# -----------------------------------------------------------------------------------------------------------
# IAM Role for Redirect Lambda

data "aws_iam_policy_document" "lambda_redirect" {
  statement {
    actions = ["sts:AssumeRole"]

    principals {
      type        = "Service"
      identifiers = [
        "edgelambda.amazonaws.com",
        "lambda.amazonaws.com"
      ]
    }
  }
}

resource "aws_iam_role" "lambda_redirect" {
  name = "${var.site}-lambda-redirect-role"
  assume_role_policy = data.aws_iam_policy_document.lambda_redirect.json

  tags = {
    Site = var.site
  }
}


# -----------------------------------------------------------------------------------------------------------
# IAM Role for Log Parsing Lambda

data "aws_iam_policy_document" "s3_bucket_access" {
  statement {
    actions = [
      "s3:*",
    ]

    resources = [
      aws_s3_bucket.ipixel_logs.arn,
      "${aws_s3_bucket.ipixel_logs.arn}/*",
    ]
  }
}

data "aws_iam_policy_document" "lambda_assume_role" {
  statement {
    actions = ["sts:AssumeRole"]

    principals {
      type        = "Service"
      identifiers = [
        "edgelambda.amazonaws.com",
        "lambda.amazonaws.com"
      ]
    }
  }
}

resource "aws_iam_role" "ipixel_parser" {
  name = "lambda-${var.site}-ipixel"

  assume_role_policy = data.aws_iam_policy_document.lambda_assume_role.json

  tags = {
    Site = var.site,
    Role = "ipixel"
  }
}

resource "aws_iam_role_policy_attachment" "ipixel_parser" {
  role       = aws_iam_role.ipixel_parser.name
  policy_arn = "arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
}


resource "aws_iam_role_policy" "ipixel_parser_cloudwatch_log_group" {
  name   = "cloudwatch-log-group"
  role   = aws_iam_role.ipixel_parser.name
  policy = data.aws_iam_policy_document.ipixel_parser_cloudwatch_log_group.json
}

resource "aws_iam_role_policy" "lambda_s3_bucket_readonly" {
  name   = "s3-bucket-readonly"
  role   = aws_iam_role.ipixel_parser.name
  policy = data.aws_iam_policy_document.s3_bucket_access.json
}