package cache

import (
	"errors"

	. "code.hoteas.com/golang/hotime/common"
)

// HoTimeCache 可配置memory，db，redis，默认启用memory，默认优先级为memory>redis>db,memory与数据库缓存设置项一致，
// 缓存数据填充会自动反方向反哺，加入memory缓存过期将自动从redis更新，但memory永远不会更新redis，如果是集群建议不要开启memory，配置即启用
type HoTimeCache struct {
	*Error
	dbCache     *CacheDb
	redisCache  *CacheRedis
	memoryCache *CacheMemory
	Config      Map
}

func (that *HoTimeCache) Session(key string, data ...interface{}) *Obj {
	var reData *Obj
	if len(data) == 0 {
		//内存缓存有
		if that.memoryCache != nil && that.memoryCache.SessionSet {
			reData = that.memoryCache.Cache(key, data...)
			if reData.Data != nil {
				return reData
			}
		}

		//redis缓存有
		if that.redisCache != nil && that.redisCache.SessionSet {
			reData = that.redisCache.Cache(key, data...)
			if reData.Data != nil {
				if that.memoryCache != nil && that.memoryCache.SessionSet {
					that.memoryCache.Cache(key, reData.Data)
				}
				return reData
			}
		}

		//db缓存有
		if that.dbCache != nil && that.dbCache.SessionSet {
			reData = that.dbCache.Cache(key, data...)
			if reData.Data != nil {
				if that.memoryCache != nil && that.memoryCache.SessionSet {
					that.memoryCache.Cache(key, reData.Data)
				}
				if that.redisCache != nil && that.redisCache.SessionSet {
					that.redisCache.Cache(key, reData.Data)
				}

				return reData
			}
		}
		return reData
	}

	//设置缓存
	//设置内存缓存
	if that.memoryCache != nil && that.memoryCache.SessionSet {
		reData = that.memoryCache.Cache(key, data...)
	}
	//redis缓存有
	if that.redisCache != nil && that.redisCache.SessionSet {
		reData = that.redisCache.Cache(key, data...)
	}
	//redis缓存有
	if that.dbCache != nil && that.dbCache.SessionSet {
		reData = that.dbCache.Cache(key, data...)
	}
	return reData

}
func (that *HoTimeCache) Db(key string, data ...interface{}) *Obj {
	var reData *Obj
	if len(data) == 0 {
		//内存缓存有
		if that.memoryCache != nil && that.memoryCache.DbSet {
			reData = that.memoryCache.Cache(key, data...)
			if reData.Data != nil {
				return reData
			}
		}

		//redis缓存有
		if that.redisCache != nil && that.redisCache.DbSet {
			reData = that.redisCache.Cache(key, data...)
			if reData.Data != nil {
				if that.memoryCache != nil && that.memoryCache.DbSet {
					that.memoryCache.Cache(key, reData.Data)
				}
				return reData
			}
		}

		//db缓存有
		if that.dbCache != nil && that.dbCache.DbSet {
			reData = that.dbCache.Cache(key, data...)
			if reData.Data != nil {
				if that.memoryCache != nil && that.memoryCache.DbSet {
					that.memoryCache.Cache(key, reData.Data)
				}

				if that.redisCache != nil && that.redisCache.DbSet {
					that.redisCache.Cache(key, reData.Data)
				}

				return reData
			}
		}
		return reData
	}

	//设置缓存
	//设置内存缓存
	if that.memoryCache != nil && that.memoryCache.DbSet {
		reData = that.memoryCache.Cache(key, data...)
	}
	//redis缓存有
	if that.redisCache != nil && that.redisCache.DbSet {
		reData = that.redisCache.Cache(key, data...)
	}
	//db缓存有
	if that.dbCache != nil && that.dbCache.DbSet {
		reData = that.dbCache.Cache(key, data...)
	}
	return reData
}

func (that *HoTimeCache) Cache(key string, data ...interface{}) *Obj {
	var reData *Obj
	if len(data) == 0 {
		//内存缓存有
		if that.memoryCache != nil {
			reData = that.memoryCache.Cache(key, data...)
			if reData != nil && reData.Data != nil {
				return reData
			}
		}

		//redis缓存有
		if that.redisCache != nil {
			reData = that.redisCache.Cache(key, data...)
			if reData != nil && reData.Data != nil {
				if that.memoryCache != nil {
					that.memoryCache.Cache(key, reData.Data)
				}
				return reData
			}
		}

		//db缓存有
		if that.dbCache != nil {
			reData = that.dbCache.Cache(key, data...)
			if reData != nil && reData.Data != nil {
				if that.memoryCache != nil {
					that.memoryCache.Cache(key, reData.Data)
				}
				if that.redisCache != nil {
					that.redisCache.Cache(key, reData.Data)
				}
				return reData
			}
		}
		return reData
	}

	//设置缓存
	//设置内存缓存
	if that.memoryCache != nil {
		reData = that.memoryCache.Cache(key, data...)
	}
	//redis缓存有
	if that.redisCache != nil {
		reData = that.redisCache.Cache(key, data...)
	}
	//db缓存有
	if that.dbCache != nil {
		reData = that.dbCache.Cache(key, data...)
	}
	return reData
}

// SessionsGet 批量获取 Session 缓存
// 返回 Map，key 为缓存键，value 为缓存值
// 优先级：memory > redis > db，低优先级数据会反哺到高优先级缓存
func (that *HoTimeCache) SessionsGet(keys []string) Map {
	if len(keys) == 0 {
		return Map{}
	}

	result := make(Map, len(keys))
	missingKeys := keys

	// 从 memory 获取
	if that.memoryCache != nil && that.memoryCache.SessionSet {
		memResult := that.memoryCache.CachesGet(keys)
		for k, v := range memResult {
			result[k] = v
		}
		// 计算未命中的 keys
		missingKeys = make([]string, 0)
		for _, k := range keys {
			if _, exists := result[k]; !exists {
				missingKeys = append(missingKeys, k)
			}
		}
	}

	// 从 redis 获取未命中的
	if len(missingKeys) > 0 && that.redisCache != nil && that.redisCache.SessionSet {
		redisResult := that.redisCache.CachesGet(missingKeys)
		// 反哺到 memory
		if that.memoryCache != nil && that.memoryCache.SessionSet && len(redisResult) > 0 {
			that.memoryCache.CachesSet(redisResult)
		}
		for k, v := range redisResult {
			result[k] = v
		}
		// 更新未命中的 keys
		newMissing := make([]string, 0)
		for _, k := range missingKeys {
			if _, exists := result[k]; !exists {
				newMissing = append(newMissing, k)
			}
		}
		missingKeys = newMissing
	}

	// 从 db 获取未命中的
	if len(missingKeys) > 0 && that.dbCache != nil && that.dbCache.SessionSet {
		dbResult := that.dbCache.CachesGet(missingKeys)
		// 反哺到 memory 和 redis
		if len(dbResult) > 0 {
			if that.memoryCache != nil && that.memoryCache.SessionSet {
				that.memoryCache.CachesSet(dbResult)
			}
			if that.redisCache != nil && that.redisCache.SessionSet {
				that.redisCache.CachesSet(dbResult)
			}
		}
		for k, v := range dbResult {
			result[k] = v
		}
	}

	return result
}

// SessionsSet 批量设置 Session 缓存
// data: Map，key 为缓存键，value 为缓存值
func (that *HoTimeCache) SessionsSet(data Map) {
	if len(data) == 0 {
		return
	}

	if that.memoryCache != nil && that.memoryCache.SessionSet {
		that.memoryCache.CachesSet(data)
	}
	if that.redisCache != nil && that.redisCache.SessionSet {
		that.redisCache.CachesSet(data)
	}
	if that.dbCache != nil && that.dbCache.SessionSet {
		that.dbCache.CachesSet(data)
	}
}

// SessionsDelete 批量删除 Session 缓存
func (that *HoTimeCache) SessionsDelete(keys []string) {
	if len(keys) == 0 {
		return
	}

	if that.memoryCache != nil && that.memoryCache.SessionSet {
		that.memoryCache.CachesDelete(keys)
	}
	if that.redisCache != nil && that.redisCache.SessionSet {
		that.redisCache.CachesDelete(keys)
	}
	if that.dbCache != nil && that.dbCache.SessionSet {
		that.dbCache.CachesDelete(keys)
	}
}

// CachesGet 批量获取普通缓存
// 返回 Map，key 为缓存键，value 为缓存值
// 优先级：memory > redis > db，低优先级数据会反哺到高优先级缓存
func (that *HoTimeCache) CachesGet(keys []string) Map {
	if len(keys) == 0 {
		return Map{}
	}

	result := make(Map, len(keys))
	missingKeys := keys

	// 从 memory 获取
	if that.memoryCache != nil {
		memResult := that.memoryCache.CachesGet(keys)
		for k, v := range memResult {
			result[k] = v
		}
		// 计算未命中的 keys
		missingKeys = make([]string, 0)
		for _, k := range keys {
			if _, exists := result[k]; !exists {
				missingKeys = append(missingKeys, k)
			}
		}
	}

	// 从 redis 获取未命中的
	if len(missingKeys) > 0 && that.redisCache != nil {
		redisResult := that.redisCache.CachesGet(missingKeys)
		// 反哺到 memory
		if that.memoryCache != nil && len(redisResult) > 0 {
			that.memoryCache.CachesSet(redisResult)
		}
		for k, v := range redisResult {
			result[k] = v
		}
		// 更新未命中的 keys
		newMissing := make([]string, 0)
		for _, k := range missingKeys {
			if _, exists := result[k]; !exists {
				newMissing = append(newMissing, k)
			}
		}
		missingKeys = newMissing
	}

	// 从 db 获取未命中的
	if len(missingKeys) > 0 && that.dbCache != nil {
		dbResult := that.dbCache.CachesGet(missingKeys)
		// 反哺到 memory 和 redis
		if len(dbResult) > 0 {
			if that.memoryCache != nil {
				that.memoryCache.CachesSet(dbResult)
			}
			if that.redisCache != nil {
				that.redisCache.CachesSet(dbResult)
			}
		}
		for k, v := range dbResult {
			result[k] = v
		}
	}

	return result
}

// CachesSet 批量设置普通缓存
// data: Map，key 为缓存键，value 为缓存值
func (that *HoTimeCache) CachesSet(data Map) {
	if len(data) == 0 {
		return
	}

	if that.memoryCache != nil {
		that.memoryCache.CachesSet(data)
	}
	if that.redisCache != nil {
		that.redisCache.CachesSet(data)
	}
	if that.dbCache != nil {
		that.dbCache.CachesSet(data)
	}
}

// CachesDelete 批量删除普通缓存
func (that *HoTimeCache) CachesDelete(keys []string) {
	if len(keys) == 0 {
		return
	}

	if that.memoryCache != nil {
		that.memoryCache.CachesDelete(keys)
	}
	if that.redisCache != nil {
		that.redisCache.CachesDelete(keys)
	}
	if that.dbCache != nil {
		that.dbCache.CachesDelete(keys)
	}
}

func (that *HoTimeCache) Init(config Map, hotimeDb HoTimeDBInterface, err ...*Error) {
	//防止空数据问题
	if config == nil {
		config = Map{}
	}
	if err[0] != nil {
		that.Error = err[0]
	}
	that.Config = config
	//memory配置初始化
	memory := that.Config.GetMap("memory")
	if memory == nil {
		memory = Map{
			"db":      true,
			"session": true,
			"sort":    0,
			"timeout": 60 * 60 * 2,
		}

	}
	if memory.Get("db") == nil {
		memory["db"] = true
	}

	if memory.Get("session") == nil {
		memory["session"] = true
	}

	if memory.Get("timeout") == nil {
		memory["timeout"] = 60 * 60 * 2
	}
	that.Config["memory"] = memory
	that.memoryCache = &CacheMemory{TimeOut: memory.GetCeilInt64("timeout"),
		DbSet: memory.GetBool("db"), SessionSet: memory.GetBool("session")}
	if err[0] != nil {
		that.memoryCache.SetError(err[0])
	}

	//db配置初始化
	redis := that.Config.GetMap("redis")
	if redis != nil {
		if redis.GetString("host") == "" || redis.GetString("port") == "" {
			if err[0] != nil {
				err[0].SetError(errors.New("请检查redis配置host和port配置"))
			}
			return
		}
		if redis.Get("db") == nil {
			redis["db"] = true
		}

		if redis.Get("session") == nil {
			redis["session"] = true
		}

		if redis.Get("timeout") == nil {
			redis["timeout"] = 60 * 60 * 24 * 15
		}
		that.Config["redis"] = redis
		that.redisCache = &CacheRedis{TimeOut: redis.GetCeilInt64("timeout"),
			DbSet: redis.GetBool("db"), SessionSet: redis.GetBool("session"), Host: redis.GetString("host"),
			Pwd: redis.GetString("password"), Port: redis.GetCeilInt64("port")}

		if err[0] != nil {
			that.redisCache.SetError(err[0])
		}
	}

	//db配置初始化
	db := that.Config.GetMap("db")
	if db != nil {

		if db.Get("db") == nil {
			db["db"] = false
		}

		if db.Get("session") == nil {
			db["session"] = true
		}
		if db.Get("timeout") == nil {
			db["timeout"] = 60 * 60 * 24 * 30
		}
		// mode 默认为 "compatible"（兼容模式，便于老系统平滑升级）
		if db.Get("mode") == nil {
			db["mode"] = CacheModeCompatible
		}
		that.Config["db"] = db

		that.dbCache = &CacheDb{
			TimeOut:    db.GetCeilInt64("timeout"),
			DbSet:      db.GetBool("db"),
			SessionSet: db.GetBool("session"),
			HistorySet: db.GetBool("history"),
			Mode:       db.GetString("mode"),
			Db:         hotimeDb,
		}

		if err[0] != nil {
			that.dbCache.SetError(err[0])
		}
	}

}

func (that *HoTimeCache) DisableDbCache() {
	that.dbCache = nil
	that.redisCache = nil
}