import React, {useEffect, useState} from 'react';
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, Form} from "@douyinfe/semi-ui";
import EditRedemption from "../pages/Redemption/EditRedemption";

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: '兑换人ID',
            dataIndex: 'used_user_id',
            render: (text, record, index) => {
                return (
                    <div>
                        {text === 0 ? '无' : 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="确定是否要删除此兑换码？"
                        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={
                        () => {
                            setEditingRedemption(record);
                            setShowEdit(true);
                        }
                    } disabled={record.status !== 1}>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 [editingRedemption, setEditingRedemption] = useState({
        id: undefined,
    });
    const [showEdit, setShowEdit] = useState(false);

    const closeEdit = () => {
        setShowEdit(false);
    }

    // const setCount = (data) => {
    //     if (data.length >= (activePage) * ITEMS_PER_PAGE) {
    //         setTokenCount(data.length + 1);
    //     } else {
    //         setTokenCount(data.length);
    //     }
    // }

    const setRedemptionFormat = (redeptions) => {
        // for (let i = 0; i < redeptions.length; i++) {
        //     redeptions[i].key = '' + redeptions[i].id;
        // }
        // data.key = '' + data.id
        setRedemptions(redeptions);
        if (redeptions.length >= (activePage) * ITEMS_PER_PAGE) {
            setTokenCount(redeptions.length + 1);
        } else {
            setTokenCount(redeptions.length);
        }
    }

    const loadRedemptions = async (startIdx) => {
        const res = await API.get(`/api/redemption/?p=${startIdx}`);
        const {success, message, data} = res.data;
        if (success) {
            if (startIdx === 0) {
                setRedemptionFormat(data);
            } else {
                let newRedemptions = redemptions;
                newRedemptions.push(...data);
                setRedemptionFormat(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 refresh = async () => {
        await loadRedemptions(activePage - 1);
    };

    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 (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);
        },
    };

    const handleRow = (record, index) => {
        if (record.status !== 1) {
            return {
                style: {
                    background: 'var(--semi-color-disabled-border)',
                },
            };
        } else {
            return {};
        }
    };

    return (
        <>
            <EditRedemption refresh={refresh} editingRedemption={editingRedemption} visiable={showEdit}
                            handleClose={closeEdit}></EditRedemption>
            <Form onSubmit={searchRedemptions}>
                <Form.Input
                    label='搜索关键字'
                    field='keyword'
                    icon='search'
                    iconPosition='left'
                    placeholder='关键字(id或者名称)'
                    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} onRow={handleRow}>
            </Table>
            <Button theme='light' type='primary' style={{marginRight: 8}} onClick={
                () => {
                    setEditingRedemption({
                        id: undefined,
                    });
                    setShowEdit(true);
                }
            }>添加兑换码</Button>
            <Button label='复制所选兑换码' type="warning" onClick={
                async () => {
                    if (selectedKeys.length === 0) {
                        showError('请至少选择一个兑换码！');
                        return;
                    }
                    let keys = "";
                    for (let i = 0; i < selectedKeys.length; i++) {
                        keys += selectedKeys[i].name + "    " + selectedKeys[i].key + "\n";
                    }
                    await copyText(keys);
                }
            }>复制所选兑换码到剪贴板</Button>
        </>
    );
};

export default RedemptionsTable;