# variables.tf

# Define datasources (non-sensitive metadata only)
variable "datasources" {
  description = <<EOT
Map of datasources to create. Keys are datasource names.
Each datasource specifies type (prometheus/loki/tempo), keys to lookup URL/user/password,
and optional configurations for linking data sources.
EOT
  type = map(object({
    type       = string           # e.g., prometheus, loki, tempo
    url_key    = string           # key for URL lookup in datasource_urls map
    user_key   = string           # key for username lookup in datasource_users map
    pass_key   = string           # key for password lookup in datasource_passwords map
    is_default = optional(bool)   # true if this datasource should be Grafana default
    json_data  = optional(map(any)) # Initial, non-dependent JSON data

    # Optional: For Loki, to link to a tracing datasource like Tempo.
    derived_fields = optional(list(object({
      target_datasource_name = string # The name of the target datasource (e.g., "tempo-main")
      matcher_regex          = string # Regex to find the trace ID in logs.
      name                   = string # Name for the derived field (e.g., "traceID")
      url                    = string # URL template, e.g., "$${__value.raw}"
    })))

    # Optional: For Tempo, to link to a logging datasource like Loki.
    traces_to_logs = optional(object({
      target_datasource_name = string # The name of the target datasource (e.g., "loki-main")
      query                  = string # The query to run in the target datasource.
      custom_query           = optional(bool)
      filter_by_span_id      = optional(bool)
      filter_by_trace_id     = optional(bool)
      span_start_time_shift  = optional(string)
      span_end_time_shift    = optional(string)
    }))
  }))
}

# Sensitive maps for URLs, usernames, passwords
variable "datasource_urls" {
  description = "Map of datasource URLs, keyed by url_key"
  type        = map(string)
  sensitive   = true
}

variable "datasource_users" {
  description = "Map of datasource usernames, keyed by user_key"
  type        = map(string)
  sensitive   = true
}

variable "datasource_passwords" {
  description = "Map of datasource passwords, keyed by pass_key"
  type        = map(string)
  sensitive   = true
}