import * as I from "./Interfaces";

export type AnyFunction = (...args:any) => any
export type HookFunction<F extends AnyFunction = AnyFunction, SubresT = {}> = (...args: Parameters<F>) => Promise<SubscriptionResponse<SubresT> | ErrorResponse>

export type Visibility = "127.0.0.1" | "0.0.0.0"
export type ConnectionHandler = (socket:I.Socket) => void
export type ErrorHandler = (socket:I.Socket, error:any, rpcName: string, args: any[]) => void
export type CloseHandler = (socket:I.Socket) =>  void
export type SesameFunction = (sesame : string) => boolean
export type ExceptionHandling = 'local' | 'remote'
export type SesameConf = {
    sesame?: string | SesameFunction
}
export type FrontEndHandlerType = {
    'error' : (e: any) => void
    'close' : () => void
}

export type ServerConf = {
    connectionHandler?: ConnectionHandler
    errorHandler?: ErrorHandler
    closeHandler?: CloseHandler
    visibility?: Visibility
    exceptionHandling?: ExceptionHandling
} & SesameConf

export type SocketConf = {
    tls:boolean
}

export type ResponseType = "Subscribe" | "Success" | "Error"
export type Outcome = "Success" | "Error"

export type Respose<T> = T & { result: Outcome }
export type SuccessResponse<T = {}> = Respose<T> & { result: "Success" } 
export type ErrorResponse<T = {}> = Respose<T> & { result: "Error", message?:string }
export type SubscriptionResponse<T = {}> = Respose<T> & { result: "Success"; uuid: string }

export type RPCType = 'Hook' | 'Unhook' | 'Call'

export type CallRPC<N, F> = {
    name: N
    call: F
}

export type HookRPC<N, F extends AnyFunction, SubresT = {}> = {
    name: N
    hook: HookFunction<F, SubresT>
    onCallback?: AnyFunction
    onClose?: HookCloseFunction<SubresT>
}

export type RPC<N, F extends AnyFunction, SubresT = {}> = HookRPC<N, F, SubresT> | CallRPC<N,F> | F

export type RPCInterface<Impl extends RPCInterface = {}> = {
    [grp in string] : {
        [rpc in string] : AnyFunction
    } 
} & Impl

export type RPCInterfaceArray<Itfc extends RPCInterface, SubresT = {}> = {
    [grp in keyof Itfc]: Array<
      { [rpc in keyof Itfc[grp]]: RPC<rpc, Itfc[grp][rpc], SubresT> }[keyof Itfc[grp]]
    >
}

export type BaseInfo = {
    name: string,
    owner: string,
    argNames: string[],
}

export type HookInfo<SubresT = {}> = BaseInfo & { 
    type: 'Hook', 
    generator: (socket?:I.Socket) => (...args:any[]) => SubresT
}

export type CallInfo = BaseInfo & {
    type: 'Call',
    call: AnyFunction
}

export type RpcInfo = HookInfo |  CallInfo
export type ExtendedRpcInfo = RpcInfo & { uniqueName: string } 

export type OnFunction = <T extends "error" | "close">(type: T, f: FrontEndHandlerType[T]) => void
export type HookCloseFunction<T = {}> = (res:SubscriptionResponse<T>, rpc:HookRPC<any, any, T>) => any