AWSTemplateFormatVersion: "2010-09-09"
Description: S3 -> CodePipeline -> CodeBuild(ARM) -> ECR pipeline for Blog Lambda

Parameters:
  SourceBucketName:
    Type: String
    Default: blog-lambda-source-bucket
    Description: S3 bucket name for source code

  SourceObjectKey:
    Type: String
    Default: blog-lambda-source.zip
    Description: S3 object key for source code archive

Resources:

  SourceBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: !Sub "${AWS::Region}-${AWS::AccountId}-${SourceBucketName}"
      Tags:
        - Key: Project
          Value: Blog-Deployment
      VersioningConfiguration:
        Status: Enabled
      NotificationConfiguration:
        EventBridgeConfiguration:
          EventBridgeEnabled: true

  CodeBuildRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal:
              Service: codebuild.amazonaws.com
            Action: sts:AssumeRole
      Policies:
        - PolicyName: CodeBuildPolicy
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              - Effect: Allow
                Action:
                  - logs:CreateLogGroup
                  - logs:CreateLogStream
                  - logs:PutLogEvents
                Resource: "*"
              - Effect: Allow
                Action:
                  - ecr:GetAuthorizationToken
                Resource: "*"
              - Effect: Allow
                Action:
                  - ecr:BatchCheckLayerAvailability
                  - ecr:InitiateLayerUpload
                  - ecr:UploadLayerPart
                  - ecr:CompleteLayerUpload
                  - ecr:PutImage
                Resource:
                  Fn::ImportValue: BlogDeployment-RepositoryArn
              - Effect: Allow
                Action:
                  - s3:GetObject
                  - s3:PutObject
                  - s3:ListBucket
                Resource:
                  - !Sub "arn:aws:s3:::codebuild-${AWS::Region}-${AWS::AccountId}-input-bucket"
                  - !Sub "arn:aws:s3:::codebuild-${AWS::Region}-${AWS::AccountId}-input-bucket/*"
                  - !GetAtt SourceBucket.Arn
                  - !Sub "${SourceBucket.Arn}/*"

  BlogLambdaBuildProject:
    Type: AWS::CodeBuild::Project
    Properties:
      Name: blog-lambda-build
      ServiceRole: !GetAtt CodeBuildRole.Arn
      Artifacts:
        Type: CODEPIPELINE
      Environment:
        Type: ARM_CONTAINER
        ComputeType: BUILD_GENERAL1_SMALL
        Image: aws/codebuild/amazonlinux2-aarch64-standard:3.0
        PrivilegedMode: true
        EnvironmentVariables:
          - Name: ECR_REPOSITORY_URI
            Value:
              Fn::ImportValue: BlogDeployment-RepositoryUri
          - Name: AWS_DEFAULT_REGION
            Value: !Ref AWS::Region
          - Name: AWS_ACCOUNT_ID
            Value: !Ref AWS::AccountId
      Source:
        Type: CODEPIPELINE
        BuildSpec: ci/buildspec.yml
      TimeoutInMinutes: 30

  CodePipelineRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal:
              Service: codepipeline.amazonaws.com
            Action: sts:AssumeRole
      Policies:
        - PolicyName: CodePipelinePolicy
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
              - Effect: Allow
                Action:
                  - s3:GetBucketAcl
                  - s3:GetObjectTagging
                  - s3:GetObjectVersionTagging
                  - s3:GetObject
                  - s3:GetObjectVersion
                  - s3:PutObject
                  - s3:ListBucket
                  - s3:GetBucketLocation
                  - s3:GetBucketVersioning
                Resource:
                  - !Sub "arn:aws:s3:::codebuild-${AWS::Region}-${AWS::AccountId}-input-bucket"
                  - !Sub "arn:aws:s3:::codebuild-${AWS::Region}-${AWS::AccountId}-input-bucket/*"
                  - !GetAtt SourceBucket.Arn
                  - !Sub "${SourceBucket.Arn}/*"
              - Effect: Allow
                Action:
                  - codebuild:StartBuild
                  - codebuild:BatchGetBuilds
                Resource:
                  - !Sub "arn:aws:codebuild:${AWS::Region}:${AWS::AccountId}:build/*"
                  - !Sub "arn:aws:codebuild:${AWS::Region}:${AWS::AccountId}:project/*"
              - Effect: Allow
                Action:
                  - codepipeline:PutApprovalResult
                  - codepipeline:StartPipelineExecution
                Resource: !Sub "arn:aws:codepipeline:${AWS::Region}:${AWS::AccountId}:*"

  BlogLambdaPipeline:
    Type: AWS::CodePipeline::Pipeline
    Properties:
      Name: blog-lambda-pipeline
      PipelineType: V2
      RoleArn: !GetAtt CodePipelineRole.Arn
      ArtifactStore:
        Type: S3
        Location: !Sub "codebuild-${AWS::Region}-${AWS::AccountId}-input-bucket"
      Stages:
        - Name: Source
          Actions:
            - Name: S3Source
              ActionTypeId:
                Category: Source
                Owner: AWS
                Provider: S3
                Version: "1"
              Configuration:
                S3Bucket: !Ref SourceBucket
                S3ObjectKey: !Ref SourceObjectKey
                PollForSourceChanges: false
              OutputArtifacts:
                - Name: SourceOutput
        - Name: Build
          Actions:
            - Name: BuildAndPushImage
              ActionTypeId:
                Category: Build
                Owner: AWS
                Provider: CodeBuild
                Version: "1"
              InputArtifacts:
                - Name: SourceOutput
              Configuration:
                ProjectName: !Ref BlogLambdaBuildProject

  S3SourceChangeRule:
    Type: AWS::Events::Rule
    Properties:
      Description: Trigger CodePipeline on S3 source update
      EventPattern:
        source:
          - aws.s3
        detail-type:
          - Object Created
        detail:
          bucket:
            name:
              - !Ref SourceBucket
          object:
            key:
              - !Ref SourceObjectKey
      Targets:
        - Arn: !Sub "arn:aws:codepipeline:${AWS::Region}:${AWS::AccountId}:${BlogLambdaPipeline}"
          RoleArn: !GetAtt EventBridgeInvokePipelineRole.Arn
          Id: CodePipelineTarget

  EventBridgeInvokePipelineRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              Service: events.amazonaws.com
            Action: sts:AssumeRole
      Policies:
        - PolicyName: AllowStartPipeline
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
              - Effect: Allow
                Action:
                  - codepipeline:StartPipelineExecution
                Resource: !Sub "arn:aws:codepipeline:${AWS::Region}:${AWS::AccountId}:${BlogLambdaPipeline}"

Outputs:
  SourceBucketName:
    Description: S3 bucket for source code
    Value: !Ref SourceBucket
    Export:
      Name: !Sub "${AWS::StackName}-SourceBucket"

  PipelineName:
    Description: CodePipeline name
    Value: !Ref BlogLambdaPipeline
    Export:
      Name: !Sub "${AWS::StackName}-PipelineName"