import request from '@/utils/request';
import axios from 'axios';
import { Loading } from 'element-ui';

const baseUrl = '/aps/factory/calendar';
const pendingRequests = {};
let loadingInstance = null;
let loadingCount = 0;

function showLoading(text = '加载中...') {
  loadingCount += 1;
  if (!loadingInstance) {
    loadingInstance = Loading.service({
      lock: true,
      text,
      spinner: 'el-icon-loading',
      background: 'rgba(255, 255, 255, 0.68)',
      customClass: 'factory-calendar-loading'
    });
  } else {
    loadingInstance.text = text;
  }
}

function hideLoading() {
  loadingCount = Math.max(loadingCount - 1, 0);
  if (!loadingCount && loadingInstance) {
    loadingInstance.close();
    loadingInstance = null;
  }
}

async function requestWithLoading(requestFactory, text) {
  showLoading(text);
  try {
    return await requestFactory();
  } finally {
    hideLoading();
  }
}

function onceRequest(key, requestFactory) {
  if (pendingRequests[key]) {
    return pendingRequests[key];
  }
  pendingRequests[key] = requestFactory().finally(() => {
    delete pendingRequests[key];
  });
  return pendingRequests[key];
}

function normalizeTimeValue(value) {
  if (typeof value !== 'string' || !/^\d{2}:\d{2}$/.test(value)) {
    return value;
  }
  return `${value}:00`;
}

function normalizeDateTimeValue(value) {
  if (typeof value !== 'string') {
    return value;
  }
  if (/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}$/.test(value)) {
    return value.replace('T', ' ');
  }
  if (/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}$/.test(value)) {
    return `${value}:00`;
  }
  return value;
}

function normalizeTimePayload(data) {
  if (Array.isArray(data)) {
    return data.map((item) => normalizeTimePayload(item));
  }
  if (
    !data ||
    typeof data !== 'object' ||
    Object.prototype.toString.call(data) !== '[object Object]'
  ) {
    return data;
  }
  return Object.keys(data).reduce((next, key) => {
    const value = data[key];
    if (key === 'startTime' || key === 'endTime') {
      next[key] = normalizeTimeValue(value);
    } else if (key === 'effectiveTime' || key === 'expireTime') {
      next[key] = normalizeDateTimeValue(value);
    } else {
      next[key] = normalizeTimePayload(value);
    }
    return next;
  }, {});
}

function normalizeSegmentContent(data) {
  if (!data || typeof data.newContent !== 'string') {
    return data;
  }
  try {
    const parsed = JSON.parse(data.newContent);
    return {
      ...data,
      newContent: JSON.stringify(normalizeTimePayload(parsed))
    };
  } catch (e) {
    return data;
  }
}

function normalizeRequestData(data) {
  return normalizeSegmentContent(normalizeTimePayload(data));
}

function unwrap(res) {
  if (res.data.code == 0) {
    return res.data.data;
  }
  return Promise.reject(new Error(res.data.message));
}

export async function addCalendar(data) {
  const res = await requestWithLoading(
    () => request.post(`${baseUrl}/add`, normalizeRequestData(data)),
    '保存日历中...'
  );
  return unwrap(res);
}

export async function editCalendar(data) {
  const res = await requestWithLoading(
    () => request.put(`${baseUrl}/edit`, normalizeRequestData(data)),
    '保存日历中...'
  );
  return unwrap(res);
}

export async function deleteCalendar(data) {
  const res = await requestWithLoading(
    () => request.delete(`${baseUrl}/delete`, { data }),
    '删除日历中...'
  );
  return unwrap(res);
}

export async function updateCalendarStatus(data) {
  const res = await requestWithLoading(
    () => request.put(`${baseUrl}/status`, data),
    '同步状态中...'
  );
  return unwrap(res);
}

export async function pageCalendar(params) {
  const res = await requestWithLoading(
    () => request.get(`${baseUrl}/list`, { params }),
    '加载日历数据中...'
  );
  return unwrap(res);
}

export async function copyCalendar(data) {
  const res = await requestWithLoading(
    () => request.post(`${baseUrl}/copy`, data),
    '复制日历中...'
  );
  return unwrap(res);
}

export async function exportCalendarList(params) {
  const res = await requestWithLoading(
    () => request.get(`${baseUrl}/batch/export`, { params }),
    '导出日历中...'
  );
  return unwrap(res);
}

export async function viewCalendar(params) {
  const res = await requestWithLoading(
    () => request.get(`${baseUrl}/view`, { params }),
    '加载日历视图中...'
  );
  return unwrap(res);
}

export async function saveCalendarDetail(data) {
  const res = await requestWithLoading(
    () => request.post(`${baseUrl}/detail/save`, normalizeRequestData(data)),
    '保存时段明细中...'
  );
  return unwrap(res);
}

export async function checkCalendarConflict(data) {
  const payload = normalizeRequestData(data);
  const res = await requestWithLoading(
    () =>
      onceRequest(`conflict-check:${JSON.stringify(payload)}`, () =>
        request.post(`${baseUrl}/conflict/check`, payload)
      ),
    '检测冲突中...'
  );
  return unwrap(res);
}

export async function checkAllCalendarConflict(params) {
  const payload = normalizeRequestData(params);
  const res = await requestWithLoading(
    () =>
      onceRequest(`conflict-all:${JSON.stringify(payload)}`, () =>
        request.get(`${baseUrl}/conflict/all`, { params: payload })
      ),
    '年度冲突检测中...'
  );
  return unwrap(res);
}

export async function applyCalendarAdjust(data) {
  const res = await requestWithLoading(
    () => request.post(`${baseUrl}/adjust/apply`, normalizeRequestData(data)),
    '提交调整申请中...'
  );
  return unwrap(res);
}

export async function approveCalendarAdjust(data) {
  const res = await requestWithLoading(
    () => request.put(`${baseUrl}/adjust/approve`, data),
    '审批处理中...'
  );
  return unwrap(res);
}

export async function pageCalendarAdjust(params) {
  const res = await requestWithLoading(
    () => request.get(`${baseUrl}/adjust/list`, { params }),
    '加载调整申请中...'
  );
  return unwrap(res);
}

export async function getPlanRelation(params) {
  const res = await requestWithLoading(
    () =>
      request.get(`${baseUrl}/plan/relation`, {
        params: normalizeRequestData(params)
      }),
    '加载关联计划中...'
  );
  return unwrap(res);
}

export async function refreshCalendarPlan(data) {
  const res = await requestWithLoading(
    () => request.post(`${baseUrl}/plan/refresh`, data),
    '刷新关联计划中...'
  );
  return unwrap(res);
}

export async function getMonthStat(params) {
  const res = await requestWithLoading(
    () => request.get(`${baseUrl}/stat/month`, { params }),
    '加载统计数据中...'
  );
  return unwrap(res);
}

export async function getPublicLegalHolidays(year) {
  const res = await axios.get(
    `https://api.jiejiariapi.com/v1/holidays/${year}`,
    {
      timeout: 8000
    }
  );
  return res.data;
}