package config

import (
	"fmt"
	"github.com/caarlos0/env"
	"strings"
)

type Config struct {
	E621APIKey   string `env:"E621_API_KEY,required"`
	E621Username string `env:"E621_USERNAME,required"`
	DBType       string `env:"DB_TYPE,required"`
	DBEndpoint   string `env:"DB_URL,required"`
	DBUsername   string `env:"DB_USERNAME,required"`
	DBPassword   string `env:"DB_PASSWORD,required"`
	LogLevel     string `env:"LOG_LEVEL" envDefault:"INFO"`
	LogFormat    string `env:"LOG_FORMAT" envDefault:"PLAIN"`
	Neo4jDebug   bool   `env:"NEO4J_DEBUG" envDefault:"FALSE"`
}

// LoadConfig loads the configuration from environment variables
func LoadConfig() (*Config, error) {
	config := &Config{}
	if err := env.Parse(config); err != nil {
		return nil, fmt.Errorf("config: error parsing configuration: %w", err)
	}

	logLevel := strings.ToUpper(config.LogLevel)
	logFormat := strings.ToUpper(config.LogFormat)

	if logLevel != "FATAL" && logLevel != "ERROR" && logLevel != "WARN" && logLevel != "INFO" && logLevel != "DEBUG" && logLevel != "TRACE" {
		return nil, fmt.Errorf("config: valid levels for erros are: FATAL, ERROR, WARN, INFO, DEBUG, TRACE")
	}

	if logFormat != "PLAIN" && logFormat != "JSON" {
		return nil, fmt.Errorf("config: valit formatters are: PLAIN, JSON")
	}

	return config, nil
}