package config

import (
	sharedpostgres "knowfoolery/backend/shared/infra/database/postgres"
	"knowfoolery/backend/shared/infra/observability/logging"
	"knowfoolery/backend/shared/infra/observability/metrics"
	"knowfoolery/backend/shared/infra/observability/tracing"
	"knowfoolery/backend/shared/infra/utils/envutil"
)

// Config holds runtime service configuration.
type Config struct {
	AppName string

	Port                  int
	Env                   string
	LogLevel              string
	AdminListDefaultLimit int
	AdminListMaxLimit     int

	Postgres sharedpostgres.Config
	Tracing  tracing.Config
	Metrics  metrics.Config
	Logging  logging.Config

	ZitadelBaseURL  string
	ZitadelIssuer   string
	ZitadelAudience string
	ZitadelClientID string
	ZitadelSecret   string
}

// FromEnv builds service config from environment variables.
func FromEnv() Config {
	env := envutil.String("ENVIRONMENT", "development")
	appName := "Know Foolery - User Service"
	serviceName := "user-service"

	logCfg := logging.DefaultConfig()
	logCfg.ServiceName = serviceName
	logCfg.Environment = env
	logCfg.Level = envutil.String("LOG_LEVEL", logCfg.Level)

	traceCfg := tracing.ConfigFromEnv()
	if traceCfg.ServiceName == "knowfoolery" {
		traceCfg.ServiceName = serviceName
	}
	traceCfg.Environment = env

	metricsCfg := metrics.ConfigFromEnv()
	if metricsCfg.ServiceName == "knowfoolery" {
		metricsCfg.ServiceName = serviceName
	}

	return Config{
		AppName: appName,

		Port:                  envutil.Int("USER_SERVICE_PORT", 8082),
		Env:                   env,
		LogLevel:              logCfg.Level,
		AdminListDefaultLimit: envutil.Int("USER_ADMIN_LIST_DEFAULT_LIMIT", 50),
		AdminListMaxLimit:     envutil.Int("USER_ADMIN_LIST_MAX_LIMIT", 200),

		Postgres: sharedpostgres.ConfigFromEnv(),
		Tracing:  traceCfg,
		Metrics:  metricsCfg,
		Logging:  logCfg,

		ZitadelBaseURL:  envutil.String("ZITADEL_URL", ""),
		ZitadelIssuer:   envutil.String("ZITADEL_ISSUER", ""),
		ZitadelAudience: envutil.String("ZITADEL_AUDIENCE", ""),
		ZitadelClientID: envutil.String("ZITADEL_CLIENT_ID", ""),
		ZitadelSecret:   envutil.String("ZITADEL_CLIENT_SECRET", ""),
	}
}