import { opendirSync, readFileSync } from 'fs';
import { join } from 'path';
import { ConfigService, StoreConf } from '../../config/env.config';
import { ContactRaw, IContactModel } from '../models';
import { IInsert, Repository } from '../abstract/abstract.repository';
import { Logger } from '../../config/logger.config';

export class ContactQuery {
  where: ContactRaw;
}

export class ContactRepository extends Repository {
  constructor(
    private readonly contactModel: IContactModel,
    private readonly configService: ConfigService,
  ) {
    super(configService);
  }

  private readonly logger = new Logger('ContactRepository');

  public async insert(
    data: ContactRaw[],
    instanceName: string,
    saveDb = false,
  ): Promise<IInsert> {
    this.logger.verbose('inserting contacts');

    if (data.length === 0) {
      this.logger.verbose('no contacts to insert');
      return;
    }

    try {
      if (this.dbSettings.ENABLED && saveDb) {
        this.logger.verbose('saving contacts to db');

        const insert = await this.contactModel.insertMany([...data]);

        this.logger.verbose('contacts saved to db: ' + insert.length + ' contacts');
        return { insertCount: insert.length };
      }

      this.logger.verbose('saving contacts to store');

      const store = this.configService.get<StoreConf>('STORE');

      if (store.CONTACTS) {
        this.logger.verbose('saving contacts to store');
        data.forEach((contact) => {
          this.writeStore({
            path: join(this.storePath, 'contacts', instanceName),
            fileName: contact.id,
            data: contact,
          });
          this.logger.verbose(
            'contacts saved to store in path: ' +
              join(this.storePath, 'contacts', instanceName) +
              '/' +
              contact.id,
          );
        });

        this.logger.verbose('contacts saved to store: ' + data.length + ' contacts');
        return { insertCount: data.length };
      }

      this.logger.verbose('contacts not saved');
      return { insertCount: 0 };
    } catch (error) {
      return error;
    } finally {
      data = undefined;
    }
  }

  public async update(
    data: ContactRaw[],
    instanceName: string,
    saveDb = false,
  ): Promise<IInsert> {
    try {
      this.logger.verbose('updating contacts');

      if (data.length === 0) {
        this.logger.verbose('no contacts to update');
        return;
      }

      if (this.dbSettings.ENABLED && saveDb) {
        this.logger.verbose('updating contacts in db');

        const contacts = data.map((contact) => {
          return {
            updateOne: {
              filter: { id: contact.id },
              update: { ...contact },
              upsert: true,
            },
          };
        });

        const { nModified } = await this.contactModel.bulkWrite(contacts);

        this.logger.verbose('contacts updated in db: ' + nModified + ' contacts');
        return { insertCount: nModified };
      }

      this.logger.verbose('updating contacts in store');

      const store = this.configService.get<StoreConf>('STORE');

      if (store.CONTACTS) {
        this.logger.verbose('updating contacts in store');
        data.forEach((contact) => {
          this.writeStore({
            path: join(this.storePath, 'contacts', instanceName),
            fileName: contact.id,
            data: contact,
          });
          this.logger.verbose(
            'contacts updated in store in path: ' +
              join(this.storePath, 'contacts', instanceName) +
              '/' +
              contact.id,
          );
        });

        this.logger.verbose('contacts updated in store: ' + data.length + ' contacts');

        return { insertCount: data.length };
      }

      this.logger.verbose('contacts not updated');
      return { insertCount: 0 };
    } catch (error) {
      return error;
    } finally {
      data = undefined;
    }
  }

  public async find(query: ContactQuery): Promise<ContactRaw[]> {
    try {
      this.logger.verbose('finding contacts');
      if (this.dbSettings.ENABLED) {
        this.logger.verbose('finding contacts in db');
        return await this.contactModel.find({ ...query.where });
      }

      this.logger.verbose('finding contacts in store');
      const contacts: ContactRaw[] = [];
      if (query?.where?.id) {
        this.logger.verbose('finding contacts in store by id');
        contacts.push(
          JSON.parse(
            readFileSync(
              join(
                this.storePath,
                'contacts',
                query.where.owner,
                query.where.id + '.json',
              ),
              { encoding: 'utf-8' },
            ),
          ),
        );
      } else {
        this.logger.verbose('finding contacts in store by owner');

        const openDir = opendirSync(join(this.storePath, 'contacts', query.where.owner), {
          encoding: 'utf-8',
        });
        for await (const dirent of openDir) {
          if (dirent.isFile()) {
            contacts.push(
              JSON.parse(
                readFileSync(
                  join(this.storePath, 'contacts', query.where.owner, dirent.name),
                  { encoding: 'utf-8' },
                ),
              ),
            );
          }
        }
      }

      this.logger.verbose('contacts found in store: ' + contacts.length + ' contacts');
      return contacts;
    } catch (error) {
      return [];
    }
  }
}