import { useEffect, useState } from 'react';
import { Form, Modal, Select, Typography, message } from 'antd';
import type { ActivityPosterItem } from '@dukang/shared-types';
import { request, requestDownload, type Paginated } from '../lib/api';
import { ADMIN_OPTIONS_PAGE_SIZE } from '../lib/constants';

type Props = {
  open: boolean;
  partnerIds: string[];
  onClose: () => void;
};

export default function ActivityPosterDownloadModal({ open, partnerIds, onClose }: Props) {
  const [posters, setPosters] = useState<ActivityPosterItem[]>([]);
  const [posterId, setPosterId] = useState<string>();
  const [loading, setLoading] = useState(false);
  const [submitting, setSubmitting] = useState(false);
  const multi = partnerIds.length > 1;

  useEffect(() => {
    if (!open) return;
    setPosterId(undefined);
    setLoading(true);
    void request<Paginated<ActivityPosterItem>>(
      `/admin/activity-posters?status=ACTIVE&page=1&pageSize=${ADMIN_OPTIONS_PAGE_SIZE}`,
    )
      .then((res) => {
        const items = res.items ?? [];
        setPosters(items);
        setPosterId(items[0]?.id);
      })
      .catch((e) => message.error(e instanceof Error ? e.message : '加载活动图失败'))
      .finally(() => setLoading(false));
  }, [open]);

  async function submit() {
    if (!posterId) {
      message.error('请选择活动图');
      return;
    }
    if (!partnerIds.length) {
      message.error('请选择合伙人');
      return;
    }
    setSubmitting(true);
    try {
      if (partnerIds.length === 1) {
        await requestDownload(
          `/admin/activity-posters/${posterId}/image?partnerId=${encodeURIComponent(partnerIds[0])}`,
          {},
          'activity-poster.png',
        );
      } else {
        await requestDownload(
          `/admin/activity-posters/${posterId}/partner-pack`,
          { method: 'POST', body: JSON.stringify({ partnerIds }) },
          'activity-poster-pack.zip',
        );
      }
      message.success('已开始下载');
      onClose();
    } catch (e) {
      message.error(e instanceof Error ? e.message : '下载失败');
    } finally {
      setSubmitting(false);
    }
  }

  return (
    <Modal
      title={multi ? `导出活动图（${partnerIds.length} 人）` : '下载活动图'}
      open={open}
      onCancel={onClose}
      onOk={() => void submit()}
      confirmLoading={submitting}
      okText="下载"
      okButtonProps={{ disabled: loading || !posterId }}
      destroyOnClose
    >
      <Typography.Paragraph type="secondary">
        {multi
          ? '将把所选主合伙人的关联码贴进同一张活动图，打包为 zip。无关联码或测试账号会跳过。'
          : '将把该主合伙人的关联码贴进所选活动图后下载 PNG。'}
      </Typography.Paragraph>
      <Form layout="vertical">
        <Form.Item label="活动图" required>
          <Select
            loading={loading}
            placeholder={loading ? '加载中' : posters.length ? '选择已上架活动图' : '暂无上架活动图'}
            value={posterId}
            onChange={setPosterId}
            options={posters.map((row) => ({ value: row.id, label: row.title }))}
            showSearch
            optionFilterProp="label"
          />
        </Form.Item>
      </Form>
    </Modal>
  );
}