'use strict';

const BbPromise = require('bluebird');
const resolveCfImportValue = require('../utils/resolveCfImportValue');

module.exports = {
  getStackInfo() {
    // NOTE: this is the global gatheredData object which will be passed around
    this.gatheredData = {
      info: {
        functions: [],
        layers: [],
        endpoints: [],
        service: this.serverless.service.service,
        stage: this.provider.getStage(),
        region: this.provider.getRegion(),
        stack: this.provider.naming.getStackName(),
      },
      outputs: [],
    };

    const stackName = this.provider.naming.getStackName();

    const stackData = {};
    const sdkRequests = [
      this.provider
        .request('CloudFormation', 'describeStacks', { StackName: stackName })
        .then(result => {
          if (result) stackData.outputs = result.Stacks[0].Outputs;
        }),
    ];
    const httpApiId =
      this.serverless.service.provider.httpApi && this.serverless.service.provider.httpApi.id;
    if (httpApiId) {
      sdkRequests.push(
        (httpApiId['Fn::ImportValue']
          ? resolveCfImportValue(this.provider, httpApiId['Fn::ImportValue'])
          : BbPromise.resolve(httpApiId)
        )
          .then(id => {
            return this.provider.request('ApiGatewayV2', 'getApi', { ApiId: id });
          })
          .then(
            result => {
              stackData.externalHttpApiEndpoint = result.ApiEndpoint;
            },
            error => {
              throw new this.serverless.classes.Error(
                `Could not resolve provider.httpApi.id parameter. ${error.message}`
              );
            }
          )
      );
    }

    // Get info from CloudFormation Outputs
    return BbPromise.all(sdkRequests).then(() => {
      let outputs;

      if (stackData.outputs) {
        ({ outputs } = stackData);

        const serviceEndpointOutputRegex = this.provider.naming.getServiceEndpointRegex();

        // Outputs
        this.gatheredData.outputs = outputs;

        // Functions
        this.serverless.service.getAllFunctions().forEach(func => {
          const functionInfo = {};
          functionInfo.name = func;
          functionInfo.deployedName = this.serverless.service.getFunction(func).name;
          this.gatheredData.info.functions.push(functionInfo);
        });

        // Layers
        this.serverless.service.getAllLayers().forEach(layer => {
          const layerInfo = {};
          layerInfo.name = layer;
          const layerOutputId = this.provider.naming.getLambdaLayerOutputLogicalId(layer);
          for (const output of outputs) {
            if (output.OutputKey === layerOutputId) {
              layerInfo.arn = output.OutputValue;
              break;
            }
          }
          this.gatheredData.info.layers.push(layerInfo);
        });

        // CloudFront
        const cloudFrontDomainName = outputs.find(
          output =>
            output.OutputKey === this.provider.naming.getCloudFrontDistributionDomainNameLogicalId()
        );
        if (cloudFrontDomainName) {
          this.gatheredData.info.cloudFront = cloudFrontDomainName.OutputValue;
        }

        // Endpoints
        outputs
          .filter(x => x.OutputKey.match(serviceEndpointOutputRegex))
          .forEach(x => {
            if (x.OutputKey === 'HttpApiUrl') {
              this.gatheredData.info.endpoints.push(`httpApi: ${x.OutputValue}`);
            } else {
              this.gatheredData.info.endpoints.push(x.OutputValue);
            }
            if (
              this.serverless.service.deployment &&
              this.serverless.service.deployment.deploymentId
            ) {
              this.serverless.service.deployment.apiId = x.OutputValue.split('//')[1].split('.')[0];
            }
          });
      }
      if (stackData.externalHttpApiEndpoint) {
        this.gatheredData.info.endpoints.push(`httpApi: ${stackData.externalHttpApiEndpoint}`);
      }

      return BbPromise.resolve();
    });
  },
};