import get from "../../actions/get";
import post from "../../actions/post";
import sqlGenerator from "../../functions/dsql/sql/sql-generator";
import { DsqlCrudParam, PostReturn } from "../../types";
import connDbHandler, { ConnDBHandlerQueryObject } from "../db/conn-db-handler";

export default async function dsqlCrud<
    T extends { [key: string]: any } = { [key: string]: any }
>({
    action,
    data,
    table,
    targetValue,
    query,
    sanitize,
    debug,
    targetField,
    targetId,
    count,
}: DsqlCrudParam<T>): Promise<
    | (PostReturn & {
          queryObject?: ReturnType<Awaited<typeof sqlGenerator>>;
          count?: number;
      })
    | null
> {
    const finalData = sanitize ? sanitize(data) : data;
    let queryObject: ReturnType<Awaited<typeof sqlGenerator>> | undefined;

    switch (action) {
        case "get":
            queryObject = sqlGenerator({
                tableName: table,
                genObject: query,
            });

            const DB_CONN =
                global.DSQL_READ_ONLY_DB_CONN || global.DSQL_DB_CONN;

            const connQueries: ConnDBHandlerQueryObject[] = [
                {
                    query: queryObject?.string,
                    values: queryObject?.values || [],
                },
            ];

            if (count) {
                const countQueryObject = sqlGenerator({
                    tableName: table,
                    genObject: query,
                    count: true,
                });

                connQueries.push({
                    query: countQueryObject.string,
                    values: countQueryObject.values,
                });
            }

            const res = await connDbHandler(DB_CONN, connQueries);

            const isSuccess = Array.isArray(res) && Array.isArray(res[0]);

            return {
                success: isSuccess,
                payload: isSuccess ? res[0] : null,
                error: isSuccess ? undefined : res?.error,
                queryObject,
                count:
                    isSuccess && res[1]?.[0]?.["COUNT(*)"]
                        ? res[1][0]["COUNT(*)"]
                        : undefined,
            };

        case "insert":
            return await post({
                query: {
                    action: "insert",
                    table,
                    data: finalData,
                },
                forceLocal: true,
            });

        case "update":
            delete data?.id;

            return await post({
                query: {
                    action: "update",
                    table,
                    identifierColumnName: targetField || "id",
                    identifierValue: String(targetValue || targetId),
                    data: finalData,
                },
                forceLocal: true,
            });

        case "delete":
            return await post({
                query: {
                    action: "delete",
                    table,
                    identifierColumnName: targetField || "id",
                    identifierValue: String(targetValue || targetId),
                },
                forceLocal: true,
            });

        default:
            return null;
    }
}