import { Injectable } from '@nestjs/common';

import {
    CarnetProcessingCenterDTO, SaveCarnetApplicationDTO, TransmitApplicationtoProcessDTO,
    CreateApplicationDTO,
    UpdateExpGoodsAuthRepDTO,
    AddGenerallistItemsDTO,
    AddCountriesDTO,
    UpdateShippingDetailsDTO,
    CA_UpdateHolderDTO,
    GetCarnetControlCenterDTO,
    DeleteGenerallistItemsDTO,
    PrintCarnetDTO,
    PrintGLDTO,
    YON,
    CopyCarnetDTO,
    GetExtendedSectionDTO,
    SaveExtensionApplicationDTO,
    CarnetProcessingCenterDTO2,
    CapturePaymentDTO,
    InitiatePaymentDTO,
    GetOrderDetailsDTO,
    GetPaymentHistoryDTO,
    SaveHistoryDTO
} from 'src/dto/property.dto';
import { BadRequestException } from 'src/exceptions/badRequest.exception';
import { PoolClient } from 'pg';
import { PgDBService } from 'src/db/db.service';
import { checkPgUserDefinedErrors, handlePgError, releasePgClient, ResponseStatus } from 'src/utils/helper';

@Injectable()
export class CarnetApplicationService {

    constructor(private readonly pgDBService: PgDBService) { }

    // [ CARNETAPPLICATION_PKG ]

    // async SaveCarnetApplication(body: SaveCarnetApplicationDTO) { }
    async TransmitApplicationtoProcess(body: TransmitApplicationtoProcessDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            const callProcQuery = `
                                    CALL "CARNETSYS".carnetapplication_pkg_transmitapplicationtoprocess($1, $2, $3, $4)
                                `;
            await client.query(callProcQuery, [body.P_SPID, body.P_USERID, body.P_HEADERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            checkPgUserDefinedErrors(fetchResult);

            return {
                statusCode: 200,
                message: ResponseStatus.transmitted,
                ...fetchResult?.rows?.[0] || {}
            };

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async CreateApplication(body: CreateApplicationDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            const callProcQuery = `
                                    CALL "CARNETSYS".carnetapplication_pkg_createapplication($1, $2, $3, $4, $5, $6, $7)
                                `;
            await client.query(callProcQuery, [body.P_SPID, body.P_CLIENTID, body.P_LOCATIONID, body.P_USERID, body.P_APPLICATIONNAME, body.P_ORDERTYPE, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            checkPgUserDefinedErrors(fetchResult);

            return {
                statusCode: 201,
                message: ResponseStatus.created,
                ...fetchResult?.rows?.[0] || {}
            };

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async UpdateHolder(body: CA_UpdateHolderDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            const callProcQuery = `
                                    CALL "CARNETSYS".carnetapplication_pkg_updateholder($1, $2, $3)
                                `;
            await client.query(callProcQuery, [body.P_HEADERID, body.P_HOLDERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            checkPgUserDefinedErrors(fetchResult);

            return {
                statusCode: 200,
                message: ResponseStatus.updated,
                ...fetchResult?.rows?.[0] || {}
            };

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async UpdateExpGoodsAuthRep(body: UpdateExpGoodsAuthRepDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            const callProcQuery = `
                                    CALL "CARNETSYS".carnetapplication_pkg_updateexpgoodsauthrep($1, $2, $3, $4, $5, $6, $7, $8)
                                `;
            await client.query(callProcQuery, [body.P_HEADERID, body.P_COMMERCIALSAMPLEFLAG, body.P_PROFEQUIPMENTFLAG, body.P_EXHIBITIONSFAIRFLAG, body.P_AUTOFLAG, body.P_HORSEFLAG, body.P_AUTHREP, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            checkPgUserDefinedErrors(fetchResult);

            return {
                statusCode: 200,
                message: ResponseStatus.updated,
                ...fetchResult?.rows?.[0] || {}
            };

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async AddGenerallistItems(body: AddGenerallistItemsDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            function escapePostgresString(str: string): string {
                if (str == null) return '';
                return `"${str.replace(/\\/g, '\\\\').replace(/"/g, '\\"')}"`;
            }

            function escapePostgresValue(val: any): string {
                if (val == null || val === '') return ''; // NULL or empty becomes empty string
                if (typeof val === 'number') return String(val); // pass numbers as-is
                return escapePostgresString(String(val)); // quote and escape strings
            }

            const contactLiterals = body.P_GLTABLE.map(c => {
                const fields = [
                    escapePostgresValue(c.ITEMNO),               // integer
                    escapePostgresValue(c.ITEMDESCRIPTION),      // varchar
                    escapePostgresValue(c.ITEMVALUE),            // numeric
                    escapePostgresValue(c.NOOFPIECES),           // integer
                    escapePostgresValue(c.ITEMWEIGHT),           // numeric
                    escapePostgresValue(c.ITEMWEIGHTUOM),        // varchar
                    escapePostgresValue(c.GOODSORIGINCOUNTRY),   // varchar
                ];

                return `(${fields.join(',')})`; // composite literal without outer double quotes
            });

            const pgArrayLiteral = `{${contactLiterals.join(',')}}`;

            const callProcQuery = `
                                    CALL "CARNETSYS".carnetapplication_pkg_addgenerallistitems($1, $2::"CARNETSYS".gltable[], $3, $4)
                                `;
            await client.query(callProcQuery, [body.P_HEADERID, pgArrayLiteral, body.P_USERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            checkPgUserDefinedErrors(fetchResult);

            return {
                statusCode: 200,
                message: ResponseStatus.added,
                ...fetchResult?.rows?.[0] || {}
            };

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async EditGenerallistItems(body: AddGenerallistItemsDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            function escapePostgresString(str: string): string {
                if (str == null) return '';
                return `"${str.replace(/\\/g, '\\\\').replace(/"/g, '\\"')}"`;
            }

            function escapePostgresValue(val: any): string {
                if (val == null || val === '') return ''; // NULL or empty becomes empty string
                if (typeof val === 'number') return String(val); // pass numbers as-is
                return escapePostgresString(String(val)); // quote and escape strings
            }

            const contactLiterals = body.P_GLTABLE.map(c => {
                const fields = [
                    escapePostgresValue(c.ITEMNO),               // integer
                    escapePostgresValue(c.ITEMDESCRIPTION),      // varchar
                    escapePostgresValue(c.ITEMVALUE),            // numeric
                    escapePostgresValue(c.NOOFPIECES),           // integer
                    escapePostgresValue(c.ITEMWEIGHT),           // numeric
                    escapePostgresValue(c.ITEMWEIGHTUOM),        // varchar
                    escapePostgresValue(c.GOODSORIGINCOUNTRY),   // varchar
                ];

                return `(${fields.join(',')})`; // composite literal without outer double quotes
            });

            const pgArrayLiteral = `{${contactLiterals.join(',')}}`;

            const callProcQuery = `
                                    CALL "CARNETSYS".carnetapplication_pkg_editgenerallistitems($1, $2::"CARNETSYS".gltable[], $3, $4)
                                `;
            await client.query(callProcQuery, [body.P_HEADERID, pgArrayLiteral, body.P_USERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            checkPgUserDefinedErrors(fetchResult);

            return {
                statusCode: 200,
                message: ResponseStatus.updated,
                ...fetchResult?.rows?.[0] || {}
            };

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async DeleteGenerallistItems(body: DeleteGenerallistItemsDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            const callProcQuery = `
                                    CALL "CARNETSYS".carnetapplication_pkg_deletegenerallistitems($1, $2, $3, $4)
                                `;
            await client.query(callProcQuery, [body.P_HEADERID, body.P_ITEMNO, body.P_USERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            checkPgUserDefinedErrors(fetchResult);

            return {
                statusCode: 200,
                message: ResponseStatus.deleted,
                ...fetchResult?.rows?.[0] || {}
            };

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async AddCountries(body: AddCountriesDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            function escapePostgresString(str: string): string {
                if (str == null) return '';
                return `"${str.replace(/\\/g, '\\\\').replace(/"/g, '\\"')}"`;
            }

            function escapePostgresValue(val: any): string {
                if (val == null || val === '') return ''; // NULL or empty becomes empty string
                if (typeof val === 'number') return String(val); // pass numbers as-is
                return escapePostgresString(String(val)); // quote and escape strings
            }

            const contactLiterals = body.P_COUNTRYTABLE.map(c => {
                const fields = [
                    escapePostgresValue(c.P_VISISTTRANSITIND),               // integer
                    escapePostgresValue(c.COUNTRYCODE),      // varchar
                    escapePostgresValue(c.NOOFTIMESENTLEAVE),            // numeric
                ];

                return `(${fields.join(',')})`; // composite literal without outer double quotes
            });

            const pgArrayLiteral = `{${contactLiterals.join(',')}}`;

            const callProcQuery = `
                                    CALL "CARNETSYS".carnetapplication_pkg_addcountries($1, $2, $3::"CARNETSYS".carnetcountrytable[], $4, $5)
                                `;
            await client.query(callProcQuery, [body.P_HEADERID, body.P_USSETS, pgArrayLiteral, body.P_USERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            checkPgUserDefinedErrors(fetchResult);

            return {
                statusCode: 200,
                message: ResponseStatus.added,
                ...fetchResult?.rows?.[0] || {}
            };

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async UpdateShippingDetails(body: UpdateShippingDetailsDTO) { }
    
    async EstimatedFees(body: GetCarnetControlCenterDTO) { }

    // processing [ PROCESSINGCENTER_PKG ]

    async ProcessCarnet(body: CarnetProcessingCenterDTO) { }
    async UpdatePrintCarnet(body: CarnetProcessingCenterDTO) { }
    async VoidCarnet(body: CarnetProcessingCenterDTO) { }

    async CopyCarnet(body: CopyCarnetDTO) { }
    async DuplicateCarnet(body: CarnetProcessingCenterDTO2) { }
    async AddlSets(body: CarnetProcessingCenterDTO2) { }
    async ExtendCarnet(body: CarnetProcessingCenterDTO2) { }
    async GetExtendedSection(body: GetExtendedSectionDTO) { }
    async SaveExtensionApplication(body: SaveExtensionApplicationDTO) { }

    async CloseCarnet(body: CarnetProcessingCenterDTO) { }
    async ResetCarnet(body: CarnetProcessingCenterDTO) { }
    async DeleteCarnet(body: CarnetProcessingCenterDTO) { }

    // [ CARNETCONTROLCENTER_PKG ]

    async GetHolderstoEdit(body: GetCarnetControlCenterDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".carnetcontrolcenter_pkg_getholderstoedit($1, $2, $3, $4)
                            `;
            await client.query(callProcQuery, [body.P_SPID, body.P_USERID, body.P_HEADERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            return fetchResult.rows;

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async GetGoodsDetailstoEdit(body: GetCarnetControlCenterDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".carnetcontrolcenter_pkg_getgoodsdetailstoedit($1, $2, $3, $4)
                            `;
            await client.query(callProcQuery, [body.P_SPID, body.P_USERID, body.P_HEADERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            return fetchResult.rows;

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async GetCountryDetailstoEdit(body: GetCarnetControlCenterDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".carnetcontrolcenter_pkg_getcountrydetailstoedit($1, $2, $3, $4)
                            `;
            await client.query(callProcQuery, [body.P_SPID, body.P_USERID, body.P_HEADERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            return fetchResult.rows;

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async GetShipPaymentDetailstoEdit(body: GetCarnetControlCenterDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".carnetcontrolcenter_pkg_getshippaymentdetailstoedit($1, $2, $3, $4)
                            `;
            await client.query(callProcQuery, [body.P_SPID, body.P_USERID, body.P_HEADERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            return fetchResult.rows;

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    async GetGoodsItemstoEdit(body: GetCarnetControlCenterDTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

        try {
            client = await this.pgDBService.getConnection();

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".carnetcontrolcenter_pkg_getgoodsitemstoedit($1, $2, $3, $4)
                            `;
            await client.query(callProcQuery, [body.P_SPID, body.P_USERID, body.P_HEADERID, cursorName]);

            // 🚫 DON'T quote the cursor name in FETCH
            const fetchResult = await client.query(`FETCH ALL FROM ${cursorName}`);

            // 🚫 DON'T quote the cursor name in CLOSE
            await client.query(`CLOSE ${cursorName}`);
            await client.query('COMMIT');

            return fetchResult.rows;

        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, CarnetApplicationService.name)
        } finally {
            releasePgClient(client)
        }
    }

    // [PRINT_PKG]

    async getPrintingData(body: PrintCarnetDTO) { }

    async PrintCarnet(body: PrintCarnetDTO) { }

    async PrintGL(body: PrintGLDTO) { }

    // [payment]

    async formatAmount(amount) {
        if (typeof amount !== 'number' || isNaN(amount)) {
            throw new Error('Amount must be a valid number');
        }

        if (amount < 0) {
            throw new BadRequestException('Amount must be non-negative');
        }

        return amount.toFixed(2); // Always returns a string with 2 decimal places
    }

    async InitiatePayment(body: InitiatePaymentDTO) { }

    async CapturePayment(body: CapturePaymentDTO) { }

    async OrderDetails(body: GetOrderDetailsDTO) { }

    async GetPaymentHistory(body: GetPaymentHistoryDTO) { }

    async SaveHistory(body: SaveHistoryDTO) { }
}