feat(asset-form): add multi-step asset registration form with validat…

frontend/app/pages/AssetFormPage.tsx

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+import { useState, useEffect } from "react";
+import { useForm, FormProvider } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { assetSchema, AssetFormData } from "../schemas/assetSchema";
+import FormStep1 from "../../components/form/FormStep1";
+import FormStep2 from "../components/form/FormStep2";
+import FormStep3 from "../components/form/FormStep3";
+import FormStep4 from "../components/form/FormStep4";
+import ProgressBar from "../components/ProgressBar";
+import { saveToStorage, getFromStorage, clearStorage } from "../utils/storage";
+import { toast } from "react-toastify";
+import "react-toastify/dist/ReactToastify.css";
+import { createAsset } from "../utils/api";
+
+const steps = [FormStep1, FormStep2, FormStep3, FormStep4];
+
+const AssetFormPage = () => {
+  const [currentStep, setCurrentStep] = useState(0);
+
+  const methods = useForm<AssetFormData>({
+    resolver: zodResolver(assetSchema),
+    defaultValues: getFromStorage("assetForm") || {},
+    mode: "onChange",
+  });
+
+  const CurrentStepComponent = steps[currentStep];
+
+  useEffect(() => {
+    const subscription = methods.watch((data) => saveToStorage("assetForm", data));
+    return () => subscription.unsubscribe();
+  }, [methods]);
+
+  const nextStep = async () => {
+    const isValid = await methods.trigger();
+    if (isValid) setCurrentStep((prev) => Math.min(prev + 1, steps.length - 1));
+  };
+
+  const prevStep = () => setCurrentStep((prev) => Math.max(prev - 1, 0));
+
+  const onSubmit = async (data: AssetFormData) => {
+    try {
+      await createAsset(data);
+      toast.success("Asset created successfully!");
+      clearStorage("assetForm");
+      methods.reset();
+      setCurrentStep(0);
+    } catch (error: any) {
+      toast.error(error.message || "Failed to create asset");
+    }
+  };
+
+  return (
+    <div className="max-w-2xl mx-auto p-4">
+      <ProgressBar step={currentStep + 1} total={steps.length} />
+      <FormProvider {...methods}>
+        <form onSubmit={methods.handleSubmit(onSubmit)}>
+          <CurrentStepComponent />
+          <div className="flex justify-between mt-4">
+            {currentStep > 0 && (
+              <button
+                type="button"
+                onClick={prevStep}
+                className="px-4 py-2 bg-gray-200 rounded hover:bg-gray-300"
+              >
+                Back
+              </button>
+            )}
+            {currentStep < steps.length - 1 ? (
+              <button
+                type="button"
+                onClick={nextStep}
+                className="ml-auto px-4 py-2 bg-emerald-500 text-white rounded hover:bg-emerald-600"
+              >
+                Next
+              </button>
+            ) : (
+              <button
+                type="submit"
+                className="ml-auto px-4 py-2 bg-emerald-500 text-white rounded hover:bg-emerald-600"
+              >
+                Submit
+              </button>
+            )}
+          </div>
+        </form>
+      </FormProvider>
+    </div>
+  );
+};
+
+export default AssetFormPage;

frontend/app/utils/api.ts

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+import { AssetFormData } from "./schemas/assetSchema";
+
+export const createAsset = async (data: AssetFormData) => {
+  const formData = new FormData();
+
+  Object.entries(data).forEach(([section, values]) => {
+    if (typeof values === "object" && values !== null) {
+      Object.entries(values).forEach(([key, value]) => {
+        if (key === "images" && Array.isArray(value)) {
+          value.forEach((file) => formData.append("images", file));
+        } else formData.append(key, value as any);
+      });
+    }
+  });
+
+  const res = await fetch("/api/assets", {
+    method: "POST",
+    body: formData,
+  });
+
+  if (!res.ok) throw new Error("Failed to create asset");
+  return res.json();
+};

frontend/app/utils/schemas/assetSchema.ts

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+import { z } from 'zod';
+
+export const assetSchema = z.object({
+  basic: z.object({
+    name: z.string().min(2, "Asset name is required"),
+    serialNumber: z.string().min(2, "Serial/ID is required"),
+    category: z.string().min(1, "Select a category"),
+  }),
+  details: z.object({
+    description: z.string().optional(),
+    purchaseDate: z.string().min(1, "Purchase date is required"),
+    purchasePrice: z
+      .number({ invalid_type_error: "Must be a number" })
+      .min(0, "Price must be positive"),
+    warrantyExpiration: z.string().optional(),
+  }),
+  assignment: z.object({
+    department: z.string().min(1, "Select a department"),
+    location: z.string().min(1, "Select a location"),
+    assignedUser: z.string().optional(),
+  }),
+  additional: z.object({
+    status: z.enum(["active", "inactive"]),
+    condition: z.enum(["new", "good", "fair", "poor"]),
+    tags: z.array(z.string()).optional(),
+    images: z.array(z.instanceof(File)).optional(),
+  }),
+});
+
+export type AssetFormData = z.infer<typeof assetSchema>;

frontend/components/ProgressBar.tsx

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+import { FC } from "react";
+
+interface ProgressBarProps {
+  step: number;
+  total: number;
+}
+
+const ProgressBar: FC<ProgressBarProps> = ({ step, total }) => {
+  const percentage = (step / total) * 100;
+  return (
+    <div className="w-full bg-gray-200 rounded-full h-2 mb-4">
+      <div
+        className="bg-emerald-500 h-2 rounded-full transition-all"
+        style={{ width: `${percentage}%` }}
+      />
+    </div>
+  );
+};
+
+export default ProgressBar;

frontend/components/form/DatePicker.tsx

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+import { FC } from "react";
+import { FieldError } from "react-hook-form";
+
+interface DatePickerProps extends React.InputHTMLAttributes<HTMLInputElement> {
+  label: string;
+  error?: FieldError;
+}
+
+const DatePicker: FC<DatePickerProps> = ({ label, error, ...props }) => (
+  <div className="mb-4">
+    <label className="block text-sm font-medium text-gray-700">{label}</label>
+    <input
+      type="date"
+      className={`mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:border-emerald-500 focus:ring focus:ring-emerald-200 ${
+        error ? "border-red-500" : ""
+      }`}
+      {...props}
+    />
+    {error && <p className="text-red-500 text-sm mt-1">{error.message}</p>}
+  </div>
+);
+
+export default DatePicker;

frontend/components/form/FileUpload.tsx

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+import { FC, useState } from "react";
+import { FieldError } from "react-hook-form";
+
+interface FileUploadProps {
+  label: string;
+  onChange: (files: File[]) => void;
+  error?: FieldError;
+}
+
+const FileUpload: FC<FileUploadProps> = ({ label, onChange, error }) => {
+  const [previews, setPreviews] = useState<string[]>([]);
+
+  const handleFiles = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const files = e.target.files ? Array.from(e.target.files) : [];
+    onChange(files);
+    setPreviews(files.map((file) => URL.createObjectURL(file)));
+  };
+
+  return (
+    <div className="mb-4">
+      <label className="block text-sm font-medium text-gray-700">{label}</label>
+      <input
+        type="file"
+        multiple
+        onChange={handleFiles}
+        className={`mt-1 block w-full text-sm text-gray-500 file:mr-4 file:py-2 file:px-4 file:rounded-md file:border-0 file:text-sm file:bg-emerald-500 file:text-white hover:file:bg-emerald-600 ${
+          error ? "border-red-500" : ""
+        }`}
+      />
+      <div className="flex mt-2 gap-2">
+        {previews.map((src, idx) => (
+          <img key={idx} src={src} alt={`preview-${idx}`} className="w-16 h-16 object-cover rounded" />
+        ))}
+      </div>
+      {error && <p className="text-red-500 text-sm mt-1">{error.message}</p>}
+    </div>
+  );
+};
+
+export default FileUpload;

frontend/components/form/FormStep1.tsx

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+import { useFormContext } from "react-hook-form";
+import Input from "./Input";
+import Select from "./Select";
+
+const categories = ["Laptop", "Monitor", "Furniture", "Other"];
+
+const FormStep1 = () => {
+  const { register, formState: { errors } } = useFormContext();
+
+  return (
+    <div>
+      <Input
+        label="Asset Name"
+        {...register("basic.name")}
+        error={errors.basic?.name}
+      />
+      <Input
+        label="Asset ID / Serial Number"
+        {...register("basic.serialNumber")}
+        error={errors.basic?.serialNumber}
+      />
+      <Select
+        label="Category"
+        options={categories}
+        {...register("basic.category")}
+        error={errors.basic?.category}
+      />
+    </div>
+  );
+};
+
+export default FormStep1;

frontend/components/form/FormStep2.tsx

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+import { useFormContext } from "react-hook-form";
+import Input from "./Input";
+import TextArea from "./TextArea";
+import DatePicker from "./DatePicker";
+
+const FormStep2 = () => {
+  const { register, formState: { errors } } = useFormContext();
+
+  return (
+    <div>
+      <TextArea
+        label="Description"
+        {...register("details.description")}
+        error={errors.details?.description}
+      />
+      <DatePicker
+        label="Purchase Date"
+        {...register("details.purchaseDate")}
+        error={errors.details?.purchaseDate}
+      />
+      <Input
+        label="Purchase Price"
+        type="number"
+        step="0.01"
+        {...register("details.purchasePrice", { valueAsNumber: true })}
+        error={errors.details?.purchasePrice}
+      />
+      <DatePicker
+        label="Warranty Expiration"
+        {...register("details.warrantyExpiration")}
+        error={errors.details?.warrantyExpiration}
+      />
+    </div>
+  );
+};
+
+export default FormStep2;

frontend/components/form/FormStep3.tsx

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+import { useFormContext } from "react-hook-form";
+import Input from "./Input";
+import Select from "./Select";
+
+const departments = ["IT", "HR", "Finance", "Marketing"];
+const locations = ["HQ", "Branch 1", "Branch 2"];
+
+const FormStep3 = () => {
+  const { register, formState: { errors } } = useFormContext();
+
+  return (
+    <div>
+      <Select
+        label="Department"
+        options={departments}
+        {...register("assignment.department")}
+        error={errors.assignment?.department}
+      />
+      <Select
+        label="Location"
+        options={locations}
+        {...register("assignment.location")}
+        error={errors.assignment?.location}
+      />
+      <Input
+        label="Assigned User (optional)"
+        {...register("assignment.assignedUser")}
+        error={errors.assignment?.assignedUser}
+      />
+    </div>
+  );
+};
+
+export default FormStep3;