import { Injectable, Logger } from '@nestjs/common';
import { OracleDBService } from 'src/db/db.service';
import * as oracledb from 'oracledb';
import {
  getSPAllContactsDTO,
  getSPDefaultcontactDTO,
  inactivateSPContactDTO,
  InsertSPContactsDTO,
  setSPDefaultcontactDTO,
  UpdateSPContactsDTO,
} from './sp-contacts.dto';
import { BadRequestException } from 'src/exceptions/badRequest.exception';
import { InternalServerException } from 'src/exceptions/internalServerError.exception';

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

  constructor(private readonly oracleDBService: OracleDBService) { }

  async insertSPContacts(body: InsertSPContactsDTO) {
    let connection;
    try {
      connection = await this.oracleDBService.getConnection();
      if (!connection) {
        throw new InternalServerException();
      }

      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: body.p_spid,
            type: oracledb.DB_TYPE_NUMBER,
          },
          p_defcontactflag: {
            val: body.p_defcontactflag,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_firstname: {
            val: body.p_firstname,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_lastname: {
            val: body.p_lastname,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          P_MIDDLEINITIAL: {
            val: body.P_MIDDLEINITIAL,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_title: {
            val: body.p_title,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_phoneno: {
            val: body.p_phoneno,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_mobileno: {
            val: body.p_mobileno,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_faxno: {
            val: body.p_faxno,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_emailaddress: {
            val: body.p_emailaddress,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_user_id: {
            val: body.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();

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

      if (fres[0].ERRORMESG) {
        this.logger.warn(fres[0].ERRORMESG);
        throw new BadRequestException(fres[0].ERRORMESG)
      }

      return { statusCode: 201, message: "Createdted Successfully", ...fres[0] };
    } catch (error) {
      if (error instanceof BadRequestException) {
        throw error;
      }
      this.logger.error('insertSPContacts failed', error.stack || error);
      throw new InternalServerException();
    } finally {
      if (connection) {
        try {
          await connection.close();
        } catch (closeErr) {
          this.logger.error('Failed to close DB connection', closeErr);
        }
      }
    }
  }

  async setSPDefaultcontact(body: setSPDefaultcontactDTO) {
    let connection;
    try {
      connection = await this.oracleDBService.getConnection();
      if (!connection) {
        throw new InternalServerException();
      }

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

      await connection.commit();

      return { statusCode: 200, message: 'Default contact was added successfully for SP' };
    } catch (error) {
      this.logger.error('setSPDefaultcontact failed', error.stack || error);
      throw new InternalServerException();
    } finally {
      if (connection) {
        try {
          await connection.close();
        } catch (closeErr) {
          this.logger.error('Failed to close DB connection', closeErr);
        }
      }
    }
  }

  async updateSPContacts(body: UpdateSPContactsDTO) {
    let connection;
    try {
      connection = await this.oracleDBService.getConnection();
      if (!connection) {
        throw new InternalServerException();
      }

      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: body.p_spcontactid,
            type: oracledb.DB_TYPE_NUMBER,
          },
          p_firstname: {
            val: body.p_firstname,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_lastname: {
            val: body.p_lastname,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          P_MIDDLEINITIAL: {
            val: body.P_MIDDLEINITIAL,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_title: {
            val: body.p_title,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_phoneno: {
            val: body.p_phoneno,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_mobileno: {
            val: body.p_mobileno,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_faxno: {
            val: body.p_faxno,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_emailaddress: {
            val: body.p_emailaddress,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_user_id: {
            val: body.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();

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

      if (fres[0].ERRORMESG) {
        this.logger.warn(fres[0].ERRORMESG);
        throw new BadRequestException(fres[0].ERRORMESG)
      }

      return { statusCode: 200, message: "Updated Successfully" };
    } catch (error) {
      if (error instanceof BadRequestException) {
        this.logger.warn(error.message);
        throw error;
      }
      this.logger.error('updateSPContacts failed', error.stack || error);
      throw new InternalServerException();
    } finally {
      if (connection) {
        try {
          await connection.close();
        } catch (closeErr) {
          this.logger.error('Failed to close DB connection', closeErr);
        }
      }
    }
  }

  async inactivateSPContact(body: inactivateSPContactDTO) {
    let connection;
    try {
      connection = await this.oracleDBService.getConnection();
      if (!connection) {
        throw new InternalServerException();
      }

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

      await connection.commit();

      return { statusCode: 200, message: 'Inactivated SP contact successfully' };
    } catch (error) {
      this.logger.error('inactivateSPContact failed', error.stack || error);
      throw new InternalServerException();
    } finally {
      if (connection) {
        try {
          await connection.close();
        } catch (closeErr) {
          this.logger.error('Failed to close DB connection', closeErr);
        }
      }
    }
  }

  async getSPDefaultcontacts(body: getSPDefaultcontactDTO) {
    let connection;
    let rows = [];
    try {
      connection = await this.oracleDBService.getConnection();
      if (!connection) {
        throw new InternalServerException();
      }

      const result = await connection.execute(
        `BEGIN
              USCIB_Managed_Pkg.GetSPDefaultContacts(:p_SPid,:p_cursor);
          END;`,
        {
          p_SPid: {
            val: body.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;
        let rowsBatch;

        do {
          rowsBatch = await cursor.getRows(100);
          rows = rows.concat(rowsBatch);
        } while (rowsBatch.length > 0);

        await cursor.close();
      } else {
        throw new BadRequestException();
      }

      return rows;
    } catch (error) {
      this.logger.error('getSPDefaultcontacts failed', error.stack || error);
      throw new InternalServerException();
    } finally {
      if (connection) {
        try {
          await connection.close();
        } catch (closeErr) {
          this.logger.error('Failed to close DB connection', closeErr);
        }
      }
    }
  }

  async getSPAllContacts(body: getSPAllContactsDTO) {

    let connection;
    let rows = [];
    try {
      connection = await this.oracleDBService.getConnection();
      if (!connection) {
        throw new InternalServerException();
      }

      const result = await connection.execute(
        `BEGIN
            USCIB_Managed_Pkg.GetSPAllContacts(:p_SPid,:p_cursor);
          END;`,
        {
          p_SPid: {
            val: body.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;
        let rowsBatch;

        do {
          rowsBatch = await cursor.getRows(100);
          rows = rows.concat(rowsBatch);
        } while (rowsBatch.length > 0);

        await cursor.close();
      } else {
        throw new BadRequestException();
      }

      return rows;
    } catch (error) {
      this.logger.error('getSPAllContacts failed', error.stack || error);
      throw new InternalServerException();
    } finally {
      if (connection) {
        try {
          await connection.close();
        } catch (closeErr) {
          this.logger.error('Failed to close DB connection', closeErr);
        }
      }
    }
  }
}