResponse,
  BadDebtApiResponse,
  ExpectedExpenseApiResponse,
  CardTransactionApiResponse,
  StatusBoardApiResponse,
  TodayIssueApiResponse,
  CalendarApiResponse,
  VatApiResponse,
  EntertainmentApiResponse,
  WelfareApiResponse,
  WelfareDetailApiResponse,
  ExpectedExpenseDashboardDetailApiResponse,
  LoanDashboardApiResponse,
  TaxSimulationApiResponse,
} from '@/lib/api/dashboard/types';

import {
  fetchLoanDashboard,
  fetchTaxSimulation,
} from '@/lib/api/dashboard/endpoints';

import {
  transformDailyReportResponse,
  transformReceivableResponse,
  transformDebtCollectionResponse,
  transformMonthlyExpenseResponse,
  transformCardManagementResponse,
  transformStatusBoardResponse,
  transformTodayIssueResponse,
  transformCalendarResponse,
  transformVatResponse,
  transformEntertainmentResponse,
  transformWelfareResponse,
  transformWelfareDetailResponse,
  transformExpectedExpenseDetailResponse,
  transformPurchaseDetailResponse,
  transformCardDetailResponse,
  transformBillDetailResponse,
} from '@/lib/api/dashboard/transformers';

import type {
  DailyReportData,
  ReceivableData,
  DebtCollectionData,
  MonthlyExpenseData,
  CardManagementData,
  TodayIssueItem,
  TodayIssueListItem,
  CalendarScheduleItem,
  VatData,
  EntertainmentData,
  WelfareData,
  DetailModalConfig,
} from '@/components/business/CEODashboard/types';

// ============================================
// 공통 fetch 유틸리티
// ============================================

async function fetchApi<T>(endpoint: string): Promise<T> {
  const response = await fetch(`/api/proxy/${endpoint}`);

  if (!response.ok) {
    throw new Error(`API 오류: ${response.status}`);
  }

  const result = await response.json();

  if (!result.success) {
    throw new Error(result.message || '데이터 조회 실패');
  }

  return result.data;
}

// ============================================
// 1. DailyReport Hook
// ============================================

export function useDailyReport() {
  const [data, setData] = useState<DailyReportData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const apiData = await fetchApi<DailyReportApiResponse>('daily-report/summary');
      const transformed = transformDailyReportResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('DailyReport API Error:', err);
    } finally {
      setLoading(false);
    }
  }, []);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 2. Receivable Hook
// ============================================

export function useReceivable() {
  const [data, setData] = useState<ReceivableData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const apiData = await fetchApi<ReceivablesApiResponse>('receivables/summary');
      const transformed = transformReceivableResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('Receivable API Error:', err);
    } finally {
      setLoading(false);
    }
  }, []);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 3. DebtCollection Hook
// ============================================

export function useDebtCollection() {
  const [data, setData] = useState<DebtCollectionData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const apiData = await fetchApi<BadDebtApiResponse>('bad-debts/summary');
      const transformed = transformDebtCollectionResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('DebtCollection API Error:', err);
    } finally {
      setLoading(false);
    }
  }, []);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 4. MonthlyExpense Hook
// ============================================

export function useMonthlyExpense() {
  const [data, setData] = useState<MonthlyExpenseData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const apiData = await fetchApi<ExpectedExpenseApiResponse>('expected-expenses/summary');
      const transformed = transformMonthlyExpenseResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('MonthlyExpense API Error:', err);
    } finally {
      setLoading(false);
    }
  }, []);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 5. CardManagement Hook
// ============================================

export function useCardManagement(fallbackData?: CardManagementData) {
  const [data, setData] = useState<CardManagementData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      // 3개 API 병렬 호출: 카드거래, 가지급금, 세금 시뮬레이션
      const [cardApiData, loanResponse, taxResponse] = await Promise.all([
        fetchApi<CardTransactionApiResponse>('card-transactions/summary'),
        fetchLoanDashboard(),
        fetchTaxSimulation(),
      ]);

      // LoanDashboard와 TaxSimulation은 ApiResponse wrapper가 있으므로 data 추출
      const loanData = loanResponse.success ? loanResponse.data : null;
      const taxData = taxResponse.success ? taxResponse.data : null;

      const transformed = transformCardManagementResponse(cardApiData, loanData, taxData, fallbackData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('CardManagement API Error:', err);
    } finally {
      setLoading(false);
    }
  }, [fallbackData]);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 6. StatusBoard Hook
// ============================================

export function useStatusBoard() {
  const [data, setData] = useState<TodayIssueItem[] | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const apiData = await fetchApi<StatusBoardApiResponse>('status-board/summary');
      const transformed = transformStatusBoardResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('StatusBoard API Error:', err);
    } finally {
      setLoading(false);
    }
  }, []);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 7. TodayIssue Hook
// ============================================

export interface TodayIssueData {
  items: TodayIssueListItem[];
  totalCount: number;
}

export function useTodayIssue(limit: number = 30) {
  const [data, setData] = useState<TodayIssueData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const apiData = await fetchApi<TodayIssueApiResponse>(`today-issues/summary?limit=${limit}`);
      const transformed = transformTodayIssueResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('TodayIssue API Error:', err);
    } finally {
      setLoading(false);
    }
  }, [limit]);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 7-1. PastIssue Hook (이전 이슈 - 날짜별 조회)
// ============================================

export function usePastIssue(date: string | null, limit: number = 30) {
  const [data, setData] = useState<TodayIssueData | null>(null);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    if (!date) return;

    try {
      setLoading(true);
      setError(null);

      const apiData = await fetchApi<TodayIssueApiResponse>(
        `today-issues/summary?limit=${limit}&date=${date}`
      );
      const transformed = transformTodayIssueResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('PastIssue API Error:', err);
    } finally {
      setLoading(false);
    }
  }, [date, limit]);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 8. Calendar Hook
// ============================================

export interface CalendarData {
  items: CalendarScheduleItem[];
  totalCount: number;
}

export interface UseCalendarOptions {
  /** 조회 시작일 (Y-m-d, 기본: 이번 달 1일) */
  startDate?: string;
  /** 조회 종료일 (Y-m-d, 기본: 이번 달 말일) */
  endDate?: string;
  /** 일정 타입 필터 (schedule|order|construction|other|null=전체) */
  type?: 'schedule' | 'order' | 'construction' | 'other' | null;
  /** 부서 필터 (all|department|personal) */
  departmentFilter?: 'all' | 'department' | 'personal';
}

export function useCalendar(options: UseCalendarOptions = {}) {
  const { startDate, endDate, type, departmentFilter = 'all' } = options;
  const [data, setData] = useState<CalendarData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      // 쿼리 파라미터 구성
      const params = new URLSearchParams();
      if (startDate) params.append('start_date', startDate);
      if (endDate) params.append('end_date', endDate);
      if (type) params.append('type', type);
      if (departmentFilter) params.append('department_filter', departmentFilter);

      const queryString = params.toString();
      const endpoint = queryString ? `calendar/schedules?${queryString}` : 'calendar/schedules';

      const apiData = await fetchApi<CalendarApiResponse>(endpoint);
      const transformed = transformCalendarResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('Calendar API Error:', err);
    } finally {
      setLoading(false);
    }
  }, [startDate, endDate, type, departmentFilter]);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 9. Vat Hook
// ============================================

export interface UseVatOptions {
  /** 기간 타입 (quarter: 분기, half: 반기, year: 연간) */
  periodType?: 'quarter' | 'half' | 'year';
  /** 연도 (기본: 현재 연도) */
  year?: number;
  /** 기간 번호 (quarter: 1-4, half: 1-2) */
  period?: number;
}

export function useVat(options: UseVatOptions = {}) {
  const { periodType = 'quarter', year, period } = options;
  const [data, setData] = useState<VatData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      // 쿼리 파라미터 구성
      const params = new URLSearchParams();
      params.append('period_type', periodType);
      if (year) params.append('year', year.toString());
      if (period) params.append('period', period.toString());

      const queryString = params.toString();
      const endpoint = `vat/summary?${queryString}`;

      const apiData = await fetchApi<VatApiResponse>(endpoint);
      const transformed = transformVatResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('Vat API Error:', err);
    } finally {
      setLoading(false);
    }
  }, [periodType, year, period]);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 10. Entertainment Hook (접대비)
// ============================================

export interface UseEntertainmentOptions {
  /** 기간 타입 (annual: 연간, quarterly: 분기) */
  limitType?: 'annual' | 'quarterly';
  /** 기업 유형 (large: 대기업, medium: 중견기업, small: 중소기업) */
  companyType?: 'large' | 'medium' | 'small';
  /** 연도 (기본: 현재 연도) */
  year?: number;
  /** 분기 번호 (1-4, 기본: 현재 분기) */
  quarter?: number;
}

export function useEntertainment(options: UseEntertainmentOptions = {}) {
  const { limitType = 'quarterly', companyType = 'medium', year, quarter } = options;
  const [data, setData] = useState<EntertainmentData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      // 쿼리 파라미터 구성
      const params = new URLSearchParams();
      params.append('limit_type', limitType);
      params.append('company_type', companyType);
      if (year) params.append('year', year.toString());
      if (quarter) params.append('quarter', quarter.toString());

      const queryString = params.toString();
      const endpoint = `entertainment/summary?${queryString}`;

      const apiData = await fetchApi<EntertainmentApiResponse>(endpoint);
      const transformed = transformEntertainmentResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('Entertainment API Error:', err);
    } finally {
      setLoading(false);
    }
  }, [limitType, companyType, year, quarter]);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 11. Welfare Hook (복리후생비)
// ============================================

export interface UseWelfareOptions {
  /** 기간 타입 (annual: 연간, quarterly: 분기) */
  limitType?: 'annual' | 'quarterly';
  /** 계산 방식 (fixed: 1인당 정액, ratio: 급여 대비 비율) */
  calculationType?: 'fixed' | 'ratio';
  /** 1인당 월 정액 (calculation_type=fixed일 때 사용, 기본: 200000) */
  fixedAmountPerMonth?: number;
  /** 급여 대비 비율 (calculation_type=ratio일 때 사용, 기본: 0.05) */
  ratio?: number;
  /** 연도 (기본: 현재 연도) */
  year?: number;
  /** 분기 번호 (1-4, 기본: 현재 분기) */
  quarter?: number;
}

export function useWelfare(options: UseWelfareOptions = {}) {
  const {
    limitType = 'quarterly',
    calculationType = 'fixed',
    fixedAmountPerMonth,
    ratio,
    year,
    quarter,
  } = options;
  const [data, setData] = useState<WelfareData | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      // 쿼리 파라미터 구성
      const params = new URLSearchParams();
      params.append('limit_type', limitType);
      params.append('calculation_type', calculationType);
      if (fixedAmountPerMonth) params.append('fixed_amount_per_month', fixedAmountPerMonth.toString());
      if (ratio) params.append('ratio', ratio.toString());
      if (year) params.append('year', year.toString());
      if (quarter) params.append('quarter', quarter.toString());

      const queryString = params.toString();
      const endpoint = `welfare/summary?${queryString}`;

      const apiData = await fetchApi<WelfareApiResponse>(endpoint);
      const transformed = transformWelfareResponse(apiData);
      setData(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('Welfare API Error:', err);
    } finally {
      setLoading(false);
    }
  }, [limitType, calculationType, fixedAmountPerMonth, ratio, year, quarter]);

  useEffect(() => {
    fetchData();
  }, [fetchData]);

  return { data, loading, error, refetch: fetchData };
}

// ============================================
// 12. WelfareDetail Hook (복리후생비 상세 - 모달용)
// ============================================

export interface UseWelfareDetailOptions {
  /** 계산 방식 (fixed: 1인당 정액, ratio: 급여 대비 비율) */
  calculationType?: 'fixed' | 'ratio';
  /** 1인당 월 정액 (calculation_type=fixed일 때 사용, 기본: 200000) */
  fixedAmountPerMonth?: number;
  /** 급여 대비 비율 (calculation_type=ratio일 때 사용, 기본: 0.05) */
  ratio?: number;
  /** 연도 (기본: 현재 연도) */
  year?: number;
  /** 분기 번호 (1-4, 기본: 현재 분기) */
  quarter?: number;
}

/**
 * 복리후생비 상세 데이터 Hook (모달용)
 * API에서 상세 데이터를 가져와 DetailModalConfig로 변환
 */
export function useWelfareDetail(options: UseWelfareDetailOptions = {}) {
  const {
    calculationType = 'fixed',
    fixedAmountPerMonth,
    ratio,
    year,
    quarter,
  } = options;
  const [modalConfig, setModalConfig] = useState<DetailModalConfig | null>(null);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      // 쿼리 파라미터 구성
      const params = new URLSearchParams();
      params.append('calculation_type', calculationType);
      if (fixedAmountPerMonth) params.append('fixed_amount_per_month', fixedAmountPerMonth.toString());
      if (ratio) params.append('ratio', ratio.toString());
      if (year) params.append('year', year.toString());
      if (quarter) params.append('quarter', quarter.toString());

      const queryString = params.toString();
      const endpoint = `welfare/detail?${queryString}`;

      const apiData = await fetchApi<WelfareDetailApiResponse>(endpoint);
      const transformed = transformWelfareDetailResponse(apiData);
      setModalConfig(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('WelfareDetail API Error:', err);
    } finally {
      setLoading(false);
    }
  }, [calculationType, fixedAmountPerMonth, ratio, year, quarter]);

  return { modalConfig, loading, error, refetch: fetchData };
}

// ============================================
// 13. PurchaseDetail Hook (매입 상세 - me1 모달용)
// ============================================

/**
 * 매입 상세 데이터 Hook (me1 모달용)
 * API에서 상세 데이터를 가져와 DetailModalConfig로 변환
 */
export function usePurchaseDetail() {
  const [modalConfig, setModalConfig] = useState<DetailModalConfig | null>(null);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const response = await fetch('/api/v1/purchases/dashboard-detail');
      if (!response.ok) {
        throw new Error(`API 오류: ${response.status}`);
      }
      const result = await response.json();
      if (!result.success) {
        throw new Error(result.message || '데이터 조회 실패');
      }

      const transformed = transformPurchaseDetailResponse(result.data);
      setModalConfig(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('PurchaseDetail API Error:', err);
    } finally {
      setLoading(false);
    }
  }, []);

  return { modalConfig, loading, error, refetch: fetchData };
}

// ============================================
// 14. CardDetail Hook (카드 상세 - me2 모달용)
// ============================================

/**
 * 카드 상세 데이터 Hook (me2 모달용)
 * API에서 상세 데이터를 가져와 DetailModalConfig로 변환
 */
export function useCardDetail() {
  const [modalConfig, setModalConfig] = useState<DetailModalConfig | null>(null);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const response = await fetch('/api/v1/card-transactions/dashboard');
      if (!response.ok) {
        throw new Error(`API 오류: ${response.status}`);
      }
      const result = await response.json();
      if (!result.success) {
        throw new Error(result.message || '데이터 조회 실패');
      }

      const transformed = transformCardDetailResponse(result.data);
      setModalConfig(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('CardDetail API Error:', err);
    } finally {
      setLoading(false);
    }
  }, []);

  return { modalConfig, loading, error, refetch: fetchData };
}

// ============================================
// 15. BillDetail Hook (발행어음 상세 - me3 모달용)
// ============================================

/**
 * 발행어음 상세 데이터 Hook (me3 모달용)
 * API에서 상세 데이터를 가져와 DetailModalConfig로 변환
 */
export function useBillDetail() {
  const [modalConfig, setModalConfig] = useState<DetailModalConfig | null>(null);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const response = await fetch('/api/v1/bills/dashboard-detail');
      if (!response.ok) {
        throw new Error(`API 오류: ${response.status}`);
      }
      const result = await response.json();
      if (!result.success) {
        throw new Error(result.message || '데이터 조회 실패');
      }

      const transformed = transformBillDetailResponse(result.data);
      setModalConfig(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('BillDetail API Error:', err);
    } finally {
      setLoading(false);
    }
  }, []);

  return { modalConfig, loading, error, refetch: fetchData };
}

// ============================================
// 16. ExpectedExpenseDetail Hook (지출예상 상세 - me4 모달용)
// ============================================

/**
 * 지출예상 상세 데이터 Hook (me4 모달용)
 * API에서 상세 데이터를 가져와 DetailModalConfig로 변환
 */
export function useExpectedExpenseDetail() {
  const [modalConfig, setModalConfig] = useState<DetailModalConfig | null>(null);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const response = await fetch('/api/v1/expected-expenses/dashboard-detail');
      if (!response.ok) {
        throw new Error(`API 오류: ${response.status}`);
      }
      const result = await response.json();
      if (!result.success) {
        throw new Error(result.message || '데이터 조회 실패');
      }

      const transformed = transformExpectedExpenseDetailResponse(result.data);
      setModalConfig(transformed);

    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('ExpectedExpenseDetail API Error:', err);
    } finally {
      setLoading(false);
    }
  }, []);

  return { modalConfig, loading, error, refetch: fetchData };
}

// ============================================
// 17. MonthlyExpenseDetail Hook (당월 예상 지출 상세 - 통합 모달용)
// ============================================

export type MonthlyExpenseCardId = 'me1' | 'me2' | 'me3' | 'me4';

/**
 * 당월 예상 지출 상세 데이터 Hook (통합 모달용)
 * cardId에 따라 다른 API를 호출하고 DetailModalConfig로 변환
 *
 * @example
 * const { modalConfig, loading, error, fetchData } = useMonthlyExpenseDetail();
 * await fetchData('me1'); // 매입 상세 API 호출
 */
export function useMonthlyExpenseDetail() {
  const [modalConfig, setModalConfig] = useState<DetailModalConfig | null>(null);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const fetchData = useCallback(async (cardId: MonthlyExpenseCardId) => {
    try {
      setLoading(true);
      setError(null);

      // 모든 카드가 expected-expenses API를 사용하여 데이터 일관성 보장
      // transaction_type: me1=purchase, me2=card, me3=bill, me4=전체
      let endpoint: string;
      let transactionType: string | null = null;

      switch (cardId) {
        case 'me1':
          transactionType = 'purchase';
          break;
        case 'me2':
          transactionType = 'card';
          break;
        case 'me3':
          transactionType = 'bill';
          break;
        case 'me4':
          transactionType = null; // 전체 조회
          break;
        default:
          throw new Error(`Unknown cardId: ${cardId}`);
      }

      // 단일 API 엔드포인트 사용 (transaction_type으로 필터링)
      endpoint = transactionType
        ? `/api/proxy/expected-expenses/dashboard-detail?transaction_type=${transactionType}`
        : '/api/proxy/expected-expenses/dashboard-detail';

      const transformer = (data: unknown) =>
        transformExpectedExpenseDetailResponse(data as ExpectedExpenseDashboardDetailApiResponse, cardId);

      const response = await fetch(endpoint);
      if (!response.ok) {
        throw new Error(`API 오류: ${response.status}`);
      }
      const result = await response.json();
      if (!result.success) {
        throw new Error(result.message || '데이터 조회 실패');
      }

      const transformed = transformer(result.data);
      setModalConfig(transformed);

      return transformed;
    } catch (err) {
      const errorMessage = err instanceof Error ? err.message : '데이터 로딩 실패';
      setError(errorMessage);
      console.error('MonthlyExpenseDetail API Error:', err);
      return null;
    } finally {
      setLoading(false);
    }
  }, []);

  return { modalConfig, loading, error, fetchData };
}

// ============================================
// 통합 Dashboard Hook (선택적 사용)
// ============================================

export interface UseCEODashboardOptions {
  /** DailyReport 섹션 활성화 */
  dailyReport?: boolean;
  /** Receivable 섹션 활성화 */
  receivable?: boolean;
  /** DebtCollection 섹션 활성화 */
  debtCollection?: boolean;
  /** MonthlyExpense 섹션 활성화 */
  monthlyExpense?: boolean;
  /** CardManagement 섹션 활성화 */
  cardManagement?: boolean;
   /** CardManagement fallback 데이터 (가지급금, 법인세, 종합세 등) */
  cardManagementFallback?: CardManagementData;
  /** StatusBoard 섹션 활성화 */
  statusBoard?: boolean;
}

export interface CEODashboardState {
  dailyReport: {
    data: DailyReportData | null;
    loading: boolean;
    error: string | null;
  };
  receivable: {
    data: ReceivableData | null;
    loading: boolean;
    error: string | null;
  };
  debtCollection: {
    data: DebtCollectionData | null;
    loading: boolean;
    error: string | null;
  };
  monthlyExpense: {
    data: MonthlyExpenseData | null;
    loading: boolean;
    error: string | null;
  };
  cardManagement: {
    data: CardManagementData | null;
    loading: boolean;
    error: string | null;
  };
  statusBoard: {
    data: TodayIssueItem[] | null;
    loading: boolean;
    error: string | null;
  };
  refetchAll: () => void;
}

/**
 * 통합 CEO Dashboard Hook
 * 여러 섹션의 API를 병렬로 호출하여 성능 최적화
 */
export function useCEODashboard(options: UseCEODashboardOptions = {}): CEODashboardState {
  const {
    dailyReport: enableDailyReport = true,
    receivable: enableReceivable = true,
    debtCollection: enableDebtCollection = true,
    monthlyExpense: enableMonthlyExpense = true,
    cardManagement: enableCardManagement = true,
    cardManagementFallback,
    statusBoard: enableStatusBoard = true,
  } = options;

  // 각 섹션별 상태
  const [dailyReportData, setDailyReportData] = useState<DailyReportData | null>(null);
  const [dailyReportLoading, setDailyReportLoading] = useState(enableDailyReport);
  const [dailyReportError, setDailyReportError] = useState<string | null>(null);

  const [receivableData, setReceivableData] = useState<ReceivableData | null>(null);
  const [receivableLoading, setReceivableLoading] = useState(enableReceivable);
  const [receivableError, setReceivableError] = useState<string | null>(null);

  const [debtCollectionData, setDebtCollectionData] = useState<DebtCollectionData | null>(null);
  const [debtCollectionLoading, setDebtCollectionLoading] = useState(enableDebtCollection);
  const [debtCollectionError, setDebtCollectionError] = useState<string | null>(null);

  const [monthlyExpenseData, setMonthlyExpenseData] = useState<MonthlyExpenseData | null>(null);
  const [monthlyExpenseLoading, setMonthlyExpenseLoading] = useState(enableMonthlyExpense);
  const [monthlyExpenseError, setMonthlyExpenseError] = useState<string | null>(null);

  const [cardManagementData, setCardManagementData] = useState<CardManagementData | null>(null);
  const [cardManagementLoading, setCardManagementLoading] = useState(enableCardManagement);
  const [cardManagementError, setCardManagementError] = useState<string | null>(null);

  const [statusBoardData, setStatusBoardData] = useState<TodayIssueItem[] | null>(null);
  const [statusBoardLoading, setStatusBoardLoading] = useState(enableStatusBoard);
  const [statusBoardError, setStatusBoardError] = useState<string | null>(null);

  // 개별 fetch 함수들
  const fetchDailyReport = useCallback(async () => {
    if (!enableDailyReport) return;
    try {
      setDailyReportLoading(true);
      setDailyReportError(null);
      const apiData = await fetchApi<DailyReportApiResponse>('daily-report/summary');
      setDailyReportData(transformDailyReportResponse(apiData));
    } catch (err) {
      setDailyReportError(err instanceof Error ? err.message : '데이터 로딩 실패');
    } finally {
      setDailyReportLoading(false);
    }
  }, [enableDailyReport]);

  const fetchReceivable = useCallback(async () => {
    if (!enableReceivable) return;
    try {
      setReceivableLoading(true);
      setReceivableError(null);
      const apiData = await fetchApi<ReceivablesApiResponse>('receivables/summary');
      setReceivableData(transformReceivableResponse(apiData));
    } catch (err) {
      setReceivableError(err instanceof Error ? err.message : '데이터 로딩 실패');
    } finally {
      setReceivableLoading(false);
    }
  }, [enableReceivable]);

  const fetchDebtCollection = useCallback(async () => {
    if (!enableDebtCollection) return;
    try {
      setDebtCollectionLoading(true);
      setDebtCollectionError(null);
      const apiData = await fetchApi<BadDebtApiResponse>('bad-debts/summary');
      setDebtCollectionData(transformDebtCollectionResponse(apiData));
    } catch (err) {
      setDebtCollectionError(err instanceof Error ? err.message : '데이터 로딩 실패');
    } finally {
      setDebtCollectionLoading(false);
    }
  }, [enableDebtCollection]);

  const fetchMonthlyExpense = useCallback(async () => {
    if (!enableMonthlyExpense) return;
    try {
      setMonthlyExpenseLoading(true);
      setMonthlyExpenseError(null);
      const apiData = await fetchApi<ExpectedExpenseApiResponse>('expected-expenses/summary');
      setMonthlyExpenseData(transformMonthlyExpenseResponse(apiData));
    } catch (err) {
      setMonthlyExpenseError(err instanceof Error ? err.message : '데이터 로딩 실패');
    } finally {
      setMonthlyExpenseLoading(false);
    }
  }, [enableMonthlyExpense]);

  const fetchCardManagement = useCallback(async () => {
    if (!enableCardManagement) return;
    try {
      setCardManagementLoading(true);
      setCardManagementError(null);

      // 3개 API 병렬 호출: 카드거래, 가지급금, 세금 시뮬레이션
      const [cardApiData, loanResponse, taxResponse] = await Promise.all([
        fetchApi<CardTransactionApiResponse>('card-transactions/summary'),
        fetchLoanDashboard(),
        fetchTaxSimulation(),
      ]);

      // LoanDashboard와 TaxSimulation은 ApiResponse wrapper가 있으므로 data 추출
      const loanData = loanResponse.success ? loanResponse.data : null;
      const taxData = taxResponse.success ? taxResponse.data : null;

      setCardManagementData(
        transformCardManagementResponse(cardApiData, loanData, taxData, cardManagementFallback)
      );
    } catch (err) {
      setCardManagementError(err instanceof Error ? err.message : '데이터 로딩 실패');
    } finally {
      setCardManagementLoading(false);
    }
  }, [enableCardManagement, cardManagementFallback]);

  const fetchStatusBoard = useCallback(async () => {
    if (!enableStatusBoard) return;
    try {
      setStatusBoardLoading(true);
      setStatusBoardError(null);
      const apiData = await fetchApi<StatusBoardApiResponse>('status-board/summary');
      setStatusBoardData(transformStatusBoardResponse(apiData));
    } catch (err) {
      setStatusBoardError(err instanceof Error ? err.message : '데이터 로딩 실패');
    } finally {
      setStatusBoardLoading(false);
    }
  }, [enableStatusBoard]);

  // 전체 refetch
  const refetchAll = useCallback(() => {
    fetchDailyReport();
    fetchReceivable();
    fetchDebtCollection();
    fetchMonthlyExpense();
    fetchCardManagement();
    fetchStatusBoard();
  }, [fetchDailyReport, fetchReceivable, fetchDebtCollection, fetchMonthlyExpense, fetchCardManagement, fetchStatusBoard]);

  // 초기 로드
  useEffect(() => {
    refetchAll();
  }, [refetchAll]);

  return {
    dailyReport: {
      data: dailyReportData,
      loading: dailyReportLoading,
      error: dailyReportError,
    },
    receivable: {
      data: receivableData,
      loading: receivableLoading,
      error: receivableError,
    },
    debtCollection: {
      data: debtCollectionData,
      loading: debtCollectionLoading,
      error: debtCollectionError,
    },
    monthlyExpense: {
      data: monthlyExpenseData,
      loading: monthlyExpenseLoading,
      error: monthlyExpenseError,
    },
    cardManagement: {
      data: cardManagementData,
      loading: cardManagementLoading,
      error: cardManagementError,
    },
    statusBoard: {
      data: statusBoardData,
      loading: statusBoardLoading,
      error: statusBoardError,
    },
    refetchAll,
  };
}