"use client";

import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import * as z from "zod";
import { Button } from "@/components/ui/button";
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormLabel,
  FormMessage
} from "@/components/ui/form";
import { Input } from "@/components/ui/input";
import { toast } from "sonner";
import { documentNumberingService } from "@/lib/services/document-numbering.service";
import { CancelNumberDto } from "@/types/dto/numbering.dto";
import { useState } from "react";

const formSchema = z.object({
  documentNumber: z.string().min(3, "Document Number is required"),
  reason: z.string().min(5, "Reason must be at least 5 characters"),
});

type CancelNumberFormData = z.infer<typeof formSchema>;

export function CancelNumberForm() {
  const [loading, setLoading] = useState(false);

  const form = useForm<CancelNumberFormData>({
    resolver: zodResolver(formSchema) as any,
    defaultValues: {
      documentNumber: "",
      reason: "",
    },
  });

  async function onSubmit(values: CancelNumberFormData) {
    setLoading(true);
    try {
      const dto: CancelNumberDto = values;
      await documentNumberingService.cancelNumber(dto);
      toast.success("Number cancelled successfully.");
      form.reset();
    } catch (error) {
      toast.error("Failed to cancel number. It may not exist or is already cancelled.");
      console.error(error);
    } finally {
      setLoading(false);
    }
  }

  return (
    <Form {...form}>
      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4 border p-4 rounded-md">
        <h3 className="text-lg font-medium">Cancel Number</h3>
        <p className="text-sm text-gray-500">Permanently cancel a number (e.g. if generated by mistake). It cannot be reused.</p>

        <FormField control={form.control} name="documentNumber" render={({ field }) => (
          <FormItem>
            <FormLabel>Document Number</FormLabel>
            <FormControl>
              <Input placeholder="e.g. LCB3-COR-GGL-2025-0001" {...field} />
            </FormControl>
            <FormMessage />
          </FormItem>
        )} />

        <FormField control={form.control} name="reason" render={({ field }) => (
          <FormItem>
            <FormLabel>Reason</FormLabel>
            <FormControl>
              <Input placeholder="Reason for cancellation..." {...field} />
            </FormControl>
            <FormMessage />
          </FormItem>
        )} />

        <Button type="submit" variant="destructive" disabled={loading}>
          {loading ? "Cancelling..." : "Cancel Number"}
        </Button>
      </form>
    </Form>
  );
}