package process

import (
	"os"
	"path/filepath"
	"testing"
)

func newTestManager(t *testing.T) *Manager {
	t.Helper()
	dir := t.TempDir()
	script := filepath.Join(dir, "fake-frpc")
	// A fake frpc that sleeps (simulating a healthy worker).
	if err := os.WriteFile(script, []byte("#!/bin/sh\nsleep 60\n"), 0o700); err != nil {
		t.Fatal(err)
	}
	opts := Options{
		ConfigsDir: filepath.Join(dir, "configs"),
		LogsDir:    filepath.Join(dir, "logs"),
		BinaryPath: func() string { return script },
		Render: func(name string) ([]byte, error) {
			return []byte(`{"name":"` + name + `"}`), nil
		},
		AutoRestart:     func(string) bool { return false },
		RestartInterval: func() int { return 1 },
	}
	return NewManager(opts)
}

func TestStartStop(t *testing.T) {
	pm := newTestManager(t)
	if err := pm.Start("srv-a"); err != nil {
		t.Fatal(err)
	}
	st, has := pm.Status("srv-a")
	if !has || st.State != "running" || st.Pid <= 0 {
		t.Fatalf("status = %+v has=%v", st, has)
	}
	if err := pm.Stop("srv-a"); err != nil {
		t.Fatal(err)
	}
	st, has = pm.Status("srv-a")
	if has {
		t.Fatalf("after stop has=%v", has)
	}
}

func TestConfigWritten(t *testing.T) {
	pm := newTestManager(t)
	_ = pm.Start("srv-b")
	defer pm.Stop("srv-b")
	data, err := os.ReadFile(pm.ConfigPath("srv-b"))
	if err != nil {
		t.Fatal(err)
	}
	if string(data) != `{"name":"srv-b"}` {
		t.Fatalf("config = %s", data)
	}
}