// Package config loads control-plane settings from the environment (see architecture plan §1).
package config

import (
	"os"
	"path/filepath"
	"strings"
)

// Env holds shared process configuration for cmd/* entrypoints.
type Env struct {
	HTTPAddr    string
	ServiceName string
	GitSHA      string
	// DatabaseURL is the PostgreSQL DSN when SQL-backed repositories are wired (empty in dev).
	DatabaseURL string
	// BrokerURL is NATS/Redis when the reference profile uses a message broker (empty in microVPS).
	BrokerURL string
	// RuntimeLogsDir is the absolute host path to Docker runtime log files (evobgp-all only).
	RuntimeLogsDir string
	// RuntimeLogsPolicyTenant overrides which tenant global_settings drive auto-cleanup (optional).
	RuntimeLogsPolicyTenant string
}

// Load reads EVOBGP_* environment variables with safe defaults.
func Load() Env {
	e := Env{
		HTTPAddr: ":8080",
	}
	if v := strings.TrimSpace(os.Getenv("EVOBGP_HTTP_ADDR")); v != "" {
		e.HTTPAddr = v
	}
	if v := strings.TrimSpace(os.Getenv("EVOBGP_SERVICE")); v != "" {
		e.ServiceName = v
	}
	e.GitSHA = strings.TrimSpace(os.Getenv("EVOBGP_GIT_SHA"))
	e.DatabaseURL = strings.TrimSpace(os.Getenv("EVOBGP_DATABASE_URL"))
	e.BrokerURL = strings.TrimSpace(os.Getenv("EVOBGP_BROKER_URL"))
	e.RuntimeLogsPolicyTenant = strings.TrimSpace(os.Getenv("EVOBGP_RUNTIME_LOGS_POLICY_TENANT"))
	if v := strings.TrimSpace(os.Getenv("EVOBGP_RUNTIME_LOGS_DIR")); v != "" {
		if abs, err := filepath.Abs(v); err == nil {
			e.RuntimeLogsDir = abs
		} else {
			e.RuntimeLogsDir = v
		}
	}
	return e
}