package redis

import (
	"context"
	"reflect"

	cfacade "github.com/cherry-game/cherry/facade"
	clog "github.com/cherry-game/cherry/logger"
	cprofile "github.com/cherry-game/cherry/profile"
	"github.com/go-redis/redis/v8"
)

type (
	Component struct {
		cfacade.Component
		clientList []IClient
	}
)

func New() *Component {
	return &Component{
		clientList: allList(),
	}
}

func NewClients(clientList ...IClient) *Component {
	return &Component{
		clientList: clientList,
	}
}

func (*Component) Name() string {
	return "redis_component"
}

func (p *Component) Init() {
	if len(p.clientList) < 1 {
		clog.Fatalf("[nodeID = %s] redis client list is empty.", p.App().NodeID())
		return
	}

	rdbIDList := p.App().Settings().Get("redis_id_list")
	if rdbIDList.LastError() != nil || rdbIDList.Size() < 1 {
		clog.Fatalf("[nodeID = %s] `redis_id_list` property not exists.", p.App().NodeID())
		return
	}

	// 从profile-xx.json 获取所有redis节点配置信息
	redisConfigList := cprofile.GetConfig("redis")
	if redisConfigList.LastError() != nil {
		clog.Fatal("`redis` property not exists.")
		return
	}

	// redis客户端实例 key:configID, value:*redis.Client
	clientMap := map[string]*client{}

	// 根据当前节点redis的配置构造 *redis.Client
	for _, configID := range rdbIDList.Keys() {
		if _, found := clientMap[configID]; found {
			continue
		}

		redisID := rdbIDList.Get(configID).ToString()
		if len(redisID) < 1 {
			clog.Fatalf("RedisID not found. [configID = %s]", configID)
			return
		}

		redisConfig := GetConfigWithRedisID(redisConfigList, redisID)
		if redisConfig == nil {
			clog.Fatalf("Redis config not found. [configID = %s, redisID = %s]", configID, redisID)
			return
		}

		// add
		clientMap[configID] = p.newClient(redisConfig)
		clog.Infof("New redis *client [configID = %s, redisID = %s]", configID, redisID)
	}

	// 根据自定义redis实例注入*client
	for _, instance := range p.clientList {
		client, found := clientMap[instance.ConfigID()]
		if !found {
			clog.Fatalf("Redis config not found. [configID = %s]", instance.ConfigID())
			return
		}

		instance.load(client)

		clog.Infof("Load [type = %v, configID = %s, redisID = %s]",
			reflect.TypeOf(instance).String(),
			instance.ConfigID(),
			instance.RedisID(),
		)
	}

}

func (*Component) OnStop() {
}

func (p *Component) OnAfterInit() {
}

func GetConfigWithRedisID(allList cfacade.ProfileJSON, redisID string) cfacade.ProfileJSON {
	for i := 0; i < allList.Size(); i++ {
		item := allList.GetConfig(i)
		if item.Get("redis_id").ToString() == redisID {
			return item
		}
	}
	return nil
}

func NewClientOption(item cfacade.ProfileJSON) (string, *redis.Options) {
	redisID := item.GetString("redis_id")
	address := item.GetString("address")
	password := item.GetString("password")
	db := item.GetInt("db")
	poolSize := item.GetInt("pool_size", 32)

	options := &redis.Options{
		Addr:     address,
		Password: password,
		DB:       db,
		PoolSize: poolSize,
		OnConnect: func(ctx context.Context, cn *redis.Conn) error {
			clog.Infof("[redisID = %s] connected! [address = %s]", redisID, address)
			return nil
		},
	}

	return redisID, options
}

func (p *Component) newClient(item cfacade.ProfileJSON) *client {
	redisID, options := NewClientOption(item)
	return newClient(redisID, options)
}