import { Request, Response, NextFunction } from "express";
import { z } from "zod";
import { db } from "@server/db";
import { roles, userOrgs, users } from "@server/db/schemas";
import { and, eq } from "drizzle-orm";
import response from "@server/lib/response";
import HttpCode from "@server/types/HttpCode";
import createHttpError from "http-errors";
import logger from "@server/logger";
import { fromError } from "zod-validation-error";
import { ActionsEnum, checkUserActionPermission } from "@server/auth/actions";
import { OpenAPITags, registry } from "@server/openApi";

async function queryUser(orgId: string, userId: string) {
    const [user] = await db
        .select({
            orgId: userOrgs.orgId,
            userId: users.userId,
            email: users.email,
            username: users.username,
            name: users.name,
            type: users.type,
            roleId: userOrgs.roleId,
            roleName: roles.name,
            isOwner: userOrgs.isOwner,
            isAdmin: roles.isAdmin
        })
        .from(userOrgs)
        .leftJoin(roles, eq(userOrgs.roleId, roles.roleId))
        .leftJoin(users, eq(userOrgs.userId, users.userId))
        .where(and(eq(userOrgs.userId, userId), eq(userOrgs.orgId, orgId)))
        .limit(1);
    return user;
}

export type GetOrgUserResponse = NonNullable<
    Awaited<ReturnType<typeof queryUser>>
>;

const getOrgUserParamsSchema = z
    .object({
        userId: z.string(),
        orgId: z.string()
    })
    .strict();

registry.registerPath({
    method: "get",
    path: "/org/{orgId}/user/{userId}",
    description: "Get a user in an organization.",
    tags: [OpenAPITags.Org, OpenAPITags.User],
    request: {
        params: getOrgUserParamsSchema
    },
    responses: {}
});

export async function getOrgUser(
    req: Request,
    res: Response,
    next: NextFunction
): Promise<any> {
    try {
        const parsedParams = getOrgUserParamsSchema.safeParse(req.params);
        if (!parsedParams.success) {
            return next(
                createHttpError(
                    HttpCode.BAD_REQUEST,
                    fromError(parsedParams.error).toString()
                )
            );
        }

        const { orgId, userId } = parsedParams.data;

        if (!req.userOrg) {
            return next(
                createHttpError(
                    HttpCode.FORBIDDEN,
                    "You do not have access to this organization"
                )
            );
        }

        let user;
        user = await queryUser(orgId, userId);

        if (!user) {
            const [fullUser] = await db
                .select()
                .from(users)
                .where(eq(users.email, userId))
                .limit(1);

            if (fullUser) {
                user = await queryUser(orgId, fullUser.userId);
            }
        }

        if (!user) {
            return next(
                createHttpError(
                    HttpCode.NOT_FOUND,
                    `User with ID ${userId} not found in org`
                )
            );
        }

        if (req.user && user.userId !== req.userOrg.userId) {
            const hasPermission = await checkUserActionPermission(
                ActionsEnum.getOrgUser,
                req
            );
            if (!hasPermission) {
                return next(
                    createHttpError(
                        HttpCode.FORBIDDEN,
                        "User does not have permission perform this action"
                    )
                );
            }
        }

        return response<GetOrgUserResponse>(res, {
            data: user,
            success: true,
            error: false,
            message: "User retrieved successfully",
            status: HttpCode.OK
        });
    } catch (error) {
        logger.error(error);
        return next(
            createHttpError(HttpCode.INTERNAL_SERVER_ERROR, "An error occurred")
        );
    }
}