terraform {
  required_version = ">= 1.5.0"
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = ">= 5.0"
    }
  }
}

resource "aws_ecr_repository" "this" {
  for_each = toset(var.repository_names)

  name                 = each.key
  image_tag_mutability = "MUTABLE"
  force_delete         = var.force_delete

  image_scanning_configuration {
    scan_on_push = true
  }

  encryption_configuration {
    encryption_type = "AES256"
  }

  tags = var.tags
}

resource "aws_ecr_lifecycle_policy" "keep_last_20" {
  for_each = aws_ecr_repository.this

  repository = each.value.name

  policy = jsonencode({
    rules = [
      {
        rulePriority = 1
        description  = "Keep only the last 20 images"
        selection = {
          tagStatus   = "any"
          countType   = "imageCountMoreThan"
          countNumber = 20
        }
        action = {
          type = "expire"
        }
      }
    ]
  })
}