# Instance System
# ========================


# Variables
variable "os_name" {
  description = "The name of the operating system to create"
  type        = string
  default     = "ubuntu"
}

variable "os_version" {
  description = "The version of the operationg system to use"
  type        = string
  default     = "latest"
}

# ========

variable "cloud_init" {
  type = string
  default = ""
  description = "Override system cloud_init"
}
variable "cloud_init_vars" {
  type = map
  default = {}
  description = "Override cloud init vars"
}
# ==========

variable "domain" {
  type = string
  default = "nodomain"
}

variable "hostname" {
  type = string
  default = "noname"
}

variable "user" {
  type = string
  default = "cloud"
}

variable "password_hash" {
  type = string
  default = ""
}

variable "authorized_key" {
  type = string
  default = ""
}



locals {
  # Operating System
  # ========================
  distro = {
    "debian" = {
      "latest"  = {
        "cloud_init" = "debian",
        "url" = "https://cdimage.debian.org/cdimage/cloud/buster/20210208-542/debian-10-genericcloud-amd64-20210208-542.qcow2",
      },
      "10"  = {
        "cloud_init" = "debian",
        "url" = "https://cdimage.debian.org/cdimage/cloud/buster/20210208-542/debian-10-genericcloud-amd64-20210208-542.qcow2",
      },
      "10-20210208-542"  = {
        "cloud_init" = "debian",
        "url" = "https://cdimage.debian.org/cdimage/cloud/buster/20210208-542/debian-10-genericcloud-amd64-20210208-542.qcow2",
      },
    },
#    "ubuntu" = {
#      "latest" = {
#        "cloud_init" = "debian",
#        "url" = "https://cloud-images.ubuntu.com/releases/groovy/release/ubuntu-20.10-server-cloudimg-amd64-disk-kvm.img",
#      },
#      "20.10"  = {
#        "cloud_init" = "debian",
#        "url" = "https://cloud-images.ubuntu.com/releases/groovy/release/ubuntu-20.10-server-cloudimg-amd64-disk-kvm.img",
#      },
#      "20.04"  = {
#        "cloud_init" = "debian",
#        "url" = "https://cloud-images.ubuntu.com/releases/focal/release/ubuntu-20.04-server-cloudimg-amd64-disk-kvm.img",
#      },
#      "19.04"  = {
#        "cloud_init" = "debian",
#        "url" = "https://cloud-images.ubuntu.com/releases/disco/release/ubuntu-19.04-server-cloudimg-amd64.img",
#      },
#      "18.04"  = {
#        "cloud_init" = "debian",
#        "url" = "https://cloud-images.ubuntu.com/releases/bionic/release/ubuntu-18.04-server-cloudimg-amd64.img",
#      },
#      "17.04"  = {
#        "cloud_init" = "debian",
#        "url" = "http://cloud-images-archive.ubuntu.com/releases/zesty/release-20171208/ubuntu-17.04-server-cloudimg-amd64.img",
#      },
#      "16.04"  = {
#        "cloud_init" = "debian",
#        "url" = "https://cloud-images.ubuntu.com/releases/xenial/release/ubuntu-16.04-server-cloudimg-amd64-disk1.img"
#      },
#    },
#    "centos" = {
#      "latest"   = {
#        "cloud_init" = "centos",
#        "url" = "https://cloud.centos.org/centos/8/x86_64/images/CentOS-8-GenericCloud-8.3.2011-20201204.2.x86_64.qcow2",
#      },
#      "8"        = {
#        "cloud_init" = "centos",
#        "url" = "https://cloud.centos.org/centos/8/x86_64/images/CentOS-8-GenericCloud-8.3.2011-20201204.2.x86_64.qcow2",
#      },
#      "8-stream" = {
#        "cloud_init" = "centos",
#        "url" = "https://cloud.centos.org/centos/8-stream/x86_64/images/CentOS-Stream-GenericCloud-8-20201217.0.x86_64.qcow2",
#      },
#      "7"        = {
#        "cloud_init" = "centos",
#        "url" = "https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-2009.qcow2",
#      },
#      "6"        = {
#        "cloud_init" = "centos",
#        "url" = "https://cloud.centos.org/centos/6/images/CentOS-6-x86_64-GenericCloud.qcow2"
#      },
#    }
  }


  # Cloud Init
  # ========================
  templates = {
    "centos" = {
      "template" = "${path.module}/templates/cloud_centos_generic.yml",
      "vars" = {}
    },
    "debian" = {
      "template" = "${path.module}/templates/cloud_debian_generic.yml",
      "vars" = {
        "authorized_key" = "",
        "authorized_keys" = [],
        "commands" = [],
        "packages" = [],
        "allow_passwords" = true,
      }
    }
  }

  template_default = {
      "authorized_key" = var.authorized_key,
      "password_hash" = var.password_hash,
      "user" = var.user,
      "domain" = var.domain,
      "hostname" = var.hostname,
    }

}


locals {
  os = local.distro[var.os_name][var.os_version]

  # Generate template
  cloud_template = try(local.templates[var.cloud_init], local.templates[local.os.cloud_init])
  template_vars = merge(local.cloud_template.vars, local.template_default, var.cloud_init_vars)
}


output "distro" {
  value = local.distro
}


output "os" {
  value = local.os
}

output "cloud_init" {
  value = local.cloud_template
}
output "template_vars" {
  value = local.template_vars
}


output "template" {
  #value = data.template_file.user_data.rendered
  value = templatefile("${local.cloud_template.template}", local.template_vars)
}