/**
 * 스케줄 API
 */
import { fetchApi, fetchAuthApi, fetchFormData } from './client';
import { getTodayKST } from '@/utils';

/**
 * API 응답을 플랫 배열로 변환
 * 백엔드가 날짜별 그룹화된 객체를 반환하므로 변환 필요
 */
function flattenScheduleResponse(data) {
  const schedules = [];
  for (const [date, dayData] of Object.entries(data)) {
    for (const schedule of dayData.schedules || []) {
      const category = schedule.category || {};
      schedules.push({
        ...schedule,
        date,
        category_id: category.id,
        category_name: category.name,
        category_color: category.color,
      });
    }
  }
  return schedules;
}

// ==================== 공개 API ====================

/**
 * 스케줄 목록 조회 (월별)
 */
export async function getSchedules(year, month) {
  const data = await fetchApi(`/schedules?year=${year}&month=${month}`);
  return flattenScheduleResponse(data);
}

/**
 * 다가오는 스케줄 조회
 */
export async function getUpcomingSchedules(limit = 3) {
  const today = getTodayKST();
  const data = await fetchApi(`/schedules?startDate=${today}&limit=${limit}`);
  return flattenScheduleResponse(data);
}

/**
 * 스케줄 검색 (Meilisearch)
 */
export async function searchSchedules(query, { offset = 0, limit = 20 } = {}) {
  return fetchApi(
    `/schedules?search=${encodeURIComponent(query)}&offset=${offset}&limit=${limit}`
  );
}

/**
 * 스케줄 상세 조회
 */
export async function getSchedule(id) {
  return fetchApi(`/schedules/${id}`);
}

/**
 * X 프로필 정보 조회
 */
export async function getXProfile(username) {
  return fetchApi(`/schedules/x-profile/${encodeURIComponent(username)}`);
}

/**
 * 카테고리 목록 조회
 */
export async function getCategories() {
  return fetchApi('/schedules/categories');
}

// ==================== 어드민 API ====================

/**
 * [Admin] 스케줄 검색
 */
export async function adminSearchSchedules(query) {
  return fetchAuthApi(`/admin/schedules/search?q=${encodeURIComponent(query)}`);
}

/**
 * [Admin] 스케줄 상세 조회
 */
export async function adminGetSchedule(id) {
  return fetchAuthApi(`/admin/schedules/${id}`);
}

/**
 * [Admin] 스케줄 생성
 */
export async function createSchedule(formData) {
  return fetchFormData('/admin/schedules', formData, 'POST');
}

/**
 * [Admin] 스케줄 수정
 */
export async function updateSchedule(id, formData) {
  return fetchFormData(`/admin/schedules/${id}`, formData, 'PUT');
}

/**
 * [Admin] 스케줄 삭제
 */
export async function deleteSchedule(id) {
  return fetchAuthApi(`/schedules/${id}`, { method: 'DELETE' });
}

// ==================== 카테고리 어드민 API ====================

/**
 * [Admin] 카테고리 생성
 */
export async function createCategory(data) {
  return fetchAuthApi('/admin/schedule-categories', {
    method: 'POST',
    body: JSON.stringify(data),
  });
}

/**
 * [Admin] 카테고리 수정
 */
export async function updateCategory(id, data) {
  return fetchAuthApi(`/admin/schedule-categories/${id}`, {
    method: 'PUT',
    body: JSON.stringify(data),
  });
}

/**
 * [Admin] 카테고리 삭제
 */
export async function deleteCategory(id) {
  return fetchAuthApi(`/admin/schedule-categories/${id}`, { method: 'DELETE' });
}

/**
 * [Admin] 카테고리 순서 변경
 */
export async function reorderCategories(orders) {
  return fetchAuthApi('/admin/schedule-categories-order', {
    method: 'PUT',
    body: JSON.stringify({ orders }),
  });
}