"use client";

import { useCallback, useEffect } from "react";
import { useForm, Controller } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import { useRouter } from "next/navigation";

import Input from "@/src/components/admin/form/input/InputField";
import Label from "@/src/components/admin/form/Label";
import Form from "@/src/components/admin/form/Form";
import FormGroup from "@/src/components/admin/form/FormGroup";
import Select from "@/src/components/admin/form/Select";

import { useToastMessage } from "@/src/hooks/admin/useToastMessage";
import { useStateContext } from "@/src/context/admin/StateContext";
import { useMultiUnique } from "@/src/hooks/admin/useMultiUnique";

import {
  submitStatus,
  uniqueStatus,
  getStatusById,
} from "@/src/services/admin/services";

import {
  statusSchema,
  StatusFormData,
} from "@/src/validation/admin/validation";
import { get } from "http";
import { useFetchById } from "@/src/hooks/admin/useFetchById";

interface AddStatusFormProps {
  onFormSubmit?: () => void;
}

export default function AddStatusForm({ onFormSubmit }: AddStatusFormProps) {
  const router = useRouter();
  const { itemID, setItemID, setRefresh, refresh, setIsDrawerOpen, isDrawerOpen } = useStateContext();
  const { message, setMessage } = useToastMessage();

  const {
    register,
    handleSubmit,
    reset,
    watch,
    setValue,
    control,
    formState: { errors, isSubmitting },
  } = useForm<StatusFormData>({
    resolver: zodResolver(statusSchema),
    defaultValues: {
      service_name: "",
      status_name: "",
    },
  });

  /* =======================
   Unique Check
======================= */
  const { isUnique, nonUniqueFields, loading, error, checkUnique } =
    useMultiUnique(uniqueStatus, 800);

  const serviceName = watch("service_name");
  const statusName = watch("status_name");

  useEffect(() => {
    if (!serviceName || !statusName) return;

    checkUnique({
      payload: {
        service_name: serviceName.trim(),
        status_name: statusName.trim(),
      },
      currentId: itemID,
    });
  }, [serviceName, statusName, itemID, checkUnique]);

  /* =======================
     Fetch (Edit Mode)
  ======================= */
  const setFormData = useCallback((data: any) => {
    reset({
      service_name: data?.service_name || "",
      status_name: data?.status_name || "",
    });
  }, [reset]);

  const fetchService = useCallback(async (itemID: number) => {
    const res = await getStatusById(itemID);
    return res.data.data;
  }, []);

  useFetchById({
    fetchService,
    setFormData,
    onError: (err) => console.error(err),
  });

  /* =======================
     Submit
  ======================= */
  const onSubmit = async (data: StatusFormData) => {
    if (isUnique === false) {
      setMessage({
        type: "error",
        text: "Status already exists.",
      });
      return;
    }

    setMessage(null);

    try {
      const res = await submitStatus(itemID, {
        service_name: data.service_name.trim(),
        status_name: data.status_name.trim(),
      });

      if (!res.data.success) {
        throw new Error(res.data.message);
      }

      setMessage({
        type: "success",
        text: itemID
          ? "Status updated successfully!"
          : "Status added successfully!",
      });

      reset({
        service_name: "",
        status_name: "",
      });

      setTimeout(() => {
        setRefresh(!refresh);
        setIsDrawerOpen(false);
        setItemID(undefined);
      }, 200);
      onFormSubmit?.();
    } catch (err: any) {
      setMessage({
        type: "error",
        text: err?.response?.data?.message || err.message,
      });
    }
  };

  /* =======================
     Static Service Options
  ======================= */
  const serviceOptions = [
    { label: "Home Improvement Program", value: "Home Improvement Program" },
    { label: "First-Time Home Buyer Assistance", value: "First-Time Home Buyer Assistance", },
    { label: "Tenant Maintenance Requests", value: "Tenant Maintenance Requests", },
  ];

  /* =======================
     Render
  ======================= */
  return (
    <Form
      onSubmit={handleSubmit(onSubmit)}
      className="space-y-1"
      message={message || undefined}
      isSubmitting={isSubmitting}
    >
      <div className="flex gap-4">
        {/* Service Dropdown */}
        <FormGroup className="flex-1">
          <Label required>Service Name </Label>
          <Controller
            name="service_name"
            control={control}
            render={({ field }) => (
              <Select
                options={serviceOptions}
                placeholder="Select service"
                value={field.value}
                onChange={(val) => field.onChange(val)}
                error={!!errors.service_name}
                errorMessage={errors.service_name?.message?.toString()}
              />
            )}
          />
        </FormGroup>

        {/* Status Name */}
        <FormGroup className="flex-1">
          <Label required>Status Name</Label>
          <Input
            placeholder="Enter status name"
            {...register("status_name")}
            error={!!errors.status_name || isUnique === false}
            errorMessage={
              errors.status_name?.message ||
              (isUnique === false ? "Status already exists" : undefined) ||
              (error ? "Error checking uniqueness" : undefined)
            }
            hint="e.g., Pending, Completed"
          />
        </FormGroup>

      </div>
    </Form>
  );
}