import { Injectable } from '@nestjs/common';
import { OracleDBService } from 'src/db/db.service';
import * as oracledb from 'oracledb'

@Injectable()
export class SpContactsService {

    constructor(private readonly oracleDBService: OracleDBService) { }


    async insertSPContacts(
        p_spid: number,
        p_defcontactflag: string,
        p_firstname: string,
        p_lastname: string,
        P_MIDDLEINITIAL: string,
        p_title: string,
        p_phoneno: string,
        p_mobileno: string,
        p_faxno: string,
        p_emailaddress: string,
        p_user_id: string
    ) {
        let connection;
        try {
            // Connect to the Oracle database using oracledb 
            connection = await this.oracleDBService.getConnection()
            if (!connection) {
                throw new Error('No DB Connected')
            }

            const result = await connection.execute(
                `BEGIN
                   USCIB_Managed_Pkg.InsertSPContacts(
                    :p_spid,
                    :p_defcontactflag,
                    :p_firstname,
                    :p_lastname,
                    :P_MIDDLEINITIAL,
                    :p_title,
                    :p_phoneno,
                    :p_mobileno,
                    :p_faxno,
                    :p_emailaddress,
                    :p_user_id,
                    :p_cursor);
                 END;`, {
                p_spid: {
                    val: p_spid,
                    type: oracledb.DB_TYPE_NUMBER
                },
                p_defcontactflag: {
                    val: p_defcontactflag,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_firstname: {
                    val: p_firstname,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_lastname: {
                    val: p_lastname,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                P_MIDDLEINITIAL: {
                    val: P_MIDDLEINITIAL,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_title: {
                    val: p_title,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_phoneno: {
                    val: p_phoneno,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_mobileno: {
                    val: p_mobileno,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_faxno: {
                    val: p_faxno,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_emailaddress: {
                    val: p_emailaddress,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_user_id: {
                    val: p_user_id,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_cursor: {
                    type: oracledb.CURSOR,
                    dir: oracledb.BIND_OUT
                }
            }, {
                outFormat: oracledb.OUT_FORMAT_OBJECT
            }
            );

            await connection.commit();

            let fres = await result.outBinds.p_cursor.getRows();

            return fres

        } catch (err) {
            console.error('Error fetching users: ', err);
            return { error: err.message }
        } finally { }
    }

    async setSPDefaultcontact(p_spcontactid: number) {

        let connection;
        try {
            // Connect to the Oracle database using oracledb 
            connection = await this.oracleDBService.getConnection()
            if (!connection) {
                throw new Error('No DB Connected')
            }

            const result = await connection.execute(
                `BEGIN
                    USCIB_Managed_Pkg.SetDefaultContact(:p_spcontactid);
                END;`,
                {
                    p_spcontactid: {
                        val: p_spcontactid,
                        type: oracledb.DB_TYPE_NUMBER
                    },
                }
            );

            await connection.commit();

            return "SP executed successfully"

        } catch (err) {
            console.error('Error fetching users: ', err);
            return { error: err.message }
        } finally { }

    }

    async updateSPContacts(
        p_spcontactid: number,
        p_firstname: string,
        p_lastname: string,
        P_MIDDLEINITIAL: string,
        p_title: string,
        p_phoneno: string,
        p_mobileno: string,
        p_faxno: string,
        p_emailaddress: string,
        p_user_id: string,
    ) {
        let connection;
        try {
            // Connect to the Oracle database using oracledb 
            connection = await this.oracleDBService.getConnection()
            if (!connection) {
                throw new Error('No DB Connected')
            }

            const result = await connection.execute(
                `BEGIN
                   USCIB_Managed_Pkg.UpdateSPContacts(
                    :p_spcontactid,
                    :p_firstname,
                    :p_lastname,
                    :P_MIDDLEINITIAL,
                    :p_title,
                    :p_phoneno,
                    :p_mobileno,
                    :p_faxno,
                    :p_emailaddress,
                    :p_user_id,
                    :p_cursor);
                 END;`, {
                p_spcontactid: {
                    val: p_spcontactid,
                    type: oracledb.DB_TYPE_NUMBER
                },
                p_firstname: {
                    val: p_firstname,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_lastname: {
                    val: p_lastname,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                P_MIDDLEINITIAL: {
                    val: P_MIDDLEINITIAL,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_title: {
                    val: p_title,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_phoneno: {
                    val: p_phoneno,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_mobileno: {
                    val: p_mobileno,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_faxno: {
                    val: p_faxno,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_emailaddress: {
                    val: p_emailaddress,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_user_id: {
                    val: p_user_id,
                    type: oracledb.DB_TYPE_VARCHAR
                },
                p_cursor: {
                    type: oracledb.CURSOR,
                    dir: oracledb.BIND_OUT
                }
            }, {
                outFormat: oracledb.OUT_FORMAT_OBJECT
            }
            );

            await connection.commit();

            let fres = await result.outBinds.p_cursor.getRows();

            return fres

        } catch (err) {
            console.error('Error fetching users: ', err);
            return { error: err.message }
        } finally { }
    }

    async inactivateSPContact(p_spcontactid: number) {

        let connection;
        try {
            // Connect to the Oracle database using oracledb 
            connection = await this.oracleDBService.getConnection()
            if (!connection) {
                throw new Error('No DB Connected')
            }

            const result = await connection.execute(
                `BEGIN
                       USCIB_Managed_Pkg.InActivateSPContacts(:p_spcontactid);
                     END;`, {
                p_spcontactid: {
                    val: p_spcontactid,
                    type: oracledb.DB_TYPE_NUMBER
                }
            }
            );

            await connection.commit();

            return "SP executed successfully"

        } catch (err) {
            console.error('Error fetching users: ', err);
            return { error: err.message }
        } finally { }

    }

    async getSPDefaultcontacts(p_SPid: number) {

        let connection;
        let rows = [];
        try {
            // Connect to the Oracle database using oracledb 
            connection = await this.oracleDBService.getConnection()
            if (!connection) {
                throw new Error('No DB Connected')
            }

            const result = await connection.execute(
                `BEGIN
                    USCIB_Managed_Pkg.GetSPDefaultContacts(:p_SPid,:p_cursor);
                END;`,
                {
                    p_SPid: {
                        val: p_SPid,
                        type: oracledb.DB_TYPE_NUMBER,
                    },
                    p_cursor: {
                        type: oracledb.CURSOR,
                        dir: oracledb.BIND_OUT
                    }
                },
                {
                    outFormat: oracledb.OUT_FORMAT_OBJECT
                }
            );

            if (result.outBinds && result.outBinds.p_cursor) {
                const cursor = result.outBinds.p_cursor; // The OUT cursor
                let rowsBatch;

                do {
                    rowsBatch = await cursor.getRows(100); // Fetch 100 rows at a time
                    rows = rows.concat(rowsBatch); // Append fetched rows to the main array
                } while (rowsBatch.length > 0);

                // Close the cursor after you're done
                await cursor.close();
            } else {
                throw new Error('No cursor returned from the stored procedure');
            }

            return rows;

        } catch (err) {
            console.error('Error fetching users: ', err);
            return { error: err.message }
        } finally { }

    }

    async getSPcontacts() {
        let connection;
        let rows = [];
        try {
            // Connect to the Oracle database using oracledb 
            connection = await this.oracleDBService.getConnection()
            if (!connection) {
                throw new Error('No DB Connected')
            }

            const result = await connection.execute(
                `BEGIN
                    USCIB_Managed_Pkg.GetSPAllContacts(:p_cursor);
                END;`,
                {
                    p_cursor: {
                        type: oracledb.CURSOR,
                        dir: oracledb.BIND_OUT
                    }
                },
                {
                    outFormat: oracledb.OUT_FORMAT_OBJECT
                }
            );

            if (result.outBinds && result.outBinds.p_cursor) {
                const cursor = result.outBinds.p_cursor; // The OUT cursor
                let rowsBatch;

                do {
                    rowsBatch = await cursor.getRows(100); // Fetch 100 rows at a time
                    rows = rows.concat(rowsBatch); // Append fetched rows to the main array
                } while (rowsBatch.length > 0);

                console.log('Rows fetched:', rows);

                // Close the cursor after you're done
                await cursor.close();
            } else {
                throw new Error('No cursor returned from the stored procedure');
            }

            return rows;

        } catch (err) {
            console.error('Error fetching users: ', err);
            return { error: err.message }
        } finally { }
    }
}