terraform {
  required_providers {
    fission = {
      source  = "nail/fission"
      version = "~> 0.2.0"
    }
  }
}

provider "fission" {
  kubeconfig_path = var.kubeconfig_path
  namespace       = var.namespace
}

# ── Переменные ───────────────────────────────────────────────────────

variable "kubeconfig_path" {
  default     = "/home/naeel/.kube/config"
  description = "Путь к kubeconfig."
}

variable "namespace" {
  default     = "fission-weather"
  description = "Namespace для функций и триггеров."
}

variable "sqs_access_key" {
  sensitive   = true
  description = "SQS Access Key."
}

variable "sqs_secret_key" {
  sensitive   = true
  description = "SQS Secret Key."
}

variable "pg_dsn" {
  sensitive   = true
  description = "PostgreSQL DSN для записи метрик. Пример: postgresql://user:pass@host:5432/db?sslmode=disable"
}

# ── IoT-устройство — виртуальная метеостанция ────────────────────────

resource "fission_iot_device" "weather_station" {
  name      = "weather-station"
  device_id = "weather-station-01"
  namespace = "sless"
  metadata = {
    type     = "weather-station"
    location = "multi-city"
    cities   = "Moscow,London,Paphos,Ulyanovsk,Santiago"
  }
}

# ── Python environment ───────────────────────────────────────────────

resource "fission_environment" "python" {
  name      = "weather-python"
  image     = "naeel/fission-python-env:v1.1"
  version   = 2
  namespace = var.namespace
}

# ── Пакет: fetcher ───────────────────────────────────────────────────

resource "fission_package" "fetcher" {
  name        = "weather-fetcher-pkg"
  environment = fission_environment.python.name
  namespace   = var.namespace
  source_dir  = "${path.module}/fetcher"
  deploy_type = "literal"
}

# ── Пакет: consumer ──────────────────────────────────────────────────

resource "fission_package" "consumer" {
  name        = "weather-consumer-pkg"
  environment = fission_environment.python.name
  namespace   = var.namespace
  source_dir  = "${path.module}/consumer"
  deploy_type = "literal"
}

# ── Функция: fetcher (читает Open-Meteo, пишет в SQS) ───────────────
# Open-Meteo: бесплатный API без ключа. https://open-meteo.com
resource "fission_function" "fetcher" {
  name         = "weather-fetcher"
  environment  = fission_environment.python.name
  namespace    = var.namespace
  package_name = fission_package.fetcher.name
  entrypoint   = "main"
  # Env vars задаются через K8s Secret weather-fetcher-env (namespace: var.namespace)
  # Ключи: SQS_ACCESS_KEY, SQS_SECRET_KEY
}

# ── CRON trigger: каждые 10 минут ────────────────────────────────────

resource "fission_cron_trigger" "fetcher" {
  name      = "weather-cron"
  function  = fission_function.fetcher.name
  namespace = var.namespace
  cron      = "*/10 * * * *"
}

# ── Функция: consumer (читает из SQS, пишет в PG) ────────────────────

resource "fission_function" "consumer" {
  name         = "weather-consumer"
  environment  = fission_environment.python.name
  namespace    = var.namespace
  package_name = fission_package.consumer.name
  entrypoint   = "main"
  # Env vars: PG_DSN задаётся через K8s Secret weather-consumer-env
}

# ── MQ trigger: SQS queue → consumer function ────────────────────────

resource "fission_mq_trigger" "weather" {
  name         = "weather-mq"
  function     = fission_function.consumer.name
  namespace    = var.namespace
  queue        = "weather-data"
  access_key   = var.sqs_access_key
  secret_key   = var.sqs_secret_key
  sqs_endpoint = "http://shared-sqs.shared-sqs.svc.cluster.local:4100"
}

# ── Outputs ──────────────────────────────────────────────────────────

output "iot_device_phase" {
  value       = fission_iot_device.weather_station.phase
  description = "Статус IoT-устройства weather-station."
}

output "iot_mqtt_username" {
  value       = fission_iot_device.weather_station.mqtt_username
  description = "MQTT username для weather-station."
}

output "iot_topic_prefix" {
  value       = fission_iot_device.weather_station.topic_prefix
  description = "MQTT topic prefix для weather-station."
}