'use client';

// 反馈审核抽屉:展示本条反馈 + 该用户历史反馈(就近参考),待审核态可采纳(发金币)或拒绝(填用户可见原因)。
// 已审核态只读回显。对接同事 PR#66 接口:POST .../approve、POST .../reject(.../handle 已废弃)。
import { useEffect, useState } from 'react';
import {
  App,
  Button,
  Drawer,
  Form,
  Image,
  Input,
  InputNumber,
  Segmented,
  Space,
  Spin,
  Tag,
  Typography,
} from 'antd';
import { api, errMsg } from '@/lib/api';
import { canDo } from '@/lib/auth';
import { formatUtcTime } from '@/lib/format';
import { mediaUrl } from '@/lib/media';
import type { CursorPage, Feedback } from '@/lib/types';

const { Text, Paragraph } = Typography;

const REWARD_MAX = 10000; // 对齐后端 FEEDBACK_REWARD_MAX_COINS

interface Props {
  feedback: Feedback | null;
  open: boolean;
  onClose: () => void;
  onDone: () => void; // 审核成功后刷新列表
}

// 待审核(同事后端初始态 pending;兼容历史 new 数据)
const isPending = (s: string) => s === 'pending' || s === 'new';

const STATUS_META: Record<string, { label: string; color: string }> = {
  pending: { label: '审核中', color: 'orange' },
  new: { label: '待审核', color: 'orange' },
  adopted: { label: '已采纳', color: 'green' },
  rejected: { label: '未采纳', color: 'red' },
};

const statusTag = (s: string) => {
  const m = STATUS_META[s] ?? { label: s, color: 'default' };
  return <Tag color={m.color}>{m.label}</Tag>;
};

function FeedbackImages({ images }: { images: string[] | null }) {
  if (!images || !images.length) return <Text type="secondary">无截图</Text>;
  return (
    <Image.PreviewGroup>
      <Space size={4} wrap>
        {images.map((src, i) => (
          <Image
            key={i}
            src={mediaUrl(src)}
            width={48}
            height={48}
            style={{ objectFit: 'cover', borderRadius: 4 }}
          />
        ))}
      </Space>
    </Image.PreviewGroup>
  );
}

export default function FeedbackHandleDrawer({ feedback, open, onClose, onDone }: Props) {
  const { message } = App.useApp();
  const [form] = Form.useForm();
  const [action, setAction] = useState<'approve' | 'reject'>('approve');
  const [submitting, setSubmitting] = useState(false);
  const [history, setHistory] = useState<Feedback[]>([]);
  const [loadingHistory, setLoadingHistory] = useState(false);

  const editable = feedback != null && isPending(feedback.status) && canDo(['operator']);

  // 打开时:重置表单 + 拉该用户全部历史反馈(含本条,渲染时滤掉本条)
  useEffect(() => {
    if (!open || !feedback) return;
    setAction('approve');
    form.resetFields();
    let alive = true;
    setLoadingHistory(true);
    api
      .get<CursorPage<Feedback>>('/admin/api/feedbacks', {
        params: { user_id: feedback.user_id, limit: 50, sort_by: 'id', sort_order: 'desc' },
      })
      .then((r) => {
        if (alive) setHistory(r.data.items);
      })
      .catch(() => {
        if (alive) setHistory([]);
      })
      .finally(() => {
        if (alive) setLoadingHistory(false);
      });
    return () => {
      alive = false;
    };
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [open, feedback?.id]);

  const submit = async () => {
    if (!feedback) return;
    const v = await form.validateFields();
    setSubmitting(true);
    try {
      if (action === 'approve') {
        await api.post(`/admin/api/feedbacks/${feedback.id}/approve`, {
          reward_coins: v.reward_coins,
          note: v.note?.trim() || null,
        });
        message.success(`已采纳,发放 ${v.reward_coins} 金币`);
      } else {
        await api.post(`/admin/api/feedbacks/${feedback.id}/reject`, {
          reason: v.reason.trim(),
          note: v.note?.trim() || null,
        });
        message.success('已拒绝');
      }
      onClose();
      onDone();
    } catch (e) {
      message.error(errMsg(e));
    } finally {
      setSubmitting(false);
    }
  };

  const others = feedback ? history.filter((h) => h.id !== feedback.id) : [];

  return (
    <Drawer
      title={feedback ? (editable ? `审核反馈 #${feedback.id}` : `反馈详情 #${feedback.id}`) : ''}
      width={560}
      open={open}
      onClose={onClose}
      destroyOnHidden
      extra={
        editable ? (
          <Button type="primary" danger={action === 'reject'} loading={submitting} onClick={submit}>
            {action === 'approve' ? '采纳并发金币' : '确认拒绝'}
          </Button>
        ) : null
      }
    >
      {feedback && (
        <Space direction="vertical" size="large" style={{ width: '100%' }}>
          {/* 本条反馈 */}
          <div>
            <Text type="secondary">
              用户 {feedback.user_id} · {formatUtcTime(feedback.created_at)}
            </Text>
            <Paragraph style={{ whiteSpace: 'pre-wrap', marginTop: 8, marginBottom: 8 }}>
              {feedback.content || '-'}
            </Paragraph>
            <FeedbackImages images={feedback.images} />
          </div>

          {/* 已审核(或无权限):只读回显 */}
          {!editable && (
            <div
              style={{
                background:
                  feedback.status === 'adopted'
                    ? '#f6ffed'
                    : feedback.status === 'rejected'
                      ? '#fff1f0'
                      : '#fafafa',
                border: `1px solid ${
                  feedback.status === 'adopted'
                    ? '#b7eb8f'
                    : feedback.status === 'rejected'
                      ? '#ffccc7'
                      : '#f0f0f0'
                }`,
                borderRadius: 8,
                padding: 12,
              }}
            >
              <div>
                状态:{statusTag(feedback.status)}
                {feedback.reviewed_at ? (
                  <Text type="secondary"> · {formatUtcTime(feedback.reviewed_at)}</Text>
                ) : null}
              </div>
              {feedback.status === 'adopted' && (
                <div style={{ marginTop: 6 }}>
                  奖励金币:<b>{feedback.reward_coins ?? 0}</b>
                </div>
              )}
              {feedback.status === 'rejected' && (
                <div style={{ marginTop: 6 }}>
                  未采纳原因(用户可见):
                  {feedback.reject_reason || <Text type="secondary">（无）</Text>}
                </div>
              )}
              <div style={{ marginTop: 6 }}>
                审核备注:{feedback.review_note || <Text type="secondary">（无）</Text>}
              </div>
              {isPending(feedback.status) && (
                <div style={{ marginTop: 6 }}>
                  <Text type="secondary">仅 operator / super_admin 可审核</Text>
                </div>
              )}
            </div>
          )}

          {/* 待审核:采纳 / 拒绝表单 */}
          {editable && (
            <div>
              <Segmented
                value={action}
                onChange={(v) => setAction(v as 'approve' | 'reject')}
                options={[
                  { label: '采纳(发金币)', value: 'approve' },
                  { label: '拒绝', value: 'reject' },
                ]}
                style={{ marginBottom: 16 }}
              />
              {/* preserve=false:切换采纳/拒绝时卸载的字段从 store 移除,validateFields 不误校验另一侧 */}
              <Form form={form} layout="vertical" preserve={false}>
                {action === 'approve' ? (
                  <>
                    <Form.Item
                      name="reward_coins"
                      label={`奖励金币(必填,1 ~ ${REWARD_MAX})`}
                      rules={[
                        { required: true, message: '请输入奖励金币' },
                        { type: 'number', min: 1, max: REWARD_MAX, message: `1 ~ ${REWARD_MAX}` },
                      ]}
                    >
                      <InputNumber
                        style={{ width: '100%' }}
                        min={1}
                        max={REWARD_MAX}
                        placeholder="采纳后发放给用户的金币"
                      />
                    </Form.Item>
                    <Form.Item
                      name="note"
                      label="采纳要点 / 审核备注(选填)"
                      rules={[{ max: 256, message: '最多 256 字' }]}
                    >
                      <Input.TextArea rows={3} maxLength={256} showCount placeholder="如:建议已采纳,将在下个版本上线" />
                    </Form.Item>
                  </>
                ) : (
                  <>
                    <Form.Item
                      name="reason"
                      label="未采纳原因(必填,用户端可见)"
                      rules={[
                        { required: true, message: '请填写未采纳原因' },
                        { max: 256, message: '最多 256 字' },
                      ]}
                    >
                      <Input.TextArea rows={3} maxLength={256} showCount placeholder="向用户说明为何未采纳" />
                    </Form.Item>
                    <Form.Item
                      name="note"
                      label="内部备注(选填,用户不可见)"
                      rules={[{ max: 256, message: '最多 256 字' }]}
                    >
                      <Input.TextArea rows={2} maxLength={256} showCount placeholder="运营内部备注" />
                    </Form.Item>
                  </>
                )}
              </Form>
            </div>
          )}

          {/* 该用户历史反馈 */}
          <div>
            <Text strong>该用户历史反馈{others.length ? `（${others.length}）` : ''}</Text>
            {loadingHistory ? (
              <Spin style={{ display: 'block', margin: '16px 0' }} />
            ) : others.length === 0 ? (
              <div style={{ marginTop: 8 }}>
                <Text type="secondary">该用户暂无其它反馈</Text>
              </div>
            ) : (
              <Space direction="vertical" size={8} style={{ width: '100%', marginTop: 8 }}>
                {others.map((h) => (
                  <div
                    key={h.id}
                    style={{ border: '1px solid #f0f0f0', borderRadius: 8, padding: 10 }}
                  >
                    <div style={{ display: 'flex', justifyContent: 'space-between' }}>
                      <Text type="secondary">
                        #{h.id} · {formatUtcTime(h.created_at)}
                      </Text>
                      {statusTag(h.status)}
                    </div>
                    <Paragraph
                      style={{ whiteSpace: 'pre-wrap', margin: '6px 0 0' }}
                      ellipsis={{ rows: 2, expandable: true, symbol: '展开' }}
                    >
                      {h.content || '-'}
                    </Paragraph>
                    {h.status === 'adopted' && (
                      <Text type="secondary" style={{ fontSize: 12 }}>
                        采纳 · 奖励 {h.reward_coins ?? 0} 金币
                        {h.review_note ? ` · ${h.review_note}` : ''}
                      </Text>
                    )}
                    {h.status === 'rejected' && (
                      <Text type="secondary" style={{ fontSize: 12 }}>
                        未采纳:{h.reject_reason || '-'}
                      </Text>
                    )}
                  </div>
                ))}
              </Space>
            )}
          </div>
        </Space>
      )}
    </Drawer>
  );
}