package httpd

import (
	"os/exec"
	"strings"
	"testing"
)

// Chapter 15's whole flow is one line, and the line pointed at a 404 until this existed.
func TestRunnerScriptIsRealShellAndCarriesTheToken(t *testing.T) {
	script := runnerScript("https://barerepo.example/")

	// The trailing slash must not survive into the urls the script builds.
	if strings.Contains(script, "barerepo.example//") {
		t.Error("the external url's trailing slash reached a request path")
	}
	for _, want := range []string{
		// The token arrives as $1, because the setup page says sh -s <token>.
		`TOKEN="${1:-}"`,
		`SERVER="https://barerepo.example"`,
		"$SERVER/runner/binary?token=$TOKEN",
		`exec "$DIR/barerepo-runner" "$TOKEN" --server "$SERVER"`,
		// Chapter 15: no second step, so the script attaches rather than telling you to.
		"\"$TOKEN\"",
	} {
		if !strings.Contains(script, want) {
			t.Errorf("the install script is missing %q", want)
		}
	}

	// A script served to be piped into sh has to parse in sh.
	cmd := exec.Command("sh", "-n")
	cmd.Stdin = strings.NewReader(script)
	if out, err := cmd.CombinedOutput(); err != nil {
		t.Fatalf("sh -n rejected the install script: %v\n%s", err, out)
	}

	// With no token it must say the line to paste, not download anything.
	cmd = exec.Command("sh", "-s")
	cmd.Stdin = strings.NewReader(script)
	out, err := cmd.CombinedOutput()
	if err == nil {
		t.Error("the script ran with no token instead of refusing")
	}
	if !strings.Contains(string(out), "usage: curl -sL https://barerepo.example/runner.sh") {
		t.Errorf("the refusal does not show the line to paste: %s", out)
	}
}

// The server can only hand out the binary it is running, and a wrong-arch binary is worse than none.
func TestRunnerScriptRefusesAnotherPlatform(t *testing.T) {
	script := runnerScript("https://barerepo.example")
	if !strings.Contains(script, `HAVE="`+platform()+`"`) {
		t.Error("the script does not name the platform this server can serve")
	}
	if !strings.Contains(script, `if [ "$WANT" != "$HAVE" ]`) {
		t.Error("the script does not compare the asking platform with the served one")
	}
	// It has to leave the reader a way through rather than only an error.
	for _, want := range []string{"go build -o barerepo-runner ./cmd/barerepo-runner", "$TOKEN --server $SERVER"} {
		if !strings.Contains(script, want) {
			t.Errorf("the mismatch message does not tell the reader what to run instead: %q", want)
		}
	}
}

// Chapter 15 shows three platforms at once, so the windows half is not allowed to be a stub.
func TestRunnerPS1CarriesTheTokenAndTheServer(t *testing.T) {
	ps := runnerPS1("https://barerepo.example/")
	for _, want := range []string{
		`$server = "https://barerepo.example"`,
		"$server/runner/binary?token=$Token",
		"$Token --server $server",
	} {
		if !strings.Contains(ps, want) {
			t.Errorf("the powershell install is missing %q", want)
		}
	}
}