terraform {
  required_version = ">= 1.0"

  required_providers {
    coder = {
      source  = "coder/coder"
      version = ">= 0.12"
    }
  }
}

variable "display_name" {
    default = "AWS Region"
    description = "The display name of the parameter."
    type = string
}

variable "description" {
    default = "The region to deploy workspace infrastructure."
    description = "The description of the parameter."
    type = string
}

variable "default" {
    default = "us-east-1"
    description = "The default region to use if no region is specified."
    type = string
}

variable "mutable" {
    default = false
    description = "Whether the parameter can be changed after creation."
    type = bool
}

variable "custom_names" {
    default = {}
    description = "A map of custom display names for region IDs."
    type = map(string)
}

variable "custom_icons" {
    default = {}
    description = "A map of custom icons for region IDs."
    type = map(string)
}

variable "exclude" {
    default = []
    description = "A list of region IDs to exclude."
    type = list(string)
}

locals {
  # This is a static list because the regions don't change _that_
  # frequently and including the `aws_regions` data source requires
  # the provider, which requires a region.
  regions = {
    "ap-northeast-1" = {
    name = "Asia Pacific (Tokyo)"
    icon = "/emojis/1f1ef-1f1f5.png"
  }
  "ap-northeast-2" = {
    name = "Asia Pacific (Seoul)"
    icon = "/emojis/1f1f0-1f1f7.png"
  }
  "ap-northeast-3" = {
    name = "Asia Pacific (Osaka)"
    icon = "/emojis/1f1ef-1f1f5.png"
  }
  "ap-south-1" = {
    name = "Asia Pacific (Mumbai)"
    icon = "/emojis/1f1ee-1f1f3.png"
  }
  "ap-southeast-1" = {
    name = "Asia Pacific (Singapore)"
    icon = "/emojis/1f1f8-1f1ec.png"
  }
  "ap-southeast-2" = {
    name = "Asia Pacific (Sydney)"
    icon = "/emojis/1f1e6-1f1fa.png"
  }
  "ca-central-1" = {
    name = "Canada (Central)"
    icon = "/emojis/1f1e8-1f1e6.png"
  }
  "eu-central-1" = {
    name = "EU (Frankfurt)"
    icon = "/emojis/1f1ea-1f1fa.png"
  }
  "eu-north-1" = {
    name = "EU (Stockholm)"
    icon = "/emojis/1f1ea-1f1fa.png"
  }
  "eu-west-1" = {
    name = "EU (Ireland)"
    icon = "/emojis/1f1ea-1f1fa.png"
  }
  "eu-west-2" = {
    name = "EU (London)"
    icon = "/emojis/1f1ea-1f1fa.png"
  }
  "eu-west-3" = {
    name = "EU (Paris)"
    icon = "/emojis/1f1ea-1f1fa.png"
  }
  "sa-east-1" = {
    name = "South America (São Paulo)"
    icon = "/emojis/1f1e7-1f1f7.png"
  }
  "us-east-1" = {
    name = "US East (N. Virginia)"
    icon = "/emojis/1f1fa-1f1f8.png"
  }
  "us-east-2" = {
    name = "US East (Ohio)"
    icon = "/emojis/1f1fa-1f1f8.png"
  }
  "us-west-1" = {
    name = "US West (N. California)"
    icon = "/emojis/1f1fa-1f1f8.png"
  }
  "us-west-2" = {
    name = "US West (Oregon)"
    icon = "/emojis/1f1fa-1f1f8.png"
  }
  }
}

data "coder_parameter" "region" {
    name = "aws_region"
    display_name = var.display_name
    description = var.description
    default = var.default
    mutable = var.mutable
    dynamic "option" {
        for_each = { for k, v in local.regions : k => v if !(contains(var.exclude, k)) }
        content {
            name = try(var.custom_names[option.key], option.value.name)
            icon = try(var.custom_icons[option.key], option.value.icon)
            value = option.key
        }
    }
}

output "value" {
    value = data.coder_parameter.region.value
}