package config

import (
	"os"
	"strings"
)

type Config struct {
	OpenAIAPIKey  string
	SessionSecret string
	DataDir       string
	Port          string
	AdminUsers    []AdminUser
	LLMModel      string // defaults to gpt-4o-mini
}

type AdminUser struct {
	Name     string
	Password string
}

func Load() *Config {
	cfg := &Config{
		OpenAIAPIKey:  os.Getenv("OPENAI_API_KEY"),
		SessionSecret: os.Getenv("SESSION_SECRET"),
		DataDir:       envOr("DATA_DIR", "./data"),
		Port:          envOr("PORT", "8080"),
		LLMModel:      envOr("LLM_MODEL", "gpt-4o-mini"),
	}
	cfg.AdminUsers = parseAdminUsers(os.Getenv("ADMIN_USERS"))
	return cfg
}

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

func parseAdminUsers(raw string) []AdminUser {
	if raw == "" {
		return nil
	}
	var users []AdminUser
	for _, pair := range strings.Split(raw, ",") {
		pair = strings.TrimSpace(pair)
		name, pass, ok := strings.Cut(pair, ":")
		if !ok || name == "" || pass == "" {
			continue
		}
		users = append(users, AdminUser{Name: name, Password: pass})
	}
	return users
}