package toc

import (
	"context"
	"net/http"

	"github.com/google/uuid"

	"github.com/mk6i/open-oscar-server/config"
	"github.com/mk6i/open-oscar-server/state"
	"github.com/mk6i/open-oscar-server/wire"
)

type BuddyService interface {
	AddBuddies(ctx context.Context, instance *state.SessionInstance, inBody wire.SNAC_0x03_0x04_BuddyAddBuddies) error
	BroadcastBuddyArrived(ctx context.Context, screenName state.IdentScreenName, userInfo wire.TLVUserInfo) error
	BroadcastBuddyDeparted(ctx context.Context, instance *state.SessionInstance) error
	DelBuddies(ctx context.Context, instance *state.SessionInstance, inBody wire.SNAC_0x03_0x05_BuddyDelBuddies) error
	RightsQuery(ctx context.Context, inFrame wire.SNACFrame) wire.SNACMessage
}

type ChatService interface {
	ChannelMsgToHost(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x0E_0x05_ChatChannelMsgToHost) (*wire.SNACMessage, error)
}

type ChatNavService interface {
	CreateRoom(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x0E_0x02_ChatRoomInfoUpdate) (wire.SNACMessage, error)
	ExchangeInfo(ctx context.Context, inFrame wire.SNACFrame, inBody wire.SNAC_0x0D_0x03_ChatNavRequestExchangeInfo) (wire.SNACMessage, error)
	RequestChatRights(ctx context.Context, inFrame wire.SNACFrame) wire.SNACMessage
	RequestRoomInfo(ctx context.Context, inFrame wire.SNACFrame, inBody wire.SNAC_0x0D_0x04_ChatNavRequestRoomInfo) (wire.SNACMessage, error)
}

type ICBMService interface {
	ChannelMsgToHost(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x04_0x06_ICBMChannelMsgToHost) (*wire.SNACMessage, error)
	ClientEvent(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x04_0x14_ICBMClientEvent) error
	EvilRequest(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x04_0x08_ICBMEvilRequest) (wire.SNACMessage, error)
	ParameterQuery(ctx context.Context, inFrame wire.SNACFrame) wire.SNACMessage
	ClientErr(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x04_0x0B_ICBMClientErr) error
}

type OServiceService interface {
	ClientOnline(ctx context.Context, service uint16, inBody wire.SNAC_0x01_0x02_OServiceClientOnline, instance *state.SessionInstance) error
	IdleNotification(ctx context.Context, instance *state.SessionInstance, inBody wire.SNAC_0x01_0x11_OServiceIdleNotification) error
	ServiceRequest(ctx context.Context, service uint16, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x01_0x04_OServiceServiceRequest, listener config.Listener) (wire.SNACMessage, error)
}

type AuthService interface {
	BUCPChallenge(ctx context.Context, inBody wire.SNAC_0x17_0x06_BUCPChallengeRequest, newUUID func() uuid.UUID) (wire.SNACMessage, error)
	BUCPLogin(ctx context.Context, inBody wire.SNAC_0x17_0x02_BUCPLoginRequest, advertisedHost string) (wire.SNACMessage, error)
	CrackCookie(authCookie []byte) (state.ServerCookie, error)
	FLAPLogin(ctx context.Context, inFrame wire.FLAPSignonFrame, advertisedHost string) (wire.TLVRestBlock, error)
	RegisterBOSSession(ctx context.Context, authCookie state.ServerCookie, cfg func(*state.Session)) (*state.SessionInstance, error)
	RegisterChatSession(ctx context.Context, authCookie state.ServerCookie, cfg func(sess *state.Session)) (*state.SessionInstance, error)
	RetrieveBOSSession(ctx context.Context, authCookie state.ServerCookie) (*state.SessionInstance, error)
	Signout(ctx context.Context, session *state.Session)
	SignoutChat(ctx context.Context, sess *state.Session)
}

type LocateService interface {
	SetDirInfo(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x02_0x09_LocateSetDirInfo) (wire.SNACMessage, error)
	SetInfo(ctx context.Context, instance *state.SessionInstance, inBody wire.SNAC_0x02_0x04_LocateSetInfo) error
	UserInfoQuery(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x02_0x05_LocateUserInfoQuery) (wire.SNACMessage, error)
	DirInfo(ctx context.Context, inFrame wire.SNACFrame, inBody wire.SNAC_0x02_0x0B_LocateGetDirInfo) (wire.SNACMessage, error)
}

type DirSearchService interface {
	InfoQuery(ctx context.Context, inFrame wire.SNACFrame, inBody wire.SNAC_0x0F_0x02_InfoQuery) (wire.SNACMessage, error)
}

type PermitDenyService interface {
	AddDenyListEntries(ctx context.Context, instance *state.SessionInstance, inBody wire.SNAC_0x09_0x07_PermitDenyAddDenyListEntries) error
	AddPermListEntries(ctx context.Context, instance *state.SessionInstance, inBody wire.SNAC_0x09_0x05_PermitDenyAddPermListEntries) error
	DelDenyListEntries(ctx context.Context, instance *state.SessionInstance, inBody wire.SNAC_0x09_0x08_PermitDenyDelDenyListEntries) error
	DelPermListEntries(ctx context.Context, instance *state.SessionInstance, inBody wire.SNAC_0x09_0x06_PermitDenyDelPermListEntries) error
	RightsQuery(ctx context.Context, inFrame wire.SNACFrame) wire.SNACMessage
}

// BuddyListRegistry is the interface for keeping track of users with active
// buddy lists. Once registered, a user becomes visible to other users' buddy
// lists and vice versa.
type BuddyListRegistry interface {
	RegisterBuddyList(ctx context.Context, user state.IdentScreenName) error
	UnregisterBuddyList(ctx context.Context, user state.IdentScreenName) error
}

type TOCConfigStore interface {
	// SetTOCConfig sets the user's TOC config. The TOC config is the server-side
	// buddy list functionality for TOC. This configuration is not available to
	// OSCAR clients.
	SetTOCConfig(ctx context.Context, user state.IdentScreenName, config string) error
	User(ctx context.Context, screenName state.IdentScreenName) (*state.User, error)
}

type FeedbagManager interface {
	// Feedbag fetches the contents of a user's feedbag for CONFIG2
	Feedbag(ctx context.Context, screenName state.IdentScreenName) ([]wire.FeedbagItem, error)
	UseFeedbag(ctx context.Context, screenName state.IdentScreenName) error
}

// FeedbagService defines the interface for managing server-side buddy lists
// (feedbag) and related operations.
type FeedbagService interface {
	DeleteItem(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x13_0x0A_FeedbagDeleteItem) (*wire.SNACMessage, error)
	Query(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame) (wire.SNACMessage, error)
	QueryIfModified(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x13_0x05_FeedbagQueryIfModified) (wire.SNACMessage, error)
	RespondAuthorizeToHost(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x13_0x1A_FeedbagRespondAuthorizeToHost) error
	RightsQuery(ctx context.Context, inFrame wire.SNACFrame) wire.SNACMessage
	StartCluster(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x13_0x11_FeedbagStartCluster)
	EndCluster(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame)
	UpsertItem(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, items []wire.FeedbagItem) (*wire.SNACMessage, error)
	Use(ctx context.Context, instance *state.SessionInstance) error
}

// CookieBaker defines methods for issuing and verifying AIM authentication tokens ("cookies").
// These tokens are used for authenticating client sessions with AIM services.
type CookieBaker interface {
	// Crack verifies and decodes a previously issued authentication token.
	// Returns the original payload if the token is valid.
	Crack(data []byte) ([]byte, error)

	// Issue creates a new authentication token from the given payload.
	// The resulting token can later be verified using Crack.
	Issue(data []byte) ([]byte, error)
}

type AdminService interface {
	InfoChangeRequest(ctx context.Context, instance *state.SessionInstance, inFrame wire.SNACFrame, inBody wire.SNAC_0x07_0x04_AdminInfoChangeRequest) (wire.SNACMessage, error)
}

// SessionRetriever defines a method for retrieving an active session
// associated with a given screen name.
type SessionRetriever interface {
	// RetrieveSession returns the session associated with the given screen name,
	// or nil if no active session exists. Returns the Session object if there
	// are active instances with complete signon.
	RetrieveSession(screenName state.IdentScreenName) *state.Session
}

type OSCARProxyer interface {
	Signon(ctx context.Context, args []byte, isTOC1 bool) (*state.Session, []string)
	RecvBOS(ctx context.Context, sessBOS *state.Session, chatRegistry *ChatRegistry, msgCh chan<- []string) error
	RecvClientCmd(ctx context.Context, sessBOS *state.Session, chatRegistry *ChatRegistry, payload []byte, toCh chan<- []string, doAsync func(f func() error)) []string
	NewServeMux() http.Handler
}

// ChatSessionManager is the interface for closing chat sessions
// when a client disconnects.
type ChatSessionManager interface {
	RemoveUserFromAllChats(user state.IdentScreenName)
}