---
AWSTemplateFormatVersion: 2010-09-09


Parameters:
  Name:
    Type: String

  ParentDomain:
    Type: String

  FullyQualifiedDomainName:
    Type: String

  CodeCommitRepoName:
    Type: String

  SecretsManagerSigningARN:
    Type: String

  SecretsManagerBackchannelARN:
    Type: String

  SecretsManagerEncryptionARN:
    Type: String

  SecretsManagerLDAPSettingsARN:
    Type: String

  SecretsManagerSealerKeyARN:
    Type: String

  RepoSourceBucket:
    Type: String
    Default: aws-shibboleth-reference-architecture
    Description: >
      The S3 bucket from which to fetch the templates used by this stack.

  RepoSourceFolder:
    Type: String
    Default: ''

  Cluster:
    Type: String

  Service:
    Type: String


Resources:
  CodeCommitRepo:
    Type: AWS::CodeCommit::Repository
    Properties: 
      RepositoryDescription: Main code repository for holding the Docker build files for the Shibboleth reference architecture
      RepositoryName: !Ref CodeCommitRepoName
      Code:
        BranchName: main
        S3: 
          Bucket: !Ref RepoSourceBucket
          Key: !Sub '${RepoSourceFolder}repo/code.zip'

  ECRRepo:
    Type: AWS::ECR::Repository
    Properties:
      RepositoryName: !Ref CodeCommitRepoName

  CodeBuildServiceRole:
    Type: AWS::IAM::Role
    Properties:
      Path: /
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service: codebuild.amazonaws.com
            Action: sts:AssumeRole

  CodeBuildServiceRolePolicy:
    Type: AWS::IAM::Policy
    Properties:
      PolicyName: !Sub ${Name}-CodeBuildServiceRolePolicy
      PolicyDocument:
        Version: 2012-10-17
        Statement:
          - Resource: !GetAtt CodeBuildServiceRole.Arn
            Effect: Allow
            Action:
              - sts:AssumeRole
          - Resource: "*"
            Effect: Allow
            Action:
              - logs:CreateLogGroup
              - logs:CreateLogStream
              - logs:PutLogEvents
              - ecr:GetAuthorizationToken
          - Resource: !Sub arn:aws:s3:::${ArtifactBucket}/*
            Effect: Allow
            Action:
              - s3:GetObject
              - s3:PutObject
              - s3:GetObjectVersion
          - Resource: !Sub arn:aws:ecr:${AWS::Region}:${AWS::AccountId}:repository/${ECRRepo}
            Effect: Allow
            Action:
              - ecr:GetDownloadUrlForLayer
              - ecr:BatchGetImage
              - ecr:BatchCheckLayerAvailability
              - ecr:PutImage
              - ecr:InitiateLayerUpload
              - ecr:UploadLayerPart
              - ecr:CompleteLayerUpload
          - Resource:
              - !Ref SecretsManagerSigningARN
              - !Ref SecretsManagerBackchannelARN
              - !Ref SecretsManagerEncryptionARN
              - !Ref SecretsManagerLDAPSettingsARN
            Effect: Allow
            Action:
              - secretsmanager:GetResourcePolicy 
              - secretsmanager:GetSecretValue
              - secretsmanager:PutSecretValue
              - secretsmanager:DescribeSecret
              - secretsmanager:ListSecretVersionIds
      Roles:
        - !Ref CodeBuildServiceRole

  CodePipelineServiceRole:
    Type: AWS::IAM::Role
    Properties:
      Path: /
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service: codepipeline.amazonaws.com
            Action: sts:AssumeRole
      Policies:
        - PolicyName: root
          PolicyDocument:
            Version: 2012-10-17
            Statement:
              - Resource:
                  - !Sub arn:aws:s3:::${ArtifactBucket}/*
                Effect: Allow
                Action:
                  - s3:PutObject
                  - s3:GetObject
                  - s3:GetObjectVersion
                  - s3:GetBucketVersioning
              - Resource: !GetAtt CodeCommitRepo.Arn
                Effect: Allow
                Action:
                  - codecommit:GetCommit
                  - codecommit:GetUploadArchiveStatus
                  - codecommit:GetBranch
                  - codecommit:UploadArchive
              - Resource: "*"
                Effect: Allow
                Action:
                  - ecs:DescribeServices
                  - ecs:DescribeTaskDefinition
                  - ecs:DescribeTasks
                  - ecs:ListTasks
                  - ecs:RegisterTaskDefinition
                  - ecs:UpdateService
                  - codebuild:StartBuild
                  - codebuild:BatchGetBuilds
                  - iam:PassRole

  AmazonCloudWatchEventRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          -
            Effect: Allow
            Principal:
              Service:
                - events.amazonaws.com
            Action: sts:AssumeRole
      Path: /
      Policies:
        -
          PolicyName: cwe-pipeline-execution
          PolicyDocument:
            Version: 2012-10-17
            Statement:
              -
                Effect: Allow
                Action: codepipeline:StartPipelineExecution
                Resource: !Join [ '', [ 'arn:aws:codepipeline:', !Ref 'AWS::Region', ':', !Ref 'AWS::AccountId', ':', !Ref Pipeline ] ] 

  AmazonCloudWatchEventRule:
    Type: AWS::Events::Rule
    Properties:
      EventPattern:
        source:
          - aws.codecommit
        detail-type:
          - 'CodeCommit Repository State Change'
        resources:
          - !Join [ '', [ 'arn:aws:codecommit:', !Ref 'AWS::Region', ':', !Ref 'AWS::AccountId', ':', !Ref CodeCommitRepoName ] ]
        detail:
          event:
            - referenceCreated
            - referenceUpdated
          referenceType:
            - branch
          referenceName:
            - main
      Targets:
        -
          Arn: 
            !Join [ '', [ 'arn:aws:codepipeline:', !Ref 'AWS::Region', ':', !Ref 'AWS::AccountId', ':', !Ref Pipeline ] ]
          RoleArn: !GetAtt AmazonCloudWatchEventRole.Arn
          Id: codepipeline-AppPipeline

  ArtifactBucket:
    Type: AWS::S3::Bucket

  CodeBuildProject:
    Type: AWS::CodeBuild::Project
    Properties:
      Artifacts:
        Type: CODEPIPELINE
      Source:
        Type: CODEPIPELINE
        BuildSpec: |
          version: 0.2
          phases:
            install:
              runtime-versions:
                nodejs: 12
              commands:
                - TEMP_ROLE=`aws sts assume-role --role-arn $CODE_BUILD_SERVICE_ROLE_ARN --role-session-name test`
                - export TEMP_ROLE
                - echo $TEMP_ROLE
                - export AWS_ACCESS_KEY_ID=$(echo "${TEMP_ROLE}" | jq -r '.Credentials.AccessKeyId')
                - export AWS_SECRET_ACCESS_KEY=$(echo "${TEMP_ROLE}" | jq -r '.Credentials.SecretAccessKey')
                - export AWS_SESSION_TOKEN=$(echo "${TEMP_ROLE}" | jq -r '.Credentials.SessionToken')
                - echo $AWS_ACCESS_KEY_ID
                - echo $AWS_SECRET_ACCESS_KEY
                - echo $AWS_SESSION_TOKEN
                - echo $PARENT_DOMAIN
                - echo $FULLY_QUALIFIED_DOMAIN_NAME
            pre_build:
              commands:
                - $(aws ecr get-login --no-include-email)
                - TAG="$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION | head -c 8)"
                - IMAGE_URI="${REPOSITORY_URI}:${TAG}"
            build:
              commands:
                - docker build --build-arg AWS_DEFAULT_REGION=$AWS_DEFAULT_REGION --build-arg AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID --build-arg AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY --build-arg AWS_SESSION_TOKEN=$AWS_SESSION_TOKEN --build-arg PARENT_DOMAIN=$PARENT_DOMAIN --build-arg FULLY_QUALIFIED_DOMAIN_NAME=$FULLY_QUALIFIED_DOMAIN_NAME --build-arg SECRETS_MANAGER_SIGNING_ARN=$SECRETS_MANAGER_SIGNING_ARN --build-arg SECRETS_MANAGER_BACKCHANNEL_ARN=$SECRETS_MANAGER_BACKCHANNEL_ARN --build-arg SECRETS_MANAGER_ENCRYPTION_ARN=$SECRETS_MANAGER_ENCRYPTION_ARN --build-arg SECRETS_MANAGER_LDAP_SETTINGS_ARN=$SECRETS_MANAGER_LDAP_SETTINGS_ARN --build-arg SECRETS_MANAGER_SEALER_KEY_ARN=$SECRETS_MANAGER_SEALER_KEY_ARN --tag "$IMAGE_URI" ./
            post_build:
              commands:
                - docker push "$IMAGE_URI"
                - printf '[{"name":"shibboleth-idp","imageUri":"%s"}]' "$IMAGE_URI" > images.json
          artifacts:
            files: images.json
      Environment:
        ComputeType: BUILD_GENERAL1_SMALL
        Image: aws/codebuild/amazonlinux2-x86_64-standard:3.0
        Type: LINUX_CONTAINER
        PrivilegedMode: true
        EnvironmentVariables:
          - Name: AWS_DEFAULT_REGION
            Value: !Ref AWS::Region
          - Name: CODE_BUILD_SERVICE_ROLE_ARN
            Value: !GetAtt CodeBuildServiceRole.Arn
          - Name: PARENT_DOMAIN
            Value: !Ref ParentDomain
          - Name: FULLY_QUALIFIED_DOMAIN_NAME
            Value: !Ref FullyQualifiedDomainName
          - Name: REPOSITORY_URI
            Value: !Sub ${AWS::AccountId}.dkr.ecr.${AWS::Region}.amazonaws.com/${ECRRepo}
          - Name: SECRETS_MANAGER_SIGNING_ARN
            Value: !Ref SecretsManagerSigningARN
          - Name: SECRETS_MANAGER_BACKCHANNEL_ARN
            Value: !Ref SecretsManagerBackchannelARN
          - Name: SECRETS_MANAGER_ENCRYPTION_ARN
            Value: !Ref SecretsManagerEncryptionARN
          - Name: SECRETS_MANAGER_LDAP_SETTINGS_ARN
            Value: !Ref SecretsManagerLDAPSettingsARN
          - Name: SECRETS_MANAGER_SEALER_KEY_ARN
            Value: !Ref SecretsManagerSealerKeyARN
      Name: !Ref Name
      ServiceRole: !Ref CodeBuildServiceRole

  Pipeline:
    Type: AWS::CodePipeline::Pipeline
    Properties:
      RoleArn: !GetAtt CodePipelineServiceRole.Arn
      ArtifactStore:
        Type: S3
        Location: !Ref ArtifactBucket
      Stages:
        - Name: Source
          Actions:
            - Name: ShibbolethIdP
              ActionTypeId:
                Category: Source
                Owner: AWS
                Provider: CodeCommit
                Version: 1
              Configuration:
                BranchName: main
                PollForSourceChanges: false
                RepositoryName: !Ref 'CodeCommitRepoName'
              InputArtifacts: []
              Name: ApplicationSource
              OutputArtifacts:
                - Name: ShibbolethIdPSource
              RunOrder: 1
        - Name: Build
          Actions:
            - Name: Build
              ActionTypeId:
                Category: Build
                Owner: AWS
                Version: 1
                Provider: CodeBuild
              Configuration:
                ProjectName: !Ref CodeBuildProject
              InputArtifacts:
                - Name: ShibbolethIdPSource
              OutputArtifacts:
                - Name: ShibbolethIdPBuild
              RunOrder: 1
        - Name: Deploy
          Actions:
            - Name: Deploy
              ActionTypeId:
                Category: Deploy
                Owner: AWS
                Version: 1
                Provider: ECS
              Configuration:
                ClusterName: !Ref Cluster
                ServiceName: !Ref Service
                FileName: images.json
              InputArtifacts:
                - Name: ShibbolethIdPBuild
              RunOrder: 1


Outputs:
  PipelineUrl:
    Value: !Sub https://console.aws.amazon.com/codepipeline/home?region=${AWS::Region}#/view/${Pipeline}