app-api/internal/config/config.go

package config

import (
	"fmt"
	"os"
	"strconv"
)

type Config struct {
	Env               string
	Host              string
	Port              int
	Database          DatabaseConfig
	Meilisearch       MeilisearchConfig
	Redis             RedisConfig
	Equalize          EqualizeConfig
	S3                S3Config
	EnablePersistTask bool
}

func Load() (*Config, error) {
	port, err := strconv.Atoi(getEnv("APP_PORT", "8080"))
	if err != nil {
		return nil, fmt.Errorf("invalid APP_PORT: %w", err)
	}

	env := getEnv("APP_ENV", "development")

	db, err := loadDatabase(env)
	if err != nil {
		return nil, err
	}
	if err := db.validate(env); err != nil {
		return nil, err
	}

	ms := loadMeilisearch(env)
	if err := ms.validate(); err != nil {
		return nil, err
	}

	rd := loadRedis(env)
	if err := rd.validate(); err != nil {
		return nil, err
	}

	eq := loadEqualize(env)
	s3cfg := loadS3(env)

	return &Config{
		Env:               env,
		Host:              getEnv("APP_HOST", "0.0.0.0"),
		Port:              port,
		Database:          db,
		Meilisearch:       ms,
		Redis:             rd,
		Equalize:          eq,
		S3:                s3cfg,
		EnablePersistTask: getEnv("ENABLE_PERSIST_TASK", "false") == "true",
	}, nil
}

func (c *Config) Addr() string {
	return fmt.Sprintf("%s:%d", c.Host, c.Port)
}

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