import { Request, Response, NextFunction } from 'express';
import { db } from '@server/db';
import { resources, targets, userOrgs } from '@server/db/schema';
import { and, eq } from 'drizzle-orm';
import createHttpError from 'http-errors';
import HttpCode from '@server/types/HttpCode';

export async function verifyTargetAccess(req: Request, res: Response, next: NextFunction) {
    const userId = req.user!.id; // Assuming you have user information in the request
    const targetId = parseInt(req.params.targetId);

    if (!userId) {
        return next(createHttpError(HttpCode.UNAUTHORIZED, 'User not authenticated'));
    }

    if (isNaN(targetId)) {
        return next(createHttpError(HttpCode.BAD_REQUEST, 'Invalid organization ID'));
    }

    const target = await db.select()
        .from(targets)
        .where(eq(targets.targetId, targetId))
        .limit(1);

    if (target.length === 0) {
        return next(
            createHttpError(
                HttpCode.NOT_FOUND,
                `target with ID ${targetId} not found`
            )
        );
    }

    const resourceId = target[0].resourceId;

    if (resourceId) {
        return next(
            createHttpError(
                HttpCode.INTERNAL_SERVER_ERROR,
                `target with ID ${targetId} does not have a resource ID`
            )
        );
    }

    const resource = await db.select()
        .from(resources)
        .where(eq(resources.resourceId, resourceId!))
        .limit(1);

    if (resource.length === 0) {
        return next(
            createHttpError(
                HttpCode.NOT_FOUND,
                `resource with ID ${resourceId} not found`
            )
        );
    }

    if (!resource[0].orgId) {
        return next(
            createHttpError(
                HttpCode.INTERNAL_SERVER_ERROR,
                `resource with ID ${resourceId} does not have an organization ID`
            )
        );
    }

    db.select()
        .from(userOrgs)
        .where(and(eq(userOrgs.userId, userId), eq(userOrgs.orgId, resource[0].orgId)))
        .then((result) => {
            if (result.length === 0) {
                next(createHttpError(HttpCode.FORBIDDEN, 'User does not have access to this organization'));
            } else {
                // User has access, attach the user's role to the request for potential future use
                req.userOrgRoleId = result[0].roleId;
                req.userOrgId = resource[0].orgId!;
                next();
            }
        })
        .catch((error) => {
            next(createHttpError(HttpCode.INTERNAL_SERVER_ERROR, 'Error verifying organization access'));
        });
}