package models

import (
	"encoding/json"
	"errors"
	"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs"
	_ "github.com/go-sql-driver/mysql"
	"github.com/iwind/TeaGo/Tea"
	"github.com/iwind/TeaGo/dbs"
	"github.com/iwind/TeaGo/rands"
	"github.com/iwind/TeaGo/types"
)

const (
	ServerStateEnabled  = 1 // 已启用
	ServerStateDisabled = 0 // 已禁用
)

type ServerDAO dbs.DAO

func NewServerDAO() *ServerDAO {
	return dbs.NewDAO(&ServerDAO{
		DAOObject: dbs.DAOObject{
			DB:     Tea.Env,
			Table:  "edgeServers",
			Model:  new(Server),
			PkName: "id",
		},
	}).(*ServerDAO)
}

var SharedServerDAO = NewServerDAO()

// 启用条目
func (this *ServerDAO) EnableServer(id uint32) (rowsAffected int64, err error) {
	return this.Query().
		Pk(id).
		Set("state", ServerStateEnabled).
		Update()
}

// 禁用条目
func (this *ServerDAO) DisableServer(id int64) (err error) {
	_, err = this.Query().
		Pk(id).
		Set("state", ServerStateDisabled).
		Update()
	return
}

// 查找启用中的条目
func (this *ServerDAO) FindEnabledServer(id int64) (*Server, error) {
	result, err := this.Query().
		Pk(id).
		Attr("state", ServerStateEnabled).
		Find()
	if result == nil {
		return nil, err
	}
	return result.(*Server), err
}

// 查找服务类型
func (this *ServerDAO) FindEnabledServerType(serverId int64) (string, error) {
	return this.Query().
		Pk(serverId).
		Result("type").
		FindStringCol("")
}

// 创建服务
func (this *ServerDAO) CreateServer(adminId int64, userId int64, serverType serverconfigs.ServerType, name string, description string, serverNamesJSON string, httpJSON string, httpsJSON string, tcpJSON string, tlsJSON string, unixJSON string, udpJSON string, webId int64, reverseProxyId int64, clusterId int64, includeNodesJSON string, excludeNodesJSON string) (serverId int64, err error) {
	uniqueId, err := this.genUniqueId()
	if err != nil {
		return 0, err
	}

	op := NewServerOperator()
	op.UniqueId = uniqueId
	op.UserId = userId
	op.AdminId = adminId
	op.Name = name
	op.Type = serverType
	op.Description = description

	if len(serverNamesJSON) > 0 {
		op.ServerNames = serverNamesJSON
	}
	if len(httpJSON) > 0 {
		op.Http = httpJSON
	}
	if len(httpsJSON) > 0 {
		op.Https = httpsJSON
	}
	if len(tcpJSON) > 0 {
		op.Tcp = tcpJSON
	}
	if len(tlsJSON) > 0 {
		op.Tls = tlsJSON
	}
	if len(unixJSON) > 0 {
		op.Unix = unixJSON
	}
	if len(udpJSON) > 0 {
		op.Udp = udpJSON
	}
	op.WebId = webId
	op.ReverseProxyId = reverseProxyId

	op.ClusterId = clusterId
	if len(includeNodesJSON) > 0 {
		op.IncludeNodes = includeNodesJSON
	}
	if len(excludeNodesJSON) > 0 {
		op.ExcludeNodes = excludeNodesJSON
	}
	op.GroupIds = "[]"
	op.Version = 1
	op.IsOn = 1
	op.State = ServerStateEnabled
	_, err = this.Save(op)

	if err != nil {
		return 0, err
	}

	serverId = types.Int64(op.Id)
	err = this.RenewServerConfig(serverId)
	return serverId, err
}

// 修改服务基本信息
func (this *ServerDAO) UpdateServerBasic(serverId int64, name string, description string, clusterId int64) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	op := NewServerOperator()
	op.Id = serverId
	op.Name = name
	op.Description = description
	op.ClusterId = clusterId
	op.Version = dbs.SQL("version=version+1")
	_, err := this.Save(op)
	return err
}

// 修改服务配置
func (this *ServerDAO) UpdateServerConfig(serverId int64, config []byte) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	if len(config) == 0 {
		config = []byte("null")
	}
	_, err := this.Query().
		Pk(serverId).
		Set("config", string(config)).
		Set("version", dbs.SQL("version+1")).
		Update()
	return err
}

// 修改HTTP配置
func (this *ServerDAO) UpdateServerHTTP(serverId int64, config []byte) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	if len(config) == 0 {
		config = []byte("null")
	}
	_, err := this.Query().
		Pk(serverId).
		Set("http", string(config)).
		Update()
	if err != nil {
		return err
	}
	return this.RenewServerConfig(serverId)
}

// 修改HTTPS配置
func (this *ServerDAO) UpdateServerHTTPS(serverId int64, config []byte) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	if len(config) == 0 {
		config = []byte("null")
	}
	_, err := this.Query().
		Pk(serverId).
		Set("https", string(config)).
		Update()
	if err != nil {
		return err
	}
	return this.RenewServerConfig(serverId)
}

// 修改TCP配置
func (this *ServerDAO) UpdateServerTCP(serverId int64, config []byte) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	if len(config) == 0 {
		config = []byte("null")
	}
	_, err := this.Query().
		Pk(serverId).
		Set("tcp", string(config)).
		Update()
	if err != nil {
		return err
	}
	return this.RenewServerConfig(serverId)
}

// 修改TLS配置
func (this *ServerDAO) UpdateServerTLS(serverId int64, config []byte) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	if len(config) == 0 {
		config = []byte("null")
	}
	_, err := this.Query().
		Pk(serverId).
		Set("tls", string(config)).
		Update()
	if err != nil {
		return err
	}
	return this.RenewServerConfig(serverId)
}

// 修改Unix配置
func (this *ServerDAO) UpdateServerUnix(serverId int64, config []byte) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	if len(config) == 0 {
		config = []byte("null")
	}
	_, err := this.Query().
		Pk(serverId).
		Set("unix", string(config)).
		Update()
	if err != nil {
		return err
	}
	return this.RenewServerConfig(serverId)
}

// 修改UDP配置
func (this *ServerDAO) UpdateServerUDP(serverId int64, config []byte) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	if len(config) == 0 {
		config = []byte("null")
	}
	_, err := this.Query().
		Pk(serverId).
		Set("udp", string(config)).
		Update()
	if err != nil {
		return err
	}
	return this.RenewServerConfig(serverId)
}

// 修改Web配置
func (this *ServerDAO) UpdateServerWeb(serverId int64, webId int64) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	_, err := this.Query().
		Pk(serverId).
		Set("webId", webId).
		Update()
	if err != nil {
		return err
	}
	return this.RenewServerConfig(serverId)
}

// 初始化Web配置
func (this *ServerDAO) InitServerWeb(serverId int64) (int64, error) {
	if serverId <= 0 {
		return 0, errors.New("serverId should not be smaller than 0")
	}

	webId, err := SharedHTTPWebDAO.CreateWeb("")
	if err != nil {
		return 0, err
	}

	_, err = this.Query().
		Pk(serverId).
		Set("webId", webId).
		Update()
	if err != nil {
		return 0, err
	}

	return webId, nil
}

// 修改ServerNames配置
func (this *ServerDAO) UpdateServerNames(serverId int64, config []byte) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	if len(config) == 0 {
		config = []byte("null")
	}
	_, err := this.Query().
		Pk(serverId).
		Set("serverNames", string(config)).
		Update()
	if err != nil {
		return err
	}
	return this.RenewServerConfig(serverId)
}

// 修改反向代理配置
func (this *ServerDAO) UpdateServerReverseProxy(serverId int64, reverseProxyId int64) error {
	if serverId <= 0 {
		return errors.New("serverId should not be smaller than 0")
	}
	_, err := this.Query().
		Pk(serverId).
		Set("reverseProxyId", reverseProxyId).
		Update()
	if err != nil {
		return err
	}
	return this.RenewServerConfig(serverId)
}

// 计算所有可用服务数量
func (this *ServerDAO) CountAllEnabledServers() (int64, error) {
	return this.Query().
		State(ServerStateEnabled).
		Count()
}

// 列出单页的服务
func (this *ServerDAO) ListEnabledServers(offset int64, size int64) (result []*Server, err error) {
	_, err = this.Query().
		State(ServerStateEnabled).
		Offset(offset).
		Limit(size).
		DescPk().
		Slice(&result).
		FindAll()
	return
}

// 获取节点中的所有服务
func (this *ServerDAO) FindAllEnabledServersWithNode(nodeId int64) (result []*Server, err error) {
	// 节点所在集群
	clusterId, err := SharedNodeDAO.FindNodeClusterId(nodeId)
	if err != nil {
		return nil, err
	}
	if clusterId <= 0 {
		return nil, nil
	}

	_, err = this.Query().
		Attr("clusterId", clusterId).
		State(ServerStateEnabled).
		AscPk().
		Slice(&result).
		FindAll()
	return
}

// 构造服务的Config
func (this *ServerDAO) ComposeServerConfig(serverId int64) (*serverconfigs.ServerConfig, error) {
	server, err := this.FindEnabledServer(serverId)
	if err != nil {
		return nil, err
	}
	if server == nil {
		return nil, errors.New("server not found")
	}

	config := &serverconfigs.ServerConfig{}
	config.Id = serverId
	config.Type = server.Type
	config.IsOn = server.IsOn == 1
	config.Name = server.Name
	config.Description = server.Description

	// Components
	// TODO

	// Filters
	// TODO

	// ServerNames
	if len(server.ServerNames) > 0 && server.ServerNames != "null" {
		serverNames := []*serverconfigs.ServerNameConfig{}
		err = json.Unmarshal([]byte(server.ServerNames), &serverNames)
		if err != nil {
			return nil, err
		}
		config.ServerNames = serverNames
	}

	// HTTP
	if len(server.Http) > 0 && server.Http != "null" {
		httpConfig := &serverconfigs.HTTPProtocolConfig{}
		err = json.Unmarshal([]byte(server.Http), httpConfig)
		if err != nil {
			return nil, err
		}
		config.HTTP = httpConfig
	}

	// HTTPS
	if len(server.Https) > 0 && server.Https != "null" {
		httpsConfig := &serverconfigs.HTTPSProtocolConfig{}
		err = json.Unmarshal([]byte(server.Https), httpsConfig)
		if err != nil {
			return nil, err
		}
		config.HTTPS = httpsConfig
	}

	// TCP
	if len(server.Tcp) > 0 && server.Tcp != "null" {
		tcpConfig := &serverconfigs.TCPProtocolConfig{}
		err = json.Unmarshal([]byte(server.Tcp), tcpConfig)
		if err != nil {
			return nil, err
		}
		config.TCP = tcpConfig
	}

	// TLS
	if len(server.Tls) > 0 && server.Tls != "null" {
		tlsConfig := &serverconfigs.TLSProtocolConfig{}
		err = json.Unmarshal([]byte(server.Tls), tlsConfig)
		if err != nil {
			return nil, err
		}
		config.TLS = tlsConfig
	}

	// Unix
	if len(server.Unix) > 0 && server.Unix != "null" {
		unixConfig := &serverconfigs.UnixProtocolConfig{}
		err = json.Unmarshal([]byte(server.Unix), unixConfig)
		if err != nil {
			return nil, err
		}
		config.Unix = unixConfig
	}

	// UDP
	if len(server.Udp) > 0 && server.Udp != "null" {
		udpConfig := &serverconfigs.UDPProtocolConfig{}
		err = json.Unmarshal([]byte(server.Udp), udpConfig)
		if err != nil {
			return nil, err
		}
		config.UDP = udpConfig
	}

	// Web
	if server.WebId > 0 {
		webConfig, err := SharedHTTPWebDAO.ComposeWebConfig(int64(server.WebId))
		if err != nil {
			return nil, err
		}
		if webConfig != nil {
			config.Web = webConfig
		}
	}

	// ReverseProxy
	if server.ReverseProxyId > 0 {
		reverseProxyConfig, err := SharedReverseProxyDAO.ComposeReverseProxyConfig(int64(server.ReverseProxyId))
		if err != nil {
			return nil, err
		}
		if reverseProxyConfig != nil {
			config.ReverseProxy = reverseProxyConfig
		}
	}

	return config, nil
}

// 更新服务的Config配置
func (this *ServerDAO) RenewServerConfig(serverId int64) error {
	serverConfig, err := this.ComposeServerConfig(serverId)
	if err != nil {
		return err
	}
	data, err := serverConfig.AsJSON()
	if err != nil {
		return err
	}
	return this.UpdateServerConfig(serverId, data)
}

// 根据条件获取反向代理配置
func (this *ServerDAO) FindReverseProxyConfig(serverId int64) (*serverconfigs.ReverseProxyConfig, error) {
	reverseProxy, err := this.Query().
		Pk(serverId).
		Result("reverseProxy").
		FindStringCol("")
	if err != nil {
		return nil, err
	}
	if len(reverseProxy) == 0 || reverseProxy == "null" {
		return nil, nil
	}
	config := &serverconfigs.ReverseProxyConfig{}
	err = json.Unmarshal([]byte(reverseProxy), config)
	return config, err
}

// 查找需要更新的Server
func (this *ServerDAO) FindUpdatingServerIds() (serverIds []int64, err error) {
	ones, err := this.Query().
		State(ServerStateEnabled).
		Attr("isUpdating", true).
		ResultPk().
		FindAll()
	if err != nil {
		return nil, err
	}
	for _, one := range ones {
		serverIds = append(serverIds, int64(one.(*Server).Id))
	}
	return
}

// 修改服务是否需要更新
func (this *ServerDAO) UpdateServerIsUpdating(serverId int64, isUpdating bool) error {
	_, err := this.Query().
		Pk(serverId).
		Set("isUpdating", isUpdating).
		Update()
	return err
}

// 查找WebId
func (this *ServerDAO) FindServerWebId(serverId int64) (int64, error) {
	webId, err := this.Query().
		Pk(serverId).
		Result("webId").
		FindIntCol(0)
	if err != nil {
		return 0, err
	}
	return int64(webId), nil
}

// 更新所有Web相关的处于更新状态
func (this *ServerDAO) UpdateServerIsUpdatingWithWebId(webId int64) error {
	_, err := this.Query().
		Attr("webId", webId).
		Set("isUpdating", true).
		Update()
	return err
}

// 生成唯一ID
func (this *ServerDAO) genUniqueId() (string, error) {
	for {
		uniqueId := rands.HexString(32)
		ok, err := this.Query().
			Attr("uniqueId", uniqueId).
			Exist()
		if err != nil {
			return "", err
		}
		if ok {
			continue
		}
		return uniqueId, nil
	}
}