/**
 * Webhook 配置表单(域名级/邮箱级共用;全局版本在设置模态窗口内)。
 * key 语义:留空保留现有;填空格清除;非空设置新 key。
 */
import { useEffect, useState } from "react";
import { Button, Form, Input, Space, App } from "antd";
import { putDomainWebhook, putMailboxWebhook } from "../api.ts";

/** # 成员变量: 表单当前值(由父组件传入) **/
export interface WebhookValue {
  url: string | null;
  headers: string | null;
  hasKey: boolean;
}

/** # 函数
 * 解析 headers JSON 串为对象(失败返回 {})
 */
export function parseHeaders(s: string | null): Record<string, string> {
  if (!s) return {};
  try {
    const v = JSON.parse(s);
    return v && typeof v === "object" && !Array.isArray(v) ? (v as Record<string, string>) : {};
  } catch {
    return {};
  }
}

/** # 函数
 * Webhook 配置表单组件
 * 参数: scope - "domain" | "mailbox";targetId - 域名/邮箱 ID;value - 当前配置;onSaved - 保存后回调
 */
export function WebhookForm({
  scope,
  targetId,
  value,
  onSaved,
}: {
  scope: "domain" | "mailbox";
  targetId: string;
  value: WebhookValue;
  onSaved: () => void;
}) {
  const { message } = App.useApp();
  const [form] = Form.useForm<{ url: string; headers: string; key?: string }>();
  const [saving, setSaving] = useState(false);

  useEffect(() => {
    form.setFieldsValue({
      url: value.url ?? "",
      headers: value.url ? JSON.stringify(parseHeaders(value.headers), null, 2) : "",
    });
  }, [value, form, targetId]);

  const save = async () => {
    const values = await form.validateFields();
    let headers: Record<string, string> = {};
    if (values.headers.trim()) {
      try {
        headers = JSON.parse(values.headers) as Record<string, string>;
      } catch {
        message.error("自定义请求头必须是合法 JSON 对象");
        return;
      }
    }
    const key = values.key ?? undefined;
    // "填空格清除 key":把单个空格翻译成空串
    const normalizedKey = key !== undefined && key.trim() === "" && key.length > 0 ? "" : key;
    setSaving(true);
    try {
      const body = { url: values.url.trim(), headers, key: normalizedKey };
      if (scope === "domain") await putDomainWebhook(targetId, body);
      else await putMailboxWebhook(targetId, body);
      message.success("Webhook 已保存");
      form.setFieldValue("key", undefined);
      onSaved();
    } catch (err) {
      message.error(err instanceof Error ? err.message : "保存失败");
    } finally {
      setSaving(false);
    }
  };

  const clear = async () => {
    setSaving(true);
    try {
      if (scope === "domain") await putDomainWebhook(targetId, { url: "" });
      else await putMailboxWebhook(targetId, { url: "" });
      message.success("已清除该级 Webhook(将回退到上一级配置)");
      form.resetFields();
      onSaved();
    } catch (err) {
      message.error(err instanceof Error ? err.message : "清除失败");
    } finally {
      setSaving(false);
    }
  };

  return (
    <Form form={form} layout="vertical">
      <Form.Item name="url" label="Webhook URL" extra="留空并保存 = 清除该级配置">
        <Input placeholder="https://hooks.example.com/wmail" allowClear />
      </Form.Item>
      <Form.Item
        name="headers"
        label="自定义请求头(JSON 对象,可选)"
        extra='示例:{"X-Token":"abc"};配置了 key 时默认携带 Authorization: Bearer <key>'
      >
        <Input.TextArea rows={2} placeholder='{"X-Custom":"1"}' />
      </Form.Item>
      <Form.Item
        name="key"
        label="Key"
        extra={
          value.hasKey
            ? "已设置 key(****尾号见保存后提示);留空保留,填空格清除"
            : "可选;默认以 Authorization: Bearer <key> 携带,并用于投递签名"
        }
      >
        <Input.Password placeholder="留空保留现有 key" autoComplete="new-password" />
      </Form.Item>
      <Space>
        <Button type="primary" loading={saving} onClick={() => void save()}>
          保存
        </Button>
        {value.url && (
          <Button danger onClick={() => void clear()}>
            清除该级配置
          </Button>
        )}
      </Space>
    </Form>
  );
}