// core libs
// types
import { computed, watch, type ComputedRef, type Ref } from "vue";
import { ref } from "vue";
import { apiClient } from "@/utils/api-client";

// libs
import { cloneDeep, merge } from "lodash-es";
import type { ConfigMap, Setting, SettingForm } from "@halo-dev/api-client";
import type { FormKitSchemaCondition, FormKitSchemaNode } from "@formkit/core";
import { Toast } from "@halo-dev/components";
import { useI18n } from "vue-i18n";

const initialConfigMap: ConfigMap = {
  apiVersion: "v1alpha1",
  kind: "ConfigMap",
  metadata: {
    name: "",
  },
  data: {},
};

interface useSettingFormReturn {
  setting: Ref<Setting | undefined>;
  configMap: Ref<ConfigMap>;
  configMapFormData: Ref<Record<string, Record<string, string>> | undefined>;
  saving: Ref<boolean>;
  handleFetchSettings: () => void;
  handleFetchConfigMap: () => void;
  handleSaveConfigMap: () => void;
  handleReset: () => void;
}

export function useSettingForm(
  settingName: Ref<string | undefined>,
  configMapName: Ref<string | undefined>
): useSettingFormReturn {
  const { t } = useI18n();

  const setting = ref<Setting>();
  const configMap = ref<ConfigMap>(cloneDeep(initialConfigMap));
  const configMapFormData = ref<
    Record<string, Record<string, string>> | undefined
  >();

  const saving = ref(false);

  const handleFetchSettings = async () => {
    if (!settingName.value) {
      setting.value = undefined;
      return;
    }
    try {
      const { data } = await apiClient.extension.setting.getv1alpha1Setting({
        name: settingName.value,
      });
      setting.value = data;

      // init configMapFormData
      if (!configMapFormData.value) {
        const { forms } = setting.value.spec;
        const initialConfigMapFormData: Record<
          string,
          Record<string, string>
        > = {};
        forms.forEach((form) => {
          initialConfigMapFormData[form.group] = {};
          const formSchema = form.formSchema as (
            | FormKitSchemaCondition
            | FormKitSchemaNode
          )[];
          formSchema.forEach((schema) => {
            // @ts-ignore
            if ("name" in schema && "$formkit" in schema) {
              initialConfigMapFormData[form.group][schema.name] =
                schema.value || undefined;
            }
          });
        });
        configMapFormData.value = cloneDeep(initialConfigMapFormData);
      }
    } catch (e) {
      console.error("Failed to fetch setting", e);
    }
  };

  const handleFetchConfigMap = async () => {
    if (!configMapName.value) {
      configMap.value = cloneDeep(initialConfigMap);
      configMapFormData.value = undefined;
      return;
    }
    try {
      const response = await apiClient.extension.configMap.getv1alpha1ConfigMap(
        {
          name: configMapName.value,
        },
        {
          mute: true,
        }
      );

      configMap.value = response.data;

      const { data } = configMap.value;

      if (data) {
        // merge objects value
        const { forms } = setting.value?.spec || {};

        forms?.forEach((form) => {
          if (!configMapFormData.value) {
            return;
          }
          configMapFormData.value[form.group] = merge(
            configMapFormData.value[form.group] || {},
            JSON.parse(data[form.group] || "{}")
          );
        });
      }
    } catch (e) {
      console.error("Failed to fetch configMap", e);
    }
  };

  const handleSaveConfigMap = async () => {
    try {
      saving.value = true;

      if (!configMap.value.metadata.name && configMapName.value) {
        configMap.value.metadata.name = configMapName.value;
      }

      setting.value?.spec.forms.forEach((item: SettingForm) => {
        // @ts-ignore
        configMap.value.data[item.group] = JSON.stringify(
          configMapFormData?.value?.[item.group]
        );
      });

      if (!configMap.value.metadata.creationTimestamp) {
        const { data } =
          await apiClient.extension.configMap.createv1alpha1ConfigMap({
            configMap: configMap.value,
          });

        configMapName.value = data.metadata.name;
      } else {
        const { data } =
          await apiClient.extension.configMap.updatev1alpha1ConfigMap({
            configMap: configMap.value,
            name: configMap.value.metadata.name,
          });
        configMapName.value = data.metadata.name;
      }

      Toast.success(t("core.common.toast.save_success"));
    } catch (e) {
      console.error("Failed to save configMap", e);
    } finally {
      await handleFetchSettings();
      await handleFetchConfigMap();
      saving.value = false;
    }
  };

  const handleReset = () => {
    setting.value = undefined;
    configMap.value = cloneDeep(initialConfigMap);
    configMapFormData.value = undefined;
  };

  return {
    setting,
    configMap,
    configMapFormData,
    saving,
    handleFetchSettings,
    handleFetchConfigMap,
    handleSaveConfigMap,
    handleReset,
  };
}

interface useSettingFormConvertReturn {
  formSchema: ComputedRef<
    (FormKitSchemaCondition | FormKitSchemaNode)[] | undefined
  >;
  configMapFormData: Ref<Record<string, Record<string, string>>>;
  convertToSave: () => ConfigMap | undefined;
}

export function useSettingFormConvert(
  setting: Ref<Setting | undefined>,
  configMap: Ref<ConfigMap | undefined>,
  group: Ref<string>
): useSettingFormConvertReturn {
  const configMapFormData = ref<Record<string, Record<string, string>>>({});

  const formSchema = computed(() => {
    if (!setting.value) {
      return;
    }
    const { forms } = setting.value.spec;
    return forms.find((item) => item.group === group?.value)?.formSchema as (
      | FormKitSchemaCondition
      | FormKitSchemaNode
    )[];
  });

  watch(
    () => configMap.value,
    () => {
      const { forms } = setting.value?.spec || {};

      forms?.forEach((form) => {
        configMapFormData.value[form.group] = JSON.parse(
          configMap.value?.data?.[form.group] || "{}"
        );
      });

      Object.keys(configMap.value?.data || {}).forEach((key) => {
        if (!forms?.find((item) => item.group === key)) {
          configMapFormData.value[key] = JSON.parse(
            configMap.value?.data?.[key] || "{}"
          );
        }
      });
    },
    {
      immediate: true,
    }
  );

  function convertToSave() {
    const configMapToUpdate = cloneDeep(configMap.value);

    if (!configMapToUpdate) {
      return;
    }

    const data: {
      [key: string]: string;
    } = {};

    const { forms } = setting.value?.spec || {};

    forms?.forEach((item: SettingForm) => {
      data[item.group] = JSON.stringify(configMapFormData?.value?.[item.group]);
    });

    Object.keys(configMap.value?.data || {}).forEach((key) => {
      if (!forms?.find((item) => item.group === key)) {
        data[key] = configMap.value?.data?.[key] || "{}";
      }
    });

    configMapToUpdate.data = data;
    return configMapToUpdate;
  }

  return {
    formSchema,
    configMapFormData,
    convertToSave,
  };
}