"use client";

import { DocumentIcon, TrashIcon } from "@heroicons/react/24/outline";
import { Bill } from "../lib/db-types";
import { FC } from "react";
import { useFormState } from "react-dom";
import { gotoHome, updateOrAddBill } from "../lib/actions";

// Next.js does not encode an utf-8 file name correctly when sending a form with a file attachment
// This is a workaround for that
const updateOrAddBillMiddleware = (locationId: string, billId:string|undefined, prevState:any, formData: FormData) => {
    // URL encode the file name of the attachment so it is correctly sent to the server
    const billAttachment = formData.get('billAttachment') as File;
    formData.set('billAttachment', billAttachment, encodeURIComponent(billAttachment.name));
    return updateOrAddBill(locationId, billId, prevState, formData);
}

export interface BillEditFormProps {
    locationID: string,
    bill?: Bill
}

export const BillEditForm:FC<BillEditFormProps> = ({ locationID, bill }) => {

    const { _id: billID, name, paid, attachment, notes } = bill ?? { _id:undefined, name:"", paid:false, notes:"" };

    const initialState = { message: null, errors: {} };
    const handleAction = updateOrAddBillMiddleware.bind(null, locationID, billID);
    const [ state, dispatch ] = useFormState(handleAction, initialState);

    // redirect to the main page
    const handleCancel = () => {
        console.log('handleCancel');
        gotoHome();
    };

    return(
    <div className="card card-compact card-bordered max-w-sm bg-base-100 shadow-s my-1">
        <div className="card-body">
            <form action={ dispatch }>
                {
                    // don't show the delete button if we are adding a new bill
                    bill ?
                    <a href={`/bill/${locationID}-${billID}/delete/`}>
                        <TrashIcon className="h-[1em] w-[1em] absolute cursor-pointer text-error bottom-5 right-4 text-2xl" />
                    </a> : null
                }

                <input id="billName" name="billName" type="text" placeholder="Bill name" className="input input-bordered w-full" defaultValue={name} required />
                <div id="status-error" aria-live="polite" aria-atomic="true">
                    {state.errors?.billName &&
                    state.errors.billName.map((error: string) => (
                        <p className="mt-2 text-sm text-red-500" key={error}>
                        {error}
                        </p>
                    ))}
                </div>
                {
                    // <textarea className="textarea textarea-bordered my-1 w-full max-w-sm block" placeholder="Opis" value="Pričuva, Voda, Smeće"></textarea>

                    attachment ? 
                    <a href={`/attachment/${locationID}-${billID}/${attachment.fileName}`} target="_blank" className='text-center block max-w-[24em] text-nowrap truncate inline-block mt-4'>
                        <DocumentIcon className="h-[1em] w-[1em] text-2xl inline-block mr-1" />
                        {decodeURIComponent(attachment.fileName)}
                    </a>
                    : null
                }
                <input id="billAttachment" name="billAttachment" type="file" className="file-input file-input-bordered w-full max-w-sm file-input-xs my-2" />
                <div id="status-error" aria-live="polite" aria-atomic="true">
                    {state.errors?.billAttachment &&
                    state.errors.billAttachment.map((error: string) => (
                        <p className="mt-2 text-sm text-red-500" key={error}>
                        {error}
                        </p>
                    ))}
                </div>

                <div className="form-control w-32 p-1">
                    <label className="cursor-pointer label p-0">
                        <span className="label-text">Paid</span> 
                        <input id="billPaid" name="billPaid" type="checkbox" className="toggle toggle-success" defaultChecked={paid} />
                    </label>
                </div>

                <textarea id="billNotes" name="billNotes" className="textarea textarea-bordered my-2 w-full max-w-sm block" placeholder="Note" defaultValue={notes ?? ''}></textarea>
                <div id="status-error" aria-live="polite" aria-atomic="true">
                    {state.errors?.billNotes &&
                    state.errors.billNotes.map((error: string) => (
                        <p className="mt-2 text-sm text-red-500" key={error}>
                        {error}
                        </p>
                    ))}
                </div>

                <div id="status-error" aria-live="polite" aria-atomic="true">
                    {state.message &&
                    <p className="mt-2 text-sm text-red-500">
                    {state.message}
                    </p>
                    }
                </div>
                <button type="submit" className="btn btn-primary">Save</button>
                <button type="button" className="btn btn-neutral ml-3" onClick={handleCancel}>Cancel</button>
            </form>
        </div>
    </div>);
}