package server

import (
	"fmt"
	"github.com/rs/zerolog/log"
	"os"
	"time"
)

type Config struct {
	Namespace           string
	BaseURL             string
	GinDebug            bool
	ServerIP            string
	ServerPort          string
	DBFile              string
	RequestTimeout      time.Duration
	ReturnRawErrors     bool
	DummyFirebase       bool
	FirebaseTokenURI    string
	FirebaseProjectID   string
	FirebasePrivKeyID   string
	FirebaseClientMail  string
	FirebasePrivateKey  string
	DummyGoogleAPI      bool
	GoogleAPITokenURI   string
	GoogleAPIPrivKeyID  string
	GoogleAPIClientMail string
	GoogleAPIPrivateKey string
	GooglePackageName   string
	GoogleProProductID  string
}

var Conf Config

var configLocHost = func() Config {
	return Config{
		Namespace:           "local-host",
		BaseURL:             "http://localhost:8080",
		GinDebug:            true,
		ServerIP:            "0.0.0.0",
		ServerPort:          "8080",
		DBFile:              ".run-data/db.sqlite3",
		RequestTimeout:      16 * time.Second,
		ReturnRawErrors:     true,
		DummyFirebase:       true,
		FirebaseTokenURI:    "",
		FirebaseProjectID:   "",
		FirebasePrivKeyID:   "",
		FirebaseClientMail:  "",
		FirebasePrivateKey:  "",
		DummyGoogleAPI:      true,
		GoogleAPITokenURI:   "",
		GoogleAPIPrivKeyID:  "",
		GoogleAPIClientMail: "",
		GoogleAPIPrivateKey: "",
		GooglePackageName:   "",
		GoogleProProductID:  "",
	}
}

var configLocDocker = func() Config {
	return Config{
		Namespace:           "local-docker",
		BaseURL:             "http://localhost:8080",
		GinDebug:            true,
		ServerIP:            "0.0.0.0",
		ServerPort:          "80",
		DBFile:              "/data/scn_docker.sqlite3",
		RequestTimeout:      16 * time.Second,
		ReturnRawErrors:     true,
		DummyFirebase:       true,
		FirebaseTokenURI:    "",
		FirebaseProjectID:   "",
		FirebasePrivKeyID:   "",
		FirebaseClientMail:  "",
		FirebasePrivateKey:  "",
		DummyGoogleAPI:      true,
		GoogleAPITokenURI:   "",
		GoogleAPIPrivKeyID:  "",
		GoogleAPIClientMail: "",
		GoogleAPIPrivateKey: "",
		GooglePackageName:   "",
		GoogleProProductID:  "",
	}
}

var configDev = func() Config {
	return Config{
		Namespace:           "develop",
		BaseURL:             confEnv("BASE_URL"),
		GinDebug:            true,
		ServerIP:            "0.0.0.0",
		ServerPort:          "80",
		DBFile:              "/data/scn.sqlite3",
		RequestTimeout:      16 * time.Second,
		ReturnRawErrors:     true,
		DummyFirebase:       false,
		FirebaseTokenURI:    "https://oauth2.googleapis.com/token",
		FirebaseProjectID:   confEnv("FB_PROJECTID"),
		FirebasePrivKeyID:   confEnv("FB_PRIVATEKEYID"),
		FirebaseClientMail:  confEnv("FB_CLIENTEMAIL"),
		FirebasePrivateKey:  confEnv("FB_PRIVATEKEY"),
		DummyGoogleAPI:      false,
		GoogleAPITokenURI:   "https://oauth2.googleapis.com/token",
		GoogleAPIPrivKeyID:  confEnv("GOOG_PRIVATEKEYID"),
		GoogleAPIClientMail: confEnv("GOOG_CLIENTEMAIL"),
		GoogleAPIPrivateKey: confEnv("GOOG_PRIVATEKEY"),
		GooglePackageName:   confEnv("GOOG_PACKAGENAME"),
		GoogleProProductID:  confEnv("GOOG_PROPRODUCTID"),
	}
}

var configStag = func() Config {
	return Config{
		Namespace:           "staging",
		BaseURL:             confEnv("BASE_URL"),
		GinDebug:            true,
		ServerIP:            "0.0.0.0",
		ServerPort:          "80",
		DBFile:              "/data/scn.sqlite3",
		RequestTimeout:      16 * time.Second,
		ReturnRawErrors:     true,
		DummyFirebase:       false,
		FirebaseTokenURI:    "https://oauth2.googleapis.com/token",
		FirebaseProjectID:   confEnv("FB_PROJECTID"),
		FirebasePrivKeyID:   confEnv("FB_PRIVATEKEYID"),
		FirebaseClientMail:  confEnv("FB_CLIENTEMAIL"),
		FirebasePrivateKey:  confEnv("FB_PRIVATEKEY"),
		DummyGoogleAPI:      false,
		GoogleAPITokenURI:   "https://oauth2.googleapis.com/token",
		GoogleAPIPrivKeyID:  confEnv("GOOG_PRIVATEKEYID"),
		GoogleAPIClientMail: confEnv("GOOG_CLIENTEMAIL"),
		GoogleAPIPrivateKey: confEnv("GOOG_PRIVATEKEY"),
		GooglePackageName:   confEnv("GOOG_PACKAGENAME"),
		GoogleProProductID:  confEnv("GOOG_PROPRODUCTID"),
	}
}

var configProd = func() Config {
	return Config{
		Namespace:           "production",
		BaseURL:             confEnv("BASE_URL"),
		GinDebug:            false,
		ServerIP:            "0.0.0.0",
		ServerPort:          "80",
		DBFile:              "/data/scn.sqlite3",
		RequestTimeout:      16 * time.Second,
		ReturnRawErrors:     false,
		DummyFirebase:       false,
		FirebaseTokenURI:    "https://oauth2.googleapis.com/token",
		FirebaseProjectID:   confEnv("FB_PROJECTID"),
		FirebasePrivKeyID:   confEnv("FB_PRIVATEKEYID"),
		FirebaseClientMail:  confEnv("FB_CLIENTEMAIL"),
		FirebasePrivateKey:  confEnv("FB_PRIVATEKEY"),
		DummyGoogleAPI:      false,
		GoogleAPITokenURI:   "https://oauth2.googleapis.com/token",
		GoogleAPIPrivKeyID:  confEnv("GOOG_PRIVATEKEYID"),
		GoogleAPIClientMail: confEnv("GOOG_CLIENTEMAIL"),
		GoogleAPIPrivateKey: confEnv("GOOG_PRIVATEKEY"),
		GooglePackageName:   confEnv("GOOG_PACKAGENAME"),
		GoogleProProductID:  confEnv("GOOG_PROPRODUCTID"),
	}
}

var allConfig = map[string]func() Config{
	"local-host":   configLocHost,
	"local-docker": configLocDocker,
	"develop":      configDev,
	"staging":      configStag,
	"production":   configProd,
}

func getConfig(ns string) (Config, bool) {
	if ns == "" {
		return configLocHost(), true
	}
	if c, ok := allConfig[ns]; ok {
		return c(), true
	}
	return Config{}, false
}

func confEnv(key string) string {
	if v, ok := os.LookupEnv(key); ok {
		return v
	} else {
		log.Fatal().Msg(fmt.Sprintf("Missing required environment variable '%s'", key))
		return ""
	}
}

func init() {
	ns := os.Getenv("CONF_NS")

	cfg, ok := getConfig(ns)
	if !ok {
		log.Fatal().Str("ns", ns).Msg("Unknown config-namespace")
	}

	Conf = cfg
}