package cmdext

import (
	"errors"
	"fmt"
	"testing"
	"time"
)

func TestStdout(t *testing.T) {

	res1, err := Runner("printf").Arg("hello").Run()
	if err != nil {
		t.Errorf("%v", err)
	}
	if res1.CommandTimedOut {
		t.Errorf("Timeout")
	}
	if res1.ExitCode != 0 {
		t.Errorf("res1.ExitCode == %v", res1.ExitCode)
	}
	if res1.StdErr != "" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if res1.StdOut != "hello" {
		t.Errorf("res1.StdOut == '%v'", res1.StdOut)
	}
	if res1.StdCombined != "hello\n" {
		t.Errorf("res1.StdCombined == '%v'", res1.StdCombined)
	}

}

func TestStderr(t *testing.T) {

	res1, err := Runner("python3").Arg("-c").Arg("import sys; print(\"error\", file=sys.stderr, end='')").Run()
	if err != nil {
		t.Errorf("%v", err)
	}
	if res1.CommandTimedOut {
		t.Errorf("Timeout")
	}
	if res1.ExitCode != 0 {
		t.Errorf("res1.ExitCode == %v", res1.ExitCode)
	}
	if res1.StdErr != "error" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if res1.StdOut != "" {
		t.Errorf("res1.StdOut == '%v'", res1.StdOut)
	}
	if res1.StdCombined != "error\n" {
		t.Errorf("res1.StdCombined == '%v'", res1.StdCombined)
	}

}

func TestStdcombined(t *testing.T) {
	res1, err := Runner("python3").
		Arg("-c").
		Arg("import sys; import time; print(\"1\", file=sys.stderr, flush=True); time.sleep(0.1); print(\"2\", file=sys.stdout, flush=True); time.sleep(0.1); print(\"3\", file=sys.stderr, flush=True)").
		Run()
	if err != nil {
		t.Errorf("%v", err)
	}
	if res1.CommandTimedOut {
		t.Errorf("Timeout")
	}
	if res1.ExitCode != 0 {
		t.Errorf("res1.ExitCode == %v", res1.ExitCode)
	}
	if res1.StdErr != "1\n3\n" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if res1.StdOut != "2\n" {
		t.Errorf("res1.StdOut == '%v'", res1.StdOut)
	}
	if res1.StdCombined != "1\n2\n3\n" {
		t.Errorf("res1.StdCombined == '%v'", res1.StdCombined)
	}

}

func TestPartialRead(t *testing.T) {
	res1, err := Runner("python3").
		Arg("-c").
		Arg("import sys; import time; print(\"first message\", flush=True); time.sleep(5); print(\"cant see me\", flush=True);").
		Timeout(100 * time.Millisecond).
		Run()
	if err != nil {
		t.Errorf("%v", err)
	}
	if !res1.CommandTimedOut {
		t.Errorf("!CommandTimedOut")
	}
	if res1.StdErr != "" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if res1.StdOut != "first message\n" {
		t.Errorf("res1.StdOut == '%v'", res1.StdOut)
	}
	if res1.StdCombined != "first message\n" {
		t.Errorf("res1.StdCombined == '%v'", res1.StdCombined)
	}

}

func TestPartialReadStderr(t *testing.T) {
	res1, err := Runner("python3").
		Arg("-c").
		Arg("import sys; import time; print(\"first message\", file=sys.stderr, flush=True); time.sleep(5); print(\"cant see me\", file=sys.stderr, flush=True);").
		Timeout(100 * time.Millisecond).
		Run()
	if err != nil {
		t.Errorf("%v", err)
	}
	if !res1.CommandTimedOut {
		t.Errorf("!CommandTimedOut")
	}
	if res1.StdErr != "first message\n" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if res1.StdOut != "" {
		t.Errorf("res1.StdOut == '%v'", res1.StdOut)
	}
	if res1.StdCombined != "first message\n" {
		t.Errorf("res1.StdCombined == '%v'", res1.StdCombined)
	}

}

func TestReadUnflushedStdout(t *testing.T) {

	res1, err := Runner("python3").Arg("-c").Arg("import sys; print(\"message101\", file=sys.stdout, end='')").Run()
	if err != nil {
		t.Errorf("%v", err)
	}
	if res1.CommandTimedOut {
		t.Errorf("Timeout")
	}
	if res1.ExitCode != 0 {
		t.Errorf("res1.ExitCode == %v", res1.ExitCode)
	}
	if res1.StdErr != "" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if res1.StdOut != "message101" {
		t.Errorf("res1.StdOut == '%v'", res1.StdOut)
	}
	if res1.StdCombined != "message101\n" {
		t.Errorf("res1.StdCombined == '%v'", res1.StdCombined)
	}

}

func TestReadUnflushedStderr(t *testing.T) {

	res1, err := Runner("python3").Arg("-c").Arg("import sys; print(\"message101\", file=sys.stderr, end='')").Run()
	if err != nil {
		t.Errorf("%v", err)
	}
	if res1.CommandTimedOut {
		t.Errorf("Timeout")
	}
	if res1.ExitCode != 0 {
		t.Errorf("res1.ExitCode == %v", res1.ExitCode)
	}
	if res1.StdErr != "message101" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if res1.StdOut != "" {
		t.Errorf("res1.StdOut == '%v'", res1.StdOut)
	}
	if res1.StdCombined != "message101\n" {
		t.Errorf("res1.StdCombined == '%v'", res1.StdCombined)
	}

}

func TestPartialReadUnflushed(t *testing.T) {
	t.SkipNow()

	res1, err := Runner("python3").
		Arg("-c").
		Arg("import sys; import time; print(\"first message\", end=''); time.sleep(5); print(\"cant see me\", end='');").
		Timeout(100 * time.Millisecond).
		Run()
	if err != nil {
		t.Errorf("%v", err)
	}
	if !res1.CommandTimedOut {
		t.Errorf("!CommandTimedOut")
	}
	if res1.StdErr != "" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if res1.StdOut != "first message" {
		t.Errorf("res1.StdOut == '%v'", res1.StdOut)
	}
	if res1.StdCombined != "first message" {
		t.Errorf("res1.StdCombined == '%v'", res1.StdCombined)
	}

}

func TestPartialReadUnflushedStderr(t *testing.T) {
	t.SkipNow()

	res1, err := Runner("python3").
		Arg("-c").
		Arg("import sys; import time; print(\"first message\", file=sys.stderr, end=''); time.sleep(5); print(\"cant see me\", file=sys.stderr, end='');").
		Timeout(100 * time.Millisecond).
		Run()
	if err != nil {
		t.Errorf("%v", err)
	}
	if !res1.CommandTimedOut {
		t.Errorf("!CommandTimedOut")
	}
	if res1.StdErr != "first message" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if res1.StdOut != "" {
		t.Errorf("res1.StdOut == '%v'", res1.StdOut)
	}
	if res1.StdCombined != "first message" {
		t.Errorf("res1.StdCombined == '%v'", res1.StdCombined)
	}

}

func TestListener(t *testing.T) {

	res1, err := Runner("python3").
		Arg("-c").
		Arg("import sys;" +
			"import time;" +
			"print(\"message 1\", flush=True);" +
			"time.sleep(1);" +
			"print(\"message 2\", flush=True);" +
			"time.sleep(1);" +
			"print(\"message 3\", flush=True);" +
			"time.sleep(1);" +
			"print(\"message 4\", file=sys.stderr, flush=True);" +
			"time.sleep(1);" +
			"print(\"message 5\", flush=True);" +
			"time.sleep(1);" +
			"print(\"final\");").
		ListenStdout(func(s string) { fmt.Printf("@@STDOUT <<- %v (%v)\n", s, time.Now().Format(time.RFC3339Nano)) }).
		ListenStderr(func(s string) { fmt.Printf("@@STDERR <<- %v (%v)\n", s, time.Now().Format(time.RFC3339Nano)) }).
		Timeout(10 * time.Second).
		Run()

	if err != nil {
		panic(err)
	}
	if res1.CommandTimedOut {
		t.Errorf("Timeout")
	}
	if res1.ExitCode != 0 {
		t.Errorf("res1.ExitCode == %v", res1.ExitCode)
	}
}

func TestLongStdout(t *testing.T) {

	res1, err := Runner("python3").
		Arg("-c").
		Arg("import sys; import time; print(\"X\" * 125001 + \"\\n\"); print(\"Y\" * 125001 + \"\\n\"); print(\"Z\" * 125001 + \"\\n\");").
		Timeout(5000 * time.Millisecond).
		Run()
	if err != nil {
		t.Errorf("%v", err)
	}
	if res1.CommandTimedOut {
		t.Errorf("Timeout")
	}
	if res1.ExitCode != 0 {
		t.Errorf("res1.ExitCode == %v", res1.ExitCode)
	}
	if res1.StdErr != "" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if len(res1.StdOut) != 375009 {
		t.Errorf("len(res1.StdOut) == '%v'", len(res1.StdOut))
	}

}

func TestFailOnTimeout(t *testing.T) {

	_, err := Runner("sleep").Arg("2").Timeout(200 * time.Millisecond).FailOnTimeout().Run()
	if !errors.Is(err, ErrTimeout) {
		t.Errorf("wrong err := %v", err)
	}

}

func TestFailOnStderr(t *testing.T) {

	res1, err := Runner("python3").Arg("-c").Arg("import sys; print(\"error\", file=sys.stderr, end='')").FailOnStderr().Run()
	if err == nil {
		t.Errorf("no err")
	}
	if res1.CommandTimedOut {
		t.Errorf("Timeout")
	}
	if res1.ExitCode != -1 {
		t.Errorf("res1.ExitCode == %v", res1.ExitCode)
	}
	if res1.StdErr != "error" {
		t.Errorf("res1.StdErr == '%v'", res1.StdErr)
	}
	if res1.StdOut != "" {
		t.Errorf("res1.StdOut == '%v'", res1.StdOut)
	}
	if res1.StdCombined != "error\n" {
		t.Errorf("res1.StdCombined == '%v'", res1.StdCombined)
	}

}

func TestFailOnExitcode(t *testing.T) {

	_, err := Runner("false").Timeout(200 * time.Millisecond).FailOnExitCode().Run()
	if !errors.Is(err, ErrExitCode) {
		t.Errorf("wrong err := %v", err)
	}

}

func TestEnsureExitcode1(t *testing.T) {

	_, err := Runner("false").Timeout(200 * time.Millisecond).EnsureExitcode(1).Run()
	if err != nil {
		t.Errorf("wrong err := %v", err)
	}

}

func TestEnsureExitcode2(t *testing.T) {

	_, err := Runner("false").Timeout(200*time.Millisecond).EnsureExitcode(0, 2, 3).Run()
	if err != ErrExitCode {
		t.Errorf("wrong err := %v", err)
	}

}