import { useState, useCallback } from 'react';
import {
  Table,
  Button,
  Space,
  Form,
  Input,
  Tag,
  Drawer,
  Modal,
  Badge,
  Typography,
  message,
  Tooltip,
} from 'antd';
import {
  PlusOutlined,
  CopyOutlined,
  TeamOutlined,
  UserOutlined,
  ReloadOutlined,
} from '@ant-design/icons';
import { classApi } from '../../api/diary/classes';
import type { SchoolClass, ClassMember } from '../../api/diary/types';
import { PageContainer } from '../../components/PageContainer';
import { DrawerForm } from '../../components/DrawerForm';
import { useCrudDrawer } from '../../hooks/useCrudDrawer';
import { usePaginatedData } from '../../hooks/usePaginatedData';
import { useApiRequest } from '../../hooks/useApiRequest';
import { useThemeMode } from '../../hooks/useThemeMode';

const { Text } = Typography;

export default function ClassList() {
  const isDark = useThemeMode();
  const { execute } = useApiRequest();

  const {
    data: classes,
    total,
    page,
    loading,
    refresh,
  } = usePaginatedData<SchoolClass>(async (p, pageSize) => {
    const result = await classApi.list({ page: p, page_size: pageSize });
    return { data: result.data, total: result.total };
  }, 20);

  // --- Create/Edit drawer ---
  const classDrawer = useCrudDrawer<SchoolClass>({
    getId: (r) => r.id,
    onCreate: async (values) => {
      await classApi.create({ name: values.name as string, school_name: values.school_name as string | undefined });
    },
    onUpdate: async () => {
      // Class update API not yet available; refresh list silently
    },
    onSuccess: refresh,
  });

  // --- Member drawer ---
  const [memberDrawerOpen, setMemberDrawerOpen] = useState(false);
  const [memberClass, setMemberClass] = useState<SchoolClass | null>(null);
  const [members, setMembers] = useState<ClassMember[]>([]);
  const [membersLoading, setMembersLoading] = useState(false);

  const openMemberDrawer = useCallback(async (cls: SchoolClass) => {
    setMemberClass(cls);
    setMemberDrawerOpen(true);
    setMembersLoading(true);
    try {
      const result = await classApi.listMembers(cls.id);
      setMembers(result);
    } catch {
      message.error('加载班级成员失败');
      setMembers([]);
    } finally {
      setMembersLoading(false);
    }
  }, []);

  // --- Copy class code ---
  const handleCopyCode = useCallback((code: string) => {
    navigator.clipboard.writeText(code).then(
      () => message.success('班级码已复制'),
      () => message.error('复制失败，请手动复制'),
    );
  }, []);

  // --- Table columns ---
  const columns = [
    {
      title: '班级名称',
      dataIndex: 'name',
      key: 'name',
      render: (name: string, record: SchoolClass) => (
        <Button
          type="link"
          style={{ padding: 0, height: 'auto', fontWeight: 500, fontSize: 14 }}
          onClick={() => openMemberDrawer(record)}
        >
          {name}
        </Button>
      ),
    },
    {
      title: '学校',
      dataIndex: 'school_name',
      key: 'school_name',
      render: (v?: string) => v || <Text type="secondary">-</Text>,
    },
    {
      title: '班级码',
      dataIndex: 'class_code',
      key: 'class_code',
      width: 180,
      render: (code: string) => (
        <Space size={6}>
          <Text
            code
            style={{
              fontFamily: 'JetBrains Mono, Consolas, monospace',
              fontSize: 14,
              letterSpacing: 1,
            }}
          >
            {code}
          </Text>
          <Tooltip title="复制班级码">
            <Button
              type="text"
              size="small"
              icon={<CopyOutlined />}
              onClick={() => handleCopyCode(code)}
              style={{ color: isDark ? '#94a3b8' : '#475569' }}
            />
          </Tooltip>
        </Space>
      ),
    },
    {
      title: '成员数',
      dataIndex: 'member_count',
      key: 'member_count',
      width: 100,
      align: 'center' as const,
      render: (count: number) => (
        <Badge
          count={count}
          showZero
          style={{
            backgroundColor: isDark ? '#1f1f1f' : '#f0f0f0',
            color: isDark ? '#e0e0e0' : '#333',
            fontWeight: 500,
          }}
          overflowCount={9999}
        />
      ),
    },
    {
      title: '状态',
      dataIndex: 'is_active',
      key: 'is_active',
      width: 100,
      align: 'center' as const,
      render: (isActive: boolean) => (
        <Tag
          color={isActive ? 'success' : 'error'}
          style={{ fontWeight: 500, border: 'none' }}
        >
          {isActive ? '活跃' : '已停用'}
        </Tag>
      ),
    },
    {
      title: '教师',
      dataIndex: 'teacher_id',
      key: 'teacher_id',
      render: (teacherId: string) =>
        teacherId ? (
          <Space size={4}>
            <UserOutlined style={{ color: isDark ? '#94a3b8' : '#475569' }} />
            <Text type="secondary">{teacherId}</Text>
          </Space>
        ) : (
          <Text type="secondary">-</Text>
        ),
    },
    {
      title: '操作',
      key: 'actions',
      width: 120,
      render: (_: unknown, record: SchoolClass) => (
        <Space size={4}>
          <Tooltip title="查看成员">
            <Button
              size="small"
              type="text"
              icon={<TeamOutlined />}
              onClick={() => openMemberDrawer(record)}
              style={{ color: isDark ? '#94a3b8' : '#475569' }}
            />
          </Tooltip>
        </Space>
      ),
    },
  ];

  // --- Member table columns ---
  const memberColumns = [
    {
      title: '昵称',
      dataIndex: 'nickname',
      key: 'nickname',
      render: (v?: string) => v || <Text type="secondary">未设置</Text>,
    },
    {
      title: '角色',
      dataIndex: 'role',
      key: 'role',
      render: (role: string) => {
        const roleMap: Record<string, { label: string; color: string }> = {
          teacher: { label: '教师', color: 'blue' },
          student: { label: '学生', color: 'green' },
          parent: { label: '家长', color: 'orange' },
        };
        const info = roleMap[role] || { label: role, color: 'default' };
        return <Tag color={info.color}>{info.label}</Tag>;
      },
    },
    {
      title: '加入时间',
      dataIndex: 'joined_at',
      key: 'joined_at',
      render: (v: string) => (v ? new Date(v).toLocaleDateString('zh-CN') : '-'),
    },
  ];

  return (
    <PageContainer
      title="班级管理"
      subtitle="管理班级信息、班级码和成员"
      actions={
        <Space>
          <Button icon={<ReloadOutlined />} onClick={() => refresh()}>
            刷新
          </Button>
          <Button
            type="primary"
            icon={<PlusOutlined />}
            onClick={() => classDrawer.openCreate()}
          >
            创建班级
          </Button>
        </Space>
      }
    >
      <Table
        columns={columns}
        dataSource={classes}
        rowKey="id"
        loading={loading}
        pagination={{
          current: page,
          total,
          pageSize: 20,
          onChange: (p) => refresh(p),
          showTotal: (t) => `共 ${t} 条记录`,
        }}
        onRow={(record) => ({
          onClick: () => openMemberDrawer(record),
          style: { cursor: 'pointer' },
        })}
      />

      {/* Create class drawer */}
      <DrawerForm
        title={classDrawer.editingRecord ? '编辑班级' : '创建班级'}
        open={classDrawer.open}
        onClose={classDrawer.close}
        onSubmit={classDrawer.handleSubmit}
        initialValues={classDrawer.initialValues}
        loading={classDrawer.loading}
        width={480}
        columns={1}
      >
        <Form.Item
          name="name"
          label="班级名称"
          rules={[{ required: true, message: '请输入班级名称' }]}
        >
          <Input placeholder="例如：三年级二班" maxLength={50} />
        </Form.Item>
        <Form.Item
          name="school_name"
          label="学校名称"
        >
          <Input placeholder="例如：阳光小学" maxLength={100} />
        </Form.Item>
      </DrawerForm>

      {/* Member drawer */}
      <Drawer
        title={
          <Space>
            <TeamOutlined />
            <span>{memberClass ? `${memberClass.name} - 班级成员` : '班级成员'}</span>
            {memberClass && (
              <Tag
                color={memberClass.is_active ? 'success' : 'error'}
                style={{ marginLeft: 8 }}
              >
                {memberClass.is_active ? '活跃' : '已停用'}
              </Tag>
            )}
          </Space>
        }
        open={memberDrawerOpen}
        onClose={() => {
          setMemberDrawerOpen(false);
          setMemberClass(null);
          setMembers([]);
        }}
        width={600}
        styles={{
          body: { background: isDark ? '#141414' : undefined, padding: 0 },
        }}
        extra={
          memberClass ? (
            <Space>
              <Text type="secondary">班级码：</Text>
              <Text
                code
                style={{
                  fontFamily: 'JetBrains Mono, Consolas, monospace',
                  fontSize: 14,
                  letterSpacing: 1,
                }}
              >
                {memberClass.class_code}
              </Text>
              <Button
                size="small"
                icon={<CopyOutlined />}
                onClick={() => handleCopyCode(memberClass.class_code)}
              >
                复制
              </Button>
            </Space>
          ) : null
        }
      >
        <Table
          columns={memberColumns}
          dataSource={members}
          rowKey="user_id"
          loading={membersLoading}
          pagination={false}
          size="middle"
          locale={{ emptyText: '暂无成员' }}
        />
      </Drawer>
    </PageContainer>
  );
}