package services

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

func TestSettingsManager_LoadDefaults(t *testing.T) {
	dir := t.TempDir()
	sm := NewSettingsManager(dir)

	s, err := sm.Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if s.IPPort != "0.0.0.0:2302" {
		t.Errorf("IPPort = %q, want %q", s.IPPort, "0.0.0.0:2302")
	}
	if s.ServerParameters != "-server -world=empty -loadMissionToMemory -noPause" {
		t.Errorf("ServerParameters = %q", s.ServerParameters)
	}
	if s.SteamBranch != "stable" {
		t.Errorf("SteamBranch = %q, want %q", s.SteamBranch, "stable")
	}
	if s.SteamUser != "anonymous" {
		t.Errorf("SteamUser = %q, want %q", s.SteamUser, "anonymous")
	}
	if s.Platform != "linux" {
		t.Errorf("Platform = %q, want %q", s.Platform, "linux")
	}
	if s.AutoUpdateOnStartup {
		t.Error("AutoUpdateOnStartup should be false by default")
	}
	if s.WasRunning {
		t.Error("WasRunning should be false by default")
	}
}

func TestSettingsManager_SaveLoadRoundTrip(t *testing.T) {
	dir := t.TempDir()
	sm := NewSettingsManager(dir)

	s, err := sm.Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}

	s.IPPort = "192.168.1.100:2400"
	s.SteamUser = "myuser"
	s.Platform = "windows"
	s.CBASettings = "some_cba_content"
	s.AutoUpdateOnStartup = true
	s.WasRunning = true
	s.ScheduledUpdate = "0 4 * * *"

	if err := sm.Save(s); err != nil {
		t.Fatalf("Save() error = %v", err)
	}

	// Verify file exists
	if _, err := os.Stat(filepath.Join(dir, "settings.json")); os.IsNotExist(err) {
		t.Fatal("settings.json not created")
	}

	// Load in a new manager to verify persistence
	sm2 := NewSettingsManager(dir)
	s2, err := sm2.Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if s2.IPPort != "192.168.1.100:2400" {
		t.Errorf("IPPort = %q, want %q", s2.IPPort, "192.168.1.100:2400")
	}
	if s2.SteamUser != "myuser" {
		t.Errorf("SteamUser = %q, want %q", s2.SteamUser, "myuser")
	}
	if s2.Platform != "windows" {
		t.Errorf("Platform = %q, want %q", s2.Platform, "windows")
	}
	if s2.CBASettings != "some_cba_content" {
		t.Errorf("CBASettings = %q, want %q", s2.CBASettings, "some_cba_content")
	}
	if !s2.AutoUpdateOnStartup {
		t.Error("AutoUpdateOnStartup should be true")
	}
	if !s2.WasRunning {
		t.Error("WasRunning should be true")
	}
	if s2.ScheduledUpdate != "0 4 * * *" {
		t.Errorf("ScheduledUpdate = %q, want %q", s2.ScheduledUpdate, "0 4 * * *")
	}
}

func TestSettingsManager_LoadMissingFile(t *testing.T) {
	dir := t.TempDir()
	sm := NewSettingsManager(dir)

	s, err := sm.Load()
	if err != nil {
		t.Fatalf("Load() error = %v, want nil", err)
	}
	if s == nil {
		t.Fatal("Load() returned nil settings")
	}
	if s.IPPort != "0.0.0.0:2302" {
		t.Errorf("default IPPort = %q, want %q", s.IPPort, "0.0.0.0:2302")
	}
}

func TestSettingsManager_SaveUpdatesTimestamp(t *testing.T) {
	dir := t.TempDir()
	sm := NewSettingsManager(dir)

	s, _ := sm.Load()
	s.SteamUser = "test"
	if err := sm.Save(s); err != nil {
		t.Fatalf("Save() error = %v", err)
	}

	s2, _ := sm.Load()
	if s2.UpdatedAt.IsZero() {
		t.Error("UpdatedAt should be set after Save()")
	}
}