package core

import (
	"context"
	"io"
	"net/http"

	"github.com/go-redis/redis/v8"
	"repositories.action2quare.com/ayo/gocommon"
	"repositories.action2quare.com/ayo/gocommon/flagx"
	"repositories.action2quare.com/ayo/gocommon/logger"
	"repositories.action2quare.com/ayo/gocommon/session"
	"repositories.action2quare.com/ayo/gocommon/wshandler"
)

var devflag = flagx.Bool("dev", false, "")

type SocialConfig struct {
	session.SessionConfig `json:",inline"`

	MaingateApiToken string `json:"maingate_api_token"`
	RedisURL         string `json:"social_redis_url"`
	MongoURL         string `json:"social_storage_url"`
	FriendsMax       int    `json:"social_friends_max"`
}

var config SocialConfig

type Social struct {
	wsh           *wshandler.WebsocketHandler
	mongoClient   gocommon.MongoClient
	redison       *gocommon.RedisonHandler
	httpApiBorker gocommon.HttpApiBroker
}

// New :
func New(ctx context.Context, wsh *wshandler.WebsocketHandler, inconfig *SocialConfig) (*Social, error) {
	if inconfig == nil {
		var loaded SocialConfig
		if err := gocommon.LoadConfig(&loaded); err != nil {
			return nil, err
		}
		inconfig = &loaded
	}

	config = *inconfig
	opt, err := redis.ParseURL(config.RedisURL)
	if err != nil {
		return nil, logger.ErrorWithCallStack(err)
	}

	mc, err := gocommon.NewMongoClient(ctx, config.MongoURL)
	if err != nil {
		return nil, logger.ErrorWithCallStack(err)
	}

	so := &Social{
		wsh:         wsh,
		redison:     gocommon.NewRedisonHandler(ctx, redis.NewClient(opt)),
		mongoClient: mc,
	}

	if err := so.prepare(ctx); err != nil {
		logger.Println("social prepare() failed :", err)
		return nil, logger.ErrorWithCallStack(err)
	}

	return so, nil
}

func (so *Social) Cleanup() {
	so.mongoClient.Close()
}

func (so *Social) prepare(ctx context.Context) error {
	redisClient, err := gocommon.NewRedisClient(config.RedisURL)
	if err != nil {
		return logger.ErrorWithCallStack(err)
	}

	so.redison = gocommon.NewRedisonHandler(redisClient.Context(), redisClient)

	connections := makeConnections(so.redison, so.wsh)
	so.wsh.AddHandler(wshandler.MakeWebsocketApiHandler(connections, "social"))
	so.httpApiBorker.AddHandler(gocommon.MakeHttpApiHandler(connections, "social"))

	blocks, err := makeBlocklist(ctx, so, connections)
	if err != nil {
		return logger.ErrorWithCallStack(err)
	}
	so.wsh.AddHandler(wshandler.MakeWebsocketApiHandler(blocks, "social"))
	so.httpApiBorker.AddHandler(gocommon.MakeHttpApiHandler(blocks, "social"))

	friends, err := makeFriends(ctx, so, connections)
	if err != nil {
		return logger.ErrorWithCallStack(err)
	}
	so.wsh.AddHandler(wshandler.MakeWebsocketApiHandler(friends, "social"))
	so.httpApiBorker.AddHandler(gocommon.MakeHttpApiHandler(friends, "social"))

	invitation, err := makeInvitation(ctx, so, friends)
	if err != nil {
		return logger.ErrorWithCallStack(err)
	}
	so.wsh.AddHandler(wshandler.MakeWebsocketApiHandler(invitation, "social"))
	so.httpApiBorker.AddHandler(gocommon.MakeHttpApiHandler(invitation, "social"))

	return nil
}

func (so *Social) RegisterHandlers(ctx context.Context, serveMux *http.ServeMux, prefix string) error {
	so.wsh.AddHandler(wshandler.MakeWebsocketApiHandler(so, "social"))
	pattern := gocommon.MakeHttpHandlerPattern(prefix, "api")
	serveMux.HandleFunc(pattern, so.api)

	return nil
}

func (so *Social) api(w http.ResponseWriter, r *http.Request) {
	defer func() {
		s := recover()
		if s != nil {
			logger.Error(s)
		}
		io.Copy(io.Discard, r.Body)
		r.Body.Close()
	}()

	// 서버에서 오는 요청만 처리
	apitoken := r.Header.Get("MG-X-API-TOKEN")
	if apitoken != config.MaingateApiToken {
		// 서버가 보내는 쿼리만 허용
		logger.Println("MG-X-API-TOKEN is missing")
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	so.httpApiBorker.Call(w, r)
}