import { useForm } from "react-hook-form";
import { Button } from "@/shared/common/ui/button";
import { Label } from "@/shared/common/ui/label";
import { Textarea } from "@/shared/common/ui/textarea";
import { ImageIcon, Loader2 } from "lucide-react";
import { useEffect, useMemo, useState } from "react";
import { FormFeild } from "../components/FormFeild";
import { CreateNewsPayload, NewsItem } from "../types/newsTypes";
import { useNewsCategory } from "../hooks/useNewsCategory";
import { useNavigate, useParams } from "react-router-dom";
import { useNews } from "../hooks/useNews";
import { toast } from "sonner";
import { ContactUsParams } from "../hooks/useContactUs";

interface FormData {
  titleEn: string;
  titleAm: string;
  subTitleAm: string;
  subTitleEn: string;
  bodyAm: string;
  bodyEn: string;
  newsCategoryId: string;
  image: FileList;
  isActive: boolean;
  isFeatured: boolean;
}

export const EditNews = () => {
  const { id } = useParams();
  const { singleItem: item, updateItem } = useNews(undefined, id);
  const [isSubmitting, setIsSubmitting] = useState<boolean>(false);
  const navigate = useNavigate();
  const defaultValues = useMemo(
    () => ({
      titleEn: item?.title?.en || "",
      titleAm: item?.title?.am || "",
      subTitleAm: item?.subTitle?.am || "",
      subTitleEn: item?.subTitle?.en || "",
      bodyAm: item?.body?.am || "",
      bodyEn: item?.body?.en || "",
      newsCategoryId: item?.newsCategoryId || "",
      isActive: item?.isActive || false,
      isFeatured: item?.isFeatured || false,
      image: undefined,
    }),
    [item] // 👈 recompute only when item changes
  );

  const {
    register,
    handleSubmit,
    watch,
    setValue,
    reset,
    formState: { errors },
  } = useForm<FormData>({
    defaultValues,
  });
  useEffect(() => {
    if (item) {
      reset(defaultValues);
    }
  }, [item, defaultValues, reset]);
  const imageFile = watch("image")?.[0];
  const [imagePreview, setImagePreview] = useState<string>(
    item?.presigned || ""
  );

  // Fetch news categories for dropdown
  const { items: categories } = useNewsCategory();

  useEffect(() => {
    if (imageFile) {
      const url = URL.createObjectURL(imageFile);
      setImagePreview(url);
      return () => URL.revokeObjectURL(url);
    }
  }, [imageFile]);

  const ImageUpload = ({
    label,
    preview,
    existingName,
    register,
    error,
    onView,
    id,
    isRequired = false,
  }: {
    label: string;
    preview: string | null;
    existingName?: string;
    register: any;
    error?: string;
    onView: () => void;
    id: string;
    isRequired?: boolean;
  }) => (
    <div className="space-y-2">
      <Label className="text-gray-700 block mb-2">
        {label} {isRequired && "*"}
      </Label>

      {preview && (
        <div className="mb-3 flex items-center justify-between bg-primary-50 p-3 rounded-lg">
          <div className="flex items-center">
            <ImageIcon className="h-5 w-5 text-primary-500 mr-2" />
            <span className="text-sm font-medium truncate max-w-[200px]">
              {existingName || "Selected Image"}
            </span>
          </div>
          <Button
            type="button"
            variant="ghost"
            size="sm"
            onClick={onView}
            className="text-primary-600 hover:text-primary-800"
          >
            Preview
          </Button>
        </div>
      )}

      <div>
        <FormFeild
          id={id}
          type="file"
          accept="image/*"
          {...register}
          error={error}
        />
      </div>

      {error && <p className="text-xs text-red-500 mt-1">{error}</p>}
    </div>
  );
  const handleEditSubmit = async (formData: FormData) => {
    if (!item) return;
    setIsSubmitting(true);
    try {
      const imageFile = formData.image?.[0];

      const payload: CreateNewsPayload = {
        newsCategoryId: formData.newsCategoryId,
        title: {
          am: formData.titleAm || "",
          en: formData.titleEn || "",
        },
        subTitle: {
          am: formData.subTitleAm || "",
          en: formData.subTitleEn || "",
        },
        body: {
          am: formData.bodyAm || "",
          en: formData.bodyEn || "",
        },
        // Only include fileInfo if there's a new image
        ...(imageFile && {
          fileInfo: {
            fileName: imageFile.name,
            contentType: imageFile.type,
            size: imageFile.size,
            originalname: imageFile.name,
          },
        }),
        isActive: formData.isActive,
        isFeatured: formData.isFeatured,
      };

      await updateItem({
        id: item.id,
        data: payload,
        ...(imageFile && { imageFile }),
      });
      toast.success("News updated successfully");
      navigate(-1);
    } catch (error) {
      toast.error("Failed to update news");
      console.error("Update error:", error);
      setIsSubmitting(false);
    }
  };
  return (
    <div className="max-h-[80vh] overflow-y-auto p-6 bg-white dark:bg-gray-800 rounded-xl border border-gray-200 dark:border-gray-700 shadow-sm">
      <form onSubmit={handleSubmit(handleEditSubmit)} className="space-y-8">
        {/* Category Selection */}
        <div className="bg-gray-50 dark:bg-gray-700 p-5 rounded-lg border border-gray-100 dark:border-gray-600">
          <h3 className="text-lg font-semibold text-gray-800 dark:text-gray-200 mb-4 flex items-center">
            <div className="h-1 w-4 bg-primary-500 mr-2 rounded-full"></div>
            Category
          </h3>
          <div className="space-y-2">
            <Label htmlFor="newsCategoryId" className="text-gray-700 dark:text-gray-300">
              News Category*
            </Label>
            <select
              id="newsCategoryId"
              {...register("newsCategoryId", {
                required: "Category is required",
              })}
              className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md focus:outline-none focus:ring-2 focus:ring-purple-500 dark:bg-gray-600 dark:text-gray-200"
            >
              <option value="">Select a category</option>
              {categories?.map((category) => (
                <option key={category.id} value={category.id}>
                  {category.newsCategoryTitle?.en || "Unnamed Category"}
                </option>
              ))}
            </select>
            {errors.newsCategoryId && (
              <p className="text-xs text-red-500 mt-1">
                {errors.newsCategoryId.message}
              </p>
            )}
          </div>
        </div>

        {/* Title Section */}
        <div className="bg-gray-50 dark:bg-gray-700 p-5 rounded-lg border border-gray-100 dark:border-gray-600">
          <h3 className="text-lg font-semibold text-gray-800 dark:text-gray-100 mb-4 flex items-center">
            <div className="h-1 w-4 bg-primary-500 mr-2 rounded-full"></div>
            Title
          </h3>
          <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
            <div className="space-y-2">
              <Label htmlFor="titleAm" className="text-gray-700 dark:text-gray-200">
                Title (Amharic)*
              </Label>
              <FormFeild
                id="titleAm"
                {...register("titleAm", { required: "Required" })}
                error={errors.titleAm?.message}
                placeholder="News title in Amharic"
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor="titleEn" className="text-gray-700 dark:text-gray-200">
                Title (English)*
              </Label>
              <FormFeild
                id="titleEn"
                {...register("titleEn", { required: "Required" })}
                error={errors.titleEn?.message}
                placeholder="News title in English"
              />
            </div>
          </div>
        </div>

        {/* Subtitle Section */}
        <div className="bg-gray-50 dark:bg-gray-700 p-5 rounded-lg border border-gray-100 dark:border-gray-600">
          <h3 className="text-lg font-semibold text-gray-800 dark:text-gray-100 mb-4 flex items-center">
            <div className="h-1 w-4 bg-primary-500 mr-2 rounded-full"></div>
            Subtitle
          </h3>
          <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
            <div className="space-y-2">
              <Label htmlFor="subTitleAm" className="text-gray-700 dark:text-gray-200">
                Subtitle (Amharic)*
              </Label>
              <FormFeild
                id="subTitleAm"
                {...register("subTitleAm", { required: "Required" })}
                error={errors.subTitleAm?.message}
                placeholder="News subtitle in Amharic"
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor="subTitleEn" className="text-gray-700 dark:text-gray-200">
                Subtitle (English)*
              </Label>
              <FormFeild
                id="subTitleEn"
                {...register("subTitleEn", { required: "Required" })}
                error={errors.subTitleEn?.message}
                placeholder="News subtitle in English"
              />
            </div>
          </div>
        </div>

        {/* Body Section */}
        <div className="bg-gray-50 dark:bg-gray-700 p-5 rounded-lg border border-gray-100 dark:border-gray-600">
          <h3 className="text-lg font-semibold text-gray-800 dark:text-gray-100 mb-4 flex items-center">
            <div className="h-1 w-4 bg-purple-500 mr-2 rounded-full"></div>
            Content
          </h3>
          <div className="space-y-6">
            <div className="space-y-2">
              <Label htmlFor="bodyAm" className="text-gray-700 dark:text-gray-200">
                Content (Amharic)*
              </Label>
              <Textarea
                id="bodyAm"
                {...register("bodyAm", { required: "Required" })}
                rows={6}
                placeholder="News content in Amharic"
                className="min-h-[150px] dark:bg-gray-600 dark:text-gray-200"
              />
              {errors.bodyAm && (
                <p className="text-xs text-red-500 mt-1">
                  {errors.bodyAm.message}
                </p>
              )}
            </div>
            <div className="space-y-2">
              <Label htmlFor="bodyEn" className="text-gray-700 dark:text-gray-200">
                Content (English)*
              </Label>
              <Textarea
                id="bodyEn"
                {...register("bodyEn", { required: "Required" })}
                rows={6}
                placeholder="News content in English"
                className="min-h-[150px] dark:bg-gray-600 dark:text-gray-200"
              />
              {errors.bodyEn && (
                <p className="text-xs text-red-500 mt-1">
                  {errors.bodyEn.message}
                </p>
              )}
            </div>
          </div>
        </div>

        {/* Status Section */}
        <div className="bg-gray-50 dark:bg-gray-700 p-5 rounded-lg border border-gray-100 dark:border-gray-600">
          <h3 className="text-lg font-semibold text-gray-800 dark:text-gray-100 mb-4 flex items-center">
            <div className="h-1 w-4 bg-orange-500 mr-2 rounded-full"></div>
            Settings
          </h3>
          <div className="space-y-4">
            <div className="flex items-center justify-between">
              <Label htmlFor="isActive" className="text-gray-700 dark:text-gray-200 font-medium">
                Is Active
              </Label>
              <button
                type="button"
                onClick={() => setValue("isActive", !watch("isActive"))}
                className={`relative inline-flex h-6 w-11 items-center rounded-full transition-colors ${
                  watch("isActive") ? "bg-primary-500" : "bg-gray-300"
                }`}
              >
                <span
                  className={`inline-block h-4 w-4 transform rounded-full bg-white transition-transform ${
                    watch("isActive") ? "translate-x-6" : "translate-x-1"
                  }`}
                />
              </button>
            </div>
            <div className="flex items-center justify-between">
              <Label htmlFor="isFeatured" className="text-gray-700 font-medium">
                Is Featured
              </Label>
              <button
                type="button"
                onClick={() => setValue("isFeatured", !watch("isFeatured"))}
                className={`relative inline-flex h-6 w-11 items-center rounded-full transition-colors ${
                  watch("isFeatured") ? "bg-yellow-500" : "bg-gray-300"
                }`}
              >
                <span
                  className={`inline-block h-4 w-4 transform rounded-full bg-white transition-transform ${
                    watch("isFeatured") ? "translate-x-6" : "translate-x-1"
                  }`}
                />
              </button>
            </div>
          </div>
        </div>

        {/* Image Upload */}
        <div className="bg-gray-50 dark:bg-gray-700 p-5 rounded-lg border border-gray-100 dark:border-gray-600">
          <h3 className="text-lg font-semibold text-gray-800 dark:text-gray-100 mb-4 flex items-center">
            <div className="h-1 w-4 bg-yellow-500 mr-2 rounded-full"></div>
            Image
          </h3>
          <ImageUpload
            label="News Image"
            preview={imagePreview}
            existingName={item?.fileInfo?.originalname}
            register={register("image")}
            error={errors.image?.message}
            onView={() => window.open(imagePreview, "_blank")}
            id="image"
            isRequired={false}
          />
        </div>

        {/* Actions */}
        <div className="flex justify-end gap-3 pt-6 border-t border-gray-200 dark:border-gray-700">
          <Button
            variant="outline"
            onClick={() => navigate(-1)}
            type="button"
            disabled={isSubmitting}
            className="px-6 py-2 border-gray-300 dark:border-gray-600 text-gray-700 dark:text-gray-200 hover:bg-gray-50 dark:hover:bg-gray-700"
          >
            Cancel
          </Button>
          <Button
            type="submit"
            disabled={isSubmitting}
            className="px-6 py-2 bg-purple-600 hover:bg-purple-700 text-white"
          >
            {isSubmitting ? (
              <span className="flex items-center gap-2">
                <Loader2 className="w-4 h-4 animate-spin" />
                Updating...
              </span>
            ) : (
              "Update News"
            )}
          </Button>
        </div>
      </form>
    </div>
  );
};
