import { Injectable, Logger } from '@nestjs/common';
import { OracleDBService } from 'src/db/db.service';
import * as oracledb from 'oracledb';
import {
  InsertNewServiceProviderDTO,
  UpdateServiceProviderDTO,
} from '../../../dto/sp/sp.dto';
import { BadRequestException } from 'src/exceptions/badRequest.exception';
import { InternalServerException } from 'src/exceptions/internalServerError.exception';
import { SPID_DTO } from 'src/dto/property.dto';

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

  constructor(private readonly oracleDBService: OracleDBService) { }

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

      const result = await connection.execute(
        `BEGIN
            USCIB_Managed_Pkg.InsertNewSP(
            :P_NAME,
            :p_lookupcode,
            :p_address1,
            :p_address2,
            :p_city,
            :p_state,
            :p_zip,
            :p_country,
            :p_issuingregion,
            :p_replacementregion,
            :p_bondsurety,
            :p_cargopolicyno,
            :p_cargosurety,
            :p_user_id,
            :P_NOTES,
            :P_FILEIDS,
            :p_cursor);
          END;`,
        {
          P_NAME: {
            val: body.P_NAME,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_lookupcode: {
            val: body.p_lookupCode,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_address1: {
            val: body.p_address1,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_address2: {
            val: body.p_address2,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_city: {
            val: body.p_city,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_state: {
            val: body.p_state,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_zip: {
            val: body.p_zip,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_country: {
            val: body.p_country,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_issuingregion: {
            val: body.p_issuingregion,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_replacementregion: {
            val: body.p_replacementregion,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_bondsurety: {
            val: body.p_bondsurety,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_cargopolicyno: {
            val: body.p_cargopolicyno,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_cargosurety: {
            val: body.p_cargosurety,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_user_id: {
            val: body.p_user_id,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          P_NOTES: {
            val: body.P_NOTES,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          P_FILEIDS: {
            val: body.P_FILEIDS,
            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.length>0 && fres[0].ERRORMESG) {
        this.logger.warn(fres[0].ERRORMESG);
        throw new BadRequestException(fres[0].ERRORMESG)
      }

      // return fres[0];
      return { statusCode: 201, message: "Createdted Successfully", ...fres[0] };
    } catch (error) {
      if (error instanceof BadRequestException) {
        this.logger.warn(error.message);
        throw error;
      }
      this.logger.error('insertNewServiceProvider 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 updateServiceProvider(body: UpdateServiceProviderDTO) {

    const newBody = {
      p_spid: null,
      p_name: null,
      p_lookupcode: null,
      p_address1: null,
      p_address2: null,
      p_city: null,
      p_state: null,
      p_zip: null,
      p_country: null,
      p_issuingregion: null,
      p_replacementregion: null,
      p_bondsurety: null,
      p_cargopolicyno: null,
      p_cargosurety: null,
      p_user_id: null
    };

    const reqBody = JSON.parse(JSON.stringify(body));

    function setEmptyStringsToNull(obj) {
      Object.keys(obj).forEach((key) => {
        if (typeof obj[key] === 'object' && obj[key] !== null) {
          setEmptyStringsToNull(obj[key]);
        } else if (obj[key] === '') {
          obj[key] = null;
        }
      });
    }

    setEmptyStringsToNull(reqBody);

    const finalBody: UpdateServiceProviderDTO = { ...newBody, ...reqBody };

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

      const result = await connection.execute(
        `BEGIN
          USCIB_Managed_Pkg.UpdateSP(
          :p_spid,
          :P_NAME,
          :p_lookupcode,
          :p_address1,
          :p_address2,
          :p_city,
          :p_state,
          :p_zip,
          :p_country,
          :p_bondsurety,
          :p_cargopolicyno,
          :p_cargosurety,
          :p_replacementregion,
          :p_issuingregion,
          :p_user_id,
          :P_NOTES,
          :P_FILEIDS,
          :p_cursor);
        END;`,
        {
          p_spid: {
            val: finalBody.p_spid,
            type: oracledb.DB_TYPE_NUMBER,
          },
          P_NAME: {
            val: finalBody.P_NAME,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_lookupcode: {
            val: finalBody.p_lookupCode,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_address1: {
            val: finalBody.p_address1,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_address2: {
            val: finalBody.p_address2,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_city: {
            val: finalBody.p_city,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_state: {
            val: finalBody.p_state,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_zip: {
            val: finalBody.p_zip,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_country: {
            val: finalBody.p_country,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_bondsurety: {
            val: finalBody.p_bondsurety,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_cargopolicyno: {
            val: finalBody.p_cargopolicyno,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_cargosurety: {
            val: finalBody.p_cargosurety,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_replacementregion: {
            val: finalBody.p_replacementregion,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_issuingregion: {
            val: finalBody.p_issuingregion,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          p_user_id: {
            val: finalBody.p_user_id,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          P_NOTES: {
            val: finalBody.P_NOTES,
            type: oracledb.DB_TYPE_VARCHAR,
          },
          P_FILEIDS: {
            val: finalBody.P_FILEIDS,
            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.length>0 && 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('updateServiceProvider 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 getAllServiceproviders() {
    let connection;
    let rows: any = [];
    try {
      connection = await this.oracleDBService.getConnection();
      if (!connection) {
        throw new InternalServerException();
      }

      const result = await connection.execute(
        `BEGIN
              USCIB_Managed_Pkg.GetAllSPs(: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;
        let rowsBatch;

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

        await cursor.close();

        if (rows.length > 0 && rows[0].ERRORMESG) {
          throw new BadRequestException(rows[0].ERRORMESG);
        }

        return rows;
      } else {
        throw new BadRequestException();
      }
    } catch (error) {
      if (error instanceof BadRequestException) {
        this.logger.warn(error.message);
        throw error;
      }
      this.logger.error('getAllServiceproviders 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 getServiceproviderByID(body: SPID_DTO) {
    let connection;
    let rows: any = [];
    try {
      connection = await this.oracleDBService.getConnection();
      if (!connection) {
        throw new InternalServerException();
      }

      const result = await connection.execute(
        `BEGIN
              USCIB_Managed_Pkg.GetSPbySPID(: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();
      }

      if (rows.length > 0 && rows[0].ERRORMESG) {
        throw new BadRequestException(rows[0].ERRORMESG);
      }

      return rows;
    } catch (error) {
      if (error instanceof BadRequestException) {
        this.logger.warn(error.message);
        throw error;
      }
      else if (error.message === "NJS-107: invalid cursor") {
        this.logger.warn(error.message);
        throw new BadRequestException();
      }
      this.logger.error('getServiceproviderByID 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);
        }
      }
    }
  }
}