package config

import (
	"kpt-grpc-demo/util/di"
	log "kpt-grpc-demo/util/logger"
	"os"
	"strings"
	"sync"
)

const AppName = "kpt-ops-grpc"

var (
	Module   = di.Provide(Options)
	options  *AppConfig
	appEnv   string
	initOnce sync.Once
)

// AppConfig store all configuration options
type AppConfig struct {
	AppName         string `yaml:"app_name"`
	AppEnv          string `yaml:"app_environment"`
	Debug           bool   `yaml:"debug" env:"APP_DEBUG"`
	HTTPServerAddr  string `yaml:"http_server_addr" env:"HTTP_SERVER_ADDR"`
	HTTPMetricsAddr string `yaml:"http_metrics_addr" env:"HTTP_METRICS_ADDR"`
	GRPCServerAddr  string `yaml:"grpc_server_addr" env:"GRPC_SERVER_ADDR"`
	GRPCMetricsAddr string `yaml:"grpc_metrics_addr" env:"GRPC_METRICS_ADDR"`

	// 数据库配置 额外加载文件部分 database.yaml
	StoreSetting StoreSetting `json:"storeSetting" yaml:"store"`

	// 第三方服务配置
	ThirdServiceSetting ThirdServiceSetting `yaml:"third_svc_setting"`
}

type ThirdServiceSetting struct {
	// ======================
	// gRPC Service
	// ======================
	ArabServiceLB   string `yaml:"arab_service_lb" env:"ARAB_SERVICE_LB"`
	BanglaServiceLB string `yaml:"bangla_service_lb" env:"BANGLA_SERVICE_LB"`
	UserUrumaLB     string `yaml:"user_uruma_lb" env:"USER_URUMA_LB"`
}

// StoreSetting 数据库配置
type StoreSetting struct {
	// 开启 SyDb SQL 记录
	ShowSQL         bool   `yaml:"show_sql" env:"STORE_SHOW_SQL"`
	KptEventDSNRW   string `yaml:"kpt_event_rw" env:"LINGO_COURSE_DSN_RW"`
	KptEventDSNMigr string `yaml:"kpt_event_migr" env:"LINGO_COURSE_DSN_MIGR"`
}

func Options() *AppConfig {
	return options
}

func init() {
	appEnv = strings.ToLower(os.Getenv("APP_ENVIRONMENT"))

	cfg := &AppConfig{}
	var err error
	initOnce.Do(func() {
		switch appEnv {
		default:
			err = Initialize("app.test.yaml", cfg)
			log.SetLevel(log.ErrorLevel)
		case "development":
			err = Initialize("app.develop.yaml", cfg)
		case "production":
			err = Initialize("app.production.yaml", cfg)
		}
		if err != nil {
			log.Fatalf("%+v", err)
		}
		options = cfg
	})
}