import type {
  FormProps,
  FormActionType,
  UseFormReturnType,
} from "../types/form";
import type { ComputedRef, Ref } from "vue";
import { ref, onUnmounted, unref, nextTick, watch } from "vue";
import { isProdMode } from "@/utils/env";
import { getDynamicProps } from "@/utils";

type DynamicProps<T> = {
  [P in keyof T]: Ref<T[P]> | T[P] | ComputedRef<T[P]>;
};

type Props = Partial<DynamicProps<FormProps>>;

export function useForm(props?: Props): UseFormReturnType {
  const formRef = ref<Nullable<FormActionType>>(null);
  const loadedRef = ref<Nullable<boolean>>(false);

  async function getForm() {
    const form = unref(formRef);
    if (!form) {
      console.error(
        "The form instance has not been obtained, please make sure that the form has been rendered when performing the form operation!"
      );
    }
    await nextTick();
    return form as FormActionType;
  }

  function register(instance: FormActionType) {
    isProdMode() &&
      onUnmounted(() => {
        formRef.value = null;
        loadedRef.value = null;
      });
    if (unref(loadedRef) && isProdMode() && instance === unref(formRef)) return;

    formRef.value = instance;
    loadedRef.value = true;

    watch(
      () => props,
      () => {
        props && instance.setProps(getDynamicProps(props));
      },
      {
        immediate: true,
        deep: true,
      }
    );
  }

  const methods: FormActionType = {
    setProps: async (formProps: Partial<FormProps>) => {
      const form = await getForm();
      await form.setProps(formProps);
    },

    resetFields: async () => {
      getForm().then(async (form) => {
        await form.resetFields();
      });
    },

    clearValidate: async (name?: string | string[]) => {
      const form = await getForm();
      await form.clearValidate(name);
    },

    getFieldsValue: <T>() => {
      return unref(formRef)?.getFieldsValue() as T;
    },

    setFieldsValue: async <T>(values: T) => {
      const form = await getForm();
      await form.setFieldsValue<T>(values);
    },

    submit: async (): Promise<any> => {
      const form = await getForm();
      return form.submit();
    },

    validate: async (nameList?: any[]): Promise<any> => {
      const form = await getForm();
      return form.validate(nameList);
    },

    setLoading: (value: boolean) => {
      loadedRef.value = value;
    },

    setSchema: async (values) => {
      const form = await getForm();
      form.setSchema(values);
    },
  };

  return [register, methods];
}
