// Package config holds process bootstrap configuration: everything needed
// before the database is even open. Runtime/admin-tunable settings (ACME
// email, retention, trusted proxies, etc.) live in the database instead —
// see internal/database's settings table — so they can change without a
// restart.
package config

import (
	"flag"
	"os"
)

type Config struct {
	DataDir   string
	DBPath    string
	HTTPAddr  string
	HTTPSAddr string
	AdminAddr string
}

func Default() Config {
	return Config{
		DataDir:   "./data",
		DBPath:    "./data/vibeproxy.db",
		HTTPAddr:  ":80",
		HTTPSAddr: ":443",
		AdminAddr: ":8081",
	}
}

// RegisterFlags binds cfg's fields to flags on fs, seeded from environment
// variables (VIBEPROXY_*) so the same binary works under systemd or Docker
// without a wrapper script.
func RegisterFlags(fs *flag.FlagSet, cfg *Config) {
	fs.StringVar(&cfg.DataDir, "data-dir", envOr("VIBEPROXY_DATA_DIR", cfg.DataDir), "directory for the database, certificates, and backups")
	fs.StringVar(&cfg.DBPath, "db-path", envOr("VIBEPROXY_DB_PATH", cfg.DBPath), "path to the SQLite database file")
	fs.StringVar(&cfg.HTTPAddr, "http-addr", envOr("VIBEPROXY_HTTP_ADDR", cfg.HTTPAddr), "address for the plain HTTP proxy listener")
	fs.StringVar(&cfg.HTTPSAddr, "https-addr", envOr("VIBEPROXY_HTTPS_ADDR", cfg.HTTPSAddr), "address for the HTTPS proxy listener")
	fs.StringVar(&cfg.AdminAddr, "admin-addr", envOr("VIBEPROXY_ADMIN_ADDR", cfg.AdminAddr), "address for the admin web UI, REST API, and /metrics, /healthz, /readyz")
}

func envOr(key, def string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return def
}