import { forwardRef, Inject, Injectable, Logger } from '@nestjs/common';
import { CreateClientLoginsDTO, CreateSPLoginsDTO, CreateUSCIBLoginsDTO, EMAIL_DTO, SPID_CLIENTID_DTO, SPID_DTO, SPID_EMAIL_DTO, USERID_DTO } from 'src/dto/property.dto';
import { checkPgUserDefinedErrors, handlePgError, normalizeKeysToUpperCase, releasePgClient, ResponseStatus, toUpperCaseKeys } from 'src/utils/helper';

import { PoolClient } from 'pg';
import { PgDBService } from 'src/db/db.service';
import { InternalServerException } from 'src/exceptions/internalServerError.exception';
import { AuthService } from 'src/auth/auth.service';
import { MailTypeDTO } from 'src/auth/auth.dto';

@Injectable()
export class UserMaintenanceService {

    private readonly logger = new Logger(UserMaintenanceService.name);

    constructor(
        private readonly pgDBService: PgDBService,
        @Inject(forwardRef(() => AuthService))
        private readonly authService: AuthService
    ) { }

    async GetSPUserDetails(body: USERID_DTO): Promise<any> {
        let client: PoolClient | null = null;

        // Assign unique names to each cursor
        const roleCursor = 'role_cursor';
        const menuCursor = 'menu_cursor';
        const menuPageCursor = 'menu_page_cursor';
        const userDetailsCursor = 'user_details_cursor';

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

            const callProcQuery = `
            CALL "CARNETSYS".spclientuser_pkg_getspuserdetails($1, $2, $3, $4, $5)
        `;

            await client.query(callProcQuery, [
                body.P_USERID,
                roleCursor,
                menuCursor,
                menuPageCursor,
                userDetailsCursor
            ]);

            // Fetch all data from each cursor
            const roleResult = await client.query(`FETCH ALL FROM ${roleCursor}`);
            const menuResult = await client.query(`FETCH ALL FROM ${menuCursor}`);
            const menuPageResult = await client.query(`FETCH ALL FROM ${menuPageCursor}`);
            const userDetailsResult = await client.query(`FETCH ALL FROM ${userDetailsCursor}`);

            // Close all cursors
            await client.query(`CLOSE ${roleCursor}`);
            await client.query(`CLOSE ${menuCursor}`);
            await client.query(`CLOSE ${menuPageCursor}`);
            await client.query(`CLOSE ${userDetailsCursor}`);

            await client.query('COMMIT');
            
            checkPgUserDefinedErrors(roleResult);
            checkPgUserDefinedErrors(menuResult);
            checkPgUserDefinedErrors(menuPageResult);
            checkPgUserDefinedErrors(userDetailsResult);

            return {
                roleDetails: toUpperCaseKeys(roleResult.rows),
                menuDetails: toUpperCaseKeys(menuResult.rows),
                menuPageDetails: toUpperCaseKeys(menuPageResult.rows),
                userDetails: toUpperCaseKeys(userDetailsResult.rows),
            };
        } catch (error) {
            if (client) await client.query('ROLLBACK');
            handlePgError(error, 'getSpUserDetails');
        } finally {
            releasePgClient(client);
        }
    }

    async LockUserAccount(body: SPID_EMAIL_DTO) {

        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

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

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".userlogin_pkg_lockuseraccount($1, $2, $3)
                            `;
            await client.query(callProcQuery,
                [
                    body.P_SPID,
                    body.P_EMAILADDR,
                    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.lockedUserDone,
                ...toUpperCaseKeys(fetchResult?.rows)[0]
            };

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

    }

    // USCIB_LOGINS

    async GetUSCIBLogins() {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

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

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".userlogin_pkg_getusciblogins($1)
                            `;
            await client.query(callProcQuery, [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 toUpperCaseKeys(fetchResult.rows);

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

    async CreateUSCIBLogins(body: CreateUSCIBLoginsDTO) {

        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

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

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".userlogin_pkg_createusciblogins($1, $2, $3, $4, $5)
                            `;
            await client.query(callProcQuery,
                [
                    body.P_USERID,
                    body.P_EMAILADDR,
                    body.P_LOOKUPCODE,
                    body.P_ENABLEPASSWORDPOLICY,
                    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,
                ...toUpperCaseKeys(fetchResult?.rows)[0]
            };

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

    // SP LOGINS

    async GetSPLogins(body: SPID_DTO) {

        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

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

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".userlogin_pkg_getsplogins($1, $2)
                            `;
            await client.query(callProcQuery, [body.P_SPID, 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 toUpperCaseKeys(fetchResult.rows);

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

    }

    async CreateSPLogins(body: CreateSPLoginsDTO) {

        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

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

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".userlogin_pkg_createsplogins($1, $2, $3, $4, $5, $6, $7)
                            `;
            await client.query(callProcQuery,
                [
                    body.P_SPID,
                    body.P_USERID,
                    body.P_DOMAIN,
                    body.P_EMAILADDR,
                    body.P_LOOKUPCODE,
                    body.P_ENABLEPASSWORDPOLICY,
                    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);

            const mailRes = await this.authService.sendMail({ P_TO: body.P_USERID, P_MAIL_TYPE: MailTypeDTO.REGISTER_SP })

            if (mailRes.statusCode !== 200) {
                throw new InternalServerException();
            }

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

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

    // CLIENT LOGINS

    async GetClientloginsBySPID(body: SPID_DTO) {

        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

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

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".userlogin_pkg_getclientloginsbyspid($1, $2)
                            `;
            await client.query(callProcQuery, [body.P_SPID, 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 toUpperCaseKeys(fetchResult.rows);

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

    async GetClientloginsByClientID(body: SPID_CLIENTID_DTO) {
        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

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

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".userlogin_pkg_getclientloginsbyclientid($1, $2, $3)
                            `;
            await client.query(callProcQuery, [body.P_SPID, body.P_CLIENTID, 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 toUpperCaseKeys(fetchResult.rows);

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

    async CreateClientLogins(body: CreateClientLoginsDTO) {

        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

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

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".userlogin_pkg_createclientlogins($1, $2, $3, $4, $5)
                            `;
            await client.query(callProcQuery,
                [
                    body.P_SPID,
                    body.P_USERID,
                    body.P_CLIENTCONTACTID,
                    body.P_ENABLEPASSWORDPOLICY,
                    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);

            const mailRes = await this.authService.sendMail({ P_TO: body.P_USERID, P_MAIL_TYPE: MailTypeDTO.REGISTER_CLIENT })

            if (mailRes.statusCode !== 200) {
                throw new InternalServerException();
            }

            return {
                statusCode: 201,
                message: ResponseStatus.clientRegistrationDone,
                ...toUpperCaseKeys(fetchResult?.rows)[0]
            };

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

    // validate email

    async ValidateEmail(body: EMAIL_DTO) {

        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

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

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".userlogin_pkg_validateemail($1, $2)
                            `;
            await client.query(callProcQuery, [body.P_EMAILADDR, 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);

            if (fetchResult?.rows.length > 0) {
                return [toUpperCaseKeys(fetchResult.rows)[0]]
            }
            else {
                return [];
            }


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

    }

    //carnet summary data
    async GetCarnetSummaryData(body: USERID_DTO) {

        let client: PoolClient | null = null;

        const cursorName = 'p_cursor';

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

            await client.query('BEGIN');

            const callProcQuery = `
                                CALL "CARNETSYS".userlogin_pkg_getcarnetsummarydata($1, $2)
                            `;
            await client.query(callProcQuery, [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 toUpperCaseKeys(fetchResult.rows);

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