import { and, eq, or } from 'drizzle-orm';
import useDatabase from '~/composables/useDatabase';
import { campaignCharactersTable, campaignMembersTable, campaignTable, characterTable } from '~/db/schema';

export default defineEventHandler(async (e) => {
    const _id = getRouterParam(e, "id");
    if(!_id)
    {
        setResponseStatus(e, 400);
        return;
    }
    const id = parseInt(_id, 10);

    const _campaign_id = getRouterParam(e, "cid");
    if(!_campaign_id)
    {
        setResponseStatus(e, 400);
        return;
    }
    const campaign_id = parseInt(_campaign_id, 10);

    const session = await getUserSession(e);
    if(!session.user || session.user.state !== 1)
    {
        setResponseStatus(e, 401);
        return;
    }

    const db = useDatabase();
    const character = db.select({ id: characterTable.id }).from(characterTable).where(and(eq(characterTable.id, id), eq(characterTable.owner, session.user.id))).get();
    if(!character || character.id !== id)
        return setResponseStatus(e, 403);

    const campaign = db.select({ id: campaignTable.id }).from(campaignTable).leftJoin(campaignMembersTable, eq(campaignTable.id, campaignMembersTable.id)).where(and(eq(campaignTable.id, campaign_id), or(eq(campaignTable.owner, session.user.id), eq(campaignMembersTable.user, session.user.id)))).get();
    if(!campaign || campaign.id !== campaign_id)
        return setResponseStatus(e, 404);

    db.insert(campaignCharactersTable).values({
        id: campaign_id,
        character: id,
    }).onConflictDoNothing().run();

    return setResponseStatus(e, 200);
});