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

import { isDefined } from 'twenty-shared/utils';
import { IsNull, Repository } from 'typeorm';

import { ApplicationEntity } from 'src/engine/core-modules/application/application.entity';
import { ApplicationService } from 'src/engine/core-modules/application/application.service';
import { WorkspaceManyOrAllFlatEntityMapsCacheService } from 'src/engine/metadata-modules/flat-entity/services/workspace-many-or-all-flat-entity-maps-cache.service';
import { findFlatEntityByIdInFlatEntityMapsOrThrow } from 'src/engine/metadata-modules/flat-entity/utils/find-flat-entity-by-id-in-flat-entity-maps-or-throw.util';
import { fromCreateWebhookInputToFlatWebhookToCreate } from 'src/engine/metadata-modules/flat-webhook/utils/from-create-webhook-input-to-flat-webhook-to-create.util';
import { fromDeleteWebhookInputToFlatWebhookOrThrow } from 'src/engine/metadata-modules/flat-webhook/utils/from-delete-webhook-input-to-flat-webhook-or-throw.util';
import { fromFlatWebhookToWebhookDto } from 'src/engine/metadata-modules/flat-webhook/utils/from-flat-webhook-to-webhook-dto.util';
import { fromUpdateWebhookInputToFlatWebhookToUpdateOrThrow } from 'src/engine/metadata-modules/flat-webhook/utils/from-update-webhook-input-to-flat-webhook-to-update-or-throw.util';
import { fromWebhookEntityToFlatWebhook } from 'src/engine/metadata-modules/flat-webhook/utils/from-webhook-entity-to-flat-webhook.util';
import { InjectWorkspaceScopedRepository } from 'src/engine/twenty-orm/workspace-scoped-repository/inject-workspace-scoped-repository.decorator';
import { WorkspaceScopedRepository } from 'src/engine/twenty-orm/workspace-scoped-repository/workspace-scoped-repository';
import { type CreateWebhookInput } from 'src/engine/metadata-modules/webhook/dtos/create-webhook.input';
import { type UpdateWebhookInput } from 'src/engine/metadata-modules/webhook/dtos/update-webhook.input';
import { type WebhookDTO } from 'src/engine/metadata-modules/webhook/dtos/webhook.dto';
import { WebhookEntity } from 'src/engine/metadata-modules/webhook/entities/webhook.entity';
import { createIdToUniversalIdentifierMap } from 'src/engine/workspace-cache/utils/create-id-to-universal-identifier-map.util';
import { WorkspaceMigrationBuilderException } from 'src/engine/workspace-manager/workspace-migration/exceptions/workspace-migration-builder-exception';
import { WorkspaceMigrationValidateBuildAndRunService } from 'src/engine/workspace-manager/workspace-migration/services/workspace-migration-validate-build-and-run-service';

@Injectable()
export class WebhookService {
  constructor(
    @InjectWorkspaceScopedRepository(WebhookEntity)
    private readonly webhookRepository: WorkspaceScopedRepository<WebhookEntity>,
    @InjectRepository(ApplicationEntity)
    private readonly applicationRepository: Repository<ApplicationEntity>,
    private readonly workspaceMigrationValidateBuildAndRunService: WorkspaceMigrationValidateBuildAndRunService,
    private readonly workspaceManyOrAllFlatEntityMapsCacheService: WorkspaceManyOrAllFlatEntityMapsCacheService,
    private readonly applicationService: ApplicationService,
  ) {}

  private normalizeTargetUrl(targetUrl: string): string {
    try {
      const url = new URL(targetUrl);

      return url.toString();
    } catch {
      return targetUrl;
    }
  }

  async findAll(workspaceId: string): Promise<WebhookDTO[]> {
    const [webhooks, applications] = await Promise.all([
      this.webhookRepository.find(workspaceId, {
        where: { deletedAt: IsNull() },
        order: { createdAt: 'ASC' },
      }),
      this.applicationRepository.find({
        where: { workspaceId },
        select: ['id', 'universalIdentifier'],
      }),
    ]);

    const applicationIdToUniversalIdentifierMap =
      createIdToUniversalIdentifierMap(applications);

    return webhooks
      .map((webhookEntity) =>
        fromWebhookEntityToFlatWebhook({
          entity: webhookEntity,
          applicationIdToUniversalIdentifierMap,
        }),
      )
      .map(fromFlatWebhookToWebhookDto);
  }

  async findById(id: string, workspaceId: string): Promise<WebhookDTO | null> {
    const [webhook, applications] = await Promise.all([
      this.webhookRepository.findOne(workspaceId, {
        where: { id, deletedAt: IsNull() },
      }),
      this.applicationRepository.find({
        where: { workspaceId },
        select: ['id', 'universalIdentifier'],
      }),
    ]);

    if (!isDefined(webhook)) {
      return null;
    }

    const applicationIdToUniversalIdentifierMap =
      createIdToUniversalIdentifierMap(applications);

    return fromFlatWebhookToWebhookDto(
      fromWebhookEntityToFlatWebhook({
        entity: webhook,
        applicationIdToUniversalIdentifierMap,
      }),
    );
  }

  async create(
    input: CreateWebhookInput,
    workspaceId: string,
  ): Promise<WebhookDTO> {
    const normalizedTargetUrl = this.normalizeTargetUrl(input.targetUrl);

    const { workspaceCustomFlatApplication } =
      await this.applicationService.findWorkspaceTwentyStandardAndCustomApplicationOrThrow(
        { workspaceId },
      );

    const flatWebhookToCreate = fromCreateWebhookInputToFlatWebhookToCreate({
      createWebhookInput: {
        ...input,
        targetUrl: normalizedTargetUrl,
      },
      workspaceId,
      flatApplication: workspaceCustomFlatApplication,
    });

    const validateAndBuildResult =
      await this.workspaceMigrationValidateBuildAndRunService.validateBuildAndRunWorkspaceMigration(
        {
          allFlatEntityOperationByMetadataName: {
            webhook: {
              flatEntityToCreate: [flatWebhookToCreate],
              flatEntityToDelete: [],
              flatEntityToUpdate: [],
            },
          },
          workspaceId,
          applicationUniversalIdentifier:
            workspaceCustomFlatApplication.universalIdentifier,
        },
      );

    if (validateAndBuildResult.status === 'fail') {
      throw new WorkspaceMigrationBuilderException(
        validateAndBuildResult,
        'Multiple validation errors occurred while creating webhook',
      );
    }

    const { flatWebhookMaps: recomputedFlatWebhookMaps } =
      await this.workspaceManyOrAllFlatEntityMapsCacheService.getOrRecomputeManyOrAllFlatEntityMaps(
        {
          workspaceId,
          flatMapsKeys: ['flatWebhookMaps'],
        },
      );

    return fromFlatWebhookToWebhookDto(
      findFlatEntityByIdInFlatEntityMapsOrThrow({
        flatEntityId: flatWebhookToCreate.id,
        flatEntityMaps: recomputedFlatWebhookMaps,
      }),
    );
  }

  async update(
    input: UpdateWebhookInput,
    workspaceId: string,
  ): Promise<WebhookDTO> {
    const { workspaceCustomFlatApplication } =
      await this.applicationService.findWorkspaceTwentyStandardAndCustomApplicationOrThrow(
        { workspaceId },
      );

    const normalizedInput = {
      ...input,
      update: {
        ...input.update,
        ...(isDefined(input.update.targetUrl) && {
          targetUrl: this.normalizeTargetUrl(input.update.targetUrl),
        }),
      },
    };

    const { flatWebhookMaps: existingFlatWebhookMaps } =
      await this.workspaceManyOrAllFlatEntityMapsCacheService.getOrRecomputeManyOrAllFlatEntityMaps(
        {
          workspaceId,
          flatMapsKeys: ['flatWebhookMaps'],
        },
      );

    const flatWebhookToUpdate =
      fromUpdateWebhookInputToFlatWebhookToUpdateOrThrow({
        flatWebhookMaps: existingFlatWebhookMaps,
        updateWebhookInput: normalizedInput,
      });

    const validateAndBuildResult =
      await this.workspaceMigrationValidateBuildAndRunService.validateBuildAndRunWorkspaceMigration(
        {
          allFlatEntityOperationByMetadataName: {
            webhook: {
              flatEntityToCreate: [],
              flatEntityToDelete: [],
              flatEntityToUpdate: [flatWebhookToUpdate],
            },
          },
          workspaceId,
          applicationUniversalIdentifier:
            workspaceCustomFlatApplication.universalIdentifier,
        },
      );

    if (validateAndBuildResult.status === 'fail') {
      throw new WorkspaceMigrationBuilderException(
        validateAndBuildResult,
        'Multiple validation errors occurred while updating webhook',
      );
    }

    const { flatWebhookMaps: recomputedFlatWebhookMaps } =
      await this.workspaceManyOrAllFlatEntityMapsCacheService.getOrRecomputeManyOrAllFlatEntityMaps(
        {
          workspaceId,
          flatMapsKeys: ['flatWebhookMaps'],
        },
      );

    return fromFlatWebhookToWebhookDto(
      findFlatEntityByIdInFlatEntityMapsOrThrow({
        flatEntityId: input.id,
        flatEntityMaps: recomputedFlatWebhookMaps,
      }),
    );
  }

  async delete(id: string, workspaceId: string): Promise<WebhookDTO> {
    const { workspaceCustomFlatApplication } =
      await this.applicationService.findWorkspaceTwentyStandardAndCustomApplicationOrThrow(
        { workspaceId },
      );

    const { flatWebhookMaps: existingFlatWebhookMaps } =
      await this.workspaceManyOrAllFlatEntityMapsCacheService.getOrRecomputeManyOrAllFlatEntityMaps(
        {
          workspaceId,
          flatMapsKeys: ['flatWebhookMaps'],
        },
      );

    const flatWebhookToDelete = fromDeleteWebhookInputToFlatWebhookOrThrow({
      flatWebhookMaps: existingFlatWebhookMaps,
      webhookId: id,
    });

    const validateAndBuildResult =
      await this.workspaceMigrationValidateBuildAndRunService.validateBuildAndRunWorkspaceMigration(
        {
          allFlatEntityOperationByMetadataName: {
            webhook: {
              flatEntityToCreate: [],
              flatEntityToDelete: [flatWebhookToDelete],
              flatEntityToUpdate: [],
            },
          },
          workspaceId,
          applicationUniversalIdentifier:
            workspaceCustomFlatApplication.universalIdentifier,
        },
      );

    if (validateAndBuildResult.status === 'fail') {
      throw new WorkspaceMigrationBuilderException(
        validateAndBuildResult,
        'Multiple validation errors occurred while deleting webhook',
      );
    }

    return fromFlatWebhookToWebhookDto(flatWebhookToDelete);
  }
}