'use client';

import * as React from 'react';
import { OpenAPIClientContext } from './types';
import { OpenAPIV3 } from 'openapi-types';
import { ServerSelector } from './ServerSelector';
import { useOpenAPIContext } from './OpenAPIContextProvider';

export function ServerURLForm(props: {
    children: React.ReactNode;
    context: OpenAPIClientContext;
    servers: OpenAPIV3.ServerObject[];
    serverIndex: number;
}) {
    const { children, context, servers, serverIndex } = props;
    const ctx = useOpenAPIContext();
    const server = servers[serverIndex];
    const formRef = React.useRef<HTMLFormElement>(null);

    function switchServer(index: number) {
        if (index !== serverIndex) {
            update({
                server: `${index}` ?? '0',
            ...(ctx?.state?.edit ? { edit: 'true' } : undefined) 
            });
        }
    }

    function updateServerVariables(formData: FormData) {
        const variableKeys = Object.keys(server.variables ?? {});
        const variables: Record<string, string> = {};
        for (const pair of formData) {
            if (variableKeys.includes(pair[0]) && !isNaN(Number(pair[1]))) {
                variables[pair[0]] = `${pair[1]}`;
            }
        }
        update({
            server: `${formData.get('server')}` ?? '0',
            ...variables,
            ...(ctx?.state?.edit ? { edit: 'true' } : undefined) 
        });
    }

    function update(variables?: Record<string, string>) {
        if (!context.blockKey) { return; }  
        ctx?.onUpdate({
            block: context.blockKey,
            ...variables,
        });
    }

    return (
        <form ref={formRef} onSubmit={e => { e.preventDefault(); updateServerVariables(new FormData(e.currentTarget)); }} className="contents">
            <fieldset disabled={ctx?.isPending} className="contents">
                <input type="hidden" name="block" value={context.blockKey} />
                {children}
                {ctx?.state?.edit && servers.length > 1 ? (
                    <ServerSelector
                    servers={servers}
                    currentIndex={serverIndex}
                    onChange={switchServer}
                    />
                ) : null}
                <button className='inline-flex pl-4' onClick={() => { 
                    const state = { ...ctx?.state };
                    delete state.edit;
                    update({ server: `${serverIndex}`, ...state, ...(ctx?.state?.edit ? undefined : { edit: 'true' }) });
                }} aria-label={ctx?.state?.edit ? "Clear" : "Edit"}>{ctx?.state?.edit ? 'X' : 'Edit'}</button>
            </fieldset>
        </form>
    );
}