import { useEffect, useState } from 'react';
import { Table, Button, Card, Row, Col, Statistic, message, Tag, Popconfirm, Space, Typography, Input, theme, Dropdown } from 'antd';
import { DownloadOutlined, DeleteOutlined, CopyOutlined, SearchOutlined } from '@ant-design/icons';
import { cookieApi } from '../api/modules';
import { getUser, hasPerm } from '../store/auth';
import { formatTime } from '../utils/time';

const { Text } = Typography;

export default function CookiePage() {
  const { token } = theme.useToken();
  const [cookies, setCookies] = useState<any[]>([]);
  const [loading, setLoading] = useState(false);
  const [selectedRowKeys, setSelectedRowKeys] = useState<React.Key[]>([]);
  const [searchText, setSearchText] = useState('');
  const user = getUser();

  const canView = hasPerm(user, 'cookie:view');
  const canExport = hasPerm(user, 'cookie:export');

  const loadCookies = async () => {
    setLoading(true);
    try {
      const data = await cookieApi.list();
      setCookies(data);
    } catch (e: any) {
      message.error(e.message);
    } finally {
      setLoading(false);
    }
  };

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

  const handleExport = async (format: string = 'csv') => {
    try {
      const blob = await cookieApi.exportCsv(format);
      const url = URL.createObjectURL(blob instanceof Blob ? blob : new Blob([blob as any]));
      const a = document.createElement('a');
      a.href = url;
      a.download = format === 'custom' ? 'cookies_custom.txt' : 'cookies.csv';
      a.click();
      URL.revokeObjectURL(url);
      message.success('已导出');
    } catch (e: any) {
      message.error(e.message);
    }
  };

  const handleCopyCookie = (cookie: string, username: string) => {
    if (!cookie) {
      message.warning('Cookie 为空');
      return;
    }
    navigator.clipboard.writeText(cookie).then(() => {
      message.success(`已复制 ${username} 的 Cookie`);
    }).catch(() => {
      message.error('复制失败');
    });
  };

  const handleCopySelected = () => {
    if (selectedRowKeys.length === 0) {
      message.warning('请先选择 Cookie');
      return;
    }
    const selected = cookies.filter((c) => selectedRowKeys.includes(c.id));
    const text = selected
      .map((c) => `${c.account_username}: ${c.cookie || '(空)'}`)
      .join('\n');
    navigator.clipboard.writeText(text).then(() => {
      message.success(`已复制 ${selected.length} 条 Cookie`);
    }).catch(() => {
      message.error('复制失败');
    });
  };

  const handleDelete = async (id: number) => {
    try {
      await cookieApi.delete(id);
      message.success('已删除');
      setSelectedRowKeys((prev) => prev.filter((k) => k !== id));
      loadCookies();
    } catch (e: any) {
      message.error(e.message);
    }
  };

  // 筛选
  const filteredCookies = cookies.filter((c) => {
    if (!searchText) return true;
    const s = searchText.toLowerCase();
    return (
      c.account_username?.toLowerCase().includes(s) ||
      c.assigned_username?.toLowerCase().includes(s)
    );
  });

  const columns: any[] = [
    { title: 'ID', dataIndex: 'id', width: 60, align: 'center' },
    {
      title: '账号',
      dataIndex: 'account_username',
      width: 140,
      ellipsis: true,
    },
    {
      title: '分配',
      dataIndex: 'assigned_username',
      width: 100,
      align: 'center',
      render: (name: string | null) =>
        name ? <Tag color="green">{name}</Tag> : <Text type="secondary" style={{ fontSize: 12 }}>未分配</Text>,
    },
    {
      title: 'Cookie',
      dataIndex: 'cookie_preview',
      ellipsis: true,
      render: (val: string) => {
        if (!canView) return <Tag>***</Tag>;
        return <span style={{ fontFamily: 'monospace', fontSize: 12 }}>{val}</span>;
      },
    },
    {
      title: '时间',
      dataIndex: 'created_at',
      width: 180,
      align: 'center',
      render: (val: string) => formatTime(val),
    },
    {
      title: '操作',
      width: 130,
      align: 'center',
      fixed: 'right',
      render: (_: any, record: any) => (
        <Space size={4}>
          <Button
            size="small"
            icon={<CopyOutlined />}
            onClick={() => handleCopyCookie(record.cookie, record.account_username)}
          >
            复制
          </Button>
          {canExport && (
            <Popconfirm title="确认删除？" onConfirm={() => handleDelete(record.id)}>
              <Button danger size="small" icon={<DeleteOutlined />} />
            </Popconfirm>
          )}
        </Space>
      ),
    },
  ];

  const assignedCount = cookies.filter((c) => c.assigned_to).length;
  const unassignedCount = cookies.length - assignedCount;

  return (
    <div>
      <div style={{ marginBottom: 16, display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
        <h2 style={{ margin: 0 }}>Cookie 管理</h2>
        <Space>
          <Button
            icon={<CopyOutlined />}
            onClick={handleCopySelected}
            disabled={selectedRowKeys.length === 0}
          >
            复制选中 {selectedRowKeys.length > 0 && `(${selectedRowKeys.length})`}
          </Button>
          {canExport && (
            <Dropdown
              menu={{
                items: [
                  { key: 'csv', label: 'CSV（账号, Cookie, 时间）', onClick: () => handleExport('csv') },
                  { key: 'custom', label: '自定义（账号----密码----ck）', onClick: () => handleExport('custom') },
                ],
              }}
            >
              <Button type="primary" icon={<DownloadOutlined />}>
                导出
              </Button>
            </Dropdown>
          )}
        </Space>
      </div>
      <Row gutter={12} style={{ marginBottom: 16 }}>
        <Col span={6}>
          <Card size="small"><Statistic title="Cookie 总数" value={cookies.length} /></Card>
        </Col>
        <Col span={6}>
          <Card size="small">
            <Statistic
              title="已分配"
              value={assignedCount}
              valueStyle={{ color: token.colorSuccess }}
            />
          </Card>
        </Col>
        <Col span={6}>
          <Card size="small">
            <Statistic
              title="未分配"
              value={unassignedCount}
              valueStyle={{ color: token.colorError }}
            />
          </Card>
        </Col>
      </Row>
      <div style={{ marginBottom: 12 }}>
        <Input.Search
          placeholder="搜索账号或分配客服"
          allowClear
          value={searchText}
          onChange={(e) => setSearchText(e.target.value)}
          style={{ width: 260 }}
          size="small"
          prefix={<SearchOutlined />}
        />
      </div>
      <Table
        rowSelection={{
          selectedRowKeys,
          onChange: (keys) => setSelectedRowKeys(keys),
        }}
        columns={columns}
        dataSource={filteredCookies}
        rowKey="id"
        loading={loading}
        size="small"
        pagination={{ pageSize: 20, showSizeChanger: true, showTotal: (t) => `共 ${t} 条` }}
        scroll={{ x: 900 }}
      />
    </div>
  );
}