import React, { useEffect, useState } from 'react';
import { Form, Label, Popup, Pagination } from 'semantic-ui-react';
import { Link } from 'react-router-dom';
import { API, copy, showError, showInfo, showSuccess, showWarning, timestamp2string } from '../helpers';

import { ITEMS_PER_PAGE } from '../constants';
import { renderQuota } from '../helpers/render';
import {Button, Modal, Popconfirm, Popover, Table, Tag} from "@douyinfe/semi-ui";

function renderTimestamp(timestamp) {
  return (
    <>
      {timestamp2string(timestamp)}
    </>
  );
}

function renderStatus(status) {
  switch (status) {
    case 1:
      return <Tag color='green' size='large'>未使用</Tag>;
    case 2:
      return <Tag color='red' size='large'> 已禁用 </Tag>;
    case 3:
      return <Tag color='grey' size='large'> 已使用 </Tag>;
    default:
      return <Tag color='black' size='large'> 未知状态 </Tag>;
  }
}

const RedemptionsTable = () => {
  const columns = [
    {
      title: 'ID',
      dataIndex: 'id',
    },
    {
      title: '名称',
      dataIndex: 'name',
    },
    {
      title: '状态',
      dataIndex: 'status',
      key: 'status',
      render: (text, record, index) => {
        return (
            <div>
              {renderStatus(text)}
            </div>
        );
      },
    },
    {
      title: '额度',
      dataIndex: 'quota',
      render: (text, record, index) => {
        return (
            <div>
              {renderQuota(parseInt(text))}
            </div>
        );
      },
    },
    {
      title: '创建时间',
      dataIndex: 'created_time',
      render: (text, record, index) => {
        return (
            <div>
              {renderTimestamp(text)}
            </div>
        );
      },
    },
    {
      title: '',
      dataIndex: 'operate',
      render: (text, record, index) => (
          <div>
            <Popover
                content={
                    record.key
                }
                style={{padding: 20}}
                position="top"
            >
              <Button theme='light' type='tertiary' style={{marginRight: 1}}>查看</Button>
            </Popover>
            <Button theme='light' type='secondary' style={{marginRight: 1}}
                    onClick={async (text) => {
                      await copyText(record.key)
                    }}
            >复制</Button>
            <Popconfirm
                title="确定是否要删除此令牌？"
                content="此修改将不可逆"
                okType={'danger'}
                position={'left'}
                onConfirm={() => {
                  manageRedemption(record.id, 'delete', record).then(
                      () => {
                        removeRecord(record.key);
                      }
                  )
                }}
            >
              <Button theme='light' type='danger' style={{marginRight: 1}}>删除</Button>
            </Popconfirm>
            {
              record.status === 1 ?
                  <Button theme='light' type='warning' style={{marginRight: 1}} onClick={
                    async () => {
                      manageRedemption(
                          record.id,
                          'disable',
                          record
                      )
                    }
                  }>禁用</Button> :
                  <Button theme='light' type='secondary' style={{marginRight: 1}} onClick={
                    async () => {
                      manageRedemption(
                          record.id,
                          'enable',
                          record
                      );
                    }
                  } disabled={record.status===3}>启用</Button>
            }
            {/*<Button theme='light' type='tertiary' style={{marginRight: 1}} onClick={*/}
            {/*  () => {*/}
            {/*    setEditingToken(record);*/}
            {/*    setShowEdit(true);*/}
            {/*  }*/}
            {/*}>编辑</Button>*/}
          </div>
      ),
    },
  ];

  const [redemptions, setRedemptions] = useState([]);
  const [loading, setLoading] = useState(true);
  const [activePage, setActivePage] = useState(1);
  const [searchKeyword, setSearchKeyword] = useState('');
  const [searching, setSearching] = useState(false);
  const [tokenCount, setTokenCount] = useState(ITEMS_PER_PAGE);
  const [selectedKeys, setSelectedKeys] = useState([]);

  const loadRedemptions = async (startIdx) => {
    const res = await API.get(`/api/redemption/?p=${startIdx}`);
    const { success, message, data } = res.data;
    if (success) {
      if (startIdx === 0) {
        setRedemptions(data);
      } else {
        let newRedemptions = redemptions;
        newRedemptions.push(...data);
        setRedemptions(newRedemptions);
      }
    } else {
      showError(message);
    }
    setLoading(false);
  };

  const removeRecord = key => {
    let newDataSource = [...redemptions];
    if (key != null) {
      let idx = newDataSource.findIndex(data => data.key === key);

      if (idx > -1) {
        newDataSource.splice(idx, 1);
        setRedemptions(newDataSource);
      }
    }
  };

  const copyText = async (text) => {
    if (await copy(text)) {
      showSuccess('已复制到剪贴板！');
    } else {
      // setSearchKeyword(text);
      Modal.error({ title: '无法复制到剪贴板，请手动复制', content: text });
    }
  }

  const onPaginationChange = (e, { activePage }) => {
    (async () => {
      if (activePage === Math.ceil(redemptions.length / ITEMS_PER_PAGE) + 1) {
        // In this case we have to load more data and then append them.
        await loadRedemptions(activePage - 1);
      }
      setActivePage(activePage);
    })();
  };

  useEffect(() => {
    loadRedemptions(0)
      .then()
      .catch((reason) => {
        showError(reason);
      });
  }, []);

  const manageRedemption = async (id, action, record) => {
    let data = { id };
    let res;
    switch (action) {
      case 'delete':
        res = await API.delete(`/api/redemption/${id}/`);
        break;
      case 'enable':
        data.status = 1;
        res = await API.put('/api/redemption/?status_only=true', data);
        break;
      case 'disable':
        data.status = 2;
        res = await API.put('/api/redemption/?status_only=true', data);
        break;
    }
    const { success, message } = res.data;
    if (success) {
      showSuccess('操作成功完成！');
      let redemption = res.data.data;
      let newRedemptions = [...redemptions];
      // let realIdx = (activePage - 1) * ITEMS_PER_PAGE + idx;
      if (action === 'delete') {

      } else {
        record.status = redemption.status;
      }
      setRedemptions(newRedemptions);
    } else {
      showError(message);
    }
  };

  const searchRedemptions = async () => {
    if (searchKeyword === '') {
      // if keyword is blank, load files instead.
      await loadRedemptions(0);
      setActivePage(1);
      return;
    }
    setSearching(true);
    const res = await API.get(`/api/redemption/search?keyword=${searchKeyword}`);
    const { success, message, data } = res.data;
    if (success) {
      setRedemptions(data);
      setActivePage(1);
    } else {
      showError(message);
    }
    setSearching(false);
  };

  const handleKeywordChange = async (e, { value }) => {
    setSearchKeyword(value.trim());
  };

  const sortRedemption = (key) => {
    if (redemptions.length === 0) return;
    setLoading(true);
    let sortedRedemptions = [...redemptions];
    sortedRedemptions.sort((a, b) => {
      return ('' + a[key]).localeCompare(b[key]);
    });
    if (sortedRedemptions[0].id === redemptions[0].id) {
      sortedRedemptions.reverse();
    }
    setRedemptions(sortedRedemptions);
    setLoading(false);
  };

  const handlePageChange = page => {
    setActivePage(page);
    if (page === Math.ceil(redemptions.length / ITEMS_PER_PAGE) + 1) {
      // In this case we have to load more data and then append them.
      loadRedemptions(page - 1).then(r => {});
    }
  };

  let pageData = redemptions.slice((activePage - 1) * ITEMS_PER_PAGE, activePage * ITEMS_PER_PAGE);
  const rowSelection = {
    onSelect: (record, selected) => {
    },
    onSelectAll: (selected, selectedRows) => {
    },
    onChange: (selectedRowKeys, selectedRows) => {
      setSelectedKeys(selectedRows);
    },
  };

  return (
    <>
      <Form onSubmit={searchRedemptions}>
        <Form.Input
          icon='search'
          fluid
          iconPosition='left'
          placeholder='搜索兑换码的 ID 和名称 ...'
          value={searchKeyword}
          loading={searching}
          onChange={handleKeywordChange}
        />
      </Form>

      <Table style={{marginTop: 20}} columns={columns} dataSource={pageData} pagination={{
        currentPage: activePage,
        pageSize: ITEMS_PER_PAGE,
        total: tokenCount,
        // showSizeChanger: true,
        // pageSizeOptions: [10, 20, 50, 100],
        formatPageText: (page) => `第 ${page.currentStart} - ${page.currentEnd} 条，共 ${redemptions.length} 条`,
        // onPageSizeChange: (size) => {
        //   setPageSize(size);
        //   setActivePage(1);
        // },
        onPageChange: handlePageChange,
      }} loading={loading} rowSelection={rowSelection}>
      </Table>
    </>
  );
};

export default RedemptionsTable;