import { Injectable, Logger } from "@nestjs/common";
import { OracleDBService } from "src/db/db.service";
import { COUNTRYTABLE_DTO, COUNTRYTABLE_ROW_DTO, GLTABLE_DTO, GLTABLE_ROW_DTO } from "src/dto/property.dto";
import { InternalServerException } from "src/exceptions/internalServerError.exception";
import { closeOracleDbConnection, handleError } from "src/utils/helper";

@Injectable()
export class OracleService {
    private readonly logger = new Logger(OracleService.name);

    constructor(private readonly oracleDBService: OracleDBService) { }

    async get_GL_TABLE_INSTANCE(finalBody: any) {

        // P_GLTABLE: { val: GLTABLE_INSTANCE, type: 'CARNETSYS.GLTABLE' }
        // P_GLTABLE: { val: GLTABLE_INSTANCE, type: oracledb.DB_TYPE_OBJECT }

        let connection;

        try {
            connection = await this.oracleDBService.getConnection();

            const GLTABLE = await connection.getDbObjectClass('CARNETSYS.GLTABLE');

            if (typeof GLTABLE !== 'function') {
                throw new InternalServerException('GLTABLE is not a constructor');
            }

            async function createGLArrayInstance(
                ITEMNO, ITEMDESCRIPTION, ITEMVALUE, NOOFPIECES,
                ITEMWEIGHT, ITEMWEIGHTUOM, GOODSORIGINCOUNTRY,
            ) {
                const result = await connection.execute(
                    `SELECT CARNETSYS.GLARRAY(
                        :ITEMNO, :ITEMDESCRIPTION, :ITEMVALUE, :NOOFPIECES, 
                        :ITEMWEIGHT, :ITEMWEIGHTUOM, :GOODSORIGINCOUNTRY
                    ) FROM dual`,
                    {
                        ITEMNO, ITEMDESCRIPTION, ITEMVALUE, NOOFPIECES,
                        ITEMWEIGHT, ITEMWEIGHTUOM, GOODSORIGINCOUNTRY,
                    }
                );
                console.log(result.rows);

                return result.rows[0][0];
            }

            const GLTABLE_ARRAY: GLTABLE_DTO = {
                P_GLTABLE: await Promise.all(
                    (finalBody.P_GLTABLE ?? []).map(async (x: GLTABLE_ROW_DTO) => {
                        return await createGLArrayInstance(
                            x.ITEMNO, x.ITEMDESCRIPTION, x.ITEMVALUE, x.NOOFPIECES,
                            x.ITEMWEIGHT, x.ITEMWEIGHTUOM, x.GOODSORIGINCOUNTRY,
                        );
                    })
                )
            };

            const GLTABLE_INSTANCE = new GLTABLE(GLTABLE_ARRAY.P_GLTABLE ?? []);

            return GLTABLE_INSTANCE;

        } catch (error) {
            throw new Error("Error occured completing this process")
        } finally {
            await closeOracleDbConnection(connection, OracleService.name)
        }
    }

    async get_COUNTRY_TABLE_INSTANCE(finalBody: any) {

        // P_COUNTRYTABLE: { val: COUNTRYTABLE_INSTANCE, type: 'CARNETSYS.CARNETCOUNTRYTABLE' }
        // P_COUNTRYTABLE: { val: COUNTRYTABLE_INSTANCE, type: oracledb.DB_TYPE_OBJECT }

        let connection;

        try {
            connection = await this.oracleDBService.getConnection();

            const COUNTRYTABLE = await connection.getDbObjectClass('CARNETSYS.CARNETCOUNTRYTABLE');

            if (typeof COUNTRYTABLE !== 'function') {
                throw new Error('COUNTRYTABLE is not a constructor');
            }

            async function createCarnetCountryArrayInstance(
                P_VISISTTRANSITIND, COUNTRYCODE, NOOFTIMESENTLEAVE,
            ) {
                const result = await connection.execute(
                    `SELECT CARNETSYS.CARNETCOUNTRYARRAY(
                        :P_VISISTTRANSITIND, :COUNTRYCODE, :NOOFTIMESENTLEAVE
                    ) FROM dual`,
                    {
                        P_VISISTTRANSITIND, COUNTRYCODE, NOOFTIMESENTLEAVE,
                    },
                );
                console.log(result.rows);
                return result.rows[0][0];
            }

            const COUNTRYTABLE_ARRAY: COUNTRYTABLE_DTO = {
                P_COUNTRYTABLE: await Promise.all(
                    (finalBody.P_COUNTRYTABLE ?? []).map(async (x: COUNTRYTABLE_ROW_DTO) => {
                        return await createCarnetCountryArrayInstance(
                            x.P_VISISTTRANSITIND, x.COUNTRYCODE, x.NOOFTIMESENTLEAVE,
                        );
                    })
                )
            };

            const COUNTRYTABLE_INSTANCE = new COUNTRYTABLE(COUNTRYTABLE_ARRAY.P_COUNTRYTABLE ?? []);

            return COUNTRYTABLE_INSTANCE;

        } catch (error) {
            throw new Error("Error occured completing this process")
        } finally {
            await closeOracleDbConnection(connection, OracleService.name)
        }
    }
}