import { Button, Segmented, Space, Table, Tag } from 'antd';
import { useQuery } from '@tanstack/react-query';
import { Link, useNavigate, useSearchParams } from 'react-router-dom';
import { api } from '../api/client';
import { PageHeader, unwrapList } from './ResourcePage';
import { ApplyBucketBar, PROCESS_BUCKETS } from './ApplyBucketBar';
import { fmtCreated } from '../time';
import { zh } from '../labels';
import { HR_APPLY_LABEL } from './hrStatus';

const SOURCE_LABEL: Record<string, string> = {
  HR: '人事',
  SEAL: '用章',
  OFFICE: '办公',
  EXPENSE: '费用',
};

const KIND_LABEL: Record<string, string> = {
  ...HR_APPLY_LABEL,
  SEAL: '用章',
  ASSET_BUY: '资产购置',
  ASSET_USE: '资产领用',
  VEHICLE: '用车',
  EXPENSE: '报销',
  LOAN: '借支',
};

const BUCKET_META: Record<string, { color: string; text: string }> = {
  pending: { color: 'processing', text: '待审批' },
  approved: { color: 'success', text: '已通过' },
  rejected: { color: 'error', text: '已驳回' },
  occupying: { color: 'blue', text: '占用中' },
  out: { color: 'blue', text: '外带中' },
  overdue: { color: 'error', text: '逾期未还' },
  returned: { color: 'success', text: '已归还' },
};

type FlowRow = {
  id: string;
  source: string;
  kind: string;
  title: string;
  status: string;
  bucket: string;
  createdAt: string;
  path: string;
};

export default function MyFlowPage() {
  const [params] = useSearchParams();
  const navigate = useNavigate();
  const bucket = params.get('bucket') || '';
  const kind = params.get('kind') || '';
  const qs = new URLSearchParams();
  if (bucket) qs.set('bucket', bucket);
  if (kind) qs.set('kind', kind);
  const endpoint = `/office/flow${qs.toString() ? `?${qs}` : ''}`;
  const q = useQuery({ queryKey: [endpoint], queryFn: () => api.get(endpoint) });
  const items = unwrapList(q.data).items as unknown as FlowRow[];

  const setKind = (v: string) => {
    const next = new URLSearchParams();
    if (bucket) next.set('bucket', bucket);
    if (v) next.set('kind', v);
    const s = next.toString();
    navigate(s ? `/office/flow?${s}` : '/office/flow');
  };

  return (
    <>
      <PageHeader
        title="我的申请"
        description="跟踪自己提交的人事、用章、办公和费用。要新开一单，从右侧进对应发起页。"
            extra={
              <ApplyBucketBar
                basePath="/office/flow"
                buckets={[
              ...PROCESS_BUCKETS,
              { value: 'occupying', label: '占用中' },
              { value: 'out', label: '外带中' },
              { value: 'overdue', label: '逾期未还' },
            ]}
            extra={
              <Space>
                <Button onClick={() => navigate('/office/hr-apply')}>人事</Button>
                <Button onClick={() => navigate('/office/seal-apply')}>用章</Button>
                <Button type="primary" onClick={() => navigate('/office/apply')}>
                  办公
                </Button>
              </Space>
            }
          />
        }
      />
      <div style={{ marginBottom: 16 }}>
        <Segmented
          value={kind}
          onChange={(v) => setKind(String(v))}
          options={[
            { label: '全部类型', value: '' },
            { label: '人事', value: 'HR' },
            { label: '用章', value: 'SEAL' },
            { label: '办公', value: 'OFFICE' },
            { label: '费用', value: 'EXPENSE' },
          ]}
        />
      </div>
      <Table
        className="ops-table"
        rowKey={(r) => `${r.source}-${r.id}`}
        loading={q.isLoading}
        dataSource={items}
        pagination={{ defaultPageSize: 10, showSizeChanger: true, showTotal: (n) => `共 ${n} 条` }}
        columns={[
          { title: '来源', width: 80, render: (_: unknown, r: FlowRow) => SOURCE_LABEL[r.source] || r.source },
          { title: '类型', width: 110, render: (_: unknown, r: FlowRow) => KIND_LABEL[r.kind] || r.kind },
          {
            title: '事项',
            ellipsis: true,
            render: (_: unknown, r: FlowRow) => <Link to={r.path}>{r.title}</Link>,
          },
          {
            title: '状态',
            width: 110,
            render: (_: unknown, r: FlowRow) => {
              const s = BUCKET_META[r.bucket] || { color: 'default', text: zh(r.status) };
              return <Tag color={s.color}>{s.text}</Tag>;
            },
          },
          { title: '创建时间', width: 170, render: (_: unknown, r: FlowRow) => fmtCreated(r.createdAt) },
        ]}
      />
    </>
  );
}