package app

import (
	"fmt"
	"os"
	"path"

	auxcfg "git.kundeng.us/phoenix/textsender-models/tx0/config/auxiliary"
	"github.com/joho/godotenv"
)

const App_Name = "catapult"

type App struct {
	ApiUrl            string
	AuthUrl           string
	ServiceUsername   string
	ServicePassphrase string
	TwilioConfig      *auxcfg.TwilioConfig
}

func Load() (*App, error) {
	err := godotenv.Load()
	if err != nil {
		cwd, _ := os.Getwd()
		envPath := path.Join(cwd, "../..", ".env")
		if err = godotenv.Load(envPath); err != nil {
			prevPath := path.Join(envPath, "../..", ".env")
			if err = godotenv.Load(prevPath); err != nil {
				return nil, fmt.Errorf("Error loading .env file: %w", err)
			}
		}
	}

	apiUrl := os.Getenv("API_URL")
	authUrl := os.Getenv("AUTH_URL")
	serviceUsername := os.Getenv("SERVICE_USERNAME")
	servicePassphrase := os.Getenv("SERVICE_PASSPHRASE")

	if len(apiUrl) == 0 {
		return nil, fmt.Errorf("Api Url not provided")
	} else if len(authUrl) == 0 {
		return nil, fmt.Errorf("Auth url not provided")
	} else if len(serviceUsername) == 0 {
		return nil, fmt.Errorf("Service username not provided")
	} else if len(servicePassphrase) == 0 {
		return nil, fmt.Errorf("Service passphrase not provided")
	} else {
		if cfg, err := loadTwilioConfig(); err != nil {
			return nil, err
		} else {
			return &App{
				ApiUrl: apiUrl, AuthUrl: authUrl, ServiceUsername: serviceUsername, ServicePassphrase: servicePassphrase, TwilioConfig: cfg,
			}, nil
		}
	}
}

func loadTwilioConfig() (*auxcfg.TwilioConfig, error) {
	authSid := os.Getenv("TWILIO_AUTH_SID")
	serviceSid := os.Getenv("TWILIO_SERVICE_SID")
	authToken := os.Getenv("TWILIO_AUTH_TOKEN")
	phoneNumber := os.Getenv("TWILIO_PHONE_NUMBER")

	if len(authSid) == 0 {
		return nil, fmt.Errorf("Twilio config auth sid not provided")
	} else if len(serviceSid) == 0 {
		return nil, fmt.Errorf("Twilio config service sid not provided")
	} else if len(authToken) == 0 {
		return nil, fmt.Errorf("Twilio config token not provided")
	} else if len(phoneNumber) == 0 {
		return nil, fmt.Errorf("Twilio config phone number not provided")
	} else {
		cfg := auxcfg.TwilioConfig{}
		cfg.AccountSID = authSid
		cfg.AuthToken = authToken
		cfg.ServiceSID = serviceSid
		cfg.Number = phoneNumber
		return &cfg, nil
	}
}