import { Injectable, Logger } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';

import { Repository } from 'typeorm';

import { FeatureFlagService } from 'src/engine/core-modules/feature-flag/services/feature-flag.service';
import { UserWorkspace } from 'src/engine/core-modules/user-workspace/user-workspace.entity';
import { Workspace } from 'src/engine/core-modules/workspace/workspace.entity';
import { DataSourceEntity } from 'src/engine/metadata-modules/data-source/data-source.entity';
import { DataSourceService } from 'src/engine/metadata-modules/data-source/data-source.service';
import { FieldMetadataEntity } from 'src/engine/metadata-modules/field-metadata/field-metadata.entity';
import { ObjectMetadataService } from 'src/engine/metadata-modules/object-metadata/object-metadata.service';
import { RoleEntity } from 'src/engine/metadata-modules/role/role.entity';
import { RoleService } from 'src/engine/metadata-modules/role/role.service';
import { UserWorkspaceRoleEntity } from 'src/engine/metadata-modules/role/user-workspace-role.entity';
import { UserRoleService } from 'src/engine/metadata-modules/user-role/user-role.service';
import { WorkspaceMigrationService } from 'src/engine/metadata-modules/workspace-migration/workspace-migration.service';
import { WorkspaceDataSourceService } from 'src/engine/workspace-datasource/workspace-datasource.service';
import { standardObjectsPrefillData } from 'src/engine/workspace-manager/standard-objects-prefill-data/standard-objects-prefill-data';
import { WorkspaceSyncMetadataService } from 'src/engine/workspace-manager/workspace-sync-metadata/workspace-sync-metadata.service';

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

  constructor(
    private readonly workspaceDataSourceService: WorkspaceDataSourceService,
    private readonly workspaceMigrationService: WorkspaceMigrationService,
    private readonly objectMetadataService: ObjectMetadataService,
    private readonly dataSourceService: DataSourceService,
    private readonly workspaceSyncMetadataService: WorkspaceSyncMetadataService,
    @InjectRepository(FieldMetadataEntity, 'core')
    private readonly fieldMetadataRepository: Repository<FieldMetadataEntity>,
    @InjectRepository(UserWorkspace, 'core')
    private readonly userWorkspaceRepository: Repository<UserWorkspace>,
    private readonly roleService: RoleService,
    private readonly userRoleService: UserRoleService,
    private readonly featureFlagService: FeatureFlagService,
    @InjectRepository(Workspace, 'core')
    private readonly workspaceRepository: Repository<Workspace>,
    @InjectRepository(UserWorkspaceRoleEntity, 'core')
    private readonly userWorkspaceRoleRepository: Repository<UserWorkspaceRoleEntity>,
    @InjectRepository(RoleEntity, 'core')
    private readonly roleRepository: Repository<RoleEntity>,
  ) {}

  public async init({
    workspaceId,
    userId,
  }: {
    workspaceId: string;
    userId: string;
  }): Promise<void> {
    const schemaCreationStart = performance.now();
    const schemaName =
      await this.workspaceDataSourceService.createWorkspaceDBSchema(
        workspaceId,
      );

    const schemaCreationEnd = performance.now();

    this.logger.log(
      `Schema creation took ${schemaCreationEnd - schemaCreationStart}ms`,
    );

    const dataSourceMetadataCreationStart = performance.now();
    const dataSourceMetadata =
      await this.dataSourceService.createDataSourceMetadata(
        workspaceId,
        schemaName,
      );

    const featureFlags =
      await this.featureFlagService.getWorkspaceFeatureFlagsMap(workspaceId);

    await this.workspaceSyncMetadataService.synchronize({
      workspaceId,
      dataSourceId: dataSourceMetadata.id,
      featureFlags,
    });

    const dataSourceMetadataCreationEnd = performance.now();

    this.logger.log(
      `Metadata creation took ${dataSourceMetadataCreationEnd - dataSourceMetadataCreationStart}ms`,
    );

    const permissionsEnabledStart = performance.now();

    await this.initPermissions({ workspaceId, userId });

    const permissionsEnabledEnd = performance.now();

    this.logger.log(
      `Permissions enabled took ${permissionsEnabledEnd - permissionsEnabledStart}ms`,
    );

    const prefillStandardObjectsStart = performance.now();

    await this.prefillWorkspaceWithStandardObjectsRecords(
      dataSourceMetadata,
      workspaceId,
    );

    const prefillStandardObjectsEnd = performance.now();

    this.logger.log(
      `Prefill standard objects took ${prefillStandardObjectsEnd - prefillStandardObjectsStart}ms`,
    );
  }

  private async prefillWorkspaceWithStandardObjectsRecords(
    dataSourceMetadata: DataSourceEntity,
    workspaceId: string,
  ) {
    const mainDataSource =
      await this.workspaceDataSourceService.connectToMainDataSource();

    if (!mainDataSource) {
      throw new Error('Could not connect to main data source');
    }

    const createdObjectMetadata =
      await this.objectMetadataService.findManyWithinWorkspace(workspaceId);

    await standardObjectsPrefillData(
      mainDataSource,
      dataSourceMetadata.schema,
      createdObjectMetadata,
    );
  }

  public async delete(workspaceId: string): Promise<void> {
    //TODO: delete all logs when #611 closed
    this.logger.log(`Deleting workspace ${workspaceId} ...`);

    await this.fieldMetadataRepository.delete({
      workspaceId,
    });
    this.logger.log(`workspace ${workspaceId} field metadata deleted`);

    await this.userWorkspaceRoleRepository.delete({
      workspaceId,
    });
    this.logger.log(`workspace ${workspaceId} user workspace role deleted`);

    await this.roleRepository.delete({
      workspaceId,
    });
    this.logger.log(`workspace ${workspaceId} role deleted`);

    await this.objectMetadataService.deleteObjectsMetadata(workspaceId);
    this.logger.log(`workspace ${workspaceId} object metadata deleted`);

    await this.workspaceMigrationService.deleteAllWithinWorkspace(workspaceId);
    this.logger.log(`workspace ${workspaceId} migration deleted`);

    await this.dataSourceService.delete(workspaceId);
    this.logger.log(`workspace ${workspaceId} data source deleted`);
    // Delete schema
    await this.workspaceDataSourceService.deleteWorkspaceDBSchema(workspaceId);
    this.logger.log(`workspace ${workspaceId} schema deleted`);
  }

  private async initPermissions({
    workspaceId,
    userId,
  }: {
    workspaceId: string;
    userId: string;
  }) {
    const adminRole = await this.roleService.createAdminRole({
      workspaceId,
    });

    const userWorkspace = await this.userWorkspaceRepository.findOneOrFail({
      where: {
        workspaceId,
        userId,
      },
    });

    await this.userRoleService.assignRoleToUserWorkspace({
      workspaceId,
      userWorkspaceId: userWorkspace.id,
      roleId: adminRole.id,
    });

    const memberRole = await this.roleService.createMemberRole({
      workspaceId,
    });

    await this.workspaceRepository.update(workspaceId, {
      defaultRoleId: memberRole.id,
    });
  }
}