package config

import (
	"git.yuntuo.hk/k2safe/go-omni/config"
	"git.yuntuo.hk/k2safe/go-omni/logx"
	"os"
	"strings"
	"time"
)

type Config struct {
	Server config.Config `json:"server"`
}

func Default() Config {
	server := config.Default()
	server.Address = "127.0.0.1:8080"
	server.EnableLogger = true
	server.SlowRequestThreshold = 500 * time.Millisecond
	server.Log.Service = "example.com/managed"
	server.Log.Format = "json"
	server.Log.Output = "stderr"
	return Config{Server: server}
}

// Load applies defaults -> file -> typed environment -> validation.
// New fields automatically use GO_OMNI_<JSON_PATH>, or an explicit env tag.
func Load(path string) (Config, error) {
	cfg := Default()
	var err error
	cfg, err = config.ApplyDefaults(cfg)
	if err != nil {
		return Config{}, err
	}
	if path != "" {
		cfg, err = config.DecodeFile(path, cfg)
		if err != nil {
			return Config{}, err
		}
	}
	cfg, err = config.OverlayEnv(cfg, config.EnvOptions{Prefix: "GO_OMNI_"})
	if err != nil {
		return Config{}, err
	}
	// Preserve the documented framework aliases (HTTP_ADDR, LOG_LEVEL, etc).
	cfg.Server, err = config.ApplyEnv(cfg.Server, "")
	if err != nil {
		return Config{}, err
	}
	if output := strings.TrimSpace(os.Getenv("GO_OMNI_LOG_OUTPUT")); output != "" && strings.TrimSpace(os.Getenv("GO_OMNI_LOG_FILE")) == "" {
		cfg.Server.Log.File = ""
		cfg.Server.Log.Rotation = logx.RotationConfig{}
	}
	return cfg, cfg.Validate()
}
func (c Config) Validate() error {
	if err := c.Server.Validate(); err != nil {
		return err
	}

	return nil
}