locals {
    dhcp_config_path_systemd_unit = {
        name = "dhcp_config.path"
        enabled = true
        contents = templatefile(
            "${path.module}/files/dhcp/dhcp_config.path.tftpl", 
            {
                path = "/var/lib/containers/storage/volumes/dhcp_config/_data/writable/"
            }   
        )
    }

    dhcp_config_service_systemd_unit = {
        name = "dhcp_config.service"
        enabled = false
        contents = file("${path.module}/files/dhcp/dhcp_config.service")
    }

    dhcp_data_filesystem = {
        device = "${local.data_device_path}-part3"
        format = "ext4"
        label = "dhcp_data"
    }

    dhcp_data_volume_file = {
        path = "/etc/containers/systemd/dhcp_data.volume"
        user = {id = 0}
        group = {id = 0}
        mode = 420 # 0644
        contents = {
            source = format(
                "data:text/plain;base64,%s", 
                base64encode(file("${path.module}/files/dhcp/dhcp_data.volume"))
            )
        }
    }

    dhcp_builddir_dir = {
        path = "/root/dhcp"
        user = {id = 0}
        group = {id = 0}
        mode = 448 # 0700
    }

    dnsmasq_base_config_file = {
        path = "/root/dhcp/dnsmasq.conf"
        user = {id = 0}
        group = {id = 0}
        mode = 420 # 0644
        contents = {
            source = format(
                "data:text/plain;base64,%s", 
                base64encode(templatefile(
                    "${path.module}/files/dhcp/dnsmasq.conf.tftpl",
                    {
                        dhcp_server_ip_addr = var.dhcp_server_ip_addr
                        dhcp_range = split("/", var.dhcp_range)[0]
                        dhcp_range_netmask = cidrnetmask(var.dhcp_range)
                        dhcp_router = var.dhcp_gateway
                        config_extension_dir = "/etc/dnsmasq.d/writable/"
                    }
                ))
            )
        }   
    }

    generate_dhcp_options_script_file = {
        path = "/var/roothome/generate_dhcp_options.sh"
        user = {id = 0}
        group = {id = 0}
        mode = 448 # 0700
        contents = {
            source = format(
                "data:text/plain;base64,%s",             
                base64encode(file("${path.module}/files/dhcp/generate_dhcp_options.sh"))
            )
        }
    }

    dhcp_containerfile_file = {
        path = "/root/dhcp/Containerfile"
        user = {id = 0}
        group = {id = 0}
        mode = 420 # 0644
        contents = {
            source = format(
                "data:text/plain;base64,%s",   
                base64encode(file("${path.module}/files/dhcp/dnsmasq.Containerfile"))
            )
        }
    }

    dhcp_container_file = {
        path = "/etc/containers/systemd/dnsmasq_container.container"
        user = {id = 0}
        group = {id = 0}
        mode = 420 # 0644
        contents = {
            source = format(
                "data:text/plain;base64,%s",  
                base64encode(file("${path.module}/files/dhcp/dnsmasq_container.container"))
            )
        }        
    }

    dhcp_filesystems = [
        local.dhcp_data_filesystem,
    ]

    dhcp_directories = [
        local.dhcp_builddir_dir,
    ]

    dhcp_files = [
        local.dhcp_data_volume_file,
        local.dnsmasq_base_config_file,
        local.generate_dhcp_options_script_file,
        local.dhcp_containerfile_file,
        local.dhcp_container_file,
    ]

    dhcp_systemd_units = [
        local.dhcp_config_path_systemd_unit,
        local.dhcp_config_service_systemd_unit,
    ]
}