package mr

//
// RPC definitions.
//
// remember to capitalize all names.
//

import "os"
import "strconv"

//
// example to show how to declare the arguments
// and reply for an RPC.
//

type ExampleArgs struct {
    X int
}

type ExampleReply struct {
    Y int
}

// Add your RPC definitions here.

type JobType uint8
const (
    Map JobType = iota
    Reduce
)

type MapJob struct {
    //Index             int
    InputFile         string
    ReducerCount      int
    //IntermediateFiles []string
}

type ReduceJob struct {
    ReducerNumber     int
    IntermediateFiles []string
}

type MapResult struct {
    InputFile         string
    IntermediateFiles []string
    WorkerId          int
}

type RegisterArgs struct {
    // empty
}

type RegisterReply struct {
    WorkerId int
}

type GetJobArgs struct {
    WorkerId int
}

type GetJobReply struct {
    JobType  JobType

    MapJob    MapJob
    ReduceJob ReduceJob

    Finished bool
}

type FinishReply struct {

}

// Cook up a unique-ish UNIX-domain socket name
// in /var/tmp, for the coordinator.
// Can't use the current directory since
// Athena AFS doesn't support UNIX-domain sockets.
func coordinatorSock() string {
    s := "/var/tmp/5840-mr-"
    s += strconv.Itoa(os.Getuid())
    return s
}