import { and, eq, sql } from "drizzle-orm";
import useDatabase from "~/composables/useDatabase";
import { campaignMembersTable, campaignTable } from "~/db/schema";
import { decryptURI } from "~/shared/general.util";

export default defineEventHandler(async (e) => {
    const link = getRouterParam(e, "link");
    if(!link)        return setResponseStatus(e, 400);

    const id = decryptURI(decodeURIComponent(link), 'campaign');

    if(!id)     return sendRedirect(e, `/campaign`);

    const session = await getUserSession(e);
    if(!session || !session.user)       return sendRedirect(e, `/user/login`);

    const db = useDatabase();
    try
    {
        const campaign = db.select({ owner: campaignTable.owner }).from(campaignTable).where(and(eq(campaignTable.id, sql.placeholder('id')), eq(campaignTable.link, sql.placeholder('link')))).get({ id, link: decodeURIComponent(link) });

        if(!campaign)       return setResponseStatus(e, 404);
        if(campaign && campaign.owner === session.user.id)      return sendRedirect(e, `/campaign/${id}`);

        const members = db.select({ id: campaignMembersTable.user }).from(campaignMembersTable).where(and(eq(campaignMembersTable.id, sql.placeholder('id')), eq(campaignMembersTable.user, sql.placeholder('user')))).get({ id: id, user: session.user.id });
                
        if(members)      return sendRedirect(e, `/campaign/${id}`);

        db.insert(campaignMembersTable).values({ id, rights: 'player', user: session.user!.id }).run();
        
        return sendRedirect(e, `/campaign/${id}`);
    }
    catch(_e)
    {
        return sendRedirect(e, `/campaign`);
    }
})