// 2026-03-18 — добавлены locals для извлечения credentials из vault_secrets (без хардкода).
//              Для сверки хардкод остаётся в terraform.tfvars на этапе разработки.
//              sless_function и sless_job закомментированы — сначала проверяется сетевое соединение.

# Актуальные credentials из vault_secrets (authoritatively) — vault синхронизирован с кластером.
# Структура vault_secrets["users"]: JSON-строка {"username": {"password": "...", "username": "..."}}
locals {
  pg_creds_map = jsondecode(nubes_postgres.npg.vault_secrets["users"])
  pg_username  = nubes_postgres_user.pg_user.username
  pg_password  = local.pg_creds_map[local.pg_username]["password"]
  pg_host      = nubes_postgres.npg.state_out_flat["internalConnect.master"]
  pg_database  = nubes_postgres_database.db.db_name
}

resource "nubes_postgres" "npg" {
  resource_name = "teststand-pg-2"
  # s3_uid                = "s01325"
  s3_uid             = var.s3_uid
  resource_realm     = var.realm
  resource_instances = 1
  resource_memory    = 512
  resource_c_p_u     = 500
  resource_disk      = "1"
  app_version        = "17"
  json_parameters = jsonencode({
    log_connections    = "off"
    log_disconnections = "off"
  })
  enable_pg_pooler_master      = false
  enable_pg_pooler_slave       = false
  allow_no_s_s_l               = false
  auto_scale                   = false
  auto_scale_percentage        = 10
  auto_scale_tech_window       = 0
  auto_scale_quota_gb          = "1"
  need_external_address_master = false

  # suspend_on_destroy = false
  operation_timeout        = "11m"
  adopt_existing_on_create = true
}

resource "nubes_postgres_user" "pg_user" {
  postgres_id              = nubes_postgres.npg.id
  username                 = "u-user0"
  role                     = "ddl_user"
  adopt_existing_on_create = true
}

resource "nubes_postgres_database" "db" {
  postgres_id              = nubes_postgres.npg.id
  db_name                  = "db_terra"
  db_owner                 = nubes_postgres_user.pg_user.username
  adopt_existing_on_create = true
  # suspend_on_destroy = false
}

# Служебная функция выполняет SQL-операторы из event_json.
# Credentials берутся из locals (vault_secrets) — без хардкода.
# Для сверки хардкод остаётся в terraform.tfvars.
resource "sless_function" "postgres_sql_runner_create_table" {
  name        = "pg-create-table-runner"
  runtime     = "python3.11"
  entrypoint  = "sql_runner.run_sql"
  memory_mb   = 128
  timeout_sec = 30

  env_vars = {
    PGHOST     = local.pg_host
    PGPORT     = "5432"
    PGDATABASE = local.pg_database
    PGUSER     = local.pg_username
    PGPASSWORD = local.pg_password
    PGSSLMODE  = "require"
    # Для сверки (должно совпадать с vault):
    # PGUSER     = var.pg_user
    # PGPASSWORD = var.pg_password
  }

  source_dir = "${path.module}/code/sql-runner"
}

resource "sless_job" "postgres_table_init_job" {
  name             = "pg-create-table-job-main-v13"
  function         = sless_function.postgres_sql_runner_create_table.name
  wait_timeout_sec = 180
  run_id           = 13

  event_json = jsonencode({
    statements = [
      "CREATE TABLE IF NOT EXISTS terraform_demo_table (id serial PRIMARY KEY, title text NOT NULL, created_at timestamp DEFAULT now())"
    ]
  })

  depends_on = [nubes_postgres_database.db]
}

# HTTP-функция на NodeJS: возвращает версию PG-сервера и счётчик строк в таблице.
# Единственная функция примера на nodejs20 — проверка что JS runtime работает.
# Доступна по URL: https://sless.kube5s.ru/fn/<namespace>/pg-info
resource "sless_function" "pg_info" {
  name        = "pg-info"
  runtime     = "nodejs20"
  entrypoint  = "pg_info.info"
  memory_mb   = 128
  timeout_sec = 15

  env_vars = {
    PGHOST     = local.pg_host
    PGPORT     = "5432"
    PGDATABASE = local.pg_database
    PGUSER     = local.pg_username
    PGPASSWORD = local.pg_password
    PGSSLMODE  = "require"
  }

  source_dir = "${path.module}/code/pg-info"

  depends_on = [sless_job.postgres_table_init_job]
}

resource "sless_trigger" "pg_info_http" {
  name     = "pg-info-http"
  type     = "http"
  function = sless_function.pg_info.name
  enabled  = true
}

# HTTP-функции чтения и записи строк terraform_demo_table — в одном файле table_rw.py.
# list_rows (GET) — читает все строки; add_row (POST {title}) — вставляет строку.
# Доступны по URL: https://sless.kube5s.ru/fn/<namespace>/pg-table-reader
#                 https://sless.kube5s.ru/fn/<namespace>/pg-table-writer
resource "sless_function" "postgres_table_reader" {
  name        = "pg-table-reader"
  runtime     = "python3.11"
  entrypoint  = "table_rw.list_rows"
  memory_mb   = 128
  timeout_sec = 30

  env_vars = {
    PGHOST     = local.pg_host
    PGPORT     = "5432"
    PGDATABASE = local.pg_database
    PGUSER     = local.pg_username
    PGPASSWORD = local.pg_password
    PGSSLMODE  = "require"
  }

  source_dir = "${path.module}/code/table-rw"

  depends_on = [sless_job.postgres_table_init_job]
}

resource "sless_trigger" "postgres_table_reader_http" {
  name     = "pg-table-reader-http"
  type     = "http"
  function = sless_function.postgres_table_reader.name
  enabled  = true
}

output "table_reader_url" {
  value = sless_trigger.postgres_table_reader_http.url
}

resource "sless_function" "postgres_table_writer" {
  name        = "pg-table-writer"
  runtime     = "python3.11"
  entrypoint  = "table_rw.add_row"
  memory_mb   = 128
  timeout_sec = 30

  env_vars = {
    PGHOST     = local.pg_host
    PGPORT     = "5432"
    PGDATABASE = local.pg_database
    PGUSER     = local.pg_username
    PGPASSWORD = local.pg_password
    PGSSLMODE  = "require"
  }

  source_dir = "${path.module}/code/table-rw"

  depends_on = [sless_job.postgres_table_init_job]
}

resource "sless_trigger" "postgres_table_writer_http" {
  name     = "pg-table-writer-http"
  type     = "http"
  function = sless_function.postgres_table_writer.name
  enabled  = true
}

output "table_writer_url" {
  value = sless_trigger.postgres_table_writer_http.url
}