// +build linux darwin

package proc_test

import (
	"fmt"
	"runtime"
	"syscall"
	"testing"
	"time"

	"github.com/derekparker/delve/pkg/proc"
	protest "github.com/derekparker/delve/pkg/proc/test"
)

type errIssue419 struct {
	pid int
	err error
}

func (npe errIssue419) Error() string {
	return fmt.Sprintf("Pid is zero or negative: %d", npe.pid)
}

func TestIssue419(t *testing.T) {
	if testBackend == "lldb" && runtime.GOOS == "darwin" {
		// debugserver bug?
		return
	}
	if testBackend == "rr" {
		return
	}

	errChan := make(chan error, 2)

	// SIGINT directed at the inferior should be passed along not swallowed by delve
	withTestProcess("issue419", t, func(p proc.Process, fixture protest.Fixture) {
		defer close(errChan)
		_, err := setFunctionBreakpoint(p, "main.main")
		assertNoError(err, t, "SetBreakpoint()")
		assertNoError(proc.Continue(p), t, "Continue()")
		resumeChan := make(chan struct{}, 1)
		go func() {
			time.Sleep(500 * time.Millisecond)
			<-resumeChan
			if p.Pid() <= 0 {
				// if we don't stop the inferior the test will never finish
				p.RequestManualStop()
				err := p.Detach(true)
				errChan <- errIssue419{pid: p.Pid(), err: err}
				return
			}
			err := syscall.Kill(p.Pid(), syscall.SIGINT)
			errChan <- errIssue419{pid: p.Pid(), err: err}
		}()
		p.ResumeNotify(resumeChan)
		errChan <- proc.Continue(p)
	})

	for i := 0; i < 2; i++ {
		err := <-errChan

		if v, ok := err.(errIssue419); ok {
			assertNoError(v.err, t, "syscall.Kill")
			continue
		}

		if _, exited := err.(proc.ProcessExitedError); !exited {
			t.Fatalf("Unexpected error after Continue(): %v\n", err)
		}
	}
}