package hws

import (
	"time"

	"git.haelnorr.com/h/golib/env"
)

type Config struct {
	Host              string        // ENV HWS_HOST: Host to listen on (default: 127.0.0.1)
	Port              uint64        // ENV HWS_PORT: Port to listen on (default: 3000)
	TrustedHost       string        // ENV HWS_TRUSTED_HOST: Domain/Hostname to accept as trusted (default: same as Host)
	GZIP              bool          // ENV HWS_GZIP: Flag for GZIP compression on requests (default: false)
	ReadHeaderTimeout time.Duration // ENV HWS_READ_HEADER_TIMEOUT: Timeout for reading request headers in seconds (default: 2)
	WriteTimeout      time.Duration // ENV HWS_WRITE_TIMEOUT: Timeout for writing requests in seconds (default: 10)
	IdleTimeout       time.Duration // ENV HWS_IDLE_TIMEOUT: Timeout for idle connections in seconds (default: 120)
}

// ConfigFromEnv returns a Config struct loaded from the environment variables
func ConfigFromEnv() (*Config, error) {
	host := env.String("HWS_HOST", "127.0.0.1")
	trustedHost := env.String("HWS_TRUSTED_HOST", host)

	cfg := &Config{
		Host:              host,
		Port:              env.UInt64("HWS_PORT", 3000),
		TrustedHost:       trustedHost,
		GZIP:              env.Bool("HWS_GZIP", false),
		ReadHeaderTimeout: time.Duration(env.Int("HWS_READ_HEADER_TIMEOUT", 2)) * time.Second,
		WriteTimeout:      time.Duration(env.Int("HWS_WRITE_TIMEOUT", 10)) * time.Second,
		IdleTimeout:       time.Duration(env.Int("HWS_IDLE_TIMEOUT", 120)) * time.Second,
	}

	return cfg, nil
}