package src

import (
	"context"
	"encoding/json"
	"os"
)

type Config struct {
	Listen           string `json:"LISTEN"`
	ConnectionDriver string `json:"CONNECTION_DRIVER"`
	ConnectionString string `json:"CONNECTION_STRING"`
	db               DB
}

func NewConfig(ctx context.Context) (Config, error) {
	config, err := newConfig()
	if err != nil {
		return config, err
	}

	db, err := NewDB(ctx, config.ConnectionDriver, config.ConnectionString)
	if err != nil {
		return config, err
	}
	config.db = db

	return config, nil
}

func newConfig() (Config, error) {
	config := Config{
		Listen:           ":10000",
		ConnectionDriver: "sqlite",
		ConnectionString: "/tmp/red-apter.db",
	}
	b, _ := json.Marshal(config)
	var m map[string]any
	if err := json.Unmarshal(b, &m); err != nil {
		return config, err
	}
	for k := range m {
		if v := os.Getenv(k); v != "" {
			m[k] = v
		}
	}
	b2, _ := json.Marshal(m)
	if err := json.Unmarshal(b2, &config); err != nil {
		return config, err
	}
	return config, nil
}